[ 48.949113][ T6721] RDX: 00007ffc72990f90 RSI: 00000000000001ed RDI: 000055ea7b5bb985 [ 48.957083][ T6721] RBP: 00007f125a10f680 R08: 0000000000000100 R09: 0000000000000000 [ 48.965057][ T6721] R10: 000055ea7b5bb980 R11: 0000000000000246 R12: 00000000000001ed [ 48.973030][ T6721] R13: 00007ffc72991250 R14: 0000000000000000 R15: 0000000000000000 [ OK ] Started Load/Save RF Kill Switch Status. Debian GNU/Linux 9 syzkaller ttyS0 Warning: Permanently added '10.128.1.42' (ECDSA) to the list of known hosts. 2020/06/12 01:28:10 fuzzer started 2020/06/12 01:28:11 connecting to host at 10.128.0.26:41015 2020/06/12 01:28:11 checking machine... 2020/06/12 01:28:11 checking revisions... 2020/06/12 01:28:11 testing simple program... syzkaller login: [ 58.109587][ T6787] BUG: using smp_processor_id() in preemptible [00000000] code: syz-fuzzer/6787 [ 58.118795][ T6787] caller is ext4_mb_new_blocks+0xa77/0x3b30 [ 58.124716][ T6787] CPU: 1 PID: 6787 Comm: syz-fuzzer Not tainted 5.7.0-syzkaller #0 [ 58.132579][ T6787] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 58.142612][ T6787] Call Trace: [ 58.145887][ T6787] dump_stack+0x188/0x20d [ 58.150197][ T6787] debug_smp_processor_id.cold+0x88/0x9b [ 58.155807][ T6787] ext4_mb_new_blocks+0xa77/0x3b30 [ 58.160900][ T6787] ? ext4_ext_search_right+0x2ca/0xb20 [ 58.166370][ T6787] ? ext4_inode_to_goal_block+0x2df/0x3f0 [ 58.172095][ T6787] ext4_ext_map_blocks+0x2044/0x3410 [ 58.177360][ T6787] ? ext4_ext_release+0x10/0x10 [ 58.182195][ T6787] ? __down_timeout+0x2d0/0x2d0 [ 58.187019][ T6787] ? ext4_es_lookup_extent+0x41d/0xd30 [ 58.192457][ T6787] ext4_map_blocks+0x4cb/0x1640 [ 58.197298][ T6787] ? ext4_issue_zeroout+0x1e0/0x1e0 [ 58.202482][ T6787] ? rcu_read_lock_sched_held+0x9c/0xd0 [ 58.208012][ T6787] ? rcu_read_lock_any_held.part.0+0x50/0x50 [ 58.213964][ T6787] ? prandom_u32_state+0xe/0x170 [ 58.218890][ T6787] ? __brelse+0x84/0xa0 [ 58.223019][ T6787] ? __ext4_new_inode+0x144/0x57c0 [ 58.228107][ T6787] ext4_getblk+0xad/0x520 [ 58.232414][ T6787] ? ext4_iomap_overwrite_begin+0xa0/0xa0 [ 58.238111][ T6787] ? ext4_free_inode+0x17e0/0x17e0 [ 58.243209][ T6787] ext4_bread+0x7c/0x380 [ 58.247425][ T6787] ? ext4_getblk+0x520/0x520 [ 58.251995][ T6787] ? dqget+0xff0/0xff0 [ 58.256045][ T6787] ext4_append+0x153/0x360 [ 58.260542][ T6787] ext4_mkdir+0x5e0/0xdf0 [ 58.271368][ T6787] ? ext4_rmdir+0xde0/0xde0 [ 58.275850][ T6787] ? security_inode_permission+0xc4/0xf0 [ 58.281464][ T6787] vfs_mkdir+0x419/0x690 [ 58.285692][ T6787] do_mkdirat+0x21e/0x280 [ 58.290011][ T6787] ? __ia32_sys_mknod+0xb0/0xb0 [ 58.294848][ T6787] ? lockdep_hardirqs_on_prepare+0x3a2/0x590 [ 58.300804][ T6787] ? do_syscall_64+0x21/0x7d0 [ 58.305470][ T6787] ? lockdep_hardirqs_on_prepare+0x3a2/0x590 [ 58.311427][ T6787] do_syscall_64+0xf6/0x7d0 [ 58.315920][ T6787] entry_SYSCALL_64_after_hwframe+0x49/0xb3 [ 58.321796][ T6787] RIP: 0033:0x4b02a0 [ 58.325663][ T6787] Code: 8b 7c 24 10 48 8b 74 24 18 48 8b 54 24 20 49 c7 c2 00 00 00 00 49 c7 c0 00 00 00 00 49 c7 c1 00 00 00 00 48 8b 44 24 08 0f 05 <48> 3d 01 f0 ff ff 76 20 48 c7 44 24 28 ff ff ff ff 48 c7 44 24 30 [ 58.345253][ T6787] RSP: 002b:000000c0000d94b8 EFLAGS: 00000212 ORIG_RAX: 0000000000000102 [ 58.353648][ T6787] RAX: ffffffffffffffda RBX: 000000c00002e500 RCX: 00000000004b02a0 [ 58.361592][ T6787] RDX: 00000000000001c0 RSI: 000000c00009c760 RDI: ffffffffffffff9c [ 58.369540][ T6787] RBP: 000000c0000d9510 R08: 0000000000000000 R09: 0000000000000000 [ 58.377495][ T6787] R10: 0000000000000000 R11: 0000000000000212 R12: ffffffffffffffff [ 58.385450][ T6787] R13: 000000000000003c R14: 000000000000003b R15: 0000000000000100 [ 58.402179][ T6803] BUG: using smp_processor_id() in preemptible [00000000] code: syz-executor.0/6803 [ 58.404365][ T1159] BUG: using smp_processor_id() in preemptible [00000000] code: khugepaged/1159 [ 58.411621][ T6803] caller is ext4_mb_new_blocks+0xa77/0x3b30 [ 58.411640][ T6803] CPU: 1 PID: 6803 Comm: syz-executor.0 Not tainted 5.7.0-syzkaller #0 [ 58.420744][ T1159] caller is ext4_mb_new_blocks+0xa77/0x3b30 [ 58.426582][ T6803] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 58.450673][ T6803] Call Trace: [ 58.453952][ T6803] dump_stack+0x188/0x20d [ 58.458268][ T6803] debug_smp_processor_id.cold+0x88/0x9b [ 58.463881][ T6803] ext4_mb_new_blocks+0xa77/0x3b30 [ 58.468982][ T6803] ? ext4_ext_search_right+0x2ca/0xb20 [ 58.474421][ T6803] ? ext4_inode_to_goal_block+0x2df/0x3f0 [ 58.480127][ T6803] ext4_ext_map_blocks+0x2044/0x3410 [ 58.485396][ T6803] ? ext4_ext_release+0x10/0x10 [ 58.490237][ T6803] ? __down_timeout+0x2d0/0x2d0 [ 58.495065][ T6803] ? ext4_es_lookup_extent+0x41d/0xd30 [ 58.500509][ T6803] ext4_map_blocks+0x4cb/0x1640 [ 58.505358][ T6803] ? ext4_issue_zeroout+0x1e0/0x1e0 [ 58.510538][ T6803] ? rcu_read_lock_sched_held+0x9c/0xd0 [ 58.516079][ T6803] ? rcu_read_lock_any_held.part.0+0x50/0x50 [ 58.522058][ T6803] ? prandom_u32_state+0xe/0x170 [ 58.526983][ T6803] ? __brelse+0x84/0xa0 [ 58.531128][ T6803] ? __ext4_new_inode+0x144/0x57c0 [ 58.536221][ T6803] ext4_getblk+0xad/0x520 [ 58.540534][ T6803] ? ext4_iomap_overwrite_begin+0xa0/0xa0 [ 58.546238][ T6803] ? ext4_free_inode+0x17e0/0x17e0 [ 58.551331][ T6803] ext4_bread+0x7c/0x380 [ 58.555569][ T6803] ? ext4_getblk+0x520/0x520 [ 58.560147][ T6803] ? dqget+0xff0/0xff0 [ 58.564199][ T6803] ext4_append+0x153/0x360 [ 58.568600][ T6803] ext4_mkdir+0x5e0/0xdf0 [ 58.572928][ T6803] ? ext4_rmdir+0xde0/0xde0 [ 58.577427][ T6803] ? security_inode_permission+0xc4/0xf0 [ 58.583060][ T6803] vfs_mkdir+0x419/0x690 [ 58.587284][ T6803] do_mkdirat+0x21e/0x280 [ 58.591608][ T6803] ? __ia32_sys_mknod+0xb0/0xb0 [ 58.596438][ T6803] ? lockdep_hardirqs_on_prepare+0x3a2/0x590 [ 58.602401][ T6803] ? do_syscall_64+0x21/0x7d0 [ 58.607062][ T6803] ? lockdep_hardirqs_on_prepare+0x3a2/0x590 [ 58.613024][ T6803] do_syscall_64+0xf6/0x7d0 [ 58.617524][ T6803] entry_SYSCALL_64_after_hwframe+0x49/0xb3 [ 58.623406][ T6803] RIP: 0033:0x45bee7 [ 58.627284][ T6803] Code: 1f 40 00 b8 5a 00 00 00 0f 05 48 3d 01 f0 ff ff 0f 83 7d c2 fb ff c3 66 2e 0f 1f 84 00 00 00 00 00 66 90 b8 53 00 00 00 0f 05 <48> 3d 01 f0 ff ff 0f 83 5d c2 fb ff c3 66 2e 0f 1f 84 00 00 00 00 [ 58.646877][ T6803] RSP: 002b:00007ffc3e637388 EFLAGS: 00000246 ORIG_RAX: 0000000000000053 [ 58.655280][ T6803] RAX: ffffffffffffffda RBX: 000000000003a2f8 RCX: 000000000045bee7 [ 58.663232][ T6803] RDX: 0000000000000003 RSI: 00000000000001c0 RDI: 00007ffc3e637560 [ 58.671188][ T6803] RBP: 0000000000000001 R08: 000000000000f8c0 R09: 00000000000031c0 [ 58.679140][ T6803] R10: 0000000000000011 R11: 0000000000000246 R12: 00000000000000c2 [ 58.687094][ T6803] R13: 00007ffc3e637560 R14: 8421084210842109 R15: 00007ffc3e63756c [ 58.695078][ T1159] CPU: 0 PID: 1159 Comm: khugepaged Not tainted 5.7.0-syzkaller #0 [ 58.702983][ T1159] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 58.713044][ T1159] Call Trace: [ 58.716343][ T1159] dump_stack+0x188/0x20d [ 58.720679][ T1159] debug_smp_processor_id.cold+0x88/0x9b [ 58.726318][ T1159] ext4_mb_new_blocks+0xa77/0x3b30 [ 58.731433][ T1159] ? __kmalloc+0x62f/0x7a0 [ 58.735886][ T1159] ? ext4_ext_search_right+0x2ca/0xb20 [ 58.741348][ T1159] ? ext4_inode_to_goal_block+0x2df/0x3f0 [ 58.747078][ T1159] ext4_ext_map_blocks+0x2044/0x3410 [ 58.752392][ T1159] ? ext4_ext_release+0x10/0x10 [ 58.757260][ T1159] ? __down_timeout+0x2d0/0x2d0 [ 58.762116][ T1159] ? ext4_es_lookup_extent+0x41d/0xd30 [ 58.767579][ T1159] ext4_map_blocks+0x4cb/0x1640 [ 58.772437][ T1159] ? ext4_issue_zeroout+0x1e0/0x1e0 [ 58.777635][ T1159] ? debug_smp_processor_id+0x2f/0x185 [ 58.783102][ T1159] ? rcu_read_lock_sched_held+0x9c/0xd0 [ 58.788651][ T1159] ? rcu_read_lock_any_held.part.0+0x50/0x50 [ 58.794632][ T1159] ? ext4_alloc_io_end_vec+0x145/0x1c0 [ 58.800097][ T1159] ext4_writepages+0x1ab7/0x3400 [ 58.805041][ T1159] ? mark_lock+0x30/0xdd0 [ 58.809383][ T1159] ? __ext4_mark_inode_dirty+0x950/0x950 [ 58.815053][ T1159] ? __ext4_mark_inode_dirty+0x950/0x950 [ 58.820689][ T1159] ? do_writepages+0xfa/0x2a0 [ 58.825371][ T1159] do_writepages+0xfa/0x2a0 [ 58.826607][ T6804] IPVS: ftp: loaded support on port[0] = 21 [ 58.829875][ T1159] ? page_writeback_cpu_online+0x10/0x10 [ 58.829890][ T1159] ? do_raw_spin_lock+0x129/0x2e0 [ 58.829902][ T1159] ? do_raw_spin_unlock+0x171/0x260 [ 58.829916][ T1159] ? _raw_spin_unlock+0x24/0x40 [ 58.829941][ T1159] __filemap_fdatawrite_range+0x2aa/0x390 [ 58.862176][ T1159] ? collapse_file+0x3575/0x4300 [ 58.867117][ T1159] ? delete_from_page_cache_batch+0xec0/0xec0 [ 58.873199][ T1159] ? _raw_spin_unlock_irq+0x1f/0x80 [ 58.878400][ T1159] ? lockdep_hardirqs_on_prepare+0x3a2/0x590 [ 58.880734][ T6804] BUG: using smp_processor_id() in preemptible [00000000] code: syz-executor.0/6804 [ 58.884406][ T1159] collapse_file+0x357f/0x4300 [ 58.893818][ T6804] caller is ext4_mb_new_blocks+0xa77/0x3b30 [ 58.898511][ T1159] ? collapse_huge_page+0x4370/0x4370 [ 58.898524][ T1159] ? khugepaged+0x24fa/0x3f80 [ 58.898556][ T1159] khugepaged+0x3049/0x3f80 [ 58.898595][ T1159] ? collapse_pte_mapped_thp+0xbf0/0xbf0 [ 58.924539][ T1159] ? lock_downgrade+0x840/0x840 [ 58.929383][ T1159] ? finish_wait+0x260/0x260 [ 58.933966][ T1159] ? _raw_spin_unlock_irqrestore+0x62/0xe0 [ 58.939755][ T1159] ? lockdep_hardirqs_on_prepare+0x3a2/0x590 [ 58.945733][ T1159] ? __kthread_parkme+0x13f/0x1e0 [ 58.950738][ T1159] ? collapse_pte_mapped_thp+0xbf0/0xbf0 [ 58.956363][ T1159] kthread+0x388/0x470 [ 58.960552][ T1159] ? kthread_mod_delayed_work+0x1a0/0x1a0 [ 58.966267][ T1159] ? kthread_mod_delayed_work+0x1a0/0x1a0 [ 58.971991][ T1159] ret_from_fork+0x24/0x30 [ 58.976409][ T6804] CPU: 1 PID: 6804 Comm: syz-executor.0 Not tainted 5.7.0-syzkaller #0 [ 58.984648][ T6804] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 58.994718][ T6804] Call Trace: [ 58.998019][ T6804] dump_stack+0x188/0x20d [ 59.002350][ T6804] debug_smp_processor_id.cold+0x88/0x9b [ 59.007993][ T6804] ext4_mb_new_blocks+0xa77/0x3b30 [ 59.013106][ T6804] ? ext4_ext_search_right+0x2ca/0xb20 [ 59.018585][ T6804] ? ext4_inode_to_goal_block+0x2df/0x3f0 [ 59.024283][ T6804] ext4_ext_map_blocks+0x2044/0x3410 [ 59.029576][ T6804] ? ext4_ext_release+0x10/0x10 [ 59.034412][ T6804] ? __down_timeout+0x2d0/0x2d0 [ 59.039235][ T6804] ? ext4_es_lookup_extent+0x41d/0xd30 [ 59.044671][ T6804] ext4_map_blocks+0x4cb/0x1640 [ 59.049500][ T6804] ? ext4_issue_zeroout+0x1e0/0x1e0 [ 59.054671][ T6804] ? rcu_read_lock_sched_held+0x9c/0xd0 [ 59.060209][ T6804] ? rcu_read_lock_any_held.part.0+0x50/0x50 [ 59.066163][ T6804] ? prandom_u32_state+0xe/0x170 [ 59.071080][ T6804] ? __brelse+0x84/0xa0 [ 59.075209][ T6804] ? __ext4_new_inode+0x144/0x57c0 [ 59.080307][ T6804] ext4_getblk+0xad/0x520 [ 59.084614][ T6804] ? ext4_iomap_overwrite_begin+0xa0/0xa0 [ 59.090322][ T6804] ? ext4_free_inode+0x17e0/0x17e0 [ 59.095410][ T6804] ext4_bread+0x7c/0x380 [ 59.099626][ T6804] ? ext4_getblk+0x520/0x520 [ 59.104203][ T6804] ? dqget+0xff0/0xff0 [ 59.108252][ T6804] ext4_append+0x153/0x360 [ 59.112644][ T6804] ext4_mkdir+0x5e0/0xdf0 [ 59.116950][ T6804] ? ext4_rmdir+0xde0/0xde0 [ 59.121440][ T6804] ? security_inode_permission+0xc4/0xf0 [ 59.127089][ T6804] vfs_mkdir+0x419/0x690 [ 59.131326][ T6804] do_mkdirat+0x21e/0x280 [ 59.135642][ T6804] ? __ia32_sys_mknod+0xb0/0xb0 [ 59.140473][ T6804] ? lockdep_hardirqs_on_prepare+0x3a2/0x590 [ 59.146440][ T6804] ? do_syscall_64+0x21/0x7d0 [ 59.151109][ T6804] ? lockdep_hardirqs_on_prepare+0x3a2/0x590 [ 59.157065][ T6804] do_syscall_64+0xf6/0x7d0 [ 59.161546][ T6804] entry_SYSCALL_64_after_hwframe+0x49/0xb3 [ 59.167412][ T6804] RIP: 0033:0x45bee7 [ 59.171293][ T6804] Code: 1f 40 00 b8 5a 00 00 00 0f 05 48 3d 01 f0 ff ff 0f 83 7d c2 fb ff c3 66 2e 0f 1f 84 00 00 00 00 00 66 90 b8 53 00 00 00 0f 05 <48> 3d 01 f0 ff ff 0f 83 5d c2 fb ff c3 66 2e 0f 1f 84 00 00 00 00 [ 59.190880][ T6804] RSP: 002b:00007ffc3e637278 EFLAGS: 00000206 ORIG_RAX: 0000000000000053 [ 59.199291][ T6804] RAX: ffffffffffffffda RBX: 000000000078c988 RCX: 000000000045bee7 [ 59.207246][ T6804] RDX: 00007ffc3e6372c3 RSI: 00000000000001ff RDI: 00007ffc3e6372c0 [ 59.215606][ T6804] RBP: 00000000000000f8 R08: 0000000000000000 R09: 0000000000000003 [ 59.223731][ T6804] R10: 0000000000000064 R11: 0000000000000206 R12: 00000000004185d0 [ 59.231690][ T6804] R13: 00007ffc3e6372b0 R14: 0000000000000000 R15: 00007ffc3e6372c0 [ 59.284001][ T6804] BUG: using smp_processor_id() in preemptible [00000000] code: syz-executor.0/6804 [ 59.293569][ T6804] caller is ext4_mb_new_blocks+0xa77/0x3b30 [ 59.299592][ T6804] CPU: 1 PID: 6804 Comm: syz-executor.0 Not tainted 5.7.0-syzkaller #0 [ 59.307835][ T6804] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 59.317895][ T6804] Call Trace: [ 59.321199][ T6804] dump_stack+0x188/0x20d [ 59.325549][ T6804] debug_smp_processor_id.cold+0x88/0x9b [ 59.331245][ T6804] ext4_mb_new_blocks+0xa77/0x3b30 [ 59.336368][ T6804] ? ext4_ext_search_right+0x2ca/0xb20 [ 59.341831][ T6804] ? ext4_inode_to_goal_block+0x2df/0x3f0 [ 59.347558][ T6804] ext4_ext_map_blocks+0x2044/0x3410 [ 59.352853][ T6804] ? ext4_ext_release+0x10/0x10 [ 59.357722][ T6804] ? __down_timeout+0x2d0/0x2d0 [ 59.362576][ T6804] ? ext4_es_lookup_extent+0x41d/0xd30 [ 59.368101][ T6804] ext4_map_blocks+0x4cb/0x1640 [ 59.372959][ T6804] ? ext4_issue_zeroout+0x1e0/0x1e0 [ 59.378133][ T6804] ? rcu_read_lock_sched_held+0x9c/0xd0 [ 59.383655][ T6804] ? rcu_read_lock_any_held.part.0+0x50/0x50 [ 59.389614][ T6804] ? prandom_u32_state+0xe/0x170 [ 59.394527][ T6804] ? __brelse+0x84/0xa0 [ 59.398660][ T6804] ? __ext4_new_inode+0x144/0x57c0 [ 59.403746][ T6804] ext4_getblk+0xad/0x520 [ 59.408077][ T6804] ? ext4_iomap_overwrite_begin+0xa0/0xa0 [ 59.413774][ T6804] ? ext4_free_inode+0x17e0/0x17e0 [ 59.418863][ T6804] ext4_bread+0x7c/0x380 [ 59.423080][ T6804] ? ext4_getblk+0x520/0x520 [ 59.427818][ T6804] ? dqget+0xff0/0xff0 [ 59.431875][ T6804] ext4_append+0x153/0x360 [ 59.436294][ T6804] ext4_mkdir+0x5e0/0xdf0 [ 59.440603][ T6804] ? ext4_rmdir+0xde0/0xde0 [ 59.445084][ T6804] ? security_inode_permission+0xc4/0xf0 [ 59.450695][ T6804] vfs_mkdir+0x419/0x690 [ 59.454915][ T6804] do_mkdirat+0x21e/0x280 [ 59.459221][ T6804] ? __ia32_sys_mknod+0xb0/0xb0 [ 59.464049][ T6804] ? lockdep_hardirqs_on_prepare+0x3a2/0x590 [ 59.470004][ T6804] ? do_syscall_64+0x21/0x7d0 [ 59.474675][ T6804] ? lockdep_hardirqs_on_prepare+0x3a2/0x590 [ 59.480630][ T6804] do_syscall_64+0xf6/0x7d0 [ 59.485122][ T6804] entry_SYSCALL_64_after_hwframe+0x49/0xb3 [ 59.490988][ T6804] RIP: 0033:0x45bee7 [ 59.494857][ T6804] Code: 1f 40 00 b8 5a 00 00 00 0f 05 48 3d 01 f0 ff ff 0f 83 7d c2 fb ff c3 66 2e 0f 1f 84 00 00 00 00 00 66 90 b8 53 00 00 00 0f 05 <48> 3d 01 f0 ff ff 0f 83 5d c2 fb ff c3 66 2e 0f 1f 84 00 00 00 00 [ 59.514436][ T6804] RSP: 002b:00007ffc3e637278 EFLAGS: 00000206 ORIG_RAX: 0000000000000053 [ 59.522820][ T6804] RAX: ffffffffffffffda RBX: 000000000000e772 RCX: 000000000045bee7 [ 59.530778][ T6804] RDX: 00007ffc3e6372c3 RSI: 00000000000001ff RDI: 00007ffc3e6372c0 [ 59.538725][ T6804] RBP: 0000000000000002 R08: 0000000000000000 R09: 0000000000000003 [ 59.546678][ T6804] R10: 0000000000000064 R11: 0000000000000206 R12: 0000000000000003 [ 59.554624][ T6804] R13: 00007ffc3e6372b0 R14: 000000000000e76e R15: 00007ffc3e6372c0 [ 59.572120][ T1159] BUG: using smp_processor_id() in preemptible [00000000] code: khugepaged/1159 2020/06/12 01:28:12 building call list... [ 59.581325][ T1159] caller is ext4_mb_new_blocks+0xa77/0x3b30 [ 59.587220][ T1159] CPU: 1 PID: 1159 Comm: khugepaged Not tainted 5.7.0-syzkaller #0 [ 59.595128][ T1159] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 59.605182][ T1159] Call Trace: [ 59.608487][ T1159] dump_stack+0x188/0x20d [ 59.612854][ T1159] debug_smp_processor_id.cold+0x88/0x9b [ 59.618494][ T1159] ext4_mb_new_blocks+0xa77/0x3b30 [ 59.623613][ T1159] ? ext4_ext_search_right+0x2ca/0xb20 [ 59.629075][ T1159] ? ext4_ext_next_allocated_block+0x221/0x2d0 [ 59.635232][ T1159] ext4_ext_map_blocks+0x2044/0x3410 [ 59.640525][ T1159] ? ext4_ext_release+0x10/0x10 [ 59.645386][ T1159] ? __down_timeout+0x2d0/0x2d0 [ 59.650228][ T1159] ? ext4_es_lookup_extent+0x41d/0xd30 [ 59.655698][ T1159] ext4_map_blocks+0x4cb/0x1640 [ 59.660556][ T1159] ? ext4_issue_zeroout+0x1e0/0x1e0 [ 59.665750][ T1159] ? debug_smp_processor_id+0x2f/0x185 [ 59.671218][ T1159] ? rcu_read_lock_sched_held+0x9c/0xd0 [ 59.676763][ T1159] ? rcu_read_lock_any_held.part.0+0x50/0x50 [ 59.682738][ T1159] ? ext4_alloc_io_end_vec+0x145/0x1c0 [ 59.688185][ T1159] ext4_writepages+0x1ab7/0x3400 [ 59.693113][ T1159] ? mark_lock+0x30/0xdd0 [ 59.697440][ T1159] ? __ext4_mark_inode_dirty+0x950/0x950 [ 59.703086][ T1159] ? __ext4_mark_inode_dirty+0x950/0x950 [ 59.708722][ T1159] ? do_writepages+0xfa/0x2a0 [ 59.713403][ T1159] do_writepages+0xfa/0x2a0 [ 59.717960][ T1159] ? page_writeback_cpu_online+0x10/0x10 [ 59.723604][ T1159] ? do_raw_spin_lock+0x129/0x2e0 [ 59.728628][ T1159] ? do_raw_spin_unlock+0x171/0x260 [ 59.733818][ T1159] ? _raw_spin_unlock+0x24/0x40 [ 59.738670][ T1159] __filemap_fdatawrite_range+0x2aa/0x390 [ 59.744381][ T1159] ? collapse_file+0x3575/0x4300 [ 59.749310][ T1159] ? delete_from_page_cache_batch+0xec0/0xec0 [ 59.755373][ T1159] ? _raw_spin_unlock_irq+0x1f/0x80 [ 59.760569][ T1159] ? lockdep_hardirqs_on_prepare+0x3a2/0x590 [ 59.766549][ T1159] collapse_file+0x357f/0x4300 [ 59.771316][ T1159] ? collapse_huge_page+0x4370/0x4370 [ 59.776675][ T1159] ? khugepaged+0x24fa/0x3f80 [ 59.781421][ T1159] khugepaged+0x3049/0x3f80 [ 59.785983][ T1159] ? collapse_pte_mapped_thp+0xbf0/0xbf0 [ 59.791606][ T1159] ? lock_downgrade+0x840/0x840 [ 59.796435][ T1159] ? finish_wait+0x260/0x260 [ 59.801013][ T1159] ? _raw_spin_unlock_irqrestore+0x62/0xe0 [ 59.806807][ T1159] ? lockdep_hardirqs_on_prepare+0x3a2/0x590 [ 59.812786][ T1159] ? __kthread_parkme+0x13f/0x1e0 [ 59.817794][ T1159] ? collapse_pte_mapped_thp+0xbf0/0xbf0 [ 59.823417][ T1159] kthread+0x388/0x470 [ 59.827474][ T1159] ? kthread_mod_delayed_work+0x1a0/0x1a0 [ 59.833203][ T1159] ? kthread_mod_delayed_work+0x1a0/0x1a0 [ 59.838918][ T1159] ret_from_fork+0x24/0x30 [ 59.873070][ T1159] BUG: using smp_processor_id() in preemptible [00000000] code: khugepaged/1159 [ 59.882333][ T1159] caller is ext4_mb_new_blocks+0xa77/0x3b30 [ 59.888402][ T1159] CPU: 1 PID: 1159 Comm: khugepaged Not tainted 5.7.0-syzkaller #0 [ 59.896286][ T1159] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 59.906339][ T1159] Call Trace: [ 59.909647][ T1159] dump_stack+0x188/0x20d [ 59.913982][ T1159] debug_smp_processor_id.cold+0x88/0x9b [ 59.919616][ T1159] ext4_mb_new_blocks+0xa77/0x3b30 [ 59.924735][ T1159] ? ext4_ext_search_right+0x2ca/0xb20 [ 59.930198][ T1159] ? ext4_ext_next_allocated_block+0x221/0x2d0 [ 59.936371][ T1159] ext4_ext_map_blocks+0x2044/0x3410 [ 59.941662][ T1159] ? ext4_ext_release+0x10/0x10 [ 59.946535][ T1159] ? __down_timeout+0x2d0/0x2d0 [ 59.951384][ T1159] ? ext4_es_lookup_extent+0x41d/0xd30 [ 59.956854][ T1159] ext4_map_blocks+0x4cb/0x1640 [ 59.961715][ T1159] ? ext4_issue_zeroout+0x1e0/0x1e0 [ 59.966917][ T1159] ? debug_smp_processor_id+0x2f/0x185 [ 59.972382][ T1159] ? rcu_read_lock_sched_held+0x9c/0xd0 [ 59.977931][ T1159] ? rcu_read_lock_any_held.part.0+0x50/0x50 [ 59.983933][ T1159] ? ext4_alloc_io_end_vec+0x145/0x1c0 [ 59.989393][ T1159] ext4_writepages+0x1ab7/0x3400 [ 59.994348][ T1159] ? mark_lock+0x30/0xdd0 [ 59.998693][ T1159] ? __ext4_mark_inode_dirty+0x950/0x950 [ 60.004350][ T1159] ? __ext4_mark_inode_dirty+0x950/0x950 [ 60.009979][ T1159] ? do_writepages+0xfa/0x2a0 [ 60.014657][ T1159] do_writepages+0xfa/0x2a0 [ 60.019164][ T1159] ? page_writeback_cpu_online+0x10/0x10 [ 60.024794][ T1159] ? do_raw_spin_lock+0x129/0x2e0 [ 60.029820][ T1159] ? do_raw_spin_unlock+0x171/0x260 [ 60.035018][ T1159] ? _raw_spin_unlock+0x24/0x40 [ 60.039871][ T1159] __filemap_fdatawrite_range+0x2aa/0x390 [ 60.045583][ T1159] ? collapse_file+0x3575/0x4300 [ 60.050516][ T1159] ? delete_from_page_cache_batch+0xec0/0xec0 [ 60.056584][ T1159] ? _raw_spin_unlock_irq+0x1f/0x80 [ 60.061783][ T1159] ? lockdep_hardirqs_on_prepare+0x3a2/0x590 [ 60.067789][ T1159] collapse_file+0x357f/0x4300 [ 60.072565][ T1159] ? collapse_huge_page+0x4370/0x4370 [ 60.077953][ T1159] ? khugepaged+0x24fa/0x3f80 [ 60.082656][ T1159] khugepaged+0x3049/0x3f80 [ 60.087186][ T1159] ? collapse_pte_mapped_thp+0xbf0/0xbf0 [ 60.092816][ T1159] ? lock_downgrade+0x840/0x840 [ 60.097703][ T1159] ? finish_wait+0x260/0x260 [ 60.102297][ T1159] ? _raw_spin_unlock_irqrestore+0x62/0xe0 [ 60.108099][ T1159] ? lockdep_hardirqs_on_prepare+0x3a2/0x590 [ 60.114092][ T1159] ? __kthread_parkme+0x13f/0x1e0 [ 60.119118][ T1159] ? collapse_pte_mapped_thp+0xbf0/0xbf0 [ 60.124751][ T1159] kthread+0x388/0x470 [ 60.128825][ T1159] ? kthread_mod_delayed_work+0x1a0/0x1a0 [ 60.134551][ T1159] ? kthread_mod_delayed_work+0x1a0/0x1a0 [ 60.140271][ T1159] ret_from_fork+0x24/0x30 [ 60.387300][ T249] tipc: TX() has been purged, node left! executing program [ 60.899505][ T249] ================================================================== [ 60.908608][ T249] BUG: KASAN: use-after-free in afs_wake_up_async_call+0x7a7/0x880 [ 60.916507][ T249] Write of size 1 at addr ffff8880a01059e4 by task kworker/u4:6/249 [ 60.924487][ T249] [ 60.926828][ T249] CPU: 1 PID: 249 Comm: kworker/u4:6 Not tainted 5.7.0-syzkaller #0 [ 60.934798][ T249] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 60.944857][ T249] Workqueue: netns cleanup_net [ 60.949618][ T249] Call Trace: [ 60.952908][ T249] dump_stack+0x188/0x20d [ 60.957238][ T249] ? afs_wake_up_async_call+0x7a7/0x880 [ 60.962787][ T249] ? afs_wake_up_async_call+0x7a7/0x880 [ 60.968330][ T249] ? afs_put_call+0xa70/0xa70 [ 60.973009][ T249] print_address_description.constprop.0.cold+0xd3/0x413 [ 60.980049][ T249] ? vprintk_func+0x97/0x1a6 [ 60.984642][ T249] ? afs_wake_up_async_call+0x7a7/0x880 [ 60.990185][ T249] kasan_report.cold+0x1f/0x37 [ 60.994950][ T249] ? afs_wake_up_async_call+0x7a7/0x880 [ 61.000492][ T249] afs_wake_up_async_call+0x7a7/0x880 [ 61.005860][ T249] ? do_raw_spin_lock+0x129/0x2e0 [ 61.010882][ T249] ? afs_close_socket+0x320/0x320 [ 61.015895][ T249] ? rwlock_bug.part.0+0x90/0x90 [ 61.020846][ T249] ? rcu_read_lock_held+0x9c/0xb0 [ 61.025869][ T249] ? rcu_read_lock_held_common+0xa0/0xa0 [ 61.031499][ T249] ? afs_close_socket+0x320/0x320 [ 61.036551][ T249] ? afs_put_call+0xa70/0xa70 [ 61.041224][ T249] rxrpc_notify_socket+0x1e5/0x5e0 [ 61.046341][ T249] ? afs_put_call+0xa70/0xa70 [ 61.051010][ T249] __rxrpc_set_call_completion.part.0+0x172/0x420 [ 61.057433][ T249] rxrpc_call_completed+0xca/0xf0 [ 61.062474][ T249] rxrpc_discard_prealloc+0x786/0xac0 [ 61.067851][ T249] ? lock_sock_nested+0x94/0x110 [ 61.072793][ T249] rxrpc_listen+0x147/0x360 [ 61.077308][ T249] afs_close_socket+0x95/0x320 [ 61.082068][ T249] ? afs_purge_servers+0x16d/0x300 [ 61.087177][ T249] ? afs_rx_discard_new_call+0x50/0x50 [ 61.092647][ T249] ? debug_smp_processor_id+0x2f/0x185 [ 61.098109][ T249] ? init_wait_var_entry+0x200/0x200 [ 61.103394][ T249] ? rcu_read_lock_held_common+0xa0/0xa0 [ 61.109031][ T249] afs_net_exit+0x1bc/0x310 [ 61.113531][ T249] ? afs_net_init+0xe30/0xe30 [ 61.118202][ T249] ops_exit_list.isra.0+0xa8/0x150 [ 61.123320][ T249] cleanup_net+0x511/0xa50 [ 61.127746][ T249] ? unregister_pernet_device+0x70/0x70 [ 61.133419][ T249] ? rcu_read_lock_any_held.part.0+0x50/0x50 [ 61.139414][ T249] process_one_work+0x965/0x16a0 [ 61.144371][ T249] ? lock_release+0x800/0x800 [ 61.149055][ T249] ? pwq_dec_nr_in_flight+0x310/0x310 [ 61.154430][ T249] ? rwlock_bug.part.0+0x90/0x90 [ 61.159391][ T249] worker_thread+0x96/0xe10 [ 61.163903][ T249] ? process_one_work+0x16a0/0x16a0 [ 61.169113][ T249] kthread+0x388/0x470 [ 61.173180][ T249] ? kthread_mod_delayed_work+0x1a0/0x1a0 [ 61.178894][ T249] ? kthread_mod_delayed_work+0x1a0/0x1a0 [ 61.184621][ T249] ret_from_fork+0x24/0x30 [ 61.189043][ T249] [ 61.191362][ T249] Allocated by task 6804: [ 61.195688][ T249] save_stack+0x1b/0x40 [ 61.199843][ T249] __kasan_kmalloc.constprop.0+0xbf/0xd0 [ 61.205473][ T249] kmem_cache_alloc_trace+0x153/0x7d0 [ 61.210842][ T249] afs_alloc_call+0x55/0x640 [ 61.215424][ T249] afs_charge_preallocation+0xe9/0x2d0 [ 61.220873][ T249] afs_open_socket+0x292/0x360 [ 61.225627][ T249] afs_net_init+0xa6c/0xe30 [ 61.230125][ T249] ops_init+0xaf/0x420 [ 61.234186][ T249] setup_net+0x2de/0x860 [ 61.238423][ T249] copy_net_ns+0x293/0x590 [ 61.242871][ T249] create_new_namespaces+0x3fb/0xb30 [ 61.248150][ T249] unshare_nsproxy_namespaces+0xbd/0x1f0 [ 61.253776][ T249] ksys_unshare+0x43d/0x8e0 [ 61.258272][ T249] __x64_sys_unshare+0x2d/0x40 [ 61.263034][ T249] do_syscall_64+0xf6/0x7d0 [ 61.267530][ T249] entry_SYSCALL_64_after_hwframe+0x49/0xb3 [ 61.273405][ T249] [ 61.275728][ T249] Freed by task 249: [ 61.279616][ T249] save_stack+0x1b/0x40 [ 61.283762][ T249] __kasan_slab_free+0xf7/0x140 [ 61.288605][ T249] kfree+0x109/0x2b0 [ 61.292496][ T249] afs_put_call+0x59b/0xa70 [ 61.296993][ T249] rxrpc_discard_prealloc+0x769/0xac0 [ 61.302355][ T249] rxrpc_listen+0x147/0x360 [ 61.306851][ T249] afs_close_socket+0x95/0x320 [ 61.311606][ T249] afs_net_exit+0x1bc/0x310 [ 61.316103][ T249] ops_exit_list.isra.0+0xa8/0x150 [ 61.321205][ T249] cleanup_net+0x511/0xa50 [ 61.325616][ T249] process_one_work+0x965/0x16a0 [ 61.330548][ T249] worker_thread+0x96/0xe10 [ 61.335041][ T249] kthread+0x388/0x470 [ 61.339103][ T249] ret_from_fork+0x24/0x30 [ 61.343503][ T249] [ 61.345824][ T249] The buggy address belongs to the object at ffff8880a0105800 [ 61.345824][ T249] which belongs to the cache kmalloc-1k of size 1024 [ 61.359870][ T249] The buggy address is located 484 bytes inside of [ 61.359870][ T249] 1024-byte region [ffff8880a0105800, ffff8880a0105c00) [ 61.373216][ T249] The buggy address belongs to the page: [ 61.378847][ T249] page:ffffea0002804140 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 [ 61.387985][ T249] flags: 0xfffe0000000200(slab) [ 61.392834][ T249] raw: 00fffe0000000200 ffffea000251ab48 ffffea00029ef908 ffff8880aa000c40 [ 61.401418][ T249] raw: 0000000000000000 ffff8880a0105000 0000000100000002 0000000000000000 [ 61.410003][ T249] page dumped because: kasan: bad access detected [ 61.416407][ T249] [ 61.418730][ T249] Memory state around the buggy address: [ 61.424362][ T249] ffff8880a0105880: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 61.432415][ T249] ffff8880a0105900: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 61.440468][ T249] >ffff8880a0105980: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 61.448793][ T249] ^ [ 61.455988][ T249] ffff8880a0105a00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 61.464051][ T249] ffff8880a0105a80: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 61.472120][ T249] ================================================================== [ 61.480179][ T249] Disabling lock debugging due to kernel taint [ 61.486407][ T249] Kernel panic - not syncing: panic_on_warn set ... [ 61.492999][ T249] CPU: 1 PID: 249 Comm: kworker/u4:6 Tainted: G B 5.7.0-syzkaller #0 [ 61.502355][ T249] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 61.512415][ T249] Workqueue: netns cleanup_net [ 61.517168][ T249] Call Trace: [ 61.520457][ T249] dump_stack+0x188/0x20d [ 61.524830][ T249] ? afs_wake_up_async_call+0x6b0/0x880 [ 61.530359][ T249] ? afs_put_call+0xa70/0xa70 [ 61.535796][ T249] panic+0x2e3/0x75c [ 61.539769][ T249] ? add_taint.cold+0x16/0x16 [ 61.544438][ T249] ? retint_kernel+0x2b/0x2b [ 61.549027][ T249] ? trace_hardirqs_on+0x55/0x230 [ 61.554046][ T249] ? afs_wake_up_async_call+0x7a7/0x880 [ 61.559585][ T249] ? afs_wake_up_async_call+0x7a7/0x880 [ 61.565124][ T249] ? afs_put_call+0xa70/0xa70 [ 61.569787][ T249] end_report+0x4d/0x53 [ 61.573914][ T249] kasan_report.cold+0xd/0x37 [ 61.578612][ T249] ? afs_wake_up_async_call+0x7a7/0x880 [ 61.584161][ T249] afs_wake_up_async_call+0x7a7/0x880 [ 61.589508][ T249] ? do_raw_spin_lock+0x129/0x2e0 [ 61.594512][ T249] ? afs_close_socket+0x320/0x320 [ 61.599522][ T249] ? rwlock_bug.part.0+0x90/0x90 [ 61.604430][ T249] ? rcu_read_lock_held+0x9c/0xb0 [ 61.609427][ T249] ? rcu_read_lock_held_common+0xa0/0xa0 [ 61.615031][ T249] ? afs_close_socket+0x320/0x320 [ 61.620051][ T249] ? afs_put_call+0xa70/0xa70 [ 61.624710][ T249] rxrpc_notify_socket+0x1e5/0x5e0 [ 61.629793][ T249] ? afs_put_call+0xa70/0xa70 [ 61.634440][ T249] __rxrpc_set_call_completion.part.0+0x172/0x420 [ 61.640844][ T249] rxrpc_call_completed+0xca/0xf0 [ 61.645841][ T249] rxrpc_discard_prealloc+0x786/0xac0 [ 61.651206][ T249] ? lock_sock_nested+0x94/0x110 [ 61.656129][ T249] rxrpc_listen+0x147/0x360 [ 61.660622][ T249] afs_close_socket+0x95/0x320 [ 61.665354][ T249] ? afs_purge_servers+0x16d/0x300 [ 61.670437][ T249] ? afs_rx_discard_new_call+0x50/0x50 [ 61.675881][ T249] ? debug_smp_processor_id+0x2f/0x185 [ 61.681314][ T249] ? init_wait_var_entry+0x200/0x200 [ 61.686584][ T249] ? rcu_read_lock_held_common+0xa0/0xa0 [ 61.692214][ T249] afs_net_exit+0x1bc/0x310 [ 61.696704][ T249] ? afs_net_init+0xe30/0xe30 [ 61.701365][ T249] ops_exit_list.isra.0+0xa8/0x150 [ 61.706448][ T249] cleanup_net+0x511/0xa50 [ 61.710875][ T249] ? unregister_pernet_device+0x70/0x70 [ 61.716432][ T249] ? rcu_read_lock_any_held.part.0+0x50/0x50 [ 61.722387][ T249] process_one_work+0x965/0x16a0 [ 61.727334][ T249] ? lock_release+0x800/0x800 [ 61.731983][ T249] ? pwq_dec_nr_in_flight+0x310/0x310 [ 61.737329][ T249] ? rwlock_bug.part.0+0x90/0x90 [ 61.742240][ T249] worker_thread+0x96/0xe10 [ 61.746820][ T249] ? process_one_work+0x16a0/0x16a0 [ 61.751997][ T249] kthread+0x388/0x470 [ 61.756074][ T249] ? kthread_mod_delayed_work+0x1a0/0x1a0 [ 61.761765][ T249] ? kthread_mod_delayed_work+0x1a0/0x1a0 [ 61.767457][ T249] ret_from_fork+0x24/0x30 [ 61.773101][ T249] Kernel Offset: disabled [ 61.777415][ T249] Rebooting in 86400 seconds..