Starting Load/Save RF Kill Switch Status... [ 53.122121][ T6768] BUG: using smp_processor_id() in preemptible [00000000] code: systemd-rfkill/6768 [ 53.131680][ T6768] caller is ext4_mb_new_blocks+0xa4d/0x3b70 [ 53.137553][ T6768] CPU: 0 PID: 6768 Comm: systemd-rfkill Not tainted 5.7.0-syzkaller #0 [ 53.145854][ T6768] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 53.155908][ T6768] Call Trace: [ 53.160397][ T6768] dump_stack+0x18f/0x20d [ 53.164706][ T6768] check_preemption_disabled+0x20d/0x220 [ 53.171533][ T6768] ext4_mb_new_blocks+0xa4d/0x3b70 [ 53.176625][ T6768] ? ext4_ext_search_right+0x2ca/0xb20 [ 53.182066][ T6768] ? ext4_inode_to_goal_block+0x2df/0x3f0 [ 53.187838][ T6768] ext4_ext_map_blocks+0x201b/0x33e0 [ 53.193170][ T6768] ? ext4_ext_release+0x10/0x10 [ 53.198049][ T6768] ? down_write_killable+0x170/0x170 [ 53.203312][ T6768] ? ext4_es_lookup_extent+0x41d/0xd10 [ 53.208756][ T6768] ext4_map_blocks+0x4cb/0x1640 [ 53.213686][ T6768] ? ext4_issue_zeroout+0x1e0/0x1e0 [ 53.219213][ T6768] ? rcu_read_lock_sched_held+0x9c/0xd0 [ 53.224733][ T6768] ? rcu_read_lock_any_held.part.0+0x50/0x50 [ 53.230703][ T6768] ? prandom_u32_state+0xe/0x170 [ 53.235629][ T6768] ? __brelse+0x84/0xa0 [ 53.239758][ T6768] ? __ext4_new_inode+0x144/0x55e0 [ 53.244857][ T6768] ext4_getblk+0xad/0x520 [ 53.249173][ T6768] ? ext4_iomap_overwrite_begin+0xa0/0xa0 [ 53.254959][ T6768] ? ext4_free_inode+0x1700/0x1700 [ 53.260049][ T6768] ext4_bread+0x7c/0x380 [ 53.264267][ T6768] ? ext4_getblk+0x520/0x520 [ 53.268831][ T6768] ? dquot_get_next_dqblk+0x180/0x180 [ 53.274181][ T6768] ext4_append+0x153/0x360 [ 53.278576][ T6768] ext4_mkdir+0x5e0/0xdf0 [ 53.282914][ T6768] ? ext4_rmdir+0xde0/0xde0 [ 53.287407][ T6768] ? security_inode_permission+0xc4/0xf0 [ 53.293045][ T6768] vfs_mkdir+0x419/0x690 [ 53.297275][ T6768] do_mkdirat+0x21e/0x280 [ 53.301592][ T6768] ? __ia32_sys_mknod+0xb0/0xb0 [ 53.306417][ T6768] ? do_syscall_64+0x1c/0xe0 [ 53.310983][ T6768] ? lockdep_hardirqs_on_prepare+0x3a2/0x590 [ 53.316939][ T6768] do_syscall_64+0x60/0xe0 [ 53.321340][ T6768] entry_SYSCALL_64_after_hwframe+0x44/0xa9 [ 53.327219][ T6768] RIP: 0033:0x7fd58658a687 [ 53.331615][ T6768] Code: Bad RIP value. [ 53.336000][ T6768] RSP: 002b:00007fff82a7bd98 EFLAGS: 00000246 ORIG_RAX: 0000000000000053 [ 53.336015][ T6768] RAX: ffffffffffffffda RBX: 000055fa9c2f5985 RCX: 00007fd58658a687 [ 53.336030][ T6768] RDX: 00007fff82a7bc60 RSI: 00000000000001ed RDI: 000055fa9c2f5985 [ 53.336038][ T6768] RBP: 00007fd58658a680 R08: 0000000000000100 R09: 0000000000000000 [ 53.336047][ T6768] R10: 000055fa9c2f5980 R11: 0000000000000246 R12: 00000000000001ed [ 53.336054][ T6768] R13: 00007fff82a7bf20 R14: 0000000000000000 R15: 0000000000000000 Debian GNU/Linux 9 syzkaller ttyS0 syzkaller login: [ 56.248504][ T26] BUG: using smp_processor_id() in preemptible [00000000] code: kworker/u4:2/26 [ 56.257539][ T26] caller is ext4_mb_new_blocks+0xa4d/0x3b70 [ 56.263673][ T26] CPU: 0 PID: 26 Comm: kworker/u4:2 Not tainted 5.7.0-syzkaller #0 [ 56.271711][ T26] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 56.281768][ T26] Workqueue: writeback wb_workfn (flush-8:0) [ 56.287727][ T26] Call Trace: [ 56.291095][ T26] dump_stack+0x18f/0x20d [ 56.295413][ T26] check_preemption_disabled+0x20d/0x220 [ 56.301033][ T26] ext4_mb_new_blocks+0xa4d/0x3b70 [ 56.306139][ T26] ? ext4_find_extent+0x81a/0xad0 [ 56.311149][ T26] ? ext4_ext_search_right+0x2ca/0xb20 [ 56.316606][ T26] ? ext4_inode_to_goal_block+0x2df/0x3f0 [ 56.322310][ T26] ext4_ext_map_blocks+0x201b/0x33e0 [ 56.328899][ T26] ? ext4_ext_release+0x10/0x10 [ 56.333748][ T26] ? down_write_killable+0x170/0x170 [ 56.339011][ T26] ? ext4_es_lookup_extent+0x41d/0xd10 [ 56.344457][ T26] ext4_map_blocks+0x4cb/0x1640 [ 56.349292][ T26] ? ext4_issue_zeroout+0x1e0/0x1e0 [ 56.354486][ T26] ? rcu_read_lock_sched_held+0x9c/0xd0 [ 56.360012][ T26] ? rcu_read_lock_any_held.part.0+0x50/0x50 [ 56.365987][ T26] ? ext4_alloc_io_end_vec+0x145/0x1c0 [ 56.371431][ T26] ext4_writepages+0x1a7b/0x33c0 [ 56.376365][ T26] ? __ext4_mark_inode_dirty+0x940/0x940 [ 56.381993][ T26] ? __lock_acquire+0x2224/0x48b0 [ 56.387008][ T26] ? lockdep_hardirqs_on_prepare+0x590/0x590 [ 56.392981][ T26] ? lockdep_hardirqs_on_prepare+0x590/0x590 [ 56.398942][ T26] ? __ext4_mark_inode_dirty+0x940/0x940 [ 56.405160][ T26] ? do_writepages+0xfa/0x2a0 [ 56.409819][ T26] do_writepages+0xfa/0x2a0 [ 56.414329][ T26] ? page_writeback_cpu_online+0x10/0x10 [ 56.420243][ T26] ? rcu_read_lock_sched_held+0x9c/0xd0 [ 56.425767][ T26] ? rcu_read_lock_any_held.part.0+0x50/0x50 [ 56.431844][ T26] ? lock_downgrade+0x840/0x840 [ 56.436679][ T26] __writeback_single_inode+0x12a/0x13d0 [ 56.442301][ T26] ? _raw_spin_unlock+0x24/0x40 [ 56.447129][ T26] ? wbc_attach_and_unlock_inode+0x60a/0x9c0 [ 56.453106][ T26] writeback_sb_inodes+0x515/0xdc0 [ 56.458229][ T26] ? __writeback_single_inode+0x13d0/0x13d0 [ 56.464115][ T26] __writeback_inodes_wb+0xc3/0x250 [ 56.469296][ T26] wb_writeback+0x8db/0xd50 [ 56.473792][ T26] ? writeback_inodes_wb.constprop.0+0x1a0/0x1a0 [ 56.480117][ T26] ? _find_next_bit.constprop.0+0x1a3/0x200 [ 56.485989][ T26] ? cpumask_next+0x3c/0x40 [ 56.490495][ T26] ? get_nr_dirty_inodes+0xd6/0x130 [ 56.495673][ T26] wb_workfn+0xab3/0x1090 [ 56.499984][ T26] ? inode_wait_for_writeback+0x30/0x30 [ 56.505509][ T26] ? rcu_read_lock_sched_held+0x9c/0xd0 [ 56.511030][ T26] ? rcu_read_lock_any_held.part.0+0x50/0x50 [ 56.516990][ T26] process_one_work+0x965/0x1690 [ 56.521938][ T26] ? lock_release+0x800/0x800 [ 56.526610][ T26] ? pwq_dec_nr_in_flight+0x310/0x310 [ 56.531989][ T26] ? rwlock_bug.part.0+0x90/0x90 [ 56.536908][ T26] worker_thread+0x96/0xe10 [ 56.541394][ T26] ? process_one_work+0x1690/0x1690 [ 56.547024][ T26] kthread+0x3b5/0x4a0 [ 56.551069][ T26] ? kthread_mod_delayed_work+0x1a0/0x1a0 [ 56.556761][ T26] ? kthread_mod_delayed_work+0x1a0/0x1a0 [ 56.562566][ T26] ret_from_fork+0x1f/0x30 Warning: Permanently added '10.128.10.62' (ECDSA) to the list of known hosts. 2020/06/15 08:26:49 fuzzer started 2020/06/15 08:26:49 connecting to host at 10.128.0.26:38083 2020/06/15 08:26:49 checking machine... 2020/06/15 08:26:49 checking revisions... 2020/06/15 08:26:49 testing simple program... [ 58.806549][ T6840] BUG: using smp_processor_id() in preemptible [00000000] code: syz-fuzzer/6840 [ 58.815825][ T6840] caller is ext4_mb_new_blocks+0xa4d/0x3b70 [ 58.822065][ T6840] CPU: 1 PID: 6840 Comm: syz-fuzzer Not tainted 5.7.0-syzkaller #0 [ 58.830023][ T6840] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 58.840060][ T6840] Call Trace: [ 58.843393][ T6840] dump_stack+0x18f/0x20d [ 58.847779][ T6840] check_preemption_disabled+0x20d/0x220 [ 58.853407][ T6840] ext4_mb_new_blocks+0xa4d/0x3b70 [ 58.858514][ T6840] ? ext4_ext_search_right+0x2ca/0xb20 [ 58.863980][ T6840] ? ext4_inode_to_goal_block+0x2df/0x3f0 [ 58.869707][ T6840] ext4_ext_map_blocks+0x201b/0x33e0 [ 58.874997][ T6840] ? ext4_ext_release+0x10/0x10 [ 58.879838][ T6840] ? down_write_killable+0x170/0x170 [ 58.885100][ T6840] ? ext4_es_lookup_extent+0x41d/0xd10 [ 58.890539][ T6840] ext4_map_blocks+0x4cb/0x1640 [ 58.895373][ T6840] ? ext4_issue_zeroout+0x1e0/0x1e0 [ 58.900578][ T6840] ? rcu_read_lock_sched_held+0x9c/0xd0 [ 58.906120][ T6840] ? rcu_read_lock_any_held.part.0+0x50/0x50 [ 58.912074][ T6840] ? prandom_u32_state+0xe/0x170 [ 58.917007][ T6840] ? __brelse+0x84/0xa0 [ 58.921160][ T6840] ? __ext4_new_inode+0x144/0x55e0 [ 58.926266][ T6840] ext4_getblk+0xad/0x520 [ 58.930580][ T6840] ? ext4_iomap_overwrite_begin+0xa0/0xa0 [ 58.936381][ T6840] ? ext4_free_inode+0x1700/0x1700 [ 58.941486][ T6840] ext4_bread+0x7c/0x380 [ 58.945715][ T6840] ? ext4_getblk+0x520/0x520 [ 58.950293][ T6840] ? dquot_get_next_dqblk+0x180/0x180 [ 58.955666][ T6840] ext4_append+0x153/0x360 [ 58.960069][ T6840] ext4_mkdir+0x5e0/0xdf0 [ 58.964382][ T6840] ? ext4_rmdir+0xde0/0xde0 [ 58.968871][ T6840] ? security_inode_permission+0xc4/0xf0 [ 58.974491][ T6840] vfs_mkdir+0x419/0x690 [ 58.978737][ T6840] do_mkdirat+0x21e/0x280 [ 58.983047][ T6840] ? __ia32_sys_mknod+0xb0/0xb0 [ 58.987879][ T6840] ? do_syscall_64+0x1c/0xe0 [ 58.992596][ T6840] ? lockdep_hardirqs_on_prepare+0x3a2/0x590 [ 58.998571][ T6840] do_syscall_64+0x60/0xe0 [ 59.003178][ T6840] entry_SYSCALL_64_after_hwframe+0x44/0xa9 [ 59.009068][ T6840] RIP: 0033:0x4b02a0 [ 59.012933][ T6840] Code: Bad RIP value. [ 59.017069][ T6840] RSP: 002b:000000c0000e34b8 EFLAGS: 00000212 ORIG_RAX: 0000000000000102 [ 59.025475][ T6840] RAX: ffffffffffffffda RBX: 000000c00002c000 RCX: 00000000004b02a0 [ 59.033685][ T6840] RDX: 00000000000001c0 RSI: 000000c0000e6b20 RDI: ffffffffffffff9c [ 59.041698][ T6840] RBP: 000000c0000e3510 R08: 0000000000000000 R09: 0000000000000000 [ 59.049677][ T6840] R10: 0000000000000000 R11: 0000000000000212 R12: ffffffffffffffff [ 59.057627][ T6840] R13: 000000000000005a R14: 0000000000000059 R15: 0000000000000100 [ 59.074454][ T6858] BUG: using smp_processor_id() in preemptible [00000000] code: syz-executor.0/6858 [ 59.084040][ T6858] caller is ext4_mb_new_blocks+0xa4d/0x3b70 [ 59.090762][ T6858] CPU: 1 PID: 6858 Comm: syz-executor.0 Not tainted 5.7.0-syzkaller #0 [ 59.098985][ T6858] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 59.109234][ T6858] Call Trace: [ 59.112505][ T6858] dump_stack+0x18f/0x20d [ 59.116992][ T6858] check_preemption_disabled+0x20d/0x220 [ 59.122618][ T6858] ext4_mb_new_blocks+0xa4d/0x3b70 [ 59.127721][ T6858] ? ext4_ext_search_right+0x2ca/0xb20 [ 59.133169][ T6858] ? ext4_inode_to_goal_block+0x2df/0x3f0 [ 59.138870][ T6858] ext4_ext_map_blocks+0x201b/0x33e0 [ 59.144136][ T6858] ? ext4_ext_release+0x10/0x10 [ 59.148974][ T6858] ? down_write_killable+0x170/0x170 [ 59.154239][ T6858] ? ext4_es_lookup_extent+0x41d/0xd10 [ 59.159782][ T6858] ext4_map_blocks+0x4cb/0x1640 [ 59.164634][ T6858] ? ext4_issue_zeroout+0x1e0/0x1e0 [ 59.169820][ T6858] ? rcu_read_lock_sched_held+0x9c/0xd0 [ 59.175360][ T6858] ? rcu_read_lock_any_held.part.0+0x50/0x50 [ 59.181331][ T6858] ? prandom_u32_state+0xe/0x170 [ 59.186262][ T6858] ? __brelse+0x84/0xa0 [ 59.190396][ T6858] ? __ext4_new_inode+0x144/0x55e0 [ 59.195488][ T6858] ext4_getblk+0xad/0x520 [ 59.200428][ T6858] ? ext4_iomap_overwrite_begin+0xa0/0xa0 [ 59.207098][ T6858] ? ext4_free_inode+0x1700/0x1700 [ 59.212188][ T6858] ext4_bread+0x7c/0x380 [ 59.217017][ T6858] ? ext4_getblk+0x520/0x520 [ 59.221594][ T6858] ? dquot_get_next_dqblk+0x180/0x180 [ 59.226947][ T6858] ext4_append+0x153/0x360 [ 59.231359][ T6858] ext4_mkdir+0x5e0/0xdf0 [ 59.235669][ T6858] ? ext4_rmdir+0xde0/0xde0 [ 59.240421][ T6858] ? security_inode_permission+0xc4/0xf0 [ 59.246137][ T6858] vfs_mkdir+0x419/0x690 [ 59.250360][ T6858] do_mkdirat+0x21e/0x280 [ 59.254670][ T6858] ? __ia32_sys_mknod+0xb0/0xb0 [ 59.259515][ T6858] ? do_syscall_64+0x1c/0xe0 [ 59.264083][ T6858] ? lockdep_hardirqs_on_prepare+0x3a2/0x590 [ 59.270058][ T6858] do_syscall_64+0x60/0xe0 [ 59.274472][ T6858] entry_SYSCALL_64_after_hwframe+0x44/0xa9 [ 59.280340][ T6858] RIP: 0033:0x45bed7 [ 59.284206][ T6858] Code: Bad RIP value. [ 59.288248][ T6858] RSP: 002b:00007ffc692d2e48 EFLAGS: 00000246 ORIG_RAX: 0000000000000053 [ 59.296643][ T6858] RAX: ffffffffffffffda RBX: 000000000003a2f8 RCX: 000000000045bed7 [ 59.305043][ T6858] RDX: 0000000000000002 RSI: 00000000000001c0 RDI: 00007ffc692d3020 [ 59.312997][ T6858] RBP: 0000000000000001 R08: 000000000000f8c0 R09: 0000000000002a80 [ 59.320951][ T6858] R10: 0000000000000011 R11: 0000000000000246 R12: 00000000000000c2 [ 59.328931][ T6858] R13: 00007ffc692d3020 R14: 8421084210842109 R15: 00007ffc692d302c [ 59.413879][ T6859] IPVS: ftp: loaded support on port[0] = 21 [ 59.450601][ T6859] BUG: using smp_processor_id() in preemptible [00000000] code: syz-executor.0/6859 [ 59.460245][ T6859] caller is ext4_mb_new_blocks+0xa4d/0x3b70 [ 59.466120][ T6859] CPU: 0 PID: 6859 Comm: syz-executor.0 Not tainted 5.7.0-syzkaller #0 [ 59.474364][ T6859] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 59.484402][ T6859] Call Trace: [ 59.487706][ T6859] dump_stack+0x18f/0x20d [ 59.492023][ T6859] check_preemption_disabled+0x20d/0x220 [ 59.497660][ T6859] ext4_mb_new_blocks+0xa4d/0x3b70 [ 59.502759][ T6859] ? ext4_ext_search_right+0x2ca/0xb20 [ 59.508197][ T6859] ? ext4_inode_to_goal_block+0x2df/0x3f0 [ 59.513897][ T6859] ext4_ext_map_blocks+0x201b/0x33e0 [ 59.519166][ T6859] ? ext4_ext_release+0x10/0x10 [ 59.524006][ T6859] ? down_write_killable+0x170/0x170 [ 59.529529][ T6859] ? ext4_es_lookup_extent+0x41d/0xd10 [ 59.535164][ T6859] ext4_map_blocks+0x4cb/0x1640 [ 59.540098][ T6859] ? ext4_issue_zeroout+0x1e0/0x1e0 [ 59.545290][ T6859] ? rcu_read_lock_sched_held+0x9c/0xd0 [ 59.550922][ T6859] ? rcu_read_lock_any_held.part.0+0x50/0x50 [ 59.556878][ T6859] ? prandom_u32_state+0xe/0x170 [ 59.561794][ T6859] ? __brelse+0x84/0xa0 [ 59.565925][ T6859] ? __ext4_new_inode+0x144/0x55e0 [ 59.571034][ T6859] ext4_getblk+0xad/0x520 [ 59.575777][ T6859] ? ext4_iomap_overwrite_begin+0xa0/0xa0 [ 59.581562][ T6859] ? ext4_free_inode+0x1700/0x1700 [ 59.586650][ T6859] ext4_bread+0x7c/0x380 [ 59.590869][ T6859] ? ext4_getblk+0x520/0x520 [ 59.595441][ T6859] ? dquot_get_next_dqblk+0x180/0x180 [ 59.600895][ T6859] ext4_append+0x153/0x360 [ 59.605291][ T6859] ext4_mkdir+0x5e0/0xdf0 [ 59.610560][ T6859] ? ext4_rmdir+0xde0/0xde0 [ 59.615041][ T6859] ? security_inode_permission+0xc4/0xf0 [ 59.620671][ T6859] vfs_mkdir+0x419/0x690 [ 59.624891][ T6859] do_mkdirat+0x21e/0x280 [ 59.629460][ T6859] ? __ia32_sys_mknod+0xb0/0xb0 [ 59.634304][ T6859] ? do_syscall_64+0x1c/0xe0 [ 59.638872][ T6859] ? lockdep_hardirqs_on_prepare+0x3a2/0x590 [ 59.644847][ T6859] do_syscall_64+0x60/0xe0 [ 59.649256][ T6859] entry_SYSCALL_64_after_hwframe+0x44/0xa9 [ 59.655141][ T6859] RIP: 0033:0x45bed7 [ 59.659006][ T6859] Code: Bad RIP value. [ 59.663049][ T6859] RSP: 002b:00007ffc692d2d38 EFLAGS: 00000202 ORIG_RAX: 0000000000000053 [ 59.671437][ T6859] RAX: ffffffffffffffda RBX: 000000000078c988 RCX: 000000000045bed7 [ 59.679385][ T6859] RDX: 00007ffc692d2d83 RSI: 00000000000001ff RDI: 00007ffc692d2d80 [ 59.687334][ T6859] RBP: 00000000000000f8 R08: 0000000000000000 R09: 0000000000000003 [ 59.695296][ T6859] R10: 0000000000000064 R11: 0000000000000202 R12: 00000000004185c0 [ 59.703248][ T6859] R13: 00007ffc692d2d70 R14: 0000000000000000 R15: 00007ffc692d2d80 [ 59.756178][ T6859] BUG: using smp_processor_id() in preemptible [00000000] code: syz-executor.0/6859 [ 59.765712][ T6859] caller is ext4_mb_new_blocks+0xa4d/0x3b70 [ 59.772185][ T6859] CPU: 0 PID: 6859 Comm: syz-executor.0 Not tainted 5.7.0-syzkaller #0 [ 59.780503][ T6859] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 59.790557][ T6859] Call Trace: [ 59.793852][ T6859] dump_stack+0x18f/0x20d [ 59.798195][ T6859] check_preemption_disabled+0x20d/0x220 [ 59.803833][ T6859] ext4_mb_new_blocks+0xa4d/0x3b70 [ 59.812092][ T6859] ? ext4_ext_search_right+0x2ca/0xb20 [ 59.817562][ T6859] ? ext4_inode_to_goal_block+0x2df/0x3f0 [ 59.823301][ T6859] ext4_ext_map_blocks+0x201b/0x33e0 [ 59.828606][ T6859] ? ext4_ext_release+0x10/0x10 [ 59.833463][ T6859] ? down_write_killable+0x170/0x170 [ 59.838751][ T6859] ? ext4_es_lookup_extent+0x41d/0xd10 [ 59.844192][ T6859] ext4_map_blocks+0x4cb/0x1640 [ 59.849025][ T6859] ? ext4_issue_zeroout+0x1e0/0x1e0 [ 59.854202][ T6859] ? rcu_read_lock_sched_held+0x9c/0xd0 [ 59.859902][ T6859] ? rcu_read_lock_any_held.part.0+0x50/0x50 [ 59.865882][ T6859] ? prandom_u32_state+0xe/0x170 [ 59.870824][ T6859] ? __brelse+0x84/0xa0 [ 59.875083][ T6859] ? __ext4_new_inode+0x144/0x55e0 [ 59.880197][ T6859] ext4_getblk+0xad/0x520 [ 59.884623][ T6859] ? ext4_iomap_overwrite_begin+0xa0/0xa0 [ 59.890368][ T6859] ? ext4_free_inode+0x1700/0x1700 [ 59.895463][ T6859] ext4_bread+0x7c/0x380 [ 59.899684][ T6859] ? ext4_getblk+0x520/0x520 [ 59.904250][ T6859] ? dquot_get_next_dqblk+0x180/0x180 [ 59.909603][ T6859] ext4_append+0x153/0x360 [ 59.914015][ T6859] ext4_mkdir+0x5e0/0xdf0 [ 59.918326][ T6859] ? ext4_rmdir+0xde0/0xde0 [ 59.922807][ T6859] ? security_inode_permission+0xc4/0xf0 [ 59.928797][ T6859] vfs_mkdir+0x419/0x690 [ 59.933023][ T6859] do_mkdirat+0x21e/0x280 [ 59.937352][ T6859] ? __ia32_sys_mknod+0xb0/0xb0 [ 59.942203][ T6859] ? do_syscall_64+0x1c/0xe0 [ 59.946797][ T6859] ? lockdep_hardirqs_on_prepare+0x3a2/0x590 [ 59.952863][ T6859] do_syscall_64+0x60/0xe0 [ 59.957258][ T6859] entry_SYSCALL_64_after_hwframe+0x44/0xa9 [ 59.963127][ T6859] RIP: 0033:0x45bed7 [ 59.967010][ T6859] Code: Bad RIP value. [ 59.971050][ T6859] RSP: 002b:00007ffc692d2d38 EFLAGS: 00000202 ORIG_RAX: 0000000000000053 [ 59.979463][ T6859] RAX: ffffffffffffffda RBX: 000000000000e963 RCX: 000000000045bed7 [ 59.987688][ T6859] RDX: 00007ffc692d2d83 RSI: 00000000000001ff RDI: 00007ffc692d2d80 [ 59.995722][ T6859] RBP: 0000000000000002 R08: 0000000000000000 R09: 0000000000000003 2020/06/15 08:26:51 building call list... [ 60.003687][ T6859] R10: 0000000000000064 R11: 0000000000000202 R12: 0000000000000003 [ 60.011634][ T6859] R13: 00007ffc692d2d70 R14: 000000000000e953 R15: 00007ffc692d2d80 [ 60.296903][ T26] tipc: TX() has been purged, node left! [ 60.839044][ T26] ================================================================== [ 60.847260][ T26] BUG: KASAN: use-after-free in afs_wake_up_async_call+0x6aa/0x770 [ 60.855143][ T26] Write of size 1 at addr ffff8880a8cd79e4 by task kworker/u4:2/26 [ 60.863015][ T26] [ 60.865346][ T26] CPU: 1 PID: 26 Comm: kworker/u4:2 Not tainted 5.7.0-syzkaller #0 [ 60.873233][ T26] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 60.883292][ T26] Workqueue: netns cleanup_net [ 60.888044][ T26] Call Trace: [ 60.891359][ T26] dump_stack+0x18f/0x20d [ 60.895688][ T26] ? afs_wake_up_async_call+0x6aa/0x770 [ 60.901228][ T26] ? afs_wake_up_async_call+0x6aa/0x770 [ 60.906768][ T26] ? afs_put_call+0xa40/0xa40 [ 60.911446][ T26] print_address_description.constprop.0.cold+0xd3/0x413 [ 60.918740][ T26] ? vprintk_func+0x97/0x1a6 [ 60.923351][ T26] ? afs_wake_up_async_call+0x6aa/0x770 [ 60.928891][ T26] kasan_report.cold+0x1f/0x37 [ 60.933652][ T26] ? rcu_read_lock_held+0x81/0xb0 [ 60.938671][ T26] ? afs_wake_up_async_call+0x6aa/0x770 [ 60.944301][ T26] afs_wake_up_async_call+0x6aa/0x770 [ 60.949665][ T26] ? afs_close_socket+0x320/0x320 [ 60.954702][ T26] ? afs_put_call+0xa40/0xa40 [ 60.959382][ T26] rxrpc_notify_socket+0x1db/0x5d0 [ 60.964505][ T26] ? afs_put_call+0xa40/0xa40 [ 60.969193][ T26] __rxrpc_set_call_completion.part.0+0x172/0x410 [ 60.975615][ T26] rxrpc_call_completed+0xca/0xf0 [ 60.980646][ T26] rxrpc_discard_prealloc+0x781/0xab0 [ 60.986103][ T26] ? lock_sock_nested+0x94/0x110 [ 60.991073][ T26] rxrpc_listen+0x147/0x360 [ 60.995599][ T26] afs_close_socket+0x95/0x320 [ 61.000368][ T26] ? afs_purge_servers+0x16d/0x300 [ 61.005575][ T26] ? afs_rx_discard_new_call+0x50/0x50 [ 61.011038][ T26] ? init_wait_var_entry+0x200/0x200 [ 61.016329][ T26] ? rcu_read_lock_held_common+0xa0/0xa0 [ 61.021960][ T26] ? check_preemption_disabled+0x38/0x220 [ 61.027685][ T26] afs_net_exit+0x1bc/0x310 [ 61.032182][ T26] ? afs_net_init+0xe30/0xe30 [ 61.036859][ T26] ops_exit_list.isra.0+0xa8/0x150 [ 61.041975][ T26] cleanup_net+0x511/0xa50 [ 61.046385][ T26] ? unregister_pernet_device+0x70/0x70 [ 61.052000][ T26] ? rcu_read_lock_any_held.part.0+0x50/0x50 [ 61.057992][ T26] process_one_work+0x965/0x1690 [ 61.062940][ T26] ? lock_release+0x800/0x800 [ 61.067614][ T26] ? pwq_dec_nr_in_flight+0x310/0x310 [ 61.073094][ T26] ? rwlock_bug.part.0+0x90/0x90 [ 61.078043][ T26] worker_thread+0x96/0xe10 [ 61.082558][ T26] ? process_one_work+0x1690/0x1690 [ 61.087761][ T26] kthread+0x3b5/0x4a0 [ 61.091824][ T26] ? kthread_mod_delayed_work+0x1a0/0x1a0 [ 61.097626][ T26] ? kthread_mod_delayed_work+0x1a0/0x1a0 [ 61.103346][ T26] ret_from_fork+0x1f/0x30 [ 61.107768][ T26] [ 61.110097][ T26] Allocated by task 6859: [ 61.114422][ T26] save_stack+0x1b/0x40 [ 61.118573][ T26] __kasan_kmalloc.constprop.0+0xbf/0xd0 [ 61.124394][ T26] kmem_cache_alloc_trace+0x153/0x7d0 [ 61.129846][ T26] afs_alloc_call+0x55/0x630 [ 61.134441][ T26] afs_charge_preallocation+0xe9/0x2d0 [ 61.140180][ T26] afs_open_socket+0x292/0x360 [ 61.144943][ T26] afs_net_init+0xa6c/0xe30 [ 61.149440][ T26] ops_init+0xaf/0x420 [ 61.153503][ T26] setup_net+0x2de/0x860 [ 61.157738][ T26] copy_net_ns+0x293/0x590 [ 61.162148][ T26] create_new_namespaces+0x3fb/0xb30 [ 61.167429][ T26] unshare_nsproxy_namespaces+0xbd/0x1f0 [ 61.173055][ T26] ksys_unshare+0x43d/0x8e0 [ 61.177638][ T26] __x64_sys_unshare+0x2d/0x40 [ 61.182425][ T26] do_syscall_64+0x60/0xe0 [ 61.186856][ T26] entry_SYSCALL_64_after_hwframe+0x44/0xa9 [ 61.192733][ T26] [ 61.195056][ T26] Freed by task 26: [ 61.198861][ T26] save_stack+0x1b/0x40 [ 61.203015][ T26] __kasan_slab_free+0xf7/0x140 [ 61.207858][ T26] kfree+0x109/0x2b0 [ 61.211748][ T26] afs_put_call+0x585/0xa40 [ 61.216254][ T26] rxrpc_discard_prealloc+0x764/0xab0 [ 61.221622][ T26] rxrpc_listen+0x147/0x360 [ 61.226298][ T26] afs_close_socket+0x95/0x320 [ 61.231059][ T26] afs_net_exit+0x1bc/0x310 [ 61.235556][ T26] ops_exit_list.isra.0+0xa8/0x150 [ 61.240920][ T26] cleanup_net+0x511/0xa50 [ 61.245424][ T26] process_one_work+0x965/0x1690 [ 61.251225][ T26] worker_thread+0x96/0xe10 [ 61.255720][ T26] kthread+0x3b5/0x4a0 [ 61.259784][ T26] ret_from_fork+0x1f/0x30 [ 61.264210][ T26] [ 61.266533][ T26] The buggy address belongs to the object at ffff8880a8cd7800 [ 61.266533][ T26] which belongs to the cache kmalloc-1k of size 1024 [ 61.280855][ T26] The buggy address is located 484 bytes inside of [ 61.280855][ T26] 1024-byte region [ffff8880a8cd7800, ffff8880a8cd7c00) [ 61.294201][ T26] The buggy address belongs to the page: [ 61.299833][ T26] page:ffffea0002a335c0 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 [ 61.308932][ T26] flags: 0xfffe0000000200(slab) [ 61.315605][ T26] raw: 00fffe0000000200 ffffea000279b608 ffffea00024d4f08 ffff8880aa000c40 [ 61.324275][ T26] raw: 0000000000000000 ffff8880a8cd7000 0000000100000002 0000000000000000 [ 61.332858][ T26] page dumped because: kasan: bad access detected [ 61.339257][ T26] [ 61.341581][ T26] Memory state around the buggy address: [ 61.347206][ T26] ffff8880a8cd7880: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 61.355356][ T26] ffff8880a8cd7900: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 61.363413][ T26] >ffff8880a8cd7980: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 61.372876][ T26] ^ [ 61.380061][ T26] ffff8880a8cd7a00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 61.388117][ T26] ffff8880a8cd7a80: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 61.396166][ T26] ================================================================== [ 61.404225][ T26] Disabling lock debugging due to kernel taint [ 61.410501][ T26] Kernel panic - not syncing: panic_on_warn set ... [ 61.417083][ T26] CPU: 1 PID: 26 Comm: kworker/u4:2 Tainted: G B 5.7.0-syzkaller #0 [ 61.426345][ T26] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 61.436415][ T26] Workqueue: netns cleanup_net [ 61.441162][ T26] Call Trace: [ 61.444442][ T26] dump_stack+0x18f/0x20d [ 61.448766][ T26] ? afs_wake_up_async_call+0x5f0/0x770 [ 61.454300][ T26] ? afs_put_call+0xa40/0xa40 [ 61.458964][ T26] panic+0x2e3/0x75c [ 61.462849][ T26] ? __warn_printk+0xf3/0xf3 [ 61.467450][ T26] ? asm_sysvec_apic_timer_interrupt+0x12/0x20 [ 61.473683][ T26] ? trace_hardirqs_on+0x55/0x220 [ 61.478696][ T26] ? afs_wake_up_async_call+0x6aa/0x770 [ 61.484230][ T26] ? afs_wake_up_async_call+0x6aa/0x770 [ 61.489763][ T26] ? afs_put_call+0xa40/0xa40 [ 61.494429][ T26] end_report+0x4d/0x53 [ 61.498574][ T26] kasan_report.cold+0xd/0x37 [ 61.503250][ T26] ? rcu_read_lock_held+0x81/0xb0 [ 61.508352][ T26] ? afs_wake_up_async_call+0x6aa/0x770 [ 61.513884][ T26] afs_wake_up_async_call+0x6aa/0x770 [ 61.519241][ T26] ? afs_close_socket+0x320/0x320 [ 61.524258][ T26] ? afs_put_call+0xa40/0xa40 [ 61.529364][ T26] rxrpc_notify_socket+0x1db/0x5d0 [ 61.534468][ T26] ? afs_put_call+0xa40/0xa40 [ 61.539133][ T26] __rxrpc_set_call_completion.part.0+0x172/0x410 [ 61.545539][ T26] rxrpc_call_completed+0xca/0xf0 [ 61.550557][ T26] rxrpc_discard_prealloc+0x781/0xab0 [ 61.555928][ T26] ? lock_sock_nested+0x94/0x110 [ 61.560860][ T26] rxrpc_listen+0x147/0x360 [ 61.565357][ T26] afs_close_socket+0x95/0x320 [ 61.570112][ T26] ? afs_purge_servers+0x16d/0x300 [ 61.575220][ T26] ? afs_rx_discard_new_call+0x50/0x50 [ 61.580763][ T26] ? init_wait_var_entry+0x200/0x200 [ 61.586047][ T26] ? rcu_read_lock_held_common+0xa0/0xa0 [ 61.592375][ T26] ? check_preemption_disabled+0x38/0x220 [ 61.598090][ T26] afs_net_exit+0x1bc/0x310 [ 61.602624][ T26] ? afs_net_init+0xe30/0xe30 [ 61.606833][ T189] BUG: using smp_processor_id() in preemptible [00000000] code: kworker/u4:4/189 [ 61.607339][ T26] ops_exit_list.isra.0+0xa8/0x150 [ 61.616462][ T189] caller is ext4_mb_new_blocks+0xa4d/0x3b70 [ 61.621506][ T26] cleanup_net+0x511/0xa50 [ 61.631769][ T26] ? unregister_pernet_device+0x70/0x70 [ 61.637298][ T26] ? rcu_read_lock_any_held.part.0+0x50/0x50 [ 61.643262][ T26] process_one_work+0x965/0x1690 [ 61.648190][ T26] ? lock_release+0x800/0x800 [ 61.652844][ T26] ? pwq_dec_nr_in_flight+0x310/0x310 [ 61.658229][ T26] ? rwlock_bug.part.0+0x90/0x90 [ 61.663150][ T26] worker_thread+0x96/0xe10 [ 61.667633][ T26] ? process_one_work+0x1690/0x1690 [ 61.672807][ T26] kthread+0x3b5/0x4a0 [ 61.676854][ T26] ? kthread_mod_delayed_work+0x1a0/0x1a0 [ 61.682548][ T26] ? kthread_mod_delayed_work+0x1a0/0x1a0 [ 61.688607][ T26] ret_from_fork+0x1f/0x30 [ 61.693010][ T189] CPU: 0 PID: 189 Comm: kworker/u4:4 Tainted: G B 5.7.0-syzkaller #0 [ 61.702358][ T189] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 61.712400][ T189] Workqueue: writeback wb_workfn (flush-8:0) [ 61.718369][ T189] Call Trace: [ 61.721642][ T189] dump_stack+0x18f/0x20d [ 61.725956][ T189] check_preemption_disabled+0x20d/0x220 [ 61.731576][ T189] ext4_mb_new_blocks+0xa4d/0x3b70 [ 61.736675][ T189] ? ext4_find_extent+0x81a/0xad0 [ 61.741691][ T189] ? ext4_ext_search_right+0x2ca/0xb20 [ 61.747151][ T189] ? ext4_inode_to_goal_block+0x2df/0x3f0 [ 61.752853][ T189] ext4_ext_map_blocks+0x201b/0x33e0 [ 61.758120][ T189] ? ext4_ext_release+0x10/0x10 [ 61.762957][ T189] ? mpage_process_page_bufs+0x20f/0x760 [ 61.768572][ T189] ? down_write_killable+0x170/0x170 [ 61.773836][ T189] ? ext4_es_lookup_extent+0x41d/0xd10 [ 61.779274][ T189] ext4_map_blocks+0x4cb/0x1640 [ 61.784107][ T189] ? ext4_issue_zeroout+0x1e0/0x1e0 [ 61.789284][ T189] ? kmem_cache_alloc+0x307/0x740 [ 61.794376][ T189] ? ext4_alloc_io_end_vec+0x145/0x1c0 [ 61.799814][ T189] ext4_writepages+0x1a7b/0x33c0 [ 61.804742][ T189] ? __ext4_mark_inode_dirty+0x940/0x940 [ 61.810354][ T189] ? ext4_get_group_desc+0x298/0x500 [ 61.815619][ T189] ? __ext4_get_inode_loc+0x45f/0x12a0 [ 61.821063][ T189] ? lockdep_hardirqs_on_prepare+0x590/0x590 [ 61.827040][ T189] ? __ext4_mark_inode_dirty+0x940/0x940 [ 61.832696][ T189] ? do_writepages+0xfa/0x2a0 [ 61.837366][ T189] ? lock_acquire+0x1f2/0x8f0 [ 61.842031][ T189] do_writepages+0xfa/0x2a0 [ 61.846530][ T189] ? locked_inode_to_wb_and_lock_list+0x1b9/0x8f0 [ 61.852938][ T189] ? page_writeback_cpu_online+0x10/0x10 [ 61.858551][ T189] ? lock_downgrade+0x840/0x840 [ 61.863405][ T189] ? rwlock_bug.part.0+0x90/0x90 [ 61.869037][ T189] ? lock_downgrade+0x840/0x840 [ 61.873880][ T189] __writeback_single_inode+0x12a/0x13d0 [ 61.879498][ T189] ? _raw_spin_unlock+0x24/0x40 [ 61.884333][ T189] ? wbc_attach_and_unlock_inode+0x60a/0x9c0 [ 61.890294][ T189] writeback_sb_inodes+0x515/0xdc0 [ 61.895519][ T189] ? __writeback_single_inode+0x13d0/0x13d0 [ 61.901403][ T189] __writeback_inodes_wb+0xc3/0x250 [ 61.907817][ T189] wb_writeback+0x8db/0xd50 [ 61.912327][ T189] ? writeback_inodes_wb.constprop.0+0x1a0/0x1a0 [ 61.918651][ T189] ? cpumask_next+0x3c/0x40 [ 61.923135][ T189] ? get_nr_dirty_inodes+0xd6/0x130 [ 61.928315][ T189] wb_workfn+0x9bc/0x1090 [ 61.932632][ T189] ? inode_wait_for_writeback+0x30/0x30 [ 61.938177][ T189] ? read_word_at_a_time+0xe/0x20 [ 61.943183][ T189] process_one_work+0x965/0x1690 [ 61.948127][ T189] ? lock_release+0x800/0x800 [ 61.952783][ T189] ? pwq_dec_nr_in_flight+0x310/0x310 [ 61.958921][ T189] ? rwlock_bug.part.0+0x90/0x90 [ 61.963862][ T189] worker_thread+0x96/0xe10 [ 61.968366][ T189] ? process_one_work+0x1690/0x1690 [ 61.973562][ T189] kthread+0x3b5/0x4a0 [ 61.977621][ T189] ? kthread_mod_delayed_work+0x1a0/0x1a0 [ 61.983329][ T189] ? kthread_mod_delayed_work+0x1a0/0x1a0 [ 61.989107][ T189] ret_from_fork+0x1f/0x30 [ 61.994808][ T26] Kernel Offset: disabled [ 61.999316][ T26] Rebooting in 86400 seconds..