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
CPU: 0 PID: 25016 Comm: syz-executor1 Not tainted 4.19.0-rc7+ #278
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
kobject: 'loop3' (00000000227cbbc8): kobject_uevent_env
RIP: 0010:memcmp+0x28/0x160 lib/string.c:856
Code: 00 00 48 85 d2 0f 84 0a 01 00 00 48 b8 00 00 00 00 00 fc ff df 55 48 89 f9 48 89 e5 48 c1 e9 03 41 54 53 48 89 fb 48 83 ec 18 <0f> b6 04 01 48 89 f9 83 e1 07 38 c8 7f 08 84 c0 0f 85 98 00 00 00
RSP: 0018:ffff8801c368ef98 EFLAGS: 00010292
kobject: 'loop3' (00000000227cbbc8): fill_kobj_path: path = '/devices/virtual/block/loop3'
RAX: dffffc0000000000 RBX: 1ffff100386d1e4f RCX: 03fffe20070da3c9
RDX: 0000000000000002 RSI: ffffffff883ba3c0 RDI: 1ffff100386d1e4f
RBP: ffff8801c368efc0 R08: ffff8801c5a284c0 R09: 0000000000000000
R10: ffffed00386d1e5a R11: 0000000000000000 R12: 0000000000000002
R13: ffffffff883ba3c0 R14: 1fff7901fbd6119f R15: dffffc0000000000
FS:  00007f54b7057700(0000) GS:ffff8801dae00000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 0000000000728000 CR3: 00000001ccd07000 CR4: 00000000001406f0
Call Trace:
 strnstr+0x4b/0x70 lib/string.c:934
 __aa_lookupn_ns+0xc1/0x570 security/apparmor/policy_ns.c:209
kobject: 'loop4' (000000006e344ac2): kobject_uevent_env
kobject: 'loop4' (000000006e344ac2): fill_kobj_path: path = '/devices/virtual/block/loop4'
 aa_lookupn_ns+0x88/0x1e0 security/apparmor/policy_ns.c:240
 aa_fqlookupn_profile+0x1b9/0x1010 security/apparmor/policy.c:468
kobject: 'loop5' (000000007afea02e): kobject_uevent_env
kobject: 'loop5' (000000007afea02e): fill_kobj_path: path = '/devices/virtual/block/loop5'
 fqlookupn_profile+0x80/0xc0 security/apparmor/label.c:1844
 aa_label_strn_parse+0xa3a/0x1230 security/apparmor/label.c:1908
 aa_label_parse+0x42/0x50 security/apparmor/label.c:1943
 aa_change_profile+0x513/0x3260 security/apparmor/domain.c:1362
kobject: 'loop5' (000000007afea02e): kobject_uevent_env
kobject: 'loop5' (000000007afea02e): fill_kobj_path: path = '/devices/virtual/block/loop5'
 apparmor_setprocattr+0xa8b/0x1150 security/apparmor/lsm.c:656
 security_setprocattr+0x66/0xc0 security/security.c:1298
 proc_pid_attr_write+0x301/0x540 fs/proc/base.c:2569
 __vfs_write+0x119/0x9f0 fs/read_write.c:485
 vfs_write+0x1fc/0x560 fs/read_write.c:549
 ksys_write+0x101/0x260 fs/read_write.c:598
kobject: 'loop5' (000000007afea02e): kobject_uevent_env
 __do_sys_write fs/read_write.c:610 [inline]
 __se_sys_write fs/read_write.c:607 [inline]
 __x64_sys_write+0x73/0xb0 fs/read_write.c:607
 do_syscall_64+0x1b9/0x820 arch/x86/entry/common.c:290
kobject: 'loop5' (000000007afea02e): fill_kobj_path: path = '/devices/virtual/block/loop5'
 entry_SYSCALL_64_after_hwframe+0x49/0xbe
RIP: 0033:0x457519
Code: 1d b4 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 eb b3 fb ff c3 66 2e 0f 1f 84 00 00 00 00
RSP: 002b:00007f54b7056c78 EFLAGS: 00000246 ORIG_RAX: 0000000000000001
RAX: ffffffffffffffda RBX: 0000000000000003 RCX: 0000000000457519
kobject: 'loop2' (00000000cd17ff1d): kobject_uevent_env
RDX: 00000000200000ec RSI: 00000000200000c0 RDI: 0000000000000003
RBP: 000000000072bf00 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 00007f54b70576d4
R13: 00000000004c54a1 R14: 00000000004d8da8 R15: 00000000ffffffff
Modules linked in:
kobject: 'loop2' (00000000cd17ff1d): fill_kobj_path: path = '/devices/virtual/block/loop2'
---[ end trace 6e4a34606c944f7c ]---
kobject: 'loop4' (000000006e344ac2): kobject_uevent_env
RIP: 0010:memcmp+0x28/0x160 lib/string.c:856
kobject: 'loop4' (000000006e344ac2): fill_kobj_path: path = '/devices/virtual/block/loop4'
Code: 00 00 48 85 d2 0f 84 0a 01 00 00 48 b8 00 00 00 00 00 fc ff df 55 48 89 f9 48 89 e5 48 c1 e9 03 41 54 53 48 89 fb 48 83 ec 18 <0f> b6 04 01 48 89 f9 83 e1 07 38 c8 7f 08 84 c0 0f 85 98 00 00 00
kobject: 'loop3' (00000000227cbbc8): kobject_uevent_env
RSP: 0018:ffff8801c368ef98 EFLAGS: 00010292
RAX: dffffc0000000000 RBX: 1ffff100386d1e4f RCX: 03fffe20070da3c9
kobject: 'loop3' (00000000227cbbc8): fill_kobj_path: path = '/devices/virtual/block/loop3'
RDX: 0000000000000002 RSI: ffffffff883ba3c0 RDI: 1ffff100386d1e4f
RBP: ffff8801c368efc0 R08: ffff8801c5a284c0 R09: 0000000000000000
R10: ffffed00386d1e5a R11: 0000000000000000 R12: 0000000000000002
R13: ffffffff883ba3c0 R14: 1fff7901fbd6119f R15: dffffc0000000000
FS:  00007f54b7057700(0000) GS:ffff8801dae00000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 000000000072c000 CR3: 00000001ccd07000 CR4: 00000000001406f0