[ 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. [ 67.644849][ T22] ================================================================== [ 67.644861][ T22] BUG: KFENCE: use-after-free read in kvm_fastop_exception+0xf6a/0x1058 [ 67.644861][ T22] [ 67.644920][ T22] Use-after-free read at 0xffff88823bd22020 (in kfence-#144): [ 67.644936][ T22] kvm_fastop_exception+0xf6a/0x1058 [ 67.644958][ T22] d_lookup+0xd8/0x170 [ 67.644979][ T22] lookup_dcache+0x1e/0x130 [ 67.645002][ T22] __lookup_hash+0x29/0x180 [ 67.645023][ T22] kern_path_locked+0x17e/0x320 [ 67.645046][ T22] handle_remove+0xa2/0x5fe [ 67.645072][ T22] devtmpfsd+0x1b9/0x2a3 [ 67.645094][ T22] kthread+0x3e5/0x4d0 [ 67.645117][ T22] ret_from_fork+0x1f/0x30 [ 67.645140][ T22] [ 67.645144][ T22] kfence-#144: 0xffff88823bd22000-0xffff88823bd22fff, size=4096, cache=names_cache [ 67.645144][ T22] [ 67.645164][ T22] allocated by task 22 on cpu 1 at 67.644633s: [ 67.645196][ T22] getname_kernel+0x4e/0x370 [ 67.645217][ T22] kern_path_locked+0x71/0x320 [ 67.645239][ T22] handle_remove+0xa2/0x5fe [ 67.645262][ T22] devtmpfsd+0x1b9/0x2a3 [ 67.645284][ T22] kthread+0x3e5/0x4d0 [ 67.645304][ T22] ret_from_fork+0x1f/0x30 [ 67.645324][ T22] [ 67.645327][ T22] freed by task 22 on cpu 1 at 67.644659s: [ 67.645358][ T22] putname.part.0+0xe1/0x120 [ 67.645378][ T22] kern_path_locked+0xc2/0x320 [ 67.645400][ T22] handle_remove+0xa2/0x5fe [ 67.645422][ T22] devtmpfsd+0x1b9/0x2a3 [ 67.645441][ T22] kthread+0x3e5/0x4d0 [ 67.645462][ T22] ret_from_fork+0x1f/0x30 [ 67.645481][ T22] [ 67.645486][ T22] CPU: 1 PID: 22 Comm: kdevtmpfs Not tainted 5.14.0-syzkaller #0 [ 67.645509][ T22] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 67.645522][ T22] RIP: 0010:kvm_fastop_exception+0xf6a/0x1058 [ 67.645548][ T22] Code: d3 ed e9 bf d9 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 15 e7 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 05 f1 6e f8 bd [ 67.645571][ T22] RSP: 0018:ffffc90000dcfae8 EFLAGS: 00010282 [ 67.645591][ T22] RAX: 0000000032736376 RBX: ffff88806c531648 RCX: ffff88823bd22020 [ 67.645608][ T22] RDX: ffffed100d8a62d0 RSI: 0000000000000004 RDI: 0000000000000007 [ 67.645623][ T22] RBP: 0000000000000004 R08: 0000000000000000 R09: ffff88806c531678 [ 67.645638][ T22] R10: ffffed100d8a62cf R11: 0000000000000000 R12: ffff88823bd22020 [ 67.645654][ T22] R13: ffff88823bd22020 R14: ffff88806c531678 R15: dffffc0000000000 [ 67.645671][ T22] FS: 0000000000000000(0000) GS:ffff8880b9d00000(0000) knlGS:0000000000000000 [ 67.645695][ T22] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 [ 67.645712][ T22] CR2: ffff88823bd22020 CR3: 000000006f4f2000 CR4: 00000000001506e0 [ 67.645729][ T22] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 [ 67.645742][ T22] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 [ 67.645756][ T22] Call Trace: [ 67.645767][ T22] d_lookup+0xd8/0x170 [ 67.645791][ T22] lookup_dcache+0x1e/0x130 [ 67.645817][ T22] __lookup_hash+0x29/0x180 [ 67.645839][ T22] kern_path_locked+0x17e/0x320 [ 67.645862][ T22] ? filename_lookup+0x80/0x80 [ 67.645895][ T22] handle_remove+0xa2/0x5fe [ 67.645918][ T22] ? cacheinfo_cpu_online.cold+0x3e/0x3e [ 67.645944][ T22] ? lockdep_hardirqs_on_prepare+0x400/0x400 [ 67.645967][ T22] ? finish_task_switch.isra.0+0x232/0xa50 [ 67.645994][ T22] ? find_held_lock+0x2d/0x110 [ 67.646019][ T22] ? devtmpfsd+0xaa/0x2a3 [ 67.646044][ T22] ? lock_downgrade+0x6e0/0x6e0 [ 67.646068][ T22] ? do_raw_spin_lock+0x120/0x2b0 [ 67.646094][ T22] ? rwlock_bug.part.0+0x90/0x90 [ 67.646123][ T22] devtmpfsd+0x1b9/0x2a3 [ 67.646149][ T22] ? dmar_validate_one_drhd+0x24d/0x24d [ 67.646178][ T22] kthread+0x3e5/0x4d0 [ 67.646203][ T22] ? set_kthread_struct+0x130/0x130 [ 67.646232][ T22] ret_from_fork+0x1f/0x30 [ 67.646264][ T22] ================================================================== [ 67.646274][ T22] Kernel panic - not syncing: panic_on_warn set ... [ 67.646576][ T22] CPU: 1 PID: 22 Comm: kdevtmpfs Not tainted 5.14.0-syzkaller #0 [ 67.646599][ T22] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 67.646613][ T22] Call Trace: [ 67.646621][ T22] dump_stack_lvl+0xcd/0x134 [ 67.646651][ T22] panic+0x2b0/0x6dd [ 67.646676][ T22] ? __warn_printk+0xf3/0xf3 [ 67.646712][ T22] ? kfence_report_error.cold+0x2f3/0xa56 [ 67.646748][ T22] kfence_report_error.cold+0x304/0xa56 [ 67.646778][ T22] ? kvm_fastop_exception+0xf6a/0x1058 [ 67.646808][ T22] ? kfence_print_object+0x2e0/0x2e0 [ 67.646838][ T22] ? add_lock_to_list.constprop.0+0x185/0x370 [ 67.646864][ T22] ? kvm_fastop_exception+0xf6a/0x1058 [ 67.646895][ T22] ? d_lookup+0xd8/0x170 [ 67.646920][ T22] ? lookup_dcache+0x1e/0x130 [ 67.646945][ T22] ? __lookup_hash+0x29/0x180 [ 67.646970][ T22] ? kern_path_locked+0x17e/0x320 [ 67.646996][ T22] ? handle_remove+0xa2/0x5fe [ 67.647024][ T22] ? devtmpfsd+0x1b9/0x2a3 [ 67.647050][ T22] ? kthread+0x3e5/0x4d0 [ 67.647076][ T22] ? ret_from_fork+0x1f/0x30 [ 67.647155][ T22] ? mark_lock+0xef/0x17b0 [ 67.647196][ T22] kfence_handle_page_fault+0x203/0x630 [ 67.647233][ T22] page_fault_oops+0x1c5/0x6b0 [ 67.647261][ T22] ? __sanitizer_cov_trace_const_cmp2+0x22/0x80 [ 67.647291][ T22] ? is_prefetch.constprop.0+0xb7/0x530 [ 67.647319][ T22] ? dump_pagetable+0xc0/0xc0 [ 67.647345][ T22] ? pgtable_bad+0x90/0x90 [ 67.647374][ T22] ? search_bpf_extables+0x1d1/0x2f0 [ 67.647401][ T22] ? kvm_fastop_exception+0xf6a/0x1058 [ 67.647435][ T22] kernelmode_fixup_or_oops+0x219/0x280 [ 67.647466][ T22] __bad_area_nosemaphore+0x36d/0x400 [ 67.647493][ T22] ? spurious_kernel_fault+0x38d/0x5b0 [ 67.647525][ T22] do_kern_addr_fault+0x5b/0x70 [ 67.647554][ T22] exc_page_fault+0x155/0x180 [ 67.647581][ T22] asm_exc_page_fault+0x1e/0x30 [ 67.647608][ T22] RIP: 0010:kvm_fastop_exception+0xf6a/0x1058 [ 67.647634][ T22] Code: d3 ed e9 bf d9 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 15 e7 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 05 f1 6e f8 bd [ 67.647657][ T22] RSP: 0018:ffffc90000dcfae8 EFLAGS: 00010282 [ 67.647680][ T22] RAX: 0000000032736376 RBX: ffff88806c531648 RCX: ffff88823bd22020 [ 67.647699][ T22] RDX: ffffed100d8a62d0 RSI: 0000000000000004 RDI: 0000000000000007 [ 67.647715][ T22] RBP: 0000000000000004 R08: 0000000000000000 R09: ffff88806c531678 [ 67.647732][ T22] R10: ffffed100d8a62cf R11: 0000000000000000 R12: ffff88823bd22020 [ 67.647748][ T22] R13: ffff88823bd22020 R14: ffff88806c531678 R15: dffffc0000000000 [ 67.647786][ T22] ? __d_lookup+0x372/0x720 [ 67.647827][ T22] d_lookup+0xd8/0x170 [ 67.647857][ T22] lookup_dcache+0x1e/0x130 [ 67.647893][ T22] __lookup_hash+0x29/0x180 [ 67.647925][ T22] kern_path_locked+0x17e/0x320 [ 67.647955][ T22] ? filename_lookup+0x80/0x80 [ 67.648001][ T22] handle_remove+0xa2/0x5fe [ 67.648035][ T22] ? cacheinfo_cpu_online.cold+0x3e/0x3e [ 67.648073][ T22] ? lockdep_hardirqs_on_prepare+0x400/0x400 [ 67.648103][ T22] ? finish_task_switch.isra.0+0x232/0xa50 [ 67.648143][ T22] ? find_held_lock+0x2d/0x110 [ 67.648174][ T22] ? devtmpfsd+0xaa/0x2a3 [ 67.648201][ T22] ? lock_downgrade+0x6e0/0x6e0 [ 67.648227][ T22] ? do_raw_spin_lock+0x120/0x2b0 [ 67.648263][ T22] ? rwlock_bug.part.0+0x90/0x90 [ 67.648304][ T22] devtmpfsd+0x1b9/0x2a3 [ 67.648334][ T22] ? dmar_validate_one_drhd+0x24d/0x24d [ 67.648367][ T22] kthread+0x3e5/0x4d0 [ 67.648394][ T22] ? set_kthread_struct+0x130/0x130 [ 67.648427][ T22] ret_from_fork+0x1f/0x30 [ 67.648646][ T22] Kernel Offset: disabled