[ OK ] Started Getty on tty4. [ OK ] Started Getty on tty3. [ OK ] Started Getty on tty2. [ OK ] Started Serial Getty on ttyS0. [ OK ] Started Getty on tty1. [ OK ] Reached target Login Prompts. [ OK ] Reached target Multi-User System. [ OK ] Reached target Graphical Interface. Starting Update UTMP about System Runlevel Changes... [ OK ] Started Update UTMP about System Runlevel Changes. Starting Load/Save RF Kill Switch Status... [ OK ] Started Load/Save RF Kill Switch Status. [ 69.026042][ T22] ================================================================== [ 69.026056][ T22] BUG: KFENCE: use-after-free read in kvm_fastop_exception+0xf6d/0x105b [ 69.026056][ T22] [ 69.026104][ T22] Use-after-free read at 0xffff88823bd7c020 (in kfence-#189): [ 69.026120][ T22] kvm_fastop_exception+0xf6d/0x105b [ 69.026143][ T22] d_lookup+0xd8/0x170 [ 69.026165][ T22] lookup_dcache+0x1e/0x130 [ 69.026189][ T22] __lookup_hash+0x29/0x180 [ 69.026211][ T22] kern_path_locked+0x17e/0x320 [ 69.026236][ T22] handle_remove+0xa2/0x5fe [ 69.026262][ T22] devtmpfsd+0x1b9/0x2a3 [ 69.026292][ T22] kthread+0x3e5/0x4d0 [ 69.026317][ T22] ret_from_fork+0x1f/0x30 [ 69.026341][ T22] [ 69.026346][ T22] kfence-#189 [0xffff88823bd7c000-0xffff88823bd7cfff, size=4096, cache=names_cache] allocated by task 22: [ 69.026389][ T22] getname_kernel+0x4e/0x370 [ 69.026414][ T22] kern_path_locked+0x71/0x320 [ 69.026438][ T22] handle_remove+0xa2/0x5fe [ 69.026462][ T22] devtmpfsd+0x1b9/0x2a3 [ 69.026483][ T22] kthread+0x3e5/0x4d0 [ 69.026505][ T22] ret_from_fork+0x1f/0x30 [ 69.026527][ T22] [ 69.026527][ T22] freed by task 22: [ 69.026555][ T22] putname.part.0+0xe1/0x120 [ 69.026577][ T22] kern_path_locked+0xc2/0x320 [ 69.026601][ T22] handle_remove+0xa2/0x5fe [ 69.026626][ T22] devtmpfsd+0x1b9/0x2a3 [ 69.026646][ T22] kthread+0x3e5/0x4d0 [ 69.026668][ T22] ret_from_fork+0x1f/0x30 [ 69.026688][ T22] [ 69.026692][ T22] CPU: 1 PID: 22 Comm: kdevtmpfs Not tainted 5.14.0-syzkaller #0 [ 69.026716][ T22] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 69.026730][ T22] RIP: 0010:kvm_fastop_exception+0xf6d/0x105b [ 69.026755][ T22] Code: d3 ed e9 54 03 6f f8 49 8d 0e 48 83 e1 f8 4c 8b 21 41 8d 0e 83 e1 07 c1 e1 03 49 d3 ec e9 aa 10 6f 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 9a 1a 6f f8 bd [ 69.026776][ T22] RSP: 0018:ffffc90000dcfae8 EFLAGS: 00010282 [ 69.026795][ T22] RAX: 0000003461736376 RBX: ffff88806f6feef0 RCX: ffff88823bd7c020 [ 69.026811][ T22] RDX: ffffed100dedfde5 RSI: 0000000000000005 RDI: 0000000000000007 [ 69.026826][ T22] RBP: 0000000000000005 R08: 0000000000000000 R09: ffff88806f6fef20 [ 69.026841][ T22] R10: ffffed100dedfde4 R11: 0000000000000000 R12: ffff88823bd7c020 [ 69.026856][ T22] R13: ffff88823bd7c020 R14: ffff88806f6fef20 R15: dffffc0000000000 [ 69.026873][ T22] FS: 0000000000000000(0000) GS:ffff8880b9d00000(0000) knlGS:0000000000000000 [ 69.026896][ T22] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 [ 69.026913][ T22] CR2: ffff88823bd7c020 CR3: 00000000723c1000 CR4: 00000000001506e0 [ 69.026929][ T22] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 [ 69.026943][ T22] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 [ 69.026958][ T22] Call Trace: [ 69.026971][ T22] d_lookup+0xd8/0x170 [ 69.026999][ T22] lookup_dcache+0x1e/0x130 [ 69.027025][ T22] __lookup_hash+0x29/0x180 [ 69.027052][ T22] kern_path_locked+0x17e/0x320 [ 69.027080][ T22] ? filename_lookup+0x80/0x80 [ 69.027113][ T22] handle_remove+0xa2/0x5fe [ 69.027142][ T22] ? cacheinfo_cpu_online.cold+0x3e/0x3e [ 69.027174][ T22] ? lockdep_hardirqs_on_prepare+0x400/0x400 [ 69.027202][ T22] ? finish_task_switch.isra.0+0x232/0xa50 [ 69.027233][ T22] ? find_held_lock+0x2d/0x110 [ 69.027257][ T22] ? devtmpfsd+0xaa/0x2a3 [ 69.027282][ T22] ? lock_downgrade+0x6e0/0x6e0 [ 69.027311][ T22] ? do_raw_spin_lock+0x120/0x2b0 [ 69.027337][ T22] ? rwlock_bug.part.0+0x90/0x90 [ 69.027366][ T22] devtmpfsd+0x1b9/0x2a3 [ 69.027389][ T22] ? dmar_validate_one_drhd+0x24d/0x24d [ 69.027416][ T22] kthread+0x3e5/0x4d0 [ 69.027440][ T22] ? set_kthread_struct+0x130/0x130 [ 69.027468][ T22] ret_from_fork+0x1f/0x30 [ 69.027501][ T22] ================================================================== [ 69.027511][ T22] Kernel panic - not syncing: panic_on_warn set ... [ 69.027808][ T22] CPU: 1 PID: 22 Comm: kdevtmpfs Not tainted 5.14.0-syzkaller #0 [ 69.027834][ T22] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 69.027849][ T22] Call Trace: [ 69.027857][ T22] dump_stack_lvl+0xcd/0x134 [ 69.027886][ T22] panic+0x2b0/0x6dd [ 69.027910][ T22] ? __warn_printk+0xf3/0xf3 [ 69.027947][ T22] ? kfence_report_error.cold+0x2f3/0xa56 [ 69.027983][ T22] kfence_report_error.cold+0x304/0xa56 [ 69.028013][ T22] ? kvm_fastop_exception+0xf6d/0x105b [ 69.028045][ T22] ? kfence_print_object+0x350/0x350 [ 69.028076][ T22] ? add_lock_to_list.constprop.0+0x185/0x370 [ 69.028103][ T22] ? kvm_fastop_exception+0xf6d/0x105b [ 69.028128][ T22] ? d_lookup+0xd8/0x170 [ 69.028154][ T22] ? lookup_dcache+0x1e/0x130 [ 69.028180][ T22] ? __lookup_hash+0x29/0x180 [ 69.028206][ T22] ? kern_path_locked+0x17e/0x320 [ 69.028235][ T22] ? handle_remove+0xa2/0x5fe [ 69.028263][ T22] ? devtmpfsd+0x1b9/0x2a3 [ 69.028294][ T22] ? kthread+0x3e5/0x4d0 [ 69.028320][ T22] ? ret_from_fork+0x1f/0x30 [ 69.028399][ T22] ? mark_lock+0xef/0x17b0 [ 69.028435][ T22] kfence_handle_page_fault+0x203/0x630 [ 69.028467][ T22] page_fault_oops+0x1c5/0x6b0 [ 69.028492][ T22] ? __sanitizer_cov_trace_const_cmp2+0x22/0x80 [ 69.028520][ T22] ? is_prefetch.constprop.0+0xb7/0x530 [ 69.028547][ T22] ? dump_pagetable+0xc0/0xc0 [ 69.028572][ T22] ? pgtable_bad+0x90/0x90 [ 69.028598][ T22] ? search_bpf_extables+0x1d1/0x2f0 [ 69.028624][ T22] ? kvm_fastop_exception+0xf6d/0x105b [ 69.028656][ T22] kernelmode_fixup_or_oops+0x219/0x280 [ 69.028686][ T22] __bad_area_nosemaphore+0x36d/0x400 [ 69.028713][ T22] ? spurious_kernel_fault+0x38d/0x5b0 [ 69.028745][ T22] do_kern_addr_fault+0x5b/0x70 [ 69.028772][ T22] exc_page_fault+0x155/0x180 [ 69.028799][ T22] asm_exc_page_fault+0x1e/0x30 [ 69.028826][ T22] RIP: 0010:kvm_fastop_exception+0xf6d/0x105b [ 69.028853][ T22] Code: d3 ed e9 54 03 6f f8 49 8d 0e 48 83 e1 f8 4c 8b 21 41 8d 0e 83 e1 07 c1 e1 03 49 d3 ec e9 aa 10 6f 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 9a 1a 6f f8 bd [ 69.028875][ T22] RSP: 0018:ffffc90000dcfae8 EFLAGS: 00010282 [ 69.028896][ T22] RAX: 0000003461736376 RBX: ffff88806f6feef0 RCX: ffff88823bd7c020 [ 69.028914][ T22] RDX: ffffed100dedfde5 RSI: 0000000000000005 RDI: 0000000000000007 [ 69.028930][ T22] RBP: 0000000000000005 R08: 0000000000000000 R09: ffff88806f6fef20 [ 69.028946][ T22] R10: ffffed100dedfde4 R11: 0000000000000000 R12: ffff88823bd7c020 [ 69.028960][ T22] R13: ffff88823bd7c020 R14: ffff88806f6fef20 R15: dffffc0000000000 [ 69.028995][ T22] ? __d_lookup+0x372/0x720 [ 69.029036][ T22] d_lookup+0xd8/0x170 [ 69.029066][ T22] lookup_dcache+0x1e/0x130 [ 69.029094][ T22] __lookup_hash+0x29/0x180 [ 69.029126][ T22] kern_path_locked+0x17e/0x320 [ 69.029154][ T22] ? filename_lookup+0x80/0x80 [ 69.029198][ T22] handle_remove+0xa2/0x5fe [ 69.029231][ T22] ? cacheinfo_cpu_online.cold+0x3e/0x3e [ 69.029267][ T22] ? lockdep_hardirqs_on_prepare+0x400/0x400 [ 69.029304][ T22] ? finish_task_switch.isra.0+0x232/0xa50 [ 69.029345][ T22] ? find_held_lock+0x2d/0x110 [ 69.029376][ T22] ? devtmpfsd+0xaa/0x2a3 [ 69.029403][ T22] ? lock_downgrade+0x6e0/0x6e0 [ 69.029430][ T22] ? do_raw_spin_lock+0x120/0x2b0 [ 69.029459][ T22] ? rwlock_bug.part.0+0x90/0x90 [ 69.029499][ T22] devtmpfsd+0x1b9/0x2a3 [ 69.029529][ T22] ? dmar_validate_one_drhd+0x24d/0x24d [ 69.029562][ T22] kthread+0x3e5/0x4d0 [ 69.029590][ T22] ? set_kthread_struct+0x130/0x130 [ 69.029623][ T22] ret_from_fork+0x1f/0x30 [ 69.029846][ T22] Kernel Offset: disabled