kasan: CONFIG_KASAN_INLINE enabled
kasan: GPF could be caused by NULL-ptr deref or user memory access
general protection fault: 0000 [#1] PREEMPT SMP KASAN
kobject: 'loop3' (00000000b030992c): fill_kobj_path: path = '/devices/virtual/block/loop3'
CPU: 1 PID: 389 Comm: syz-executor5 Not tainted 4.20.0-rc7+ #381
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
RIP: 0010:put_pid.part.3+0x79/0x240 kernel/pid.c:108
Code: f1 f1 f1 f1 c7 40 04 04 f2 f2 f2 65 48 8b 04 25 28 00 00 00 48 89 45 d0 31 c0 e8 e2 c4 2c 00 48 8d 7b 04 48 89 f8 48 c1 e8 03 <42> 0f b6 14 20 48 89 f8 83 e0 07 83 c0 03 38 d0 7c 08 84 d2 0f 85
RSP: 0018:ffff8881881cf1f0 EFLAGS: 00010207
kobject: 'loop2' (00000000663f740f): kobject_uevent_env
RAX: 000000000836b156 RBX: 0000000041b58ab3 RCX: ffffffff833e490e
RDX: 0000000000000000 RSI: ffffffff8152bf8e RDI: 0000000041b58ab7
RBP: ffff8881881cf280 R08: ffff8881a2d32340 R09: fffff52003b80800
R10: fffff52003b80800 R11: ffffc9001dc04003 R12: dffffc0000000000
R13: 1ffff11031039e3f R14: ffff8881881cf258 R15: dffffc0000000000
FS:  0000000001fd2940(0000) GS:ffff8881daf00000(0000) knlGS:0000000000000000
kobject: 'loop2' (00000000663f740f): fill_kobj_path: path = '/devices/virtual/block/loop2'
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 0000000000a3fd98 CR3: 00000001d9793000 CR4: 00000000001406e0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Call Trace:
 put_pid+0x1f/0x30 kernel/pid.c:105
 ipc_update_pid ipc/util.h:159 [inline]
 freeary+0x10c8/0x1a40 ipc/sem.c:1167
kobject: 'loop0' (000000007d810a69): kobject_uevent_env
kobject: 'loop0' (000000007d810a69): fill_kobj_path: path = '/devices/virtual/block/loop0'
 free_ipcs+0x9f/0x1c0 ipc/namespace.c:112
 sem_exit_ns+0x20/0x40 ipc/sem.c:237
 free_ipc_ns ipc/namespace.c:120 [inline]
 put_ipc_ns+0x66/0x180 ipc/namespace.c:152
 free_nsproxy+0xcf/0x220 kernel/nsproxy.c:180
 switch_task_namespaces+0xb3/0xd0 kernel/nsproxy.c:229
 exit_task_namespaces+0x17/0x20 kernel/nsproxy.c:234
 do_exit+0x1ad1/0x26d0 kernel/exit.c:866
 do_group_exit+0x177/0x440 kernel/exit.c:970
 __do_sys_exit_group kernel/exit.c:981 [inline]
 __se_sys_exit_group kernel/exit.c:979 [inline]
 __x64_sys_exit_group+0x3e/0x50 kernel/exit.c:979
 do_syscall_64+0x1b9/0x820 arch/x86/entry/common.c:290
 entry_SYSCALL_64_after_hwframe+0x49/0xbe
RIP: 0033:0x457669
Code: fd b3 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 cb b3 fb ff c3 66 2e 0f 1f 84 00 00 00 00
RSP: 002b:0000000000a3fc88 EFLAGS: 00000246 ORIG_RAX: 00000000000000e7
RAX: ffffffffffffffda RBX: 0000000000000001 RCX: 0000000000457669
RDX: 0000000000411040 RSI: 0000000000a44bf0 RDI: 0000000000000045
RBP: 00000000004bd071 R08: 000000000000000c R09: 0000000000000000
R10: 0000000001fd2940 R11: 0000000000000246 R12: 0000000000000000
R13: 0000000000000001 R14: 0000000000000201 R15: 0000000000000005
Modules linked in:
---[ end trace 5314bfd993f915dc ]---
RIP: 0010:put_pid.part.3+0x79/0x240 kernel/pid.c:108
Code: f1 f1 f1 f1 c7 40 04 04 f2 f2 f2 65 48 8b 04 25 28 00 00 00 48 89 45 d0 31 c0 e8 e2 c4 2c 00 48 8d 7b 04 48 89 f8 48 c1 e8 03 <42> 0f b6 14 20 48 89 f8 83 e0 07 83 c0 03 38 d0 7c 08 84 d2 0f 85
RSP: 0018:ffff8881881cf1f0 EFLAGS: 00010207
kobject: 'loop3' (00000000b030992c): kobject_uevent_env
RAX: 000000000836b156 RBX: 0000000041b58ab3 RCX: ffffffff833e490e
RDX: 0000000000000000 RSI: ffffffff8152bf8e RDI: 0000000041b58ab7
kobject: 'loop3' (00000000b030992c): fill_kobj_path: path = '/devices/virtual/block/loop3'
RBP: ffff8881881cf280 R08: ffff8881a2d32340 R09: fffff52003b80800
R10: fffff52003b80800 R11: ffffc9001dc04003 R12: dffffc0000000000
R13: 1ffff11031039e3f R14: ffff8881881cf258 R15: dffffc0000000000
FS:  0000000001fd2940(0000) GS:ffff8881daf00000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 0000000000a3fd98 CR3: 000000000946a000 CR4: 00000000001406e0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400