general protection fault: 0000 [#1] PREEMPT SMP KASAN kobject: 'kvm' (000000007fdd46e9): kobject_uevent_env CPU: 1 PID: 8886 Comm: syz-executor4 Not tainted 4.19.0-rc8+ #189 kobject: 'loop5' (000000004e89098e): kobject_uevent_env 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:ffff8801bfabef48 EFLAGS: 00010296 kobject: 'loop5' (000000004e89098e): fill_kobj_path: path = '/devices/virtual/block/loop5' RAX: dffffc0000000000 RBX: 1ffff10037f57e40 RCX: 03fffe2006feafc8 RDX: 0000000000000002 RSI: ffffffff883ba280 RDI: 1ffff10037f57e40 RBP: ffff8801bfabef70 R08: ffff8801beb800c0 R09: ffffed003b5e4732 R10: ffffed003b5e4732 R11: ffff8801daf23993 R12: 0000000000000002 R13: ffffffff883ba280 R14: 1fff7901f7a17140 R15: dffffc0000000000 FS: 0000000000000000(0000) GS:ffff8801daf00000(0063) knlGS:00000000f5ff3b40 kobject: 'kvm' (000000007fdd46e9): fill_kobj_path: path = '/devices/virtual/misc/kvm' CS: 0010 DS: 002b ES: 002b CR0: 0000000080050033 CR2: 0000000008148000 CR3: 000000018b259000 CR4: 00000000001426e0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 x86/PAT: syz-executor5:8900 map pfn RAM range req write-combining for [mem 0x188510000-0x188513fff], got write-back DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 Call Trace: strnstr+0x4b/0x70 lib/string.c:934 x86/PAT: syz-executor5:8902 map pfn RAM range req write-combining for [mem 0x188510000-0x188513fff], got write-back __aa_lookupn_ns+0xc1/0x570 security/apparmor/policy_ns.c:209 kobject: 'loop5' (000000004e89098e): kobject_uevent_env kobject: 'loop5' (000000004e89098e): fill_kobj_path: path = '/devices/virtual/block/loop5' 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] __ia32_sys_write+0x71/0xb0 fs/read_write.c:607 do_syscall_32_irqs_on arch/x86/entry/common.c:326 [inline] do_fast_syscall_32+0x34d/0xfb2 arch/x86/entry/common.c:397 entry_SYSENTER_compat+0x70/0x7f arch/x86/entry/entry_64_compat.S:139 RIP: 0023:0xf7ff7ca9 Code: 85 d2 74 02 89 0a 5b 5d c3 8b 04 24 c3 8b 0c 24 c3 8b 1c 24 c3 90 90 90 90 90 90 90 90 90 90 90 90 51 52 55 89 e5 0f 34 cd 80 <5d> 5a 59 c3 90 90 90 90 eb 0d 90 90 90 90 90 90 90 90 90 90 90 90 RSP: 002b:00000000f5ff30cc EFLAGS: 00000296 ORIG_RAX: 0000000000000004 RAX: ffffffffffffffda RBX: 0000000000000003 RCX: 0000000020000280 RDX: 0000000000000009 RSI: 0000000000000000 RDI: 0000000000000000 RBP: 0000000000000000 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000000 R12: 0000000000000000 R13: 0000000000000000 R14: 0000000000000000 R15: 0000000000000000 Modules linked in: ---[ end trace 903798e702396e09 ]--- kobject: 'loop0' (0000000027bf4c34): 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 kobject: 'loop0' (0000000027bf4c34): fill_kobj_path: path = '/devices/virtual/block/loop0' RSP: 0018:ffff8801bfabef48 EFLAGS: 00010296 x86/PAT: syz-executor5:8911 map pfn RAM range req write-combining for [mem 0x18b3b0000-0x18b3b3fff], got write-back kobject: 'loop1' (000000008eef88b6): kobject_uevent_env RAX: dffffc0000000000 RBX: 1ffff10037f57e40 RCX: 03fffe2006feafc8 kobject: 'loop1' (000000008eef88b6): fill_kobj_path: path = '/devices/virtual/block/loop1' RDX: 0000000000000002 RSI: ffffffff883ba280 RDI: 1ffff10037f57e40 kobject: 'loop0' (0000000027bf4c34): kobject_uevent_env RBP: ffff8801bfabef70 R08: ffff8801beb800c0 R09: ffffed003b5e4732 kobject: 'loop0' (0000000027bf4c34): fill_kobj_path: path = '/devices/virtual/block/loop0' kobject: 'loop2' (0000000071713a96): kobject_uevent_env kobject: 'loop2' (0000000071713a96): fill_kobj_path: path = '/devices/virtual/block/loop2' R10: ffffed003b5e4732 R11: ffff8801daf23993 R12: 0000000000000002 kobject: 'loop5' (000000004e89098e): kobject_uevent_env kobject: 'loop5' (000000004e89098e): fill_kobj_path: path = '/devices/virtual/block/loop5' R13: ffffffff883ba280 R14: 1fff7901f7a17140 R15: dffffc0000000000 FS: 0000000000000000(0000) GS:ffff8801daf00000(0063) knlGS:00000000f5ff3b40 CS: 0010 DS: 002b ES: 002b CR0: 0000000080050033 CR2: 0000000021000000 CR3: 000000018b259000 CR4: 00000000001426e0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400