Hi,

for me this problem persists in 4.9.0 (compiled myself, on debian8).  It's reproducible: create new empty filesystem, add files, delete files --> leading to a segfault and unrecoverable corruption of the filesystem.  I tried this on two different hard drives, so I would exclude the possibility of a hardware failure.

see attached part of kern.log.

cheers, lukas


Jan  9 14:33:00 debianPro kernel: [  338.991315] hfsplus: trying to free free bnode 0(1)
Jan  9 14:33:00 debianPro kernel: [  338.991320] hfsplus: trying to free free bnode 0(1)
Jan  9 14:33:00 debianPro kernel: [  338.991329] hfsplus: trying to free free bnode 0(1)
Jan  9 14:33:00 debianPro kernel: [  338.991349] general protection fault: 0000 [#1] SMP
Jan  9 14:33:00 debianPro kernel: [  338.991374] Modules linked in: bnep binfmt_misc dm_crypt af_alg nls_iso8859_1 nls_cp437 vfat fat btusb btrtl btbcm btintel nls_utf8 hfsplus bluetooth input_leds arc4 hid_generic hid_apple ssb bcm5974 mac80211 cfg80211 usbhid hid applesmc input_polldev iTCO_wdt iTCO_vendor_support x86_pkg_temp_thermal coretemp kvm_intel kvm irqbypass ghash_clmulni_intel aesni_intel aes_x86_64 ablk_helper cryptd lrw glue_helper uvcvideo videobuf2_vmalloc videobuf2_memops snd_pcsp videobuf2_v4l2 videobuf2_core videodev i2c_i801 i2c_smbus bcma snd_hda_codec_hdmi snd_hda_codec_cirrus thunderbolt snd_hda_codec_generic i915 fbcon bitblit softcursor tileblit intel_gtt snd_hda_intel apple_gmux snd_hda_codec snd_hda_core drm_kms_helper snd_hwdep snd_pcm_oss drm snd_mixer_oss snd_pcm video i2c_algo_bit fb_sys_fops snd_timer
Jan  9 14:33:00 debianPro kernel: [  338.991744]  syscopyarea snd sysfillrect apple_bl sysimgblt soundcore tpm_tis lpc_ich shpchp tpm_tis_core tpm firewire_sbp2 fuse ppdev lp parport crc32c_intel firewire_ohci firewire_core crc_itu_t sdhci_pci sdhci led_class ahci tg3 ptp libahci pps_core xhci_pci xhci_hcd [last unloaded: b43]
Jan  9 14:33:00 debianPro kernel: [  338.991885] CPU: 1 PID: 6238 Comm: rm Not tainted 4.9.0 #1
Jan  9 14:33:00 debianPro kernel: [  338.991908] Hardware name: Apple Inc. MacBookPro9,2/Mac-6F01561E16C75D06, BIOS MBP91.88Z.00D3.B0C.1509111653 09/11/2015
Jan  9 14:33:00 debianPro kernel: [  338.991950] task: ffff88042df2d780 task.stack: ffffc90008e04000
Jan  9 14:33:00 debianPro kernel: [  338.991973] RIP: 0010:[<ffffffffa0dad78c>]  [<ffffffffa0dad78c>] hfsplus_bnode_write+0x94/0x115 [hfsplus]
Jan  9 14:33:00 debianPro kernel: [  338.992014] RSP: 0018:ffffc90008e07c00  EFLAGS: 00010286
Jan  9 14:33:00 debianPro kernel: [  338.992035] RAX: ffff880000000000 RBX: 0000000000000002 RCX: 0000000000000002
Jan  9 14:33:00 debianPro kernel: [  338.992063] RDX: 0000160000000000 RSI: ffffc90008e07c56 RDI: ffe7091333456000
Jan  9 14:33:00 debianPro kernel: [  338.992090] RBP: ffffc90008e07c40 R08: ffffc90008e07c24 R09: ffff88044ccd10d0
Jan  9 14:33:00 debianPro kernel: [  338.992118] R10: ffffea0011333440 R11: 0000000000000000 R12: ffe7091333456000
Jan  9 14:33:00 debianPro kernel: [  338.992146] R13: ffff88044ccd1120 R14: 0000000000000002 R15: ffe7091333456000
Jan  9 14:33:00 debianPro kernel: [  338.992175] FS:  00007f018ffbb700(0000) GS:ffff88046f280000(0000) knlGS:0000000000000000
Jan  9 14:33:00 debianPro kernel: [  338.992206] CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
Jan  9 14:33:00 debianPro kernel: [  338.992229] CR2: 0000000000c7c118 CR3: 000000045c8ec000 CR4: 00000000001406e0
Jan  9 14:33:00 debianPro kernel: [  338.992257] Stack:
Jan  9 14:33:00 debianPro kernel: [  338.992268]  ffff88044ccd10d0 0000160000000000 ffffc90008e07c56 ffff88044ccd10c0
Jan  9 14:33:00 debianPro kernel: [  338.992304]  ffffc90008e07ce0 0000000000001ffc 0000000000000048 0000000000001ff4
Jan  9 14:33:00 debianPro kernel: [  338.992340]  ffffc90008e07c58 ffffffffa0dad82f c6ff00000000000e ffffc90008e07c98
Jan  9 14:33:00 debianPro kernel: [  338.992374] Call Trace:
Jan  9 14:33:00 debianPro kernel: [  338.992389]  [<ffffffffa0dad82f>] hfsplus_bnode_write_u16+0x22/0x24 [hfsplus]
Jan  9 14:33:00 debianPro kernel: [  338.992421]  [<ffffffffa0daf5f8>] hfsplus_brec_remove+0x10d/0x15b [hfsplus]
Jan  9 14:33:00 debianPro kernel: [  338.992453]  [<ffffffffa0db147d>] __hfsplus_delete_attr+0x99/0xc0 [hfsplus]
Jan  9 14:33:00 debianPro kernel: [  338.992481]  [<ffffffffa0db192b>] hfsplus_delete_all_attrs+0x8b/0xa7 [hfsplus]
Jan  9 14:33:00 debianPro kernel: [  338.992510]  [<ffffffffa0daba3e>] hfsplus_delete_cat+0x297/0x2ba [hfsplus]
Jan  9 14:33:00 debianPro kernel: [  338.992539]  [<ffffffffa0dac1f6>] hfsplus_unlink+0xdc/0x19e [hfsplus]
Jan  9 14:33:00 debianPro kernel: [  338.992566]  [<ffffffff81166acf>] ? __inode_permission+0x82/0xa4
Jan  9 14:33:00 debianPro kernel: [  338.992590]  [<ffffffff81166ddf>] vfs_unlink+0xe1/0x172
Jan  9 14:33:00 debianPro kernel: [  338.992612]  [<ffffffff8116a34a>] do_unlinkat+0x10e/0x218
Jan  9 14:33:00 debianPro kernel: [  338.992635]  [<ffffffff8116ba45>] SyS_unlinkat+0x29/0x2b
Jan  9 14:33:00 debianPro kernel: [  338.992657]  [<ffffffff81582f20>] entry_SYSCALL_64_fastpath+0x13/0x94
Jan  9 14:33:00 debianPro kernel: [  338.992683] Code: 00 00 00 00 00 88 ff ff 48 8b 75 d0 49 01 d7 4c 8b 4d c0 48 63 cb 49 c1 ff 06 48 89 55 c8 49 c1 e7 0c 49 01 c7 4d 01 fc 4c 89 e7 <f3> a4 49 8b 79 50 e8 a1 6e 36 e0 48 8b 55 c8 49 89 d7 41 29 de 
Jan  9 14:33:00 debianPro kernel: [  338.992850] RIP  [<ffffffffa0dad78c>] hfsplus_bnode_write+0x94/0x115 [hfsplus]
Jan  9 14:33:00 debianPro kernel: [  338.992881]  RSP <ffffc90008e07c00>
Jan  9 14:33:00 debianPro kernel: [  338.999072] ---[ end trace 2584710f1bb4e660 ]---