Starting Update UTMP about System Runlevel Changes... [ OK ] Started Load/Save RF Kill Switch Status. [ OK ] Started Update UTMP about System Runlevel Changes. [ 69.299359][ T22] ================================================================== [ 69.299371][ T22] BUG: KFENCE: use-after-free read in kvm_fastop_exception+0xf6a/0x1058 [ 69.299371][ T22] [ 69.299417][ T22] Use-after-free read at 0xffff88823bd7e020 (in kfence-#190): [ 69.299430][ T22] kvm_fastop_exception+0xf6a/0x1058 [ 69.299449][ T22] d_lookup+0xd8/0x170 [ 69.299476][ T22] lookup_dcache+0x1e/0x130 [ 69.299497][ T22] __lookup_hash+0x29/0x180 [ 69.299516][ T22] kern_path_locked+0x17e/0x320 [ 69.299538][ T22] handle_remove+0xa2/0x5fe [ 69.299560][ T22] devtmpfsd+0x1b9/0x2a3 [ 69.299579][ T22] kthread+0x3e5/0x4d0 [ 69.299600][ T22] ret_from_fork+0x1f/0x30 [ 69.299620][ T22] [ 69.299624][ T22] kfence-#190 [0xffff88823bd7e000-0xffff88823bd7efff, size=4096, cache=names_cache] allocated by task 22: [ 69.299661][ T22] getname_kernel+0x4e/0x370 [ 69.299682][ T22] kern_path_locked+0x71/0x320 [ 69.299703][ T22] handle_remove+0xa2/0x5fe [ 69.299723][ T22] devtmpfsd+0x1b9/0x2a3 [ 69.299740][ T22] kthread+0x3e5/0x4d0 [ 69.299759][ T22] ret_from_fork+0x1f/0x30 [ 69.299777][ T22] [ 69.299777][ T22] freed by task 22: [ 69.299801][ T22] putname.part.0+0xe1/0x120 [ 69.299820][ T22] kern_path_locked+0xc2/0x320 [ 69.299841][ T22] handle_remove+0xa2/0x5fe [ 69.299861][ T22] devtmpfsd+0x1b9/0x2a3 [ 69.299878][ T22] kthread+0x3e5/0x4d0 [ 69.299896][ T22] ret_from_fork+0x1f/0x30 [ 69.299915][ T22] [ 69.299919][ T22] CPU: 0 PID: 22 Comm: kdevtmpfs Not tainted 5.14.0-syzkaller #0 [ 69.299940][ T22] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 69.299952][ T22] RIP: 0010:kvm_fastop_exception+0xf6a/0x1058 [ 69.299974][ 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 [ 69.299993][ T22] RSP: 0018:ffffc90000dcfae8 EFLAGS: 00010282 [ 69.300011][ T22] RAX: 0000000033736376 RBX: ffff888074f35358 RCX: ffff88823bd7e020 [ 69.300025][ T22] RDX: ffffed100e9e6a72 RSI: 0000000000000004 RDI: 0000000000000007 [ 69.300038][ T22] RBP: 0000000000000004 R08: 0000000000000000 R09: ffff888074f35388 [ 69.300051][ T22] R10: ffffed100e9e6a71 R11: 0000000000000000 R12: ffff88823bd7e020 [ 69.300065][ T22] R13: ffff88823bd7e020 R14: ffff888074f35388 R15: dffffc0000000000 [ 69.300079][ T22] FS: 0000000000000000(0000) GS:ffff8880b9c00000(0000) knlGS:0000000000000000 [ 69.300099][ T22] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 [ 69.300114][ T22] CR2: ffff88823bd7e020 CR3: 000000007388e000 CR4: 00000000001506f0 [ 69.300127][ T22] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 [ 69.300139][ T22] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 [ 69.300152][ T22] Call Trace: [ 69.300162][ T22] d_lookup+0xd8/0x170 [ 69.300185][ T22] lookup_dcache+0x1e/0x130 [ 69.300207][ T22] __lookup_hash+0x29/0x180 [ 69.300230][ T22] kern_path_locked+0x17e/0x320 [ 69.300253][ T22] ? filename_lookup+0x80/0x80 [ 69.300281][ T22] handle_remove+0xa2/0x5fe [ 69.300305][ T22] ? cacheinfo_cpu_online.cold+0x3e/0x3e [ 69.300332][ T22] ? lockdep_hardirqs_on_prepare+0x400/0x400 [ 69.300355][ T22] ? finish_task_switch.isra.0+0x232/0xa50 [ 69.300381][ T22] ? find_held_lock+0x2d/0x110 [ 69.300402][ T22] ? devtmpfsd+0xaa/0x2a3 [ 69.300423][ T22] ? lock_downgrade+0x6e0/0x6e0 [ 69.300443][ T22] ? do_raw_spin_lock+0x120/0x2b0 [ 69.300465][ T22] ? rwlock_bug.part.0+0x90/0x90 [ 69.300499][ T22] devtmpfsd+0x1b9/0x2a3 [ 69.300520][ T22] ? dmar_validate_one_drhd+0x24d/0x24d [ 69.300543][ T22] kthread+0x3e5/0x4d0 [ 69.300564][ T22] ? set_kthread_struct+0x130/0x130 [ 69.300589][ T22] ret_from_fork+0x1f/0x30 [ 69.300615][ T22] ================================================================== [ 69.300623][ T22] Kernel panic - not syncing: panic_on_warn set ... [ 69.300846][ T22] CPU: 0 PID: 22 Comm: kdevtmpfs Not tainted 5.14.0-syzkaller #0 [ 69.300868][ T22] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 69.300879][ T22] Call Trace: [ 69.300887][ T22] dump_stack_lvl+0xcd/0x134 [ 69.300910][ T22] panic+0x2b0/0x6dd [ 69.300931][ T22] ? __warn_printk+0xf3/0xf3 [ 69.300961][ T22] ? kfence_report_error.cold+0x2f3/0xa56 [ 69.300991][ T22] kfence_report_error.cold+0x304/0xa56 [ 69.301016][ T22] ? kvm_fastop_exception+0xf6a/0x1058 [ 69.301042][ T22] ? kfence_print_object+0x350/0x350 [ 69.301068][ T22] ? add_lock_to_list.constprop.0+0x185/0x370 [ 69.301091][ T22] ? kvm_fastop_exception+0xf6a/0x1058 [ 69.301111][ T22] ? d_lookup+0xd8/0x170 [ 69.301133][ T22] ? lookup_dcache+0x1e/0x130 [ 69.301155][ T22] ? __lookup_hash+0x29/0x180 [ 69.301177][ T22] ? kern_path_locked+0x17e/0x320 [ 69.301201][ T22] ? handle_remove+0xa2/0x5fe [ 69.301224][ T22] ? devtmpfsd+0x1b9/0x2a3 [ 69.301245][ T22] ? kthread+0x3e5/0x4d0 [ 69.301267][ T22] ? ret_from_fork+0x1f/0x30 [ 69.301331][ T22] ? mark_lock+0xef/0x17b0 [ 69.301364][ T22] kfence_handle_page_fault+0x203/0x630 [ 69.301395][ T22] page_fault_oops+0x1c5/0x6b0 [ 69.301418][ T22] ? __sanitizer_cov_trace_const_cmp2+0x22/0x80 [ 69.301444][ T22] ? is_prefetch.constprop.0+0xb7/0x530 [ 69.301467][ T22] ? dump_pagetable+0xc0/0xc0 [ 69.301494][ T22] ? pgtable_bad+0x90/0x90 [ 69.301519][ T22] ? search_bpf_extables+0x1d1/0x2f0 [ 69.301540][ T22] ? kvm_fastop_exception+0xf6a/0x1058 [ 69.301569][ T22] kernelmode_fixup_or_oops+0x219/0x280 [ 69.301596][ T22] __bad_area_nosemaphore+0x36d/0x400 [ 69.301620][ T22] ? spurious_kernel_fault+0x38d/0x5b0 [ 69.301647][ T22] do_kern_addr_fault+0x5b/0x70 [ 69.301672][ T22] exc_page_fault+0x155/0x180 [ 69.301696][ T22] asm_exc_page_fault+0x1e/0x30 [ 69.301719][ T22] RIP: 0010:kvm_fastop_exception+0xf6a/0x1058 [ 69.301742][ 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 [ 69.301762][ T22] RSP: 0018:ffffc90000dcfae8 EFLAGS: 00010282 [ 69.301780][ T22] RAX: 0000000033736376 RBX: ffff888074f35358 RCX: ffff88823bd7e020 [ 69.301796][ T22] RDX: ffffed100e9e6a72 RSI: 0000000000000004 RDI: 0000000000000007 [ 69.301810][ T22] RBP: 0000000000000004 R08: 0000000000000000 R09: ffff888074f35388 [ 69.301824][ T22] R10: ffffed100e9e6a71 R11: 0000000000000000 R12: ffff88823bd7e020 [ 69.301838][ T22] R13: ffff88823bd7e020 R14: ffff888074f35388 R15: dffffc0000000000 [ 69.301869][ T22] ? __d_lookup+0x372/0x720 [ 69.301903][ T22] d_lookup+0xd8/0x170 [ 69.301929][ T22] lookup_dcache+0x1e/0x130 [ 69.301953][ T22] __lookup_hash+0x29/0x180 [ 69.301980][ T22] kern_path_locked+0x17e/0x320 [ 69.302006][ T22] ? filename_lookup+0x80/0x80 [ 69.302043][ T22] handle_remove+0xa2/0x5fe [ 69.302071][ T22] ? cacheinfo_cpu_online.cold+0x3e/0x3e [ 69.302102][ T22] ? lockdep_hardirqs_on_prepare+0x400/0x400 [ 69.302127][ T22] ? finish_task_switch.isra.0+0x232/0xa50 [ 69.302160][ T22] ? find_held_lock+0x2d/0x110 [ 69.302186][ T22] ? devtmpfsd+0xaa/0x2a3 [ 69.302208][ T22] ? lock_downgrade+0x6e0/0x6e0 [ 69.302230][ T22] ? do_raw_spin_lock+0x120/0x2b0 [ 69.302255][ T22] ? rwlock_bug.part.0+0x90/0x90 [ 69.302288][ T22] devtmpfsd+0x1b9/0x2a3 [ 69.302312][ T22] ? dmar_validate_one_drhd+0x24d/0x24d [ 69.302339][ T22] kthread+0x3e5/0x4d0 [ 69.302362][ T22] ? set_kthread_struct+0x130/0x130 [ 69.302389][ T22] ret_from_fork+0x1f/0x30 [ 69.302775][ T22] Kernel Offset: disabled