[ 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. [ 68.576234][ T22] ================================================================== [ 68.576246][ T22] BUG: KFENCE: use-after-free read in kvm_fastop_exception+0xf6d/0x105b [ 68.576246][ T22] [ 68.576290][ T22] Use-after-free read at 0xffff88823bdaa020 (in kfence-#212): [ 68.576303][ T22] kvm_fastop_exception+0xf6d/0x105b [ 68.576322][ T22] d_lookup+0xd8/0x170 [ 68.576342][ T22] lookup_dcache+0x1e/0x130 [ 68.576362][ T22] __lookup_hash+0x29/0x180 [ 68.576381][ T22] kern_path_locked+0x17e/0x320 [ 68.576402][ T22] handle_remove+0xa2/0x5fe [ 68.576424][ T22] devtmpfsd+0x1b9/0x2a3 [ 68.576443][ T22] kthread+0x3e5/0x4d0 [ 68.576463][ T22] ret_from_fork+0x1f/0x30 [ 68.576483][ T22] [ 68.576487][ T22] kfence-#212 [0xffff88823bdaa000-0xffff88823bdaafff, size=4096, cache=names_cache] allocated by task 22: [ 68.576523][ T22] getname_kernel+0x4e/0x370 [ 68.576543][ T22] kern_path_locked+0x71/0x320 [ 68.576564][ T22] handle_remove+0xa2/0x5fe [ 68.576583][ T22] devtmpfsd+0x1b9/0x2a3 [ 68.576600][ T22] kthread+0x3e5/0x4d0 [ 68.576618][ T22] ret_from_fork+0x1f/0x30 [ 68.576636][ T22] [ 68.576636][ T22] freed by task 22: [ 68.576660][ T22] putname.part.0+0xe1/0x120 [ 68.576678][ T22] kern_path_locked+0xc2/0x320 [ 68.576698][ T22] handle_remove+0xa2/0x5fe [ 68.576718][ T22] devtmpfsd+0x1b9/0x2a3 [ 68.576735][ T22] kthread+0x3e5/0x4d0 [ 68.576753][ T22] ret_from_fork+0x1f/0x30 [ 68.576771][ T22] [ 68.576776][ T22] CPU: 0 PID: 22 Comm: kdevtmpfs Not tainted 5.14.0-syzkaller #0 [ 68.576797][ T22] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 68.576809][ T22] RIP: 0010:kvm_fastop_exception+0xf6d/0x105b [ 68.576831][ 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 [ 68.576851][ T22] RSP: 0018:ffffc90000dcfae8 EFLAGS: 00010282 [ 68.576869][ T22] RAX: 0000003561736376 RBX: ffff8880727bed78 RCX: ffff88823bdaa020 [ 68.576883][ T22] RDX: ffffed100e4f7db6 RSI: 0000000000000005 RDI: 0000000000000007 [ 68.576896][ T22] RBP: 0000000000000005 R08: 0000000000000000 R09: ffff8880727beda8 [ 68.576909][ T22] R10: ffffed100e4f7db5 R11: 0000000000000000 R12: ffff88823bdaa020 [ 68.576923][ T22] R13: ffff88823bdaa020 R14: ffff8880727beda8 R15: dffffc0000000000 [ 68.576937][ T22] FS: 0000000000000000(0000) GS:ffff8880b9c00000(0000) knlGS:0000000000000000 [ 68.576958][ T22] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 [ 68.576974][ T22] CR2: ffff88823bdaa020 CR3: 00000000723d6000 CR4: 00000000001506f0 [ 68.576988][ T22] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 [ 68.577000][ T22] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 [ 68.577013][ T22] Call Trace: [ 68.577023][ T22] d_lookup+0xd8/0x170 [ 68.577045][ T22] lookup_dcache+0x1e/0x130 [ 68.577067][ T22] __lookup_hash+0x29/0x180 [ 68.577089][ T22] kern_path_locked+0x17e/0x320 [ 68.577118][ T22] ? filename_lookup+0x80/0x80 [ 68.577145][ T22] handle_remove+0xa2/0x5fe [ 68.577169][ T22] ? cacheinfo_cpu_online.cold+0x3e/0x3e [ 68.577194][ T22] ? lockdep_hardirqs_on_prepare+0x400/0x400 [ 68.577217][ T22] ? finish_task_switch.isra.0+0x232/0xa50 [ 68.577243][ T22] ? find_held_lock+0x2d/0x110 [ 68.577263][ T22] ? devtmpfsd+0xaa/0x2a3 [ 68.577283][ T22] ? lock_downgrade+0x6e0/0x6e0 [ 68.577303][ T22] ? do_raw_spin_lock+0x120/0x2b0 [ 68.577324][ T22] ? rwlock_bug.part.0+0x90/0x90 [ 68.577349][ T22] devtmpfsd+0x1b9/0x2a3 [ 68.577369][ T22] ? dmar_validate_one_drhd+0x24d/0x24d [ 68.577392][ T22] kthread+0x3e5/0x4d0 [ 68.577413][ T22] ? set_kthread_struct+0x130/0x130 [ 68.577436][ T22] ret_from_fork+0x1f/0x30 [ 68.577462][ T22] ================================================================== [ 68.577471][ T22] Kernel panic - not syncing: panic_on_warn set ... [ 68.577671][ T22] CPU: 0 PID: 22 Comm: kdevtmpfs Not tainted 5.14.0-syzkaller #0 [ 68.577693][ T22] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 68.577705][ T22] Call Trace: [ 68.577712][ T22] dump_stack_lvl+0xcd/0x134 [ 68.577735][ T22] panic+0x2b0/0x6dd [ 68.577755][ T22] ? __warn_printk+0xf3/0xf3 [ 68.577785][ T22] ? kfence_report_error.cold+0x2f3/0xa56 [ 68.577820][ T22] kfence_report_error.cold+0x304/0xa56 [ 68.577850][ T22] ? kvm_fastop_exception+0xf6d/0x105b [ 68.577876][ T22] ? kfence_print_object+0x350/0x350 [ 68.577902][ T22] ? add_lock_to_list.constprop.0+0x185/0x370 [ 68.577924][ T22] ? kvm_fastop_exception+0xf6d/0x105b [ 68.577950][ T22] ? d_lookup+0xd8/0x170 [ 68.577971][ T22] ? lookup_dcache+0x1e/0x130 [ 68.577992][ T22] ? __lookup_hash+0x29/0x180 [ 68.578014][ T22] ? kern_path_locked+0x17e/0x320 [ 68.578038][ T22] ? handle_remove+0xa2/0x5fe [ 68.578060][ T22] ? devtmpfsd+0x1b9/0x2a3 [ 68.578081][ T22] ? kthread+0x3e5/0x4d0 [ 68.578102][ T22] ? ret_from_fork+0x1f/0x30 [ 68.578171][ T22] ? mark_lock+0xef/0x17b0 [ 68.578204][ T22] kfence_handle_page_fault+0x203/0x630 [ 68.578235][ T22] page_fault_oops+0x1c5/0x6b0 [ 68.578258][ T22] ? __sanitizer_cov_trace_const_cmp2+0x22/0x80 [ 68.578283][ T22] ? is_prefetch.constprop.0+0xb7/0x530 [ 68.578306][ T22] ? dump_pagetable+0xc0/0xc0 [ 68.578328][ T22] ? pgtable_bad+0x90/0x90 [ 68.578352][ T22] ? search_bpf_extables+0x1d1/0x2f0 [ 68.578374][ T22] ? kvm_fastop_exception+0xf6d/0x105b [ 68.578402][ T22] kernelmode_fixup_or_oops+0x219/0x280 [ 68.578428][ T22] __bad_area_nosemaphore+0x36d/0x400 [ 68.578452][ T22] ? spurious_kernel_fault+0x38d/0x5b0 [ 68.578479][ T22] do_kern_addr_fault+0x5b/0x70 [ 68.578503][ T22] exc_page_fault+0x155/0x180 [ 68.578527][ T22] asm_exc_page_fault+0x1e/0x30 [ 68.578550][ T22] RIP: 0010:kvm_fastop_exception+0xf6d/0x105b [ 68.578572][ 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 [ 68.578592][ T22] RSP: 0018:ffffc90000dcfae8 EFLAGS: 00010282 [ 68.578611][ T22] RAX: 0000003561736376 RBX: ffff8880727bed78 RCX: ffff88823bdaa020 [ 68.578626][ T22] RDX: ffffed100e4f7db6 RSI: 0000000000000005 RDI: 0000000000000007 [ 68.578640][ T22] RBP: 0000000000000005 R08: 0000000000000000 R09: ffff8880727beda8 [ 68.578654][ T22] R10: ffffed100e4f7db5 R11: 0000000000000000 R12: ffff88823bdaa020 [ 68.578669][ T22] R13: ffff88823bdaa020 R14: ffff8880727beda8 R15: dffffc0000000000 [ 68.578700][ T22] ? __d_lookup+0x372/0x720 [ 68.578734][ T22] d_lookup+0xd8/0x170 [ 68.578759][ T22] lookup_dcache+0x1e/0x130 [ 68.578783][ T22] __lookup_hash+0x29/0x180 [ 68.578809][ T22] kern_path_locked+0x17e/0x320 [ 68.578834][ T22] ? filename_lookup+0x80/0x80 [ 68.578872][ T22] handle_remove+0xa2/0x5fe [ 68.578899][ T22] ? cacheinfo_cpu_online.cold+0x3e/0x3e [ 68.578929][ T22] ? lockdep_hardirqs_on_prepare+0x400/0x400 [ 68.578954][ T22] ? finish_task_switch.isra.0+0x232/0xa50 [ 68.578987][ T22] ? find_held_lock+0x2d/0x110 [ 68.579013][ T22] ? devtmpfsd+0xaa/0x2a3 [ 68.579034][ T22] ? lock_downgrade+0x6e0/0x6e0 [ 68.579057][ T22] ? do_raw_spin_lock+0x120/0x2b0 [ 68.579081][ T22] ? rwlock_bug.part.0+0x90/0x90 [ 68.579118][ T22] devtmpfsd+0x1b9/0x2a3 [ 68.579143][ T22] ? dmar_validate_one_drhd+0x24d/0x24d [ 68.579170][ T22] kthread+0x3e5/0x4d0 [ 68.579192][ T22] ? set_kthread_struct+0x130/0x130 [ 68.579219][ T22] ret_from_fork+0x1f/0x30 [ 68.579607][ T22] Kernel Offset: disabled