Ubuntu
linux package

arm64 gcov in 5.8 breaks when trying to enable it

Bug #1891288 reported by Colin Ian King on 2020-08-12

This bug affects 1 person

Affects		Status	Importance	Assigned to	Milestone
	Linux	Confirmed	Unknown	linux-kernel-bugs #208885
	linux (Ubuntu)	Fix Released	Medium	Colin Ian King

Bug Description

Running:

sudo lcov --zerocounters on a gcov enabled kernel causes a read-only splat:

[ 139.798968] Unable to handle kernel write to read-only memory at virtual address ffffb4511ee6bb10
[ 139.803325] Mem abort info:
[ 139.804882] ESR = 0x9600004e
[ 139.806265] EC = 0x25: DABT (current EL), IL = 32 bits
[ 139.811261] SET = 0, FnV = 0
[ 139.814163] EA = 0, S1PTW = 0
[ 139.816545] Data abort info:
[ 139.817852] ISV = 0, ISS = 0x0000004e
[ 139.820023] CM = 0, WnR = 1
[ 139.821350] swapper pgtable: 4k pages, 48-bit VAs, pgdp=000000005086f000
[ 139.825005] [ffffb4511ee6bb10] pgd=00000001b6fff003, p4d=00000001b6fff003, pud=00000001b6ffe003, pmd=004000004e200f91
[ 139.832061] Internal error: Oops: 9600004e [#1] SMP
[ 139.835002] Modules linked in: nls_iso8859_1 dm_multipath scsi_dh_rdac scsi_dh_emc scsi_dh_alua efi_pstore qemu_fw_cfg sch_fq_codel drm virtio_rng ip_t
ables x_tables autofs4 btrfs blake2b_generic raid10 raid456 async_raid6_recov async_memcpy async_pq async_xor async_tx xor xor_neon raid6_pq libcrc32c rai
d1 raid0 multipath linear crct10dif_ce ghash_ce sha2_ce sha256_arm64 sha1_ce virtio_net net_failover xhci_pci virtio_blk virtio_scsi failover xhci_pci_ren
esas aes_neon_bs aes_neon_blk aes_ce_blk crypto_simd cryptd aes_ce_cipher
[ 139.865929] CPU: 5 PID: 1235 Comm: lcov Tainted: G W 5.8.0-8-generic #9
[ 139.871293] Hardware name: QEMU KVM Virtual Machine, BIOS 0.0.0 02/06/2015
[ 139.876248] pstate: 20400005 (nzCv daif +PAN -UAO BTYPE=--)
[ 139.879993] pc : __memset+0x148/0x188
[ 139.882387] lr : gcov_info_reset+0xa0/0x110
[ 139.885404] sp : ffff8000122f3bf0
[ 139.887730] x29: ffff8000122f3bf0 x28: ffff000167480f40
[ 139.891129] x27: 0000000000000000 x26: ffffb450e46bc060
[ 139.894688] x25: 0000000000000001 x24: ffffb450e46bc040
[ 139.897391] x23: 0000000000000000 x22: ffffb450e46bc0a8
[ 139.900064] x21: ffffb45122ba5db8 x20: ffffb450e46bc068
[ 139.902681] x19: ffffb450e46bc068 x18: 0000000000000000
[ 139.905345] x17: 0000000000000000 x16: 0000000000000000
[ 139.908016] x15: 0000000000000000 x14: 0000000000000000
[ 139.910625] x13: 0000000000000000 x12: 0000000000000000
[ 139.913260] x11: 0000000000000000 x10: 0000000000000000
[ 139.915922] x9 : 0000000000000000 x8 : ffffb4511ee6bb10
[ 139.918531] x7 : 0000000000000000 x6 : 000000000000003f
[ 139.921196] x5 : 0000000000000040 x4 : 0000000000000030
[ 139.923852] x3 : 00000007235d7fd0 x2 : 00000007235d7fd0
[ 139.926460] x1 : 0000000000000000 x0 : ffffb4511ee6bb10
[ 139.929126] Call trace:
[ 139.930349] __memset+0x148/0x188
[ 139.932025] reset_node+0x70/0xc0
[ 139.933662] reset_write+0xc0/0x130
[ 139.935389] full_proxy_write+0x98/0x110
[ 139.937349] vfs_write+0x18c/0x3e0
[ 139.939031] ksys_write+0xc4/0x1f0
[ 139.940766] __arm64_sys_write+0x44/0x60
[ 139.942705] invoke_syscall+0x74/0x150
[ 139.944601] el0_svc_common.constprop.0+0x94/0x264
[ 139.946961] do_el0_svc+0x5c/0x7c
[ 139.948651] el0_svc+0x70/0x114
[ 139.950206] el0_sync_handler+0x140/0x39c
[ 139.952239] el0_sync+0x17c/0x180
[ 139.953894] Code: f101007f fa45a068 54fffc0b aa0303e2 (a9001d07)
[ 139.956946] ---[ end trace 71e2f9cc3eaddf4e ]---

See original description

Colin Ian King (colin-king) on 2020-08-12

Changed in linux (Ubuntu):
importance:	Undecided → Medium
assignee:	nobody → Colin Ian King (colin-king)
status:	New → In Progress

Revision history for this message

In Linux Kernel Bug Tracker #208885, colin.king (colin.king-linux-kernel-bugs) wrote on 2020-08-12:

Download full text (3.3 KiB)

5.8 kernel running on a QEMU KVM Virtual Machine, arm64, gcov enabled:

CONFIG_GCOV_KERNEL=y
CONFIG_ARCH_HAS_GCOV_PROFILE_ALL=y
CONFIG_GCOV_PROFILE_ALL=y

running: sudo lcov --zerocounters

..causes the following splat:

[ 78.634926] Unable to handle kernel write to read-only memory at virtual address ffffd764f255bb10
[ 78.639076] Mem abort info:
[ 78.640313] ESR = 0x9600004e
[ 78.641656] EC = 0x25: DABT (current EL), IL = 32 bits
[ 78.644351] SET = 0, FnV = 0
[ 78.645766] EA = 0, S1PTW = 0
[ 78.649526] Data abort info:
[ 78.654341] ISV = 0, ISS = 0x0000004e
[ 78.656851] CM = 0, WnR = 1
[ 78.659043] swapper pgtable: 4k pages, 48-bit VAs, pgdp=00000000b775f000
[ 78.665822] [ffffd764f255bb10] pgd=00000001b6fff003, p4d=00000001b6fff003, pud=00000001b6ffe003, pmd=00400000b5000f91
[ 78.677367] Internal error: Oops: 9600004e [#1] SMP
[ 78.681204] Modules linked in: nls_iso8859_1 dm_multipath scsi_dh_rdac scsi_dh_emc scsi_dh_alua efi_pstore qemu_fw_cfg sch_fq_codel drm virtio_rng ip_t
ables x_tables autofs4 btrfs blake2b_generic raid10 raid456 async_raid6_recov async_memcpy async_pq async_xor async_tx xor xor_neon raid6_pq libcrc32c rai
d1 raid0 multipath linear crct10dif_ce ghash_ce sha2_ce sha256_arm64 sha1_ce virtio_net xhci_pci net_failover virtio_blk virtio_scsi failover xhci_pci_ren
esas aes_neon_bs aes_neon_blk aes_ce_blk crypto_simd cryptd aes_ce_cipher
[ 78.722642] CPU: 14 PID: 1175 Comm: lcov Tainted: G W 5.8.0-8-generic #9
[ 78.729364] Hardware name: QEMU KVM Virtual Machine, BIOS 0.0.0 02/06/2015
[ 78.733467] pstate: 20400005 (nzCv daif +PAN -UAO BTYPE=--)
[ 78.736219] pc : __memset+0x148/0x188
[ 78.737993] lr : gcov_info_reset+0xa0/0x110
[ 78.740037] sp : ffff800010e53bf0
[ 78.741624] x29: ffff800010e53bf0 x28: ffff00015a648000
[ 78.744181] x27: 0000000000000000 x26: ffffd764e3df4060
[ 78.746776] x25: 0000000000000001 x24: ffffd764e3df4040
[ 78.749310] x23: 0000000000000000 x22: ffffd764e3df40a8
[ 78.751976] x21: ffffd764f6295db8 x20: ffffd764e3df4068
[ 78.754642] x19: ffffd764e3df4068 x18: 0000000000000000
[ 78.757265] x17: 0000000000000000 x16: 0000000000000000
[ 78.759922] x15: 0000000000000000 x14: 0000000000000000
[ 78.762585] x13: 0000000000000000 x12: 0000000000000000
[ 78.765209] x11: 0000000000000000 x10: 0000000000000000
[ 78.767861] x9 : 0000000000000000 x8 : ffffd764f255bb10
[ 78.770518] x7 : 0000000000000000 x6 : 000000000000003f
[ 78.773135] x5 : 0000000000000040 x4 : 0000000000000030
[ 78.775793] x3 : 000000071ef97fd0 x2 : 000000071ef97fd0
[ 78.778449] x1 : 0000000000000000 x0 : ffffd764f255bb10
[ 78.781075] Call trace:
[ 78.782329] __memset+0x148/0x188
[ 78.783980] reset_node+0x70/0xc0
[ 78.785628] reset_write+0xc0/0x130
[ 78.787397] full_proxy_write+0x98/0x110
[ 78.789354] vfs_write+0x18c/0x3e0
[ 78.791086] ksys_write+0xc4/0x1f0
[ 78.792778] __arm64_sys_write+0x44/0x60
[ 78.794771] invoke_syscall+0x74/0x150
[ 78.796639] el0_svc_common.constprop.0+0x94/0x264
[ 78.799049] do_el0_svc+0x5c/0x7c
[ 78.800702] el0_svc+0x70/0x114
[ 78.802311] el0_sync_handler+0x140/0x39c
[ 78.804...

5.8 kernel running on a QEMU KVM Virtual Machine, arm64, gcov enabled:

CONFIG_GCOV_KERNEL=y
CONFIG_ARCH_HAS_GCOV_PROFILE_ALL=y
CONFIG_GCOV_PROFILE_ALL=y

running: sudo lcov --zerocounters

..causes the following splat:

[   78.634926] Unable to handle kernel write to read-only memory at virtual address ffffd764f255bb10
[   78.639076] Mem abort info:
[   78.640313]   ESR = 0x9600004e
[   78.641656]   EC = 0x25: DABT (current EL), IL = 32 bits
[   78.644351]   SET = 0, FnV = 0
[   78.645766]   EA = 0, S1PTW = 0
[   78.649526] Data abort info:
[   78.654341]   ISV = 0, ISS = 0x0000004e
[   78.656851]   CM = 0, WnR = 1
[   78.659043] swapper pgtable: 4k pages, 48-bit VAs, pgdp=00000000b775f000
[   78.665822] [ffffd764f255bb10] pgd=00000001b6fff003, p4d=00000001b6fff003, pud=00000001b6ffe003, pmd=00400000b5000f91
[   78.677367] Internal error: Oops: 9600004e [#1] SMP
[   78.681204] Modules linked in: nls_iso8859_1 dm_multipath scsi_dh_rdac scsi_dh_emc scsi_dh_alua efi_pstore qemu_fw_cfg sch_fq_codel drm virtio_rng ip_t
ables x_tables autofs4 btrfs blake2b_generic raid10 raid456 async_raid6_recov async_memcpy async_pq async_xor async_tx xor xor_neon raid6_pq libcrc32c rai
d1 raid0 multipath linear crct10dif_ce ghash_ce sha2_ce sha256_arm64 sha1_ce virtio_net xhci_pci net_failover virtio_blk virtio_scsi failover xhci_pci_ren
esas aes_neon_bs aes_neon_blk aes_ce_blk crypto_simd cryptd aes_ce_cipher
[   78.722642] CPU: 14 PID: 1175 Comm: lcov Tainted: G        W         5.8.0-8-generic #9
[   78.729364] Hardware name: QEMU KVM Virtual Machine, BIOS 0.0.0 02/06/2015
[   78.733467] pstate: 20400005 (nzCv daif +PAN -UAO BTYPE=--)
[   78.736219] pc : __memset+0x148/0x188
[   78.737993] lr : gcov_info_reset+0xa0/0x110
[   78.740037] sp : ffff800010e53bf0
[   78.741624] x29: ffff800010e53bf0 x28: ffff00015a648000 
[   78.744181] x27: 0000000000000000 x26: ffffd764e3df4060 
[   78.746776] x25: 0000000000000001 x24: ffffd764e3df4040 
[   78.749310] x23: 0000000000000000 x22: ffffd764e3df40a8 
[   78.751976] x21: ffffd764f6295db8 x20: ffffd764e3df4068 
[   78.754642] x19: ffffd764e3df4068 x18: 0000000000000000 
[   78.757265] x17: 0000000000000000 x16: 0000000000000000 
[   78.759922] x15: 0000000000000000 x14: 0000000000000000 
[   78.762585] x13: 0000000000000000 x12: 0000000000000000 
[   78.765209] x11: 0000000000000000 x10: 0000000000000000 
[   78.767861] x9 : 0000000000000000 x8 : ffffd764f255bb10 
[   78.770518] x7 : 0000000000000000 x6 : 000000000000003f 
[   78.773135] x5 : 0000000000000040 x4 : 0000000000000030 
[   78.775793] x3 : 000000071ef97fd0 x2 : 000000071ef97fd0 
[   78.778449] x1 : 0000000000000000 x0 : ffffd764f255bb10 
[   78.781075] Call trace:
[   78.782329]  __memset+0x148/0x188
[   78.783980]  reset_node+0x70/0xc0
[   78.785628]  reset_write+0xc0/0x130
[   78.787397]  full_proxy_write+0x98/0x110
[   78.789354]  vfs_write+0x18c/0x3e0
[   78.791086]  ksys_write+0xc4/0x1f0
[   78.792778]  __arm64_sys_write+0x44/0x60
[   78.794771]  invoke_syscall+0x74/0x150
[   78.796639]  el0_svc_common.constprop.0+0x94/0x264
[   78.799049]  do_el0_svc+0x5c/0x7c
[   78.800702]  el0_svc+0x70/0x114
[   78.802311]  el0_sync_handler+0x140/0x39c
[   78.804304]  el0_sync+0x17c/0x180
[   78.805967] Code: f101007f fa45a068 54fffc0b aa0303e2 (a9001d07) 
[   78.809019] ---[ end trace b9a826b707c133e4 ]---

Colin Ian King (colin-king) on 2020-08-12

description:

updated

Revision history for this message

Colin Ian King (colin-king) wrote on 2020-08-12:

Download full text (3.8 KiB)

Ah, earlier on boot I'm seeing:
[ 8.808508] virtio_blk virtio3: [vda] 209715200 512-byte logical blocks (107 GB/100 GiB)
[ 8.808649] ------------[ cut here ]------------
[ 8.815777] vda: detected capacity change from 0 to 107374182400
[ 8.816623] WARNING: CPU: 3 PID: 212 at mm/page_alloc.c:4813 __alloc_pages_nodemask+0x540/0x694
[ 8.816630] Modules linked in: net_failover virtio_blk(+) xhci_pci_renesas virtio_scsi(+) failover fjes(-) aes_neon_bs aes_neon_blk aes_ce_blk crypto_s
imd cryptd aes_ce_cipher
[ 8.837701] CPU: 3 PID: 212 Comm: systemd-udevd Not tainted 5.8.0-8-generic #9
[ 8.842236] Hardware name: QEMU KVM Virtual Machine, BIOS 0.0.0 02/06/2015
[ 8.846585] pstate: 20400005 (nzCv daif +PAN -UAO BTYPE=--)
[ 8.850112] pc : __alloc_pages_nodemask+0x540/0x694
[ 8.853106] lr : alloc_pages_current+0xe0/0x17c
[ 8.856024] sp : ffff8000106138c0
[ 8.858175] x29: ffff8000106138c0 x28: ffff000170252dc0
[ 8.861565] x27: 0000000000000000 x26: 0000000000000015
[ 8.865006] x25: 00000001abcfef80 x24: 0000000000000015
[ 8.868466] x23: ffff000170252dc0 x22: 0000000000000000
[ 8.871794] x21: ffffdb2796703050 x20: 0000000000040dc0
[ 8.875143] x19: ffffdb2796703250 x18: 0000000000000000
[ 8.878529] x17: 0000000000000000 x16: 0000000000000000
[ 8.881917] x15: 0000000000000000 x14: 73656a662f74656e
[ 8.885218] x13: 2f73726576697264 x12: 2f636972656e6567
[ 8.888554] x11: 2d646c6975622f64 x10: 6c6975622f6e6169
[ 8.892032] x9 : ffffdb2792b6dfa4 x8 : 63672e7366677562
[ 8.895415] x7 : 65645f73656a662f x6 : ffff0001558ef353
[ 8.898814] x5 : 0000000000000018 x4 : 0000000000000dd5
[ 8.902124] x3 : ffffdb27966ea138 x2 : 0000000000000001
[ 8.905418] x1 : ffffdb27966ea030 x0 : 0000000000000001
[ 8.908698] Call trace:
[ 8.910278] __alloc_pages_nodemask+0x540/0x694
[ 8.913278] alloc_pages_current+0xe0/0x17c
[ 8.915967] kmalloc_order+0x48/0xec
[ 8.918325] kmalloc_order_trace+0x54/0x21c
[ 8.921165] __kmalloc+0x454/0x5c0
[ 8.923368] kmalloc_array.constprop.0+0x30/0x50
[ 8.926301] gcov_info_dup+0x98/0x2c0
[ 8.928557] remove_info+0x1e0/0x244
[ 8.930876] gcov_event+0xfc/0x170
[ 8.933097] gcov_module_notifier+0x164/0x174
[ 8.935848] notifier_call_chain+0xa0/0x110
[ 8.938435] blocking_notifier_call_chain+0x80/0xe0
[ 8.941579] do_init_module+0x360/0x43c
[ 8.944198] load_module+0x8fc/0xa50
[ 8.946591] __do_sys_finit_module+0x190/0x1c0
[ 8.949485] __arm64_sys_finit_module+0x48/0x64
[ 8.952376] invoke_syscall+0x74/0x150
[ 8.954901] el0_svc_common.constprop.0+0x94/0x264
[ 8.956405] sr 0:0:0:0: Power-on or device reset occurred
[ 8.957610] do_el0_svc+0x5c/0x7c
[ 8.960983] sr 0:0:0:0: [sr0] scsi3-mmc drive: 16x/50x cd/rw xa/form2 cdda tray
[ 8.962169] el0_svc+0x70/0x114
[ 8.965694] cdrom: Uniform CD-ROM driver Revision: 3.20
[ 8.967253] el0_sync_handler+0x140/0x39c
[ 8.971738] el0_sync+0x17c/0x180
[ 8.973450] ---[ end trace 267579295e47a82a ]---
[ 8.976042] gcov: could not save data for '/home/cking/unstable/debian/build/build-generic/drivers/net/fjes/fjes_debugfs.gcda' (out of memory)
[ ...

Ah, earlier on boot I'm seeing:
[    8.808508] virtio_blk virtio3: [vda] 209715200 512-byte logical blocks (107 GB/100 GiB)
[    8.808649] ------------[ cut here ]------------
[    8.815777] vda: detected capacity change from 0 to 107374182400
[    8.816623] WARNING: CPU: 3 PID: 212 at mm/page_alloc.c:4813 __alloc_pages_nodemask+0x540/0x694
[    8.816630] Modules linked in: net_failover virtio_blk(+) xhci_pci_renesas virtio_scsi(+) failover fjes(-) aes_neon_bs aes_neon_blk aes_ce_blk crypto_s
imd cryptd aes_ce_cipher
[    8.837701] CPU: 3 PID: 212 Comm: systemd-udevd Not tainted 5.8.0-8-generic #9
[    8.842236] Hardware name: QEMU KVM Virtual Machine, BIOS 0.0.0 02/06/2015
[    8.846585] pstate: 20400005 (nzCv daif +PAN -UAO BTYPE=--)
[    8.850112] pc : __alloc_pages_nodemask+0x540/0x694
[    8.853106] lr : alloc_pages_current+0xe0/0x17c
[    8.856024] sp : ffff8000106138c0
[    8.858175] x29: ffff8000106138c0 x28: ffff000170252dc0 
[    8.861565] x27: 0000000000000000 x26: 0000000000000015 
[    8.865006] x25: 00000001abcfef80 x24: 0000000000000015 
[    8.868466] x23: ffff000170252dc0 x22: 0000000000000000 
[    8.871794] x21: ffffdb2796703050 x20: 0000000000040dc0 
[    8.875143] x19: ffffdb2796703250 x18: 0000000000000000 
[    8.878529] x17: 0000000000000000 x16: 0000000000000000 
[    8.881917] x15: 0000000000000000 x14: 73656a662f74656e 
[    8.885218] x13: 2f73726576697264 x12: 2f636972656e6567 
[    8.888554] x11: 2d646c6975622f64 x10: 6c6975622f6e6169 
[    8.892032] x9 : ffffdb2792b6dfa4 x8 : 63672e7366677562 
[    8.895415] x7 : 65645f73656a662f x6 : ffff0001558ef353 
[    8.898814] x5 : 0000000000000018 x4 : 0000000000000dd5 
[    8.902124] x3 : ffffdb27966ea138 x2 : 0000000000000001 
[    8.905418] x1 : ffffdb27966ea030 x0 : 0000000000000001 
[    8.908698] Call trace:
[    8.910278]  __alloc_pages_nodemask+0x540/0x694
[    8.913278]  alloc_pages_current+0xe0/0x17c
[    8.915967]  kmalloc_order+0x48/0xec
[    8.918325]  kmalloc_order_trace+0x54/0x21c
[    8.921165]  __kmalloc+0x454/0x5c0
[    8.923368]  kmalloc_array.constprop.0+0x30/0x50
[    8.926301]  gcov_info_dup+0x98/0x2c0
[    8.928557]  remove_info+0x1e0/0x244
[    8.930876]  gcov_event+0xfc/0x170
[    8.933097]  gcov_module_notifier+0x164/0x174
[    8.935848]  notifier_call_chain+0xa0/0x110
[    8.938435]  blocking_notifier_call_chain+0x80/0xe0
[    8.941579]  do_init_module+0x360/0x43c
[    8.944198]  load_module+0x8fc/0xa50
[    8.946591]  __do_sys_finit_module+0x190/0x1c0
[    8.949485]  __arm64_sys_finit_module+0x48/0x64
[    8.952376]  invoke_syscall+0x74/0x150
[    8.954901]  el0_svc_common.constprop.0+0x94/0x264
[    8.956405] sr 0:0:0:0: Power-on or device reset occurred
[    8.957610]  do_el0_svc+0x5c/0x7c
[    8.960983] sr 0:0:0:0: [sr0] scsi3-mmc drive: 16x/50x cd/rw xa/form2 cdda tray
[    8.962169]  el0_svc+0x70/0x114
[    8.965694] cdrom: Uniform CD-ROM driver Revision: 3.20
[    8.967253]  el0_sync_handler+0x140/0x39c
[    8.971738]  el0_sync+0x17c/0x180
[    8.973450] ---[ end trace 267579295e47a82a ]---
[    8.976042] gcov: could not save data for '/home/cking/unstable/debian/build/build-generic/drivers/net/fjes/fjes_debugfs.gcda' (out of memory)
[    8.986263] gcov: could not save data for '/home/cking/unstable/debian/build/build-generic/drivers/net/fjes/fjes_trace.gcda' (out of memory)
[    8.996162] gcov: could not save data for '/home/cking/unstable/debian/build/build-generic/drivers/net/fjes/fjes_ethtool.gcda' (out of memory)
[    9.006231] gcov: could not save data for '/home/cking/unstable/debian/build/build-generic/drivers/net/fjes/fjes_hw.gcda' (out of memory)
[    9.010491] sr 0:0:0:0: Attached scsi CD-ROM sr0
[    9.013246] sr 0:0:0:0: Attached scsi generic sg0 type 5
[    9.014959] gcov: could not save data for '/home/cking/unstable/debian/build/build-generic/drivers/net/fjes/fjes_main.gcda' (out of memory)

Revision history for this message

In Linux Kernel Bug Tracker #208885, colin.king (colin.king-linux-kernel-bugs) wrote on 2020-08-12:

Download full text (3.8 KiB)

Just spotted that earlier in the boot we get:

[ 8.808508] virtio_blk virtio3: [vda] 209715200 512-byte logical blocks (107 GB/100 GiB)
[ 8.808649] ------------[ cut here ]------------
[ 8.815777] vda: detected capacity change from 0 to 107374182400
[ 8.816623] WARNING: CPU: 3 PID: 212 at mm/page_alloc.c:4813 __alloc_pages_nodemask+0x540/0x694
[ 8.816630] Modules linked in: net_failover virtio_blk(+) xhci_pci_renesas virtio_scsi(+) failover fjes(-) aes_neon_bs aes_neon_blk aes_ce_blk crypto_s
imd cryptd aes_ce_cipher
[ 8.837701] CPU: 3 PID: 212 Comm: systemd-udevd Not tainted 5.8.0-8-generic #9
[ 8.842236] Hardware name: QEMU KVM Virtual Machine, BIOS 0.0.0 02/06/2015
[ 8.846585] pstate: 20400005 (nzCv daif +PAN -UAO BTYPE=--)
[ 8.850112] pc : __alloc_pages_nodemask+0x540/0x694
[ 8.853106] lr : alloc_pages_current+0xe0/0x17c
[ 8.856024] sp : ffff8000106138c0
[ 8.858175] x29: ffff8000106138c0 x28: ffff000170252dc0
[ 8.861565] x27: 0000000000000000 x26: 0000000000000015
[ 8.865006] x25: 00000001abcfef80 x24: 0000000000000015
[ 8.868466] x23: ffff000170252dc0 x22: 0000000000000000
[ 8.871794] x21: ffffdb2796703050 x20: 0000000000040dc0
[ 8.875143] x19: ffffdb2796703250 x18: 0000000000000000
[ 8.878529] x17: 0000000000000000 x16: 0000000000000000
[ 8.881917] x15: 0000000000000000 x14: 73656a662f74656e
[ 8.885218] x13: 2f73726576697264 x12: 2f636972656e6567
[ 8.888554] x11: 2d646c6975622f64 x10: 6c6975622f6e6169
[ 8.892032] x9 : ffffdb2792b6dfa4 x8 : 63672e7366677562
[ 8.895415] x7 : 65645f73656a662f x6 : ffff0001558ef353
[ 8.898814] x5 : 0000000000000018 x4 : 0000000000000dd5
[ 8.902124] x3 : ffffdb27966ea138 x2 : 0000000000000001
[ 8.905418] x1 : ffffdb27966ea030 x0 : 0000000000000001
[ 8.908698] Call trace:
[ 8.910278] __alloc_pages_nodemask+0x540/0x694
[ 8.913278] alloc_pages_current+0xe0/0x17c
[ 8.915967] kmalloc_order+0x48/0xec
[ 8.918325] kmalloc_order_trace+0x54/0x21c
[ 8.921165] __kmalloc+0x454/0x5c0
[ 8.923368] kmalloc_array.constprop.0+0x30/0x50
[ 8.926301] gcov_info_dup+0x98/0x2c0
[ 8.928557] remove_info+0x1e0/0x244
[ 8.930876] gcov_event+0xfc/0x170
[ 8.933097] gcov_module_notifier+0x164/0x174
[ 8.935848] notifier_call_chain+0xa0/0x110
[ 8.938435] blocking_notifier_call_chain+0x80/0xe0
[ 8.941579] do_init_module+0x360/0x43c
[ 8.944198] load_module+0x8fc/0xa50
[ 8.946591] __do_sys_finit_module+0x190/0x1c0
[ 8.949485] __arm64_sys_finit_module+0x48/0x64
[ 8.952376] invoke_syscall+0x74/0x150
[ 8.954901] el0_svc_common.constprop.0+0x94/0x264
[ 8.956405] sr 0:0:0:0: Power-on or device reset occurred
[ 8.957610] do_el0_svc+0x5c/0x7c
[ 8.960983] sr 0:0:0:0: [sr0] scsi3-mmc drive: 16x/50x cd/rw xa/form2 cdda tray
[ 8.962169] el0_svc+0x70/0x114
[ 8.965694] cdrom: Uniform CD-ROM driver Revision: 3.20
[ 8.967253] el0_sync_handler+0x140/0x39c
[ 8.971738] el0_sync+0x17c/0x180
[ 8.973450] ---[ end trace 267579295e47a82a ]---
[ 8.976042] gcov: could not save data for '/home/cking/unstable/debian/build/build-generic/drivers/net/fjes/fjes_debugfs.gcda' (out ...

Just spotted that earlier in the boot we get:

[    8.808508] virtio_blk virtio3: [vda] 209715200 512-byte logical blocks (107 GB/100 GiB)
[    8.808649] ------------[ cut here ]------------
[    8.815777] vda: detected capacity change from 0 to 107374182400
[    8.816623] WARNING: CPU: 3 PID: 212 at mm/page_alloc.c:4813 __alloc_pages_nodemask+0x540/0x694
[    8.816630] Modules linked in: net_failover virtio_blk(+) xhci_pci_renesas virtio_scsi(+) failover fjes(-) aes_neon_bs aes_neon_blk aes_ce_blk crypto_s
imd cryptd aes_ce_cipher
[    8.837701] CPU: 3 PID: 212 Comm: systemd-udevd Not tainted 5.8.0-8-generic #9
[    8.842236] Hardware name: QEMU KVM Virtual Machine, BIOS 0.0.0 02/06/2015
[    8.846585] pstate: 20400005 (nzCv daif +PAN -UAO BTYPE=--)
[    8.850112] pc : __alloc_pages_nodemask+0x540/0x694
[    8.853106] lr : alloc_pages_current+0xe0/0x17c
[    8.856024] sp : ffff8000106138c0
[    8.858175] x29: ffff8000106138c0 x28: ffff000170252dc0 
[    8.861565] x27: 0000000000000000 x26: 0000000000000015 
[    8.865006] x25: 00000001abcfef80 x24: 0000000000000015 
[    8.868466] x23: ffff000170252dc0 x22: 0000000000000000 
[    8.871794] x21: ffffdb2796703050 x20: 0000000000040dc0 
[    8.875143] x19: ffffdb2796703250 x18: 0000000000000000 
[    8.878529] x17: 0000000000000000 x16: 0000000000000000 
[    8.881917] x15: 0000000000000000 x14: 73656a662f74656e 
[    8.885218] x13: 2f73726576697264 x12: 2f636972656e6567 
[    8.888554] x11: 2d646c6975622f64 x10: 6c6975622f6e6169 
[    8.892032] x9 : ffffdb2792b6dfa4 x8 : 63672e7366677562 
[    8.895415] x7 : 65645f73656a662f x6 : ffff0001558ef353 
[    8.898814] x5 : 0000000000000018 x4 : 0000000000000dd5 
[    8.902124] x3 : ffffdb27966ea138 x2 : 0000000000000001 
[    8.905418] x1 : ffffdb27966ea030 x0 : 0000000000000001 
[    8.908698] Call trace:
[    8.910278]  __alloc_pages_nodemask+0x540/0x694
[    8.913278]  alloc_pages_current+0xe0/0x17c
[    8.915967]  kmalloc_order+0x48/0xec
[    8.918325]  kmalloc_order_trace+0x54/0x21c
[    8.921165]  __kmalloc+0x454/0x5c0
[    8.923368]  kmalloc_array.constprop.0+0x30/0x50
[    8.926301]  gcov_info_dup+0x98/0x2c0
[    8.928557]  remove_info+0x1e0/0x244
[    8.930876]  gcov_event+0xfc/0x170
[    8.933097]  gcov_module_notifier+0x164/0x174
[    8.935848]  notifier_call_chain+0xa0/0x110
[    8.938435]  blocking_notifier_call_chain+0x80/0xe0
[    8.941579]  do_init_module+0x360/0x43c
[    8.944198]  load_module+0x8fc/0xa50
[    8.946591]  __do_sys_finit_module+0x190/0x1c0
[    8.949485]  __arm64_sys_finit_module+0x48/0x64
[    8.952376]  invoke_syscall+0x74/0x150
[    8.954901]  el0_svc_common.constprop.0+0x94/0x264
[    8.956405] sr 0:0:0:0: Power-on or device reset occurred
[    8.957610]  do_el0_svc+0x5c/0x7c
[    8.960983] sr 0:0:0:0: [sr0] scsi3-mmc drive: 16x/50x cd/rw xa/form2 cdda tray
[    8.962169]  el0_svc+0x70/0x114
[    8.965694] cdrom: Uniform CD-ROM driver Revision: 3.20
[    8.967253]  el0_sync_handler+0x140/0x39c
[    8.971738]  el0_sync+0x17c/0x180
[    8.973450] ---[ end trace 267579295e47a82a ]---
[    8.976042] gcov: could not save data for '/home/cking/unstable/debian/build/build-generic/drivers/net/fjes/fjes_debugfs.gcda' (out of memory)
[    8.986263] gcov: could not save data for '/home/cking/unstable/debian/build/build-generic/drivers/net/fjes/fjes_trace.gcda' (out of memory)
[    8.996162] gcov: could not save data for '/home/cking/unstable/debian/build/build-generic/drivers/net/fjes/fjes_ethtool.gcda' (out of memory)
[    9.006231] gcov: could not save data for '/home/cking/unstable/debian/build/build-generic/drivers/net/fjes/fjes_hw.gcda' (out of memory)
[    9.010491] sr 0:0:0:0: Attached scsi CD-ROM sr0
[    9.013246] sr 0:0:0:0: Attached scsi generic sg0 type 5
[    9.014959] gcov: could not save data for '/home/cking/unstable/debian/build/build-generic/drivers/net/fjes/fjes_main.gcda' (out of memory)

Revision history for this message

In Linux Kernel Bug Tracker #208885, colin.king (colin.king-linux-kernel-bugs) wrote on 2020-08-12:

I upped the VM memory to 16GB and reduced the CPU count to 1 CPU and still hit the out of memory condition with gcov.

Bug Watch Updater (bug-watch-updater) on 2020-08-12

Changed in linux:
status:	Unknown → Confirmed

Revision history for this message

Colin Ian King (colin-king) wrote on 2020-09-03:

This is due to using gcc-10.2. Building with gcc-9 is fine. This compiler support for GCOV will be disabled, see https://lkml.org/lkml/2020/9/2/934

So, marking this as Won't Fix because there is a workaround and 10.2 is not looking favourably for GCOV support at the moment.

Changed in linux (Ubuntu):
status:	In Progress → Won't Fix

Revision history for this message

Colin Ian King (colin-king) wrote on 2020-09-14:

Upstream fix 40249c6962075c040fd071339acae524f18bfac9, this has already been picked up by Sash Levin for 5.8, 5.4, 4.19, 4.14, 4.9 and 4.8 on backport stable AUTOSEL. Lets wait for that fix to trickle into the SRU process.

Changed in linux (Ubuntu):
status:	Won't Fix → In Progress

Revision history for this message

Colin Ian King (colin-king) wrote on 2020-10-09:

Fix applied in risc-v groovy with commit 4fc484ffd959e0d897d073296cfcfafdf473e407

Changed in linux (Ubuntu):
status:	In Progress → Fix Released

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arm64 gcov in 5.8 breaks when trying to enable it

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