Comment 8 for bug 1764246

I got the same behavior on Xenial with kernel 4.15.0-43-generic.

[ 4.598980] [ pid ] uid tgid total_vm rss pgtables_bytes swapents oom_score_adj name
[ 4.601946] Kernel panic - not syncing: Out of memory and no killable processes...
[ 4.601946]
[ 4.605054] CPU: 0 PID: 1 Comm: swapper/0 Not tainted 4.15.0-43-generic #46~16.04.1-Ubuntu
[ 4.605943] Hardware name: HP ProLiant BL460c Gen9, BIOS I36 10/17/2018
[ 4.605943] Call Trace:
[ 4.605943] dump_stack+0x63/0x8b
[ 4.605943] panic+0xe4/0x244
[ 4.60header+0x18f/0x285
[ 4.605943] out_of_memory+0x364/0x4c0
[ 4.605943] __alloc_pages_slowpath+0xda2/0xe90
[ 4.605943] ? radix_tree_extend+0xda/0x160
[ 4.605943] __alloc_pages_nodemask+0x265/0x280
[ 4.605943] alloc_page_interleave+0x17/0x80
[ 4.605943] alloc_pages_current+0xc8/0xe0
[ 4.605943] __page_cache_alloc+0x86/0x90
[ 4.605943] pagecache_get_page+0x88/0x2c0
[ 4.605943] grab_cache_page_write_begin+0x23/0x40
[ 4.605943] simple_write_begin+0x29/0x1b0
[ 4.605943] generic_perform_write+0xba/0x1b0
[ 4.605943] __generic_file_write_iter+0x1a6/0x1f0
[ 4.605943] ? md_run_setup+0x99/0x99
[ 4.605943] generic_file_write_iter+0xf1/0x1d0
[ 4.605943] new_sync_write+0xe5/0x140
[ 4.605943] __vfs_write+0x29/0x40
[ 4.605943] vfs_write+0xb8/0x1b0
[ 4.605943] ? zlib_updatewindow+0x2d/0xd0
[ 4.605943] ? md_run_setup+0x99/0x99
[ 4.605943] SyS_write+0x55/0xc0
[ 4.605943] xwrite+0x2e/0x61
[ 4.605943] do_copy+0x8f/0xbd
[ 4.605943] write_buffer+0x2b/0x3c
[ 4.605943] flush_buffer+0x30/0x8a
[ 4.605943] __gunzip+0x27e/0x322
[ 4.605943] ? bunzip2+0x3a05943] ? write_buffer+0x3c/0x3c
[ 4.605943] ? __gunzip+0x322/0x322
[ 4.605943] gunzip+0x11/0x13
[ 4.605943] ? md_run_setup+0x99/0x99
[ 4.605943] unpack_to_rootfs+0x168/0x2bb
[ 4.605943] ? md_run_setup+0x99/0x99
[ 4.605943] ? unpack_to_rootfs+0x2bb/0x2bb
[ 4.605943] populate_rootfs+0x61/0x10f
[ 4.605943] do_one_initcall+0x55/0x1ac
[ 4.605943] kernel_init_freeable+0x19e/0x238
[ 4.605943] ? rest_init+0xb0/0xb0
[ 4.605943] kernel_init+0xe/0x110
[ 4.605943] ret_from_fork+0x35/0x40
[ 4.605943] ---[ end Kernel panic - not syncing: Out of memory and no killable processes...
[ 4.605943]