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: 1 PID: 24454 Comm: syz-executor1 Not tainted 4.19.0-rc8+ #286 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 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:ffff880182136f98 EFLAGS: 00010292 RAX: dffffc0000000000 RBX: 34650d3f62e95c00 RCX: 068ca1a7ec5d2b80 RDX: 0000000000000002 RSI: ffffffff883ba280 RDI: 34650d3f62e95c00 RBP: ffff880182136fc0 R08: ffff8801d8b60700 R09: ffffed003b5e4732 R10: ffffed003b5e4732 R11: ffff8801daf23993 R12: 0000000000000002 R13: ffffffff883ba280 R14: 34649540e4fccf50 R15: dffffc0000000000 FS: 00007fecd39e3700(0000) GS:ffff8801daf00000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 000000000072c000 CR3: 00000001bc72c000 CR4: 00000000001426e0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 Call Trace: strnstr+0x4b/0x70 lib/string.c:934 __aa_lookupn_ns+0xc1/0x570 security/apparmor/policy_ns.c:209 aa_lookupn_ns+0x88/0x1e0 security/apparmor/policy_ns.c:240 aa_fqlookupn_profile+0x1b9/0x1010 security/apparmor/policy.c:468 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 apparmor_setprocattr+0xaa4/0x1150 security/apparmor/lsm.c:658 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 __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 entry_SYSCALL_64_after_hwframe+0x49/0xbe RIP: 0033:0x457569 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:00007fecd39e2c78 EFLAGS: 00000246 ORIG_RAX: 0000000000000001 RAX: ffffffffffffffda RBX: 0000000000000003 RCX: 0000000000457569 RDX: 0000000000000009 RSI: 0000000020000280 RDI: 0000000000000003 RBP: 000000000072bf00 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 00007fecd39e36d4 R13: 00000000004c54ee R14: 00000000004d8e08 R15: 00000000ffffffff Modules linked in: kobject: 'loop4' (00000000660cd426): kobject_uevent_env ---[ end trace b44ef08bf88e20bb ]--- kobject: 'loop4' (00000000660cd426): fill_kobj_path: path = '/devices/virtual/block/loop4' 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:ffff880182136f98 EFLAGS: 00010292 RAX: dffffc0000000000 RBX: 34650d3f62e95c00 RCX: 068ca1a7ec5d2b80 kobject: 'loop5' (000000001983a6ba): kobject_uevent_env RDX: 0000000000000002 RSI: ffffffff883ba280 RDI: 34650d3f62e95c00 RBP: ffff880182136fc0 R08: ffff8801d8b60700 R09: ffffed003b5e4732 R10: ffffed003b5e4732 R11: ffff8801daf23993 R12: 0000000000000002 R13: ffffffff883ba280 R14: 34649540e4fccf50 R15: dffffc0000000000 kobject: 'loop5' (000000001983a6ba): fill_kobj_path: path = '/devices/virtual/block/loop5' FS: 00007fecd39e3700(0000) GS:ffff8801daf00000(0000) knlGS:0000000000000000 kobject: 'loop2' (00000000d744f463): kobject_uevent_env CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 kobject: 'loop2' (00000000d744f463): fill_kobj_path: path = '/devices/virtual/block/loop2' CR2: 00007f89ba576db8 CR3: 00000001bc72c000 CR4: 00000000001426e0 kobject: 'loop4' (00000000660cd426): kobject_uevent_env DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 kobject: 'loop4' (00000000660cd426): fill_kobj_path: path = '/devices/virtual/block/loop4' DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 kobject: 'loop5' (000000001983a6ba): kobject_uevent_env