Starting Permit User Sessions... [ OK ] Started Daily apt download activities. [ OK ] Started Daily apt upgrade and clean activities. [ OK ] Reached target Timers. Starting System Logging Service... [ OK ] Started Permit User Sessions. [ OK ] Started System Logging Service. [ OK ] Started OpenBSD Secure Shell server. [ OK ] Found device /dev/ttyS0. [ OK ] Started getty on tty2-tty6 if dbus and logind are not available. [ OK ] Listening on Load/Save RF Kill Switch Status /dev/rfkill Watch. [ OK ] Started Getty on tty6. [ OK ] Started Getty on tty5. [ 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... Starting Load/Save RF Kill Switch Status... [ OK ] Started Update UTMP about System Runlevel Changes. [ OK ] Started Load/Save RF Kill Switch Status. [ 75.473502][ T22] ================================================================== [ 75.473513][ T22] BUG: KFENCE: use-after-free read in kvm_fastop_exception+0xf6a/0x1058 [ 75.473513][ T22] [ 75.473561][ T22] Use-after-free read at 0xffff88823bdd6020 (in kfence-#234): [ 75.473574][ T22] kvm_fastop_exception+0xf6a/0x1058 [ 75.473594][ T22] d_lookup+0xd8/0x170 [ 75.473613][ T22] lookup_dcache+0x1e/0x130 [ 75.473630][ T22] __lookup_hash+0x29/0x180 [ 75.473646][ T22] kern_path_locked+0x17e/0x320 [ 75.473665][ T22] handle_remove+0xa2/0x5fe [ 75.473682][ T22] devtmpfsd+0x1b9/0x2a3 [ 75.473703][ T22] kthread+0x3e5/0x4d0 [ 75.473722][ T22] ret_from_fork+0x1f/0x30 [ 75.473742][ T22] [ 75.473746][ T22] kfence-#234: 0xffff88823bdd6000-0xffff88823bdd6fff, size=4096, cache=names_cache [ 75.473746][ T22] [ 75.473764][ T22] allocated by task 22 on cpu 1 at 75.473390s: [ 75.473791][ T22] getname_kernel+0x4e/0x370 [ 75.473809][ T22] kern_path_locked+0x71/0x320 [ 75.473827][ T22] handle_remove+0xa2/0x5fe [ 75.473842][ T22] devtmpfsd+0x1b9/0x2a3 [ 75.473861][ T22] kthread+0x3e5/0x4d0 [ 75.473878][ T22] ret_from_fork+0x1f/0x30 [ 75.473896][ T22] [ 75.473899][ T22] freed by task 22 on cpu 1 at 75.473415s: [ 75.473927][ T22] putname.part.0+0xe1/0x120 [ 75.473943][ T22] kern_path_locked+0xc2/0x320 [ 75.473960][ T22] handle_remove+0xa2/0x5fe [ 75.473975][ T22] devtmpfsd+0x1b9/0x2a3 [ 75.473994][ T22] kthread+0x3e5/0x4d0 [ 75.474011][ T22] ret_from_fork+0x1f/0x30 [ 75.474029][ T22] [ 75.474033][ T22] CPU: 1 PID: 22 Comm: kdevtmpfs Not tainted 5.14.0-syzkaller #0 [ 75.474053][ T22] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 75.474065][ T22] RIP: 0010:kvm_fastop_exception+0xf6a/0x1058 [ 75.474089][ T22] Code: d3 ed e9 67 8d 6d f8 49 8d 0e 48 83 e1 f8 4c 8b 21 41 8d 0e 83 e1 07 c1 e1 03 49 d3 ec e9 bd 9a 6d 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 ad a4 6d f8 bd [ 75.474112][ T22] RSP: 0018:ffffc90000fe7ae8 EFLAGS: 00010282 [ 75.474129][ T22] RAX: 0000000035736376 RBX: ffff88806ddc0ac8 RCX: ffff88823bdd6020 [ 75.474143][ T22] RDX: ffffed100dbb8160 RSI: 0000000000000004 RDI: 0000000000000007 [ 75.474156][ T22] RBP: 0000000000000004 R08: 0000000000000000 R09: ffff88806ddc0af8 [ 75.474168][ T22] R10: ffffed100dbb815f R11: 0000000000000000 R12: ffff88823bdd6020 [ 75.474181][ T22] R13: ffff88823bdd6020 R14: ffff88806ddc0af8 R15: dffffc0000000000 [ 75.474195][ T22] FS: 0000000000000000(0000) GS:ffff8880b9d00000(0000) knlGS:0000000000000000 [ 75.474214][ T22] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 [ 75.474228][ T22] CR2: ffff88823bdd6020 CR3: 00000000203f0000 CR4: 00000000001506e0 [ 75.474241][ T22] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 [ 75.474253][ T22] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 [ 75.474265][ T22] Call Trace: [ 75.474271][ T22] d_lookup+0xd8/0x170 [ 75.474290][ T22] lookup_dcache+0x1e/0x130 [ 75.474308][ T22] __lookup_hash+0x29/0x180 [ 75.474327][ T22] kern_path_locked+0x17e/0x320 [ 75.474347][ T22] ? filename_lookup+0x80/0x80 [ 75.474368][ T22] handle_remove+0xa2/0x5fe [ 75.474385][ T22] ? cacheinfo_cpu_online.cold+0x3e/0x3e [ 75.474405][ T22] ? lockdep_hardirqs_on_prepare+0x400/0x400 [ 75.474427][ T22] ? finish_task_switch.isra.0+0x232/0xa50 [ 75.474450][ T22] ? find_held_lock+0x2d/0x110 [ 75.474468][ T22] ? devtmpfsd+0xaa/0x2a3 [ 75.474488][ T22] ? lock_downgrade+0x6e0/0x6e0 [ 75.474507][ T22] ? do_raw_spin_lock+0x120/0x2b0 [ 75.474527][ T22] ? rwlock_bug.part.0+0x90/0x90 [ 75.474548][ T22] devtmpfsd+0x1b9/0x2a3 [ 75.474569][ T22] ? dmar_validate_one_drhd+0x24d/0x24d [ 75.474592][ T22] kthread+0x3e5/0x4d0 [ 75.474612][ T22] ? set_kthread_struct+0x130/0x130 [ 75.474634][ T22] ret_from_fork+0x1f/0x30 [ 75.474655][ T22] ================================================================== [ 75.474663][ T22] Kernel panic - not syncing: panic_on_warn set ... [ 75.474829][ T22] CPU: 1 PID: 22 Comm: kdevtmpfs Not tainted 5.14.0-syzkaller #0 [ 75.474849][ T22] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 75.474861][ T22] Call Trace: [ 75.474867][ T22] dump_stack_lvl+0xcd/0x134 [ 75.474890][ T22] panic+0x2b0/0x6dd [ 75.474910][ T22] ? __warn_printk+0xf3/0xf3 [ 75.474930][ T22] ? kfence_report_error.cold+0x2f3/0xa56 [ 75.474952][ T22] kfence_report_error.cold+0x304/0xa56 [ 75.474973][ T22] ? kvm_fastop_exception+0xf6a/0x1058 [ 75.474995][ T22] ? kfence_print_object+0x2e0/0x2e0 [ 75.475015][ T22] ? add_lock_to_list.constprop.0+0x185/0x370 [ 75.475037][ T22] ? kvm_fastop_exception+0xf6a/0x1058 [ 75.475058][ T22] ? d_lookup+0xd8/0x170 [ 75.475077][ T22] ? lookup_dcache+0x1e/0x130 [ 75.475102][ T22] ? __lookup_hash+0x29/0x180 [ 75.475121][ T22] ? kern_path_locked+0x17e/0x320 [ 75.475142][ T22] ? handle_remove+0xa2/0x5fe [ 75.475161][ T22] ? devtmpfsd+0x1b9/0x2a3 [ 75.475183][ T22] ? kthread+0x3e5/0x4d0 [ 75.475204][ T22] ? ret_from_fork+0x1f/0x30 [ 75.475228][ T22] ? mark_lock+0xef/0x17b0 [ 75.475247][ T22] ? mark_lock+0xef/0x17b0 [ 75.475266][ T22] kfence_handle_page_fault+0x203/0x630 [ 75.475288][ T22] ? __sanitizer_cov_trace_cmp8+0x1d/0x70 [ 75.475311][ T22] page_fault_oops+0x1c5/0x6b0 [ 75.475332][ T22] ? __sanitizer_cov_trace_const_cmp2+0x22/0x80 [ 75.475355][ T22] ? is_prefetch.constprop.0+0xb7/0x530 [ 75.475376][ T22] ? dump_pagetable+0xc0/0xc0 [ 75.475395][ T22] ? pgtable_bad+0x90/0x90 [ 75.475414][ T22] ? search_module_extables+0xaf/0x100 [ 75.475439][ T22] ? search_exception_tables+0x33/0x50 [ 75.475461][ T22] kernelmode_fixup_or_oops+0x219/0x280 [ 75.475482][ T22] __bad_area_nosemaphore+0x36d/0x400 [ 75.475504][ T22] ? spurious_kernel_fault+0x38d/0x5b0 [ 75.475526][ T22] do_kern_addr_fault+0x5b/0x70 [ 75.475546][ T22] exc_page_fault+0x155/0x180 [ 75.475568][ T22] asm_exc_page_fault+0x1e/0x30 [ 75.475592][ T22] RIP: 0010:kvm_fastop_exception+0xf6a/0x1058 [ 75.475617][ T22] Code: d3 ed e9 67 8d 6d f8 49 8d 0e 48 83 e1 f8 4c 8b 21 41 8d 0e 83 e1 07 c1 e1 03 49 d3 ec e9 bd 9a 6d 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 ad a4 6d f8 bd [ 75.475636][ T22] RSP: 0018:ffffc90000fe7ae8 EFLAGS: 00010282 [ 75.475654][ T22] RAX: 0000000035736376 RBX: ffff88806ddc0ac8 RCX: ffff88823bdd6020 [ 75.475668][ T22] RDX: ffffed100dbb8160 RSI: 0000000000000004 RDI: 0000000000000007 [ 75.475682][ T22] RBP: 0000000000000004 R08: 0000000000000000 R09: ffff88806ddc0af8 [ 75.475696][ T22] R10: ffffed100dbb815f R11: 0000000000000000 R12: ffff88823bdd6020 [ 75.475710][ T22] R13: ffff88823bdd6020 R14: ffff88806ddc0af8 R15: dffffc0000000000 [ 75.475726][ T22] ? __d_lookup+0x372/0x720 [ 75.475746][ T22] d_lookup+0xd8/0x170 [ 75.475765][ T22] lookup_dcache+0x1e/0x130 [ 75.475784][ T22] __lookup_hash+0x29/0x180 [ 75.475803][ T22] kern_path_locked+0x17e/0x320 [ 75.475825][ T22] ? filename_lookup+0x80/0x80 [ 75.475855][ T22] handle_remove+0xa2/0x5fe [ 75.475873][ T22] ? cacheinfo_cpu_online.cold+0x3e/0x3e [ 75.475894][ T22] ? lockdep_hardirqs_on_prepare+0x400/0x400 [ 75.475916][ T22] ? finish_task_switch.isra.0+0x232/0xa50 [ 75.475939][ T22] ? find_held_lock+0x2d/0x110 [ 75.475958][ T22] ? devtmpfsd+0xaa/0x2a3 [ 75.475979][ T22] ? lock_downgrade+0x6e0/0x6e0 [ 75.475999][ T22] ? do_raw_spin_lock+0x120/0x2b0 [ 75.476021][ T22] ? rwlock_bug.part.0+0x90/0x90 [ 75.476042][ T22] devtmpfsd+0x1b9/0x2a3 [ 75.476064][ T22] ? dmar_validate_one_drhd+0x24d/0x24d [ 75.476089][ T22] kthread+0x3e5/0x4d0 [ 75.476114][ T22] ? set_kthread_struct+0x130/0x130 [ 75.476137][ T22] ret_from_fork+0x1f/0x30 [ 75.476506][ T22] Kernel Offset: disabled