netlink: 5 bytes leftover after parsing attributes in process `syz-executor4'. ====================================================== WARNING: possible circular locking dependency detected 4.14.0-rc3-mm1+ #12 Not tainted ------------------------------------------------------ loop0/4101 is trying to acquire lock: (&sb->s_type->i_mutex_key#9){++++}, at: [] inode_lock include/linux/fs.h:712 [inline] (&sb->s_type->i_mutex_key#9){++++}, at: [] shmem_fallocate+0x161/0x1160 mm/shmem.c:2841 but now in release context of a crosslock acquired at the following: ((complete)&ret.event){+.+.}, at: [] submit_bio_wait+0x15e/0x200 block/bio.c:953 which lock already depends on the new lock. the existing dependency chain (in reverse order) is: -> #4 ((complete)&ret.event){+.+.}: check_prevs_add kernel/locking/lockdep.c:2020 [inline] validate_chain kernel/locking/lockdep.c:2469 [inline] __lock_acquire+0x328f/0x4620 kernel/locking/lockdep.c:3498 lock_acquire+0x1d5/0x580 kernel/locking/lockdep.c:4002 complete_acquire include/linux/completion.h:39 [inline] __wait_for_common kernel/sched/completion.c:108 [inline] wait_for_common_io kernel/sched/completion.c:128 [inline] wait_for_completion_io+0xcb/0x7b0 kernel/sched/completion.c:176 submit_bio_wait+0x15e/0x200 block/bio.c:953 blkdev_issue_zeroout+0x13c/0x1d0 block/blk-lib.c:370 sb_issue_zeroout include/linux/blkdev.h:1368 [inline] ext4_init_inode_table+0x4fd/0xdb1 fs/ext4/ialloc.c:1447 ext4_run_li_request fs/ext4/super.c:2868 [inline] ext4_lazyinit_thread+0x808/0xd30 fs/ext4/super.c:2962 kthread+0x3c9/0x4b0 kernel/kthread.c:242 ret_from_fork+0x2a/0x40 arch/x86/entry/entry_64.S:431 -> #3 (&meta_group_info[i]->alloc_sem){++++}: check_prevs_add kernel/locking/lockdep.c:2020 [inline] validate_chain kernel/locking/lockdep.c:2469 [inline] __lock_acquire+0x328f/0x4620 kernel/locking/lockdep.c:3498 lock_acquire+0x1d5/0x580 kernel/locking/lockdep.c:4002 down_read+0x96/0x150 kernel/locking/rwsem.c:23 __ext4_new_inode+0x26dc/0x4f00 fs/ext4/ialloc.c:1056 ext4_symlink+0x2d9/0xae0 fs/ext4/namei.c:3118 vfs_symlink+0x323/0x560 fs/namei.c:4115 SYSC_symlinkat fs/namei.c:4142 [inline] SyS_symlinkat fs/namei.c:4122 [inline] SYSC_symlink fs/namei.c:4155 [inline] SyS_symlink+0x134/0x200 fs/namei.c:4153 entry_SYSCALL_64_fastpath+0x1f/0xbe -> #2 (jbd2_handle){++++}: check_prevs_add kernel/locking/lockdep.c:2020 [inline] validate_chain kernel/locking/lockdep.c:2469 [inline] __lock_acquire+0x328f/0x4620 kernel/locking/lockdep.c:3498 lock_acquire+0x1d5/0x580 kernel/locking/lockdep.c:4002 start_this_handle+0x4b8/0x1080 fs/jbd2/transaction.c:390 jbd2__journal_start+0x389/0x9f0 fs/jbd2/transaction.c:444 __ext4_journal_start_sb+0x15f/0x550 fs/ext4/ext4_jbd2.c:80 __ext4_journal_start fs/ext4/ext4_jbd2.h:314 [inline] ext4_dirty_inode+0x56/0xa0 fs/ext4/inode.c:5859 __mark_inode_dirty+0x912/0x1170 fs/fs-writeback.c:2096 generic_update_time+0x1b2/0x270 fs/inode.c:1649 update_time fs/inode.c:1665 [inline] touch_atime+0x26d/0x2f0 fs/inode.c:1737 file_accessed include/linux/fs.h:2061 [inline] ext4_file_mmap+0x161/0x1b0 fs/ext4/file.c:352 call_mmap include/linux/fs.h:1775 [inline] mmap_region+0xa99/0x15a0 mm/mmap.c:1690 do_mmap+0x6a1/0xd50 mm/mmap.c:1468 do_mmap_pgoff include/linux/mm.h:2180 [inline] vm_mmap_pgoff+0x1de/0x280 mm/util.c:333 SYSC_mmap_pgoff mm/mmap.c:1518 [inline] SyS_mmap_pgoff+0x462/0x5f0 mm/mmap.c:1476 SYSC_mmap arch/x86/kernel/sys_x86_64.c:99 [inline] SyS_mmap+0x16/0x20 arch/x86/kernel/sys_x86_64.c:90 entry_SYSCALL_64_fastpath+0x1f/0xbe -> #1 (&mm->mmap_sem){++++}: check_prevs_add kernel/locking/lockdep.c:2020 [inline] validate_chain kernel/locking/lockdep.c:2469 [inline] __lock_acquire+0x328f/0x4620 kernel/locking/lockdep.c:3498 lock_acquire+0x1d5/0x580 kernel/locking/lockdep.c:4002 __might_fault+0x13a/0x1d0 mm/memory.c:4541 _copy_to_user+0x2c/0xc0 lib/usercopy.c:24 copy_to_user include/linux/uaccess.h:154 [inline] filldir+0x1a7/0x320 fs/readdir.c:196 dir_emit_dot include/linux/fs.h:3341 [inline] dir_emit_dots include/linux/fs.h:3352 [inline] dcache_readdir+0x12d/0x5e0 fs/libfs.c:193 iterate_dir+0x4b2/0x5d0 fs/readdir.c:51 SYSC_getdents fs/readdir.c:231 [inline] SyS_getdents+0x225/0x450 fs/readdir.c:212 entry_SYSCALL_64_fastpath+0x1f/0xbe -> #0 (&sb->s_type->i_mutex_key#9){++++}: down_write+0x87/0x120 kernel/locking/rwsem.c:53 inode_lock include/linux/fs.h:712 [inline] shmem_fallocate+0x161/0x1160 mm/shmem.c:2841 lo_discard drivers/block/loop.c:434 [inline] do_req_filebacked drivers/block/loop.c:575 [inline] loop_handle_cmd drivers/block/loop.c:1718 [inline] loop_queue_work+0x46f/0x3900 drivers/block/loop.c:1732 kthread_worker_fn+0x32b/0x980 kernel/kthread.c:646 loop_kthread_worker_fn+0x51/0x60 drivers/block/loop.c:841 other info that might help us debug this: Chain exists of: &sb->s_type->i_mutex_key#9 --> &meta_group_info[i]->alloc_sem --> (complete)&ret.event Possible unsafe locking scenario by crosslock: CPU0 CPU1 ---- ---- lock(&meta_group_info[i]->alloc_sem); lock((complete)&ret.event); lock(&sb->s_type->i_mutex_key#9); unlock((complete)&ret.event); *** DEADLOCK *** 1 lock held by loop0/4101: #0: (&x->wait#14){..-.}, at: [] complete+0x18/0x80 kernel/sched/completion.c:34 stack backtrace: CPU: 0 PID: 4101 Comm: loop0 Not tainted 4.14.0-rc3-mm1+ #12 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 Call Trace: __dump_stack lib/dump_stack.c:16 [inline] dump_stack+0x194/0x257 lib/dump_stack.c:52 print_circular_bug+0x503/0x710 kernel/locking/lockdep.c:1259 check_prev_add+0x865/0x1520 kernel/locking/lockdep.c:1894 commit_xhlock kernel/locking/lockdep.c:5015 [inline] commit_xhlocks kernel/locking/lockdep.c:5059 [inline] lock_commit_crosslock+0xe59/0x1d00 kernel/locking/lockdep.c:5098 complete_release_commit include/linux/completion.h:49 [inline] complete+0x24/0x80 kernel/sched/completion.c:39 submit_bio_wait_endio+0x9c/0xd0 block/bio.c:930 bio_endio+0x2f8/0x8d0 block/bio.c:1843 req_bio_endio block/blk-core.c:204 [inline] blk_update_request+0x2a6/0xe20 block/blk-core.c:2746 blk_mq_end_request+0x54/0x120 block/blk-mq.c:509 lo_complete_rq+0xbe/0x1f0 drivers/block/loop.c:463 __blk_mq_complete_request+0x38f/0x6c0 block/blk-mq.c:550 blk_mq_complete_request+0x4f/0x60 block/blk-mq.c:570 loop_handle_cmd drivers/block/loop.c:1723 [inline] loop_queue_work+0x26b/0x3900 drivers/block/loop.c:1732 kthread_worker_fn+0x32b/0x980 kernel/kthread.c:646 loop_kthread_worker_fn+0x51/0x60 drivers/block/loop.c:841 kthread+0x3c9/0x4b0 kernel/kthread.c:242 ret_from_fork+0x2a/0x40 arch/x86/entry/entry_64.S:431 QAT: Invalid ioctl QAT: Invalid ioctl QAT: Invalid ioctl netlink: 5 bytes leftover after parsing attributes in process `syz-executor0'. device syz7 entered promiscuous mode netlink: 5 bytes leftover after parsing attributes in process `syz-executor0'. kauditd_printk_skb: 58 callbacks suppressed audit: type=1326 audit(1507033881.486:161): auid=4294967295 uid=0 gid=0 ses=4294967295 subj=kernel pid=9014 comm="syz-executor1" exe="/root/syz-executor1" sig=31 arch=c000003e syscall=202 compat=0 ip=0x4520a9 code=0x0 sctp: [Deprecated]: syz-executor4 (pid 9035) Use of int in maxseg socket option. Use struct sctp_assoc_value instead device syz7 left promiscuous mode device syz7 entered promiscuous mode sctp: [Deprecated]: syz-executor4 (pid 9035) Use of int in maxseg socket option. Use struct sctp_assoc_value instead QAT: Invalid ioctl QAT: Invalid ioctl TCP: request_sock_TCP: Possible SYN flooding on port 20016. Sending cookies. Check SNMP counters. SELinux: unrecognized netlink message: protocol=4 nlmsg_type=1545 sclass=netlink_tcpdiag_socket pig=9170 comm=syz-executor4 SELinux: unrecognized netlink message: protocol=4 nlmsg_type=1545 sclass=netlink_tcpdiag_socket pig=9193 comm=syz-executor4 QAT: Invalid ioctl QAT: Invalid ioctl QAT: Invalid ioctl audit: type=1326 audit(1507033883.370:162): auid=4294967295 uid=0 gid=0 ses=4294967295 subj=kernel pid=9399 comm="syz-executor4" exe="/root/syz-executor4" sig=31 arch=c000003e syscall=202 compat=0 ip=0x4520a9 code=0xffff0000 audit: type=1326 audit(1507033883.462:163): auid=4294967295 uid=0 gid=0 ses=4294967295 subj=kernel pid=9399 comm="syz-executor4" exe="/root/syz-executor4" sig=31 arch=c000003e syscall=202 compat=0 ip=0x4520a9 code=0xffff0000 sctp: [Deprecated]: syz-executor3 (pid 9427) Use of int in max_burst socket option deprecated. Use struct sctp_assoc_value instead sctp: [Deprecated]: syz-executor3 (pid 9444) Use of int in max_burst socket option deprecated. Use struct sctp_assoc_value instead device syz6 left promiscuous mode device syz6 entered promiscuous mode netlink: 11 bytes leftover after parsing attributes in process `syz-executor7'. netlink: 11 bytes leftover after parsing attributes in process `syz-executor7'. device syz6 left promiscuous mode device syz6 entered promiscuous mode netlink: 11 bytes leftover after parsing attributes in process `syz-executor7'. netlink: 11 bytes leftover after parsing attributes in process `syz-executor7'. netlink: 3 bytes leftover after parsing attributes in process `syz-executor6'. SELinux: unrecognized netlink message: protocol=9 nlmsg_type=1025 sclass=netlink_audit_socket pig=9502 comm=syz-executor6 SELinux: unrecognized netlink message: protocol=9 nlmsg_type=1025 sclass=netlink_audit_socket pig=9524 comm=syz-executor6 netlink: 3 bytes leftover after parsing attributes in process `syz-executor6'. SELinux: unrecognized netlink message: protocol=9 nlmsg_type=1025 sclass=netlink_audit_socket pig=9524 comm=syz-executor6 SELinux: unrecognized netlink message: protocol=9 nlmsg_type=1025 sclass=netlink_audit_socket pig=9502 comm=syz-executor6 loop_reread_partitions: partition scan of loop0 (-\t@r9hxGQ[ᶈգl L* @iR-Tr-x) failed (rc=-13) netlink: 16 bytes leftover after parsing attributes in process `syz-executor1'. unregister_netdevice: waiting for lo to become free. Usage count = 3 QAT: Invalid ioctl QAT: Invalid ioctl QAT: Invalid ioctl QAT: Invalid ioctl QAT: Invalid ioctl QAT: Invalid ioctl QAT: Invalid ioctl QAT: Invalid ioctl QAT: Invalid ioctl Bearer <> rejected, not supported in standalone mode rpcbind: RPC call returned error 22 Bearer <> rejected, not supported in standalone mode rpcbind: RPC call returned error 22 do_dccp_setsockopt: sockopt(CHANGE_L/R) is deprecated: fix your app do_dccp_setsockopt: sockopt(CHANGE_L/R) is deprecated: fix your app nla_parse: 14 callbacks suppressed netlink: 5 bytes leftover after parsing attributes in process `syz-executor2'. sock: sock_set_timeout: `syz-executor7' (pid 10050) tries to set negative timeout netlink: 5 bytes leftover after parsing attributes in process `syz-executor1'. sock: sock_set_timeout: `syz-executor7' (pid 10036) tries to set negative timeout audit: type=1326 audit(1507033885.709:164): auid=4294967295 uid=0 gid=0 ses=4294967295 subj=kernel pid=10061 comm="syz-executor0" exe="/root/syz-executor0" sig=0 arch=c000003e syscall=202 compat=0 ip=0x4520a9 code=0x7ffc0000 device lo entered promiscuous mode audit: type=1326 audit(1507033885.709:165): auid=4294967295 uid=0 gid=0 ses=4294967295 subj=kernel pid=10061 comm="syz-executor0" exe="/root/syz-executor0" sig=0 arch=c000003e syscall=202 compat=0 ip=0x4520a9 code=0x7ffc0000 netlink: 5 bytes leftover after parsing attributes in process `syz-executor1'. audit: type=1326 audit(1507033885.733:166): auid=4294967295 uid=0 gid=0 ses=4294967295 subj=kernel pid=10061 comm="syz-executor0" exe="/root/syz-executor0" sig=0 arch=c000003e syscall=202 compat=0 ip=0x4520a9 code=0x7ffc0000 FAULT_INJECTION: forcing a failure. name failslab, interval 1, probability 0, space 0, times 1 CPU: 1 PID: 10107 Comm: syz-executor5 Not tainted 4.14.0-rc3-mm1+ #12 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 Call Trace: __dump_stack lib/dump_stack.c:16 [inline] dump_stack+0x194/0x257 lib/dump_stack.c:52 fail_dump lib/fault-inject.c:51 [inline] should_fail+0x8c0/0xa40 lib/fault-inject.c:149 should_failslab+0xec/0x120 mm/failslab.c:31 slab_pre_alloc_hook mm/slab.h:426 [inline] slab_alloc_node mm/slab.c:3305 [inline] kmem_cache_alloc_node+0x56/0x760 mm/slab.c:3650 __alloc_skb+0xf1/0x740 net/core/skbuff.c:194 alloc_skb include/linux/skbuff.h:977 [inline] netlink_alloc_large_skb net/netlink/af_netlink.c:1145 [inline] netlink_sendmsg+0xa86/0xe70 net/netlink/af_netlink.c:1837 sock_sendmsg_nosec net/socket.c:633 [inline] sock_sendmsg+0xca/0x110 net/socket.c:643 sock_write_iter+0x320/0x5e0 net/socket.c:912 call_write_iter include/linux/fs.h:1770 [inline] new_sync_write fs/read_write.c:468 [inline] __vfs_write+0x68a/0x970 fs/read_write.c:481 vfs_write+0x18f/0x510 fs/read_write.c:543 SYSC_write fs/read_write.c:588 [inline] SyS_write+0xef/0x220 fs/read_write.c:580 entry_SYSCALL_64_fastpath+0x1f/0xbe RIP: 0033:0x4520a9 RSP: 002b:00007f8443c02c08 EFLAGS: 00000216 ORIG_RAX: 0000000000000001 RAX: ffffffffffffffda RBX: 0000000000718000 RCX: 00000000004520a9 RDX: 0000000000000024 RSI: 0000000020d8afdc RDI: 0000000000000005 RBP: 00007f8443c02a10 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000216 R12: 00000000004b6c37 R13: 00007f8443c02b48 R14: 00000000004b6c47 R15: 0000000000000000 FAULT_INJECTION: forcing a failure. name failslab, interval 1, probability 0, space 0, times 0 CPU: 0 PID: 10116 Comm: syz-executor5 Not tainted 4.14.0-rc3-mm1+ #12 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 Call Trace: __dump_stack lib/dump_stack.c:16 [inline] dump_stack+0x194/0x257 lib/dump_stack.c:52 fail_dump lib/fault-inject.c:51 [inline] should_fail+0x8c0/0xa40 lib/fault-inject.c:149 should_failslab+0xec/0x120 mm/failslab.c:31 slab_pre_alloc_hook mm/slab.h:426 [inline] slab_alloc_node mm/slab.c:3305 [inline] kmem_cache_alloc_node_trace+0x5a/0x760 mm/slab.c:3669 __do_kmalloc_node mm/slab.c:3689 [inline] __kmalloc_node_track_caller+0x33/0x70 mm/slab.c:3704 __kmalloc_reserve.isra.40+0x41/0xd0 net/core/skbuff.c:138 __alloc_skb+0x13b/0x740 net/core/skbuff.c:206 alloc_skb include/linux/skbuff.h:977 [inline] netlink_alloc_large_skb net/netlink/af_netlink.c:1145 [inline] netlink_sendmsg+0xa86/0xe70 net/netlink/af_netlink.c:1837 sock_sendmsg_nosec net/socket.c:633 [inline] sock_sendmsg+0xca/0x110 net/socket.c:643 sock_write_iter+0x320/0x5e0 net/socket.c:912 call_write_iter include/linux/fs.h:1770 [inline] new_sync_write fs/read_write.c:468 [inline] __vfs_write+0x68a/0x970 fs/read_write.c:481 vfs_write+0x18f/0x510 fs/read_write.c:543 SYSC_write fs/read_write.c:588 [inline] SyS_write+0xef/0x220 fs/read_write.c:580 entry_SYSCALL_64_fastpath+0x1f/0xbe RIP: 0033:0x4520a9 RSP: 002b:00007f8443c02c08 EFLAGS: 00000216 ORIG_RAX: 0000000000000001 RAX: ffffffffffffffda RBX: 0000000000718000 RCX: 00000000004520a9 RDX: 0000000000000024 RSI: 0000000020d8afdc RDI: 0000000000000005 RBP: 00007f8443c02a10 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000216 R12: 00000000004b6c37 R13: 00007f8443c02b48 R14: 00000000004b6c47 R15: 0000000000000000 FAULT_INJECTION: forcing a failure. name failslab, interval 1, probability 0, space 0, times 0 CPU: 1 PID: 10123 Comm: syz-executor5 Not tainted 4.14.0-rc3-mm1+ #12 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 Call Trace: __dump_stack lib/dump_stack.c:16 [inline] dump_stack+0x194/0x257 lib/dump_stack.c:52 fail_dump lib/fault-inject.c:51 [inline] should_fail+0x8c0/0xa40 lib/fault-inject.c:149 should_failslab+0xec/0x120 mm/failslab.c:31 slab_pre_alloc_hook mm/slab.h:426 [inline] slab_alloc_node mm/slab.c:3305 [inline] kmem_cache_alloc_node+0x56/0x760 mm/slab.c:3650 __alloc_skb+0xf1/0x740 net/core/skbuff.c:194 alloc_skb include/linux/skbuff.h:977 [inline] nlmsg_new include/net/netlink.h:510 [inline] netlink_ack+0x183/0xab0 net/netlink/af_netlink.c:2333 netlink_rcv_skb+0x361/0x440 net/netlink/af_netlink.c:2411 rtnetlink_rcv+0x1c/0x20 net/core/rtnetlink.c:4304 netlink_unicast_kernel net/netlink/af_netlink.c:1273 [inline] netlink_unicast+0x4e8/0x6f0 net/netlink/af_netlink.c:1299 netlink_sendmsg+0xa4a/0xe70 net/netlink/af_netlink.c:1862 sock_sendmsg_nosec net/socket.c:633 [inline] sock_sendmsg+0xca/0x110 net/socket.c:643 sock_write_iter+0x320/0x5e0 net/socket.c:912 call_write_iter include/linux/fs.h:1770 [inline] new_sync_write fs/read_write.c:468 [inline] __vfs_write+0x68a/0x970 fs/read_write.c:481 vfs_write+0x18f/0x510 fs/read_write.c:543 SYSC_write fs/read_write.c:588 [inline] SyS_write+0xef/0x220 fs/read_write.c:580 entry_SYSCALL_64_fastpath+0x1f/0xbe RIP: 0033:0x4520a9 RSP: 002b:00007f8443c02c08 EFLAGS: 00000216 ORIG_RAX: 0000000000000001 RAX: ffffffffffffffda RBX: 0000000000718000 RCX: 00000000004520a9 RDX: 0000000000000024 RSI: 0000000020d8afdc RDI: 0000000000000005 RBP: 00007f8443c02a10 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000216 R12: 00000000004b6c37 R13: 00007f8443c02b48 R14: 00000000004b6c47 R15: 0000000000000000 audit: type=1326 audit(1507033885.733:167): auid=4294967295 uid=0 gid=0 ses=4294967295 subj=kernel pid=10061 comm="syz-executor0" exe="/root/syz-executor0" sig=0 arch=c000003e syscall=228 compat=0 ip=0x454e4a code=0x7ffc0000 audit: type=1326 audit(1507033885.733:168): auid=4294967295 uid=0 gid=0 ses=4294967295 subj=kernel pid=10061 comm="syz-executor0" exe="/root/syz-executor0" sig=0 arch=c000003e syscall=202 compat=0 ip=0x4520a9 code=0x7ffc0000 audit: type=1326 audit(1507033885.735:169): auid=4294967295 uid=0 gid=0 ses=4294967295 subj=kernel pid=10061 comm="syz-executor0" exe="/root/syz-executor0" sig=0 arch=c000003e syscall=54 compat=0 ip=0x4520a9 code=0x7ffc0000 audit: type=1326 audit(1507033885.735:170): auid=4294967295 uid=0 gid=0 ses=4294967295 subj=kernel pid=10061 comm="syz-executor0" exe="/root/syz-executor0" sig=0 arch=c000003e syscall=202 compat=0 ip=0x4520a9 code=0x7ffc0000 audit: type=1326 audit(1507033885.735:171): auid=4294967295 uid=0 gid=0 ses=4294967295 subj=kernel pid=10061 comm="syz-executor0" exe="/root/syz-executor0" sig=0 arch=c000003e syscall=202 compat=0 ip=0x4520a9 code=0x7ffc0000 audit: type=1326 audit(1507033885.735:172): auid=4294967295 uid=0 gid=0 ses=4294967295 subj=kernel pid=10061 comm="syz-executor0" exe="/root/syz-executor0" sig=0 arch=c000003e syscall=202 compat=0 ip=0x4520a9 code=0x7ffc0000 audit: type=1326 audit(1507033885.735:173): auid=4294967295 uid=0 gid=0 ses=4294967295 subj=kernel pid=10061 comm="syz-executor0" exe="/root/syz-executor0" sig=0 arch=c000003e syscall=228 compat=0 ip=0x454e4a code=0x7ffc0000 audit: type=1326 audit(1507033885.735:174): auid=4294967295 uid=0 gid=0 ses=4294967295 subj=kernel pid=10061 comm="syz-executor0" exe="/root/syz-executor0" sig=0 arch=c000003e syscall=202 compat=0 ip=0x4520a9 code=0x7ffc0000 audit: type=1326 audit(1507033885.742:175): auid=4294967295 uid=0 gid=0 ses=4294967295 subj=kernel pid=10061 comm="syz-executor0" exe="/root/syz-executor0" sig=0 arch=c000003e syscall=257 compat=0 ip=0x4520a9 code=0x7ffc0000 audit: type=1326 audit(1507033885.742:176): auid=4294967295 uid=0 gid=0 ses=4294967295 subj=kernel pid=10061 comm="syz-executor0" exe="/root/syz-executor0" sig=0 arch=c000003e syscall=202 compat=0 ip=0x4520a9 code=0x7ffc0000 FAULT_INJECTION: forcing a failure. name failslab, interval 1, probability 0, space 0, times 0 CPU: 0 PID: 10148 Comm: syz-executor5 Not tainted 4.14.0-rc3-mm1+ #12 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 Call Trace: __dump_stack lib/dump_stack.c:16 [inline] dump_stack+0x194/0x257 lib/dump_stack.c:52 fail_dump lib/fault-inject.c:51 [inline] should_fail+0x8c0/0xa40 lib/fault-inject.c:149 should_failslab+0xec/0x120 mm/failslab.c:31 slab_pre_alloc_hook mm/slab.h:426 [inline] slab_alloc_node mm/slab.c:3305 [inline] kmem_cache_alloc_node_trace+0x5a/0x760 mm/slab.c:3669 __do_kmalloc_node mm/slab.c:3689 [inline] __kmalloc_node_track_caller+0x33/0x70 mm/slab.c:3704 __kmalloc_reserve.isra.40+0x41/0xd0 net/core/skbuff.c:138 __alloc_skb+0x13b/0x740 net/core/skbuff.c:206 alloc_skb include/linux/skbuff.h:977 [inline] nlmsg_new include/net/netlink.h:510 [inline] netlink_ack+0x183/0xab0 net/netlink/af_netlink.c:2333 netlink_rcv_skb+0x361/0x440 net/netlink/af_netlink.c:2411 rtnetlink_rcv+0x1c/0x20 net/core/rtnetlink.c:4304 netlink_unicast_kernel net/netlink/af_netlink.c:1273 [inline] netlink_unicast+0x4e8/0x6f0 net/netlink/af_netlink.c:1299 netlink_sendmsg+0xa4a/0xe70 net/netlink/af_netlink.c:1862 sock_sendmsg_nosec net/socket.c:633 [inline] sock_sendmsg+0xca/0x110 net/socket.c:643 sock_write_iter+0x320/0x5e0 net/socket.c:912 call_write_iter include/linux/fs.h:1770 [inline] new_sync_write fs/read_write.c:468 [inline] __vfs_write+0x68a/0x970 fs/read_write.c:481 vfs_write+0x18f/0x510 fs/read_write.c:543 SYSC_write fs/read_write.c:588 [inline] SyS_write+0xef/0x220 fs/read_write.c:580 entry_SYSCALL_64_fastpath+0x1f/0xbe RIP: 0033:0x4520a9 RSP: 002b:00007f8443c02c08 EFLAGS: 00000216 ORIG_RAX: 0000000000000001 RAX: ffffffffffffffda RBX: 0000000000718000 RCX: 00000000004520a9 RDX: 0000000000000024 RSI: 0000000020d8afdc RDI: 0000000000000005 RBP: 00007f8443c02a10 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000216 R12: 00000000004b6c37 R13: 00007f8443c02b48 R14: 00000000004b6c47 R15: 0000000000000000 netlink: 5 bytes leftover after parsing attributes in process `syz-executor6'. netlink: 5 bytes leftover after parsing attributes in process `syz-executor6'. netlink: 6 bytes leftover after parsing attributes in process `syz-executor7'. sctp: [Deprecated]: syz-executor1 (pid 10216) Use of struct sctp_assoc_value in delayed_ack socket option. Use struct sctp_sack_info instead netlink: 6 bytes leftover after parsing attributes in process `syz-executor7'. sctp: [Deprecated]: syz-executor1 (pid 10233) Use of struct sctp_assoc_value in delayed_ack socket option. Use struct sctp_sack_info instead netlink: 5 bytes leftover after parsing attributes in process `syz-executor0'. netlink: 5 bytes leftover after parsing attributes in process `syz-executor0'. irq bypass consumer (token ffff8801c7b2d000) registration fails: -16 print_req_error: 301 callbacks suppressed print_req_error: I/O error, dev loop0, sector 0 print_req_error: I/O error, dev loop0, sector 0 buffer_io_error: 297 callbacks suppressed Buffer I/O error on dev loop0, logical block 0, async page read print_req_error: I/O error, dev loop0, sector 0 Buffer I/O error on dev loop0, logical block 0, async page read print_req_error: I/O error, dev loop0, sector 0 Buffer I/O error on dev loop0, logical block 0, async page read print_req_error: I/O error, dev loop0, sector 0 Buffer I/O error on dev loop0, logical block 0, async page read print_req_error: I/O error, dev loop0, sector 0 sg_write: data in/out 452821891/51 bytes for SCSI command 0x8f-- guessing data in; program syz-executor7 not setting count and/or reply_len properly netlink: 1 bytes leftover after parsing attributes in process `syz-executor3'. sg_write: data in/out 452821891/51 bytes for SCSI command 0x8f-- guessing data in; program syz-executor7 not setting count and/or reply_len properly Buffer I/O error on dev loop0, logical block 0, async page read print_req_error: I/O error, dev loop0, sector 0 Buffer I/O error on dev loop0, logical block 0, async page read print_req_error: I/O error, dev loop0, sector 0 Buffer I/O error on dev loop0, logical block 0, async page read print_req_error: I/O error, dev loop0, sector 0 Buffer I/O error on dev loop0, logical block 0, async page read print_req_error: I/O error, dev loop0, sector 0 Buffer I/O error on dev loop0, logical block 0, async page read Buffer I/O error on dev loop0, logical block 0, async page read dccp_v4_rcv: dropped packet with invalid checksum QAT: Invalid ioctl QAT: Invalid ioctl dccp_v4_rcv: dropped packet with invalid checksum SELinux: unrecognized netlink message: protocol=0 nlmsg_type=1829 sclass=netlink_route_socket pig=10584 comm=syz-executor5 sctp: [Deprecated]: syz-executor7 (pid 10596) Use of struct sctp_assoc_value in delayed_ack socket option. Use struct sctp_sack_info instead sctp: [Deprecated]: syz-executor7 (pid 10596) Use of struct sctp_assoc_value in delayed_ack socket option. Use struct sctp_sack_info instead SELinux: unrecognized netlink message: protocol=0 nlmsg_type=0 sclass=netlink_route_socket pig=10644 comm=syz-executor5 SELinux: unrecognized netlink message: protocol=0 nlmsg_type=0 sclass=netlink_route_socket pig=10647 comm=syz-executor5 sctp: [Deprecated]: syz-executor7 (pid 10667) Use of struct sctp_assoc_value in delayed_ack socket option. Use struct sctp_sack_info instead sctp: [Deprecated]: syz-executor7 (pid 10667) Use of struct sctp_assoc_value in delayed_ack socket option. Use struct sctp_sack_info instead sctp: [Deprecated]: syz-executor7 (pid 10728) Use of struct sctp_assoc_value in delayed_ack socket option. Use struct sctp_sack_info instead sctp: [Deprecated]: syz-executor7 (pid 10728) Use of struct sctp_assoc_value in delayed_ack socket option. Use struct sctp_sack_info instead rfkill: input handler disabled