Starting Load/Save RF Kill Switch Status... [ 63.692499][ T22] ================================================================== [ 63.692511][ T22] BUG: KFENCE: use-after-free read in kvm_fastop_exception+0xf6a/0x1058 [ 63.692511][ T22] [ 63.692558][ T22] Use-after-free read at 0xffff88823bcfe020 (in kfence-#126): [ 63.692573][ T22] kvm_fastop_exception+0xf6a/0x1058 [ 63.692593][ T22] d_lookup+0xd8/0x170 [ 63.692614][ T22] lookup_dcache+0x1e/0x130 [ 63.692636][ T22] __lookup_hash+0x29/0x180 [ 63.692658][ T22] kern_path_locked+0x17e/0x320 [ 63.692683][ T22] handle_remove+0xa2/0x5fe [ 63.692708][ T22] devtmpfsd+0x1b9/0x2a3 [ 63.692730][ T22] kthread+0x3e5/0x4d0 [ 63.692752][ T22] ret_from_fork+0x1f/0x30 [ 63.692775][ T22] [ 63.692779][ T22] kfence-#126 [0xffff88823bcfe000-0xffff88823bcfefff, size=4096, cache=names_cache] allocated by task 22: [ 63.692819][ T22] getname_kernel+0x4e/0x370 [ 63.692843][ T22] kern_path_locked+0x71/0x320 [ 63.692867][ T22] handle_remove+0xa2/0x5fe [ 63.692890][ T22] devtmpfsd+0x1b9/0x2a3 [ 63.692910][ T22] kthread+0x3e5/0x4d0 [ 63.692930][ T22] ret_from_fork+0x1f/0x30 [ 63.692951][ T22] [ 63.692951][ T22] freed by task 22: [ 63.692978][ T22] putname.part.0+0xe1/0x120 [ 63.692999][ T22] kern_path_locked+0xc2/0x320 [ 63.693022][ T22] handle_remove+0xa2/0x5fe [ 63.693051][ T22] devtmpfsd+0x1b9/0x2a3 [ 63.693071][ T22] kthread+0x3e5/0x4d0 [ 63.693092][ T22] ret_from_fork+0x1f/0x30 [ 63.693112][ T22] [ 63.693117][ T22] CPU: 1 PID: 22 Comm: kdevtmpfs Not tainted 5.14.0-syzkaller #0 [ 63.693139][ T22] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 63.693152][ T22] RIP: 0010:kvm_fastop_exception+0xf6a/0x1058 [ 63.693176][ T22] Code: d3 ed e9 df d2 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 35 e0 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 25 ea 6e f8 bd [ 63.693197][ T22] RSP: 0018:ffffc90000dcfae8 EFLAGS: 00010282 [ 63.693217][ T22] RAX: 0000003575736376 RBX: ffff88806f254910 RCX: ffff88823bcfe020 [ 63.693232][ T22] RDX: ffffed100de4a929 RSI: 0000000000000005 RDI: 0000000000000007 [ 63.693246][ T22] RBP: 0000000000000005 R08: 0000000000000000 R09: ffff88806f254940 [ 63.693260][ T22] R10: ffffed100de4a928 R11: 0000000000000000 R12: ffff88823bcfe020 [ 63.693275][ T22] R13: ffff88823bcfe020 R14: ffff88806f254940 R15: dffffc0000000000 [ 63.693290][ T22] FS: 0000000000000000(0000) GS:ffff8880b9d00000(0000) knlGS:0000000000000000 [ 63.693312][ T22] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 [ 63.693327][ T22] CR2: ffff88823bcfe020 CR3: 0000000018ea0000 CR4: 00000000001506e0 [ 63.693342][ T22] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 [ 63.693355][ T22] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 [ 63.693369][ T22] Call Trace: [ 63.693381][ T22] d_lookup+0xd8/0x170 [ 63.693406][ T22] lookup_dcache+0x1e/0x130 [ 63.693431][ T22] __lookup_hash+0x29/0x180 [ 63.693457][ T22] kern_path_locked+0x17e/0x320 [ 63.693484][ T22] ? filename_lookup+0x80/0x80 [ 63.693516][ T22] handle_remove+0xa2/0x5fe [ 63.693543][ T22] ? cacheinfo_cpu_online.cold+0x3e/0x3e [ 63.693573][ T22] ? lockdep_hardirqs_on_prepare+0x400/0x400 [ 63.693598][ T22] ? finish_task_switch.isra.0+0x232/0xa50 [ 63.693627][ T22] ? find_held_lock+0x2d/0x110 [ 63.693650][ T22] ? devtmpfsd+0xaa/0x2a3 [ 63.693673][ T22] ? lock_downgrade+0x6e0/0x6e0 [ 63.693695][ T22] ? do_raw_spin_lock+0x120/0x2b0 [ 63.693720][ T22] ? rwlock_bug.part.0+0x90/0x90 [ 63.693748][ T22] devtmpfsd+0x1b9/0x2a3 [ 63.693772][ T22] ? dmar_validate_one_drhd+0x24d/0x24d [ 63.693798][ T22] kthread+0x3e5/0x4d0 [ 63.693822][ T22] ? set_kthread_struct+0x130/0x130 [ 63.693849][ T22] ret_from_fork+0x1f/0x30 [ 63.693880][ T22] ================================================================== [ 63.693888][ T22] Kernel panic - not syncing: panic_on_warn set ... [ 63.694126][ T22] CPU: 1 PID: 22 Comm: kdevtmpfs Not tainted 5.14.0-syzkaller #0 [ 63.694150][ T22] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 63.694163][ T22] Call Trace: [ 63.694172][ T22] dump_stack_lvl+0xcd/0x134 [ 63.694199][ T22] panic+0x2b0/0x6dd [ 63.694222][ T22] ? __warn_printk+0xf3/0xf3 [ 63.694257][ T22] ? kfence_report_error.cold+0x2f3/0xa56 [ 63.694290][ T22] kfence_report_error.cold+0x304/0xa56 [ 63.694317][ T22] ? kvm_fastop_exception+0xf6a/0x1058 [ 63.694347][ T22] ? kfence_print_object+0x350/0x350 [ 63.694377][ T22] ? add_lock_to_list.constprop.0+0x185/0x370 [ 63.694401][ T22] ? kvm_fastop_exception+0xf6a/0x1058 [ 63.694424][ T22] ? d_lookup+0xd8/0x170 [ 63.694449][ T22] ? lookup_dcache+0x1e/0x130 [ 63.694474][ T22] ? __lookup_hash+0x29/0x180 [ 63.694499][ T22] ? kern_path_locked+0x17e/0x320 [ 63.694526][ T22] ? handle_remove+0xa2/0x5fe [ 63.694552][ T22] ? devtmpfsd+0x1b9/0x2a3 [ 63.694576][ T22] ? kthread+0x3e5/0x4d0 [ 63.694601][ T22] ? ret_from_fork+0x1f/0x30 [ 63.694680][ T22] ? mark_lock+0xef/0x17b0 [ 63.694719][ T22] kfence_handle_page_fault+0x203/0x630 [ 63.694755][ T22] page_fault_oops+0x1c5/0x6b0 [ 63.694780][ T22] ? __sanitizer_cov_trace_const_cmp2+0x22/0x80 [ 63.694808][ T22] ? is_prefetch.constprop.0+0xb7/0x530 [ 63.694834][ T22] ? dump_pagetable+0xc0/0xc0 [ 63.694859][ T22] ? pgtable_bad+0x90/0x90 [ 63.694887][ T22] ? search_bpf_extables+0x1d1/0x2f0 [ 63.694912][ T22] ? kvm_fastop_exception+0xf6a/0x1058 [ 63.694944][ T22] kernelmode_fixup_or_oops+0x219/0x280 [ 63.694975][ T22] __bad_area_nosemaphore+0x36d/0x400 [ 63.695001][ T22] ? spurious_kernel_fault+0x38d/0x5b0 [ 63.695037][ T22] do_kern_addr_fault+0x5b/0x70 [ 63.695065][ T22] exc_page_fault+0x155/0x180 [ 63.695092][ T22] asm_exc_page_fault+0x1e/0x30 [ 63.695118][ T22] RIP: 0010:kvm_fastop_exception+0xf6a/0x1058 [ 63.695143][ T22] Code: d3 ed e9 df d2 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 35 e0 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 25 ea 6e f8 bd [ 63.695165][ T22] RSP: 0018:ffffc90000dcfae8 EFLAGS: 00010282 [ 63.695186][ T22] RAX: 0000003575736376 RBX: ffff88806f254910 RCX: ffff88823bcfe020 [ 63.695203][ T22] RDX: ffffed100de4a929 RSI: 0000000000000005 RDI: 0000000000000007 [ 63.695218][ T22] RBP: 0000000000000005 R08: 0000000000000000 R09: ffff88806f254940 [ 63.695234][ T22] R10: ffffed100de4a928 R11: 0000000000000000 R12: ffff88823bcfe020 [ 63.695250][ T22] R13: ffff88823bcfe020 R14: ffff88806f254940 R15: dffffc0000000000 [ 63.695287][ T22] ? __d_lookup+0x372/0x720 [ 63.695327][ T22] d_lookup+0xd8/0x170 [ 63.695357][ T22] lookup_dcache+0x1e/0x130 [ 63.695385][ T22] __lookup_hash+0x29/0x180 [ 63.695416][ T22] kern_path_locked+0x17e/0x320 [ 63.695445][ T22] ? filename_lookup+0x80/0x80 [ 63.695489][ T22] handle_remove+0xa2/0x5fe [ 63.695522][ T22] ? cacheinfo_cpu_online.cold+0x3e/0x3e [ 63.695558][ T22] ? lockdep_hardirqs_on_prepare+0x400/0x400 [ 63.695585][ T22] ? finish_task_switch.isra.0+0x232/0xa50 [ 63.695624][ T22] ? find_held_lock+0x2d/0x110 [ 63.695653][ T22] ? devtmpfsd+0xaa/0x2a3 [ 63.695678][ T22] ? lock_downgrade+0x6e0/0x6e0 [ 63.695704][ T22] ? do_raw_spin_lock+0x120/0x2b0 [ 63.695732][ T22] ? rwlock_bug.part.0+0x90/0x90 [ 63.695770][ T22] devtmpfsd+0x1b9/0x2a3 [ 63.695798][ T22] ? dmar_validate_one_drhd+0x24d/0x24d [ 63.695829][ T22] kthread+0x3e5/0x4d0 [ 63.695854][ T22] ? set_kthread_struct+0x130/0x130 [ 63.695886][ T22] ret_from_fork+0x1f/0x30 [ 63.696292][ T22] Kernel Offset: disabled