[ 64.329618][ T22] kthread+0x3e5/0x4d0 [ 64.329635][ T22] ret_from_fork+0x1f/0x30 [ 64.329652][ T22] [ 64.329656][ T22] CPU: 0 PID: 22 Comm: kdevtmpfs Not tainted 5.14.0-syzkaller #0 [ 64.329675][ T22] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 64.329686][ T22] RIP: 0010:kvm_fastop_exception+0xf6d/0x105b [ 64.329707][ T22] Code: d3 ed e9 f4 e2 6e f8 49 8d 0e 48 83 e1 f8 4c 8b 21 41 8d 0e 83 e1 07 c1 e1 03 49 d3 ec e9 4a f0 6e 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 3a fa 6e f8 bd [ 64.329724][ T22] RSP: 0018:ffffc90000dcfae8 EFLAGS: 00010282 [ 64.329741][ T22] RAX: 0000003561736376 RBX: ffff88806e512ef0 RCX: ffff88823bcfc020 [ 64.329754][ T22] RDX: ffffed100dca25e5 RSI: 0000000000000005 RDI: 0000000000000007 [ 64.329766][ T22] RBP: 0000000000000005 R08: 0000000000000000 R09: ffff88806e512f20 [ 64.329778][ T22] R10: ffffed100dca25e4 R11: 0000000000000000 R12: ffff88823bcfc020 [ 64.329791][ T22] R13: ffff88823bcfc020 R14: ffff88806e512f20 R15: dffffc0000000000 [ 64.329805][ T22] FS: 0000000000000000(0000) GS:ffff8880b9c00000(0000) knlGS:0000000000000000 [ 64.329824][ T22] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 [ 64.329837][ T22] CR2: ffff88823bcfc020 CR3: 0000000016dc1000 CR4: 00000000001506f0 [ 64.329850][ T22] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 [ 64.329861][ T22] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 [ 64.329873][ T22] Call Trace: [ 64.329882][ T22] d_lookup+0xd8/0x170 [ 64.329902][ T22] lookup_dcache+0x1e/0x130 [ 64.329922][ T22] __lookup_hash+0x29/0x180 [ 64.329943][ T22] kern_path_locked+0x17e/0x320 [ 64.329964][ T22] ? filename_lookup+0x80/0x80 [ 64.329989][ T22] handle_remove+0xa2/0x5fe [ 64.330011][ T22] ? cacheinfo_cpu_online.cold+0x3e/0x3e [ 64.330035][ T22] ? lockdep_hardirqs_on_prepare+0x400/0x400 [ 64.330057][ T22] ? finish_task_switch.isra.0+0x232/0xa50 [ 64.330081][ T22] ? find_held_lock+0x2d/0x110 [ 64.330100][ T22] ? devtmpfsd+0xaa/0x2a3 [ 64.330118][ T22] ? lock_downgrade+0x6e0/0x6e0 [ 64.330141][ T22] ? do_raw_spin_lock+0x120/0x2b0 [ 64.330162][ T22] ? rwlock_bug.part.0+0x90/0x90 [ 64.330184][ T22] devtmpfsd+0x1b9/0x2a3 [ 64.330203][ T22] ? dmar_validate_one_drhd+0x24d/0x24d [ 64.330224][ T22] kthread+0x3e5/0x4d0 [ 64.330243][ T22] ? set_kthread_struct+0x130/0x130 [ 64.330265][ T22] ret_from_fork+0x1f/0x30 [ 64.330289][ T22] ================================================================== [ 64.330297][ T22] Kernel panic - not syncing: panic_on_warn set ... [ 64.330520][ T22] CPU: 0 PID: 22 Comm: kdevtmpfs Not tainted 5.14.0-syzkaller #0 [ 64.330540][ T22] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 64.330551][ T22] Call Trace: [ 64.330557][ T22] dump_stack_lvl+0xcd/0x134 [ 64.330579][ T22] panic+0x2b0/0x6dd [ 64.330597][ T22] ? __warn_printk+0xf3/0xf3 [ 64.330625][ T22] ? kfence_report_error.cold+0x2f3/0xa56 [ 64.330658][ T22] kfence_report_error.cold+0x304/0xa56 [ 64.330686][ T22] ? kvm_fastop_exception+0xf6d/0x105b [ 64.330710][ T22] ? kfence_print_object+0x350/0x350 [ 64.330734][ T22] ? add_lock_to_list.constprop.0+0x185/0x370 [ 64.330755][ T22] ? kvm_fastop_exception+0xf6d/0x105b [ 64.330774][ T22] ? d_lookup+0xd8/0x170 [ 64.330793][ T22] ? lookup_dcache+0x1e/0x130 [ 64.330813][ T22] ? __lookup_hash+0x29/0x180 [ 64.330833][ T22] ? kern_path_locked+0x17e/0x320 [ 64.330855][ T22] ? handle_remove+0xa2/0x5fe [ 64.330876][ T22] ? devtmpfsd+0x1b9/0x2a3 [ 64.330895][ T22] ? kthread+0x3e5/0x4d0 [ 64.330915][ T22] ? ret_from_fork+0x1f/0x30 [ 64.330974][ T22] ? mark_lock+0xef/0x17b0 [ 64.331004][ T22] kfence_handle_page_fault+0x203/0x630 [ 64.331033][ T22] page_fault_oops+0x1c5/0x6b0 [ 64.331053][ T22] ? __sanitizer_cov_trace_const_cmp2+0x22/0x80 [ 64.331077][ T22] ? is_prefetch.constprop.0+0xb7/0x530 [ 64.331098][ T22] ? dump_pagetable+0xc0/0xc0 [ 64.331119][ T22] ? pgtable_bad+0x90/0x90 [ 64.331149][ T22] ? search_bpf_extables+0x1d1/0x2f0 [ 64.331169][ T22] ? kvm_fastop_exception+0xf6d/0x105b [ 64.331194][ T22] kernelmode_fixup_or_oops+0x219/0x280 [ 64.331219][ T22] __bad_area_nosemaphore+0x36d/0x400 [ 64.331241][ T22] ? spurious_kernel_fault+0x38d/0x5b0 [ 64.331266][ T22] do_kern_addr_fault+0x5b/0x70 [ 64.331288][ T22] exc_page_fault+0x155/0x180 [ 64.331310][ T22] asm_exc_page_fault+0x1e/0x30 [ 64.331331][ T22] RIP: 0010:kvm_fastop_exception+0xf6d/0x105b [ 64.331352][ T22] Code: d3 ed e9 f4 e2 6e f8 49 8d 0e 48 83 e1 f8 4c 8b 21 41 8d 0e 83 e1 07 c1 e1 03 49 d3 ec e9 4a f0 6e 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 3a fa 6e f8 bd [ 64.331370][ T22] RSP: 0018:ffffc90000dcfae8 EFLAGS: 00010282 [ 64.331388][ T22] RAX: 0000003561736376 RBX: ffff88806e512ef0 RCX: ffff88823bcfc020 [ 64.331402][ T22] RDX: ffffed100dca25e5 RSI: 0000000000000005 RDI: 0000000000000007 [ 64.331415][ T22] RBP: 0000000000000005 R08: 0000000000000000 R09: ffff88806e512f20 [ 64.331428][ T22] R10: ffffed100dca25e4 R11: 0000000000000000 R12: ffff88823bcfc020 [ 64.331441][ T22] R13: ffff88823bcfc020 R14: ffff88806e512f20 R15: dffffc0000000000 [ 64.331470][ T22] ? __d_lookup+0x372/0x720 [ 64.331501][ T22] d_lookup+0xd8/0x170 [ 64.331524][ T22] lookup_dcache+0x1e/0x130 [ 64.331546][ T22] __lookup_hash+0x29/0x180 [ 64.331571][ T22] kern_path_locked+0x17e/0x320 [ 64.331594][ T22] ? filename_lookup+0x80/0x80 [ 64.331629][ T22] handle_remove+0xa2/0x5fe [ 64.331654][ T22] ? cacheinfo_cpu_online.cold+0x3e/0x3e [ 64.331682][ T22] ? lockdep_hardirqs_on_prepare+0x400/0x400 [ 64.331705][ T22] ? finish_task_switch.isra.0+0x232/0xa50 [ 64.331736][ T22] ? find_held_lock+0x2d/0x110 [ 64.331759][ T22] ? devtmpfsd+0xaa/0x2a3 [ 64.331779][ T22] ? lock_downgrade+0x6e0/0x6e0 [ 64.331800][ T22] ? do_raw_spin_lock+0x120/0x2b0 [ 64.331822][ T22] ? rwlock_bug.part.0+0x90/0x90 [ 64.331852][ T22] devtmpfsd+0x1b9/0x2a3 [ 64.331874][ T22] ? dmar_validate_one_drhd+0x24d/0x24d [ 64.331899][ T22] kthread+0x3e5/0x4d0 [ 64.331920][ T22] ? set_kthread_struct+0x130/0x130 [ 64.331945][ T22] ret_from_fork+0x1f/0x30 [ 64.332335][ T22] Kernel Offset: disabled