handle drivers/base/devtmpfs.c:382 [inline]
devtmpfs_work_loop drivers/base/devtmpfs.c:395 [inline]
devtmpfsd+0x1b9/0x2a3 drivers/base/devtmpfs.c:437
kthread+0x3e5/0x4d0 kernel/kthread.c:319
ret_from_fork+0x1f/0x30 arch/x86/entry/entry_64.S:295
==================================================================
Kernel panic - not syncing: panic_on_warn set ...
CPU: 0 PID: 22 Comm: kdevtmpfs Not tainted 5.14.0-syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
Call Trace:
__dump_stack lib/dump_stack.c:88 [inline]
dump_stack_lvl+0xcd/0x134 lib/dump_stack.c:105
panic+0x306/0x73d kernel/panic.c:232
kfence_report_error.cold+0x304/0xa56 mm/kfence/report.c:264
kfence_handle_page_fault+0x203/0x630 mm/kfence/core.c:880
page_fault_oops+0x1c5/0x6b0 arch/x86/mm/fault.c:686
kernelmode_fixup_or_oops+0x219/0x280 arch/x86/mm/fault.c:755
__bad_area_nosemaphore+0x36d/0x400 arch/x86/mm/fault.c:801
do_kern_addr_fault+0x5b/0x70 arch/x86/mm/fault.c:1200
handle_page_fault arch/x86/mm/fault.c:1473 [inline]
exc_page_fault+0x155/0x180 arch/x86/mm/fault.c:1531
asm_exc_page_fault+0x1e/0x30 arch/x86/include/asm/idtentry.h:568
RIP: 0010:kvm_fastop_exception+0xf6d/0x105b
Code: d3 ed e9 b4 e9 6d f8 49 8d 0e 48 83 e1 f8 4c 8b 21 41 8d 0e 83 e1 07 c1 e1 03 49 d3 ec e9 0a f7 6d f8 49 8d 4d 00 48 83 e1 f8 <4c> 8b 21 41 8d 4d 00 83 e1 07 c1 e1 03 49 d3 ec e9 fa 00 6e f8 bd
RSP: 0018:ffffc90000dcfae8 EFLAGS: 00010282
RAX: 0000000036736376 RBX: ffff888035e10c00 RCX: ffff88823bd78020
RDX: ffffed1006bc2187 RSI: 0000000000000004 RDI: 0000000000000007
RBP: 0000000000000004 R08: 0000000000000000 R09: ffff888035e10c30
R10: ffffed1006bc2186 R11: 0000000000000000 R12: ffff88823bd78020
R13: ffff88823bd78020 R14: ffff888035e10c30 R15: dffffc0000000000
d_lookup+0xd8/0x170 fs/dcache.c:2370
lookup_dcache+0x1e/0x130 fs/namei.c:1520
__lookup_hash+0x29/0x180 fs/namei.c:1543
kern_path_locked+0x17e/0x320 fs/namei.c:2567
handle_remove+0xa2/0x5fe drivers/base/devtmpfs.c:312
handle drivers/base/devtmpfs.c:382 [inline]
devtmpfs_work_loop drivers/base/devtmpfs.c:395 [inline]
devtmpfsd+0x1b9/0x2a3 drivers/base/devtmpfs.c:437
kthread+0x3e5/0x4d0 kernel/kthread.c:319
ret_from_fork+0x1f/0x30 arch/x86/entry/entry_64.S:295
Kernel Offset: disabled
----------------
Code disassembly (best guess):
0: d3 ed shr %cl,%ebp
2: e9 b4 e9 6d f8 jmpq 0xf86de9bb
7: 49 8d 0e lea (%r14),%rcx
a: 48 83 e1 f8 and $0xfffffffffffffff8,%rcx
e: 4c 8b 21 mov (%rcx),%r12
11: 41 8d 0e lea (%r14),%ecx
14: 83 e1 07 and $0x7,%ecx
17: c1 e1 03 shl $0x3,%ecx
1a: 49 d3 ec shr %cl,%r12
1d: e9 0a f7 6d f8 jmpq 0xf86df72c
22: 49 8d 4d 00 lea 0x0(%r13),%rcx
26: 48 83 e1 f8 and $0xfffffffffffffff8,%rcx
* 2a: 4c 8b 21 mov (%rcx),%r12 <-- trapping instruction
2d: 41 8d 4d 00 lea 0x0(%r13),%ecx
31: 83 e1 07 and $0x7,%ecx
34: c1 e1 03 shl $0x3,%ecx
37: 49 d3 ec shr %cl,%r12
3a: e9 fa 00 6e f8 jmpq 0xf86e0139
3f: bd .byte 0xbd