[ OK ] Started Getty on tty2. Starting Load/Save RF Kill Switch Status... [ OK ] Started Getty on tty1. [ OK ] Started Serial Getty on ttyS0. [ 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 Load/Save RF Kill Switch Status. [ OK ] Started Update UTMP about System Runlevel Changes. [ 67.731642][ T22] ================================================================== [ 67.731655][ T22] BUG: KFENCE: use-after-free read in kvm_fastop_exception+0xf6a/0x1058 [ 67.731655][ T22] [ 67.731706][ T22] Use-after-free read at 0xffff88823bd5c020 (in kfence-#173): [ 67.731722][ T22] kvm_fastop_exception+0xf6a/0x1058 [ 67.731744][ T22] d_lookup+0xd8/0x170 [ 67.731768][ T22] lookup_dcache+0x1e/0x130 [ 67.731791][ T22] __lookup_hash+0x29/0x180 [ 67.731814][ T22] kern_path_locked+0x17e/0x320 [ 67.731839][ T22] handle_remove+0xa2/0x5fe [ 67.731865][ T22] devtmpfsd+0x1b9/0x2a3 [ 67.731893][ T22] kthread+0x3e5/0x4d0 [ 67.731916][ T22] ret_from_fork+0x1f/0x30 [ 67.731938][ T22] [ 67.731942][ T22] kfence-#173 [0xffff88823bd5c000-0xffff88823bd5cfff, size=4096, cache=names_cache] allocated by task 22: [ 67.731983][ T22] getname_kernel+0x4e/0x370 [ 67.732006][ T22] kern_path_locked+0x71/0x320 [ 67.732030][ T22] handle_remove+0xa2/0x5fe [ 67.732052][ T22] devtmpfsd+0x1b9/0x2a3 [ 67.732072][ T22] kthread+0x3e5/0x4d0 [ 67.732092][ T22] ret_from_fork+0x1f/0x30 [ 67.732114][ T22] [ 67.732114][ T22] freed by task 22: [ 67.732141][ T22] putname.part.0+0xe1/0x120 [ 67.732163][ T22] kern_path_locked+0xc2/0x320 [ 67.732185][ T22] handle_remove+0xa2/0x5fe [ 67.732209][ T22] devtmpfsd+0x1b9/0x2a3 [ 67.732228][ T22] kthread+0x3e5/0x4d0 [ 67.732249][ T22] ret_from_fork+0x1f/0x30 [ 67.732270][ T22] [ 67.732275][ T22] CPU: 1 PID: 22 Comm: kdevtmpfs Not tainted 5.14.0-syzkaller #0 [ 67.732299][ T22] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 67.732311][ T22] RIP: 0010:kvm_fastop_exception+0xf6a/0x1058 [ 67.732336][ T22] Code: d3 ed e9 ef d4 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 45 e2 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 35 ec 6e f8 bd [ 67.732358][ T22] RSP: 0018:ffffc90000dcfae8 EFLAGS: 00010282 [ 67.732378][ T22] RAX: 0000000033736376 RBX: ffff88807cc28620 RCX: ffff88823bd5c020 [ 67.732394][ T22] RDX: ffffed100f9850cb RSI: 0000000000000004 RDI: 0000000000000007 [ 67.732408][ T22] RBP: 0000000000000004 R08: 0000000000000000 R09: ffff88807cc28650 [ 67.732422][ T22] R10: ffffed100f9850ca R11: 0000000000000000 R12: ffff88823bd5c020 [ 67.732437][ T22] R13: ffff88823bd5c020 R14: ffff88807cc28650 R15: dffffc0000000000 [ 67.732453][ T22] FS: 0000000000000000(0000) GS:ffff8880b9d00000(0000) knlGS:0000000000000000 [ 67.732476][ T22] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 [ 67.732492][ T22] CR2: ffff88823bd5c020 CR3: 000000000b68e000 CR4: 00000000001506e0 [ 67.732508][ T22] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 [ 67.732521][ T22] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 [ 67.732535][ T22] Call Trace: [ 67.732547][ T22] d_lookup+0xd8/0x170 [ 67.732573][ T22] lookup_dcache+0x1e/0x130 [ 67.732598][ T22] __lookup_hash+0x29/0x180 [ 67.732625][ T22] kern_path_locked+0x17e/0x320 [ 67.732652][ T22] ? filename_lookup+0x80/0x80 [ 67.732683][ T22] handle_remove+0xa2/0x5fe [ 67.732713][ T22] ? cacheinfo_cpu_online.cold+0x3e/0x3e [ 67.732743][ T22] ? lockdep_hardirqs_on_prepare+0x400/0x400 [ 67.732769][ T22] ? finish_task_switch.isra.0+0x232/0xa50 [ 67.732798][ T22] ? find_held_lock+0x2d/0x110 [ 67.732821][ T22] ? devtmpfsd+0xaa/0x2a3 [ 67.732844][ T22] ? lock_downgrade+0x6e0/0x6e0 [ 67.732867][ T22] ? do_raw_spin_lock+0x120/0x2b0 [ 67.732899][ T22] ? rwlock_bug.part.0+0x90/0x90 [ 67.732926][ T22] devtmpfsd+0x1b9/0x2a3 [ 67.732950][ T22] ? dmar_validate_one_drhd+0x24d/0x24d [ 67.732977][ T22] kthread+0x3e5/0x4d0 [ 67.733001][ T22] ? set_kthread_struct+0x130/0x130 [ 67.733028][ T22] ret_from_fork+0x1f/0x30 [ 67.733058][ T22] ================================================================== [ 67.733067][ T22] Kernel panic - not syncing: panic_on_warn set ... [ 67.733317][ T22] CPU: 1 PID: 22 Comm: kdevtmpfs Not tainted 5.14.0-syzkaller #0 [ 67.733342][ T22] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 67.733355][ T22] Call Trace: [ 67.733363][ T22] dump_stack_lvl+0xcd/0x134 [ 67.733393][ T22] panic+0x2b0/0x6dd [ 67.733418][ T22] ? __warn_printk+0xf3/0xf3 [ 67.733453][ T22] ? kfence_report_error.cold+0x2f3/0xa56 [ 67.733488][ T22] kfence_report_error.cold+0x304/0xa56 [ 67.733514][ T22] ? kvm_fastop_exception+0xf6a/0x1058 [ 67.733544][ T22] ? kfence_print_object+0x350/0x350 [ 67.733575][ T22] ? add_lock_to_list.constprop.0+0x185/0x370 [ 67.733601][ T22] ? kvm_fastop_exception+0xf6a/0x1058 [ 67.733623][ T22] ? d_lookup+0xd8/0x170 [ 67.733648][ T22] ? lookup_dcache+0x1e/0x130 [ 67.733673][ T22] ? __lookup_hash+0x29/0x180 [ 67.733699][ T22] ? kern_path_locked+0x17e/0x320 [ 67.733727][ T22] ? handle_remove+0xa2/0x5fe [ 67.733755][ T22] ? devtmpfsd+0x1b9/0x2a3 [ 67.733779][ T22] ? kthread+0x3e5/0x4d0 [ 67.733805][ T22] ? ret_from_fork+0x1f/0x30 [ 67.733890][ T22] ? mark_lock+0xef/0x17b0 [ 67.733931][ T22] kfence_handle_page_fault+0x203/0x630 [ 67.733968][ T22] page_fault_oops+0x1c5/0x6b0 [ 67.733994][ T22] ? __sanitizer_cov_trace_const_cmp2+0x22/0x80 [ 67.734025][ T22] ? is_prefetch.constprop.0+0xb7/0x530 [ 67.734052][ T22] ? dump_pagetable+0xc0/0xc0 [ 67.734078][ T22] ? pgtable_bad+0x90/0x90 [ 67.734106][ T22] ? search_bpf_extables+0x1d1/0x2f0 [ 67.734132][ T22] ? kvm_fastop_exception+0xf6a/0x1058 [ 67.734166][ T22] kernelmode_fixup_or_oops+0x219/0x280 [ 67.734198][ T22] __bad_area_nosemaphore+0x36d/0x400 [ 67.734226][ T22] ? spurious_kernel_fault+0x38d/0x5b0 [ 67.734259][ T22] do_kern_addr_fault+0x5b/0x70 [ 67.734287][ T22] exc_page_fault+0x155/0x180 [ 67.734316][ T22] asm_exc_page_fault+0x1e/0x30 [ 67.734343][ T22] RIP: 0010:kvm_fastop_exception+0xf6a/0x1058 [ 67.734371][ T22] Code: d3 ed e9 ef d4 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 45 e2 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 35 ec 6e f8 bd [ 67.734393][ T22] RSP: 0018:ffffc90000dcfae8 EFLAGS: 00010282 [ 67.734416][ T22] RAX: 0000000033736376 RBX: ffff88807cc28620 RCX: ffff88823bd5c020 [ 67.734434][ T22] RDX: ffffed100f9850cb RSI: 0000000000000004 RDI: 0000000000000007 [ 67.734450][ T22] RBP: 0000000000000004 R08: 0000000000000000 R09: ffff88807cc28650 [ 67.734466][ T22] R10: ffffed100f9850ca R11: 0000000000000000 R12: ffff88823bd5c020 [ 67.734483][ T22] R13: ffff88823bd5c020 R14: ffff88807cc28650 R15: dffffc0000000000 [ 67.734521][ T22] ? __d_lookup+0x372/0x720 [ 67.734563][ T22] d_lookup+0xd8/0x170 [ 67.734593][ T22] lookup_dcache+0x1e/0x130 [ 67.734622][ T22] __lookup_hash+0x29/0x180 [ 67.734654][ T22] kern_path_locked+0x17e/0x320 [ 67.734685][ T22] ? filename_lookup+0x80/0x80 [ 67.734730][ T22] handle_remove+0xa2/0x5fe [ 67.734764][ T22] ? cacheinfo_cpu_online.cold+0x3e/0x3e [ 67.734801][ T22] ? lockdep_hardirqs_on_prepare+0x400/0x400 [ 67.734831][ T22] ? finish_task_switch.isra.0+0x232/0xa50 [ 67.734871][ T22] ? find_held_lock+0x2d/0x110 [ 67.734908][ T22] ? devtmpfsd+0xaa/0x2a3 [ 67.734935][ T22] ? lock_downgrade+0x6e0/0x6e0 [ 67.734962][ T22] ? do_raw_spin_lock+0x120/0x2b0 [ 67.734992][ T22] ? rwlock_bug.part.0+0x90/0x90 [ 67.735031][ T22] devtmpfsd+0x1b9/0x2a3 [ 67.735060][ T22] ? dmar_validate_one_drhd+0x24d/0x24d [ 67.735093][ T22] kthread+0x3e5/0x4d0 [ 67.735120][ T22] ? set_kthread_struct+0x130/0x130 [ 67.735154][ T22] ret_from_fork+0x1f/0x30 [ 67.735569][ T22] Kernel Offset: disabled