[ 59.833735][ T26] ? __ext4_mark_inode_dirty+0x940/0x940 [ 59.839411][ T26] ? do_writepages+0xfa/0x2a0 [ 59.844103][ T26] do_writepages+0xfa/0x2a0 [ 59.848630][ T26] ? page_writeback_cpu_online+0x10/0x10 [ 59.854285][ T26] ? rcu_read_lock_sched_held+0x9c/0xd0 [ 59.859844][ T26] ? rcu_read_lock_any_held.part.0+0x50/0x50 [ 59.865836][ T26] ? lock_downgrade+0x840/0x840 [ 59.870798][ T26] __writeback_single_inode+0x12a/0x13d0 [ 59.876461][ T26] ? _raw_spin_unlock+0x24/0x40 [ 59.881327][ T26] ? wbc_attach_and_unlock_inode+0x60a/0x9c0 [ 59.887321][ T26] writeback_sb_inodes+0x515/0xdc0 [ 59.892487][ T26] ? __writeback_single_inode+0x13d0/0x13d0 [ 59.898422][ T26] __writeback_inodes_wb+0xc3/0x250 [ 59.903646][ T26] wb_writeback+0x8db/0xd50 [ 59.908176][ T26] ? writeback_inodes_wb.constprop.0+0x1a0/0x1a0 [ 59.914606][ T26] ? _find_next_bit.constprop.0+0x1a3/0x200 [ 59.920521][ T26] ? cpumask_next+0x3c/0x40 [ 59.925041][ T26] ? get_nr_dirty_inodes+0xd6/0x130 [ 59.930264][ T26] wb_workfn+0xab3/0x1090 [ 59.934615][ T26] ? inode_wait_for_writeback+0x30/0x30 [ 59.940181][ T26] ? rcu_read_lock_sched_held+0x9c/0xd0 [ 59.945745][ T26] ? rcu_read_lock_any_held.part.0+0x50/0x50 [ 59.951742][ T26] process_one_work+0x965/0x1690 [ 59.956701][ T26] ? lock_release+0x800/0x800 [ 59.961391][ T26] ? pwq_dec_nr_in_flight+0x310/0x310 [ 59.966789][ T26] ? rwlock_bug.part.0+0x90/0x90 [ 59.971758][ T26] worker_thread+0x96/0xe10 [ 59.976289][ T26] ? process_one_work+0x1690/0x1690 [ 59.981503][ T26] kthread+0x3b5/0x4a0 [ 59.985585][ T26] ? kthread_mod_delayed_work+0x1a0/0x1a0 [ 59.991309][ T26] ? kthread_mod_delayed_work+0x1a0/0x1a0 [ 59.997047][ T26] ret_from_fork+0x1f/0x30 Warning: Permanently added '10.128.0.253' (ECDSA) to the list of known hosts. 2020/06/17 05:10:41 fuzzer started 2020/06/17 05:10:41 connecting to host at 10.128.0.26:42939 2020/06/17 05:10:41 checking machine... 2020/06/17 05:10:41 checking revisions... 2020/06/17 05:10:41 testing simple program... [ 65.656527][ T6794] BUG: using smp_processor_id() in preemptible [00000000] code: syz-fuzzer/6794 [ 65.665645][ T6794] caller is ext4_mb_new_blocks+0xa4d/0x3b70 [ 65.671633][ T6794] CPU: 0 PID: 6794 Comm: syz-fuzzer Not tainted 5.8.0-rc1-syzkaller #0 [ 65.679956][ T6794] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 65.689999][ T6794] Call Trace: [ 65.693285][ T6794] dump_stack+0x18f/0x20d [ 65.697610][ T6794] check_preemption_disabled+0x20d/0x220 [ 65.703234][ T6794] ext4_mb_new_blocks+0xa4d/0x3b70 [ 65.708329][ T6794] ? ext4_ext_search_right+0x2ca/0xb20 [ 65.713769][ T6794] ? ext4_inode_to_goal_block+0x2df/0x3f0 [ 65.719472][ T6794] ext4_ext_map_blocks+0x201b/0x33e0 [ 65.724905][ T6794] ? ext4_ext_release+0x10/0x10 [ 65.729753][ T6794] ? down_write_killable+0x170/0x170 [ 65.735123][ T6794] ? ext4_es_lookup_extent+0x41d/0xd10 [ 65.740578][ T6794] ext4_map_blocks+0x4cb/0x1640 [ 65.745424][ T6794] ? ext4_issue_zeroout+0x1e0/0x1e0 [ 65.750606][ T6794] ? rcu_read_lock_sched_held+0x9c/0xd0 [ 65.756303][ T6794] ? rcu_read_lock_any_held.part.0+0x50/0x50 [ 65.762275][ T6794] ? prandom_u32_state+0xe/0x170 [ 65.767441][ T6794] ? __brelse+0x84/0xa0 [ 65.771582][ T6794] ? __ext4_new_inode+0x144/0x55e0 [ 65.776683][ T6794] ext4_getblk+0xad/0x520 [ 65.781108][ T6794] ? ext4_iomap_overwrite_begin+0xa0/0xa0 [ 65.786860][ T6794] ? ext4_free_inode+0x1700/0x1700 [ 65.791980][ T6794] ext4_bread+0x7c/0x380 [ 65.796216][ T6794] ? ext4_getblk+0x520/0x520 [ 65.801671][ T6794] ? dquot_get_next_dqblk+0x180/0x180 [ 65.807039][ T6794] ext4_append+0x153/0x360 [ 65.811464][ T6794] ext4_mkdir+0x5e0/0xdf0 [ 65.815783][ T6794] ? ext4_rmdir+0xde0/0xde0 [ 65.820267][ T6794] ? security_inode_permission+0xc4/0xf0 [ 65.825892][ T6794] vfs_mkdir+0x419/0x690 [ 65.830125][ T6794] do_mkdirat+0x21e/0x280 [ 65.834458][ T6794] ? __ia32_sys_mknod+0xb0/0xb0 [ 65.839298][ T6794] ? do_syscall_64+0x1c/0xe0 [ 65.843888][ T6794] ? lockdep_hardirqs_on_prepare+0x3a2/0x590 [ 65.849863][ T6794] do_syscall_64+0x60/0xe0 [ 65.854282][ T6794] entry_SYSCALL_64_after_hwframe+0x44/0xa9 [ 65.860150][ T6794] RIP: 0033:0x4b02a0 [ 65.864048][ T6794] Code: Bad RIP value. [ 65.868089][ T6794] RSP: 002b:000000c0000e34b8 EFLAGS: 00000212 ORIG_RAX: 0000000000000102 [ 65.876489][ T6794] RAX: ffffffffffffffda RBX: 000000c00002c000 RCX: 00000000004b02a0 [ 65.884459][ T6794] RDX: 00000000000001c0 RSI: 000000c00009ec60 RDI: ffffffffffffff9c [ 65.892409][ T6794] RBP: 000000c0000e3510 R08: 0000000000000000 R09: 0000000000000000 [ 65.900386][ T6794] R10: 0000000000000000 R11: 0000000000000212 R12: ffffffffffffffff [ 65.908359][ T6794] R13: 0000000000000064 R14: 0000000000000063 R15: 0000000000000100 [ 65.925063][ T6807] BUG: using smp_processor_id() in preemptible [00000000] code: syz-executor.0/6807 [ 65.934570][ T6807] caller is ext4_mb_new_blocks+0xa4d/0x3b70 [ 65.940479][ T6807] CPU: 0 PID: 6807 Comm: syz-executor.0 Not tainted 5.8.0-rc1-syzkaller #0 [ 65.949053][ T6807] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 65.959089][ T6807] Call Trace: [ 65.962365][ T6807] dump_stack+0x18f/0x20d [ 65.966690][ T6807] check_preemption_disabled+0x20d/0x220 [ 65.972303][ T6807] ext4_mb_new_blocks+0xa4d/0x3b70 [ 65.977400][ T6807] ? ext4_ext_search_right+0x2ca/0xb20 [ 65.982839][ T6807] ? ext4_inode_to_goal_block+0x2df/0x3f0 [ 65.988889][ T6807] ext4_ext_map_blocks+0x201b/0x33e0 [ 65.994168][ T6807] ? ext4_ext_release+0x10/0x10 [ 65.999020][ T6807] ? down_write_killable+0x170/0x170 [ 66.004309][ T6807] ? ext4_es_lookup_extent+0x41d/0xd10 [ 66.009758][ T6807] ext4_map_blocks+0x4cb/0x1640 [ 66.014606][ T6807] ? ext4_issue_zeroout+0x1e0/0x1e0 [ 66.019791][ T6807] ? rcu_read_lock_sched_held+0x9c/0xd0 [ 66.025325][ T6807] ? rcu_read_lock_any_held.part.0+0x50/0x50 [ 66.031460][ T6807] ? prandom_u32_state+0xe/0x170 [ 66.036376][ T6807] ? __brelse+0x84/0xa0 [ 66.040520][ T6807] ? __ext4_new_inode+0x144/0x55e0 [ 66.045615][ T6807] ext4_getblk+0xad/0x520 [ 66.049923][ T6807] ? ext4_iomap_overwrite_begin+0xa0/0xa0 [ 66.055635][ T6807] ? ext4_free_inode+0x1700/0x1700 [ 66.060735][ T6807] ext4_bread+0x7c/0x380 [ 66.064962][ T6807] ? ext4_getblk+0x520/0x520 [ 66.069530][ T6807] ? dquot_get_next_dqblk+0x180/0x180 [ 66.074884][ T6807] ext4_append+0x153/0x360 [ 66.079284][ T6807] ext4_mkdir+0x5e0/0xdf0 [ 66.083600][ T6807] ? ext4_rmdir+0xde0/0xde0 [ 66.088086][ T6807] ? security_inode_permission+0xc4/0xf0 [ 66.093700][ T6807] vfs_mkdir+0x419/0x690 [ 66.097935][ T6807] do_mkdirat+0x21e/0x280 [ 66.102346][ T6807] ? __ia32_sys_mknod+0xb0/0xb0 [ 66.107183][ T6807] ? do_syscall_64+0x1c/0xe0 [ 66.111752][ T6807] ? lockdep_hardirqs_on_prepare+0x3a2/0x590 [ 66.117709][ T6807] do_syscall_64+0x60/0xe0 [ 66.122158][ T6807] entry_SYSCALL_64_after_hwframe+0x44/0xa9 [ 66.128060][ T6807] RIP: 0033:0x45bed7 [ 66.131946][ T6807] Code: Bad RIP value. [ 66.135997][ T6807] RSP: 002b:00007ffff9ae1b08 EFLAGS: 00000246 ORIG_RAX: 0000000000000053 [ 66.144405][ T6807] RAX: ffffffffffffffda RBX: 000000000003a2f8 RCX: 000000000045bed7 [ 66.152370][ T6807] RDX: 0000000000000002 RSI: 00000000000001c0 RDI: 00007ffff9ae1ce0 [ 66.160328][ T6807] RBP: 0000000000000001 R08: 000000000000f8c0 R09: 0000000000002d40 [ 66.168290][ T6807] R10: 0000000000000011 R11: 0000000000000246 R12: 00000000000000c2 [ 66.176258][ T6807] R13: 00007ffff9ae1ce0 R14: 8421084210842109 R15: 00007ffff9ae1cec [ 66.264775][ T6808] IPVS: ftp: loaded support on port[0] = 21 [ 66.302472][ T6808] BUG: using smp_processor_id() in preemptible [00000000] code: syz-executor.0/6808 [ 66.312247][ T6808] caller is ext4_mb_new_blocks+0xa4d/0x3b70 [ 66.318209][ T6808] CPU: 1 PID: 6808 Comm: syz-executor.0 Not tainted 5.8.0-rc1-syzkaller #0 [ 66.326801][ T6808] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 66.336863][ T6808] Call Trace: [ 66.340160][ T6808] dump_stack+0x18f/0x20d [ 66.344474][ T6808] check_preemption_disabled+0x20d/0x220 [ 66.350086][ T6808] ext4_mb_new_blocks+0xa4d/0x3b70 [ 66.355185][ T6808] ? ext4_ext_search_right+0x2ca/0xb20 [ 66.360635][ T6808] ? ext4_inode_to_goal_block+0x2df/0x3f0 [ 66.366336][ T6808] ext4_ext_map_blocks+0x201b/0x33e0 [ 66.371706][ T6808] ? ext4_ext_release+0x10/0x10 [ 66.376556][ T6808] ? down_write_killable+0x170/0x170 [ 66.381832][ T6808] ? ext4_es_lookup_extent+0x41d/0xd10 [ 66.387271][ T6808] ext4_map_blocks+0x4cb/0x1640 [ 66.392104][ T6808] ? ext4_issue_zeroout+0x1e0/0x1e0 [ 66.397304][ T6808] ? rcu_read_lock_sched_held+0x9c/0xd0 [ 66.402826][ T6808] ? rcu_read_lock_any_held.part.0+0x50/0x50 [ 66.408780][ T6808] ? prandom_u32_state+0xe/0x170 [ 66.413694][ T6808] ? __brelse+0x84/0xa0 [ 66.417844][ T6808] ? __ext4_new_inode+0x144/0x55e0 [ 66.423060][ T6808] ext4_getblk+0xad/0x520 [ 66.427455][ T6808] ? ext4_iomap_overwrite_begin+0xa0/0xa0 [ 66.433171][ T6808] ? ext4_free_inode+0x1700/0x1700 [ 66.438275][ T6808] ext4_bread+0x7c/0x380 [ 66.442496][ T6808] ? ext4_getblk+0x520/0x520 [ 66.447063][ T6808] ? dquot_get_next_dqblk+0x180/0x180 [ 66.452418][ T6808] ext4_append+0x153/0x360 [ 66.456815][ T6808] ext4_mkdir+0x5e0/0xdf0 [ 66.461128][ T6808] ? ext4_rmdir+0xde0/0xde0 [ 66.465614][ T6808] ? security_inode_permission+0xc4/0xf0 [ 66.471238][ T6808] vfs_mkdir+0x419/0x690 [ 66.475482][ T6808] do_mkdirat+0x21e/0x280 [ 66.479790][ T6808] ? __ia32_sys_mknod+0xb0/0xb0 [ 66.484619][ T6808] ? do_syscall_64+0x1c/0xe0 [ 66.489186][ T6808] ? lockdep_hardirqs_on_prepare+0x3a2/0x590 [ 66.495146][ T6808] do_syscall_64+0x60/0xe0 [ 66.499541][ T6808] entry_SYSCALL_64_after_hwframe+0x44/0xa9 [ 66.505411][ T6808] RIP: 0033:0x45bed7 [ 66.509279][ T6808] Code: Bad RIP value. [ 66.513335][ T6808] RSP: 002b:00007ffff9ae19f8 EFLAGS: 00000202 ORIG_RAX: 0000000000000053 [ 66.521722][ T6808] RAX: ffffffffffffffda RBX: 000000000078c988 RCX: 000000000045bed7 [ 66.529765][ T6808] RDX: 00007ffff9ae1a43 RSI: 00000000000001ff RDI: 00007ffff9ae1a40 [ 66.537742][ T6808] RBP: 00000000000000f8 R08: 0000000000000000 R09: 0000000000000003 [ 66.545705][ T6808] R10: 0000000000000064 R11: 0000000000000202 R12: 00000000004185c0 [ 66.553814][ T6808] R13: 00007ffff9ae1a30 R14: 0000000000000000 R15: 00007ffff9ae1a40 [ 66.606982][ T6808] BUG: using smp_processor_id() in preemptible [00000000] code: syz-executor.0/6808 [ 66.616527][ T6808] caller is ext4_mb_new_blocks+0xa4d/0x3b70 [ 66.622541][ T6808] CPU: 1 PID: 6808 Comm: syz-executor.0 Not tainted 5.8.0-rc1-syzkaller #0 [ 66.631136][ T6808] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 66.641190][ T6808] Call Trace: [ 66.644578][ T6808] dump_stack+0x18f/0x20d [ 66.648933][ T6808] check_preemption_disabled+0x20d/0x220 [ 66.654592][ T6808] ext4_mb_new_blocks+0xa4d/0x3b70 [ 66.659726][ T6808] ? ext4_ext_search_right+0x2ca/0xb20 [ 66.665195][ T6808] ? ext4_inode_to_goal_block+0x2df/0x3f0 [ 66.670958][ T6808] ext4_ext_map_blocks+0x201b/0x33e0 [ 66.676273][ T6808] ? ext4_ext_release+0x10/0x10 [ 66.681153][ T6808] ? down_write_killable+0x170/0x170 [ 66.686441][ T6808] ? ext4_es_lookup_extent+0x41d/0xd10 [ 66.691928][ T6808] ext4_map_blocks+0x4cb/0x1640 [ 66.696805][ T6808] ? ext4_issue_zeroout+0x1e0/0x1e0 [ 66.702008][ T6808] ? rcu_read_lock_sched_held+0x9c/0xd0 [ 66.708002][ T6808] ? rcu_read_lock_any_held.part.0+0x50/0x50 [ 66.713991][ T6808] ? prandom_u32_state+0xe/0x170 [ 66.718913][ T6808] ? __brelse+0x84/0xa0 [ 66.723174][ T6808] ? __ext4_new_inode+0x144/0x55e0 [ 66.728345][ T6808] ext4_getblk+0xad/0x520 [ 66.732666][ T6808] ? ext4_iomap_overwrite_begin+0xa0/0xa0 [ 66.738387][ T6808] ? ext4_free_inode+0x1700/0x1700 [ 66.743479][ T6808] ext4_bread+0x7c/0x380 [ 66.747715][ T6808] ? ext4_getblk+0x520/0x520 [ 66.752305][ T6808] ? dquot_get_next_dqblk+0x180/0x180 [ 66.757662][ T6808] ext4_append+0x153/0x360 [ 66.762062][ T6808] ext4_mkdir+0x5e0/0xdf0 [ 66.766372][ T6808] ? ext4_rmdir+0xde0/0xde0 [ 66.770863][ T6808] ? security_inode_permission+0xc4/0xf0 [ 66.776497][ T6808] vfs_mkdir+0x419/0x690 [ 66.780731][ T6808] do_mkdirat+0x21e/0x280 [ 66.785044][ T6808] ? __ia32_sys_mknod+0xb0/0xb0 [ 66.789882][ T6808] ? do_syscall_64+0x1c/0xe0 [ 66.794451][ T6808] ? lockdep_hardirqs_on_prepare+0x3a2/0x590 [ 66.800413][ T6808] do_syscall_64+0x60/0xe0 [ 66.804813][ T6808] entry_SYSCALL_64_after_hwframe+0x44/0xa9 [ 66.810681][ T6808] RIP: 0033:0x45bed7 [ 66.814637][ T6808] Code: Bad RIP value. [ 66.818688][ T6808] RSP: 002b:00007ffff9ae19f8 EFLAGS: 00000202 ORIG_RAX: 0000000000000053 [ 66.827160][ T6808] RAX: ffffffffffffffda RBX: 000000000001042a RCX: 000000000045bed7 [ 66.835121][ T6808] RDX: 00007ffff9ae1a43 RSI: 00000000000001ff RDI: 00007ffff9ae1a40 [ 66.843083][ T6808] RBP: 0000000000000002 R08: 0000000000000000 R09: 0000000000000003 2020/06/17 05:10:43 building call list... [ 66.851043][ T6808] R10: 0000000000000064 R11: 0000000000000202 R12: 0000000000000003 [ 66.859698][ T6808] R13: 00007ffff9ae1a30 R14: 0000000000010424 R15: 00007ffff9ae1a40 [ 67.091664][ T7] tipc: TX() has been purged, node left! [ 67.603714][ T7] ================================================================== [ 67.611972][ T7] BUG: KASAN: use-after-free in afs_wake_up_async_call+0x6aa/0x770 [ 67.619880][ T7] Write of size 1 at addr ffff8880a43991e4 by task kworker/u4:0/7 [ 67.627669][ T7] [ 67.629998][ T7] CPU: 0 PID: 7 Comm: kworker/u4:0 Not tainted 5.8.0-rc1-syzkaller #0 [ 67.638223][ T7] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 67.648290][ T7] Workqueue: netns cleanup_net [ 67.653055][ T7] Call Trace: [ 67.656348][ T7] dump_stack+0x18f/0x20d [ 67.660676][ T7] ? afs_wake_up_async_call+0x6aa/0x770 [ 67.666217][ T7] ? afs_wake_up_async_call+0x6aa/0x770 [ 67.671763][ T7] ? afs_put_call+0xa40/0xa40 [ 67.676439][ T7] print_address_description.constprop.0.cold+0xd3/0x413 [ 67.683464][ T7] ? vprintk_func+0x97/0x1a6 [ 67.688054][ T7] ? afs_wake_up_async_call+0x6aa/0x770 [ 67.694550][ T7] kasan_report.cold+0x1f/0x37 [ 67.699314][ T7] ? rcu_read_lock_held_common+0x51/0xa0 [ 67.704941][ T7] ? afs_wake_up_async_call+0x6aa/0x770 [ 67.710485][ T7] afs_wake_up_async_call+0x6aa/0x770 [ 67.715849][ T7] ? afs_close_socket+0x320/0x320 [ 67.720880][ T7] ? afs_put_call+0xa40/0xa40 [ 67.725556][ T7] rxrpc_notify_socket+0x1db/0x5d0 [ 67.730671][ T7] ? afs_put_call+0xa40/0xa40 [ 67.735348][ T7] __rxrpc_set_call_completion.part.0+0x172/0x410 [ 67.742111][ T7] rxrpc_call_completed+0xca/0xf0 [ 67.747138][ T7] rxrpc_discard_prealloc+0x781/0xab0 [ 67.752607][ T7] ? lock_sock_nested+0x94/0x110 [ 67.757546][ T7] rxrpc_listen+0x147/0x360 [ 67.762048][ T7] afs_close_socket+0x95/0x320 [ 67.766816][ T7] ? afs_purge_servers+0x16d/0x300 [ 67.771929][ T7] ? afs_rx_discard_new_call+0x50/0x50 [ 67.777912][ T7] ? init_wait_var_entry+0x200/0x200 [ 67.783198][ T7] ? rcu_read_lock_held_common+0xa0/0xa0 [ 67.788827][ T7] ? check_preemption_disabled+0x38/0x220 [ 67.794552][ T7] afs_net_exit+0x1bc/0x310 [ 67.799049][ T7] ? afs_net_init+0xe30/0xe30 [ 67.803897][ T7] ops_exit_list.isra.0+0xa8/0x150 [ 67.809009][ T7] cleanup_net+0x511/0xa50 [ 67.813430][ T7] ? unregister_pernet_device+0x70/0x70 [ 67.818978][ T7] ? rcu_read_lock_any_held.part.0+0x50/0x50 [ 67.824973][ T7] process_one_work+0x965/0x1690 [ 67.829920][ T7] ? lock_release+0x800/0x800 [ 67.834599][ T7] ? pwq_dec_nr_in_flight+0x310/0x310 [ 67.839979][ T7] ? rwlock_bug.part.0+0x90/0x90 [ 67.844927][ T7] worker_thread+0x96/0xe10 [ 67.849444][ T7] ? process_one_work+0x1690/0x1690 [ 67.854657][ T7] kthread+0x3b5/0x4a0 [ 67.858725][ T7] ? kthread_mod_delayed_work+0x1a0/0x1a0 [ 67.864441][ T7] ? kthread_mod_delayed_work+0x1a0/0x1a0 [ 67.870176][ T7] ret_from_fork+0x1f/0x30 [ 67.874621][ T7] [ 67.876943][ T7] Allocated by task 6808: [ 67.881267][ T7] save_stack+0x1b/0x40 [ 67.885422][ T7] __kasan_kmalloc.constprop.0+0xbf/0xd0 [ 67.891047][ T7] kmem_cache_alloc_trace+0x153/0x7d0 [ 67.896411][ T7] afs_alloc_call+0x55/0x630 [ 67.900994][ T7] afs_charge_preallocation+0xe9/0x2d0 [ 67.906444][ T7] afs_open_socket+0x292/0x360 [ 67.911200][ T7] afs_net_init+0xa6c/0xe30 [ 67.915694][ T7] ops_init+0xaf/0x420 [ 67.920360][ T7] setup_net+0x2de/0x860 [ 67.924595][ T7] copy_net_ns+0x293/0x590 [ 67.929006][ T7] create_new_namespaces+0x3fb/0xb30 [ 67.934300][ T7] unshare_nsproxy_namespaces+0xbd/0x1f0 [ 67.939924][ T7] ksys_unshare+0x43d/0x8e0 [ 67.944421][ T7] __x64_sys_unshare+0x2d/0x40 [ 67.949179][ T7] do_syscall_64+0x60/0xe0 [ 67.953600][ T7] entry_SYSCALL_64_after_hwframe+0x44/0xa9 [ 67.959475][ T7] [ 67.961795][ T7] Freed by task 7: [ 67.965538][ T7] save_stack+0x1b/0x40 [ 67.969690][ T7] __kasan_slab_free+0xf7/0x140 [ 67.974550][ T7] kfree+0x109/0x2b0 [ 67.978457][ T7] afs_put_call+0x585/0xa40 [ 67.982972][ T7] rxrpc_discard_prealloc+0x764/0xab0 [ 67.988352][ T7] rxrpc_listen+0x147/0x360 [ 67.992858][ T7] afs_close_socket+0x95/0x320 [ 67.997614][ T7] afs_net_exit+0x1bc/0x310 [ 68.002110][ T7] ops_exit_list.isra.0+0xa8/0x150 [ 68.007213][ T7] cleanup_net+0x511/0xa50 [ 68.011624][ T7] process_one_work+0x965/0x1690 [ 68.016571][ T7] worker_thread+0x96/0xe10 [ 68.021067][ T7] kthread+0x3b5/0x4a0 [ 68.025132][ T7] ret_from_fork+0x1f/0x30 [ 68.029539][ T7] [ 68.031871][ T7] The buggy address belongs to the object at ffff8880a4399000 [ 68.031871][ T7] which belongs to the cache kmalloc-1k of size 1024 [ 68.045930][ T7] The buggy address is located 484 bytes inside of [ 68.045930][ T7] 1024-byte region [ffff8880a4399000, ffff8880a4399400) [ 68.059296][ T7] The buggy address belongs to the page: [ 68.064949][ T7] page:ffffea000290e640 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 [ 68.074133][ T7] flags: 0xfffe0000000200(slab) [ 68.078988][ T7] raw: 00fffe0000000200 ffffea00025e2088 ffffea00029d4688 ffff8880aa000c40 [ 68.087659][ T7] raw: 0000000000000000 ffff8880a4399000 0000000100000002 0000000000000000 [ 68.096236][ T7] page dumped because: kasan: bad access detected [ 68.102653][ T7] [ 68.104974][ T7] Memory state around the buggy address: [ 68.110686][ T7] ffff8880a4399080: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 68.119874][ T7] ffff8880a4399100: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 68.128627][ T7] >ffff8880a4399180: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 68.136677][ T7] ^ [ 68.143865][ T7] ffff8880a4399200: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 68.151920][ T7] ffff8880a4399280: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 68.159989][ T7] ================================================================== [ 68.168038][ T7] Disabling lock debugging due to kernel taint [ 68.174237][ T7] Kernel panic - not syncing: panic_on_warn set ... [ 68.181261][ T7] CPU: 0 PID: 7 Comm: kworker/u4:0 Tainted: G B 5.8.0-rc1-syzkaller #0 [ 68.190795][ T7] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 68.200876][ T7] Workqueue: netns cleanup_net [ 68.205634][ T7] Call Trace: [ 68.208931][ T7] dump_stack+0x18f/0x20d [ 68.213274][ T7] ? afs_wake_up_async_call+0x670/0x770 [ 68.218820][ T7] ? afs_put_call+0xa40/0xa40 [ 68.223505][ T7] panic+0x2e3/0x75c [ 68.227425][ T7] ? __warn_printk+0xf3/0xf3 [ 68.232194][ T7] ? asm_sysvec_apic_timer_interrupt+0x12/0x20 [ 68.238369][ T7] ? trace_hardirqs_on+0x55/0x220 [ 68.243380][ T7] ? afs_wake_up_async_call+0x6aa/0x770 [ 68.248904][ T7] ? afs_wake_up_async_call+0x6aa/0x770 [ 68.254434][ T7] ? afs_put_call+0xa40/0xa40 [ 68.259101][ T7] end_report+0x4d/0x53 [ 68.263262][ T7] kasan_report.cold+0xd/0x37 [ 68.267944][ T7] ? rcu_read_lock_held_common+0x51/0xa0 [ 68.273580][ T7] ? afs_wake_up_async_call+0x6aa/0x770 [ 68.280162][ T7] afs_wake_up_async_call+0x6aa/0x770 [ 68.285587][ T7] ? afs_close_socket+0x320/0x320 [ 68.290616][ T7] ? afs_put_call+0xa40/0xa40 [ 68.295302][ T7] rxrpc_notify_socket+0x1db/0x5d0 [ 68.300392][ T7] ? afs_put_call+0xa40/0xa40 [ 68.305154][ T7] __rxrpc_set_call_completion.part.0+0x172/0x410 [ 68.311574][ T7] rxrpc_call_completed+0xca/0xf0 [ 68.316588][ T7] rxrpc_discard_prealloc+0x781/0xab0 [ 68.322058][ T7] ? lock_sock_nested+0x94/0x110 [ 68.326995][ T7] rxrpc_listen+0x147/0x360 [ 68.331495][ T7] afs_close_socket+0x95/0x320 [ 68.336694][ T7] ? afs_purge_servers+0x16d/0x300 [ 68.341798][ T7] ? afs_rx_discard_new_call+0x50/0x50 [ 68.347251][ T7] ? init_wait_var_entry+0x200/0x200 [ 68.352532][ T7] ? rcu_read_lock_held_common+0xa0/0xa0 [ 68.358169][ T7] ? check_preemption_disabled+0x38/0x220 [ 68.363875][ T7] afs_net_exit+0x1bc/0x310 [ 68.368457][ T7] ? afs_net_init+0xe30/0xe30 [ 68.373130][ T7] ops_exit_list.isra.0+0xa8/0x150 [ 68.378223][ T7] cleanup_net+0x511/0xa50 [ 68.382626][ T7] ? unregister_pernet_device+0x70/0x70 [ 68.388163][ T7] ? rcu_read_lock_any_held.part.0+0x50/0x50 [ 68.394148][ T7] process_one_work+0x965/0x1690 [ 68.399085][ T7] ? lock_release+0x800/0x800 [ 68.403820][ T7] ? pwq_dec_nr_in_flight+0x310/0x310 [ 68.409334][ T7] ? rwlock_bug.part.0+0x90/0x90 [ 68.414359][ T7] worker_thread+0x96/0xe10 [ 68.418876][ T7] ? process_one_work+0x1690/0x1690 [ 68.424192][ T7] kthread+0x3b5/0x4a0 [ 68.428403][ T7] ? kthread_mod_delayed_work+0x1a0/0x1a0 [ 68.434120][ T7] ? kthread_mod_delayed_work+0x1a0/0x1a0 [ 68.439885][ T7] ret_from_fork+0x1f/0x30 [ 68.445547][ T7] Kernel Offset: disabled [ 68.449881][ T7] Rebooting in 86400 seconds..