[....] Starting enhanced syslogd: rsyslogd[?25l[?1c7[ ok 8[?25h[?0c. [ 86.977557][ T27] audit: type=1800 audit(1579408615.909:25): pid=9668 uid=0 auid=4294967295 ses=4294967295 subj==unconfined op=collect_data cause=failed(directio) comm="startpar" name="cron" dev="sda1" ino=2414 res=0 [ 86.997554][ T27] audit: type=1800 audit(1579408615.929:26): pid=9668 uid=0 auid=4294967295 ses=4294967295 subj==unconfined op=collect_data cause=failed(directio) comm="startpar" name="mcstrans" dev="sda1" ino=2457 res=0 [ 87.029657][ T27] audit: type=1800 audit(1579408615.929:27): pid=9668 uid=0 auid=4294967295 ses=4294967295 subj==unconfined op=collect_data cause=failed(directio) comm="startpar" name="restorecond" dev="sda1" ino=2436 res=0 [....] Starting periodic command scheduler: cron[?25l[?1c7[ ok 8[?25h[?0c. [....] Starting OpenBSD Secure Shell server: sshd[?25l[?1c7[ ok 8[?25h[?0c. Debian GNU/Linux 7 syzkaller ttyS0 Warning: Permanently added '10.128.0.102' (ECDSA) to the list of known hosts. executing program syzkaller login: [ 96.668863][ T9820] ================================================================== [ 96.677276][ T9820] BUG: KASAN: slab-out-of-bounds in bitmap_ip_list+0x40f/0xf20 [ 96.684884][ T9820] Read of size 8 at addr ffff8880a17c6a40 by task syz-executor299/9820 [ 96.693199][ T9820] [ 96.695516][ T9820] CPU: 1 PID: 9820 Comm: syz-executor299 Not tainted 5.5.0-rc5-syzkaller #0 [ 96.704546][ T9820] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 96.714593][ T9820] Call Trace: [ 96.717888][ T9820] dump_stack+0x197/0x210 [ 96.722212][ T9820] ? bitmap_ip_list+0x40f/0xf20 [ 96.727051][ T9820] print_address_description.constprop.0.cold+0xd4/0x30b [ 96.734354][ T9820] ? bitmap_ip_list+0x40f/0xf20 [ 96.739210][ T9820] ? bitmap_ip_list+0x40f/0xf20 [ 96.744166][ T9820] __kasan_report.cold+0x1b/0x41 [ 96.749106][ T9820] ? bitmap_ip_list+0x40f/0xf20 [ 96.754057][ T9820] kasan_report+0x12/0x20 [ 96.758438][ T9820] check_memory_region+0x134/0x1a0 [ 96.763723][ T9820] __kasan_check_read+0x11/0x20 [ 96.768727][ T9820] bitmap_ip_list+0x40f/0xf20 [ 96.773456][ T9820] ? bitmap_ip_add+0xe60/0xe60 [ 96.778307][ T9820] ? nla_put+0x110/0x150 [ 96.782711][ T9820] ip_set_dump_start+0x96c/0x1ca0 [ 96.787731][ T9820] ? ip_set_rename+0x720/0x720 [ 96.792498][ T9820] ? __kmalloc_reserve.isra.0+0xf0/0xf0 [ 96.798215][ T9820] ? perf_trace_lock_acquire+0x4b0/0x530 [ 96.803851][ T9820] ? __kasan_check_write+0x14/0x20 [ 96.809051][ T9820] netlink_dump+0x558/0xfb0 [ 96.813558][ T9820] ? __netlink_sendskb+0xc0/0xc0 [ 96.818511][ T9820] __netlink_dump_start+0x66a/0x930 [ 96.823724][ T9820] ip_set_dump+0x15a/0x1d0 [ 96.828152][ T9820] ? call_ad+0x5a0/0x5a0 [ 96.832445][ T9820] ? ip_set_rename+0x720/0x720 [ 96.837219][ T9820] ? __ip_set_put_netlink.isra.0+0x90/0x90 [ 96.844121][ T9820] ? call_ad+0x5a0/0x5a0 [ 96.848573][ T9820] nfnetlink_rcv_msg+0xcf2/0xfb0 [ 96.853523][ T9820] ? nfnetlink_bind+0x2c0/0x2c0 [ 96.858372][ T9820] ? __kasan_check_read+0x11/0x20 [ 96.863400][ T9820] ? __lock_acquire+0x8a0/0x4a00 [ 96.868326][ T9820] ? save_stack+0x5c/0x90 [ 96.872664][ T9820] ? __sanitizer_cov_trace_const_cmp4+0x16/0x20 [ 96.878940][ T9820] ? apparmor_capable+0x497/0x900 [ 96.883967][ T9820] ? __sanitizer_cov_trace_const_cmp4+0x16/0x20 [ 96.890201][ T9820] ? __kasan_check_read+0x11/0x20 [ 96.895212][ T9820] ? apparmor_cred_prepare+0x7b0/0x7b0 [ 96.900724][ T9820] netlink_rcv_skb+0x177/0x450 [ 96.905713][ T9820] ? nfnetlink_bind+0x2c0/0x2c0 [ 96.910911][ T9820] ? netlink_ack+0xb50/0xb50 [ 96.915503][ T9820] ? __sanitizer_cov_trace_const_cmp4+0x16/0x20 [ 96.921735][ T9820] ? ns_capable_common+0x93/0x100 [ 96.926764][ T9820] ? ns_capable+0x20/0x30 [ 96.931112][ T9820] ? __netlink_ns_capable+0x104/0x140 [ 96.936481][ T9820] nfnetlink_rcv+0x1ba/0x460 [ 96.941293][ T9820] ? nfnetlink_rcv_batch+0x17a0/0x17a0 [ 96.946744][ T9820] ? netlink_deliver_tap+0x24a/0xbe0 [ 96.952122][ T9820] ? __kasan_check_write+0x14/0x20 [ 96.957355][ T9820] netlink_unicast+0x58c/0x7d0 [ 96.962121][ T9820] ? netlink_attachskb+0x870/0x870 [ 96.967232][ T9820] ? __sanitizer_cov_trace_cmp8+0x18/0x20 [ 96.973167][ T9820] ? __check_object_size+0x3d/0x437 [ 96.978527][ T9820] netlink_sendmsg+0x91c/0xea0 [ 96.983308][ T9820] ? netlink_unicast+0x7d0/0x7d0 [ 96.988235][ T9820] ? aa_sock_msg_perm.isra.0+0xba/0x170 [ 96.993784][ T9820] ? apparmor_socket_sendmsg+0x2a/0x30 [ 96.999264][ T9820] ? __sanitizer_cov_trace_const_cmp4+0x16/0x20 [ 97.005497][ T9820] ? security_socket_sendmsg+0x8d/0xc0 [ 97.010952][ T9820] ? netlink_unicast+0x7d0/0x7d0 [ 97.015982][ T9820] sock_sendmsg+0xd7/0x130 [ 97.020391][ T9820] ____sys_sendmsg+0x753/0x880 [ 97.025157][ T9820] ? kernel_sendmsg+0x50/0x50 [ 97.030540][ T9820] ? lockdep_init_map+0x1be/0x6d0 [ 97.035696][ T9820] ___sys_sendmsg+0x100/0x170 [ 97.040369][ T9820] ? sendmsg_copy_msghdr+0x70/0x70 [ 97.045484][ T9820] ? __kasan_check_read+0x11/0x20 [ 97.050539][ T9820] ? __lock_acquire+0x8a0/0x4a00 [ 97.055622][ T9820] ? __sanitizer_cov_trace_const_cmp4+0x16/0x20 [ 97.061861][ T9820] ? __this_cpu_preempt_check+0x35/0x190 [ 97.067504][ T9820] ? __sanitizer_cov_trace_const_cmp4+0x16/0x20 [ 97.073775][ T9820] ? percpu_counter_add_batch+0x13c/0x190 [ 97.079600][ T9820] ? __fd_install+0x1bc/0x640 [ 97.084732][ T9820] ? find_held_lock+0x35/0x130 [ 97.089520][ T9820] ? __fd_install+0x1bc/0x640 [ 97.094435][ T9820] ? __sanitizer_cov_trace_const_cmp4+0x16/0x20 [ 97.100674][ T9820] ? __fget_light+0x1a9/0x230 [ 97.105357][ T9820] ? __fdget+0x1b/0x20 [ 97.109512][ T9820] ? __sanitizer_cov_trace_const_cmp8+0x18/0x20 [ 97.115790][ T9820] __sys_sendmsg+0x105/0x1d0 [ 97.120482][ T9820] ? __sys_sendmsg_sock+0xc0/0xc0 [ 97.125579][ T9820] ? trace_hardirqs_on_thunk+0x1a/0x1c [ 97.131281][ T9820] ? do_syscall_64+0x26/0x790 [ 97.135949][ T9820] ? entry_SYSCALL_64_after_hwframe+0x49/0xbe [ 97.142018][ T9820] ? do_syscall_64+0x26/0x790 [ 97.146940][ T9820] __x64_sys_sendmsg+0x78/0xb0 [ 97.151891][ T9820] do_syscall_64+0xfa/0x790 [ 97.156925][ T9820] entry_SYSCALL_64_after_hwframe+0x49/0xbe [ 97.163559][ T9820] RIP: 0033:0x440559 [ 97.168224][ T9820] Code: 18 89 d0 c3 66 2e 0f 1f 84 00 00 00 00 00 0f 1f 00 48 89 f8 48 89 f7 48 89 d6 48 89 ca 4d 89 c2 4d 89 c8 4c 8b 4c 24 08 0f 05 <48> 3d 01 f0 ff ff 0f 83 fb 13 fc ff c3 66 2e 0f 1f 84 00 00 00 00 [ 97.188056][ T9820] RSP: 002b:00007ffed73a3618 EFLAGS: 00000246 ORIG_RAX: 000000000000002e [ 97.197359][ T9820] RAX: ffffffffffffffda RBX: 00000000004002c8 RCX: 0000000000440559 [ 97.205445][ T9820] RDX: 0000000000000080 RSI: 00000000200000c0 RDI: 0000000000000004 [ 97.213527][ T9820] RBP: 00000000006ca018 R08: 00000000004002c8 R09: 00000000004002c8 [ 97.221638][ T9820] R10: 0000000000000002 R11: 0000000000000246 R12: 0000000000401de0 [ 97.229639][ T9820] R13: 0000000000401e70 R14: 0000000000000000 R15: 0000000000000000 [ 97.237840][ T9820] [ 97.240306][ T9820] Allocated by task 9820: [ 97.244719][ T9820] save_stack+0x23/0x90 [ 97.248873][ T9820] __kasan_kmalloc.constprop.0+0xcf/0xe0 [ 97.254652][ T9820] kasan_kmalloc+0x9/0x10 [ 97.259297][ T9820] __kmalloc+0x163/0x770 [ 97.264820][ T9820] ip_set_alloc+0x38/0x5e [ 97.269148][ T9820] bitmap_ip_create+0x6ec/0xc20 [ 97.273991][ T9820] ip_set_create+0x6f1/0x1500 [ 97.278671][ T9820] nfnetlink_rcv_msg+0xcf2/0xfb0 [ 97.283705][ T9820] netlink_rcv_skb+0x177/0x450 [ 97.288479][ T9820] nfnetlink_rcv+0x1ba/0x460 [ 97.293068][ T9820] netlink_unicast+0x58c/0x7d0 [ 97.297987][ T9820] netlink_sendmsg+0x91c/0xea0 [ 97.304031][ T9820] sock_sendmsg+0xd7/0x130 [ 97.308447][ T9820] ____sys_sendmsg+0x753/0x880 [ 97.313380][ T9820] ___sys_sendmsg+0x100/0x170 [ 97.318051][ T9820] __sys_sendmsg+0x105/0x1d0 [ 97.322732][ T9820] __x64_sys_sendmsg+0x78/0xb0 [ 97.327494][ T9820] do_syscall_64+0xfa/0x790 [ 97.332278][ T9820] entry_SYSCALL_64_after_hwframe+0x49/0xbe [ 97.338356][ T9820] [ 97.340689][ T9820] Freed by task 9545: [ 97.344672][ T9820] save_stack+0x23/0x90 [ 97.349149][ T9820] __kasan_slab_free+0x102/0x150 [ 97.354084][ T9820] kasan_slab_free+0xe/0x10 [ 97.358734][ T9820] kfree+0x10a/0x2c0 [ 97.363402][ T9820] single_release+0x95/0xc0 [ 97.367893][ T9820] __fput+0x2ff/0x890 [ 97.372001][ T9820] ____fput+0x16/0x20 [ 97.375967][ T9820] task_work_run+0x145/0x1c0 [ 97.380557][ T9820] exit_to_usermode_loop+0x316/0x380 [ 97.385988][ T9820] do_syscall_64+0x676/0x790 [ 97.390574][ T9820] entry_SYSCALL_64_after_hwframe+0x49/0xbe [ 97.396886][ T9820] [ 97.399214][ T9820] The buggy address belongs to the object at ffff8880a17c6a40 [ 97.399214][ T9820] which belongs to the cache kmalloc-32 of size 32 [ 97.413212][ T9820] The buggy address is located 0 bytes inside of [ 97.413212][ T9820] 32-byte region [ffff8880a17c6a40, ffff8880a17c6a60) [ 97.426398][ T9820] The buggy address belongs to the page: [ 97.432037][ T9820] page:ffffea000285f180 refcount:1 mapcount:0 mapping:ffff8880aa4001c0 index:0xffff8880a17c6fc1 [ 97.442563][ T9820] raw: 00fffe0000000200 ffffea00029ee4c8 ffffea0002524588 ffff8880aa4001c0 [ 97.451605][ T9820] raw: ffff8880a17c6fc1 ffff8880a17c6000 0000000100000033 0000000000000000 [ 97.460726][ T9820] page dumped because: kasan: bad access detected [ 97.467185][ T9820] [ 97.470208][ T9820] Memory state around the buggy address: [ 97.475916][ T9820] ffff8880a17c6900: fb fb fb fb fc fc fc fc fb fb fb fb fc fc fc fc [ 97.483976][ T9820] ffff8880a17c6980: fb fb fb fb fc fc fc fc 00 07 fc fc fc fc fc fc [ 97.492077][ T9820] >ffff8880a17c6a00: fb fb fb fb fc fc fc fc 04 fc fc fc fc fc fc fc [ 97.500247][ T9820] ^ [ 97.506394][ T9820] ffff8880a17c6a80: fb fb fb fb fc fc fc fc 00 00 fc fc fc fc fc fc [ 97.514888][ T9820] ffff8880a17c6b00: fb fb fb fb fc fc fc fc fb fb fb fb fc fc fc fc [ 97.523042][ T9820] ================================================================== [ 97.531180][ T9820] Disabling lock debugging due to kernel taint [ 97.538912][ T9820] Kernel panic - not syncing: panic_on_warn set ... [ 97.545583][ T9820] CPU: 0 PID: 9820 Comm: syz-executor299 Tainted: G B 5.5.0-rc5-syzkaller #0 [ 97.555645][ T9820] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 97.565690][ T9820] Call Trace: [ 97.568973][ T9820] dump_stack+0x197/0x210 [ 97.573291][ T9820] panic+0x2e3/0x75c [ 97.577169][ T9820] ? add_taint.cold+0x16/0x16 [ 97.583951][ T9820] ? bitmap_ip_list+0x40f/0xf20 [ 97.589499][ T9820] ? preempt_schedule+0x4b/0x60 [ 97.594552][ T9820] ? ___preempt_schedule+0x16/0x18 [ 97.599800][ T9820] ? trace_hardirqs_on+0x5e/0x240 [ 97.604922][ T9820] ? bitmap_ip_list+0x40f/0xf20 [ 97.609830][ T9820] end_report+0x47/0x4f [ 97.613985][ T9820] ? bitmap_ip_list+0x40f/0xf20 [ 97.618933][ T9820] __kasan_report.cold+0xe/0x41 [ 97.624082][ T9820] ? bitmap_ip_list+0x40f/0xf20 [ 97.628932][ T9820] kasan_report+0x12/0x20 [ 97.633267][ T9820] check_memory_region+0x134/0x1a0 [ 97.638414][ T9820] __kasan_check_read+0x11/0x20 [ 97.643348][ T9820] bitmap_ip_list+0x40f/0xf20 [ 97.648153][ T9820] ? bitmap_ip_add+0xe60/0xe60 [ 97.652912][ T9820] ? nla_put+0x110/0x150 [ 97.657371][ T9820] ip_set_dump_start+0x96c/0x1ca0 [ 97.662916][ T9820] ? ip_set_rename+0x720/0x720 [ 97.667886][ T9820] ? __kmalloc_reserve.isra.0+0xf0/0xf0 [ 97.673466][ T9820] ? perf_trace_lock_acquire+0x4b0/0x530 [ 97.679099][ T9820] ? __kasan_check_write+0x14/0x20 [ 97.684429][ T9820] netlink_dump+0x558/0xfb0 [ 97.689067][ T9820] ? __netlink_sendskb+0xc0/0xc0 [ 97.694005][ T9820] __netlink_dump_start+0x66a/0x930 [ 97.699366][ T9820] ip_set_dump+0x15a/0x1d0 [ 97.703784][ T9820] ? call_ad+0x5a0/0x5a0 [ 97.708146][ T9820] ? ip_set_rename+0x720/0x720 [ 97.712953][ T9820] ? __ip_set_put_netlink.isra.0+0x90/0x90 [ 97.718870][ T9820] ? call_ad+0x5a0/0x5a0 [ 97.723192][ T9820] nfnetlink_rcv_msg+0xcf2/0xfb0 [ 97.728276][ T9820] ? nfnetlink_bind+0x2c0/0x2c0 [ 97.733236][ T9820] ? __kasan_check_read+0x11/0x20 [ 97.738244][ T9820] ? __lock_acquire+0x8a0/0x4a00 [ 97.743279][ T9820] ? save_stack+0x5c/0x90 [ 97.747611][ T9820] ? __sanitizer_cov_trace_const_cmp4+0x16/0x20 [ 97.753951][ T9820] ? apparmor_capable+0x497/0x900 [ 97.758975][ T9820] ? __sanitizer_cov_trace_const_cmp4+0x16/0x20 [ 97.768077][ T9820] ? __kasan_check_read+0x11/0x20 [ 97.773097][ T9820] ? apparmor_cred_prepare+0x7b0/0x7b0 [ 97.778554][ T9820] netlink_rcv_skb+0x177/0x450 [ 97.783321][ T9820] ? nfnetlink_bind+0x2c0/0x2c0 [ 97.788169][ T9820] ? netlink_ack+0xb50/0xb50 [ 97.792764][ T9820] ? __sanitizer_cov_trace_const_cmp4+0x16/0x20 [ 97.798996][ T9820] ? ns_capable_common+0x93/0x100 [ 97.804030][ T9820] ? ns_capable+0x20/0x30 [ 97.808355][ T9820] ? __netlink_ns_capable+0x104/0x140 [ 97.815215][ T9820] nfnetlink_rcv+0x1ba/0x460 [ 97.819787][ T9820] ? nfnetlink_rcv_batch+0x17a0/0x17a0 [ 97.825237][ T9820] ? netlink_deliver_tap+0x24a/0xbe0 [ 97.830659][ T9820] ? __kasan_check_write+0x14/0x20 [ 97.835781][ T9820] netlink_unicast+0x58c/0x7d0 [ 97.840533][ T9820] ? netlink_attachskb+0x870/0x870 [ 97.845690][ T9820] ? __sanitizer_cov_trace_cmp8+0x18/0x20 [ 97.851395][ T9820] ? __check_object_size+0x3d/0x437 [ 97.856595][ T9820] netlink_sendmsg+0x91c/0xea0 [ 97.861378][ T9820] ? netlink_unicast+0x7d0/0x7d0 [ 97.866413][ T9820] ? aa_sock_msg_perm.isra.0+0xba/0x170 [ 97.871982][ T9820] ? apparmor_socket_sendmsg+0x2a/0x30 [ 97.877559][ T9820] ? __sanitizer_cov_trace_const_cmp4+0x16/0x20 [ 97.883927][ T9820] ? security_socket_sendmsg+0x8d/0xc0 [ 97.889403][ T9820] ? netlink_unicast+0x7d0/0x7d0 [ 97.894341][ T9820] sock_sendmsg+0xd7/0x130 [ 97.898775][ T9820] ____sys_sendmsg+0x753/0x880 [ 97.903641][ T9820] ? kernel_sendmsg+0x50/0x50 [ 97.908324][ T9820] ? lockdep_init_map+0x1be/0x6d0 [ 97.913361][ T9820] ___sys_sendmsg+0x100/0x170 [ 97.918081][ T9820] ? sendmsg_copy_msghdr+0x70/0x70 [ 97.923311][ T9820] ? __kasan_check_read+0x11/0x20 [ 97.928460][ T9820] ? __lock_acquire+0x8a0/0x4a00 [ 97.933746][ T9820] ? __sanitizer_cov_trace_const_cmp4+0x16/0x20 [ 97.939975][ T9820] ? __this_cpu_preempt_check+0x35/0x190 [ 97.945607][ T9820] ? __sanitizer_cov_trace_const_cmp4+0x16/0x20 [ 97.951958][ T9820] ? percpu_counter_add_batch+0x13c/0x190 [ 97.957787][ T9820] ? __fd_install+0x1bc/0x640 [ 97.962457][ T9820] ? find_held_lock+0x35/0x130 [ 97.967214][ T9820] ? __fd_install+0x1bc/0x640 [ 97.971985][ T9820] ? __sanitizer_cov_trace_const_cmp4+0x16/0x20 [ 97.978226][ T9820] ? __fget_light+0x1a9/0x230 [ 97.982903][ T9820] ? __fdget+0x1b/0x20 [ 97.986979][ T9820] ? __sanitizer_cov_trace_const_cmp8+0x18/0x20 [ 97.993217][ T9820] __sys_sendmsg+0x105/0x1d0 [ 97.997799][ T9820] ? __sys_sendmsg_sock+0xc0/0xc0 [ 98.002938][ T9820] ? trace_hardirqs_on_thunk+0x1a/0x1c [ 98.008600][ T9820] ? do_syscall_64+0x26/0x790 [ 98.013273][ T9820] ? entry_SYSCALL_64_after_hwframe+0x49/0xbe [ 98.019510][ T9820] ? do_syscall_64+0x26/0x790 [ 98.024199][ T9820] __x64_sys_sendmsg+0x78/0xb0 [ 98.029120][ T9820] do_syscall_64+0xfa/0x790 [ 98.034061][ T9820] entry_SYSCALL_64_after_hwframe+0x49/0xbe [ 98.040815][ T9820] RIP: 0033:0x440559 [ 98.044700][ T9820] Code: 18 89 d0 c3 66 2e 0f 1f 84 00 00 00 00 00 0f 1f 00 48 89 f8 48 89 f7 48 89 d6 48 89 ca 4d 89 c2 4d 89 c8 4c 8b 4c 24 08 0f 05 <48> 3d 01 f0 ff ff 0f 83 fb 13 fc ff c3 66 2e 0f 1f 84 00 00 00 00 [ 98.064532][ T9820] RSP: 002b:00007ffed73a3618 EFLAGS: 00000246 ORIG_RAX: 000000000000002e [ 98.072938][ T9820] RAX: ffffffffffffffda RBX: 00000000004002c8 RCX: 0000000000440559 [ 98.081108][ T9820] RDX: 0000000000000080 RSI: 00000000200000c0 RDI: 0000000000000004 [ 98.090133][ T9820] RBP: 00000000006ca018 R08: 00000000004002c8 R09: 00000000004002c8 [ 98.098143][ T9820] R10: 0000000000000002 R11: 0000000000000246 R12: 0000000000401de0 [ 98.106863][ T9820] R13: 0000000000401e70 R14: 0000000000000000 R15: 0000000000000000 [ 98.116395][ T9820] Kernel Offset: disabled [ 98.120739][ T9820] Rebooting in 86400 seconds..