[ 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. [ 68.165405][ T22] ================================================================== [ 68.165418][ T22] BUG: KFENCE: use-after-free read in kvm_fastop_exception+0xf6d/0x105b [ 68.165418][ T22] [ 68.165466][ T22] Use-after-free read at 0xffff88823bd5e020 (in kfence-#174): [ 68.165483][ T22] kvm_fastop_exception+0xf6d/0x105b [ 68.165505][ T22] d_lookup+0xd8/0x170 [ 68.165529][ T22] lookup_dcache+0x1e/0x130 [ 68.165552][ T22] __lookup_hash+0x29/0x180 [ 68.165582][ T22] kern_path_locked+0x17e/0x320 [ 68.165608][ T22] handle_remove+0xa2/0x5fe [ 68.165634][ T22] devtmpfsd+0x1b9/0x2a3 [ 68.165655][ T22] kthread+0x3e5/0x4d0 [ 68.165679][ T22] ret_from_fork+0x1f/0x30 [ 68.165703][ T22] [ 68.165708][ T22] kfence-#174 [0xffff88823bd5e000-0xffff88823bd5efff, size=4096, cache=names_cache] allocated by task 22: [ 68.165750][ T22] getname_kernel+0x4e/0x370 [ 68.165775][ T22] kern_path_locked+0x71/0x320 [ 68.165799][ T22] handle_remove+0xa2/0x5fe [ 68.165822][ T22] devtmpfsd+0x1b9/0x2a3 [ 68.165842][ T22] kthread+0x3e5/0x4d0 [ 68.165864][ T22] ret_from_fork+0x1f/0x30 [ 68.165886][ T22] [ 68.165886][ T22] freed by task 22: [ 68.165913][ T22] putname.part.0+0xe1/0x120 [ 68.165936][ T22] kern_path_locked+0xc2/0x320 [ 68.165960][ T22] handle_remove+0xa2/0x5fe [ 68.165984][ T22] devtmpfsd+0x1b9/0x2a3 [ 68.166004][ T22] kthread+0x3e5/0x4d0 [ 68.166025][ T22] ret_from_fork+0x1f/0x30 [ 68.166046][ T22] [ 68.166051][ T22] CPU: 1 PID: 22 Comm: kdevtmpfs Not tainted 5.14.0-syzkaller #0 [ 68.166073][ T22] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 68.166086][ T22] RIP: 0010:kvm_fastop_exception+0xf6d/0x105b [ 68.166111][ 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 [ 68.166131][ T22] RSP: 0018:ffffc90000dcfae8 EFLAGS: 00010282 [ 68.166151][ T22] RAX: 0000003375736376 RBX: ffff888072f2d068 RCX: ffff88823bd5e020 [ 68.166168][ T22] RDX: ffffed100e5e5a14 RSI: 0000000000000005 RDI: 0000000000000007 [ 68.166182][ T22] RBP: 0000000000000005 R08: 0000000000000000 R09: ffff888072f2d098 [ 68.166196][ T22] R10: ffffed100e5e5a13 R11: 0000000000000000 R12: ffff88823bd5e020 [ 68.166211][ T22] R13: ffff88823bd5e020 R14: ffff888072f2d098 R15: dffffc0000000000 [ 68.166228][ T22] FS: 0000000000000000(0000) GS:ffff8880b9d00000(0000) knlGS:0000000000000000 [ 68.166251][ T22] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 [ 68.166268][ T22] CR2: ffff88823bd5e020 CR3: 000000000b68e000 CR4: 00000000001506e0 [ 68.166284][ T22] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 [ 68.166298][ T22] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 [ 68.166313][ T22] Call Trace: [ 68.166326][ T22] d_lookup+0xd8/0x170 [ 68.166353][ T22] lookup_dcache+0x1e/0x130 [ 68.166379][ T22] __lookup_hash+0x29/0x180 [ 68.166405][ T22] kern_path_locked+0x17e/0x320 [ 68.166431][ T22] ? filename_lookup+0x80/0x80 [ 68.166462][ T22] handle_remove+0xa2/0x5fe [ 68.166489][ T22] ? cacheinfo_cpu_online.cold+0x3e/0x3e [ 68.166518][ T22] ? lockdep_hardirqs_on_prepare+0x400/0x400 [ 68.166544][ T22] ? finish_task_switch.isra.0+0x232/0xa50 [ 68.166581][ T22] ? find_held_lock+0x2d/0x110 [ 68.166605][ T22] ? devtmpfsd+0xaa/0x2a3 [ 68.166627][ T22] ? lock_downgrade+0x6e0/0x6e0 [ 68.166649][ T22] ? do_raw_spin_lock+0x120/0x2b0 [ 68.166674][ T22] ? rwlock_bug.part.0+0x90/0x90 [ 68.166701][ T22] devtmpfsd+0x1b9/0x2a3 [ 68.166725][ T22] ? dmar_validate_one_drhd+0x24d/0x24d [ 68.166750][ T22] kthread+0x3e5/0x4d0 [ 68.166774][ T22] ? set_kthread_struct+0x130/0x130 [ 68.166800][ T22] ret_from_fork+0x1f/0x30 [ 68.166831][ T22] ================================================================== [ 68.166841][ T22] Kernel panic - not syncing: panic_on_warn set ... [ 68.167130][ T22] CPU: 1 PID: 22 Comm: kdevtmpfs Not tainted 5.14.0-syzkaller #0 [ 68.167154][ T22] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 68.167168][ T22] Call Trace: [ 68.167177][ T22] dump_stack_lvl+0xcd/0x134 [ 68.167206][ T22] panic+0x2b0/0x6dd [ 68.167229][ T22] ? __warn_printk+0xf3/0xf3 [ 68.167263][ T22] ? kfence_report_error.cold+0x2f3/0xa56 [ 68.167302][ T22] kfence_report_error.cold+0x304/0xa56 [ 68.167339][ T22] ? kvm_fastop_exception+0xf6d/0x105b [ 68.167369][ T22] ? kfence_print_object+0x350/0x350 [ 68.167402][ T22] ? add_lock_to_list.constprop.0+0x185/0x370 [ 68.167428][ T22] ? kvm_fastop_exception+0xf6d/0x105b [ 68.167453][ T22] ? d_lookup+0xd8/0x170 [ 68.167478][ T22] ? lookup_dcache+0x1e/0x130 [ 68.167504][ T22] ? __lookup_hash+0x29/0x180 [ 68.167530][ T22] ? kern_path_locked+0x17e/0x320 [ 68.167559][ T22] ? handle_remove+0xa2/0x5fe [ 68.167592][ T22] ? devtmpfsd+0x1b9/0x2a3 [ 68.167615][ T22] ? kthread+0x3e5/0x4d0 [ 68.167640][ T22] ? ret_from_fork+0x1f/0x30 [ 68.167717][ T22] ? mark_lock+0xef/0x17b0 [ 68.167758][ T22] kfence_handle_page_fault+0x203/0x630 [ 68.167796][ T22] page_fault_oops+0x1c5/0x6b0 [ 68.167823][ T22] ? __sanitizer_cov_trace_const_cmp2+0x22/0x80 [ 68.167854][ T22] ? is_prefetch.constprop.0+0xb7/0x530 [ 68.167880][ T22] ? dump_pagetable+0xc0/0xc0 [ 68.167905][ T22] ? pgtable_bad+0x90/0x90 [ 68.167935][ T22] ? search_bpf_extables+0x1d1/0x2f0 [ 68.167960][ T22] ? kvm_fastop_exception+0xf6d/0x105b [ 68.167993][ T22] kernelmode_fixup_or_oops+0x219/0x280 [ 68.168024][ T22] __bad_area_nosemaphore+0x36d/0x400 [ 68.168052][ T22] ? spurious_kernel_fault+0x38d/0x5b0 [ 68.168084][ T22] do_kern_addr_fault+0x5b/0x70 [ 68.168112][ T22] exc_page_fault+0x155/0x180 [ 68.168139][ T22] asm_exc_page_fault+0x1e/0x30 [ 68.168166][ T22] RIP: 0010:kvm_fastop_exception+0xf6d/0x105b [ 68.168192][ 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 [ 68.168216][ T22] RSP: 0018:ffffc90000dcfae8 EFLAGS: 00010282 [ 68.168237][ T22] RAX: 0000003375736376 RBX: ffff888072f2d068 RCX: ffff88823bd5e020 [ 68.168253][ T22] RDX: ffffed100e5e5a14 RSI: 0000000000000005 RDI: 0000000000000007 [ 68.168267][ T22] RBP: 0000000000000005 R08: 0000000000000000 R09: ffff888072f2d098 [ 68.168281][ T22] R10: ffffed100e5e5a13 R11: 0000000000000000 R12: ffff88823bd5e020 [ 68.168295][ T22] R13: ffff88823bd5e020 R14: ffff888072f2d098 R15: dffffc0000000000 [ 68.168326][ T22] ? __d_lookup+0x372/0x720 [ 68.168361][ T22] d_lookup+0xd8/0x170 [ 68.168388][ T22] lookup_dcache+0x1e/0x130 [ 68.168412][ T22] __lookup_hash+0x29/0x180 [ 68.168440][ T22] kern_path_locked+0x17e/0x320 [ 68.168470][ T22] ? filename_lookup+0x80/0x80 [ 68.168513][ T22] handle_remove+0xa2/0x5fe [ 68.168547][ T22] ? cacheinfo_cpu_online.cold+0x3e/0x3e [ 68.168589][ T22] ? lockdep_hardirqs_on_prepare+0x400/0x400 [ 68.168618][ T22] ? finish_task_switch.isra.0+0x232/0xa50 [ 68.168657][ T22] ? find_held_lock+0x2d/0x110 [ 68.168688][ T22] ? devtmpfsd+0xaa/0x2a3 [ 68.168714][ T22] ? lock_downgrade+0x6e0/0x6e0 [ 68.168739][ T22] ? do_raw_spin_lock+0x120/0x2b0 [ 68.168766][ T22] ? rwlock_bug.part.0+0x90/0x90 [ 68.168805][ T22] devtmpfsd+0x1b9/0x2a3 [ 68.168835][ T22] ? dmar_validate_one_drhd+0x24d/0x24d [ 68.168867][ T22] kthread+0x3e5/0x4d0 [ 68.168893][ T22] ? set_kthread_struct+0x130/0x130 [ 68.168927][ T22] ret_from_fork+0x1f/0x30 [ 68.169365][ T22] Kernel Offset: disabled