[ 48.337676][ T6742] RAX: ffffffffffffffda RBX: 0000563a4220e985 RCX: 00007ffa21818687 [ 48.345634][ T6742] RDX: 00007ffecd6c5fc0 RSI: 00000000000001ed RDI: 0000563a4220e985 [ 48.353585][ T6742] RBP: 00007ffa21818680 R08: 0000000000000100 R09: 0000000000000000 [ 48.361548][ T6742] R10: 0000563a4220e980 R11: 0000000000000246 R12: 00000000000001ed [ 48.369506][ T6742] R13: 00007ffecd6c6280 R14: 0000000000000000 R15: 0000000000000000 Debian GNU/Linux 9 syzkaller ttyS0 Warning: Permanently added '10.128.15.193' (ECDSA) to the list of known hosts. 2020/06/13 05:34:19 fuzzer started 2020/06/13 05:34:20 connecting to host at 10.128.0.26:46259 2020/06/13 05:34:20 checking machine... 2020/06/13 05:34:20 checking revisions... 2020/06/13 05:34:20 testing simple program... syzkaller login: [ 58.167915][ T6784] BUG: using smp_processor_id() in preemptible [00000000] code: syz-fuzzer/6784 [ 58.177054][ T6784] caller is ext4_mb_new_blocks+0xa77/0x3b30 [ 58.183069][ T6784] CPU: 1 PID: 6784 Comm: syz-fuzzer Not tainted 5.7.0-syzkaller #0 [ 58.190948][ T6784] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 58.201081][ T6784] Call Trace: [ 58.204385][ T6784] dump_stack+0x188/0x20d [ 58.208696][ T6784] debug_smp_processor_id.cold+0x88/0x9b [ 58.214307][ T6784] ext4_mb_new_blocks+0xa77/0x3b30 [ 58.219406][ T6784] ? ext4_ext_search_right+0x2ca/0xb20 [ 58.224854][ T6784] ? ext4_inode_to_goal_block+0x2df/0x3f0 [ 58.230555][ T6784] ext4_ext_map_blocks+0x2044/0x3410 [ 58.235821][ T6784] ? ext4_ext_release+0x10/0x10 [ 58.240673][ T6784] ? __down_timeout+0x2d0/0x2d0 [ 58.245509][ T6784] ? ext4_es_lookup_extent+0x41d/0xd30 [ 58.250946][ T6784] ext4_map_blocks+0x4cb/0x1640 [ 58.255789][ T6784] ? ext4_issue_zeroout+0x1e0/0x1e0 [ 58.260974][ T6784] ? rcu_read_lock_sched_held+0x9c/0xd0 [ 58.266517][ T6784] ? rcu_read_lock_any_held.part.0+0x50/0x50 [ 58.272931][ T6784] ? prandom_u32_state+0xe/0x170 [ 58.277852][ T6784] ? __brelse+0x84/0xa0 [ 58.282003][ T6784] ? __ext4_new_inode+0x144/0x57c0 [ 58.287105][ T6784] ext4_getblk+0xad/0x520 [ 58.291412][ T6784] ? ext4_iomap_overwrite_begin+0xa0/0xa0 [ 58.297132][ T6784] ? ext4_free_inode+0x17e0/0x17e0 [ 58.302221][ T6784] ext4_bread+0x7c/0x380 [ 58.306439][ T6784] ? ext4_getblk+0x520/0x520 [ 58.311525][ T6784] ? dqget+0xff0/0xff0 [ 58.315586][ T6784] ext4_append+0x153/0x360 [ 58.320047][ T6784] ext4_mkdir+0x5e0/0xdf0 [ 58.324379][ T6784] ? ext4_rmdir+0xde0/0xde0 [ 58.328883][ T6784] ? security_inode_permission+0xc4/0xf0 [ 58.334502][ T6784] vfs_mkdir+0x419/0x690 [ 58.338733][ T6784] do_mkdirat+0x21e/0x280 [ 58.343054][ T6784] ? __ia32_sys_mknod+0xb0/0xb0 [ 58.348129][ T6784] ? lockdep_hardirqs_on_prepare+0x3a2/0x590 [ 58.354097][ T6784] ? do_syscall_64+0x21/0x7d0 [ 58.358752][ T6784] ? lockdep_hardirqs_on_prepare+0x3a2/0x590 [ 58.364710][ T6784] do_syscall_64+0xf6/0x7d0 [ 58.369194][ T6784] entry_SYSCALL_64_after_hwframe+0x49/0xb3 [ 58.375063][ T6784] RIP: 0033:0x4b02a0 [ 58.378935][ T6784] 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 [ 58.399121][ T6784] RSP: 002b:000000c0000e74b8 EFLAGS: 00000212 ORIG_RAX: 0000000000000102 [ 58.407507][ T6784] RAX: ffffffffffffffda RBX: 000000c00002c000 RCX: 00000000004b02a0 [ 58.415459][ T6784] RDX: 00000000000001c0 RSI: 000000c000027140 RDI: ffffffffffffff9c [ 58.423403][ T6784] RBP: 000000c0000e7510 R08: 0000000000000000 R09: 0000000000000000 [ 58.431350][ T6784] R10: 0000000000000000 R11: 0000000000000212 R12: ffffffffffffffff [ 58.439308][ T6784] R13: 000000000000008b R14: 000000000000008a R15: 0000000000000100 [ 58.474915][ T6794] BUG: using smp_processor_id() in preemptible [00000000] code: syz-executor.0/6794 [ 58.484441][ T6794] caller is ext4_mb_new_blocks+0xa77/0x3b30 [ 58.490332][ T6794] CPU: 0 PID: 6794 Comm: syz-executor.0 Not tainted 5.7.0-syzkaller #0 [ 58.498545][ T6794] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 58.508578][ T6794] Call Trace: [ 58.511852][ T6794] dump_stack+0x188/0x20d [ 58.516186][ T6794] debug_smp_processor_id.cold+0x88/0x9b [ 58.521798][ T6794] ext4_mb_new_blocks+0xa77/0x3b30 [ 58.526900][ T6794] ? ext4_ext_search_right+0x2ca/0xb20 [ 58.532338][ T6794] ? ext4_inode_to_goal_block+0x2df/0x3f0 [ 58.538037][ T6794] ext4_ext_map_blocks+0x2044/0x3410 [ 58.543321][ T6794] ? ext4_ext_release+0x10/0x10 [ 58.548170][ T6794] ? __down_timeout+0x2d0/0x2d0 [ 58.553012][ T6794] ? ext4_es_lookup_extent+0x41d/0xd30 [ 58.558465][ T6794] ext4_map_blocks+0x4cb/0x1640 [ 58.563315][ T6794] ? ext4_issue_zeroout+0x1e0/0x1e0 [ 58.568499][ T6794] ? rcu_read_lock_sched_held+0x9c/0xd0 [ 58.574026][ T6794] ? rcu_read_lock_any_held.part.0+0x50/0x50 [ 58.579984][ T6794] ? prandom_u32_state+0xe/0x170 [ 58.584910][ T6794] ? __brelse+0x84/0xa0 [ 58.589051][ T6794] ? __ext4_new_inode+0x144/0x57c0 [ 58.594142][ T6794] ext4_getblk+0xad/0x520 [ 58.598453][ T6794] ? ext4_iomap_overwrite_begin+0xa0/0xa0 [ 58.604184][ T6794] ? ext4_free_inode+0x17e0/0x17e0 [ 58.609298][ T6794] ext4_bread+0x7c/0x380 [ 58.613540][ T6794] ? ext4_getblk+0x520/0x520 [ 58.618124][ T6794] ? dqget+0xff0/0xff0 [ 58.622198][ T6794] ext4_append+0x153/0x360 [ 58.626616][ T6794] ext4_mkdir+0x5e0/0xdf0 [ 58.630935][ T6794] ? ext4_rmdir+0xde0/0xde0 [ 58.635423][ T6794] ? security_inode_permission+0xc4/0xf0 [ 58.641053][ T6794] vfs_mkdir+0x419/0x690 [ 58.645305][ T6794] do_mkdirat+0x21e/0x280 [ 58.649625][ T6794] ? __ia32_sys_mknod+0xb0/0xb0 [ 58.654455][ T6794] ? lockdep_hardirqs_on_prepare+0x3a2/0x590 [ 58.660416][ T6794] ? do_syscall_64+0x21/0x7d0 [ 58.665086][ T6794] ? lockdep_hardirqs_on_prepare+0x3a2/0x590 [ 58.671072][ T6794] do_syscall_64+0xf6/0x7d0 [ 58.675660][ T6794] entry_SYSCALL_64_after_hwframe+0x49/0xb3 [ 58.681537][ T6794] RIP: 0033:0x45bee7 [ 58.685429][ T6794] 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 [ 58.705015][ T6794] RSP: 002b:00007fff79ed3068 EFLAGS: 00000246 ORIG_RAX: 0000000000000053 [ 58.713406][ T6794] RAX: ffffffffffffffda RBX: 000000000003a2f8 RCX: 000000000045bee7 [ 58.721351][ T6794] RDX: 0000000000000003 RSI: 00000000000001c0 RDI: 00007fff79ed3240 [ 58.729299][ T6794] RBP: 0000000000000001 R08: 000000000000f8c0 R09: 0000000000003140 [ 58.737249][ T6794] R10: 0000000000000011 R11: 0000000000000246 R12: 00000000000000c2 [ 58.745291][ T6794] R13: 00007fff79ed3240 R14: 8421084210842109 R15: 00007fff79ed324c [ 58.830390][ T6795] IPVS: ftp: loaded support on port[0] = 21 [ 58.867873][ T6795] BUG: using smp_processor_id() in preemptible [00000000] code: syz-executor.0/6795 [ 58.877437][ T6795] caller is ext4_mb_new_blocks+0xa77/0x3b30 [ 58.883540][ T6795] CPU: 1 PID: 6795 Comm: syz-executor.0 Not tainted 5.7.0-syzkaller #0 [ 58.891765][ T6795] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 58.901796][ T6795] Call Trace: [ 58.905077][ T6795] dump_stack+0x188/0x20d [ 58.909503][ T6795] debug_smp_processor_id.cold+0x88/0x9b [ 58.915200][ T6795] ext4_mb_new_blocks+0xa77/0x3b30 [ 58.920303][ T6795] ? ext4_ext_search_right+0x2ca/0xb20 [ 58.925736][ T6795] ? ext4_inode_to_goal_block+0x2df/0x3f0 [ 58.931441][ T6795] ext4_ext_map_blocks+0x2044/0x3410 [ 58.936715][ T6795] ? ext4_ext_release+0x10/0x10 [ 58.941560][ T6795] ? __down_timeout+0x2d0/0x2d0 [ 58.946384][ T6795] ? ext4_es_lookup_extent+0x41d/0xd30 [ 58.951824][ T6795] ext4_map_blocks+0x4cb/0x1640 [ 58.956652][ T6795] ? ext4_issue_zeroout+0x1e0/0x1e0 [ 58.961826][ T6795] ? rcu_read_lock_sched_held+0x9c/0xd0 [ 58.967344][ T6795] ? rcu_read_lock_any_held.part.0+0x50/0x50 [ 58.973308][ T6795] ? prandom_u32_state+0xe/0x170 [ 58.978362][ T6795] ? __brelse+0x84/0xa0 [ 58.982535][ T6795] ? __ext4_new_inode+0x144/0x57c0 [ 58.987631][ T6795] ext4_getblk+0xad/0x520 [ 58.991943][ T6795] ? ext4_iomap_overwrite_begin+0xa0/0xa0 [ 58.997644][ T6795] ? ext4_free_inode+0x17e0/0x17e0 [ 59.002746][ T6795] ext4_bread+0x7c/0x380 [ 59.006963][ T6795] ? ext4_getblk+0x520/0x520 [ 59.011529][ T6795] ? dqget+0xff0/0xff0 [ 59.015587][ T6795] ext4_append+0x153/0x360 [ 59.019979][ T6795] ext4_mkdir+0x5e0/0xdf0 [ 59.024290][ T6795] ? ext4_rmdir+0xde0/0xde0 [ 59.028780][ T6795] ? security_inode_permission+0xc4/0xf0 [ 59.034391][ T6795] vfs_mkdir+0x419/0x690 [ 59.038609][ T6795] do_mkdirat+0x21e/0x280 [ 59.043015][ T6795] ? __ia32_sys_mknod+0xb0/0xb0 [ 59.047838][ T6795] ? lockdep_hardirqs_on_prepare+0x3a2/0x590 [ 59.053797][ T6795] ? do_syscall_64+0x21/0x7d0 [ 59.058449][ T6795] ? lockdep_hardirqs_on_prepare+0x3a2/0x590 [ 59.064406][ T6795] do_syscall_64+0xf6/0x7d0 [ 59.068898][ T6795] entry_SYSCALL_64_after_hwframe+0x49/0xb3 [ 59.074762][ T6795] RIP: 0033:0x45bee7 [ 59.078640][ T6795] 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 [ 59.098240][ T6795] RSP: 002b:00007fff79ed2f58 EFLAGS: 00000202 ORIG_RAX: 0000000000000053 [ 59.106653][ T6795] RAX: ffffffffffffffda RBX: 000000000078c988 RCX: 000000000045bee7 [ 59.114640][ T6795] RDX: 00007fff79ed2fa3 RSI: 00000000000001ff RDI: 00007fff79ed2fa0 [ 59.123914][ T6795] RBP: 00000000000000f8 R08: 0000000000000000 R09: 0000000000000003 [ 59.131861][ T6795] R10: 0000000000000064 R11: 0000000000000202 R12: 00000000004185d0 [ 59.139807][ T6795] R13: 00007fff79ed2f90 R14: 0000000000000000 R15: 00007fff79ed2fa0 [ 59.201631][ T6795] BUG: using smp_processor_id() in preemptible [00000000] code: syz-executor.0/6795 [ 59.211119][ T6795] caller is ext4_mb_new_blocks+0xa77/0x3b30 [ 59.217115][ T6795] CPU: 1 PID: 6795 Comm: syz-executor.0 Not tainted 5.7.0-syzkaller #0 [ 59.225363][ T6795] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 59.235412][ T6795] Call Trace: [ 59.238876][ T6795] dump_stack+0x188/0x20d [ 59.243209][ T6795] debug_smp_processor_id.cold+0x88/0x9b [ 59.248843][ T6795] ext4_mb_new_blocks+0xa77/0x3b30 [ 59.253969][ T6795] ? ext4_ext_search_right+0x2ca/0xb20 [ 59.259426][ T6795] ? ext4_inode_to_goal_block+0x2df/0x3f0 [ 59.265140][ T6795] ext4_ext_map_blocks+0x2044/0x3410 [ 59.270412][ T6795] ? ext4_ext_release+0x10/0x10 [ 59.275259][ T6795] ? __down_timeout+0x2d0/0x2d0 [ 59.280083][ T6795] ? ext4_es_lookup_extent+0x41d/0xd30 [ 59.285520][ T6795] ext4_map_blocks+0x4cb/0x1640 [ 59.290346][ T6795] ? ext4_issue_zeroout+0x1e0/0x1e0 [ 59.295606][ T6795] ? rcu_read_lock_sched_held+0x9c/0xd0 [ 59.301126][ T6795] ? rcu_read_lock_any_held.part.0+0x50/0x50 [ 59.307081][ T6795] ? prandom_u32_state+0xe/0x170 [ 59.312004][ T6795] ? __brelse+0x84/0xa0 [ 59.316190][ T6795] ? __ext4_new_inode+0x144/0x57c0 [ 59.321276][ T6795] ext4_getblk+0xad/0x520 [ 59.325587][ T6795] ? ext4_iomap_overwrite_begin+0xa0/0xa0 [ 59.331294][ T6795] ? ext4_free_inode+0x17e0/0x17e0 [ 59.336382][ T6795] ext4_bread+0x7c/0x380 [ 59.340596][ T6795] ? ext4_getblk+0x520/0x520 [ 59.345182][ T6795] ? dqget+0xff0/0xff0 [ 59.349240][ T6795] ext4_append+0x153/0x360 [ 59.353635][ T6795] ext4_mkdir+0x5e0/0xdf0 [ 59.357943][ T6795] ? ext4_rmdir+0xde0/0xde0 [ 59.362420][ T6795] ? security_inode_permission+0xc4/0xf0 [ 59.368029][ T6795] vfs_mkdir+0x419/0x690 [ 59.372258][ T6795] do_mkdirat+0x21e/0x280 [ 59.376564][ T6795] ? __ia32_sys_mknod+0xb0/0xb0 [ 59.381389][ T6795] ? lockdep_hardirqs_on_prepare+0x3a2/0x590 [ 59.387345][ T6795] ? do_syscall_64+0x21/0x7d0 [ 59.391995][ T6795] ? lockdep_hardirqs_on_prepare+0x3a2/0x590 [ 59.397951][ T6795] do_syscall_64+0xf6/0x7d0 [ 59.402431][ T6795] entry_SYSCALL_64_after_hwframe+0x49/0xb3 [ 59.408305][ T6795] RIP: 0033:0x45bee7 [ 59.412261][ T6795] 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 [ 59.431854][ T6795] RSP: 002b:00007fff79ed2f58 EFLAGS: 00000202 ORIG_RAX: 0000000000000053 [ 59.440254][ T6795] RAX: ffffffffffffffda RBX: 000000000000e736 RCX: 000000000045bee7 2020/06/13 05:34:21 building call list... [ 59.448202][ T6795] RDX: 00007fff79ed2fa3 RSI: 00000000000001ff RDI: 00007fff79ed2fa0 [ 59.456424][ T6795] RBP: 0000000000000002 R08: 0000000000000000 R09: 0000000000000003 [ 59.464389][ T6795] R10: 0000000000000064 R11: 0000000000000202 R12: 0000000000000003 [ 59.472522][ T6795] R13: 00007fff79ed2f90 R14: 000000000000e725 R15: 00007fff79ed2fa0 [ 59.712552][ T120] tipc: TX() has been purged, node left! executing program [ 61.107448][ T6781] can: request_module (can-proto-0) failed. [ 61.687204][ T6781] can: request_module (can-proto-0) failed. [ 61.698569][ T6781] can: request_module (can-proto-0) failed.