Warning: Permanently added '10.128.0.240' (ECDSA) to the list of known hosts. executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program syzkaller login: [ 144.801769][ T22] ================================================================== [ 144.809859][ T22] BUG: KFENCE: use-after-free read in kvm_fastop_exception+0xf6a/0x1058 [ 144.809859][ T22] [ 144.820385][ T22] Use-after-free read at 0xffff88823bdb0020 (in kfence-#215): [ 144.827835][ T22] kvm_fastop_exception+0xf6a/0x1058 [ 144.833121][ T22] d_lookup+0xd8/0x170 [ 144.837186][ T22] lookup_dcache+0x1e/0x130 [ 144.841685][ T22] __lookup_hash+0x29/0x180 [ 144.846179][ T22] kern_path_locked+0x17e/0x320 [ 144.851026][ T22] handle_remove+0xa2/0x5fe [ 144.855528][ T22] devtmpfsd+0x1b9/0x2a3 [ 144.859764][ T22] kthread+0x3e5/0x4d0 [ 144.863827][ T22] ret_from_fork+0x1f/0x30 [ 144.868264][ T22] [ 144.870573][ T22] kfence-#215: 0xffff88823bdb0000-0xffff88823bdb0fff, size=4096, cache=names_cache [ 144.870573][ T22] [ 144.882015][ T22] allocated by task 22 on cpu 0 at 144.801543s: [ 144.888260][ T22] getname_kernel+0x4e/0x370 [ 144.892859][ T22] kern_path_locked+0x71/0x320 [ 144.897619][ T22] handle_remove+0xa2/0x5fe [ 144.902115][ T22] devtmpfsd+0x1b9/0x2a3 [ 144.906350][ T22] kthread+0x3e5/0x4d0 [ 144.910413][ T22] ret_from_fork+0x1f/0x30 [ 144.914819][ T22] [ 144.917126][ T22] freed by task 22 on cpu 0 at 144.801573s: [ 144.923041][ T22] putname.part.0+0xe1/0x120 [ 144.927629][ T22] kern_path_locked+0xc2/0x320 [ 144.932388][ T22] handle_remove+0xa2/0x5fe [ 144.936885][ T22] devtmpfsd+0x1b9/0x2a3 [ 144.941127][ T22] kthread+0x3e5/0x4d0 [ 144.945203][ T22] ret_from_fork+0x1f/0x30 [ 144.949623][ T22] [ 144.951933][ T22] CPU: 0 PID: 22 Comm: kdevtmpfs Not tainted 5.14.0-syzkaller #0 [ 144.960162][ T22] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 144.970212][ T22] RIP: 0010:kvm_fastop_exception+0xf6a/0x1058 [ 144.976288][ T22] Code: d3 ed e9 bf d9 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 e7 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 f1 6e f8 bd [ 144.995884][ T22] RSP: 0018:ffffc90000dcfae8 EFLAGS: 00010282 [ 145.001963][ T22] RAX: 00000030706f6f6c RBX: ffff88806c5f51e0 RCX: ffff88823bdb0020 [ 145.009925][ T22] RDX: ffffed100d8bea43 RSI: 0000000000000005 RDI: 0000000000000007 [ 145.017899][ T22] RBP: 0000000000000005 R08: 0000000000000000 R09: ffff88806c5f5210 [ 145.025858][ T22] R10: ffffed100d8bea42 R11: 0000000000000000 R12: ffff88823bdb0020 [ 145.033818][ T22] R13: ffff88823bdb0020 R14: ffff88806c5f5210 R15: dffffc0000000000 [ 145.041778][ T22] FS: 0000000000000000(0000) GS:ffff8880b9c00000(0000) knlGS:0000000000000000 [ 145.050699][ T22] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 [ 145.057276][ T22] CR2: ffff88823bdb0020 CR3: 000000007787b000 CR4: 00000000001506f0 [ 145.065241][ T22] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 [ 145.073204][ T22] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 [ 145.081169][ T22] Call Trace: [ 145.084453][ T22] d_lookup+0xd8/0x170 [ 145.088521][ T22] lookup_dcache+0x1e/0x130 [ 145.093029][ T22] __lookup_hash+0x29/0x180 [ 145.097525][ T22] kern_path_locked+0x17e/0x320 [ 145.102396][ T22] ? filename_lookup+0x80/0x80 [ 145.107185][ T22] handle_remove+0xa2/0x5fe [ 145.111703][ T22] ? cacheinfo_cpu_online.cold+0x3e/0x3e [ 145.117338][ T22] ? lockdep_hardirqs_on_prepare+0x400/0x400 [ 145.123320][ T22] ? finish_task_switch.isra.0+0x232/0xa50 [ 145.129190][ T22] ? find_held_lock+0x2d/0x110 [ 145.133983][ T22] ? devtmpfsd+0xaa/0x2a3 [ 145.138321][ T22] ? lock_downgrade+0x6e0/0x6e0 [ 145.143195][ T22] ? do_raw_spin_lock+0x120/0x2b0 [ 145.148221][ T22] ? rwlock_bug.part.0+0x90/0x90 [ 145.153164][ T22] devtmpfsd+0x1b9/0x2a3 [ 145.157401][ T22] ? dmar_validate_one_drhd+0x24d/0x24d [ 145.162940][ T22] kthread+0x3e5/0x4d0 [ 145.167014][ T22] ? set_kthread_struct+0x130/0x130 [ 145.172207][ T22] ret_from_fork+0x1f/0x30 [ 145.176657][ T22] ================================================================== [ 145.184701][ T22] Kernel panic - not syncing: panic_on_warn set ... [ 145.191769][ T22] CPU: 0 PID: 22 Comm: kdevtmpfs Not tainted 5.14.0-syzkaller #0 [ 145.199498][ T22] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 145.209559][ T22] Call Trace: [ 145.212841][ T22] dump_stack_lvl+0xcd/0x134 [ 145.217431][ T22] panic+0x2b0/0x6dd [ 145.221325][ T22] ? __warn_printk+0xf3/0xf3 [ 145.225920][ T22] ? kfence_report_error.cold+0x2f3/0xa56 [ 145.231650][ T22] kfence_report_error.cold+0x304/0xa56 [ 145.237209][ T22] ? kvm_fastop_exception+0xf6a/0x1058 [ 145.242684][ T22] ? kfence_print_object+0x2e0/0x2e0 [ 145.247977][ T22] ? add_lock_to_list.constprop.0+0x185/0x370 [ 145.254046][ T22] ? kvm_fastop_exception+0xf6a/0x1058 [ 145.259520][ T22] ? d_lookup+0xd8/0x170 [ 145.263764][ T22] ? lookup_dcache+0x1e/0x130 [ 145.268436][ T22] ? __lookup_hash+0x29/0x180 [ 145.273109][ T22] ? kern_path_locked+0x17e/0x320 [ 145.278145][ T22] ? handle_remove+0xa2/0x5fe [ 145.282833][ T22] ? devtmpfsd+0x1b9/0x2a3 [ 145.287681][ T22] ? kthread+0x3e5/0x4d0 [ 145.291924][ T22] ? ret_from_fork+0x1f/0x30 [ 145.296694][ T22] ? mark_lock+0xef/0x17b0 [ 145.301142][ T22] kfence_handle_page_fault+0x203/0x630 [ 145.306711][ T22] page_fault_oops+0x1c5/0x6b0 [ 145.311503][ T22] ? __sanitizer_cov_trace_const_cmp2+0x22/0x80 [ 145.317747][ T22] ? is_prefetch.constprop.0+0xb7/0x530 [ 145.323296][ T22] ? dump_pagetable+0xc0/0xc0 [ 145.327974][ T22] ? pgtable_bad+0x90/0x90 [ 145.332389][ T22] ? search_bpf_extables+0x1d1/0x2f0 [ 145.338118][ T22] ? kvm_fastop_exception+0xf6a/0x1058 [ 145.343580][ T22] kernelmode_fixup_or_oops+0x219/0x280 [ 145.349161][ T22] __bad_area_nosemaphore+0x36d/0x400 [ 145.354533][ T22] ? spurious_kernel_fault+0x38d/0x5b0 [ 145.359995][ T22] do_kern_addr_fault+0x5b/0x70 [ 145.364848][ T22] exc_page_fault+0x155/0x180 [ 145.369525][ T22] asm_exc_page_fault+0x1e/0x30 [ 145.374374][ T22] RIP: 0010:kvm_fastop_exception+0xf6a/0x1058 [ 145.380438][ T22] Code: d3 ed e9 bf d9 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 e7 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 f1 6e f8 bd [ 145.400385][ T22] RSP: 0018:ffffc90000dcfae8 EFLAGS: 00010282 [ 145.406448][ T22] RAX: 00000030706f6f6c RBX: ffff88806c5f51e0 RCX: ffff88823bdb0020 [ 145.414412][ T22] RDX: ffffed100d8bea43 RSI: 0000000000000005 RDI: 0000000000000007 [ 145.422375][ T22] RBP: 0000000000000005 R08: 0000000000000000 R09: ffff88806c5f5210 [ 145.430343][ T22] R10: ffffed100d8bea42 R11: 0000000000000000 R12: ffff88823bdb0020 [ 145.438306][ T22] R13: ffff88823bdb0020 R14: ffff88806c5f5210 R15: dffffc0000000000 [ 145.446290][ T22] ? __d_lookup+0x372/0x720 [ 145.451151][ T22] d_lookup+0xd8/0x170 [ 145.455223][ T22] lookup_dcache+0x1e/0x130 [ 145.459730][ T22] __lookup_hash+0x29/0x180 [ 145.464235][ T22] kern_path_locked+0x17e/0x320 [ 145.469088][ T22] ? filename_lookup+0x80/0x80 [ 145.473865][ T22] handle_remove+0xa2/0x5fe [ 145.478374][ T22] ? cacheinfo_cpu_online.cold+0x3e/0x3e [ 145.484104][ T22] ? lockdep_hardirqs_on_prepare+0x400/0x400 [ 145.490084][ T22] ? finish_task_switch.isra.0+0x232/0xa50 [ 145.495898][ T22] ? find_held_lock+0x2d/0x110 [ 145.500666][ T22] ? devtmpfsd+0xaa/0x2a3 [ 145.504992][ T22] ? lock_downgrade+0x6e0/0x6e0 [ 145.509841][ T22] ? do_raw_spin_lock+0x120/0x2b0 [ 145.514872][ T22] ? rwlock_bug.part.0+0x90/0x90 [ 145.519816][ T22] devtmpfsd+0x1b9/0x2a3 [ 145.524059][ T22] ? dmar_validate_one_drhd+0x24d/0x24d [ 145.529614][ T22] kthread+0x3e5/0x4d0 [ 145.533680][ T22] ? set_kthread_struct+0x130/0x130 [ 145.538880][ T22] ret_from_fork+0x1f/0x30 [ 145.543678][ T22] Kernel Offset: disabled [ 145.548416][ T22] Rebooting in 86400 seconds..