[ 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. Starting Load/Save RF Kill Switch Status... [ OK ] Started Load/Save RF Kill Switch Status. [ 63.008996][ T22] ================================================================== [ 63.009006][ T22] BUG: KFENCE: use-after-free read in kvm_fastop_exception+0xf6a/0x1058 [ 63.009006][ T22] [ 63.009051][ T22] Use-after-free read at 0xffff88823bcca020 (in kfence-#100): [ 63.009064][ T22] kvm_fastop_exception+0xf6a/0x1058 [ 63.009081][ T22] d_lookup+0xd8/0x170 [ 63.009102][ T22] lookup_dcache+0x1e/0x130 [ 63.009121][ T22] __lookup_hash+0x29/0x180 [ 63.009139][ T22] kern_path_locked+0x17e/0x320 [ 63.009160][ T22] handle_remove+0xa2/0x5fe [ 63.009182][ T22] devtmpfsd+0x1b9/0x2a3 [ 63.009200][ T22] kthread+0x3e5/0x4d0 [ 63.009220][ T22] ret_from_fork+0x1f/0x30 [ 63.009239][ T22] [ 63.009242][ T22] kfence-#100 [0xffff88823bcca000-0xffff88823bccafff, size=4096, cache=names_cache] allocated by task 22: [ 63.009276][ T22] getname_kernel+0x4e/0x370 [ 63.009312][ T22] kern_path_locked+0x71/0x320 [ 63.009332][ T22] handle_remove+0xa2/0x5fe [ 63.009351][ T22] devtmpfsd+0x1b9/0x2a3 [ 63.009367][ T22] kthread+0x3e5/0x4d0 [ 63.009385][ T22] ret_from_fork+0x1f/0x30 [ 63.009403][ T22] [ 63.009403][ T22] freed by task 22: [ 63.009426][ T22] putname.part.0+0xe1/0x120 [ 63.009444][ T22] kern_path_locked+0xc2/0x320 [ 63.009464][ T22] handle_remove+0xa2/0x5fe [ 63.009483][ T22] devtmpfsd+0x1b9/0x2a3 [ 63.009500][ T22] kthread+0x3e5/0x4d0 [ 63.009518][ T22] ret_from_fork+0x1f/0x30 [ 63.009535][ T22] [ 63.009539][ T22] CPU: 1 PID: 22 Comm: kdevtmpfs Not tainted 5.14.0-syzkaller #0 [ 63.009558][ T22] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 63.009569][ T22] RIP: 0010:kvm_fastop_exception+0xf6a/0x1058 [ 63.009589][ T22] Code: d3 ed e9 bf d2 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 e0 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 ea 6e f8 bd [ 63.009606][ T22] RSP: 0018:ffffc90000dcfae8 EFLAGS: 00010282 [ 63.009622][ T22] RAX: 0000000032736376 RBX: ffff88806f6c4c00 RCX: ffff88823bcca020 [ 63.009635][ T22] RDX: ffffed100ded8987 RSI: 0000000000000004 RDI: 0000000000000007 [ 63.009647][ T22] RBP: 0000000000000004 R08: 0000000000000000 R09: ffff88806f6c4c30 [ 63.009658][ T22] R10: ffffed100ded8986 R11: 0000000000000000 R12: ffff88823bcca020 [ 63.009670][ T22] R13: ffff88823bcca020 R14: ffff88806f6c4c30 R15: dffffc0000000000 [ 63.009683][ T22] FS: 0000000000000000(0000) GS:ffff8880b9d00000(0000) knlGS:0000000000000000 [ 63.009702][ T22] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 [ 63.009715][ T22] CR2: ffff88823bcca020 CR3: 0000000074898000 CR4: 00000000001506e0 [ 63.009728][ T22] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 [ 63.009738][ T22] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 [ 63.009750][ T22] Call Trace: [ 63.009760][ T22] d_lookup+0xd8/0x170 [ 63.009781][ T22] lookup_dcache+0x1e/0x130 [ 63.009802][ T22] __lookup_hash+0x29/0x180 [ 63.009824][ T22] kern_path_locked+0x17e/0x320 [ 63.009846][ T22] ? filename_lookup+0x80/0x80 [ 63.009872][ T22] handle_remove+0xa2/0x5fe [ 63.009895][ T22] ? cacheinfo_cpu_online.cold+0x3e/0x3e [ 63.009920][ T22] ? lockdep_hardirqs_on_prepare+0x400/0x400 [ 63.009941][ T22] ? finish_task_switch.isra.0+0x232/0xa50 [ 63.009965][ T22] ? find_held_lock+0x2d/0x110 [ 63.009984][ T22] ? devtmpfsd+0xaa/0x2a3 [ 63.010003][ T22] ? lock_downgrade+0x6e0/0x6e0 [ 63.010022][ T22] ? do_raw_spin_lock+0x120/0x2b0 [ 63.010043][ T22] ? rwlock_bug.part.0+0x90/0x90 [ 63.010066][ T22] devtmpfsd+0x1b9/0x2a3 [ 63.010086][ T22] ? dmar_validate_one_drhd+0x24d/0x24d [ 63.010108][ T22] kthread+0x3e5/0x4d0 [ 63.010128][ T22] ? set_kthread_struct+0x130/0x130 [ 63.010150][ T22] ret_from_fork+0x1f/0x30 [ 63.010176][ T22] ================================================================== [ 63.010183][ T22] Kernel panic - not syncing: panic_on_warn set ... [ 63.010342][ T22] CPU: 1 PID: 22 Comm: kdevtmpfs Not tainted 5.14.0-syzkaller #0 [ 63.010362][ T22] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 63.010372][ T22] Call Trace: [ 63.010379][ T22] dump_stack_lvl+0xcd/0x134 [ 63.010402][ T22] panic+0x2b0/0x6dd [ 63.010421][ T22] ? __warn_printk+0xf3/0xf3 [ 63.010450][ T22] ? kfence_report_error.cold+0x2f3/0xa56 [ 63.010476][ T22] kfence_report_error.cold+0x304/0xa56 [ 63.010499][ T22] ? kvm_fastop_exception+0xf6a/0x1058 [ 63.010524][ T22] ? kfence_print_object+0x350/0x350 [ 63.010548][ T22] ? add_lock_to_list.constprop.0+0x185/0x370 [ 63.010569][ T22] ? kvm_fastop_exception+0xf6a/0x1058 [ 63.010587][ T22] ? d_lookup+0xd8/0x170 [ 63.010607][ T22] ? lookup_dcache+0x1e/0x130 [ 63.010628][ T22] ? __lookup_hash+0x29/0x180 [ 63.010649][ T22] ? kern_path_locked+0x17e/0x320 [ 63.010672][ T22] ? handle_remove+0xa2/0x5fe [ 63.010694][ T22] ? devtmpfsd+0x1b9/0x2a3 [ 63.010713][ T22] ? kthread+0x3e5/0x4d0 [ 63.010734][ T22] ? ret_from_fork+0x1f/0x30 [ 63.010796][ T22] ? mark_lock+0xef/0x17b0 [ 63.010828][ T22] kfence_handle_page_fault+0x203/0x630 [ 63.010858][ T22] page_fault_oops+0x1c5/0x6b0 [ 63.010880][ T22] ? __sanitizer_cov_trace_const_cmp2+0x22/0x80 [ 63.010904][ T22] ? is_prefetch.constprop.0+0xb7/0x530 [ 63.010926][ T22] ? dump_pagetable+0xc0/0xc0 [ 63.010946][ T22] ? pgtable_bad+0x90/0x90 [ 63.010969][ T22] ? search_bpf_extables+0x1d1/0x2f0 [ 63.010990][ T22] ? kvm_fastop_exception+0xf6a/0x1058 [ 63.011016][ T22] kernelmode_fixup_or_oops+0x219/0x280 [ 63.011040][ T22] __bad_area_nosemaphore+0x36d/0x400 [ 63.011063][ T22] ? spurious_kernel_fault+0x38d/0x5b0 [ 63.011088][ T22] do_kern_addr_fault+0x5b/0x70 [ 63.011110][ T22] exc_page_fault+0x155/0x180 [ 63.011132][ T22] asm_exc_page_fault+0x1e/0x30 [ 63.011154][ T22] RIP: 0010:kvm_fastop_exception+0xf6a/0x1058 [ 63.011175][ T22] Code: d3 ed e9 bf d2 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 e0 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 ea 6e f8 bd [ 63.011193][ T22] RSP: 0018:ffffc90000dcfae8 EFLAGS: 00010282 [ 63.011210][ T22] RAX: 0000000032736376 RBX: ffff88806f6c4c00 RCX: ffff88823bcca020 [ 63.011224][ T22] RDX: ffffed100ded8987 RSI: 0000000000000004 RDI: 0000000000000007 [ 63.011237][ T22] RBP: 0000000000000004 R08: 0000000000000000 R09: ffff88806f6c4c30 [ 63.011250][ T22] R10: ffffed100ded8986 R11: 0000000000000000 R12: ffff88823bcca020 [ 63.011263][ T22] R13: ffff88823bcca020 R14: ffff88806f6c4c30 R15: dffffc0000000000 [ 63.011299][ T22] ? __d_lookup+0x372/0x720 [ 63.011331][ T22] d_lookup+0xd8/0x170 [ 63.011356][ T22] lookup_dcache+0x1e/0x130 [ 63.011379][ T22] __lookup_hash+0x29/0x180 [ 63.011405][ T22] kern_path_locked+0x17e/0x320 [ 63.011429][ T22] ? filename_lookup+0x80/0x80 [ 63.011465][ T22] handle_remove+0xa2/0x5fe [ 63.011492][ T22] ? cacheinfo_cpu_online.cold+0x3e/0x3e [ 63.011522][ T22] ? lockdep_hardirqs_on_prepare+0x400/0x400 [ 63.011544][ T22] ? finish_task_switch.isra.0+0x232/0xa50 [ 63.011576][ T22] ? find_held_lock+0x2d/0x110 [ 63.011599][ T22] ? devtmpfsd+0xaa/0x2a3 [ 63.011620][ T22] ? lock_downgrade+0x6e0/0x6e0 [ 63.011641][ T22] ? do_raw_spin_lock+0x120/0x2b0 [ 63.011664][ T22] ? rwlock_bug.part.0+0x90/0x90 [ 63.011695][ T22] devtmpfsd+0x1b9/0x2a3 [ 63.011719][ T22] ? dmar_validate_one_drhd+0x24d/0x24d [ 63.011744][ T22] kthread+0x3e5/0x4d0 [ 63.011765][ T22] ? set_kthread_struct+0x130/0x130 [ 63.011792][ T22] ret_from_fork+0x1f/0x30 [ 63.012154][ T22] Kernel Offset: disabled [ 63.743138][ T22] Rebooting in 86400 seconds..