[ 63.952307][ T22] handle_remove+0xa2/0x5fe [ 63.952332][ T22] devtmpfsd+0x1ba/0x2ab [ 63.952352][ T22] kthread+0x3e5/0x4d0 [ 63.952374][ T22] ret_from_fork+0x1f/0x30 [ 63.952395][ T22] [ 63.952399][ T22] kfence-#137: 0xffff88823bd14000-0xffff88823bd14fff, size=4096, cache=names_cache [ 63.952399][ T22] [ 63.952419][ T22] allocated by task 22 on cpu 0 at 63.952105s: [ 63.952449][ T22] getname_kernel+0x4e/0x370 [ 63.952472][ T22] kern_path_locked+0x71/0x320 [ 63.952494][ T22] handle_remove+0xa2/0x5fe [ 63.952513][ T22] devtmpfsd+0x1ba/0x2ab [ 63.952537][ T22] kthread+0x3e5/0x4d0 [ 63.952555][ T22] ret_from_fork+0x1f/0x30 [ 63.952572][ T22] [ 63.952574][ T22] freed by task 22 on cpu 0 at 63.952125s: [ 63.952604][ T22] putname.part.0+0xe9/0x130 [ 63.952621][ T22] kern_path_locked+0xc2/0x320 [ 63.952640][ T22] handle_remove+0xa2/0x5fe [ 63.952658][ T22] devtmpfsd+0x1ba/0x2ab [ 63.952675][ T22] kthread+0x3e5/0x4d0 [ 63.952691][ T22] ret_from_fork+0x1f/0x30 [ 63.952708][ T22] [ 63.952712][ T22] CPU: 0 PID: 22 Comm: kdevtmpfs Not tainted 5.14.0-rc6-next-20210820-syzkaller #0 [ 63.952731][ T22] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 63.952742][ T22] RIP: 0010:kvm_fastop_exception+0xf68/0x1056 [ 63.952763][ T22] 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 [ 63.952780][ T22] RSP: 0018:ffffc90000dcfaa8 EFLAGS: 00010282 [ 63.952796][ T22] RAX: 0000000035736376 RBX: ffff88806df67358 RCX: ffff88823bd14020 [ 63.952809][ T22] RDX: ffffed100dbece72 RSI: 0000000000000004 RDI: 0000000000000007 [ 63.952820][ T22] RBP: 0000000000000004 R08: 0000000000000000 R09: ffff88806df67388 [ 63.952831][ T22] R10: ffffed100dbece71 R11: 0000000000000000 R12: ffff88823bd14020 [ 63.952843][ T22] R13: ffff88823bd14020 R14: ffff88806df67388 R15: dffffc0000000000 [ 63.952856][ T22] FS: 0000000000000000(0000) GS:ffff8880b9c00000(0000) knlGS:0000000000000000 [ 63.952875][ T22] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 [ 63.952888][ T22] CR2: ffff88823bd14020 CR3: 000000001a98f000 CR4: 00000000001506f0 [ 63.952900][ T22] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 [ 63.952911][ T22] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 [ 63.952922][ T22] Call Trace: [ 63.952930][ T22] ? d_lookup+0x158/0x170 [ 63.952951][ T22] d_lookup+0xdd/0x170 [ 63.952971][ T22] lookup_dcache+0x1e/0x130 [ 63.952990][ T22] __lookup_hash+0x29/0x180 [ 63.953011][ T22] kern_path_locked+0x17e/0x320 [ 63.953032][ T22] ? filename_lookup+0x80/0x80 [ 63.953053][ T22] ? rcu_read_lock_sched_held+0xd/0x70 [ 63.953071][ T22] ? lock_release+0x522/0x720 [ 63.953090][ T22] ? lock_acquire+0x442/0x510 [ 63.953107][ T22] ? rcu_read_lock_sched_held+0xd/0x70 [ 63.953126][ T22] handle_remove+0xa2/0x5fe [ 63.953148][ T22] ? cacheinfo_cpu_online.cold+0x3e/0x3e [ 63.953173][ T22] ? finish_task_switch.isra.0+0x21c/0xa20 [ 63.953193][ T22] ? trace_hardirqs_on+0x5b/0x1c0 [ 63.953215][ T22] ? finish_task_switch.isra.0+0x21c/0xa20 [ 63.953234][ T22] ? __switch_to+0x5cc/0x1060 [ 63.953255][ T22] ? rcu_read_lock_sched_held+0xd/0x70 [ 63.953272][ T22] ? lock_acquire+0x442/0x510 [ 63.953290][ T22] ? rcu_read_lock_sched_held+0xd/0x70 [ 63.953308][ T22] ? lock_release+0x522/0x720 [ 63.953325][ T22] ? devtmpfsd+0xaa/0x2ab [ 63.953344][ T22] ? lock_downgrade+0x6e0/0x6e0 [ 63.953362][ T22] ? do_raw_spin_lock+0x120/0x2b0 [ 63.953382][ T22] ? rwlock_bug.part.0+0x90/0x90 [ 63.953403][ T22] devtmpfsd+0x1ba/0x2ab [ 63.953423][ T22] ? dmar_validate_one_drhd+0x255/0x255 [ 63.953445][ T22] kthread+0x3e5/0x4d0 [ 63.953464][ T22] ? set_kthread_struct+0x130/0x130 [ 63.953486][ T22] ret_from_fork+0x1f/0x30 [ 63.953510][ T22] ================================================================== [ 63.953517][ T22] Kernel panic - not syncing: panic_on_warn set ... [ 63.953524][ T22] CPU: 0 PID: 22 Comm: kdevtmpfs Not tainted 5.14.0-rc6-next-20210820-syzkaller #0 [ 63.953550][ T22] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 63.953559][ T22] Call Trace: [ 63.953565][ T22] dump_stack_lvl+0xcd/0x134 [ 63.953584][ T22] panic+0x2af/0x6d5 [ 63.953602][ T22] ? __warn_printk+0xf0/0xf0 [ 63.953622][ T22] ? ret_from_fork+0x1f/0x30 [ 63.953640][ T22] ? kfence_report_error.cold+0x2fa/0xa76 [ 63.953662][ T22] kfence_report_error.cold+0x30b/0xa76 [ 63.953682][ T22] ? kvm_fastop_exception+0xf68/0x1056 [ 63.953700][ T22] ? unwind_next_frame+0x3da/0x1ce0 [ 63.953718][ T22] ? kfence_print_object+0x2e0/0x2e0 [ 63.953739][ T22] ? kvm_fastop_exception+0xf68/0x1056 [ 63.953756][ T22] ? d_lookup+0xdd/0x170 [ 63.953775][ T22] ? lookup_dcache+0x1e/0x130 [ 63.953793][ T22] ? __lookup_hash+0x29/0x180 [ 63.953812][ T22] ? kern_path_locked+0x17e/0x320 [ 63.953833][ T22] ? handle_remove+0xa2/0x5fe [ 63.953853][ T22] ? devtmpfsd+0x1ba/0x2ab [ 63.953871][ T22] ? kthread+0x3e5/0x4d0 [ 63.953889][ T22] ? ret_from_fork+0x1f/0x30 [ 63.953926][ T22] kfence_handle_page_fault+0x205/0x640 [ 63.953948][ T22] ? rcu_read_lock_sched_held+0xd/0x70 [ 63.953967][ T22] page_fault_oops+0x1c5/0x6b0 [ 63.953989][ T22] ? arch_stack_walk+0x5c/0xe0 [ 63.954007][ T22] ? __sanitizer_cov_trace_const_cmp2+0x22/0x80 [ 63.954029][ T22] ? is_prefetch.constprop.0+0xb7/0x530 [ 63.954048][ T22] ? dump_pagetable+0xc0/0xc0 [ 63.954065][ T22] ? bpf_ksym_find+0x171/0x1c0 [ 63.954087][ T22] ? pgtable_bad+0x90/0x90 [ 63.954105][ T22] ? search_bpf_extables+0x1d6/0x2f0 [ 63.954122][ T22] ? kvm_fastop_exception+0xf68/0x1056 [ 63.954143][ T22] kernelmode_fixup_or_oops+0x221/0x280 [ 63.954164][ T22] __bad_area_nosemaphore+0x372/0x400 [ 63.954184][ T22] ? lock_acquire+0x442/0x510 [ 63.954203][ T22] do_kern_addr_fault+0x5f/0x80 [ 63.954221][ T22] ? __sanitizer_cov_trace_const_cmp8+0x1d/0x70 [ 63.954263][ T22] exc_page_fault+0x155/0x180 [ 63.954283][ T22] asm_exc_page_fault+0x1e/0x30 [ 63.954303][ T22] RIP: 0010:kvm_fastop_exception+0xf68/0x1056 [ 63.954323][ T22] 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 [ 63.954339][ T22] RSP: 0018:ffffc90000dcfaa8 EFLAGS: 00010282 [ 63.954353][ T22] RAX: 0000000035736376 RBX: ffff88806df67358 RCX: ffff88823bd14020 [ 63.954366][ T22] RDX: ffffed100dbece72 RSI: 0000000000000004 RDI: 0000000000000007 [ 63.954377][ T22] RBP: 0000000000000004 R08: 0000000000000000 R09: ffff88806df67388 [ 63.954388][ T22] R10: ffffed100dbece71 R11: 0000000000000000 R12: ffff88823bd14020 [ 63.954400][ T22] R13: ffff88823bd14020 R14: ffff88806df67388 R15: dffffc0000000000 [ 63.954418][ T22] ? __d_lookup+0x37c/0x730 [ 63.954439][ T22] ? d_lookup+0x158/0x170 [ 63.954459][ T22] d_lookup+0xdd/0x170 [ 63.954478][ T22] lookup_dcache+0x1e/0x130 [ 63.954498][ T22] __lookup_hash+0x29/0x180 [ 63.954518][ T22] kern_path_locked+0x17e/0x320 [ 63.954543][ T22] ? filename_lookup+0x80/0x80 [ 63.954564][ T22] ? rcu_read_lock_sched_held+0xd/0x70 [ 63.954581][ T22] ? lock_release+0x522/0x720 [ 63.954599][ T22] ? lock_acquire+0x442/0x510 [ 63.954616][ T22] ? rcu_read_lock_sched_held+0xd/0x70 [ 63.954635][ T22] handle_remove+0xa2/0x5fe [ 63.954657][ T22] ? cacheinfo_cpu_online.cold+0x3e/0x3e [ 63.954682][ T22] ? finish_task_switch.isra.0+0x21c/0xa20 [ 63.954701][ T22] ? trace_hardirqs_on+0x5b/0x1c0 [ 63.954721][ T22] ? finish_task_switch.isra.0+0x21c/0xa20 [ 63.954740][ T22] ? __switch_to+0x5cc/0x1060 [ 63.954760][ T22] ? rcu_read_lock_sched_held+0xd/0x70 [ 63.954777][ T22] ? lock_acquire+0x442/0x510 [ 63.954795][ T22] ? rcu_read_lock_sched_held+0xd/0x70 [ 63.954813][ T22] ? lock_release+0x522/0x720 [ 63.954830][ T22] ? devtmpfsd+0xaa/0x2ab [ 63.954848][ T22] ? lock_downgrade+0x6e0/0x6e0 [ 63.954866][ T22] ? do_raw_spin_lock+0x120/0x2b0 [ 63.954886][ T22] ? rwlock_bug.part.0+0x90/0x90 [ 63.954907][ T22] devtmpfsd+0x1ba/0x2ab [ 63.954927][ T22] ? dmar_validate_one_drhd+0x255/0x255 [ 63.954948][ T22] kthread+0x3e5/0x4d0 [ 63.954967][ T22] ? set_kthread_struct+0x130/0x130 [ 63.954989][ T22] ret_from_fork+0x1f/0x30 [ 63.956646][ T22] Kernel Offset: disabled