[ 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. [ 69.952047][ T22] ================================================================== [ 69.952060][ T22] BUG: KFENCE: use-after-free read in kvm_fastop_exception+0xf6a/0x1058 [ 69.952060][ T22] [ 69.952112][ T22] Use-after-free read at 0xffff88823bdb8020 (in kfence-#219): [ 69.952126][ T22] kvm_fastop_exception+0xf6a/0x1058 [ 69.952146][ T22] d_lookup+0xd8/0x170 [ 69.952169][ T22] lookup_dcache+0x1e/0x130 [ 69.952199][ T22] __lookup_hash+0x29/0x180 [ 69.952221][ T22] kern_path_locked+0x17e/0x320 [ 69.952246][ T22] handle_remove+0xa2/0x5fe [ 69.952271][ T22] devtmpfsd+0x1b9/0x2a3 [ 69.952293][ T22] kthread+0x3e5/0x4d0 [ 69.952317][ T22] ret_from_fork+0x1f/0x30 [ 69.952340][ T22] [ 69.952345][ T22] kfence-#219 [0xffff88823bdb8000-0xffff88823bdb8fff, size=4096, cache=names_cache] allocated by task 22: [ 69.952388][ T22] getname_kernel+0x4e/0x370 [ 69.952413][ T22] kern_path_locked+0x71/0x320 [ 69.952437][ T22] handle_remove+0xa2/0x5fe [ 69.952461][ T22] devtmpfsd+0x1b9/0x2a3 [ 69.952482][ T22] kthread+0x3e5/0x4d0 [ 69.952504][ T22] ret_from_fork+0x1f/0x30 [ 69.952526][ T22] [ 69.952526][ T22] freed by task 22: [ 69.952554][ T22] putname.part.0+0xe1/0x120 [ 69.952576][ T22] kern_path_locked+0xc2/0x320 [ 69.952600][ T22] handle_remove+0xa2/0x5fe [ 69.952624][ T22] devtmpfsd+0x1b9/0x2a3 [ 69.952645][ T22] kthread+0x3e5/0x4d0 [ 69.952667][ T22] ret_from_fork+0x1f/0x30 [ 69.952689][ T22] [ 69.952694][ T22] CPU: 0 PID: 22 Comm: kdevtmpfs Not tainted 5.14.0-syzkaller #0 [ 69.952719][ T22] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 69.952732][ T22] RIP: 0010:kvm_fastop_exception+0xf6a/0x1058 [ 69.952759][ 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 [ 69.952781][ T22] RSP: 0018:ffffc90000dcfae8 EFLAGS: 00010282 [ 69.952802][ T22] RAX: 0000000034736376 RBX: ffff888071874040 RCX: ffff88823bdb8020 [ 69.952817][ T22] RDX: ffffed100e30e80f RSI: 0000000000000004 RDI: 0000000000000007 [ 69.952832][ T22] RBP: 0000000000000004 R08: 0000000000000000 R09: ffff888071874070 [ 69.952846][ T22] R10: ffffed100e30e80e R11: 0000000000000000 R12: ffff88823bdb8020 [ 69.952862][ T22] R13: ffff88823bdb8020 R14: ffff888071874070 R15: dffffc0000000000 [ 69.952878][ T22] FS: 0000000000000000(0000) GS:ffff8880b9c00000(0000) knlGS:0000000000000000 [ 69.952901][ T22] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 [ 69.952916][ T22] CR2: ffff88823bdb8020 CR3: 000000000b68e000 CR4: 00000000001506f0 [ 69.952930][ T22] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 [ 69.952942][ T22] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 [ 69.952956][ T22] Call Trace: [ 69.952967][ T22] d_lookup+0xd8/0x170 [ 69.952992][ T22] lookup_dcache+0x1e/0x130 [ 69.953025][ T22] __lookup_hash+0x29/0x180 [ 69.953050][ T22] kern_path_locked+0x17e/0x320 [ 69.953075][ T22] ? filename_lookup+0x80/0x80 [ 69.953105][ T22] handle_remove+0xa2/0x5fe [ 69.953132][ T22] ? cacheinfo_cpu_online.cold+0x3e/0x3e [ 69.953161][ T22] ? lockdep_hardirqs_on_prepare+0x400/0x400 [ 69.953186][ T22] ? finish_task_switch.isra.0+0x232/0xa50 [ 69.953223][ T22] ? find_held_lock+0x2d/0x110 [ 69.953245][ T22] ? devtmpfsd+0xaa/0x2a3 [ 69.953267][ T22] ? lock_downgrade+0x6e0/0x6e0 [ 69.953290][ T22] ? do_raw_spin_lock+0x120/0x2b0 [ 69.953317][ T22] ? rwlock_bug.part.0+0x90/0x90 [ 69.953345][ T22] devtmpfsd+0x1b9/0x2a3 [ 69.953370][ T22] ? dmar_validate_one_drhd+0x24d/0x24d [ 69.953395][ T22] kthread+0x3e5/0x4d0 [ 69.953418][ T22] ? set_kthread_struct+0x130/0x130 [ 69.953446][ T22] ret_from_fork+0x1f/0x30 [ 69.953477][ T22] ================================================================== [ 69.953487][ T22] Kernel panic - not syncing: panic_on_warn set ... [ 69.953829][ T22] CPU: 0 PID: 22 Comm: kdevtmpfs Not tainted 5.14.0-syzkaller #0 [ 69.953857][ T22] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 69.953870][ T22] Call Trace: [ 69.953879][ T22] dump_stack_lvl+0xcd/0x134 [ 69.953908][ T22] panic+0x2b0/0x6dd [ 69.953932][ T22] ? __warn_printk+0xf3/0xf3 [ 69.953969][ T22] ? kfence_report_error.cold+0x2f3/0xa56 [ 69.954003][ T22] kfence_report_error.cold+0x304/0xa56 [ 69.954032][ T22] ? kvm_fastop_exception+0xf6a/0x1058 [ 69.954063][ T22] ? kfence_print_object+0x350/0x350 [ 69.954092][ T22] ? add_lock_to_list.constprop.0+0x185/0x370 [ 69.954117][ T22] ? kvm_fastop_exception+0xf6a/0x1058 [ 69.954139][ T22] ? d_lookup+0xd8/0x170 [ 69.954163][ T22] ? lookup_dcache+0x1e/0x130 [ 69.954195][ T22] ? __lookup_hash+0x29/0x180 [ 69.954221][ T22] ? kern_path_locked+0x17e/0x320 [ 69.954248][ T22] ? handle_remove+0xa2/0x5fe [ 69.954276][ T22] ? devtmpfsd+0x1b9/0x2a3 [ 69.954300][ T22] ? kthread+0x3e5/0x4d0 [ 69.954326][ T22] ? ret_from_fork+0x1f/0x30 [ 69.954407][ T22] ? mark_lock+0xef/0x17b0 [ 69.954447][ T22] kfence_handle_page_fault+0x203/0x630 [ 69.954484][ T22] page_fault_oops+0x1c5/0x6b0 [ 69.954512][ T22] ? __sanitizer_cov_trace_const_cmp2+0x22/0x80 [ 69.954541][ T22] ? is_prefetch.constprop.0+0xb7/0x530 [ 69.954568][ T22] ? dump_pagetable+0xc0/0xc0 [ 69.954593][ T22] ? pgtable_bad+0x90/0x90 [ 69.954621][ T22] ? search_bpf_extables+0x1d1/0x2f0 [ 69.954646][ T22] ? kvm_fastop_exception+0xf6a/0x1058 [ 69.954678][ T22] kernelmode_fixup_or_oops+0x219/0x280 [ 69.954710][ T22] __bad_area_nosemaphore+0x36d/0x400 [ 69.954739][ T22] ? spurious_kernel_fault+0x38d/0x5b0 [ 69.954769][ T22] do_kern_addr_fault+0x5b/0x70 [ 69.954797][ T22] exc_page_fault+0x155/0x180 [ 69.954822][ T22] asm_exc_page_fault+0x1e/0x30 [ 69.954848][ T22] RIP: 0010:kvm_fastop_exception+0xf6a/0x1058 [ 69.954875][ 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 [ 69.954898][ T22] RSP: 0018:ffffc90000dcfae8 EFLAGS: 00010282 [ 69.954921][ T22] RAX: 0000000034736376 RBX: ffff888071874040 RCX: ffff88823bdb8020 [ 69.954939][ T22] RDX: ffffed100e30e80f RSI: 0000000000000004 RDI: 0000000000000007 [ 69.954955][ T22] RBP: 0000000000000004 R08: 0000000000000000 R09: ffff888071874070 [ 69.954971][ T22] R10: ffffed100e30e80e R11: 0000000000000000 R12: ffff88823bdb8020 [ 69.954989][ T22] R13: ffff88823bdb8020 R14: ffff888071874070 R15: dffffc0000000000 [ 69.955026][ T22] ? __d_lookup+0x372/0x720 [ 69.955066][ T22] d_lookup+0xd8/0x170 [ 69.955096][ T22] lookup_dcache+0x1e/0x130 [ 69.955125][ T22] __lookup_hash+0x29/0x180 [ 69.955157][ T22] kern_path_locked+0x17e/0x320 [ 69.955186][ T22] ? filename_lookup+0x80/0x80 [ 69.955237][ T22] handle_remove+0xa2/0x5fe [ 69.955270][ T22] ? cacheinfo_cpu_online.cold+0x3e/0x3e [ 69.955307][ T22] ? lockdep_hardirqs_on_prepare+0x400/0x400 [ 69.955335][ T22] ? finish_task_switch.isra.0+0x232/0xa50 [ 69.955376][ T22] ? find_held_lock+0x2d/0x110 [ 69.955405][ T22] ? devtmpfsd+0xaa/0x2a3 [ 69.955431][ T22] ? lock_downgrade+0x6e0/0x6e0 [ 69.955458][ T22] ? do_raw_spin_lock+0x120/0x2b0 [ 69.955487][ T22] ? rwlock_bug.part.0+0x90/0x90 [ 69.955526][ T22] devtmpfsd+0x1b9/0x2a3 [ 69.955557][ T22] ? dmar_validate_one_drhd+0x24d/0x24d [ 69.955589][ T22] kthread+0x3e5/0x4d0 [ 69.955616][ T22] ? set_kthread_struct+0x130/0x130 [ 69.955649][ T22] ret_from_fork+0x1f/0x30 [ 69.956134][ T22] Kernel Offset: disabled