Use struct sctp_sack_info instead ====================================================== WARNING: possible circular locking dependency detected 4.14.0-rc1+ #61 Not tainted ------------------------------------------------------ kworker/u4:1/21 is trying to acquire lock: ((&(&cp->cp_send_w)->work)){+.+.}, at: [] flush_work+0x99/0x8f0 kernel/workqueue.c:2883 but task is already holding lock: (k-sk_lock-AF_INET){+.+.}, at: [] lock_sock include/net/sock.h:1459 [inline] (k-sk_lock-AF_INET){+.+.}, at: [] rds_tcp_reset_callbacks+0x1dc/0x580 net/rds/tcp.c:165 which lock already depends on the new lock. the existing dependency chain (in reverse order) is: -> #1 (k-sk_lock-AF_INET){+.+.}: 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 lock_sock_nested+0xc2/0x110 net/core/sock.c:2762 lock_sock include/net/sock.h:1459 [inline] do_tcp_setsockopt.isra.35+0x142/0x1fd0 net/ipv4/tcp.c:2532 tcp_setsockopt+0xb0/0xd0 net/ipv4/tcp.c:2801 sock_common_setsockopt+0x95/0xd0 net/core/sock.c:2960 kernel_setsockopt+0x100/0x1c0 net/socket.c:3376 rds_tcp_cork net/rds/tcp_send.c:43 [inline] rds_tcp_xmit_path_prepare+0xe9/0x140 net/rds/tcp_send.c:50 rds_send_xmit+0x355/0x22d0 net/rds/send.c:187 rds_send_worker+0x115/0x2a0 net/rds/threads.c:189 process_one_work+0xbfa/0x1bd0 kernel/workqueue.c:2119 worker_thread+0x223/0x1860 kernel/workqueue.c:2253 kthread+0x39c/0x470 kernel/kthread.c:231 ret_from_fork+0x2a/0x40 arch/x86/entry/entry_64.S:431 -> #0 ((&(&cp->cp_send_w)->work)){+.+.}: check_prev_add+0x865/0x1520 kernel/locking/lockdep.c:1894 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 flush_work+0xcc/0x8f0 kernel/workqueue.c:2886 __cancel_work_timer+0x30a/0x7e0 kernel/workqueue.c:2961 cancel_delayed_work_sync+0x1a/0x20 kernel/workqueue.c:3081 rds_tcp_reset_callbacks+0x1e8/0x580 net/rds/tcp.c:167 rds_tcp_accept_one+0x881/0xd70 net/rds/tcp_listen.c:186 rds_tcp_accept_worker+0x57/0x80 net/rds/tcp.c:406 process_one_work+0xbfa/0x1bd0 kernel/workqueue.c:2119 worker_thread+0x223/0x1860 kernel/workqueue.c:2253 kthread+0x39c/0x470 kernel/kthread.c:231 ret_from_fork+0x2a/0x40 arch/x86/entry/entry_64.S:431 other info that might help us debug this: Possible unsafe locking scenario: CPU0 CPU1 ---- ---- lock(k-sk_lock-AF_INET); lock((&(&cp->cp_send_w)->work)); lock(k-sk_lock-AF_INET); lock((&(&cp->cp_send_w)->work)); *** DEADLOCK *** 4 locks held by kworker/u4:1/21: #0: ("%s""krdsd"){+.+.}, at: [] __write_once_size include/linux/compiler.h:305 [inline] #0: ("%s""krdsd"){+.+.}, at: [] atomic64_set arch/x86/include/asm/atomic64_64.h:33 [inline] #0: ("%s""krdsd"){+.+.}, at: [] atomic_long_set include/asm-generic/atomic-long.h:56 [inline] #0: ("%s""krdsd"){+.+.}, at: [] set_work_data kernel/workqueue.c:617 [inline] #0: ("%s""krdsd"){+.+.}, at: [] set_work_pool_and_clear_pending kernel/workqueue.c:644 [inline] #0: ("%s""krdsd"){+.+.}, at: [] process_one_work+0xad4/0x1bd0 kernel/workqueue.c:2090 #1: ((&rtn->rds_tcp_accept_w)){+.+.}, at: [] process_one_work+0xb2c/0x1bd0 kernel/workqueue.c:2094 #2: (&tc->t_conn_path_lock){+.+.}, at: [] rds_tcp_accept_one+0x739/0xd70 net/rds/tcp_listen.c:178 #3: (k-sk_lock-AF_INET){+.+.}, at: [] lock_sock include/net/sock.h:1459 [inline] #3: (k-sk_lock-AF_INET){+.+.}, at: [] rds_tcp_reset_callbacks+0x1dc/0x580 net/rds/tcp.c:165 stack backtrace: CPU: 0 PID: 21 Comm: kworker/u4:1 Not tainted 4.14.0-rc1+ #61 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 Workqueue: krdsd rds_tcp_accept_worker 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 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 flush_work+0xcc/0x8f0 kernel/workqueue.c:2886 __cancel_work_timer+0x30a/0x7e0 kernel/workqueue.c:2961 cancel_delayed_work_sync+0x1a/0x20 kernel/workqueue.c:3081 rds_tcp_reset_callbacks+0x1e8/0x580 net/rds/tcp.c:167 rds_tcp_accept_one+0x881/0xd70 net/rds/tcp_listen.c:186 rds_tcp_accept_worker+0x57/0x80 net/rds/tcp.c:406 process_one_work+0xbfa/0x1bd0 kernel/workqueue.c:2119 worker_thread+0x223/0x1860 kernel/workqueue.c:2253 kthread+0x39c/0x470 kernel/kthread.c:231 ret_from_fork+0x2a/0x40 arch/x86/entry/entry_64.S:431 FAULT_INJECTION: forcing a failure. name failslab, interval 1, probability 0, space 0, times 1 CPU: 1 PID: 2510 Comm: syz-executor5 Not tainted 4.14.0-rc1+ #61 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:422 [inline] slab_alloc_node mm/slab.c:3304 [inline] kmem_cache_alloc_node_trace+0x5a/0x760 mm/slab.c:3668 kmalloc_node include/linux/slab.h:531 [inline] kzalloc_node include/linux/slab.h:677 [inline] __get_vm_area_node+0xae/0x340 mm/vmalloc.c:1402 __vmalloc_node_range+0xa3/0x730 mm/vmalloc.c:1760 __vmalloc_node mm/vmalloc.c:1810 [inline] __vmalloc+0x45/0x50 mm/vmalloc.c:1816 bpf_prog_alloc+0xa6/0x310 kernel/bpf/core.c:84 __get_filter+0xe0/0x220 net/core/filter.c:1275 sk_attach_filter+0x1d/0x80 net/core/filter.c:1310 sock_setsockopt+0xfde/0x1ae0 net/core/sock.c:926 SYSC_setsockopt net/socket.c:1848 [inline] SyS_setsockopt+0x2ff/0x360 net/socket.c:1831 entry_SYSCALL_64_fastpath+0x1f/0xbe RIP: 0033:0x4520a9 RSP: 002b:00007f26963c4c08 EFLAGS: 00000216 ORIG_RAX: 0000000000000036 RAX: ffffffffffffffda RBX: 0000000000718000 RCX: 00000000004520a9 RDX: 000000000000001a RSI: 0000000000000001 RDI: 0000000000000006 RBP: 00007f26963c4a10 R08: 0000000000000010 R09: 0000000000000000 R10: 0000000020912ff0 R11: 0000000000000216 R12: 00000000004b6c37 R13: 00007f26963c4b48 R14: 00000000004b6c47 R15: 0000000000000000 syz-executor5: vmalloc: allocation failure: 4096 bytes, mode:0x14080c0(GFP_KERNEL|__GFP_ZERO), nodemask=(null) syz-executor5 cpuset=/ mems_allowed=0 CPU: 1 PID: 2510 Comm: syz-executor5 Not tainted 4.14.0-rc1+ #61 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 warn_alloc+0x1c2/0x2f0 mm/page_alloc.c:3254 __vmalloc_node_range+0x599/0x730 mm/vmalloc.c:1781 __vmalloc_node mm/vmalloc.c:1810 [inline] __vmalloc+0x45/0x50 mm/vmalloc.c:1816 bpf_prog_alloc+0xa6/0x310 kernel/bpf/core.c:84 __get_filter+0xe0/0x220 net/core/filter.c:1275 sk_attach_filter+0x1d/0x80 net/core/filter.c:1310 sock_setsockopt+0xfde/0x1ae0 net/core/sock.c:926 SYSC_setsockopt net/socket.c:1848 [inline] SyS_setsockopt+0x2ff/0x360 net/socket.c:1831 entry_SYSCALL_64_fastpath+0x1f/0xbe RIP: 0033:0x4520a9 RSP: 002b:00007f26963c4c08 EFLAGS: 00000216 ORIG_RAX: 0000000000000036 RAX: ffffffffffffffda RBX: 0000000000718000 RCX: 00000000004520a9 RDX: 000000000000001a RSI: 0000000000000001 RDI: 0000000000000006 RBP: 00007f26963c4a10 R08: 0000000000000010 R09: 0000000000000000 R10: 0000000020912ff0 R11: 0000000000000216 R12: 00000000004b6c37 R13: 00007f26963c4b48 R14: 00000000004b6c47 R15: 0000000000000000 warn_alloc_show_mem: 1 callbacks suppressed Mem-Info: active_anon:78650 inactive_anon:31 isolated_anon:0 active_file:6067 inactive_file:7343 isolated_file:0 unevictable:0 dirty:259 writeback:0 unstable:0 slab_reclaimable:7518 slab_unreclaimable:93862 mapped:22425 shmem:38 pagetables:739 bounce:0 free:1414239 free_pcp:402 free_cma:0 Node 0 active_anon:316684kB inactive_anon:124kB active_file:24268kB inactive_file:29372kB unevictable:0kB isolated(anon):0kB isolated(file):0kB mapped:89600kB dirty:1036kB writeback:0kB shmem:152kB shmem_thp: 0kB shmem_pmdmapped: 0kB anon_thp: 51200kB writeback_tmp:0kB unstable:0kB all_unreclaimable? no Node 0 DMA free:15908kB min:160kB low:200kB high:240kB active_anon:0kB inactive_anon:0kB active_file:0kB inactive_file:0kB unevictable:0kB writepending:0kB present:15992kB managed:15908kB mlocked:0kB kernel_stack:0kB pagetables:0kB bounce:0kB free_pcp:0kB local_pcp:0kB free_cma:0kB lowmem_reserve[]: 0 2886 6399 6399 Node 0 DMA32 free:2957428kB min:30408kB low:38008kB high:45608kB active_anon:0kB inactive_anon:0kB active_file:0kB inactive_file:0kB unevictable:0kB writepending:0kB present:3129332kB managed:2958156kB mlocked:0kB kernel_stack:0kB pagetables:0kB bounce:0kB free_pcp:728kB local_pcp:0kB free_cma:0kB lowmem_reserve[]: 0 0 3513 3513 Node 0 Normal free:2695476kB min:37008kB low:46260kB high:55512kB active_anon:303964kB inactive_anon:124kB active_file:24268kB inactive_file:50248kB unevictable:0kB writepending:1052kB present:4718592kB managed:3597444kB mlocked:0kB kernel_stack:4672kB pagetables:2804kB bounce:0kB free_pcp:1188kB local_pcp:708kB free_cma:0kB lowmem_reserve[]: 0 0 0 0 Node 0 DMA: 1*4kB (U) 0*8kB 0*16kB 1*32kB (U) 2*64kB (U) 1*128kB (U) 1*256kB (U) 0*512kB 1*1024kB (U) 1*2048kB (M) 3*4096kB (M) = 15908kB Node 0 DMA32: 3*4kB (M) 1*8kB (M) 2*16kB (M) 2*32kB (M) 4*64kB (M) 2*128kB (M) 2*256kB (M) 4*512kB (M) 1*1024kB (M) 2*2048kB (M) 720*4096kB (M) = 2957428kB Node 0 Normal: 1440*4kB (UM) 861*8kB (UM) 367*16kB (UM) 401*32kB (UM) 283*64kB (UM) 108*128kB (UME) 13*256kB (UME) 3*512kB (UM) 6*1024kB (UM) 10*2048kB (UME) 639*4096kB (UM) = 2712120kB Node 0 hugepages_total=0 hugepages_free=0 hugepages_surp=0 hugepages_size=2048kB 13452 total pagecache pages 0 pages in swap cache Swap cache stats: add 0, delete 0, find 0/0 Free swap = 0kB Total swap = 0kB 1965979 pages RAM 0 pages HighMem/MovableOnly 323102 pages reserved FAULT_INJECTION: forcing a failure. name failslab, interval 1, probability 0, space 0, times 0 CPU: 1 PID: 3006 Comm: syz-executor6 Not tainted 4.14.0-rc1+ #61 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:422 [inline] slab_alloc_node mm/slab.c:3304 [inline] kmem_cache_alloc_node_trace+0x5a/0x760 mm/slab.c:3668 kmalloc_node include/linux/slab.h:531 [inline] kzalloc_node include/linux/slab.h:677 [inline] __get_vm_area_node+0xae/0x340 mm/vmalloc.c:1402 __vmalloc_node_range+0xa3/0x730 mm/vmalloc.c:1760 __vmalloc_node mm/vmalloc.c:1810 [inline] __vmalloc+0x45/0x50 mm/vmalloc.c:1816 bpf_prog_alloc+0xa6/0x310 kernel/bpf/core.c:84 __get_filter+0xe0/0x220 net/core/filter.c:1275 sk_attach_filter+0x1d/0x80 net/core/filter.c:1310 sock_setsockopt+0xfde/0x1ae0 net/core/sock.c:926 SYSC_setsockopt net/socket.c:1848 [inline] SyS_setsockopt+0x2ff/0x360 net/socket.c:1831 entry_SYSCALL_64_fastpath+0x1f/0xbe RIP: 0033:0x4520a9 RSP: 002b:00007fddb1ac5c08 EFLAGS: 00000216 ORIG_RAX: 0000000000000036 RAX: ffffffffffffffda RBX: 0000000000718000 RCX: 00000000004520a9 RDX: 000000000000001a RSI: 0000000000000001 RDI: 0000000000000006 RBP: 00007fddb1ac5a10 R08: 0000000000000010 R09: 0000000000000000 R10: 0000000020912ff0 R11: 0000000000000216 R12: 00000000004b6c37 R13: 00007fddb1ac5b48 R14: 00000000004b6c47 R15: 0000000000000000 syz-executor6: vmalloc: allocation failure: 4096 bytes, mode:0x14080c0(GFP_KERNEL|__GFP_ZERO), nodemask=(null) syz-executor6 cpuset=/ mems_allowed=0 CPU: 1 PID: 3006 Comm: syz-executor6 Not tainted 4.14.0-rc1+ #61 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 warn_alloc+0x1c2/0x2f0 mm/page_alloc.c:3254 __vmalloc_node_range+0x599/0x730 mm/vmalloc.c:1781 __vmalloc_node mm/vmalloc.c:1810 [inline] __vmalloc+0x45/0x50 mm/vmalloc.c:1816 bpf_prog_alloc+0xa6/0x310 kernel/bpf/core.c:84 __get_filter+0xe0/0x220 net/core/filter.c:1275 sk_attach_filter+0x1d/0x80 net/core/filter.c:1310 sock_setsockopt+0xfde/0x1ae0 net/core/sock.c:926 SYSC_setsockopt net/socket.c:1848 [inline] SyS_setsockopt+0x2ff/0x360 net/socket.c:1831 entry_SYSCALL_64_fastpath+0x1f/0xbe RIP: 0033:0x4520a9 RSP: 002b:00007fddb1ac5c08 EFLAGS: 00000216 ORIG_RAX: 0000000000000036 RAX: ffffffffffffffda RBX: 0000000000718000 RCX: 00000000004520a9 RDX: 000000000000001a RSI: 0000000000000001 RDI: 0000000000000006 RBP: 00007fddb1ac5a10 R08: 0000000000000010 R09: 0000000000000000 R10: 0000000020912ff0 R11: 0000000000000216 R12: 00000000004b6c37 R13: 00007fddb1ac5b48 R14: 00000000004b6c47 R15: 0000000000000000 Mem-Info: active_anon:74497 inactive_anon:31 isolated_anon:0 active_file:6067 inactive_file:7353 isolated_file:0 unevictable:0 dirty:269 writeback:0 unstable:0 slab_reclaimable:7594 slab_unreclaimable:93692 mapped:22403 shmem:38 pagetables:762 bounce:0 free:1417806 free_pcp:400 free_cma:0 Node 0 active_anon:291660kB inactive_anon:124kB active_file:24268kB inactive_file:29424kB unevictable:0kB isolated(anon):0kB isolated(file):0kB mapped:89612kB dirty:1088kB writeback:0kB shmem:152kB shmem_thp: 0kB shmem_pmdmapped: 0kB anon_thp: 32768kB writeback_tmp:0kB unstable:0kB all_unreclaimable? no FAULT_INJECTION: forcing a failure. name failslab, interval 1, probability 0, space 0, times 0 CPU: 0 PID: 3073 Comm: syz-executor2 Not tainted 4.14.0-rc1+ #61 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:422 [inline] slab_alloc_node mm/slab.c:3304 [inline] kmem_cache_alloc_node+0x56/0x760 mm/slab.c:3649 __alloc_skb+0xf1/0x740 net/core/skbuff.c:194 alloc_skb_fclone include/linux/skbuff.h:1019 [inline] sk_stream_alloc_skb+0x10d/0x860 net/ipv4/tcp.c:855 tcp_sendmsg_locked+0xff5/0x3bd0 net/ipv4/tcp.c:1283 tcp_sendmsg+0x2f/0x50 net/ipv4/tcp.c:1445 inet_sendmsg+0x11f/0x5e0 net/ipv4/af_inet.c:762 sock_sendmsg_nosec net/socket.c:633 [inline] sock_sendmsg+0xca/0x110 net/socket.c:643 SYSC_sendto+0x358/0x5a0 net/socket.c:1750 SyS_sendto+0x40/0x50 net/socket.c:1718 entry_SYSCALL_64_fastpath+0x1f/0xbe RIP: 0033:0x4520a9 RSP: 002b:00007f53fc605c08 EFLAGS: 00000216 ORIG_RAX: 000000000000002c RAX: ffffffffffffffda RBX: 0000000000718000 RCX: 00000000004520a9 RDX: 0000000000000001 RSI: 00000000208d8000 RDI: 0000000000000005 RBP: 00007f53fc605a10 R08: 0000000020f10000 R09: 0000000000000010 R10: 0000000000000000 R11: 0000000000000216 R12: 00000000004b6c37 R13: 00007f53fc605b48 R14: 00000000004b6c47 R15: 0000000000000000 Node 0 DMA free:15908kB min:160kB low:200kB high:240kB active_anon:0kB inactive_anon:0kB active_file:0kB inactive_file:0kB unevictable:0kB writepending:0kB present:15992kB managed:15908kB mlocked:0kB kernel_stack:0kB pagetables:0kB bounce:0kB free_pcp:0kB local_pcp:0kB free_cma:0kB lowmem_reserve[]: 0 2886 6399 6399 Node 0 DMA32 free:2957428kB min:30408kB low:38008kB high:45608kB active_anon:0kB inactive_anon:0kB active_file:0kB inactive_file:0kB unevictable:0kB writepending:0kB present:3129332kB managed:2958156kB mlocked:0kB kernel_stack:0kB pagetables:0kB bounce:0kB free_pcp:728kB local_pcp:0kB free_cma:0kB lowmem_reserve[]: 0 0 3513 3513 Node 0 Normal free:2713112kB min:37008kB low:46260kB high:55512kB active_anon:285204kB inactive_anon:124kB active_file:24268kB inactive_file:50308kB unevictable:0kB writepending:1112kB present:4718592kB managed:3597444kB mlocked:0kB kernel_stack:4288kB pagetables:2576kB bounce:0kB free_pcp:1016kB local_pcp:356kB free_cma:0kB lowmem_reserve[]: 0 0 0 0 Node 0 DMA: 1*4kB (U) 0*8kB 0*16kB 1*32kB (U) 2*64kB (U) 1*128kB (U) 1*256kB (U) 0*512kB 1*1024kB (U) 1*2048kB (M) 3*4096kB (M) = 15908kB Node 0 DMA32: 3*4kB (M) 1*8kB (M) 2*16kB (M) 2*32kB (M) 4*64kB (M) 2*128kB (M) 2*256kB (M) 4*512kB (M) 1*1024kB (M) 2*2048kB (M) 720*4096kB (M) = 2957428kB Node 0 Normal: 1452*4kB (UME) 1043*8kB (UME) 351*16kB (UME) 311*32kB (UME) 286*64kB (UM) 109*128kB (UM) 12*256kB (UME) 4*512kB (UM) 6*1024kB (UM) 7*2048kB (UME) 641*4096kB (UM) = 2713112kB Node 0 hugepages_total=0 hugepages_free=0 hugepages_surp=0 hugepages_size=2048kB 13466 total pagecache pages 0 pages in swap cache Swap cache stats: add 0, delete 0, find 0/0 Free swap = 0kB Total swap = 0kB 1965979 pages RAM 0 pages HighMem/MovableOnly 323102 pages reserved FAULT_INJECTION: forcing a failure. name failslab, interval 1, probability 0, space 0, times 0 CPU: 0 PID: 3096 Comm: syz-executor2 Not tainted 4.14.0-rc1+ #61 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:422 [inline] slab_alloc_node mm/slab.c:3304 [inline] kmem_cache_alloc_node_trace+0x5a/0x760 mm/slab.c:3668 __do_kmalloc_node mm/slab.c:3688 [inline] __kmalloc_node_track_caller+0x33/0x70 mm/slab.c:3703 __kmalloc_reserve.isra.40+0x41/0xd0 net/core/skbuff.c:138 __alloc_skb+0x13b/0x740 net/core/skbuff.c:206 alloc_skb_fclone include/linux/skbuff.h:1019 [inline] sk_stream_alloc_skb+0x10d/0x860 net/ipv4/tcp.c:855 tcp_sendmsg_locked+0xff5/0x3bd0 net/ipv4/tcp.c:1283 tcp_sendmsg+0x2f/0x50 net/ipv4/tcp.c:1445 inet_sendmsg+0x11f/0x5e0 net/ipv4/af_inet.c:762 sock_sendmsg_nosec net/socket.c:633 [inline] sock_sendmsg+0xca/0x110 net/socket.c:643 SYSC_sendto+0x358/0x5a0 net/socket.c:1750 SyS_sendto+0x40/0x50 net/socket.c:1718 entry_SYSCALL_64_fastpath+0x1f/0xbe RIP: 0033:0x4520a9 RSP: 002b:00007f53fc605c08 EFLAGS: 00000216 ORIG_RAX: 000000000000002c RAX: ffffffffffffffda RBX: 0000000000718000 RCX: 00000000004520a9 RDX: 0000000000000001 RSI: 00000000208d8000 RDI: 0000000000000005 RBP: 00007f53fc605a10 R08: 0000000020f10000 R09: 0000000000000010 R10: 0000000000000000 R11: 0000000000000216 R12: 00000000004b6c37 R13: 00007f53fc605b48 R14: 00000000004b6c47 R15: 0000000000000000 device lo left promiscuous mode nla_parse: 53 callbacks suppressed netlink: 1 bytes leftover after parsing attributes in process `syz-executor5'. netlink: 1 bytes leftover after parsing attributes in process `syz-executor5'. device lo left promiscuous mode sctp: [Deprecated]: syz-executor1 (pid 3951) Use of struct sctp_assoc_value in delayed_ack socket option. Use struct sctp_sack_info instead sctp: [Deprecated]: syz-executor1 (pid 3971) Use of struct sctp_assoc_value in delayed_ack socket option. Use struct sctp_sack_info instead sctp: [Deprecated]: syz-executor0 (pid 4242) Use of struct sctp_assoc_value in delayed_ack socket option. Use struct sctp_sack_info instead sctp: [Deprecated]: syz-executor0 (pid 4242) Use of struct sctp_assoc_value in delayed_ack socket option. Use struct sctp_sack_info instead IPv6: ADDRCONF(NETDEV_CHANGE): syz2: link becomes ready