[ OK ] Started Getty on tty4. [ OK ] Started Getty on tty3. [ OK ] Started Getty on tty2. [ 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 Update UTMP about System Runlevel Changes. [ 66.617555][ T22] ================================================================== [ 66.617568][ T22] BUG: KFENCE: use-after-free read in kvm_fastop_exception+0xf6d/0x105b [ 66.617568][ T22] [ 66.617601][ T22] Use-after-free read at 0xffff88823bd40020 (in kfence-#159): [ 66.617615][ T22] kvm_fastop_exception+0xf6d/0x105b [ 66.617633][ T22] d_lookup+0xd8/0x170 [ 66.617653][ T22] lookup_dcache+0x1e/0x130 [ 66.617673][ T22] __lookup_hash+0x29/0x180 [ 66.617692][ T22] kern_path_locked+0x17e/0x320 [ 66.617713][ T22] handle_remove+0xa2/0x5fe [ 66.617736][ T22] devtmpfsd+0x1b9/0x2a3 [ 66.617755][ T22] kthread+0x3e5/0x4d0 [ 66.617774][ T22] ret_from_fork+0x1f/0x30 [ 66.617794][ T22] [ 66.617798][ T22] kfence-#159 [0xffff88823bd40000-0xffff88823bd40fff, size=4096, cache=names_cache] allocated by task 22: [ 66.617839][ T22] getname_kernel+0x4e/0x370 [ 66.617859][ T22] kern_path_locked+0x71/0x320 [ 66.617880][ T22] handle_remove+0xa2/0x5fe [ 66.617899][ T22] devtmpfsd+0x1b9/0x2a3 [ 66.617916][ T22] kthread+0x3e5/0x4d0 [ 66.617934][ T22] ret_from_fork+0x1f/0x30 [ 66.617952][ T22] [ 66.617952][ T22] freed by task 22: [ 66.617976][ T22] putname.part.0+0xe1/0x120 [ 66.617994][ T22] kern_path_locked+0xc2/0x320 [ 66.618015][ T22] handle_remove+0xa2/0x5fe [ 66.618034][ T22] devtmpfsd+0x1b9/0x2a3 [ 66.618051][ T22] kthread+0x3e5/0x4d0 [ 66.618069][ T22] ret_from_fork+0x1f/0x30 [ 66.618087][ T22] [ 66.618091][ T22] CPU: 1 PID: 22 Comm: kdevtmpfs Not tainted 5.14.0-syzkaller #0 [ 66.618112][ T22] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 66.618124][ T22] RIP: 0010:kvm_fastop_exception+0xf6d/0x105b [ 66.618145][ T22] Code: d3 ed e9 8c e3 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 e2 f0 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 d2 fa 6e f8 bd [ 66.618164][ T22] RSP: 0018:ffffc90000dcfae8 EFLAGS: 00010282 [ 66.618181][ T22] RAX: 0000003575736376 RBX: ffff88806e572798 RCX: ffff88823bd40020 [ 66.618196][ T22] RDX: ffffed100dcae4fa RSI: 0000000000000005 RDI: 0000000000000007 [ 66.618209][ T22] RBP: 0000000000000005 R08: 0000000000000000 R09: ffff88806e5727c8 [ 66.618222][ T22] R10: ffffed100dcae4f9 R11: 0000000000000000 R12: ffff88823bd40020 [ 66.618235][ T22] R13: ffff88823bd40020 R14: ffff88806e5727c8 R15: dffffc0000000000 [ 66.618250][ T22] FS: 0000000000000000(0000) GS:ffff8880b9d00000(0000) knlGS:0000000000000000 [ 66.618270][ T22] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 [ 66.618284][ T22] CR2: ffff88823bd40020 CR3: 0000000018d8d000 CR4: 00000000001506e0 [ 66.618297][ T22] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 [ 66.618310][ T22] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 [ 66.618322][ T22] Call Trace: [ 66.618332][ T22] d_lookup+0xd8/0x170 [ 66.618355][ T22] lookup_dcache+0x1e/0x130 [ 66.618376][ T22] __lookup_hash+0x29/0x180 [ 66.618398][ T22] kern_path_locked+0x17e/0x320 [ 66.618421][ T22] ? filename_lookup+0x80/0x80 [ 66.618448][ T22] handle_remove+0xa2/0x5fe [ 66.618471][ T22] ? cacheinfo_cpu_online.cold+0x3e/0x3e [ 66.618497][ T22] ? lockdep_hardirqs_on_prepare+0x400/0x400 [ 66.618520][ T22] ? finish_task_switch.isra.0+0x232/0xa50 [ 66.618546][ T22] ? find_held_lock+0x2d/0x110 [ 66.618566][ T22] ? devtmpfsd+0xaa/0x2a3 [ 66.618586][ T22] ? lock_downgrade+0x6e0/0x6e0 [ 66.618605][ T22] ? do_raw_spin_lock+0x120/0x2b0 [ 66.618627][ T22] ? rwlock_bug.part.0+0x90/0x90 [ 66.618652][ T22] devtmpfsd+0x1b9/0x2a3 [ 66.618672][ T22] ? dmar_validate_one_drhd+0x24d/0x24d [ 66.618695][ T22] kthread+0x3e5/0x4d0 [ 66.618715][ T22] ? set_kthread_struct+0x130/0x130 [ 66.618739][ T22] ret_from_fork+0x1f/0x30 [ 66.618765][ T22] ================================================================== [ 66.618773][ T22] Kernel panic - not syncing: panic_on_warn set ... [ 66.619003][ T22] CPU: 1 PID: 22 Comm: kdevtmpfs Not tainted 5.14.0-syzkaller #0 [ 66.619024][ T22] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 66.619036][ T22] Call Trace: [ 66.619043][ T22] dump_stack_lvl+0xcd/0x134 [ 66.619066][ T22] panic+0x2b0/0x6dd [ 66.619086][ T22] ? __warn_printk+0xf3/0xf3 [ 66.619116][ T22] ? kfence_report_error.cold+0x2f3/0xa56 [ 66.619151][ T22] kfence_report_error.cold+0x304/0xa56 [ 66.619181][ T22] ? kvm_fastop_exception+0xf6d/0x105b [ 66.619206][ T22] ? kfence_print_object+0x350/0x350 [ 66.619232][ T22] ? add_lock_to_list.constprop.0+0x185/0x370 [ 66.619254][ T22] ? kvm_fastop_exception+0xf6d/0x105b [ 66.619274][ T22] ? d_lookup+0xd8/0x170 [ 66.619295][ T22] ? lookup_dcache+0x1e/0x130 [ 66.619317][ T22] ? __lookup_hash+0x29/0x180 [ 66.619339][ T22] ? kern_path_locked+0x17e/0x320 [ 66.619363][ T22] ? handle_remove+0xa2/0x5fe [ 66.619385][ T22] ? devtmpfsd+0x1b9/0x2a3 [ 66.619405][ T22] ? kthread+0x3e5/0x4d0 [ 66.619426][ T22] ? ret_from_fork+0x1f/0x30 [ 66.619491][ T22] ? mark_lock+0xef/0x17b0 [ 66.619524][ T22] kfence_handle_page_fault+0x203/0x630 [ 66.619554][ T22] page_fault_oops+0x1c5/0x6b0 [ 66.619577][ T22] ? __sanitizer_cov_trace_const_cmp2+0x22/0x80 [ 66.619602][ T22] ? is_prefetch.constprop.0+0xb7/0x530 [ 66.619625][ T22] ? dump_pagetable+0xc0/0xc0 [ 66.619647][ T22] ? pgtable_bad+0x90/0x90 [ 66.619671][ T22] ? search_bpf_extables+0x1d1/0x2f0 [ 66.619693][ T22] ? kvm_fastop_exception+0xf6d/0x105b [ 66.619721][ T22] kernelmode_fixup_or_oops+0x219/0x280 [ 66.619747][ T22] __bad_area_nosemaphore+0x36d/0x400 [ 66.619771][ T22] ? spurious_kernel_fault+0x38d/0x5b0 [ 66.619797][ T22] do_kern_addr_fault+0x5b/0x70 [ 66.619821][ T22] exc_page_fault+0x155/0x180 [ 66.619853][ T22] asm_exc_page_fault+0x1e/0x30 [ 66.619876][ T22] RIP: 0010:kvm_fastop_exception+0xf6d/0x105b [ 66.619898][ T22] Code: d3 ed e9 8c e3 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 e2 f0 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 d2 fa 6e f8 bd [ 66.619918][ T22] RSP: 0018:ffffc90000dcfae8 EFLAGS: 00010282 [ 66.619936][ T22] RAX: 0000003575736376 RBX: ffff88806e572798 RCX: ffff88823bd40020 [ 66.619952][ T22] RDX: ffffed100dcae4fa RSI: 0000000000000005 RDI: 0000000000000007 [ 66.619966][ T22] RBP: 0000000000000005 R08: 0000000000000000 R09: ffff88806e5727c8 [ 66.619980][ T22] R10: ffffed100dcae4f9 R11: 0000000000000000 R12: ffff88823bd40020 [ 66.619994][ T22] R13: ffff88823bd40020 R14: ffff88806e5727c8 R15: dffffc0000000000 [ 66.620026][ T22] ? __d_lookup+0x372/0x720 [ 66.620060][ T22] d_lookup+0xd8/0x170 [ 66.620085][ T22] lookup_dcache+0x1e/0x130 [ 66.620109][ T22] __lookup_hash+0x29/0x180 [ 66.620135][ T22] kern_path_locked+0x17e/0x320 [ 66.620161][ T22] ? filename_lookup+0x80/0x80 [ 66.620198][ T22] handle_remove+0xa2/0x5fe [ 66.620225][ T22] ? cacheinfo_cpu_online.cold+0x3e/0x3e [ 66.620256][ T22] ? lockdep_hardirqs_on_prepare+0x400/0x400 [ 66.620281][ T22] ? finish_task_switch.isra.0+0x232/0xa50 [ 66.620314][ T22] ? find_held_lock+0x2d/0x110 [ 66.620340][ T22] ? devtmpfsd+0xaa/0x2a3 [ 66.620362][ T22] ? lock_downgrade+0x6e0/0x6e0 [ 66.620384][ T22] ? do_raw_spin_lock+0x120/0x2b0 [ 66.620408][ T22] ? rwlock_bug.part.0+0x90/0x90 [ 66.620440][ T22] devtmpfsd+0x1b9/0x2a3 [ 66.620464][ T22] ? dmar_validate_one_drhd+0x24d/0x24d [ 66.620491][ T22] kthread+0x3e5/0x4d0 [ 66.620513][ T22] ? set_kthread_struct+0x130/0x130 [ 66.620540][ T22] ret_from_fork+0x1f/0x30 [ 66.620918][ T22] Kernel Offset: disabled