Warning: Permanently added '10.128.0.191' (ECDSA) to the list of known hosts. [ 45.378926] random: sshd: uninitialized urandom read (32 bytes read) [ 45.505202] audit: type=1400 audit(1584547305.820:36): avc: denied { map } for pid=7472 comm="syz-executor195" path="/root/syz-executor195313127" dev="sda1" ino=16484 scontext=unconfined_u:system_r:insmod_t:s0-s0:c0.c1023 tcontext=unconfined_u:object_r:user_home_t:s0 tclass=file permissive=1 [ 45.781106] IPVS: ftp: loaded support on port[0] = 21 executing program [ 46.549364] ================================================================== [ 46.557008] BUG: KASAN: slab-out-of-bounds in tcindex_set_parms+0x1521/0x16a0 [ 46.564268] Write of size 16 at addr ffff8880a935d470 by task syz-executor195/7473 [ 46.571953] [ 46.573600] CPU: 0 PID: 7473 Comm: syz-executor195 Not tainted 4.14.173-syzkaller #0 [ 46.581471] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 46.590816] Call Trace: [ 46.593402] dump_stack+0x13e/0x194 [ 46.597009] ? tcindex_set_parms+0x1521/0x16a0 [ 46.601570] print_address_description.cold+0x7c/0x1e2 [ 46.606836] ? tcindex_set_parms+0x1521/0x16a0 [ 46.611396] kasan_report.cold+0xa9/0x2ae [ 46.615522] tcindex_set_parms+0x1521/0x16a0 [ 46.619915] ? tcindex_alloc_perfect_hash+0x300/0x300 [ 46.625101] ? avc_has_perm_noaudit+0x297/0x400 [ 46.629754] ? nla_parse+0x183/0x240 [ 46.633446] tcindex_change+0x1b5/0x270 [ 46.637401] ? tcindex_set_parms+0x16a0/0x16a0 [ 46.641967] ? tcindex_lookup+0x8c/0x310 [ 46.646005] ? tcindex_set_parms+0x16a0/0x16a0 [ 46.650563] tc_ctl_tfilter+0xf13/0x18e6 [ 46.654607] ? tfilter_notify+0x240/0x240 [ 46.658733] ? mutex_trylock+0x1a0/0x1a0 [ 46.662774] ? rtnetlink_rcv_msg+0x2e8/0xb10 [ 46.667181] ? tfilter_notify+0x240/0x240 [ 46.671362] rtnetlink_rcv_msg+0x3be/0xb10 [ 46.675632] ? rtnl_bridge_getlink+0x7a0/0x7a0 [ 46.680209] ? save_trace+0x290/0x290 [ 46.684041] ? save_trace+0x290/0x290 [ 46.687826] netlink_rcv_skb+0x127/0x370 [ 46.691883] ? rtnl_bridge_getlink+0x7a0/0x7a0 [ 46.696504] ? netlink_ack+0x960/0x960 [ 46.700382] netlink_unicast+0x437/0x620 [ 46.704425] ? netlink_attachskb+0x600/0x600 [ 46.708819] netlink_sendmsg+0x733/0xbe0 [ 46.712864] ? netlink_unicast+0x620/0x620 [ 46.717080] ? SYSC_sendto+0x2b0/0x2b0 [ 46.720952] ? security_socket_sendmsg+0x83/0xb0 [ 46.725724] ? netlink_unicast+0x620/0x620 [ 46.729943] sock_sendmsg+0xc5/0x100 [ 46.733640] ___sys_sendmsg+0x70a/0x840 [ 46.737595] ? copy_msghdr_from_user+0x380/0x380 [ 46.742334] ? trace_hardirqs_on+0x10/0x10 [ 46.746563] ? save_trace+0x290/0x290 [ 46.750343] ? find_held_lock+0x2d/0x110 [ 46.754398] ? __might_fault+0x104/0x1b0 [ 46.758438] ? lock_acquire+0x170/0x3f0 [ 46.762394] ? lock_downgrade+0x6e0/0x6e0 [ 46.766522] ? __might_fault+0x177/0x1b0 [ 46.770577] ? _copy_to_user+0x82/0xd0 [ 46.774445] ? __fget_light+0x16a/0x1f0 [ 46.778399] ? sockfd_lookup_light+0xb2/0x160 [ 46.782895] __sys_sendmsg+0xa3/0x120 [ 46.786678] ? SyS_shutdown+0x160/0x160 [ 46.790639] ? up_read+0x17/0x30 [ 46.793994] ? __do_page_fault+0x35b/0xb40 [ 46.798208] SyS_sendmsg+0x27/0x40 [ 46.801728] ? __sys_sendmsg+0x120/0x120 [ 46.805767] do_syscall_64+0x1d5/0x640 [ 46.809637] entry_SYSCALL_64_after_hwframe+0x42/0xb7 [ 46.814805] RIP: 0033:0x440e79 [ 46.817998] RSP: 002b:00007fff1171bcb8 EFLAGS: 00000246 ORIG_RAX: 000000000000002e [ 46.825684] RAX: ffffffffffffffda RBX: 00000000004a2650 RCX: 0000000000440e79 [ 46.832946] RDX: 0000000000000000 RSI: 00000000200001c0 RDI: 0000000000000003 [ 46.840210] RBP: 00007fff1171bcc0 R08: 0000000120080522 R09: 0000000120080522 [ 46.847478] R10: 0000000120080522 R11: 0000000000000246 R12: 00000000004a2650 [ 46.854757] R13: 0000000000402410 R14: 0000000000000000 R15: 0000000000000000 [ 46.862034] [ 46.863647] Allocated by task 7473: [ 46.867258] save_stack+0x32/0xa0 [ 46.870690] kasan_kmalloc+0xbf/0xe0 [ 46.874405] kmem_cache_alloc_trace+0x14d/0x7b0 [ 46.879054] sock_alloc_inode+0x5f/0x250 [ 46.883097] alloc_inode+0x5d/0x170 [ 46.886698] new_inode_pseudo+0x14/0xe0 [ 46.890664] sock_alloc+0x3c/0x270 [ 46.894184] __sock_create+0x89/0x620 [ 46.897961] SyS_socket+0xd2/0x170 [ 46.901480] do_syscall_64+0x1d5/0x640 [ 46.905364] entry_SYSCALL_64_after_hwframe+0x42/0xb7 [ 46.910529] [ 46.912151] Freed by task 400: [ 46.915324] save_stack+0x32/0xa0 [ 46.918755] kasan_slab_free+0x75/0xc0 [ 46.922635] kfree+0xcb/0x260 [ 46.925735] umh_complete+0x6d/0x80 [ 46.929336] call_usermodehelper_exec_async+0x413/0x4c0 [ 46.934677] ret_from_fork+0x24/0x30 [ 46.938366] [ 46.939973] The buggy address belongs to the object at ffff8880a935d3c0 [ 46.939973] which belongs to the cache kmalloc-128 of size 128 [ 46.953224] The buggy address is located 48 bytes to the right of [ 46.953224] 128-byte region [ffff8880a935d3c0, ffff8880a935d440) [ 46.965537] The buggy address belongs to the page: [ 46.970503] page:ffffea0002a4d740 count:1 mapcount:0 mapping:ffff8880a935d000 index:0x0 [ 46.978689] flags: 0xfffe0000000100(slab) [ 46.982822] raw: 00fffe0000000100 ffff8880a935d000 0000000000000000 0000000100000015 [ 46.990698] raw: ffffea0002a4d360 ffffea0002a4daa0 ffff88812fe56640 0000000000000000 [ 46.998557] page dumped because: kasan: bad access detected [ 47.004243] [ 47.005850] Memory state around the buggy address: [ 47.010772] ffff8880a935d300: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 fc fc [ 47.018113] ffff8880a935d380: fc fc fc fc fc fc fc fc 00 00 00 00 00 00 00 00 [ 47.025450] >ffff8880a935d400: 00 00 00 00 00 00 00 00 fc fc fc fc fc fc fc fc [ 47.032794] ^ [ 47.039822] ffff8880a935d480: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 47.047297] ffff8880a935d500: fc fc fc fc fc fc fc fc 00 00 00 00 00 00 00 00 [ 47.054649] ================================================================== [ 47.061991] Disabling lock debugging due to kernel taint [ 47.067654] Kernel panic - not syncing: panic_on_warn set ... [ 47.067654] [ 47.075018] CPU: 0 PID: 7473 Comm: syz-executor195 Tainted: G B 4.14.173-syzkaller #0 [ 47.084098] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 47.093444] Call Trace: [ 47.096032] dump_stack+0x13e/0x194 [ 47.099646] panic+0x1f9/0x42d [ 47.102818] ? add_taint.cold+0x16/0x16 [ 47.106772] ? tcindex_set_parms+0x1521/0x16a0 [ 47.111335] kasan_end_report+0x43/0x49 [ 47.115287] kasan_report.cold+0x12f/0x2ae [ 47.119519] tcindex_set_parms+0x1521/0x16a0 [ 47.123955] ? tcindex_alloc_perfect_hash+0x300/0x300 [ 47.129179] ? avc_has_perm_noaudit+0x297/0x400 [ 47.133838] ? nla_parse+0x183/0x240 [ 47.137652] tcindex_change+0x1b5/0x270 [ 47.141621] ? tcindex_set_parms+0x16a0/0x16a0 [ 47.146201] ? tcindex_lookup+0x8c/0x310 [ 47.150250] ? tcindex_set_parms+0x16a0/0x16a0 [ 47.154832] tc_ctl_tfilter+0xf13/0x18e6 [ 47.158881] ? tfilter_notify+0x240/0x240 [ 47.163026] ? mutex_trylock+0x1a0/0x1a0 [ 47.167083] ? rtnetlink_rcv_msg+0x2e8/0xb10 [ 47.171646] ? tfilter_notify+0x240/0x240 [ 47.175829] rtnetlink_rcv_msg+0x3be/0xb10 [ 47.180054] ? rtnl_bridge_getlink+0x7a0/0x7a0 [ 47.184640] ? save_trace+0x290/0x290 [ 47.188585] ? save_trace+0x290/0x290 [ 47.192391] netlink_rcv_skb+0x127/0x370 [ 47.196440] ? rtnl_bridge_getlink+0x7a0/0x7a0 [ 47.201011] ? netlink_ack+0x960/0x960 [ 47.204898] netlink_unicast+0x437/0x620 [ 47.208981] ? netlink_attachskb+0x600/0x600 [ 47.213384] netlink_sendmsg+0x733/0xbe0 [ 47.217429] ? netlink_unicast+0x620/0x620 [ 47.221651] ? SYSC_sendto+0x2b0/0x2b0 [ 47.225569] ? security_socket_sendmsg+0x83/0xb0 [ 47.230316] ? netlink_unicast+0x620/0x620 [ 47.234547] sock_sendmsg+0xc5/0x100 [ 47.238252] ___sys_sendmsg+0x70a/0x840 [ 47.242218] ? copy_msghdr_from_user+0x380/0x380 [ 47.247135] ? trace_hardirqs_on+0x10/0x10 [ 47.251350] ? save_trace+0x290/0x290 [ 47.255174] ? find_held_lock+0x2d/0x110 [ 47.259245] ? __might_fault+0x104/0x1b0 [ 47.263294] ? lock_acquire+0x170/0x3f0 [ 47.267273] ? lock_downgrade+0x6e0/0x6e0 [ 47.271403] ? __might_fault+0x177/0x1b0 [ 47.275456] ? _copy_to_user+0x82/0xd0 [ 47.279327] ? __fget_light+0x16a/0x1f0 [ 47.283291] ? sockfd_lookup_light+0xb2/0x160 [ 47.287939] __sys_sendmsg+0xa3/0x120 [ 47.291724] ? SyS_shutdown+0x160/0x160 [ 47.295798] ? up_read+0x17/0x30 [ 47.299155] ? __do_page_fault+0x35b/0xb40 [ 47.303383] SyS_sendmsg+0x27/0x40 [ 47.306951] ? __sys_sendmsg+0x120/0x120 [ 47.310995] do_syscall_64+0x1d5/0x640 [ 47.314875] entry_SYSCALL_64_after_hwframe+0x42/0xb7 [ 47.320056] RIP: 0033:0x440e79 [ 47.323236] RSP: 002b:00007fff1171bcb8 EFLAGS: 00000246 ORIG_RAX: 000000000000002e [ 47.331075] RAX: ffffffffffffffda RBX: 00000000004a2650 RCX: 0000000000440e79 [ 47.338380] RDX: 0000000000000000 RSI: 00000000200001c0 RDI: 0000000000000003 [ 47.345652] RBP: 00007fff1171bcc0 R08: 0000000120080522 R09: 0000000120080522 [ 47.352991] R10: 0000000120080522 R11: 0000000000000246 R12: 00000000004a2650 [ 47.360261] R13: 0000000000402410 R14: 0000000000000000 R15: 0000000000000000 [ 47.368921] Kernel Offset: disabled [ 47.372555] Rebooting in 86400 seconds..