[ 54.193363][ T6730] entry_SYSCALL_64_after_hwframe+0x44/0xa9 [ 54.199334][ T6730] RIP: 0033:0x7fb513448687 [ 54.203731][ T6730] Code: Bad RIP value. [ 54.207780][ T6730] RSP: 002b:00007ffd57626288 EFLAGS: 00000246 ORIG_RAX: 0000000000000053 [ 54.216168][ T6730] RAX: ffffffffffffffda RBX: 000055fc51134985 RCX: 00007fb513448687 [ 54.224214][ T6730] RDX: 00007ffd57626150 RSI: 00000000000001ed RDI: 000055fc51134985 [ 54.232174][ T6730] RBP: 00007fb513448680 R08: 0000000000000100 R09: 0000000000000000 [ 54.240124][ T6730] R10: 000055fc51134980 R11: 0000000000000246 R12: 00000000000001ed [ 54.248083][ T6730] R13: 00007ffd57626410 R14: 0000000000000000 R15: 0000000000000000 [ OK ] Started Load/Save RF Kill Switch Status. Debian GNU/Linux 9 syzkaller ttyS0 syzkaller login: [ 58.594604][ T21] BUG: using smp_processor_id() in preemptible [00000000] code: kworker/u4:1/21 [ 58.603646][ T21] caller is ext4_mb_new_blocks+0xa4d/0x3b70 [ 58.609654][ T21] CPU: 1 PID: 21 Comm: kworker/u4:1 Not tainted 5.7.0-syzkaller #0 [ 58.617551][ T21] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 58.627596][ T21] Workqueue: writeback wb_workfn (flush-8:0) [ 58.633560][ T21] Call Trace: [ 58.636843][ T21] dump_stack+0x18f/0x20d [ 58.641160][ T21] check_preemption_disabled+0x20d/0x220 [ 58.646776][ T21] ext4_mb_new_blocks+0xa4d/0x3b70 [ 58.651898][ T21] ? ext4_find_extent+0x81a/0xad0 [ 58.656907][ T21] ? ext4_ext_search_right+0x2ca/0xb20 [ 58.662344][ T21] ? ext4_inode_to_goal_block+0x2df/0x3f0 [ 58.668048][ T21] ext4_ext_map_blocks+0x201b/0x33e0 [ 58.673331][ T21] ? ext4_ext_release+0x10/0x10 [ 58.678180][ T21] ? down_write_killable+0x170/0x170 [ 58.683448][ T21] ? ext4_es_lookup_extent+0x41d/0xd10 [ 58.688978][ T21] ext4_map_blocks+0x4cb/0x1640 [ 58.693809][ T21] ? ext4_issue_zeroout+0x1e0/0x1e0 [ 58.698988][ T21] ? rcu_read_lock_sched_held+0x9c/0xd0 [ 58.704531][ T21] ? rcu_read_lock_any_held.part.0+0x50/0x50 [ 58.710496][ T21] ? ext4_alloc_io_end_vec+0x145/0x1c0 [ 58.715936][ T21] ext4_writepages+0x1a7b/0x33c0 [ 58.720872][ T21] ? __ext4_mark_inode_dirty+0x940/0x940 [ 58.726478][ T21] ? __lock_acquire+0x2224/0x48b0 [ 58.731487][ T21] ? lockdep_hardirqs_on_prepare+0x590/0x590 [ 58.737453][ T21] ? lockdep_hardirqs_on_prepare+0x590/0x590 [ 58.743420][ T21] ? __ext4_mark_inode_dirty+0x940/0x940 [ 58.749029][ T21] ? do_writepages+0xfa/0x2a0 [ 58.753692][ T21] do_writepages+0xfa/0x2a0 [ 58.758262][ T21] ? page_writeback_cpu_online+0x10/0x10 [ 58.763893][ T21] ? rcu_read_lock_sched_held+0x9c/0xd0 [ 58.769414][ T21] ? rcu_read_lock_any_held.part.0+0x50/0x50 [ 58.775400][ T21] ? lock_downgrade+0x840/0x840 [ 58.780243][ T21] __writeback_single_inode+0x12a/0x13d0 [ 58.785866][ T21] ? _raw_spin_unlock+0x24/0x40 [ 58.790693][ T21] ? wbc_attach_and_unlock_inode+0x60a/0x9c0 [ 58.796656][ T21] writeback_sb_inodes+0x515/0xdc0 [ 58.801751][ T21] ? __writeback_single_inode+0x13d0/0x13d0 [ 58.807638][ T21] __writeback_inodes_wb+0xc3/0x250 [ 58.813361][ T21] wb_writeback+0x8db/0xd50 [ 58.817867][ T21] ? writeback_inodes_wb.constprop.0+0x1a0/0x1a0 [ 58.824223][ T21] ? _find_next_bit.constprop.0+0x1a3/0x200 [ 58.830111][ T21] ? cpumask_next+0x3c/0x40 [ 58.834637][ T21] ? get_nr_dirty_inodes+0xd6/0x130 [ 58.839817][ T21] wb_workfn+0xab3/0x1090 [ 58.844129][ T21] ? inode_wait_for_writeback+0x30/0x30 [ 58.849847][ T21] ? rcu_read_lock_sched_held+0x9c/0xd0 [ 58.855371][ T21] ? rcu_read_lock_any_held.part.0+0x50/0x50 [ 58.861333][ T21] process_one_work+0x965/0x1690 [ 58.866303][ T21] ? lock_release+0x800/0x800 [ 58.870958][ T21] ? pwq_dec_nr_in_flight+0x310/0x310 [ 58.876311][ T21] ? rwlock_bug.part.0+0x90/0x90 [ 58.881229][ T21] worker_thread+0x96/0xe10 [ 58.885715][ T21] ? process_one_work+0x1690/0x1690 [ 58.890892][ T21] kthread+0x3b5/0x4a0 [ 58.894950][ T21] ? kthread_mod_delayed_work+0x1a0/0x1a0 [ 58.900644][ T21] ? kthread_mod_delayed_work+0x1a0/0x1a0 [ 58.906341][ T21] ret_from_fork+0x1f/0x30 Warning: Permanently added '10.128.0.112' (ECDSA) to the list of known hosts. 2020/06/15 06:39:42 fuzzer started 2020/06/15 06:39:42 connecting to host at 10.128.0.26:45045 2020/06/15 06:39:42 checking machine... 2020/06/15 06:39:42 checking revisions... 2020/06/15 06:39:42 testing simple program... [ 60.215524][ T6802] BUG: using smp_processor_id() in preemptible [00000000] code: syz-fuzzer/6802 [ 60.224894][ T6802] caller is ext4_mb_new_blocks+0xa4d/0x3b70 [ 60.230784][ T6802] CPU: 0 PID: 6802 Comm: syz-fuzzer Not tainted 5.7.0-syzkaller #0 [ 60.238654][ T6802] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 60.248689][ T6802] Call Trace: [ 60.251964][ T6802] dump_stack+0x18f/0x20d [ 60.256290][ T6802] check_preemption_disabled+0x20d/0x220 [ 60.261911][ T6802] ext4_mb_new_blocks+0xa4d/0x3b70 [ 60.267008][ T6802] ? ext4_ext_search_right+0x2ca/0xb20 [ 60.272442][ T6802] ? ext4_inode_to_goal_block+0x2df/0x3f0 [ 60.278145][ T6802] ext4_ext_map_blocks+0x201b/0x33e0 [ 60.283416][ T6802] ? ext4_ext_release+0x10/0x10 [ 60.288252][ T6802] ? down_write_killable+0x170/0x170 [ 60.293524][ T6802] ? ext4_es_lookup_extent+0x41d/0xd10 [ 60.299113][ T6802] ext4_map_blocks+0x4cb/0x1640 [ 60.303970][ T6802] ? ext4_issue_zeroout+0x1e0/0x1e0 [ 60.309152][ T6802] ? rcu_read_lock_sched_held+0x9c/0xd0 [ 60.314686][ T6802] ? rcu_read_lock_any_held.part.0+0x50/0x50 [ 60.321078][ T6802] ? prandom_u32_state+0xe/0x170 [ 60.325996][ T6802] ? __brelse+0x84/0xa0 [ 60.330139][ T6802] ? __ext4_new_inode+0x144/0x55e0 [ 60.335229][ T6802] ext4_getblk+0xad/0x520 [ 60.339538][ T6802] ? ext4_iomap_overwrite_begin+0xa0/0xa0 [ 60.345249][ T6802] ? ext4_free_inode+0x1700/0x1700 [ 60.350345][ T6802] ext4_bread+0x7c/0x380 [ 60.354586][ T6802] ? ext4_getblk+0x520/0x520 [ 60.359155][ T6802] ? dquot_get_next_dqblk+0x180/0x180 [ 60.364516][ T6802] ext4_append+0x153/0x360 [ 60.368912][ T6802] ext4_mkdir+0x5e0/0xdf0 [ 60.373226][ T6802] ? ext4_rmdir+0xde0/0xde0 [ 60.377821][ T6802] ? security_inode_permission+0xc4/0xf0 [ 60.383527][ T6802] vfs_mkdir+0x419/0x690 [ 60.387856][ T6802] do_mkdirat+0x21e/0x280 [ 60.392161][ T6802] ? __ia32_sys_mknod+0xb0/0xb0 [ 60.396991][ T6802] ? do_syscall_64+0x1c/0xe0 [ 60.401556][ T6802] ? lockdep_hardirqs_on_prepare+0x3a2/0x590 [ 60.407512][ T6802] do_syscall_64+0x60/0xe0 [ 60.411919][ T6802] entry_SYSCALL_64_after_hwframe+0x44/0xa9 [ 60.417785][ T6802] RIP: 0033:0x4b02a0 [ 60.421659][ T6802] Code: Bad RIP value. [ 60.425703][ T6802] RSP: 002b:000000c0000e54b8 EFLAGS: 00000212 ORIG_RAX: 0000000000000102 [ 60.434088][ T6802] RAX: ffffffffffffffda RBX: 000000c00002e500 RCX: 00000000004b02a0 [ 60.442034][ T6802] RDX: 00000000000001c0 RSI: 000000c00009f2a0 RDI: ffffffffffffff9c [ 60.449979][ T6802] RBP: 000000c0000e5510 R08: 0000000000000000 R09: 0000000000000000 [ 60.457926][ T6802] R10: 0000000000000000 R11: 0000000000000212 R12: ffffffffffffffff [ 60.465872][ T6802] R13: 0000000000000096 R14: 0000000000000095 R15: 0000000000000100 [ 60.493400][ T6814] BUG: using smp_processor_id() in preemptible [00000000] code: syz-executor.0/6814 [ 60.502869][ T6814] caller is ext4_mb_new_blocks+0xa4d/0x3b70 [ 60.509488][ T6814] CPU: 1 PID: 6814 Comm: syz-executor.0 Not tainted 5.7.0-syzkaller #0 [ 60.517725][ T6814] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 60.527761][ T6814] Call Trace: [ 60.531038][ T6814] dump_stack+0x18f/0x20d [ 60.535374][ T6814] check_preemption_disabled+0x20d/0x220 [ 60.541011][ T6814] ext4_mb_new_blocks+0xa4d/0x3b70 [ 60.546110][ T6814] ? ext4_ext_search_right+0x2ca/0xb20 [ 60.551562][ T6814] ? ext4_inode_to_goal_block+0x2df/0x3f0 [ 60.557263][ T6814] ext4_ext_map_blocks+0x201b/0x33e0 [ 60.562530][ T6814] ? ext4_ext_release+0x10/0x10 [ 60.567380][ T6814] ? down_write_killable+0x170/0x170 [ 60.572639][ T6814] ? ext4_es_lookup_extent+0x41d/0xd10 [ 60.578093][ T6814] ext4_map_blocks+0x4cb/0x1640 [ 60.582936][ T6814] ? ext4_issue_zeroout+0x1e0/0x1e0 [ 60.588180][ T6814] ? rcu_read_lock_sched_held+0x9c/0xd0 [ 60.593969][ T6814] ? rcu_read_lock_any_held.part.0+0x50/0x50 [ 60.599954][ T6814] ? prandom_u32_state+0xe/0x170 [ 60.604878][ T6814] ? __brelse+0x84/0xa0 [ 60.609030][ T6814] ? __ext4_new_inode+0x144/0x55e0 [ 60.614155][ T6814] ext4_getblk+0xad/0x520 [ 60.618488][ T6814] ? ext4_iomap_overwrite_begin+0xa0/0xa0 [ 60.624210][ T6814] ? ext4_free_inode+0x1700/0x1700 [ 60.629315][ T6814] ext4_bread+0x7c/0x380 [ 60.633542][ T6814] ? ext4_getblk+0x520/0x520 [ 60.638159][ T6814] ? dquot_get_next_dqblk+0x180/0x180 [ 60.643519][ T6814] ext4_append+0x153/0x360 [ 60.647925][ T6814] ext4_mkdir+0x5e0/0xdf0 [ 60.652255][ T6814] ? ext4_rmdir+0xde0/0xde0 [ 60.656750][ T6814] ? security_inode_permission+0xc4/0xf0 [ 60.662384][ T6814] vfs_mkdir+0x419/0x690 [ 60.666621][ T6814] do_mkdirat+0x21e/0x280 [ 60.670933][ T6814] ? __ia32_sys_mknod+0xb0/0xb0 [ 60.675778][ T6814] ? do_syscall_64+0x1c/0xe0 [ 60.680363][ T6814] ? lockdep_hardirqs_on_prepare+0x3a2/0x590 [ 60.686441][ T6814] do_syscall_64+0x60/0xe0 [ 60.690870][ T6814] entry_SYSCALL_64_after_hwframe+0x44/0xa9 [ 60.696743][ T6814] RIP: 0033:0x45bee7 [ 60.700611][ T6814] Code: Bad RIP value. [ 60.704652][ T6814] RSP: 002b:00007ffedbd64428 EFLAGS: 00000246 ORIG_RAX: 0000000000000053 [ 60.713045][ T6814] RAX: ffffffffffffffda RBX: 000000000003a2f8 RCX: 000000000045bee7 [ 60.720994][ T6814] RDX: 0000000000000003 RSI: 00000000000001c0 RDI: 00007ffedbd64600 [ 60.728946][ T6814] RBP: 0000000000000001 R08: 000000000000f8c0 R09: 0000000000003640 [ 60.737156][ T6814] R10: 0000000000000011 R11: 0000000000000246 R12: 00000000000000c2 [ 60.745110][ T6814] R13: 00007ffedbd64600 R14: 8421084210842109 R15: 00007ffedbd6460c [ 60.830196][ T6815] IPVS: ftp: loaded support on port[0] = 21 [ 60.867589][ T6815] BUG: using smp_processor_id() in preemptible [00000000] code: syz-executor.0/6815 [ 60.877149][ T6815] caller is ext4_mb_new_blocks+0xa4d/0x3b70 [ 60.883068][ T6815] CPU: 0 PID: 6815 Comm: syz-executor.0 Not tainted 5.7.0-syzkaller #0 [ 60.891282][ T6815] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 60.901663][ T6815] Call Trace: [ 60.904948][ T6815] dump_stack+0x18f/0x20d [ 60.909264][ T6815] check_preemption_disabled+0x20d/0x220 [ 60.914873][ T6815] ext4_mb_new_blocks+0xa4d/0x3b70 [ 60.919967][ T6815] ? ext4_ext_search_right+0x2ca/0xb20 [ 60.925403][ T6815] ? ext4_inode_to_goal_block+0x2df/0x3f0 [ 60.931261][ T6815] ext4_ext_map_blocks+0x201b/0x33e0 [ 60.936558][ T6815] ? ext4_ext_release+0x10/0x10 [ 60.941416][ T6815] ? down_write_killable+0x170/0x170 [ 60.946681][ T6815] ? ext4_es_lookup_extent+0x41d/0xd10 [ 60.952139][ T6815] ext4_map_blocks+0x4cb/0x1640 [ 60.956974][ T6815] ? ext4_issue_zeroout+0x1e0/0x1e0 [ 60.962175][ T6815] ? rcu_read_lock_sched_held+0x9c/0xd0 [ 60.967709][ T6815] ? rcu_read_lock_any_held.part.0+0x50/0x50 [ 60.973662][ T6815] ? prandom_u32_state+0xe/0x170 [ 60.978579][ T6815] ? __brelse+0x84/0xa0 [ 60.982710][ T6815] ? __ext4_new_inode+0x144/0x55e0 [ 60.987799][ T6815] ext4_getblk+0xad/0x520 [ 60.992105][ T6815] ? ext4_iomap_overwrite_begin+0xa0/0xa0 [ 60.997804][ T6815] ? ext4_free_inode+0x1700/0x1700 [ 61.002892][ T6815] ext4_bread+0x7c/0x380 [ 61.007197][ T6815] ? ext4_getblk+0x520/0x520 [ 61.011774][ T6815] ? dquot_get_next_dqblk+0x180/0x180 [ 61.017126][ T6815] ext4_append+0x153/0x360 [ 61.021533][ T6815] ext4_mkdir+0x5e0/0xdf0 [ 61.025844][ T6815] ? ext4_rmdir+0xde0/0xde0 [ 61.030331][ T6815] ? security_inode_permission+0xc4/0xf0 [ 61.035945][ T6815] vfs_mkdir+0x419/0x690 [ 61.040176][ T6815] do_mkdirat+0x21e/0x280 [ 61.044486][ T6815] ? __ia32_sys_mknod+0xb0/0xb0 [ 61.049311][ T6815] ? do_syscall_64+0x1c/0xe0 [ 61.053884][ T6815] ? lockdep_hardirqs_on_prepare+0x3a2/0x590 [ 61.059947][ T6815] do_syscall_64+0x60/0xe0 [ 61.064342][ T6815] entry_SYSCALL_64_after_hwframe+0x44/0xa9 [ 61.070229][ T6815] RIP: 0033:0x45bee7 [ 61.074105][ T6815] Code: Bad RIP value. [ 61.078197][ T6815] RSP: 002b:00007ffedbd64318 EFLAGS: 00000206 ORIG_RAX: 0000000000000053 [ 61.086589][ T6815] RAX: ffffffffffffffda RBX: 000000000078c988 RCX: 000000000045bee7 [ 61.094541][ T6815] RDX: 00007ffedbd64363 RSI: 00000000000001ff RDI: 00007ffedbd64360 [ 61.102498][ T6815] RBP: 00000000000000f8 R08: 0000000000000000 R09: 0000000000000003 [ 61.110464][ T6815] R10: 0000000000000064 R11: 0000000000000206 R12: 00000000004185d0 [ 61.118423][ T6815] R13: 00007ffedbd64350 R14: 0000000000000000 R15: 00007ffedbd64360 [ 61.169967][ T6815] BUG: using smp_processor_id() in preemptible [00000000] code: syz-executor.0/6815 [ 61.179507][ T6815] caller is ext4_mb_new_blocks+0xa4d/0x3b70 [ 61.185490][ T6815] CPU: 1 PID: 6815 Comm: syz-executor.0 Not tainted 5.7.0-syzkaller #0 [ 61.193724][ T6815] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 61.203777][ T6815] Call Trace: [ 61.207081][ T6815] dump_stack+0x18f/0x20d [ 61.211423][ T6815] check_preemption_disabled+0x20d/0x220 [ 61.217074][ T6815] ext4_mb_new_blocks+0xa4d/0x3b70 [ 61.222206][ T6815] ? ext4_ext_search_right+0x2ca/0xb20 [ 61.227669][ T6815] ? ext4_inode_to_goal_block+0x2df/0x3f0 [ 61.233432][ T6815] ext4_ext_map_blocks+0x201b/0x33e0 [ 61.238735][ T6815] ? ext4_ext_release+0x10/0x10 [ 61.243593][ T6815] ? down_write_killable+0x170/0x170 [ 61.248862][ T6815] ? ext4_es_lookup_extent+0x41d/0xd10 [ 61.254305][ T6815] ext4_map_blocks+0x4cb/0x1640 [ 61.259137][ T6815] ? ext4_issue_zeroout+0x1e0/0x1e0 [ 61.264322][ T6815] ? rcu_read_lock_sched_held+0x9c/0xd0 [ 61.270290][ T6815] ? rcu_read_lock_any_held.part.0+0x50/0x50 [ 61.276252][ T6815] ? prandom_u32_state+0xe/0x170 [ 61.281180][ T6815] ? __brelse+0x84/0xa0 [ 61.285329][ T6815] ? __ext4_new_inode+0x144/0x55e0 [ 61.290419][ T6815] ext4_getblk+0xad/0x520 [ 61.294731][ T6815] ? ext4_iomap_overwrite_begin+0xa0/0xa0 [ 61.300438][ T6815] ? ext4_free_inode+0x1700/0x1700 [ 61.305527][ T6815] ext4_bread+0x7c/0x380 [ 61.309755][ T6815] ? ext4_getblk+0x520/0x520 [ 61.314322][ T6815] ? dquot_get_next_dqblk+0x180/0x180 [ 61.319693][ T6815] ext4_append+0x153/0x360 [ 61.324092][ T6815] ext4_mkdir+0x5e0/0xdf0 [ 61.328412][ T6815] ? ext4_rmdir+0xde0/0xde0 [ 61.332904][ T6815] ? security_inode_permission+0xc4/0xf0 [ 61.338523][ T6815] vfs_mkdir+0x419/0x690 [ 61.342756][ T6815] do_mkdirat+0x21e/0x280 [ 61.347071][ T6815] ? __ia32_sys_mknod+0xb0/0xb0 [ 61.351920][ T6815] ? do_syscall_64+0x1c/0xe0 [ 61.356499][ T6815] ? lockdep_hardirqs_on_prepare+0x3a2/0x590 [ 61.362456][ T6815] do_syscall_64+0x60/0xe0 [ 61.366858][ T6815] entry_SYSCALL_64_after_hwframe+0x44/0xa9 [ 61.372725][ T6815] RIP: 0033:0x45bee7 [ 61.376621][ T6815] Code: Bad RIP value. [ 61.380681][ T6815] RSP: 002b:00007ffedbd64318 EFLAGS: 00000206 ORIG_RAX: 0000000000000053 [ 61.389104][ T6815] RAX: ffffffffffffffda RBX: 000000000000eef5 RCX: 000000000045bee7 [ 61.397064][ T6815] RDX: 00007ffedbd64363 RSI: 00000000000001ff RDI: 00007ffedbd64360 [ 61.405030][ T6815] RBP: 0000000000000002 R08: 0000000000000000 R09: 0000000000000003 [ 61.413003][ T6815] R10: 0000000000000064 R11: 0000000000000206 R12: 0000000000000003 2020/06/15 06:39:43 building call list... [ 61.420966][ T6815] R13: 00007ffedbd64350 R14: 000000000000eeea R15: 00007ffedbd64360 [ 61.664212][ T417] tipc: TX() has been purged, node left! [ 62.166606][ T417] ================================================================== [ 62.174837][ T417] BUG: KASAN: use-after-free in afs_wake_up_async_call+0x6aa/0x770 [ 62.182843][ T417] Write of size 1 at addr ffff88809ee0e1e4 by task kworker/u4:5/417 [ 62.190808][ T417] [ 62.193197][ T417] CPU: 0 PID: 417 Comm: kworker/u4:5 Not tainted 5.7.0-syzkaller #0 [ 62.201160][ T417] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 62.211226][ T417] Workqueue: netns cleanup_net [ 62.215978][ T417] Call Trace: [ 62.219369][ T417] dump_stack+0x18f/0x20d [ 62.223696][ T417] ? afs_wake_up_async_call+0x6aa/0x770 [ 62.229257][ T417] ? afs_wake_up_async_call+0x6aa/0x770 [ 62.234796][ T417] ? afs_put_call+0xa40/0xa40 [ 62.239479][ T417] print_address_description.constprop.0.cold+0xd3/0x413 [ 62.246525][ T417] ? vprintk_func+0x97/0x1a6 [ 62.251119][ T417] ? afs_wake_up_async_call+0x6aa/0x770 [ 62.256659][ T417] kasan_report.cold+0x1f/0x37 [ 62.261424][ T417] ? rcu_read_lock_held+0x81/0xb0 [ 62.266555][ T417] ? afs_wake_up_async_call+0x6aa/0x770 [ 62.272100][ T417] afs_wake_up_async_call+0x6aa/0x770 [ 62.277464][ T417] ? afs_close_socket+0x320/0x320 [ 62.282489][ T417] ? afs_put_call+0xa40/0xa40 [ 62.287161][ T417] rxrpc_notify_socket+0x1db/0x5d0 [ 62.292269][ T417] ? afs_put_call+0xa40/0xa40 [ 62.296943][ T417] __rxrpc_set_call_completion.part.0+0x172/0x410 [ 62.303354][ T417] rxrpc_call_completed+0xca/0xf0 [ 62.308377][ T417] rxrpc_discard_prealloc+0x781/0xab0 [ 62.313759][ T417] ? lock_sock_nested+0x94/0x110 [ 62.319309][ T417] rxrpc_listen+0x147/0x360 [ 62.323830][ T417] afs_close_socket+0x95/0x320 [ 62.328593][ T417] ? afs_purge_servers+0x16d/0x300 [ 62.333697][ T417] ? afs_rx_discard_new_call+0x50/0x50 [ 62.339190][ T417] ? init_wait_var_entry+0x200/0x200 [ 62.344647][ T417] ? rcu_read_lock_held_common+0xa0/0xa0 [ 62.350275][ T417] ? check_preemption_disabled+0x38/0x220 [ 62.356012][ T417] afs_net_exit+0x1bc/0x310 [ 62.360511][ T417] ? afs_net_init+0xe30/0xe30 [ 62.365187][ T417] ops_exit_list.isra.0+0xa8/0x150 [ 62.370296][ T417] cleanup_net+0x511/0xa50 [ 62.374712][ T417] ? unregister_pernet_device+0x70/0x70 [ 62.380532][ T417] ? rcu_read_lock_any_held.part.0+0x50/0x50 [ 62.386518][ T417] process_one_work+0x965/0x1690 [ 62.391461][ T417] ? lock_release+0x800/0x800 [ 62.396137][ T417] ? pwq_dec_nr_in_flight+0x310/0x310 [ 62.401510][ T417] ? rwlock_bug.part.0+0x90/0x90 [ 62.406723][ T417] worker_thread+0x96/0xe10 [ 62.411237][ T417] ? process_one_work+0x1690/0x1690 [ 62.416436][ T417] kthread+0x3b5/0x4a0 [ 62.420505][ T417] ? kthread_mod_delayed_work+0x1a0/0x1a0 [ 62.426216][ T417] ? kthread_mod_delayed_work+0x1a0/0x1a0 [ 62.431932][ T417] ret_from_fork+0x1f/0x30 [ 62.436354][ T417] [ 62.438673][ T417] Allocated by task 6815: [ 62.443006][ T417] save_stack+0x1b/0x40 [ 62.447167][ T417] __kasan_kmalloc.constprop.0+0xbf/0xd0 [ 62.452806][ T417] kmem_cache_alloc_trace+0x153/0x7d0 [ 62.458185][ T417] afs_alloc_call+0x55/0x630 [ 62.462770][ T417] afs_charge_preallocation+0xe9/0x2d0 [ 62.468223][ T417] afs_open_socket+0x292/0x360 [ 62.472977][ T417] afs_net_init+0xa6c/0xe30 [ 62.477477][ T417] ops_init+0xaf/0x420 [ 62.481534][ T417] setup_net+0x2de/0x860 [ 62.486636][ T417] copy_net_ns+0x293/0x590 [ 62.491049][ T417] create_new_namespaces+0x3fb/0xb30 [ 62.496329][ T417] unshare_nsproxy_namespaces+0xbd/0x1f0 [ 62.501952][ T417] ksys_unshare+0x43d/0x8e0 [ 62.506447][ T417] __x64_sys_unshare+0x2d/0x40 [ 62.511207][ T417] do_syscall_64+0x60/0xe0 [ 62.515618][ T417] entry_SYSCALL_64_after_hwframe+0x44/0xa9 [ 62.521493][ T417] [ 62.523810][ T417] Freed by task 417: [ 62.527698][ T417] save_stack+0x1b/0x40 [ 62.531846][ T417] __kasan_slab_free+0xf7/0x140 [ 62.536686][ T417] kfree+0x109/0x2b0 [ 62.540573][ T417] afs_put_call+0x585/0xa40 [ 62.545078][ T417] rxrpc_discard_prealloc+0x764/0xab0 [ 62.550444][ T417] rxrpc_listen+0x147/0x360 [ 62.554940][ T417] afs_close_socket+0x95/0x320 [ 62.559711][ T417] afs_net_exit+0x1bc/0x310 [ 62.564204][ T417] ops_exit_list.isra.0+0xa8/0x150 [ 62.569302][ T417] cleanup_net+0x511/0xa50 [ 62.573710][ T417] process_one_work+0x965/0x1690 [ 62.578642][ T417] worker_thread+0x96/0xe10 [ 62.583135][ T417] kthread+0x3b5/0x4a0 [ 62.587212][ T417] ret_from_fork+0x1f/0x30 [ 62.591611][ T417] [ 62.593932][ T417] The buggy address belongs to the object at ffff88809ee0e000 [ 62.593932][ T417] which belongs to the cache kmalloc-1k of size 1024 [ 62.607973][ T417] The buggy address is located 484 bytes inside of [ 62.607973][ T417] 1024-byte region [ffff88809ee0e000, ffff88809ee0e400) [ 62.621318][ T417] The buggy address belongs to the page: [ 62.626943][ T417] page:ffffea00027b8380 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 [ 62.636124][ T417] flags: 0xfffe0000000200(slab) [ 62.640969][ T417] raw: 00fffe0000000200 ffffea00029e4408 ffffea00027ae688 ffff8880aa000c40 [ 62.650156][ T417] raw: 0000000000000000 ffff88809ee0e000 0000000100000002 0000000000000000 [ 62.658724][ T417] page dumped because: kasan: bad access detected [ 62.665124][ T417] [ 62.667441][ T417] Memory state around the buggy address: [ 62.673073][ T417] ffff88809ee0e080: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 62.681171][ T417] ffff88809ee0e100: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 62.689224][ T417] >ffff88809ee0e180: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 62.697277][ T417] ^ [ 62.704463][ T417] ffff88809ee0e200: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 62.712514][ T417] ffff88809ee0e280: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 62.720558][ T417] ================================================================== [ 62.728604][ T417] Disabling lock debugging due to kernel taint [ 62.734801][ T417] Kernel panic - not syncing: panic_on_warn set ... [ 62.741381][ T417] CPU: 0 PID: 417 Comm: kworker/u4:5 Tainted: G B 5.7.0-syzkaller #0 [ 62.750733][ T417] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 62.760790][ T417] Workqueue: netns cleanup_net [ 62.765541][ T417] Call Trace: [ 62.768824][ T417] dump_stack+0x18f/0x20d [ 62.773152][ T417] ? afs_wake_up_async_call+0x5f0/0x770 [ 62.778781][ T417] ? afs_put_call+0xa40/0xa40 [ 62.783463][ T417] panic+0x2e3/0x75c [ 62.787355][ T417] ? __warn_printk+0xf3/0xf3 [ 62.791940][ T417] ? asm_sysvec_apic_timer_interrupt+0x12/0x20 [ 62.798310][ T417] ? trace_hardirqs_on+0x55/0x220 [ 62.803327][ T417] ? afs_wake_up_async_call+0x6aa/0x770 [ 62.808857][ T417] ? afs_wake_up_async_call+0x6aa/0x770 [ 62.814386][ T417] ? afs_put_call+0xa40/0xa40 [ 62.819048][ T417] end_report+0x4d/0x53 [ 62.823206][ T417] kasan_report.cold+0xd/0x37 [ 62.827869][ T417] ? rcu_read_lock_held+0x81/0xb0 [ 62.832874][ T417] ? afs_wake_up_async_call+0x6aa/0x770 [ 62.838487][ T417] afs_wake_up_async_call+0x6aa/0x770 [ 62.843844][ T417] ? afs_close_socket+0x320/0x320 [ 62.848854][ T417] ? afs_put_call+0xa40/0xa40 [ 62.853524][ T417] rxrpc_notify_socket+0x1db/0x5d0 [ 62.858628][ T417] ? afs_put_call+0xa40/0xa40 [ 62.863293][ T417] __rxrpc_set_call_completion.part.0+0x172/0x410 [ 62.869702][ T417] rxrpc_call_completed+0xca/0xf0 [ 62.874722][ T417] rxrpc_discard_prealloc+0x781/0xab0 [ 62.880267][ T417] ? lock_sock_nested+0x94/0x110 [ 62.885199][ T417] rxrpc_listen+0x147/0x360 [ 62.889687][ T417] afs_close_socket+0x95/0x320 [ 62.894444][ T417] ? afs_purge_servers+0x16d/0x300 [ 62.899555][ T417] ? afs_rx_discard_new_call+0x50/0x50 [ 62.905026][ T417] ? init_wait_var_entry+0x200/0x200 [ 62.910288][ T417] ? rcu_read_lock_held_common+0xa0/0xa0 [ 62.915900][ T417] ? check_preemption_disabled+0x38/0x220 [ 62.921604][ T417] afs_net_exit+0x1bc/0x310 [ 62.926114][ T417] ? afs_net_init+0xe30/0xe30 [ 62.930776][ T417] ops_exit_list.isra.0+0xa8/0x150 [ 62.935973][ T417] cleanup_net+0x511/0xa50 [ 62.940372][ T417] ? unregister_pernet_device+0x70/0x70 [ 62.945924][ T417] ? rcu_read_lock_any_held.part.0+0x50/0x50 [ 62.951935][ T417] process_one_work+0x965/0x1690 [ 62.956875][ T417] ? lock_release+0x800/0x800 [ 62.961631][ T417] ? pwq_dec_nr_in_flight+0x310/0x310 [ 62.967243][ T417] ? rwlock_bug.part.0+0x90/0x90 [ 62.972274][ T417] worker_thread+0x96/0xe10 [ 62.976770][ T417] ? process_one_work+0x1690/0x1690 [ 62.981996][ T417] kthread+0x3b5/0x4a0 [ 62.986075][ T417] ? kthread_mod_delayed_work+0x1a0/0x1a0 [ 62.991775][ T417] ? kthread_mod_delayed_work+0x1a0/0x1a0 [ 62.997468][ T417] ret_from_fork+0x1f/0x30 [ 63.003350][ T417] Kernel Offset: disabled [ 63.007707][ T417] Rebooting in 86400 seconds..