[ 67.177547][ T22] devtmpfsd+0x1b9/0x2a3 [ 67.177571][ T22] kthread+0x3e5/0x4d0 [ 67.177595][ T22] ret_from_fork+0x1f/0x30 [ 67.177620][ T22] [ 67.177624][ T22] kfence-#138: 0xffff88823bd16000-0xffff88823bd16fff, size=4096, cache=names_cache [ 67.177624][ T22] [ 67.177646][ T22] allocated by task 22 on cpu 1 at 67.177120s: [ 67.177676][ T22] getname_kernel+0x4e/0x370 [ 67.177703][ T22] kern_path_locked+0x71/0x320 [ 67.177730][ T22] handle_remove+0xa2/0x5fe [ 67.177751][ T22] devtmpfsd+0x1b9/0x2a3 [ 67.177774][ T22] kthread+0x3e5/0x4d0 [ 67.177796][ T22] ret_from_fork+0x1f/0x30 [ 67.177819][ T22] [ 67.177822][ T22] freed by task 22 on cpu 1 at 67.177152s: [ 67.177858][ T22] putname.part.0+0xe1/0x120 [ 67.177882][ T22] kern_path_locked+0xc2/0x320 [ 67.177908][ T22] handle_remove+0xa2/0x5fe [ 67.177929][ T22] devtmpfsd+0x1b9/0x2a3 [ 67.177952][ T22] kthread+0x3e5/0x4d0 [ 67.177974][ T22] ret_from_fork+0x1f/0x30 [ 67.177995][ T22] [ 67.178000][ T22] CPU: 1 PID: 22 Comm: kdevtmpfs Not tainted 5.14.0-next-20210907-syzkaller #0 [ 67.178026][ T22] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 67.178039][ T22] RIP: 0010:kvm_fastop_exception+0xf6a/0x1058 [ 67.178067][ T22] Code: d3 ed e9 ff 66 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 55 74 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 45 7e 6d f8 bd [ 67.178090][ T22] RSP: 0018:ffffc90000dcfae8 EFLAGS: 00010282 [ 67.178108][ T22] RAX: 0000000036736376 RBX: ffff88806df6e4a8 RCX: ffff88823bd16020 [ 67.178124][ T22] RDX: ffffed100dbedc9c RSI: 0000000000000004 RDI: 0000000000000007 [ 67.178137][ T22] RBP: 0000000000000004 R08: 0000000000000000 R09: ffff88806df6e4d8 [ 67.178152][ T22] R10: ffffed100dbedc9b R11: 0000000000000000 R12: ffff88823bd16020 [ 67.178167][ T22] R13: ffff88823bd16020 R14: ffff88806df6e4d8 R15: dffffc0000000000 [ 67.178185][ T22] FS: 0000000000000000(0000) GS:ffff8880b9d00000(0000) knlGS:0000000000000000 [ 67.178208][ T22] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 [ 67.178226][ T22] CR2: ffff88823bd16020 CR3: 000000000b68e000 CR4: 00000000001506e0 [ 67.178241][ T22] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 [ 67.178255][ T22] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 [ 67.178269][ T22] Call Trace: [ 67.178282][ T22] d_lookup+0xd8/0x170 [ 67.178311][ T22] lookup_dcache+0x1e/0x130 [ 67.178340][ T22] __lookup_hash+0x29/0x180 [ 67.178369][ T22] kern_path_locked+0x17e/0x320 [ 67.178400][ T22] ? filename_lookup+0x80/0x80 [ 67.178436][ T22] handle_remove+0xa2/0x5fe [ 67.178462][ T22] ? cacheinfo_cpu_online.cold+0x3e/0x3e [ 67.178497][ T22] ? lockdep_hardirqs_on_prepare+0x400/0x400 [ 67.178523][ T22] ? finish_task_switch.isra.0+0x217/0xa20 [ 67.178555][ T22] ? find_held_lock+0x2d/0x110 [ 67.178580][ T22] ? devtmpfsd+0xaa/0x2a3 [ 67.178605][ T22] ? lock_downgrade+0x6e0/0x6e0 [ 67.178629][ T22] ? do_raw_spin_lock+0x120/0x2b0 [ 67.178655][ T22] ? rwlock_bug.part.0+0x90/0x90 [ 67.178685][ T22] devtmpfsd+0x1b9/0x2a3 [ 67.178711][ T22] ? dmar_validate_one_drhd+0x24d/0x24d [ 67.178741][ T22] kthread+0x3e5/0x4d0 [ 67.178766][ T22] ? set_kthread_struct+0x130/0x130 [ 67.178795][ T22] ret_from_fork+0x1f/0x30 [ 67.178827][ T22] ================================================================== [ 67.178837][ T22] Kernel panic - not syncing: panic_on_warn set ... [ 67.179125][ T22] CPU: 1 PID: 22 Comm: kdevtmpfs Not tainted 5.14.0-next-20210907-syzkaller #0 [ 67.179151][ T22] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 67.179164][ T22] Call Trace: [ 67.179171][ T22] dump_stack_lvl+0xcd/0x134 [ 67.179204][ T22] panic+0x2b0/0x6dd [ 67.179257][ T22] ? __warn_printk+0xf3/0xf3 [ 67.179301][ T22] ? kfence_report_error.cold+0x2f3/0xa56 [ 67.179341][ T22] kfence_report_error.cold+0x304/0xa56 [ 67.179376][ T22] ? kvm_fastop_exception+0xf6a/0x1058 [ 67.179410][ T22] ? kfence_print_object+0x2e0/0x2e0 [ 67.179444][ T22] ? add_lock_to_list.constprop.0+0x185/0x370 [ 67.179471][ T22] ? kvm_fastop_exception+0xf6a/0x1058 [ 67.179506][ T22] ? d_lookup+0xd8/0x170 [ 67.179534][ T22] ? lookup_dcache+0x1e/0x130 [ 67.179562][ T22] ? __lookup_hash+0x29/0x180 [ 67.179590][ T22] ? kern_path_locked+0x17e/0x320 [ 67.179620][ T22] ? handle_remove+0xa2/0x5fe [ 67.179646][ T22] ? devtmpfsd+0x1b9/0x2a3 [ 67.179673][ T22] ? kthread+0x3e5/0x4d0 [ 67.179698][ T22] ? ret_from_fork+0x1f/0x30 [ 67.179777][ T22] ? mark_lock+0xef/0x17b0 [ 67.179816][ T22] kfence_handle_page_fault+0x203/0x630 [ 67.179852][ T22] page_fault_oops+0x1c5/0x6b0 [ 67.179879][ T22] ? __sanitizer_cov_trace_const_cmp2+0x22/0x80 [ 67.179908][ T22] ? is_prefetch.constprop.0+0xb7/0x530 [ 67.179933][ T22] ? dump_pagetable+0xc0/0xc0 [ 67.179957][ T22] ? pgtable_bad+0x90/0x90 [ 67.179984][ T22] ? search_bpf_extables+0x1d1/0x2f0 [ 67.180011][ T22] ? kvm_fastop_exception+0xf6a/0x1058 [ 67.180042][ T22] kernelmode_fixup_or_oops+0x219/0x280 [ 67.180071][ T22] __bad_area_nosemaphore+0x36d/0x400 [ 67.180098][ T22] ? spurious_kernel_fault+0x38d/0x5b0 [ 67.180130][ T22] do_kern_addr_fault+0x5b/0x70 [ 67.180160][ T22] exc_page_fault+0x155/0x180 [ 67.180187][ T22] asm_exc_page_fault+0x1e/0x30 [ 67.180213][ T22] RIP: 0010:kvm_fastop_exception+0xf6a/0x1058 [ 67.180242][ T22] Code: d3 ed e9 ff 66 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 55 74 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 45 7e 6d f8 bd [ 67.180266][ T22] RSP: 0018:ffffc90000dcfae8 EFLAGS: 00010282 [ 67.180287][ T22] RAX: 0000000036736376 RBX: ffff88806df6e4a8 RCX: ffff88823bd16020 [ 67.180304][ T22] RDX: ffffed100dbedc9c RSI: 0000000000000004 RDI: 0000000000000007 [ 67.180318][ T22] RBP: 0000000000000004 R08: 0000000000000000 R09: ffff88806df6e4d8 [ 67.180333][ T22] R10: ffffed100dbedc9b R11: 0000000000000000 R12: ffff88823bd16020 [ 67.180349][ T22] R13: ffff88823bd16020 R14: ffff88806df6e4d8 R15: dffffc0000000000 [ 67.180386][ T22] ? __d_lookup+0x372/0x720 [ 67.180430][ T22] d_lookup+0xd8/0x170 [ 67.180463][ T22] lookup_dcache+0x1e/0x130 [ 67.180498][ T22] __lookup_hash+0x29/0x180 [ 67.180532][ T22] kern_path_locked+0x17e/0x320 [ 67.180565][ T22] ? filename_lookup+0x80/0x80 [ 67.180612][ T22] handle_remove+0xa2/0x5fe [ 67.180644][ T22] ? cacheinfo_cpu_online.cold+0x3e/0x3e [ 67.180678][ T22] ? lockdep_hardirqs_on_prepare+0x400/0x400 [ 67.180709][ T22] ? finish_task_switch.isra.0+0x217/0xa20 [ 67.180751][ T22] ? find_held_lock+0x2d/0x110 [ 67.180783][ T22] ? devtmpfsd+0xaa/0x2a3 [ 67.180811][ T22] ? lock_downgrade+0x6e0/0x6e0 [ 67.180838][ T22] ? do_raw_spin_lock+0x120/0x2b0 [ 67.180867][ T22] ? rwlock_bug.part.0+0x90/0x90 [ 67.180908][ T22] devtmpfsd+0x1b9/0x2a3 [ 67.180938][ T22] ? dmar_validate_one_drhd+0x24d/0x24d [ 67.180973][ T22] kthread+0x3e5/0x4d0 [ 67.181000][ T22] ? set_kthread_struct+0x130/0x130 [ 67.181033][ T22] ret_from_fork+0x1f/0x30 [ 67.182788][ T22] Kernel Offset: disabled