[ OK ] Started Getty on tty2. [ OK ] Started Serial Getty on ttyS0. [ OK ] Started Getty on tty1. [ 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. [ 51.414879][ T22] ================================================================== [ 51.414890][ T22] BUG: KFENCE: use-after-free read in kvm_fastop_exception+0xf6a/0x1058 [ 51.414890][ T22] [ 51.414937][ T22] Use-after-free read at 0xffff88823bdb0020 (in kfence-#215): [ 51.414950][ T22] kvm_fastop_exception+0xf6a/0x1058 [ 51.414968][ T22] d_lookup+0xd8/0x170 [ 51.414988][ T22] lookup_dcache+0x1e/0x130 [ 51.415006][ T22] __lookup_hash+0x29/0x180 [ 51.415024][ T22] kern_path_locked+0x17e/0x320 [ 51.415045][ T22] handle_remove+0xa2/0x5fe [ 51.415065][ T22] devtmpfsd+0x1b9/0x2a3 [ 51.415083][ T22] kthread+0x3e5/0x4d0 [ 51.415101][ T22] ret_from_fork+0x1f/0x30 [ 51.415120][ T22] [ 51.415123][ T22] kfence-#215: 0xffff88823bdb0000-0xffff88823bdb0fff, size=4096, cache=names_cache [ 51.415123][ T22] [ 51.415141][ T22] allocated by task 22 on cpu 0 at 51.414793s: [ 51.415169][ T22] getname_kernel+0x4e/0x370 [ 51.415189][ T22] kern_path_locked+0x71/0x320 [ 51.415208][ T22] handle_remove+0xa2/0x5fe [ 51.415227][ T22] devtmpfsd+0x1b9/0x2a3 [ 51.415244][ T22] kthread+0x3e5/0x4d0 [ 51.415261][ T22] ret_from_fork+0x1f/0x30 [ 51.415278][ T22] [ 51.415281][ T22] freed by task 22 on cpu 0 at 51.414806s: [ 51.415311][ T22] putname.part.0+0xe1/0x120 [ 51.415329][ T22] kern_path_locked+0xc2/0x320 [ 51.415349][ T22] handle_remove+0xa2/0x5fe [ 51.415368][ T22] devtmpfsd+0x1b9/0x2a3 [ 51.415384][ T22] kthread+0x3e5/0x4d0 [ 51.415402][ T22] ret_from_fork+0x1f/0x30 [ 51.415419][ T22] [ 51.415423][ T22] CPU: 0 PID: 22 Comm: kdevtmpfs Not tainted 5.14.0-syzkaller #0 [ 51.415442][ T22] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 51.415452][ T22] RIP: 0010:kvm_fastop_exception+0xf6a/0x1058 [ 51.415473][ 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 [ 51.415491][ T22] RSP: 0018:ffffc90000dcfae8 EFLAGS: 00010282 [ 51.415507][ T22] RAX: 0000000032736376 RBX: ffff88806c8f8330 RCX: ffff88823bdb0020 [ 51.415521][ T22] RDX: ffffed100d91f06d RSI: 0000000000000004 RDI: 0000000000000007 [ 51.415532][ T22] RBP: 0000000000000004 R08: 0000000000000000 R09: ffff88806c8f8360 [ 51.415544][ T22] R10: ffffed100d91f06c R11: 0000000000000000 R12: ffff88823bdb0020 [ 51.415556][ T22] R13: ffff88823bdb0020 R14: ffff88806c8f8360 R15: dffffc0000000000 [ 51.415573][ T22] FS: 0000000000000000(0000) GS:ffff8880b9c00000(0000) knlGS:0000000000000000 [ 51.415596][ T22] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 [ 51.415608][ T22] CR2: ffff88823bdb0020 CR3: 000000000b68e000 CR4: 0000000000350ef0 [ 51.415621][ T22] Call Trace: [ 51.415629][ T22] d_lookup+0xd8/0x170 [ 51.415650][ T22] lookup_dcache+0x1e/0x130 [ 51.415670][ T22] __lookup_hash+0x29/0x180 [ 51.415691][ T22] kern_path_locked+0x17e/0x320 [ 51.415713][ T22] ? filename_lookup+0x80/0x80 [ 51.415738][ T22] handle_remove+0xa2/0x5fe [ 51.415760][ T22] ? cacheinfo_cpu_online.cold+0x3e/0x3e [ 51.415785][ T22] ? lockdep_hardirqs_on_prepare+0x400/0x400 [ 51.415807][ T22] ? finish_task_switch.isra.0+0x232/0xa50 [ 51.415830][ T22] ? find_held_lock+0x2d/0x110 [ 51.415849][ T22] ? devtmpfsd+0xaa/0x2a3 [ 51.415867][ T22] ? lock_downgrade+0x6e0/0x6e0 [ 51.415886][ T22] ? do_raw_spin_lock+0x120/0x2b0 [ 51.415907][ T22] ? rwlock_bug.part.0+0x90/0x90 [ 51.415929][ T22] devtmpfsd+0x1b9/0x2a3 [ 51.415949][ T22] ? dmar_validate_one_drhd+0x24d/0x24d [ 51.415970][ T22] kthread+0x3e5/0x4d0 [ 51.415989][ T22] ? set_kthread_struct+0x130/0x130 [ 51.416012][ T22] ret_from_fork+0x1f/0x30 [ 51.416037][ T22] ================================================================== [ 51.416045][ T22] Kernel panic - not syncing: panic_on_warn set ... [ 51.416196][ T22] CPU: 0 PID: 22 Comm: kdevtmpfs Not tainted 5.14.0-syzkaller #0 [ 51.416217][ T22] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 51.416228][ T22] Call Trace: [ 51.416235][ T22] dump_stack_lvl+0xcd/0x134 [ 51.416257][ T22] panic+0x2b0/0x6dd [ 51.416276][ T22] ? __warn_printk+0xf3/0xf3 [ 51.416304][ T22] ? kfence_report_error.cold+0x2f3/0xa56 [ 51.416331][ T22] kfence_report_error.cold+0x304/0xa56 [ 51.416352][ T22] ? kvm_fastop_exception+0xf6a/0x1058 [ 51.416377][ T22] ? kfence_print_object+0x2e0/0x2e0 [ 51.416401][ T22] ? add_lock_to_list.constprop.0+0x185/0x370 [ 51.416422][ T22] ? kvm_fastop_exception+0xf6a/0x1058 [ 51.416441][ T22] ? d_lookup+0xd8/0x170 [ 51.416461][ T22] ? lookup_dcache+0x1e/0x130 [ 51.416481][ T22] ? __lookup_hash+0x29/0x180 [ 51.416501][ T22] ? kern_path_locked+0x17e/0x320 [ 51.416523][ T22] ? handle_remove+0xa2/0x5fe [ 51.416545][ T22] ? devtmpfsd+0x1b9/0x2a3 [ 51.416565][ T22] ? kthread+0x3e5/0x4d0 [ 51.416585][ T22] ? ret_from_fork+0x1f/0x30 [ 51.416654][ T22] ? mark_lock+0xef/0x17b0 [ 51.416686][ T22] kfence_handle_page_fault+0x203/0x630 [ 51.416715][ T22] page_fault_oops+0x1c5/0x6b0 [ 51.416736][ T22] ? __sanitizer_cov_trace_const_cmp2+0x22/0x80 [ 51.416760][ T22] ? is_prefetch.constprop.0+0xb7/0x530 [ 51.416782][ T22] ? dump_pagetable+0xc0/0xc0 [ 51.416802][ T22] ? pgtable_bad+0x90/0x90 [ 51.416825][ T22] ? search_bpf_extables+0x1d1/0x2f0 [ 51.416845][ T22] ? kvm_fastop_exception+0xf6a/0x1058 [ 51.416872][ T22] kernelmode_fixup_or_oops+0x219/0x280 [ 51.416897][ T22] __bad_area_nosemaphore+0x36d/0x400 [ 51.416919][ T22] ? spurious_kernel_fault+0x38d/0x5b0 [ 51.416944][ T22] do_kern_addr_fault+0x5b/0x70 [ 51.416966][ T22] exc_page_fault+0x155/0x180 [ 51.416988][ T22] asm_exc_page_fault+0x1e/0x30 [ 51.417010][ T22] RIP: 0010:kvm_fastop_exception+0xf6a/0x1058 [ 51.417031][ 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 [ 51.417049][ T22] RSP: 0018:ffffc90000dcfae8 EFLAGS: 00010282 [ 51.417067][ T22] RAX: 0000000032736376 RBX: ffff88806c8f8330 RCX: ffff88823bdb0020 [ 51.417081][ T22] RDX: ffffed100d91f06d RSI: 0000000000000004 RDI: 0000000000000007 [ 51.417093][ T22] RBP: 0000000000000004 R08: 0000000000000000 R09: ffff88806c8f8360 [ 51.417105][ T22] R10: ffffed100d91f06c R11: 0000000000000000 R12: ffff88823bdb0020 [ 51.417119][ T22] R13: ffff88823bdb0020 R14: ffff88806c8f8360 R15: dffffc0000000000 [ 51.417148][ T22] ? __d_lookup+0x372/0x720 [ 51.417180][ T22] d_lookup+0xd8/0x170 [ 51.417204][ T22] lookup_dcache+0x1e/0x130 [ 51.417227][ T22] __lookup_hash+0x29/0x180 [ 51.417252][ T22] kern_path_locked+0x17e/0x320 [ 51.417276][ T22] ? filename_lookup+0x80/0x80 [ 51.417312][ T22] handle_remove+0xa2/0x5fe [ 51.417339][ T22] ? cacheinfo_cpu_online.cold+0x3e/0x3e [ 51.417367][ T22] ? lockdep_hardirqs_on_prepare+0x400/0x400 [ 51.417390][ T22] ? finish_task_switch.isra.0+0x232/0xa50 [ 51.417421][ T22] ? find_held_lock+0x2d/0x110 [ 51.417445][ T22] ? devtmpfsd+0xaa/0x2a3 [ 51.417466][ T22] ? lock_downgrade+0x6e0/0x6e0 [ 51.417486][ T22] ? do_raw_spin_lock+0x120/0x2b0 [ 51.417509][ T22] ? rwlock_bug.part.0+0x90/0x90 [ 51.417542][ T22] devtmpfsd+0x1b9/0x2a3 [ 51.417568][ T22] ? dmar_validate_one_drhd+0x24d/0x24d [ 51.417601][ T22] kthread+0x3e5/0x4d0 [ 51.417622][ T22] ? set_kthread_struct+0x130/0x130 [ 51.417648][ T22] ret_from_fork+0x1f/0x30 [ 51.418733][ T22] Kernel Offset: disabled