bisecting fixing commit since c98875d930e915d01e8c40c7d3c16f00b3c8abe1 building syzkaller on 53199d6e8aee5f0ebd3775d2b1c674f4e6e64e2b testing commit c98875d930e915d01e8c40c7d3c16f00b3c8abe1 with gcc (GCC) 8.1.0 kernel signature: a651d49f7dfa58c209d8e3e3c819fc68937b9294 all runs: crashed: WARNING in __vm_enough_memory testing current HEAD 14260788bbb9c94b0e36abc17294266b69dd46e4 testing commit 14260788bbb9c94b0e36abc17294266b69dd46e4 with gcc (GCC) 8.1.0 kernel signature: b0bca3545d74a96e2551695295a831b2d9a46b6e all runs: crashed: WARNING in __vm_enough_memory revisions tested: 2, total time: 23m28.725372982s (build: 16m10.680784367s, test: 6m30.062006159s) the crash still happens on HEAD commit msg: Linux 4.19.86 crash: WARNING in __vm_enough_memory IPv6: ADDRCONF(NETDEV_CHANGE): veth1_to_bond: link becomes ready ------------[ cut here ]------------ IPv6: ADDRCONF(NETDEV_CHANGE): veth1_to_team: link becomes ready memory commitment underflow IPv6: ADDRCONF(NETDEV_CHANGE): team_slave_1: link becomes ready WARNING: CPU: 1 PID: 7069 at mm/util.c:652 __vm_enough_memory+0x3c3/0x4b0 mm/util.c:650 IPv6: ADDRCONF(NETDEV_CHANGE): veth1_to_team: link becomes ready Kernel panic - not syncing: panic_on_warn set ... IPv6: ADDRCONF(NETDEV_CHANGE): team_slave_1: link becomes ready CPU: 1 PID: 7069 Comm: syz-executor.2 Not tainted 4.19.86-syzkaller #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 Call Trace: __dump_stack lib/dump_stack.c:77 [inline] dump_stack+0x123/0x177 lib/dump_stack.c:118 panic+0x1cd/0x387 kernel/panic.c:186 __warn.cold.8+0x1b/0x3c kernel/panic.c:541 report_bug+0x1a4/0x200 lib/bug.c:186 IPv6: ADDRCONF(NETDEV_UP): veth0_to_team: link is not ready fixup_bug arch/x86/kernel/traps.c:178 [inline] do_error_trap+0x200/0x350 arch/x86/kernel/traps.c:296 IPv6: ADDRCONF(NETDEV_UP): veth0_to_hsr: link is not ready do_invalid_op+0x1b/0x20 arch/x86/kernel/traps.c:316 invalid_op+0x14/0x20 arch/x86/entry/entry_64.S:1037 RIP: 0010:__vm_enough_memory+0x3c3/0x4b0 mm/util.c:650 Code: ea 02 48 29 d0 e9 3b ff ff ff 80 3d 3d f9 2a 07 00 0f 85 ec fc ff ff 48 c7 c7 e0 79 d1 86 c6 05 29 f9 2a 07 01 e8 90 75 b7 ff <0f> 0b 48 b8 00 00 00 00 00 fc ff df 48 89 da 48 c1 ea 03 0f b6 14 RSP: 0018:ffff88808f7a7a98 EFLAGS: 00010286 RAX: 0000000000000000 RBX: ffffffff8801b200 RCX: 0000000000000000 RDX: 0000000000000004 RSI: ffffffff86fe20a0 RDI: ffffffff89a806a0 RBP: ffff88808f7a7ad0 R08: ffffed1015d65079 R09: ffffed1015d65078 R10: ffffed1015d65078 R11: ffff8880aeb283c7 R12: fff8000000000000 R13: ffff8880a832a980 R14: 0000000000000001 R15: fff8000000012588 security_vm_enough_memory_mm+0x78/0xa0 security/security.c:338 shmem_acct_size mm/shmem.c:150 [inline] __shmem_file_setup.part.46+0x150/0x280 mm/shmem.c:3948 __shmem_file_setup mm/shmem.c:3991 [inline] shmem_file_setup+0x2c/0x40 mm/shmem.c:3992 ashmem_mmap+0x2cc/0x450 drivers/staging/android/ashmem.c:388 call_mmap include/linux/fs.h:1825 [inline] mmap_region+0x9bc/0x1480 mm/mmap.c:1763 do_mmap+0x6b5/0xea0 mm/mmap.c:1536 do_mmap_pgoff include/linux/mm.h:2314 [inline] vm_mmap_pgoff+0x195/0x210 mm/util.c:357 ksys_mmap_pgoff+0x3c6/0x650 mm/mmap.c:1586 __do_sys_mmap arch/x86/kernel/sys_x86_64.c:100 [inline] __se_sys_mmap arch/x86/kernel/sys_x86_64.c:91 [inline] __x64_sys_mmap+0xe9/0x1b0 arch/x86/kernel/sys_x86_64.c:91 do_syscall_64+0xd6/0x4e0 arch/x86/entry/common.c:293 entry_SYSCALL_64_after_hwframe+0x49/0xbe RIP: 0033:0x458c29 Code: ad b8 fb ff c3 66 2e 0f 1f 84 00 00 00 00 00 66 90 48 89 f8 48 89 f7 48 89 d6 48 89 ca 4d 89 c2 4d 89 c8 4c 8b 4c 24 08 0f 05 <48> 3d 01 f0 ff ff 0f 83 7b b8 fb ff c3 66 2e 0f 1f 84 00 00 00 00 RSP: 002b:00007ff3dba4cc78 EFLAGS: 00000246 ORIG_RAX: 0000000000000009 RAX: ffffffffffffffda RBX: 0000000000000006 RCX: 0000000000458c29 RDX: 0000000000000000 RSI: 0000000000001000 RDI: 0000000020ffc000 RBP: 000000000073bf00 R08: 0000000000000003 R09: 0000000000000000 R10: 0080000000000012 R11: 0000000000000246 R12: 00007ff3dba4d6d4 R13: 00000000004c4b5a R14: 00000000004d8780 R15: 00000000ffffffff Kernel Offset: disabled Rebooting in 86400 seconds..