[ 68.807529][ T6382] RSP: 002b:00007fff469eb1b8 EFLAGS: 00000246 ORIG_RAX: 0000000000000002 [ 68.807552][ T6382] RAX: ffffffffffffffda RBX: 00005591c53e9a80 RCX: 00007fc03474d840 [ 68.807569][ T6382] RDX: 00005591c4768fe3 RSI: 00000000000a0800 RDI: 00005591c53eb800 [ 68.807584][ T6382] RBP: 00007fff469eb330 R08: 00005591c4768670 R09: 0000000000000020 [ 68.807600][ T6382] R10: 00005591c4768d0c R11: 0000000000000246 R12: 00007fff469eb280 [ 68.807615][ T6382] R13: 00005591c53d9790 R14: 0000000000000003 R15: 000000000000000e [ 69.647775][ T8113] sshd (8113) used greatest stack depth: 22968 bytes left [ OK ] Started Permit User Sessions. [ OK ] Started OpenBSD Secure Shell server. [ 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 tty1. [ OK ] Started Serial Getty on ttyS0. [ OK ] Started Getty on tty2. [ 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. [ 82.227078][ T22] ================================================================== [ 82.227090][ T22] BUG: KFENCE: use-after-free read in kvm_fastop_exception+0xf6d/0x105b [ 82.227090][ T22] [ 82.227124][ T22] Use-after-free read at 0xffff88823bc0c020 (in kfence-#5): [ 82.227139][ T22] kvm_fastop_exception+0xf6d/0x105b [ 82.227163][ T22] d_lookup+0xd8/0x170 [ 82.227183][ T22] lookup_dcache+0x1e/0x130 [ 82.227201][ T22] __lookup_hash+0x29/0x180 [ 82.227218][ T22] kern_path_locked+0x17e/0x320 [ 82.227238][ T22] handle_remove+0xa2/0x5fe [ 82.227260][ T22] devtmpfsd+0x1b9/0x2a3 [ 82.227287][ T22] kthread+0x3e5/0x4d0 [ 82.227308][ T22] ret_from_fork+0x1f/0x30 [ 82.227330][ T22] [ 82.227334][ T22] kfence-#5 [0xffff88823bc0c000-0xffff88823bc0cfff, size=4096, cache=names_cache] allocated by task 22: [ 82.227421][ T22] getname_kernel+0x4e/0x370 [ 82.227442][ T22] kern_path_locked+0x71/0x320 [ 82.227461][ T22] handle_remove+0xa2/0x5fe [ 82.227481][ T22] devtmpfsd+0x1b9/0x2a3 [ 82.227506][ T22] kthread+0x3e5/0x4d0 [ 82.227528][ T22] ret_from_fork+0x1f/0x30 [ 82.227550][ T22] [ 82.227550][ T22] freed by task 22: [ 82.227581][ T22] putname.part.0+0xe1/0x120 [ 82.227599][ T22] kern_path_locked+0xc2/0x320 [ 82.227621][ T22] handle_remove+0xa2/0x5fe [ 82.227641][ T22] devtmpfsd+0x1b9/0x2a3 [ 82.227667][ T22] kthread+0x3e5/0x4d0 [ 82.227690][ T22] ret_from_fork+0x1f/0x30 [ 82.227713][ T22] [ 82.227718][ T22] CPU: 1 PID: 22 Comm: kdevtmpfs Not tainted 5.14.0-syzkaller #0 [ 82.227743][ T22] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 82.227757][ T22] RIP: 0010:kvm_fastop_exception+0xf6d/0x105b [ 82.227786][ T22] Code: d3 ed e9 14 1b 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 6a 28 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 5a 32 6d f8 bd [ 82.227809][ T22] RSP: 0018:ffffc90000fe7ae8 EFLAGS: 00010282 [ 82.227830][ T22] RAX: 0000000035736376 RBX: ffff88803b141cc0 RCX: ffff88823bc0c020 [ 82.227847][ T22] RDX: ffffed100762839f RSI: 0000000000000004 RDI: 0000000000000007 [ 82.227862][ T22] RBP: 0000000000000004 R08: 0000000000000000 R09: ffff88803b141cf0 [ 82.227875][ T22] R10: ffffed100762839e R11: 0000000000000000 R12: ffff88823bc0c020 [ 82.227891][ T22] R13: ffff88823bc0c020 R14: ffff88803b141cf0 R15: dffffc0000000000 [ 82.227909][ T22] FS: 0000000000000000(0000) GS:ffff8880b9d00000(0000) knlGS:0000000000000000 [ 82.227932][ T22] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 [ 82.227949][ T22] CR2: ffff88823bc0c020 CR3: 0000000029892000 CR4: 00000000001506e0 [ 82.227962][ T22] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 [ 82.227974][ T22] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 [ 82.227990][ T22] Call Trace: [ 82.227997][ T22] d_lookup+0xd8/0x170 [ 82.228019][ T22] lookup_dcache+0x1e/0x130 [ 82.228041][ T22] __lookup_hash+0x29/0x180 [ 82.228062][ T22] kern_path_locked+0x17e/0x320 [ 82.228086][ T22] ? filename_lookup+0x80/0x80 [ 82.228111][ T22] ? rcu_read_lock_sched_held+0xd/0x70 [ 82.228144][ T22] ? rcu_read_lock_sched_held+0xd/0x70 [ 82.228175][ T22] handle_remove+0xa2/0x5fe [ 82.228199][ T22] ? lock_downgrade+0x6e0/0x6e0 [ 82.228223][ T22] ? cacheinfo_cpu_online.cold+0x3e/0x3e [ 82.228250][ T22] ? finish_task_switch.isra.0+0x232/0xa50 [ 82.228275][ T22] ? trace_hardirqs_on+0x5b/0x1c0 [ 82.228303][ T22] ? finish_task_switch.isra.0+0x232/0xa50 [ 82.228328][ T22] ? __switch_to+0x5cc/0x1060 [ 82.228353][ T22] ? rcu_read_lock_sched_held+0xd/0x70 [ 82.228386][ T22] ? lock_acquire+0x442/0x510 [ 82.228407][ T22] ? rcu_read_lock_sched_held+0xd/0x70 [ 82.228437][ T22] ? lock_release+0x522/0x720 [ 82.228460][ T22] ? devtmpfsd+0xaa/0x2a3 [ 82.228487][ T22] ? lock_downgrade+0x6e0/0x6e0 [ 82.228509][ T22] ? do_raw_spin_lock+0x120/0x2b0 [ 82.228533][ T22] ? rwlock_bug.part.0+0x90/0x90 [ 82.228556][ T22] devtmpfsd+0x1b9/0x2a3 [ 82.228584][ T22] ? dmar_validate_one_drhd+0x24d/0x24d [ 82.228614][ T22] kthread+0x3e5/0x4d0 [ 82.228637][ T22] ? set_kthread_struct+0x130/0x130 [ 82.228664][ T22] ret_from_fork+0x1f/0x30 [ 82.228692][ T22] ================================================================== [ 82.228702][ T22] Kernel panic - not syncing: panic_on_warn set ... [ 82.228712][ T22] CPU: 1 PID: 22 Comm: kdevtmpfs Not tainted 5.14.0-syzkaller #0 [ 82.228735][ T22] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 82.228747][ T22] Call Trace: [ 82.228754][ T22] dump_stack_lvl+0xcd/0x134 [ 82.228782][ T22] panic+0x306/0x73d [ 82.228807][ T22] ? __warn_printk+0xf3/0xf3 [ 82.228834][ T22] ? kfence_report_error.cold+0x2f3/0xa56 [ 82.228862][ T22] kfence_report_error.cold+0x304/0xa56 [ 82.228887][ T22] ? kvm_fastop_exception+0xf6d/0x105b [ 82.228914][ T22] ? deref_stack_reg+0xee/0x150 [ 82.228945][ T22] ? kfence_print_object+0x350/0x350 [ 82.228977][ T22] ? kvm_fastop_exception+0xf6d/0x105b [ 82.229004][ T22] ? d_lookup+0xd8/0x170 [ 82.229025][ T22] ? lookup_dcache+0x1e/0x130 [ 82.229046][ T22] ? __lookup_hash+0x29/0x180 [ 82.229067][ T22] ? kern_path_locked+0x17e/0x320 [ 82.229091][ T22] ? handle_remove+0xa2/0x5fe [ 82.229114][ T22] ? devtmpfsd+0x1b9/0x2a3 [ 82.229143][ T22] ? kthread+0x3e5/0x4d0 [ 82.229168][ T22] ? ret_from_fork+0x1f/0x30 [ 82.229202][ T22] ? unwind_next_frame+0x3da/0x1ce0 [ 82.229229][ T22] ? ret_from_fork+0x1f/0x30 [ 82.229254][ T22] kfence_handle_page_fault+0x203/0x630 [ 82.229285][ T22] ? __sanitizer_cov_trace_cmp8+0x1d/0x70 [ 82.229313][ T22] page_fault_oops+0x1c5/0x6b0 [ 82.229336][ T22] ? __sanitizer_cov_trace_const_cmp2+0x22/0x80 [ 82.229367][ T22] ? is_prefetch.constprop.0+0xb7/0x530 [ 82.229391][ T22] ? dump_pagetable+0xc0/0xc0 [ 82.229412][ T22] ? pgtable_bad+0x90/0x90 [ 82.229434][ T22] ? arch_stack_walk+0x5c/0xe0 [ 82.229458][ T22] ? search_module_extables+0xaf/0x100 [ 82.229486][ T22] ? search_exception_tables+0x33/0x50 [ 82.229512][ T22] kernelmode_fixup_or_oops+0x219/0x280 [ 82.229537][ T22] __bad_area_nosemaphore+0x36d/0x400 [ 82.229562][ T22] ? spurious_kernel_fault+0x38d/0x5b0 [ 82.229587][ T22] do_kern_addr_fault+0x5b/0x70 [ 82.229612][ T22] exc_page_fault+0x155/0x180 [ 82.229639][ T22] asm_exc_page_fault+0x1e/0x30 [ 82.229671][ T22] RIP: 0010:kvm_fastop_exception+0xf6d/0x105b [ 82.229700][ T22] Code: d3 ed e9 14 1b 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 6a 28 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 5a 32 6d f8 bd [ 82.229723][ T22] RSP: 0018:ffffc90000fe7ae8 EFLAGS: 00010282 [ 82.229742][ T22] RAX: 0000000035736376 RBX: ffff88803b141cc0 RCX: ffff88823bc0c020 [ 82.229759][ T22] RDX: ffffed100762839f RSI: 0000000000000004 RDI: 0000000000000007 [ 82.229774][ T22] RBP: 0000000000000004 R08: 0000000000000000 R09: ffff88803b141cf0 [ 82.229789][ T22] R10: ffffed100762839e R11: 0000000000000000 R12: ffff88823bc0c020 [ 82.229805][ T22] R13: ffff88823bc0c020 R14: ffff88803b141cf0 R15: dffffc0000000000 [ 82.229824][ T22] ? __d_lookup+0x372/0x720 [ 82.229846][ T22] d_lookup+0xd8/0x170 [ 82.229867][ T22] lookup_dcache+0x1e/0x130 [ 82.229888][ T22] __lookup_hash+0x29/0x180 [ 82.229907][ T22] kern_path_locked+0x17e/0x320 [ 82.229927][ T22] ? filename_lookup+0x80/0x80 [ 82.229947][ T22] ? rcu_read_lock_sched_held+0xd/0x70 [ 82.229977][ T22] ? rcu_read_lock_sched_held+0xd/0x70 [ 82.230006][ T22] handle_remove+0xa2/0x5fe [ 82.230029][ T22] ? lock_downgrade+0x6e0/0x6e0 [ 82.230051][ T22] ? cacheinfo_cpu_online.cold+0x3e/0x3e [ 82.230077][ T22] ? finish_task_switch.isra.0+0x232/0xa50 [ 82.230102][ T22] ? trace_hardirqs_on+0x5b/0x1c0 [ 82.230129][ T22] ? finish_task_switch.isra.0+0x232/0xa50 [ 82.230154][ T22] ? __switch_to+0x5cc/0x1060 [ 82.230179][ T22] ? rcu_read_lock_sched_held+0xd/0x70 [ 82.230210][ T22] ? lock_acquire+0x442/0x510 [ 82.230233][ T22] ? rcu_read_lock_sched_held+0xd/0x70 [ 82.230265][ T22] ? lock_release+0x522/0x720 [ 82.230287][ T22] ? devtmpfsd+0xaa/0x2a3 [ 82.230316][ T22] ? lock_downgrade+0x6e0/0x6e0 [ 82.230339][ T22] ? do_raw_spin_lock+0x120/0x2b0 [ 82.230371][ T22] ? rwlock_bug.part.0+0x90/0x90 [ 82.230398][ T22] devtmpfsd+0x1b9/0x2a3 [ 82.230427][ T22] ? dmar_validate_one_drhd+0x24d/0x24d [ 82.230459][ T22] kthread+0x3e5/0x4d0 [ 82.230484][ T22] ? set_kthread_struct+0x130/0x130 [ 82.230512][ T22] ret_from_fork+0x1f/0x30 [ 82.230591][ T22] Kernel Offset: disabled