[ 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. [ 67.555571][ T22] ================================================================== [ 67.555583][ T22] BUG: KFENCE: use-after-free read in kvm_fastop_exception+0xf6a/0x1058 [ 67.555583][ T22] [ 67.555629][ T22] Use-after-free read at 0xffff88823bda0020 (in kfence-#207): [ 67.555644][ T22] kvm_fastop_exception+0xf6a/0x1058 [ 67.555664][ T22] d_lookup+0xd8/0x170 [ 67.555686][ T22] lookup_dcache+0x1e/0x130 [ 67.555708][ T22] __lookup_hash+0x29/0x180 [ 67.555729][ T22] kern_path_locked+0x17e/0x320 [ 67.555754][ T22] handle_remove+0xa2/0x5fe [ 67.555780][ T22] devtmpfsd+0x1b9/0x2a3 [ 67.555800][ T22] kthread+0x3e5/0x4d0 [ 67.555821][ T22] ret_from_fork+0x1f/0x30 [ 67.555843][ T22] [ 67.555847][ T22] kfence-#207 [0xffff88823bda0000-0xffff88823bda0fff, size=4096, cache=names_cache] allocated by task 22: [ 67.555884][ T22] getname_kernel+0x4e/0x370 [ 67.555908][ T22] kern_path_locked+0x71/0x320 [ 67.555929][ T22] handle_remove+0xa2/0x5fe [ 67.555949][ T22] devtmpfsd+0x1b9/0x2a3 [ 67.555968][ T22] kthread+0x3e5/0x4d0 [ 67.555986][ T22] ret_from_fork+0x1f/0x30 [ 67.556006][ T22] [ 67.556006][ T22] freed by task 22: [ 67.556033][ T22] putname.part.0+0xe1/0x120 [ 67.556054][ T22] kern_path_locked+0xc2/0x320 [ 67.556076][ T22] handle_remove+0xa2/0x5fe [ 67.556097][ T22] devtmpfsd+0x1b9/0x2a3 [ 67.556115][ T22] kthread+0x3e5/0x4d0 [ 67.556133][ T22] ret_from_fork+0x1f/0x30 [ 67.556152][ T22] [ 67.556156][ T22] CPU: 0 PID: 22 Comm: kdevtmpfs Not tainted 5.14.0-syzkaller #0 [ 67.556186][ T22] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 67.556202][ T22] RIP: 0010:kvm_fastop_exception+0xf6a/0x1058 [ 67.556227][ T22] Code: d3 ed e9 df 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 35 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 25 ea 6e f8 bd [ 67.556246][ T22] RSP: 0018:ffffc90000dcfae8 EFLAGS: 00010282 [ 67.556265][ T22] RAX: 0000000033736376 RBX: ffff88806f2bb1e0 RCX: ffff88823bda0020 [ 67.556279][ T22] RDX: ffffed100de57643 RSI: 0000000000000004 RDI: 0000000000000007 [ 67.556292][ T22] RBP: 0000000000000004 R08: 0000000000000000 R09: ffff88806f2bb210 [ 67.556305][ T22] R10: ffffed100de57642 R11: 0000000000000000 R12: ffff88823bda0020 [ 67.556318][ T22] R13: ffff88823bda0020 R14: ffff88806f2bb210 R15: dffffc0000000000 [ 67.556333][ T22] FS: 0000000000000000(0000) GS:ffff8880b9c00000(0000) knlGS:0000000000000000 [ 67.556354][ T22] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 [ 67.556369][ T22] CR2: ffff88823bda0020 CR3: 000000007298a000 CR4: 00000000001506f0 [ 67.556383][ T22] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 [ 67.556395][ T22] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 [ 67.556408][ T22] Call Trace: [ 67.556419][ T22] d_lookup+0xd8/0x170 [ 67.556454][ T22] lookup_dcache+0x1e/0x130 [ 67.556477][ T22] __lookup_hash+0x29/0x180 [ 67.556502][ T22] kern_path_locked+0x17e/0x320 [ 67.556525][ T22] ? filename_lookup+0x80/0x80 [ 67.556550][ T22] handle_remove+0xa2/0x5fe [ 67.556572][ T22] ? cacheinfo_cpu_online.cold+0x3e/0x3e [ 67.556597][ T22] ? lockdep_hardirqs_on_prepare+0x400/0x400 [ 67.556619][ T22] ? finish_task_switch.isra.0+0x232/0xa50 [ 67.556648][ T22] ? find_held_lock+0x2d/0x110 [ 67.556671][ T22] ? devtmpfsd+0xaa/0x2a3 [ 67.556693][ T22] ? lock_downgrade+0x6e0/0x6e0 [ 67.556716][ T22] ? do_raw_spin_lock+0x120/0x2b0 [ 67.556741][ T22] ? rwlock_bug.part.0+0x90/0x90 [ 67.556768][ T22] devtmpfsd+0x1b9/0x2a3 [ 67.556816][ T22] ? dmar_validate_one_drhd+0x24d/0x24d [ 67.556842][ T22] kthread+0x3e5/0x4d0 [ 67.556866][ T22] ? set_kthread_struct+0x130/0x130 [ 67.556893][ T22] ret_from_fork+0x1f/0x30 [ 67.556923][ T22] ================================================================== [ 67.556932][ T22] Kernel panic - not syncing: panic_on_warn set ... [ 67.557230][ T22] CPU: 0 PID: 22 Comm: kdevtmpfs Not tainted 5.14.0-syzkaller #0 [ 67.557254][ T22] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 67.557267][ T22] Call Trace: [ 67.557275][ T22] dump_stack_lvl+0xcd/0x134 [ 67.557301][ T22] panic+0x2b0/0x6dd [ 67.557324][ T22] ? __warn_printk+0xf3/0xf3 [ 67.557358][ T22] ? kfence_report_error.cold+0x2f3/0xa56 [ 67.557390][ T22] kfence_report_error.cold+0x304/0xa56 [ 67.557417][ T22] ? kvm_fastop_exception+0xf6a/0x1058 [ 67.557452][ T22] ? kfence_print_object+0x350/0x350 [ 67.557482][ T22] ? add_lock_to_list.constprop.0+0x185/0x370 [ 67.557506][ T22] ? kvm_fastop_exception+0xf6a/0x1058 [ 67.557529][ T22] ? d_lookup+0xd8/0x170 [ 67.557553][ T22] ? lookup_dcache+0x1e/0x130 [ 67.557578][ T22] ? __lookup_hash+0x29/0x180 [ 67.557603][ T22] ? kern_path_locked+0x17e/0x320 [ 67.557630][ T22] ? handle_remove+0xa2/0x5fe [ 67.557657][ T22] ? devtmpfsd+0x1b9/0x2a3 [ 67.557681][ T22] ? kthread+0x3e5/0x4d0 [ 67.557706][ T22] ? ret_from_fork+0x1f/0x30 [ 67.557781][ T22] ? mark_lock+0xef/0x17b0 [ 67.557820][ T22] kfence_handle_page_fault+0x203/0x630 [ 67.557855][ T22] page_fault_oops+0x1c5/0x6b0 [ 67.557879][ T22] ? __sanitizer_cov_trace_const_cmp2+0x22/0x80 [ 67.557907][ T22] ? is_prefetch.constprop.0+0xb7/0x530 [ 67.557929][ T22] ? dump_pagetable+0xc0/0xc0 [ 67.557952][ T22] ? pgtable_bad+0x90/0x90 [ 67.557979][ T22] ? search_bpf_extables+0x1d1/0x2f0 [ 67.558003][ T22] ? kvm_fastop_exception+0xf6a/0x1058 [ 67.558034][ T22] kernelmode_fixup_or_oops+0x219/0x280 [ 67.558062][ T22] __bad_area_nosemaphore+0x36d/0x400 [ 67.558088][ T22] ? spurious_kernel_fault+0x38d/0x5b0 [ 67.558117][ T22] do_kern_addr_fault+0x5b/0x70 [ 67.558142][ T22] exc_page_fault+0x155/0x180 [ 67.558168][ T22] asm_exc_page_fault+0x1e/0x30 [ 67.558193][ T22] RIP: 0010:kvm_fastop_exception+0xf6a/0x1058 [ 67.558217][ T22] Code: d3 ed e9 df 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 35 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 25 ea 6e f8 bd [ 67.558238][ T22] RSP: 0018:ffffc90000dcfae8 EFLAGS: 00010282 [ 67.558259][ T22] RAX: 0000000033736376 RBX: ffff88806f2bb1e0 RCX: ffff88823bda0020 [ 67.558276][ T22] RDX: ffffed100de57643 RSI: 0000000000000004 RDI: 0000000000000007 [ 67.558290][ T22] RBP: 0000000000000004 R08: 0000000000000000 R09: ffff88806f2bb210 [ 67.558305][ T22] R10: ffffed100de57642 R11: 0000000000000000 R12: ffff88823bda0020 [ 67.558320][ T22] R13: ffff88823bda0020 R14: ffff88806f2bb210 R15: dffffc0000000000 [ 67.558357][ T22] ? __d_lookup+0x372/0x720 [ 67.558397][ T22] d_lookup+0xd8/0x170 [ 67.558433][ T22] lookup_dcache+0x1e/0x130 [ 67.558463][ T22] __lookup_hash+0x29/0x180 [ 67.558494][ T22] kern_path_locked+0x17e/0x320 [ 67.558523][ T22] ? filename_lookup+0x80/0x80 [ 67.558569][ T22] handle_remove+0xa2/0x5fe [ 67.558602][ T22] ? cacheinfo_cpu_online.cold+0x3e/0x3e [ 67.558637][ T22] ? lockdep_hardirqs_on_prepare+0x400/0x400 [ 67.558665][ T22] ? finish_task_switch.isra.0+0x232/0xa50 [ 67.558705][ T22] ? find_held_lock+0x2d/0x110 [ 67.558734][ T22] ? devtmpfsd+0xaa/0x2a3 [ 67.558760][ T22] ? lock_downgrade+0x6e0/0x6e0 [ 67.558785][ T22] ? do_raw_spin_lock+0x120/0x2b0 [ 67.558812][ T22] ? rwlock_bug.part.0+0x90/0x90 [ 67.558849][ T22] devtmpfsd+0x1b9/0x2a3 [ 67.558877][ T22] ? dmar_validate_one_drhd+0x24d/0x24d [ 67.558908][ T22] kthread+0x3e5/0x4d0 [ 67.558933][ T22] ? set_kthread_struct+0x130/0x130 [ 67.558964][ T22] ret_from_fork+0x1f/0x30 [ 67.559401][ T22] Kernel Offset: disabled