kernel panic: panic_on

Kernel	Title	Repro	Cause bisect	Count	Last	Reported	Patched	Status
upstream	kernel panic: panic_on_warn set (4) kernel	syz	error	2	1294d	1294d	0/28	closed as invalid on 2021/09/13 11:45
android-54	kernel panic: panic_on_warn set	C		52	1483d	1581d	0/2	auto-obsoleted due to no activity on 2023/04/24 19:54
upstream	kernel panic: panic_on_warn set (3) kernel	syz	error	1	1296d	1295d	0/28	closed as invalid on 2021/09/10 07:34
upstream	kernel panic: panic_on_warn set (2) io-uring	syz	error	1	1297d	1297d	0/28	closed as invalid on 2021/09/08 09:41

handle drivers/base/devtmpfs.c:382 [inline] devtmpfs_work_loop drivers/base/devtmpfs.c:395 [inline] devtmpfsd+0x1ba/0x2ab 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-rc6-next-20210820-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:106 panic+0x2af/0x6d5 kernel/panic.c:232 kfence_report_error.cold+0x30b/0xa76 mm/kfence/report.c:271 kfence_handle_page_fault+0x205/0x640 mm/kfence/core.c:883 page_fault_oops+0x1c5/0x6b0 arch/x86/mm/fault.c:686 kernelmode_fixup_or_oops+0x221/0x280 arch/x86/mm/fault.c:755 __bad_area_nosemaphore+0x372/0x400 arch/x86/mm/fault.c:801 do_kern_addr_fault+0x5f/0x80 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+0xf68/0x1056 Code: d3 ed e9 e4 91 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 3f 9f 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 39 a9 6d f8 bd RSP: 0018:ffffc90000dcfaa8 EFLAGS: 00010282 RAX: 0000000035736376 RBX: ffff88806df67358 RCX: ffff88823bd14020 RDX: ffffed100dbece72 RSI: 0000000000000004 RDI: 0000000000000007 RBP: 0000000000000004 R08: 0000000000000000 R09: ffff88806df67388 R10: ffffed100dbece71 R11: 0000000000000000 R12: ffff88823bd14020 R13: ffff88823bd14020 R14: ffff88806df67388 R15: dffffc0000000000 d_lookup+0xdd/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+0x1ba/0x2ab 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 e4 91 6d f8 jmpq 0xf86d91eb 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 3f 9f 6d f8 jmpq 0xf86d9f61 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 39 a9 6d f8 jmpq 0xf86da978 3f: bd .byte 0xbd