kasan: CONFIG_KASAN_INLINE enabled kasan: GPF could be caused by NULL-ptr deref or user memory access general protection fault: 0000 [#1] SMP KASAN Dumping ftrace buffer: (ftrace buffer empty) Modules linked in: CPU: 1 PID: 3164 Comm: syz-executor2 Not tainted 4.15.0-rc3+ #224 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 RIP: 0010:proc_flush_task_mnt fs/proc/base.c:3027 [inline] RIP: 0010:proc_flush_task+0x282/0x680 fs/proc/base.c:3099 RSP: 0018:ffff8801c93ff3f8 EFLAGS: 00010246 RAX: 0000000000000000 RBX: dffffc0000000000 RCX: 0000000000000000 RDX: 0000000000000007 RSI: dffffc0000000000 RDI: ffff8801c93ff4ac RBP: ffff8801c93ff510 R08: 0000000000000000 R09: 1ffff1003927fe12 R10: 0000000000000500 R11: 0000000000000000 R12: ffff8801c93ff4a8 R13: 0000000000000000 R14: ffff8801c0c12900 R15: ffff8801c93ff4e8 FS: 0000000002896940(0000) GS:ffff8801db500000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 00007fff48f9d158 CR3: 00000001c7e91005 CR4: 00000000001606e0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 Call Trace: kasan: CONFIG_KASAN_INLINE enabled kasan: GPF could be caused by NULL-ptr deref or user memory access release_task+0x258/0x1a40 kernel/exit.c:195 wait_task_zombie kernel/exit.c:1161 [inline] wait_consider_task+0x2a10/0x3420 kernel/exit.c:1388 do_wait_thread kernel/exit.c:1451 [inline] do_wait+0x427/0xa70 kernel/exit.c:1522 kernel_wait4+0x1f5/0x370 kernel/exit.c:1665 SYSC_wait4+0x134/0x140 kernel/exit.c:1677 SyS_wait4+0x2c/0x40 kernel/exit.c:1673 entry_SYSCALL_64_fastpath+0x1f/0x96 RIP: 0033:0x40cdba RSP: 002b:00007fff48f9d148 EFLAGS: 00000246 ORIG_RAX: 000000000000003d RAX: ffffffffffffffda RBX: 0000000002896914 RCX: 000000000040cdba RDX: 0000000040000001 RSI: 00007fff48f9d16c RDI: ffffffffffffffff RBP: 0000000000004fe3 R08: 0000000000000001 R09: 0000000002896940 R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000004fe3 R13: 000000000000000d R14: 00000000000f83c4 R15: 0000000000000001 Code: 48 89 fa 48 c1 ea 03 0f b6 0c 1a 48 89 fa 83 e2 07 83 c2 03 38 ca 7c 08 84 c9 0f 85 7b 03 00 00 41 89 47 c4 4c 89 e8 48 c1 e8 03 <80> 3c 18 00 0f 85 59 03 00 00 49 8b 7d 00 4c 89 e6 e8 88 95 e7 RIP: proc_flush_task_mnt fs/proc/base.c:3027 [inline] RSP: ffff8801c93ff3f8 RIP: proc_flush_task+0x282/0x680 fs/proc/base.c:3099 RSP: ffff8801c93ff3f8 general protection fault: 0000 [#2] SMP KASAN ---[ end trace 29874269c9d5c326 ]--- Kernel panic - not syncing: Fatal exception Dumping ftrace buffer: (ftrace buffer empty) Modules linked in: CPU: 0 PID: 3152 Comm: syz-executor4 Tainted: G D 4.15.0-rc3+ #224 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 RIP: 0010:proc_flush_task_mnt fs/proc/base.c:3027 [inline] RIP: 0010:proc_flush_task+0x282/0x680 fs/proc/base.c:3099 RSP: 0018:ffff8801c7f373f8 EFLAGS: 00010246 RAX: 0000000000000000 RBX: dffffc0000000000 RCX: 0000000000000000 RDX: 0000000000000007 RSI: dffffc0000000000 RDI: ffff8801c7f374ac RBP: ffff8801c7f37510 R08: 0000000000000000 R09: 1ffff10038fe6e12 R10: 0000000000000500 R11: 0000000000000000 R12: ffff8801c7f374a8 R13: 0000000000000000 R14: ffff8801cab05700 R15: ffff8801c7f374e8 FS: 0000000001332940(0000) GS:ffff8801db400000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 00007ffeef0049b8 CR3: 00000001cf1d0004 CR4: 00000000001606f0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 Call Trace: release_task+0x258/0x1a40 kernel/exit.c:195 wait_task_zombie kernel/exit.c:1161 [inline] wait_consider_task+0x2a10/0x3420 kernel/exit.c:1388 do_wait_thread kernel/exit.c:1451 [inline] do_wait+0x427/0xa70 kernel/exit.c:1522 kernel_wait4+0x1f5/0x370 kernel/exit.c:1665 SYSC_wait4+0x134/0x140 kernel/exit.c:1677 SyS_wait4+0x2c/0x40 kernel/exit.c:1673 entry_SYSCALL_64_fastpath+0x1f/0x96 RIP: 0033:0x40cdba RSP: 002b:00007ffeef0049a8 EFLAGS: 00000246 ORIG_RAX: 000000000000003d RAX: ffffffffffffffda RBX: 0000000001332914 RCX: 000000000040cdba RDX: 0000000040000001 RSI: 00007ffeef0049cc RDI: ffffffffffffffff RBP: 0000000000004ffc R08: 0000000000000001 R09: 0000000001332940 R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000004ffc R13: 000000000000000d R14: 00000000000f844c R15: 0000000000000001 Code: 48 89 fa 48 c1 ea 03 0f b6 0c 1a 48 89 fa 83 e2 07 83 c2 03 38 ca 7c 08 84 c9 0f 85 7b 03 00 00 41 89 47 c4 4c 89 e8 48 c1 e8 03 <80> 3c 18 00 0f 85 59 03 00 00 49 8b 7d 00 4c 89 e6 e8 88 95 e7 RIP: proc_flush_task_mnt fs/proc/base.c:3027 [inline] RSP: ffff8801c7f373f8 RIP: proc_flush_task+0x282/0x680 fs/proc/base.c:3099 RSP: ffff8801c7f373f8 Dumping ftrace buffer: (ftrace buffer empty) Kernel Offset: disabled Rebooting in 86400 seconds..