syzkaller login: [ 260.450703][ T40] audit: type=1400 audit(1592154969.398:41): avc: denied { map } for pid=12680 comm="bash" path="/bin/bash" dev="sda1" ino=1457 scontext=unconfined_u:system_r:insmod_t:s0-s0:c0.c1023 tcontext=system_u:object_r:file_t:s0 tclass=file permissive=1 Warning: Permanently added '[localhost]:16044' (ECDSA) to the list of known hosts. [ 263.964200][ T40] audit: type=1400 audit(1592154972.908:42): avc: denied { map } for pid=12690 comm="syz-fuzzer" path="/syz-fuzzer" dev="sda1" ino=16525 scontext=unconfined_u:system_r:insmod_t:s0-s0:c0.c1023 tcontext=unconfined_u:object_r:file_t:s0 tclass=file permissive=1 2020/06/14 17:16:13 fuzzer started 2020/06/14 17:16:13 connecting to host at 10.0.2.10:46119 2020/06/14 17:16:13 checking machine... 2020/06/14 17:16:13 checking revisions... 2020/06/14 17:16:13 testing simple program... [ 264.544875][ T40] audit: type=1400 audit(1592154973.488:43): avc: denied { integrity } for pid=12690 comm="syz-fuzzer" lockdown_reason="debugfs access" scontext=unconfined_u:system_r:insmod_t:s0-s0:c0.c1023 tcontext=unconfined_u:system_r:insmod_t:s0-s0:c0.c1023 tclass=lockdown permissive=1 [ 264.616246][ T40] audit: type=1400 audit(1592154973.488:44): avc: denied { map } for pid=12690 comm="syz-fuzzer" path="/sys/kernel/debug/kcov" dev="debugfs" ino=1071 scontext=unconfined_u:system_r:insmod_t:s0-s0:c0.c1023 tcontext=system_u:object_r:debugfs_t:s0 tclass=file permissive=1 [ 265.381547][T12692] BUG: using smp_processor_id() in preemptible [00000000] code: syz-fuzzer/12692 [ 265.395898][T12692] caller is ext4_mb_new_blocks+0xa4d/0x3b70 [ 265.408983][T12692] CPU: 3 PID: 12692 Comm: syz-fuzzer Not tainted 5.7.0-syzkaller #0 [ 265.418819][T12692] Hardware name: QEMU Standard PC (Q35 + ICH9, 2009), BIOS rel-1.12.0-59-gc9ba5276e321-prebuilt.qemu.org 04/01/2014 [ 265.418819][T12692] Call Trace: [ 265.418819][T12692] dump_stack+0x18f/0x20d [ 265.418819][T12692] check_preemption_disabled+0x20d/0x220 [ 265.418819][T12692] ext4_mb_new_blocks+0xa4d/0x3b70 [ 265.418819][T12692] ? ext4_ext_search_right+0x2ca/0xb20 [ 265.418819][T12692] ? ext4_inode_to_goal_block+0x2df/0x3f0 [ 265.418819][T12692] ext4_ext_map_blocks+0x201b/0x33e0 [ 265.418819][T12692] ? ext4_ext_release+0x10/0x10 [ 265.418819][T12692] ? down_write_killable+0x170/0x170 [ 265.418819][T12692] ? ext4_es_lookup_extent+0x41d/0xd10 [ 265.418819][T12692] ext4_map_blocks+0x4cb/0x1640 [ 265.418819][T12692] ? ext4_issue_zeroout+0x1e0/0x1e0 [ 265.418819][T12692] ? rcu_read_lock_sched_held+0x9c/0xd0 [ 265.418819][T12692] ? rcu_read_lock_any_held.part.0+0x50/0x50 [ 265.418819][T12692] ? __brelse+0x84/0xa0 [ 265.418819][T12692] ? __ext4_new_inode+0x144/0x55e0 [ 265.418819][T12692] ext4_getblk+0xad/0x520 [ 265.418819][T12692] ? ext4_iomap_overwrite_begin+0xa0/0xa0 [ 265.418819][T12692] ? ext4_free_inode+0x1700/0x1700 [ 265.418819][T12692] ext4_bread+0x7c/0x380 [ 265.418819][T12692] ? ext4_getblk+0x520/0x520 [ 265.418819][T12692] ? dquot_get_next_dqblk+0x180/0x180 [ 265.418819][T12692] ext4_append+0x153/0x360 [ 265.418819][T12692] ext4_mkdir+0x5e0/0xdf0 [ 265.418819][T12692] ? ext4_rmdir+0xde0/0xde0 [ 265.418819][T12692] vfs_mkdir+0x419/0x690 [ 265.418819][T12692] do_mkdirat+0x21e/0x280 [ 265.418819][T12692] ? __ia32_sys_mknod+0xb0/0xb0 [ 265.418819][T12692] ? do_syscall_64+0x1c/0xe0 [ 265.418819][T12692] ? lockdep_hardirqs_on_prepare+0x3a2/0x590 [ 265.418819][T12692] do_syscall_64+0x60/0xe0 [ 265.418819][T12692] entry_SYSCALL_64_after_hwframe+0x44/0xa9 [ 265.418819][T12692] RIP: 0033:0x4b02a0 [ 265.418819][T12692] Code: Bad RIP value. [ 265.418819][T12692] RSP: 002b:000000c0000774b8 EFLAGS: 00000212 ORIG_RAX: 0000000000000102 [ 265.418819][T12692] RAX: ffffffffffffffda RBX: 000000c00002ea00 RCX: 00000000004b02a0 [ 265.418819][T12692] RDX: 00000000000001c0 RSI: 000000c0000242e0 RDI: ffffffffffffff9c [ 265.418819][T12692] RBP: 000000c000077510 R08: 0000000000000000 R09: 0000000000000000 [ 265.418819][T12692] R10: 0000000000000000 R11: 0000000000000212 R12: ffffffffffffffff [ 265.418819][T12692] R13: 0000000000000018 R14: 0000000000000017 R15: 0000000000000100 [ 265.862620][T12709] BUG: using smp_processor_id() in preemptible [00000000] code: syz-executor.0/12709 [ 265.879189][T12709] caller is ext4_mb_new_blocks+0xa4d/0x3b70 [ 265.888384][T12709] CPU: 1 PID: 12709 Comm: syz-executor.0 Not tainted 5.7.0-syzkaller #0 [ 265.898223][T12709] Hardware name: QEMU Standard PC (Q35 + ICH9, 2009), BIOS rel-1.12.0-59-gc9ba5276e321-prebuilt.qemu.org 04/01/2014 [ 265.898223][T12709] Call Trace: [ 265.898223][T12709] dump_stack+0x18f/0x20d [ 265.898223][T12709] check_preemption_disabled+0x20d/0x220 [ 265.898223][T12709] ext4_mb_new_blocks+0xa4d/0x3b70 [ 265.898223][T12709] ? ext4_ext_search_right+0x2ca/0xb20 [ 265.898223][T12709] ? ext4_inode_to_goal_block+0x2df/0x3f0 [ 265.898223][T12709] ext4_ext_map_blocks+0x201b/0x33e0 [ 265.898223][T12709] ? ext4_ext_release+0x10/0x10 [ 265.898223][T12709] ? down_write_killable+0x170/0x170 [ 265.898223][T12709] ? ext4_es_lookup_extent+0x41d/0xd10 [ 265.898223][T12709] ext4_map_blocks+0x4cb/0x1640 [ 265.898223][T12709] ? ext4_issue_zeroout+0x1e0/0x1e0 [ 265.898223][T12709] ? rcu_read_lock_sched_held+0x9c/0xd0 [ 265.898223][T12709] ? rcu_read_lock_any_held.part.0+0x50/0x50 [ 265.898223][T12709] ? __brelse+0x84/0xa0 [ 265.898223][T12709] ? __ext4_new_inode+0x144/0x55e0 [ 265.898223][T12709] ext4_getblk+0xad/0x520 [ 265.898223][T12709] ? ext4_iomap_overwrite_begin+0xa0/0xa0 [ 265.898223][T12709] ? ext4_free_inode+0x1700/0x1700 [ 265.898223][T12709] ext4_bread+0x7c/0x380 [ 265.898223][T12709] ? ext4_getblk+0x520/0x520 [ 265.898223][T12709] ? dquot_get_next_dqblk+0x180/0x180 [ 265.898223][T12709] ? security_transition_sid+0x123/0x190 [ 265.898223][T12709] ? security_transition_sid+0xed/0x190 [ 265.898223][T12709] ext4_append+0x153/0x360 [ 265.898223][T12709] ext4_mkdir+0x5e0/0xdf0 [ 265.898223][T12709] ? ext4_rmdir+0xde0/0xde0 [ 265.898223][T12709] vfs_mkdir+0x419/0x690 [ 265.898223][T12709] do_mkdirat+0x21e/0x280 [ 265.898223][T12709] ? __ia32_sys_mknod+0xb0/0xb0 [ 265.898223][T12709] ? do_syscall_64+0x1c/0xe0 [ 265.898223][T12709] ? lockdep_hardirqs_on_prepare+0x3a2/0x590 [ 265.898223][T12709] do_syscall_64+0x60/0xe0 [ 265.898223][T12709] entry_SYSCALL_64_after_hwframe+0x44/0xa9 [ 265.898223][T12709] RIP: 0033:0x45bd57 [ 265.898223][T12709] Code: Bad RIP value. [ 265.898223][T12709] RSP: 002b:00007ffefca7fd68 EFLAGS: 00000246 ORIG_RAX: 0000000000000053 [ 265.898223][T12709] RAX: ffffffffffffffda RBX: 0000000000000001 RCX: 000000000045bd57 [ 265.898223][T12709] RDX: 000000000000000a RSI: 00000000000001c0 RDI: 00007ffefca7fe80 [ 265.898223][T12709] RBP: 000000000003a2f8 R08: 000000000000f8ff R09: 0000000000000000 [ 265.898223][T12709] R10: 0000000000000011 R11: 0000000000000246 R12: 00000000000000c2 [ 265.898223][T12709] R13: 00007ffefca7fe80 R14: 8421084210842109 R15: 00007ffefca7fe8c [ 266.477043][T12710] IPVS: ftp: loaded support on port[0] = 21 [ 266.583834][T12710] BUG: using smp_processor_id() in preemptible [00000000] code: syz-executor.0/12710 [ 266.598616][T12710] caller is ext4_mb_new_blocks+0xa4d/0x3b70 [ 266.611002][T12710] CPU: 3 PID: 12710 Comm: syz-executor.0 Not tainted 5.7.0-syzkaller #0 [ 266.620846][T12710] Hardware name: QEMU Standard PC (Q35 + ICH9, 2009), BIOS rel-1.12.0-59-gc9ba5276e321-prebuilt.qemu.org 04/01/2014 [ 266.620846][T12710] Call Trace: [ 266.620846][T12710] dump_stack+0x18f/0x20d [ 266.620846][T12710] check_preemption_disabled+0x20d/0x220 [ 266.620846][T12710] ext4_mb_new_blocks+0xa4d/0x3b70 [ 266.620846][T12710] ? ext4_ext_search_right+0x2ca/0xb20 [ 266.620846][T12710] ? ext4_inode_to_goal_block+0x2df/0x3f0 [ 266.620846][T12710] ext4_ext_map_blocks+0x201b/0x33e0 [ 266.620846][T12710] ? ext4_ext_release+0x10/0x10 [ 266.620846][T12710] ? down_write_killable+0x170/0x170 [ 266.620846][T12710] ? ext4_es_lookup_extent+0x41d/0xd10 [ 266.620846][T12710] ext4_map_blocks+0x4cb/0x1640 [ 266.620846][T12710] ? ext4_issue_zeroout+0x1e0/0x1e0 [ 266.620846][T12710] ? rcu_read_lock_sched_held+0x9c/0xd0 [ 266.620846][T12710] ? rcu_read_lock_any_held.part.0+0x50/0x50 [ 266.620846][T12710] ? __brelse+0x84/0xa0 [ 266.620846][T12710] ? __ext4_new_inode+0x144/0x55e0 [ 266.620846][T12710] ext4_getblk+0xad/0x520 [ 266.620846][T12710] ? ext4_iomap_overwrite_begin+0xa0/0xa0 [ 266.620846][T12710] ? ext4_free_inode+0x1700/0x1700 [ 266.620846][T12710] ext4_bread+0x7c/0x380 [ 266.620846][T12710] ? ext4_getblk+0x520/0x520 [ 266.620846][T12710] ? dquot_get_next_dqblk+0x180/0x180 [ 266.620846][T12710] ? security_transition_sid+0x123/0x190 [ 266.620846][T12710] ? security_transition_sid+0xed/0x190 [ 266.620846][T12710] ext4_append+0x153/0x360 [ 266.620846][T12710] ext4_mkdir+0x5e0/0xdf0 [ 266.620846][T12710] ? ext4_rmdir+0xde0/0xde0 [ 266.620846][T12710] vfs_mkdir+0x419/0x690 [ 266.620846][T12710] do_mkdirat+0x21e/0x280 [ 266.620846][T12710] ? __ia32_sys_mknod+0xb0/0xb0 [ 266.620846][T12710] ? do_syscall_64+0x1c/0xe0 [ 266.620846][T12710] ? lockdep_hardirqs_on_prepare+0x3a2/0x590 [ 266.620846][T12710] do_syscall_64+0x60/0xe0 [ 266.620846][T12710] entry_SYSCALL_64_after_hwframe+0x44/0xa9 [ 266.620846][T12710] RIP: 0033:0x45bd57 [ 266.620846][T12710] Code: Bad RIP value. [ 266.620846][T12710] RSP: 002b:00007ffefca7fc58 EFLAGS: 00000202 ORIG_RAX: 0000000000000053 [ 266.620846][T12710] RAX: ffffffffffffffda RBX: 00007ffefca7fcb0 RCX: 000000000045bd57 [ 266.620846][T12710] RDX: 00000000004a9308 RSI: 00000000000001ff RDI: 00007ffefca7fcb0 [ 266.620846][T12710] RBP: 00007ffefca7fcac R08: 0000000000000000 R09: 0000000000000003 [ 266.620846][T12710] R10: 0000000000000000 R11: 0000000000000202 R12: 000000000074c988 [ 266.620846][T12710] R13: 00007ffefca80098 R14: 0000000000000000 R15: 0000000000000000 [ 267.048649][T12710] BUG: using smp_processor_id() in preemptible [00000000] code: syz-executor.0/12710 [ 267.070662][T12710] caller is ext4_mb_new_blocks+0xa4d/0x3b70 [ 267.080373][T12710] CPU: 3 PID: 12710 Comm: syz-executor.0 Not tainted 5.7.0-syzkaller #0 [ 267.090295][T12710] Hardware name: QEMU Standard PC (Q35 + ICH9, 2009), BIOS rel-1.12.0-59-gc9ba5276e321-prebuilt.qemu.org 04/01/2014 [ 267.090295][T12710] Call Trace: [ 267.090295][T12710] dump_stack+0x18f/0x20d [ 267.090295][T12710] check_preemption_disabled+0x20d/0x220 [ 267.090295][T12710] ext4_mb_new_blocks+0xa4d/0x3b70 [ 267.090295][T12710] ? ext4_ext_search_right+0x2ca/0xb20 [ 267.090295][T12710] ? ext4_inode_to_goal_block+0x2df/0x3f0 [ 267.090295][T12710] ext4_ext_map_blocks+0x201b/0x33e0 [ 267.090295][T12710] ? ext4_ext_release+0x10/0x10 [ 267.090295][T12710] ? down_write_killable+0x170/0x170 [ 267.090295][T12710] ? ext4_es_lookup_extent+0x41d/0xd10 [ 267.090295][T12710] ext4_map_blocks+0x4cb/0x1640 [ 267.090295][T12710] ? ext4_issue_zeroout+0x1e0/0x1e0 [ 267.090295][T12710] ? rcu_read_lock_sched_held+0x9c/0xd0 [ 267.090295][T12710] ? rcu_read_lock_any_held.part.0+0x50/0x50 [ 267.090295][T12710] ? __brelse+0x84/0xa0 [ 267.090295][T12710] ? __ext4_new_inode+0x144/0x55e0 [ 267.090295][T12710] ext4_getblk+0xad/0x520 [ 267.090295][T12710] ? ext4_iomap_overwrite_begin+0xa0/0xa0 [ 267.090295][T12710] ? ext4_free_inode+0x1700/0x1700 [ 267.090295][T12710] ext4_bread+0x7c/0x380 [ 267.090295][T12710] ? ext4_getblk+0x520/0x520 [ 267.090295][T12710] ? dquot_get_next_dqblk+0x180/0x180 [ 267.090295][T12710] ? security_transition_sid+0x123/0x190 [ 267.090295][T12710] ? security_transition_sid+0xed/0x190 [ 267.090295][T12710] ext4_append+0x153/0x360 [ 267.090295][T12710] ext4_mkdir+0x5e0/0xdf0 [ 267.090295][T12710] ? ext4_rmdir+0xde0/0xde0 [ 267.090295][T12710] vfs_mkdir+0x419/0x690 [ 267.090295][T12710] do_mkdirat+0x21e/0x280 [ 267.090295][T12710] ? __ia32_sys_mknod+0xb0/0xb0 [ 267.090295][T12710] ? do_syscall_64+0x1c/0xe0 [ 267.090295][T12710] ? lockdep_hardirqs_on_prepare+0x3a2/0x590 [ 267.090295][T12710] do_syscall_64+0x60/0xe0 [ 267.090295][T12710] entry_SYSCALL_64_after_hwframe+0x44/0xa9 [ 267.090295][T12710] RIP: 0033:0x45bd57 [ 267.090295][T12710] Code: Bad RIP value. [ 267.090295][T12710] RSP: 002b:00007ffefca7fc58 EFLAGS: 00000202 ORIG_RAX: 0000000000000053 [ 267.090295][T12710] RAX: ffffffffffffffda RBX: 00007ffefca7fcb0 RCX: 000000000045bd57 [ 267.090295][T12710] RDX: 00000000004a9308 RSI: 00000000000001ff RDI: 00007ffefca7fcb0 [ 267.090295][T12710] RBP: 00007ffefca7fcac R08: 0000000000000001 R09: 0000000000000003 [ 267.090295][T12710] R10: 0000000000000000 R11: 0000000000000202 R12: 0000000000000002 [ 267.090295][T12710] R13: 0000000000000003 R14: 0000000000040f6c R15: 00000000ffffffff [ 267.677245][ T1813] tipc: TX() has been purged, node left! [ 268.414106][ T1813] ================================================================== [ 268.416779][ T1813] BUG: KASAN: use-after-free in afs_wake_up_async_call+0x6aa/0x770 [ 268.416779][ T1813] Write of size 1 at addr ffff88801d18b9e4 by task kworker/u16:1/1813 [ 268.416779][ T1813] [ 268.416779][ T1813] CPU: 3 PID: 1813 Comm: kworker/u16:1 Not tainted 5.7.0-syzkaller #0 [ 268.416779][ T1813] Hardware name: QEMU Standard PC (Q35 + ICH9, 2009), BIOS rel-1.12.0-59-gc9ba5276e321-prebuilt.qemu.org 04/01/2014 [ 268.416779][ T1813] Workqueue: netns cleanup_net [ 268.416779][ T1813] Call Trace: [ 268.416779][ T1813] dump_stack+0x18f/0x20d [ 268.416779][ T1813] ? afs_wake_up_async_call+0x6aa/0x770 [ 268.416779][ T1813] ? afs_wake_up_async_call+0x6aa/0x770 [ 268.416779][ T1813] ? afs_put_call+0xa40/0xa40 [ 268.416779][ T1813] print_address_description.constprop.0.cold+0xd3/0x413 [ 268.416779][ T1813] ? vprintk_func+0x97/0x1a6 [ 268.416779][ T1813] ? afs_wake_up_async_call+0x6aa/0x770 [ 268.416779][ T1813] kasan_report.cold+0x1f/0x37 [ 268.416779][ T1813] ? rcu_read_lock_held+0x81/0xb0 [ 268.416779][ T1813] ? afs_wake_up_async_call+0x6aa/0x770 [ 268.416779][ T1813] afs_wake_up_async_call+0x6aa/0x770 [ 268.416779][ T1813] ? afs_close_socket+0x320/0x320 [ 268.416779][ T1813] ? afs_put_call+0xa40/0xa40 [ 268.416779][ T1813] rxrpc_notify_socket+0x1db/0x5d0 [ 268.416779][ T1813] ? afs_put_call+0xa40/0xa40 [ 268.416779][ T1813] __rxrpc_set_call_completion.part.0+0x172/0x410 [ 268.416779][ T1813] rxrpc_call_completed+0xca/0xf0 [ 268.416779][ T1813] rxrpc_discard_prealloc+0x781/0xab0 [ 268.416779][ T1813] ? lock_sock_nested+0x94/0x110 [ 268.416779][ T1813] rxrpc_listen+0x147/0x360 [ 268.416779][ T1813] afs_close_socket+0x95/0x320 [ 268.416779][ T1813] ? afs_purge_servers+0x16d/0x300 [ 268.416779][ T1813] ? afs_rx_discard_new_call+0x50/0x50 [ 268.416779][ T1813] ? init_wait_var_entry+0x200/0x200 [ 268.416779][ T1813] ? rcu_read_lock_held_common+0xa0/0xa0 [ 268.416779][ T1813] ? check_preemption_disabled+0x38/0x220 [ 268.416779][ T1813] afs_net_exit+0x1bc/0x310 [ 268.416779][ T1813] ? afs_net_init+0xe30/0xe30 [ 268.416779][ T1813] ops_exit_list.isra.0+0xa8/0x150 [ 268.416779][ T1813] cleanup_net+0x511/0xa50 [ 268.416779][ T1813] ? unregister_pernet_device+0x70/0x70 [ 268.416779][ T1813] ? rcu_read_lock_any_held.part.0+0x50/0x50 [ 268.416779][ T1813] process_one_work+0x965/0x1690 [ 268.416779][ T1813] ? lock_release+0x800/0x800 [ 268.416779][ T1813] ? pwq_dec_nr_in_flight+0x310/0x310 [ 268.416779][ T1813] ? rwlock_bug.part.0+0x90/0x90 [ 268.416779][ T1813] worker_thread+0x96/0xe10 [ 268.416779][ T1813] ? process_one_work+0x1690/0x1690 [ 268.416779][ T1813] kthread+0x3b5/0x4a0 [ 268.416779][ T1813] ? kthread_mod_delayed_work+0x1a0/0x1a0 [ 268.416779][ T1813] ? kthread_mod_delayed_work+0x1a0/0x1a0 [ 268.416779][ T1813] ret_from_fork+0x1f/0x30 [ 268.416779][ T1813] [ 268.416779][ T1813] Allocated by task 12710: [ 268.416779][ T1813] save_stack+0x1b/0x40 [ 268.416779][ T1813] __kasan_kmalloc.constprop.0+0xbf/0xd0 [ 268.416779][ T1813] kmem_cache_alloc_trace+0x153/0x7d0 [ 268.416779][ T1813] afs_alloc_call+0x55/0x630 [ 268.416779][ T1813] afs_charge_preallocation+0xe9/0x2d0 [ 268.416779][ T1813] afs_open_socket+0x292/0x360 [ 268.416779][ T1813] afs_net_init+0xa6c/0xe30 [ 268.416779][ T1813] ops_init+0xaf/0x420 [ 268.416779][ T1813] setup_net+0x2de/0x860 [ 268.416779][ T1813] copy_net_ns+0x293/0x590 [ 268.416779][ T1813] create_new_namespaces+0x3fb/0xb30 [ 268.416779][ T1813] unshare_nsproxy_namespaces+0xbd/0x1f0 [ 268.416779][ T1813] ksys_unshare+0x43d/0x8e0 [ 268.416779][ T1813] __x64_sys_unshare+0x2d/0x40 [ 268.416779][ T1813] do_syscall_64+0x60/0xe0 [ 268.416779][ T1813] entry_SYSCALL_64_after_hwframe+0x44/0xa9 [ 268.416779][ T1813] [ 268.416779][ T1813] Freed by task 1813: [ 268.416779][ T1813] save_stack+0x1b/0x40 [ 268.416779][ T1813] __kasan_slab_free+0xf7/0x140 [ 268.416779][ T1813] kfree+0x109/0x2b0 [ 268.416779][ T1813] afs_put_call+0x585/0xa40 [ 268.416779][ T1813] rxrpc_discard_prealloc+0x764/0xab0 [ 268.416779][ T1813] rxrpc_listen+0x147/0x360 [ 268.416779][ T1813] afs_close_socket+0x95/0x320 [ 268.416779][ T1813] afs_net_exit+0x1bc/0x310 [ 268.416779][ T1813] ops_exit_list.isra.0+0xa8/0x150 [ 268.416779][ T1813] cleanup_net+0x511/0xa50 [ 268.416779][ T1813] process_one_work+0x965/0x1690 [ 268.416779][ T1813] worker_thread+0x96/0xe10 [ 268.416779][ T1813] kthread+0x3b5/0x4a0 [ 268.416779][ T1813] ret_from_fork+0x1f/0x30 [ 268.416779][ T1813] [ 268.416779][ T1813] The buggy address belongs to the object at ffff88801d18b800 [ 268.416779][ T1813] which belongs to the cache kmalloc-1k of size 1024 [ 268.416779][ T1813] The buggy address is located 484 bytes inside of [ 268.416779][ T1813] 1024-byte region [ffff88801d18b800, ffff88801d18bc00) [ 268.416779][ T1813] The buggy address belongs to the page: [ 268.416779][ T1813] page:ffffea00007462c0 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 [ 268.416779][ T1813] flags: 0xfffe0000000200(slab) [ 268.416779][ T1813] raw: 00fffe0000000200 ffffea00009e1688 ffffea00004f1708 ffff88802c800c40 [ 268.416779][ T1813] raw: 0000000000000000 ffff88801d18b000 0000000100000002 0000000000000000 [ 268.416779][ T1813] page dumped because: kasan: bad access detected [ 269.217224][ T1813] [ 269.217224][ T1813] Memory state around the buggy address: [ 269.217224][ T1813] ffff88801d18b880: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 269.217224][ T1813] ffff88801d18b900: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 269.217224][ T1813] >ffff88801d18b980: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 269.217224][ T1813] ^ [ 269.217224][ T1813] ffff88801d18ba00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 269.217224][ T1813] ffff88801d18ba80: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 269.217224][ T1813] ================================================================== [ 269.217224][ T1813] Disabling lock debugging due to kernel taint [ 269.342330][ T1813] Kernel panic - not syncing: panic_on_warn set ... [ 269.352245][ T1813] CPU: 3 PID: 1813 Comm: kworker/u16:1 Tainted: G B 5.7.0-syzkaller #0 [ 269.352245][ T1813] Hardware name: QEMU Standard PC (Q35 + ICH9, 2009), BIOS rel-1.12.0-59-gc9ba5276e321-prebuilt.qemu.org 04/01/2014 [ 269.352245][ T1813] Workqueue: netns cleanup_net [ 269.352245][ T1813] Call Trace: [ 269.352245][ T1813] dump_stack+0x18f/0x20d [ 269.352245][ T1813] ? afs_wake_up_async_call+0x5f0/0x770 [ 269.352245][ T1813] ? afs_put_call+0xa40/0xa40 [ 269.352245][ T1813] panic+0x2e3/0x75c [ 269.352245][ T1813] ? __warn_printk+0xf3/0xf3 [ 269.352245][ T1813] ? asm_sysvec_apic_timer_interrupt+0x12/0x20 [ 269.352245][ T1813] ? trace_hardirqs_on+0x55/0x220 [ 269.352245][ T1813] ? afs_wake_up_async_call+0x6aa/0x770 [ 269.352245][ T1813] ? afs_wake_up_async_call+0x6aa/0x770 [ 269.352245][ T1813] ? afs_put_call+0xa40/0xa40 [ 269.352245][ T1813] end_report+0x4d/0x53 [ 269.352245][ T1813] kasan_report.cold+0xd/0x37 [ 269.352245][ T1813] ? rcu_read_lock_held+0x81/0xb0 [ 269.352245][ T1813] ? afs_wake_up_async_call+0x6aa/0x770 [ 269.352245][ T1813] afs_wake_up_async_call+0x6aa/0x770 [ 269.352245][ T1813] ? afs_close_socket+0x320/0x320 [ 269.352245][ T1813] ? afs_put_call+0xa40/0xa40 [ 269.352245][ T1813] rxrpc_notify_socket+0x1db/0x5d0 [ 269.352245][ T1813] ? afs_put_call+0xa40/0xa40 [ 269.352245][ T1813] __rxrpc_set_call_completion.part.0+0x172/0x410 [ 269.352245][ T1813] rxrpc_call_completed+0xca/0xf0 [ 269.352245][ T1813] rxrpc_discard_prealloc+0x781/0xab0 [ 269.352245][ T1813] ? lock_sock_nested+0x94/0x110 [ 269.352245][ T1813] rxrpc_listen+0x147/0x360 [ 269.352245][ T1813] afs_close_socket+0x95/0x320 [ 269.352245][ T1813] ? afs_purge_servers+0x16d/0x300 [ 269.352245][ T1813] ? afs_rx_discard_new_call+0x50/0x50 [ 269.352245][ T1813] ? init_wait_var_entry+0x200/0x200 [ 269.352245][ T1813] ? rcu_read_lock_held_common+0xa0/0xa0 [ 269.352245][ T1813] ? check_preemption_disabled+0x38/0x220 [ 269.352245][ T1813] afs_net_exit+0x1bc/0x310 [ 269.352245][ T1813] ? afs_net_init+0xe30/0xe30 [ 269.352245][ T1813] ops_exit_list.isra.0+0xa8/0x150 [ 269.352245][ T1813] cleanup_net+0x511/0xa50 [ 269.352245][ T1813] ? unregister_pernet_device+0x70/0x70 [ 269.352245][ T1813] ? rcu_read_lock_any_held.part.0+0x50/0x50 [ 269.352245][ T1813] process_one_work+0x965/0x1690 [ 269.352245][ T1813] ? lock_release+0x800/0x800 [ 269.352245][ T1813] ? pwq_dec_nr_in_flight+0x310/0x310 [ 269.352245][ T1813] ? rwlock_bug.part.0+0x90/0x90 [ 269.352245][ T1813] worker_thread+0x96/0xe10 [ 269.352245][ T1813] ? process_one_work+0x1690/0x1690 [ 269.352245][ T1813] kthread+0x3b5/0x4a0 [ 269.352245][ T1813] ? kthread_mod_delayed_work+0x1a0/0x1a0 [ 269.352245][ T1813] ? kthread_mod_delayed_work+0x1a0/0x1a0 [ 269.352245][ T1813] ret_from_fork+0x1f/0x30 [ 269.352245][ T1813] Kernel Offset: disabled [ 269.352245][ T1813] Rebooting in 86400 seconds..