[ 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. [ 63.851735][ T22] ================================================================== [ 63.851748][ T22] BUG: KFENCE: use-after-free read in kvm_fastop_exception+0xf6a/0x1058 [ 63.851748][ T22] [ 63.851785][ T22] Use-after-free read at 0xffff88823bcf4020 (in kfence-#121): [ 63.851800][ T22] kvm_fastop_exception+0xf6a/0x1058 [ 63.851821][ T22] d_lookup+0xd8/0x170 [ 63.851843][ T22] lookup_dcache+0x1e/0x130 [ 63.851865][ T22] __lookup_hash+0x29/0x180 [ 63.851887][ T22] kern_path_locked+0x17e/0x320 [ 63.851920][ T22] handle_remove+0xa2/0x5fe [ 63.851945][ T22] devtmpfsd+0x1b9/0x2a3 [ 63.851966][ T22] kthread+0x3e5/0x4d0 [ 63.851990][ T22] ret_from_fork+0x1f/0x30 [ 63.852013][ T22] [ 63.852017][ T22] kfence-#121 [0xffff88823bcf4000-0xffff88823bcf4fff, size=4096, cache=names_cache] allocated by task 22: [ 63.852055][ T22] getname_kernel+0x4e/0x370 [ 63.852075][ T22] kern_path_locked+0x71/0x320 [ 63.852096][ T22] handle_remove+0xa2/0x5fe [ 63.852117][ T22] devtmpfsd+0x1b9/0x2a3 [ 63.852136][ T22] kthread+0x3e5/0x4d0 [ 63.852155][ T22] ret_from_fork+0x1f/0x30 [ 63.852173][ T22] [ 63.852173][ T22] freed by task 22: [ 63.852198][ T22] putname.part.0+0xe1/0x120 [ 63.852217][ T22] kern_path_locked+0xc2/0x320 [ 63.852237][ T22] handle_remove+0xa2/0x5fe [ 63.852258][ T22] devtmpfsd+0x1b9/0x2a3 [ 63.852275][ T22] kthread+0x3e5/0x4d0 [ 63.852294][ T22] ret_from_fork+0x1f/0x30 [ 63.852313][ T22] [ 63.852318][ T22] CPU: 0 PID: 22 Comm: kdevtmpfs Not tainted 5.14.0-syzkaller #0 [ 63.852339][ T22] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 63.852350][ T22] RIP: 0010:kvm_fastop_exception+0xf6a/0x1058 [ 63.852372][ 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 [ 63.852391][ T22] RSP: 0018:ffffc90000dcfae8 EFLAGS: 00010282 [ 63.852409][ T22] RAX: 0000000036736376 RBX: ffff88806e2634d0 RCX: ffff88823bcf4020 [ 63.852425][ T22] RDX: ffffed100dc4c6a1 RSI: 0000000000000004 RDI: 0000000000000007 [ 63.852439][ T22] RBP: 0000000000000004 R08: 0000000000000000 R09: ffff88806e263500 [ 63.852453][ T22] R10: ffffed100dc4c6a0 R11: 0000000000000000 R12: ffff88823bcf4020 [ 63.852466][ T22] R13: ffff88823bcf4020 R14: ffff88806e263500 R15: dffffc0000000000 [ 63.852482][ T22] FS: 0000000000000000(0000) GS:ffff8880b9c00000(0000) knlGS:0000000000000000 [ 63.852504][ T22] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 [ 63.852519][ T22] CR2: ffff88823bcf4020 CR3: 000000000b68e000 CR4: 00000000001506f0 [ 63.852533][ T22] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 [ 63.852546][ T22] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 [ 63.852559][ T22] Call Trace: [ 63.852571][ T22] d_lookup+0xd8/0x170 [ 63.852596][ T22] lookup_dcache+0x1e/0x130 [ 63.852620][ T22] __lookup_hash+0x29/0x180 [ 63.852646][ T22] kern_path_locked+0x17e/0x320 [ 63.852673][ T22] ? filename_lookup+0x80/0x80 [ 63.852705][ T22] handle_remove+0xa2/0x5fe [ 63.852732][ T22] ? cacheinfo_cpu_online.cold+0x3e/0x3e [ 63.852760][ T22] ? lockdep_hardirqs_on_prepare+0x400/0x400 [ 63.852784][ T22] ? finish_task_switch.isra.0+0x232/0xa50 [ 63.852812][ T22] ? find_held_lock+0x2d/0x110 [ 63.852834][ T22] ? devtmpfsd+0xaa/0x2a3 [ 63.852857][ T22] ? lock_downgrade+0x6e0/0x6e0 [ 63.852879][ T22] ? do_raw_spin_lock+0x120/0x2b0 [ 63.852910][ T22] ? rwlock_bug.part.0+0x90/0x90 [ 63.852937][ T22] devtmpfsd+0x1b9/0x2a3 [ 63.852961][ T22] ? dmar_validate_one_drhd+0x24d/0x24d [ 63.852988][ T22] kthread+0x3e5/0x4d0 [ 63.853012][ T22] ? set_kthread_struct+0x130/0x130 [ 63.853039][ T22] ret_from_fork+0x1f/0x30 [ 63.853070][ T22] ================================================================== [ 63.853078][ T22] Kernel panic - not syncing: panic_on_warn set ... [ 63.853357][ T22] CPU: 0 PID: 22 Comm: kdevtmpfs Not tainted 5.14.0-syzkaller #0 [ 63.853381][ T22] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 63.853394][ T22] Call Trace: [ 63.853402][ T22] dump_stack_lvl+0xcd/0x134 [ 63.853429][ T22] panic+0x2b0/0x6dd [ 63.853452][ T22] ? __warn_printk+0xf3/0xf3 [ 63.853487][ T22] ? kfence_report_error.cold+0x2f3/0xa56 [ 63.853520][ T22] kfence_report_error.cold+0x304/0xa56 [ 63.853548][ T22] ? kvm_fastop_exception+0xf6a/0x1058 [ 63.853577][ T22] ? kfence_print_object+0x350/0x350 [ 63.853608][ T22] ? add_lock_to_list.constprop.0+0x185/0x370 [ 63.853633][ T22] ? kvm_fastop_exception+0xf6a/0x1058 [ 63.853655][ T22] ? d_lookup+0xd8/0x170 [ 63.853680][ T22] ? lookup_dcache+0x1e/0x130 [ 63.853705][ T22] ? __lookup_hash+0x29/0x180 [ 63.853731][ T22] ? kern_path_locked+0x17e/0x320 [ 63.853758][ T22] ? handle_remove+0xa2/0x5fe [ 63.853785][ T22] ? devtmpfsd+0x1b9/0x2a3 [ 63.853808][ T22] ? kthread+0x3e5/0x4d0 [ 63.853833][ T22] ? ret_from_fork+0x1f/0x30 [ 63.853916][ T22] ? mark_lock+0xef/0x17b0 [ 63.853955][ T22] kfence_handle_page_fault+0x203/0x630 [ 63.853991][ T22] page_fault_oops+0x1c5/0x6b0 [ 63.854015][ T22] ? __sanitizer_cov_trace_const_cmp2+0x22/0x80 [ 63.854044][ T22] ? is_prefetch.constprop.0+0xb7/0x530 [ 63.854069][ T22] ? dump_pagetable+0xc0/0xc0 [ 63.854094][ T22] ? pgtable_bad+0x90/0x90 [ 63.854122][ T22] ? search_bpf_extables+0x1d1/0x2f0 [ 63.854147][ T22] ? kvm_fastop_exception+0xf6a/0x1058 [ 63.854178][ T22] kernelmode_fixup_or_oops+0x219/0x280 [ 63.854207][ T22] __bad_area_nosemaphore+0x36d/0x400 [ 63.854233][ T22] ? spurious_kernel_fault+0x38d/0x5b0 [ 63.854263][ T22] do_kern_addr_fault+0x5b/0x70 [ 63.854291][ T22] exc_page_fault+0x155/0x180 [ 63.854318][ T22] asm_exc_page_fault+0x1e/0x30 [ 63.854344][ T22] RIP: 0010:kvm_fastop_exception+0xf6a/0x1058 [ 63.854369][ 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 [ 63.854391][ T22] RSP: 0018:ffffc90000dcfae8 EFLAGS: 00010282 [ 63.854411][ T22] RAX: 0000000036736376 RBX: ffff88806e2634d0 RCX: ffff88823bcf4020 [ 63.854428][ T22] RDX: ffffed100dc4c6a1 RSI: 0000000000000004 RDI: 0000000000000007 [ 63.854443][ T22] RBP: 0000000000000004 R08: 0000000000000000 R09: ffff88806e263500 [ 63.854458][ T22] R10: ffffed100dc4c6a0 R11: 0000000000000000 R12: ffff88823bcf4020 [ 63.854474][ T22] R13: ffff88823bcf4020 R14: ffff88806e263500 R15: dffffc0000000000 [ 63.854511][ T22] ? __d_lookup+0x372/0x720 [ 63.854551][ T22] d_lookup+0xd8/0x170 [ 63.854581][ T22] lookup_dcache+0x1e/0x130 [ 63.854609][ T22] __lookup_hash+0x29/0x180 [ 63.854640][ T22] kern_path_locked+0x17e/0x320 [ 63.854670][ T22] ? filename_lookup+0x80/0x80 [ 63.854715][ T22] handle_remove+0xa2/0x5fe [ 63.854748][ T22] ? cacheinfo_cpu_online.cold+0x3e/0x3e [ 63.854784][ T22] ? lockdep_hardirqs_on_prepare+0x400/0x400 [ 63.854812][ T22] ? finish_task_switch.isra.0+0x232/0xa50 [ 63.854851][ T22] ? find_held_lock+0x2d/0x110 [ 63.854881][ T22] ? devtmpfsd+0xaa/0x2a3 [ 63.854912][ T22] ? lock_downgrade+0x6e0/0x6e0 [ 63.854937][ T22] ? do_raw_spin_lock+0x120/0x2b0 [ 63.854966][ T22] ? rwlock_bug.part.0+0x90/0x90 [ 63.855004][ T22] devtmpfsd+0x1b9/0x2a3 [ 63.855033][ T22] ? dmar_validate_one_drhd+0x24d/0x24d [ 63.855064][ T22] kthread+0x3e5/0x4d0 [ 63.855090][ T22] ? set_kthread_struct+0x130/0x130 [ 63.855122][ T22] ret_from_fork+0x1f/0x30 [ 63.855518][ T22] Kernel Offset: disabled