general protection fault in kernfs_name

Title	Repro	Cause bisect	Fix bisect	Count	Last	Reported
general protection fault in del_gendisk (3)	C	done		1	901d	901d

done

901d

Kernel	Title	Repro	Cause bisect	Fix bisect	Count	Last	Reported	Patched	Status
android-5-10	general protection fault in kernfs_name_hash (4)	C	done		2	874d	874d	0/2	closed as dup on 2022/07/11 15:27
android-54	general protection fault in kernfs_name_hash	C			14	640d	852d	0/2	upstream: reported C repro on 2022/07/10 02:13
android-5-10	general protection fault in kernfs_name_hash	C	done		2	935d	935d	0/2	closed as invalid on 2022/05/10 19:54
android-5-10	general protection fault in kernfs_name_hash (2)	C	done		3	897d	897d	0/2	closed as dup on 2022/05/26 23:28
android-5-10	general protection fault in kernfs_name_hash (5)	C	done		3	790d	817d	0/2	closed as dup on 2022/09/14 21:01
android-5-10	general protection fault in kernfs_name_hash (6)	C	error	error	22	598d	764d	0/2	auto-obsoleted due to no activity on 2023/07/19 13:32

RBP: 00007ffc8f2a3470 R08: 0000000000000001 R09: 0000000000000001 R10: 0000000000000002 R11: 0000000000000246 R12: 0000000000000004 R13: 431bde82d7b634db R14: 0000000000000000 R15: 0000000000000000 ---[ end trace 649f6b5d700a90ca ]--- general protection fault, probably for non-canonical address 0xdffffc0000000000: 0000 [#1] PREEMPT SMP KASAN KASAN: null-ptr-deref in range [0x0000000000000000-0x0000000000000007] CPU: 0 PID: 374 Comm: syz-executor206 Tainted: G W 5.10.117-syzkaller-00814-gfdd06dc6b0f8 #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 RIP: 0010:strlen+0x3a/0x80 lib/string.c:568 Code: c0 ff ff ff ff 49 bf 00 00 00 00 00 fc ff df 48 89 fb 66 66 2e 0f 1f 84 00 00 00 00 00 0f 1f 00 49 89 c4 48 89 d8 48 c1 e8 03 <42> 0f b6 04 38 84 c0 75 12 48 ff c3 49 8d 44 24 01 43 80 7c 26 01 RSP: 0018:ffffc9000096fb68 EFLAGS: 00010246 RAX: 0000000000000000 RBX: 0000000000000000 RCX: ffff8881065da780 RDX: 0000000000000000 RSI: 0000000000000000 RDI: 0000000000000000 RBP: ffffc9000096fb88 R08: ffffffff81d1390c R09: fffff5200012df75 R10: fffff5200012df75 R11: 1ffff9200012df74 R12: ffffffffffffffff R13: 0000000000000000 R14: 0000000000000000 R15: dffffc0000000000 FS: 000055555698b300(0000) GS:ffff8881f7000000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 00007f1d6fced35c CR3: 0000000104daf000 CR4: 00000000003506b0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 Call Trace: kernfs_name_hash+0x21/0x240 fs/kernfs/dir.c:302 kernfs_find_ns+0x72/0x280 fs/kernfs/dir.c:841 kernfs_remove_by_name_ns+0x36/0x90 fs/kernfs/dir.c:1514 kernfs_remove_by_name include/linux/kernfs.h:608 [inline] sysfs_remove_link+0x50/0x60 fs/sysfs/symlink.c:152 del_gendisk+0xbe0/0xe20 block/genhd.c:951 loop_remove+0x46/0xb0 drivers/block/loop.c:2185 loop_control_ioctl+0x67f/0x740 drivers/block/loop.c:2284 vfs_ioctl fs/ioctl.c:48 [inline] __do_sys_ioctl fs/ioctl.c:753 [inline] __se_sys_ioctl+0x115/0x190 fs/ioctl.c:739 __x64_sys_ioctl+0x7b/0x90 fs/ioctl.c:739 do_syscall_64+0x34/0x70 arch/x86/entry/common.c:46 entry_SYSCALL_64_after_hwframe+0x44/0xa9 RIP: 0033:0x7f1d6fca9069 Code: 28 00 00 00 75 05 48 83 c4 28 c3 e8 b1 14 00 00 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 73 01 c3 48 c7 c1 c0 ff ff ff f7 d8 64 89 01 48 RSP: 002b:00007ffc8f2a3458 EFLAGS: 00000246 ORIG_RAX: 0000000000000010 RAX: ffffffffffffffda RBX: 0000000000000002 RCX: 00007f1d6fca9069 RDX: 0000000000000000 RSI: 0000000000004c81 RDI: 0000000000000003 RBP: 00007ffc8f2a3470 R08: 0000000000000001 R09: 0000000000000001 R10: 0000000000000002 R11: 0000000000000246 R12: 0000000000000004 R13: 431bde82d7b634db R14: 0000000000000000 R15: 0000000000000000 Modules linked in: ---[ end trace 649f6b5d700a90cb ]--- RIP: 0010:strlen+0x3a/0x80 lib/string.c:568 Code: c0 ff ff ff ff 49 bf 00 00 00 00 00 fc ff df 48 89 fb 66 66 2e 0f 1f 84 00 00 00 00 00 0f 1f 00 49 89 c4 48 89 d8 48 c1 e8 03 <42> 0f b6 04 38 84 c0 75 12 48 ff c3 49 8d 44 24 01 43 80 7c 26 01 RSP: 0018:ffffc9000096fb68 EFLAGS: 00010246 RAX: 0000000000000000 RBX: 0000000000000000 RCX: ffff8881065da780 RDX: 0000000000000000 RSI: 0000000000000000 RDI: 0000000000000000 RBP: ffffc9000096fb88 R08: ffffffff81d1390c R09: fffff5200012df75 R10: fffff5200012df75 R11: 1ffff9200012df74 R12: ffffffffffffffff R13: 0000000000000000 R14: 0000000000000000 R15: dffffc0000000000 FS: 000055555698b300(0000) GS:ffff8881f7100000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 00007ffcf3711d70 CR3: 0000000104daf000 CR4: 00000000003506a0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 ---------------- Code disassembly (best guess), 5 bytes skipped: 0: 49 bf 00 00 00 00 00 movabs $0xdffffc0000000000,%r15 7: fc ff df a: 48 89 fb mov %rdi,%rbx d: 66 66 2e 0f 1f 84 00 data16 nopw %cs:0x0(%rax,%rax,1) 14: 00 00 00 00 18: 0f 1f 00 nopl (%rax) 1b: 49 89 c4 mov %rax,%r12 1e: 48 89 d8 mov %rbx,%rax 21: 48 c1 e8 03 shr $0x3,%rax * 25: 42 0f b6 04 38 movzbl (%rax,%r15,1),%eax <-- trapping instruction 2a: 84 c0 test %al,%al 2c: 75 12 jne 0x40 2e: 48 ff c3 inc %rbx 31: 49 8d 44 24 01 lea 0x1(%r12),%rax 36: 43 rex.XB 37: 80 .byte 0x80 38: 7c 26 jl 0x60 3a: 01 .byte 0x1

Crashes (3):
Time	Kernel	Commit	Syzkaller	Config	Log	Report	Syz repro	C repro	VM info	Manager	Title
2022/06/14 08:26	android12-5.10-lts	fdd06dc6b0f8	0f087040	.config	strace log	report	syz	C		ci2-android-5-10	general protection fault in kernfs_name_hash
2022/06/14 08:10	android12-5.10-lts	fdd06dc6b0f8	0f087040	.config	console log	report			info	ci2-android-5-10	general protection fault in kernfs_name_hash
2022/06/06 10:27	android12-5.10-lts	fdd06dc6b0f8	c8857892	.config	console log	report			info	ci2-android-5-10	general protection fault in kernfs_name_hash

Crashes (3):

Assets (help?)