[ 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. Starting Load/Save RF Kill Switch Status... [ OK ] Started Load/Save RF Kill Switch Status. [ 63.568660][ T22] ================================================================== [ 63.568673][ T22] BUG: KFENCE: use-after-free read in kvm_fastop_exception+0xf6a/0x1058 [ 63.568673][ T22] [ 63.568714][ T22] Use-after-free read at 0xffff88823bcee020 (in kfence-#118): [ 63.568727][ T22] kvm_fastop_exception+0xf6a/0x1058 [ 63.568745][ T22] d_lookup+0xd8/0x170 [ 63.568765][ T22] lookup_dcache+0x1e/0x130 [ 63.568785][ T22] __lookup_hash+0x29/0x180 [ 63.568804][ T22] kern_path_locked+0x17e/0x320 [ 63.568825][ T22] handle_remove+0xa2/0x5fe [ 63.568847][ T22] devtmpfsd+0x1b9/0x2a3 [ 63.568866][ T22] kthread+0x3e5/0x4d0 [ 63.568886][ T22] ret_from_fork+0x1f/0x30 [ 63.568906][ T22] [ 63.568909][ T22] kfence-#118 [0xffff88823bcee000-0xffff88823bceefff, size=4096, cache=names_cache] allocated by task 22: [ 63.568945][ T22] getname_kernel+0x4e/0x370 [ 63.568965][ T22] kern_path_locked+0x71/0x320 [ 63.568985][ T22] handle_remove+0xa2/0x5fe [ 63.569006][ T22] devtmpfsd+0x1b9/0x2a3 [ 63.569022][ T22] kthread+0x3e5/0x4d0 [ 63.569040][ T22] ret_from_fork+0x1f/0x30 [ 63.569058][ T22] [ 63.569058][ T22] freed by task 22: [ 63.569081][ T22] putname.part.0+0xe1/0x120 [ 63.569099][ T22] kern_path_locked+0xc2/0x320 [ 63.569119][ T22] handle_remove+0xa2/0x5fe [ 63.569139][ T22] devtmpfsd+0x1b9/0x2a3 [ 63.569161][ T22] kthread+0x3e5/0x4d0 [ 63.569179][ T22] ret_from_fork+0x1f/0x30 [ 63.569197][ T22] [ 63.569201][ T22] CPU: 0 PID: 22 Comm: kdevtmpfs Not tainted 5.14.0-syzkaller #0 [ 63.569220][ T22] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 63.569231][ T22] RIP: 0010:kvm_fastop_exception+0xf6a/0x1058 [ 63.569251][ 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 [ 63.569269][ T22] RSP: 0018:ffffc90000dcfae8 EFLAGS: 00010282 [ 63.569285][ T22] RAX: 0000000034736376 RBX: ffff88806ef84330 RCX: ffff88823bcee020 [ 63.569299][ T22] RDX: ffffed100ddf086d RSI: 0000000000000004 RDI: 0000000000000007 [ 63.569311][ T22] RBP: 0000000000000004 R08: 0000000000000000 R09: ffff88806ef84360 [ 63.569322][ T22] R10: ffffed100ddf086c R11: 0000000000000000 R12: ffff88823bcee020 [ 63.569335][ T22] R13: ffff88823bcee020 R14: ffff88806ef84360 R15: dffffc0000000000 [ 63.569348][ T22] FS: 0000000000000000(0000) GS:ffff8880b9c00000(0000) knlGS:0000000000000000 [ 63.569368][ T22] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 [ 63.569381][ T22] CR2: ffff88823bcee020 CR3: 0000000071d09000 CR4: 00000000001506f0 [ 63.569393][ T22] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 [ 63.569404][ T22] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 [ 63.569416][ T22] Call Trace: [ 63.569426][ T22] d_lookup+0xd8/0x170 [ 63.569447][ T22] lookup_dcache+0x1e/0x130 [ 63.569469][ T22] __lookup_hash+0x29/0x180 [ 63.569490][ T22] kern_path_locked+0x17e/0x320 [ 63.569513][ T22] ? filename_lookup+0x80/0x80 [ 63.569540][ T22] handle_remove+0xa2/0x5fe [ 63.569563][ T22] ? cacheinfo_cpu_online.cold+0x3e/0x3e [ 63.569588][ T22] ? lockdep_hardirqs_on_prepare+0x400/0x400 [ 63.569611][ T22] ? finish_task_switch.isra.0+0x232/0xa50 [ 63.569635][ T22] ? find_held_lock+0x2d/0x110 [ 63.569654][ T22] ? devtmpfsd+0xaa/0x2a3 [ 63.569674][ T22] ? lock_downgrade+0x6e0/0x6e0 [ 63.569693][ T22] ? do_raw_spin_lock+0x120/0x2b0 [ 63.569714][ T22] ? rwlock_bug.part.0+0x90/0x90 [ 63.569738][ T22] devtmpfsd+0x1b9/0x2a3 [ 63.569758][ T22] ? dmar_validate_one_drhd+0x24d/0x24d [ 63.569780][ T22] kthread+0x3e5/0x4d0 [ 63.569801][ T22] ? set_kthread_struct+0x130/0x130 [ 63.569824][ T22] ret_from_fork+0x1f/0x30 [ 63.569850][ T22] ================================================================== [ 63.569857][ T22] Kernel panic - not syncing: panic_on_warn set ... [ 63.570022][ T22] CPU: 0 PID: 22 Comm: kdevtmpfs Not tainted 5.14.0-syzkaller #0 [ 63.570041][ T22] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 63.570052][ T22] Call Trace: [ 63.570058][ T22] dump_stack_lvl+0xcd/0x134 [ 63.570081][ T22] panic+0x2b0/0x6dd [ 63.570101][ T22] ? __warn_printk+0xf3/0xf3 [ 63.570130][ T22] ? kfence_report_error.cold+0x2f3/0xa56 [ 63.570161][ T22] kfence_report_error.cold+0x304/0xa56 [ 63.570184][ T22] ? kvm_fastop_exception+0xf6a/0x1058 [ 63.570209][ T22] ? kfence_print_object+0x350/0x350 [ 63.570234][ T22] ? add_lock_to_list.constprop.0+0x185/0x370 [ 63.570255][ T22] ? kvm_fastop_exception+0xf6a/0x1058 [ 63.570274][ T22] ? d_lookup+0xd8/0x170 [ 63.570294][ T22] ? lookup_dcache+0x1e/0x130 [ 63.570316][ T22] ? __lookup_hash+0x29/0x180 [ 63.570337][ T22] ? kern_path_locked+0x17e/0x320 [ 63.570361][ T22] ? handle_remove+0xa2/0x5fe [ 63.570384][ T22] ? devtmpfsd+0x1b9/0x2a3 [ 63.570403][ T22] ? kthread+0x3e5/0x4d0 [ 63.570425][ T22] ? ret_from_fork+0x1f/0x30 [ 63.570491][ T22] ? mark_lock+0xef/0x17b0 [ 63.570524][ T22] kfence_handle_page_fault+0x203/0x630 [ 63.570554][ T22] page_fault_oops+0x1c5/0x6b0 [ 63.570575][ T22] ? __sanitizer_cov_trace_const_cmp2+0x22/0x80 [ 63.570600][ T22] ? is_prefetch.constprop.0+0xb7/0x530 [ 63.570621][ T22] ? dump_pagetable+0xc0/0xc0 [ 63.570642][ T22] ? pgtable_bad+0x90/0x90 [ 63.570665][ T22] ? search_bpf_extables+0x1d1/0x2f0 [ 63.570754][ T22] ? kvm_fastop_exception+0xf6a/0x1058 [ 63.570781][ T22] kernelmode_fixup_or_oops+0x219/0x280 [ 63.570809][ T22] __bad_area_nosemaphore+0x36d/0x400 [ 63.570831][ T22] ? spurious_kernel_fault+0x38d/0x5b0 [ 63.570857][ T22] do_kern_addr_fault+0x5b/0x70 [ 63.570879][ T22] exc_page_fault+0x155/0x180 [ 63.570903][ T22] asm_exc_page_fault+0x1e/0x30 [ 63.570926][ T22] RIP: 0010:kvm_fastop_exception+0xf6a/0x1058 [ 63.570947][ 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 [ 63.570966][ T22] RSP: 0018:ffffc90000dcfae8 EFLAGS: 00010282 [ 63.570984][ T22] RAX: 0000000034736376 RBX: ffff88806ef84330 RCX: ffff88823bcee020 [ 63.570999][ T22] RDX: ffffed100ddf086d RSI: 0000000000000004 RDI: 0000000000000007 [ 63.571011][ T22] RBP: 0000000000000004 R08: 0000000000000000 R09: ffff88806ef84360 [ 63.571024][ T22] R10: ffffed100ddf086c R11: 0000000000000000 R12: ffff88823bcee020 [ 63.571037][ T22] R13: ffff88823bcee020 R14: ffff88806ef84360 R15: dffffc0000000000 [ 63.571067][ T22] ? __d_lookup+0x372/0x720 [ 63.571101][ T22] d_lookup+0xd8/0x170 [ 63.571125][ T22] lookup_dcache+0x1e/0x130 [ 63.571149][ T22] __lookup_hash+0x29/0x180 [ 63.571174][ T22] kern_path_locked+0x17e/0x320 [ 63.571200][ T22] ? filename_lookup+0x80/0x80 [ 63.571236][ T22] handle_remove+0xa2/0x5fe [ 63.571265][ T22] ? cacheinfo_cpu_online.cold+0x3e/0x3e [ 63.571294][ T22] ? lockdep_hardirqs_on_prepare+0x400/0x400 [ 63.571318][ T22] ? finish_task_switch.isra.0+0x232/0xa50 [ 63.571349][ T22] ? find_held_lock+0x2d/0x110 [ 63.571373][ T22] ? devtmpfsd+0xaa/0x2a3 [ 63.571395][ T22] ? lock_downgrade+0x6e0/0x6e0 [ 63.571416][ T22] ? do_raw_spin_lock+0x120/0x2b0 [ 63.571439][ T22] ? rwlock_bug.part.0+0x90/0x90 [ 63.571470][ T22] devtmpfsd+0x1b9/0x2a3 [ 63.571493][ T22] ? dmar_validate_one_drhd+0x24d/0x24d [ 63.571519][ T22] kthread+0x3e5/0x4d0 [ 63.571541][ T22] ? set_kthread_struct+0x130/0x130 [ 63.571567][ T22] ret_from_fork+0x1f/0x30 [ 63.571951][ T22] Kernel Offset: disabled