[ OK ] Started Getty on tty4. [ OK ] Started Getty on tty3. [ 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. [ 64.283261][ T22] ================================================================== [ 64.283273][ T22] BUG: KFENCE: use-after-free read in kvm_fastop_exception+0xf6a/0x1058 [ 64.283273][ T22] [ 64.283321][ T22] Use-after-free read at 0xffff88823bcfa020 (in kfence-#124): [ 64.283336][ T22] kvm_fastop_exception+0xf6a/0x1058 [ 64.283355][ T22] d_lookup+0xd8/0x170 [ 64.283377][ T22] lookup_dcache+0x1e/0x130 [ 64.283398][ T22] __lookup_hash+0x29/0x180 [ 64.283418][ T22] kern_path_locked+0x17e/0x320 [ 64.283440][ T22] handle_remove+0xa2/0x5fe [ 64.283463][ T22] devtmpfsd+0x1b9/0x2a3 [ 64.283484][ T22] kthread+0x3e5/0x4d0 [ 64.283506][ T22] ret_from_fork+0x1f/0x30 [ 64.283534][ T22] [ 64.283538][ T22] kfence-#124 [0xffff88823bcfa000-0xffff88823bcfafff, size=4096, cache=names_cache] allocated by task 22: [ 64.283578][ T22] getname_kernel+0x4e/0x370 [ 64.283600][ T22] kern_path_locked+0x71/0x320 [ 64.283620][ T22] handle_remove+0xa2/0x5fe [ 64.283642][ T22] devtmpfsd+0x1b9/0x2a3 [ 64.283661][ T22] kthread+0x3e5/0x4d0 [ 64.283682][ T22] ret_from_fork+0x1f/0x30 [ 64.283700][ T22] [ 64.283700][ T22] freed by task 22: [ 64.283727][ T22] putname.part.0+0xe1/0x120 [ 64.283749][ T22] kern_path_locked+0xc2/0x320 [ 64.283771][ T22] handle_remove+0xa2/0x5fe [ 64.283793][ T22] devtmpfsd+0x1b9/0x2a3 [ 64.283812][ T22] kthread+0x3e5/0x4d0 [ 64.283829][ T22] ret_from_fork+0x1f/0x30 [ 64.283847][ T22] [ 64.283852][ T22] CPU: 1 PID: 22 Comm: kdevtmpfs Not tainted 5.14.0-syzkaller #0 [ 64.283874][ T22] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 64.283886][ T22] RIP: 0010:kvm_fastop_exception+0xf6a/0x1058 [ 64.283909][ 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 [ 64.283931][ T22] RSP: 0018:ffffc90000dcfae8 EFLAGS: 00010282 [ 64.283950][ T22] RAX: 0000003475736376 RBX: ffff88806ddb21b8 RCX: ffff88823bcfa020 [ 64.283966][ T22] RDX: ffffed100dbb643e RSI: 0000000000000005 RDI: 0000000000000007 [ 64.283979][ T22] RBP: 0000000000000005 R08: 0000000000000000 R09: ffff88806ddb21e8 [ 64.283993][ T22] R10: ffffed100dbb643d R11: 0000000000000000 R12: ffff88823bcfa020 [ 64.284008][ T22] R13: ffff88823bcfa020 R14: ffff88806ddb21e8 R15: dffffc0000000000 [ 64.284022][ T22] FS: 0000000000000000(0000) GS:ffff8880b9d00000(0000) knlGS:0000000000000000 [ 64.284045][ T22] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 [ 64.284060][ T22] CR2: ffff88823bcfa020 CR3: 0000000017296000 CR4: 00000000001506e0 [ 64.284075][ T22] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 [ 64.284088][ T22] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 [ 64.284102][ T22] Call Trace: [ 64.284114][ T22] d_lookup+0xd8/0x170 [ 64.284140][ T22] lookup_dcache+0x1e/0x130 [ 64.284165][ T22] __lookup_hash+0x29/0x180 [ 64.284187][ T22] kern_path_locked+0x17e/0x320 [ 64.284210][ T22] ? filename_lookup+0x80/0x80 [ 64.284233][ T22] ? lockdep_hardirqs_on+0x79/0x100 [ 64.284259][ T22] handle_remove+0xa2/0x5fe [ 64.284287][ T22] ? cacheinfo_cpu_online.cold+0x3e/0x3e [ 64.284316][ T22] ? lockdep_hardirqs_on_prepare+0x400/0x400 [ 64.284342][ T22] ? lockdep_hardirqs_on+0x79/0x100 [ 64.284367][ T22] ? find_held_lock+0x2d/0x110 [ 64.284390][ T22] ? devtmpfsd+0xaa/0x2a3 [ 64.284412][ T22] ? lock_downgrade+0x6e0/0x6e0 [ 64.284435][ T22] ? do_raw_spin_lock+0x120/0x2b0 [ 64.284459][ T22] ? rwlock_bug.part.0+0x90/0x90 [ 64.284487][ T22] devtmpfsd+0x1b9/0x2a3 [ 64.284517][ T22] ? dmar_validate_one_drhd+0x24d/0x24d [ 64.284545][ T22] kthread+0x3e5/0x4d0 [ 64.284569][ T22] ? set_kthread_struct+0x130/0x130 [ 64.284596][ T22] ret_from_fork+0x1f/0x30 [ 64.284625][ T22] ================================================================== [ 64.284633][ T22] Kernel panic - not syncing: panic_on_warn set ... [ 64.284883][ T22] CPU: 1 PID: 22 Comm: kdevtmpfs Not tainted 5.14.0-syzkaller #0 [ 64.284907][ T22] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 64.284920][ T22] Call Trace: [ 64.284929][ T22] dump_stack_lvl+0xcd/0x134 [ 64.284957][ T22] panic+0x2b0/0x6dd [ 64.284980][ T22] ? __warn_printk+0xf3/0xf3 [ 64.285014][ T22] ? kfence_report_error.cold+0x2f3/0xa56 [ 64.285047][ T22] kfence_report_error.cold+0x304/0xa56 [ 64.285074][ T22] ? kvm_fastop_exception+0xf6a/0x1058 [ 64.285104][ T22] ? kfence_print_object+0x350/0x350 [ 64.285134][ T22] ? add_lock_to_list.constprop.0+0x185/0x370 [ 64.285159][ T22] ? kvm_fastop_exception+0xf6a/0x1058 [ 64.285181][ T22] ? d_lookup+0xd8/0x170 [ 64.285206][ T22] ? lookup_dcache+0x1e/0x130 [ 64.285230][ T22] ? __lookup_hash+0x29/0x180 [ 64.285255][ T22] ? kern_path_locked+0x17e/0x320 [ 64.285283][ T22] ? handle_remove+0xa2/0x5fe [ 64.285310][ T22] ? devtmpfsd+0x1b9/0x2a3 [ 64.285339][ T22] ? kthread+0x3e5/0x4d0 [ 64.285365][ T22] ? ret_from_fork+0x1f/0x30 [ 64.285443][ T22] ? mark_lock+0xef/0x17b0 [ 64.285479][ T22] kfence_handle_page_fault+0x203/0x630 [ 64.285519][ T22] page_fault_oops+0x1c5/0x6b0 [ 64.285543][ T22] ? __sanitizer_cov_trace_const_cmp2+0x22/0x80 [ 64.285572][ T22] ? is_prefetch.constprop.0+0xb7/0x530 [ 64.285596][ T22] ? dump_pagetable+0xc0/0xc0 [ 64.285620][ T22] ? pgtable_bad+0x90/0x90 [ 64.285648][ T22] ? search_bpf_extables+0x1d1/0x2f0 [ 64.285671][ T22] ? kvm_fastop_exception+0xf6a/0x1058 [ 64.285700][ T22] kernelmode_fixup_or_oops+0x219/0x280 [ 64.285731][ T22] __bad_area_nosemaphore+0x36d/0x400 [ 64.285757][ T22] ? spurious_kernel_fault+0x38d/0x5b0 [ 64.285787][ T22] do_kern_addr_fault+0x5b/0x70 [ 64.285812][ T22] exc_page_fault+0x155/0x180 [ 64.285836][ T22] asm_exc_page_fault+0x1e/0x30 [ 64.285861][ T22] RIP: 0010:kvm_fastop_exception+0xf6a/0x1058 [ 64.285885][ 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 [ 64.285906][ T22] RSP: 0018:ffffc90000dcfae8 EFLAGS: 00010282 [ 64.285927][ T22] RAX: 0000003475736376 RBX: ffff88806ddb21b8 RCX: ffff88823bcfa020 [ 64.285943][ T22] RDX: ffffed100dbb643e RSI: 0000000000000005 RDI: 0000000000000007 [ 64.285958][ T22] RBP: 0000000000000005 R08: 0000000000000000 R09: ffff88806ddb21e8 [ 64.285972][ T22] R10: ffffed100dbb643d R11: 0000000000000000 R12: ffff88823bcfa020 [ 64.285988][ T22] R13: ffff88823bcfa020 R14: ffff88806ddb21e8 R15: dffffc0000000000 [ 64.286023][ T22] ? __d_lookup+0x372/0x720 [ 64.286058][ T22] d_lookup+0xd8/0x170 [ 64.286085][ T22] lookup_dcache+0x1e/0x130 [ 64.286113][ T22] __lookup_hash+0x29/0x180 [ 64.286143][ T22] kern_path_locked+0x17e/0x320 [ 64.286173][ T22] ? filename_lookup+0x80/0x80 [ 64.286202][ T22] ? lockdep_hardirqs_on+0x79/0x100 [ 64.286238][ T22] handle_remove+0xa2/0x5fe [ 64.286271][ T22] ? cacheinfo_cpu_online.cold+0x3e/0x3e [ 64.286306][ T22] ? lockdep_hardirqs_on_prepare+0x400/0x400 [ 64.286333][ T22] ? lockdep_hardirqs_on+0x79/0x100 [ 64.286368][ T22] ? find_held_lock+0x2d/0x110 [ 64.286397][ T22] ? devtmpfsd+0xaa/0x2a3 [ 64.286422][ T22] ? lock_downgrade+0x6e0/0x6e0 [ 64.286446][ T22] ? do_raw_spin_lock+0x120/0x2b0 [ 64.286474][ T22] ? rwlock_bug.part.0+0x90/0x90 [ 64.286518][ T22] devtmpfsd+0x1b9/0x2a3 [ 64.286546][ T22] ? dmar_validate_one_drhd+0x24d/0x24d [ 64.286576][ T22] kthread+0x3e5/0x4d0 [ 64.286602][ T22] ? set_kthread_struct+0x130/0x130 [ 64.286634][ T22] ret_from_fork+0x1f/0x30 [ 64.287042][ T22] Kernel Offset: disabled