[ OK ] Started Getty on tty4. [ OK ] Started Getty on tty3. [ OK ] Started Getty on tty1. [ OK ] Started Getty on tty2. [ 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. [ 65.854406][ T22] ================================================================== [ 65.854419][ T22] BUG: KFENCE: use-after-free read in kvm_fastop_exception+0xf6a/0x1058 [ 65.854419][ T22] [ 65.854461][ T22] Use-after-free read at 0xffff88823bd1c020 (in kfence-#141): [ 65.854475][ T22] kvm_fastop_exception+0xf6a/0x1058 [ 65.854494][ T22] d_lookup+0xd8/0x170 [ 65.854515][ T22] lookup_dcache+0x1e/0x130 [ 65.854535][ T22] __lookup_hash+0x29/0x180 [ 65.854555][ T22] kern_path_locked+0x17e/0x320 [ 65.854577][ T22] handle_remove+0xa2/0x5fe [ 65.854599][ T22] devtmpfsd+0x1b9/0x2a3 [ 65.854618][ T22] kthread+0x3e5/0x4d0 [ 65.854638][ T22] ret_from_fork+0x1f/0x30 [ 65.854659][ T22] [ 65.854663][ T22] kfence-#141 [0xffff88823bd1c000-0xffff88823bd1cfff, size=4096, cache=names_cache] allocated by task 22: [ 65.854699][ T22] getname_kernel+0x4e/0x370 [ 65.854727][ T22] kern_path_locked+0x71/0x320 [ 65.854749][ T22] handle_remove+0xa2/0x5fe [ 65.854769][ T22] devtmpfsd+0x1b9/0x2a3 [ 65.854786][ T22] kthread+0x3e5/0x4d0 [ 65.854805][ T22] ret_from_fork+0x1f/0x30 [ 65.854824][ T22] [ 65.854824][ T22] freed by task 22: [ 65.854848][ T22] putname.part.0+0xe1/0x120 [ 65.854867][ T22] kern_path_locked+0xc2/0x320 [ 65.854888][ T22] handle_remove+0xa2/0x5fe [ 65.854908][ T22] devtmpfsd+0x1b9/0x2a3 [ 65.854925][ T22] kthread+0x3e5/0x4d0 [ 65.854943][ T22] ret_from_fork+0x1f/0x30 [ 65.854962][ T22] [ 65.854966][ T22] CPU: 1 PID: 22 Comm: kdevtmpfs Not tainted 5.14.0-syzkaller #0 [ 65.854987][ T22] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 65.854999][ T22] RIP: 0010:kvm_fastop_exception+0xf6a/0x1058 [ 65.855021][ T22] Code: d3 ed e9 ef d4 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 45 e2 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 35 ec 6e f8 bd [ 65.855040][ T22] RSP: 0000:ffffc90000dcfae8 EFLAGS: 00010282 [ 65.855058][ T22] RAX: 0000000034736376 RBX: ffff888072e994d0 RCX: ffff88823bd1c020 [ 65.855073][ T22] RDX: ffffed100e5d32a1 RSI: 0000000000000004 RDI: 0000000000000007 [ 65.855086][ T22] RBP: 0000000000000004 R08: 0000000000000000 R09: ffff888072e99500 [ 65.855099][ T22] R10: ffffed100e5d32a0 R11: 0000000000000000 R12: ffff88823bd1c020 [ 65.855112][ T22] R13: ffff88823bd1c020 R14: ffff888072e99500 R15: dffffc0000000000 [ 65.855127][ T22] FS: 0000000000000000(0000) GS:ffff8880b9d00000(0000) knlGS:0000000000000000 [ 65.855147][ T22] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 [ 65.855162][ T22] CR2: ffff88823bd1c020 CR3: 0000000072b68000 CR4: 00000000001506e0 [ 65.855175][ T22] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 [ 65.855187][ T22] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 [ 65.855200][ T22] Call Trace: [ 65.855211][ T22] d_lookup+0xd8/0x170 [ 65.855233][ T22] lookup_dcache+0x1e/0x130 [ 65.855255][ T22] __lookup_hash+0x29/0x180 [ 65.855278][ T22] kern_path_locked+0x17e/0x320 [ 65.855301][ T22] ? filename_lookup+0x80/0x80 [ 65.855329][ T22] handle_remove+0xa2/0x5fe [ 65.855353][ T22] ? cacheinfo_cpu_online.cold+0x3e/0x3e [ 65.855378][ T22] ? trace_hardirqs_on+0x38/0x1c0 [ 65.855402][ T22] ? lockdep_hardirqs_on_prepare+0x400/0x400 [ 65.855430][ T22] ? find_held_lock+0x2d/0x110 [ 65.855451][ T22] ? devtmpfsd+0xaa/0x2a3 [ 65.855471][ T22] ? lock_downgrade+0x6e0/0x6e0 [ 65.855491][ T22] ? do_raw_spin_lock+0x120/0x2b0 [ 65.855513][ T22] ? rwlock_bug.part.0+0x90/0x90 [ 65.855538][ T22] devtmpfsd+0x1b9/0x2a3 [ 65.855559][ T22] ? dmar_validate_one_drhd+0x24d/0x24d [ 65.855583][ T22] kthread+0x3e5/0x4d0 [ 65.855604][ T22] ? set_kthread_struct+0x130/0x130 [ 65.855628][ T22] ret_from_fork+0x1f/0x30 [ 65.855654][ T22] ================================================================== [ 65.855663][ T22] Kernel panic - not syncing: panic_on_warn set ... [ 65.855801][ T22] CPU: 1 PID: 22 Comm: kdevtmpfs Not tainted 5.14.0-syzkaller #0 [ 65.855823][ T22] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 65.855835][ T22] Call Trace: [ 65.855842][ T22] dump_stack_lvl+0xcd/0x134 [ 65.855866][ T22] panic+0x2b0/0x6dd [ 65.855887][ T22] ? __warn_printk+0xf3/0xf3 [ 65.855918][ T22] ? kfence_report_error.cold+0x2f3/0xa56 [ 65.855947][ T22] kfence_report_error.cold+0x304/0xa56 [ 65.855973][ T22] ? kvm_fastop_exception+0xf6a/0x1058 [ 65.855999][ T22] ? kfence_print_object+0x350/0x350 [ 65.856025][ T22] ? add_lock_to_list.constprop.0+0x185/0x370 [ 65.856048][ T22] ? kvm_fastop_exception+0xf6a/0x1058 [ 65.856069][ T22] ? d_lookup+0xd8/0x170 [ 65.856090][ T22] ? lookup_dcache+0x1e/0x130 [ 65.856112][ T22] ? __lookup_hash+0x29/0x180 [ 65.856135][ T22] ? kern_path_locked+0x17e/0x320 [ 65.856159][ T22] ? handle_remove+0xa2/0x5fe [ 65.856182][ T22] ? devtmpfsd+0x1b9/0x2a3 [ 65.856202][ T22] ? kthread+0x3e5/0x4d0 [ 65.856225][ T22] ? ret_from_fork+0x1f/0x30 [ 65.856289][ T22] ? mark_lock+0xef/0x17b0 [ 65.856322][ T22] kfence_handle_page_fault+0x203/0x630 [ 65.856353][ T22] page_fault_oops+0x1c5/0x6b0 [ 65.856376][ T22] ? __sanitizer_cov_trace_const_cmp2+0x22/0x80 [ 65.856402][ T22] ? is_prefetch.constprop.0+0xb7/0x530 [ 65.856425][ T22] ? dump_pagetable+0xc0/0xc0 [ 65.856448][ T22] ? pgtable_bad+0x90/0x90 [ 65.856472][ T22] ? search_bpf_extables+0x1d1/0x2f0 [ 65.856494][ T22] ? kvm_fastop_exception+0xf6a/0x1058 [ 65.856522][ T22] kernelmode_fixup_or_oops+0x219/0x280 [ 65.856549][ T22] __bad_area_nosemaphore+0x36d/0x400 [ 65.856574][ T22] ? spurious_kernel_fault+0x38d/0x5b0 [ 65.856601][ T22] do_kern_addr_fault+0x5b/0x70 [ 65.856625][ T22] exc_page_fault+0x155/0x180 [ 65.856649][ T22] asm_exc_page_fault+0x1e/0x30 [ 65.856673][ T22] RIP: 0010:kvm_fastop_exception+0xf6a/0x1058 [ 65.856696][ T22] Code: d3 ed e9 ef d4 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 45 e2 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 35 ec 6e f8 bd [ 65.856720][ T22] RSP: 0000:ffffc90000dcfae8 EFLAGS: 00010282 [ 65.856738][ T22] RAX: 0000000034736376 RBX: ffff888072e994d0 RCX: ffff88823bd1c020 [ 65.856754][ T22] RDX: ffffed100e5d32a1 RSI: 0000000000000004 RDI: 0000000000000007 [ 65.856768][ T22] RBP: 0000000000000004 R08: 0000000000000000 R09: ffff888072e99500 [ 65.856782][ T22] R10: ffffed100e5d32a0 R11: 0000000000000000 R12: ffff88823bd1c020 [ 65.856797][ T22] R13: ffff88823bd1c020 R14: ffff888072e99500 R15: dffffc0000000000 [ 65.856828][ T22] ? __d_lookup+0x372/0x720 [ 65.856863][ T22] d_lookup+0xd8/0x170 [ 65.856888][ T22] lookup_dcache+0x1e/0x130 [ 65.856913][ T22] __lookup_hash+0x29/0x180 [ 65.856940][ T22] kern_path_locked+0x17e/0x320 [ 65.856966][ T22] ? filename_lookup+0x80/0x80 [ 65.857004][ T22] handle_remove+0xa2/0x5fe [ 65.857033][ T22] ? cacheinfo_cpu_online.cold+0x3e/0x3e [ 65.857061][ T22] ? trace_hardirqs_on+0x38/0x1c0 [ 65.857086][ T22] ? lockdep_hardirqs_on_prepare+0x400/0x400 [ 65.857123][ T22] ? find_held_lock+0x2d/0x110 [ 65.857149][ T22] ? devtmpfsd+0xaa/0x2a3 [ 65.857171][ T22] ? lock_downgrade+0x6e0/0x6e0 [ 65.857194][ T22] ? do_raw_spin_lock+0x120/0x2b0 [ 65.857219][ T22] ? rwlock_bug.part.0+0x90/0x90 [ 65.857252][ T22] devtmpfsd+0x1b9/0x2a3 [ 65.857277][ T22] ? dmar_validate_one_drhd+0x24d/0x24d [ 65.857305][ T22] kthread+0x3e5/0x4d0 [ 65.857328][ T22] ? set_kthread_struct+0x130/0x130 [ 65.857356][ T22] ret_from_fork+0x1f/0x30 [ 65.857817][ T22] Kernel Offset: disabled