bisecting fixing commit since a03957ab0fd5d7d03b512a72ab9106a1749f556e building syzkaller on 1bfa09b9672821334a7ed926244ebc39910b84f4 testing commit a03957ab0fd5d7d03b512a72ab9106a1749f556e with gcc (GCC) 8.1.0 kernel signature: fdb2577af60c343d0ec4a98e2d1b79c9da1c912d1186c516010536377eb8a676 run #0: crashed: general protection fault in corrupted run #1: crashed: general protection fault in corrupted run #2: crashed: general protection fault in flex_array_get run #3: crashed: general protection fault in flex_array_get run #4: crashed: general protection fault in corrupted run #5: crashed: general protection fault in flex_array_get run #6: crashed: general protection fault in flex_array_get run #7: crashed: general protection fault in flex_array_get run #8: crashed: general protection fault in flex_array_get run #9: crashed: general protection fault in flex_array_get testing current HEAD c14d30dc9987047b439b03d6e6db7d54d9f7f180 testing commit c14d30dc9987047b439b03d6e6db7d54d9f7f180 with gcc (GCC) 8.1.0 kernel signature: 0411c351f29df967792eefa8deac3b40364427055150a2fad24364c01c12628d run #0: crashed: general protection fault in corrupted run #1: crashed: general protection fault in flex_array_get run #2: crashed: general protection fault in flex_array_get run #3: crashed: general protection fault in flex_array_get run #4: crashed: general protection fault in flex_array_get run #5: crashed: general protection fault in flex_array_get run #6: crashed: general protection fault in flex_array_get run #7: crashed: general protection fault in flex_array_get run #8: crashed: general protection fault in flex_array_get run #9: crashed: general protection fault in flex_array_get revisions tested: 2, total time: 26m54.059960406s (build: 18m16.386825002s, test: 7m5.903712796s) the crash still happens on HEAD commit msg: Linux 4.19.139 crash: general protection fault in flex_array_get kasan: GPF could be caused by NULL-ptr deref or user memory access sock_sendmsg_nosec net/socket.c:622 [inline] sock_sendmsg+0xb7/0xf0 net/socket.c:632 ___sys_sendmsg+0x649/0x950 net/socket.c:2115 general protection fault: 0000 [#1] PREEMPT SMP KASAN CPU: 1 PID: 7274 Comm: syz-executor.2 Not tainted 4.19.139-syzkaller #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 RIP: 0010:flex_array_get+0x23/0x240 lib/flex_array.c:320 Code: 90 90 90 90 90 90 90 48 b8 00 00 00 00 00 fc ff df 55 48 89 fa 48 89 e5 48 c1 ea 03 41 56 41 55 41 54 53 48 89 fb 48 83 ec 10 <0f> b6 04 02 84 c0 74 08 3c 03 0f 8e 8d 01 00 00 44 8b 33 45 85 f6 __sys_sendmsg+0xd9/0x180 net/socket.c:2153 RSP: 0018:ffff888085b575a8 EFLAGS: 00010282 RAX: dffffc0000000000 RBX: 0000000000000000 RCX: 1ffff11011eb2ad6 RDX: 0000000000000000 RSI: 0000000000000000 RDI: 0000000000000000 RBP: ffff888085b575d8 R08: ffff888085b57908 R09: ffffed1015d64732 R10: ffffed1015d64732 R11: ffff8880aeb23993 R12: ffff888084d26980 R13: ffff888075281584 R14: ffff8880a4701d00 R15: 1ffff110109a4e19 __do_sys_sendmsg net/socket.c:2162 [inline] __se_sys_sendmsg net/socket.c:2160 [inline] __x64_sys_sendmsg+0x73/0xb0 net/socket.c:2160 FS: 00007f26d482b700(0000) GS:ffff8880aeb00000(0000) knlGS:0000000000000000 do_syscall_64+0xd6/0x4e0 arch/x86/entry/common.c:293 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 entry_SYSCALL_64_after_hwframe+0x49/0xbe CR2: 00007f56ff7b5020 CR3: 000000009527f000 CR4: 00000000001406e0 RIP: 0033:0x458e29 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 Code: 2d b8 fb ff c3 66 2e 0f 1f 84 00 00 00 00 00 66 90 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 b7 fb ff c3 66 2e 0f 1f 84 00 00 00 00 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 RSP: 002b:00007f22c9914c78 EFLAGS: 00000246 ORIG_RAX: 000000000000002e Call Trace: RAX: ffffffffffffffda RBX: 00007f22c9914c90 RCX: 0000000000458e29 RDX: 0000000000000000 RSI: 0000000020000000 RDI: 0000000000000003 sctp_stream_out include/net/sctp/structs.h:1474 [inline] sctp_sched_dequeue_done+0x1d8/0x300 net/sctp/stream_sched.c:255 RBP: 000000000073bf00 R08: 0000000000000000 R09: 0000000000000000 __sctp_outq_teardown+0x660/0xc30 net/sctp/outqueue.c:267 R10: 0000000000000000 R11: 0000000000000246 R12: 00007f22c99156d4 R13: 00000000004c6075 R14: 00000000004da858 R15: 0000000000000005 sctp_outq_free+0x9/0x10 net/sctp/outqueue.c:291 FAULT_INJECTION: forcing a failure. name failslab, interval 1, probability 0, space 0, times 0 sctp_association_free+0x1d5/0x711 net/sctp/associola.c:361 sctp_cmd_delete_tcb net/sctp/sm_sideeffect.c:944 [inline] sctp_cmd_interpreter net/sctp/sm_sideeffect.c:1332 [inline] sctp_side_effects net/sctp/sm_sideeffect.c:1199 [inline] sctp_do_sm+0x989/0x4e50 net/sctp/sm_sideeffect.c:1170 CPU: 0 PID: 7285 Comm: syz-executor.3 Not tainted 4.19.139-syzkaller #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 Call Trace: __dump_stack lib/dump_stack.c:77 [inline] dump_stack+0x123/0x177 lib/dump_stack.c:118 fail_dump lib/fault-inject.c:51 [inline] should_fail.cold.4+0x5/0x13 lib/fault-inject.c:149 __should_failslab+0xba/0xf0 mm/failslab.c:32 sctp_primitive_SHUTDOWN+0x7c/0xc0 net/sctp/primitive.c:104 should_failslab+0x9/0x14 mm/slab_common.c:1588 sctp_close+0x354/0x750 net/sctp/socket.c:1560 slab_pre_alloc_hook mm/slab.h:424 [inline] slab_alloc mm/slab.c:3383 [inline] kmem_cache_alloc+0x47/0x730 mm/slab.c:3557 kmem_cache_zalloc include/linux/slab.h:699 [inline] fill_pool lib/debugobjects.c:134 [inline] __debug_object_init+0x7dc/0xd70 lib/debugobjects.c:379 inet_release+0xb9/0x1b0 net/ipv4/af_inet.c:427 __sock_release+0xc7/0x2a0 net/socket.c:579 sock_close+0x10/0x20 net/socket.c:1140 __fput+0x24c/0x7f0 fs/file_table.c:278 ____fput+0x9/0x10 fs/file_table.c:309 task_work_run+0x10e/0x190 kernel/task_work.c:113 debug_object_init+0x16/0x20 lib/debugobjects.c:431 get_signal+0x13ba/0x1a30 kernel/signal.c:2399 __init_work+0x1b/0x20 kernel/workqueue.c:504 do_signal+0x87/0x1960 arch/x86/kernel/signal.c:821 sctp_inq_set_th_handler+0x1d/0xe8 net/sctp/inqueue.c:251 sctp_association_init net/sctp/associola.c:241 [inline] sctp_association_new+0x10db/0x1ef0 net/sctp/associola.c:317 sctp_make_temp_asoc+0x8b/0x1a0 net/sctp/sm_make_chunk.c:1606 sctp_sf_do_unexpected_init.isra.37+0x66c/0x1400 net/sctp/sm_statefuns.c:1554 sctp_sf_do_5_2_1_siminit+0xf/0x20 net/sctp/sm_statefuns.c:1695 sctp_do_sm+0x112/0x4e50 net/sctp/sm_sideeffect.c:1167 exit_to_usermode_loop+0x114/0x200 arch/x86/entry/common.c:163 prepare_exit_to_usermode arch/x86/entry/common.c:198 [inline] syscall_return_slowpath arch/x86/entry/common.c:271 [inline] do_syscall_64+0x419/0x4e0 arch/x86/entry/common.c:296 entry_SYSCALL_64_after_hwframe+0x49/0xbe RIP: 0033:0x458e29 Code: 2d b8 fb ff c3 66 2e 0f 1f 84 00 00 00 00 00 66 90 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 b7 fb ff c3 66 2e 0f 1f 84 00 00 00 00 RSP: 002b:00007f26d482ac78 EFLAGS: 00000246 ORIG_RAX: 000000000000002e RAX: 000000000001fff8 RBX: 00007f26d482ac90 RCX: 0000000000458e29 RDX: 0000000000000000 RSI: 0000000020000000 RDI: 0000000000000003 RBP: 000000000073bf00 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 00007f26d482b6d4 R13: 00000000004c6075 R14: 00000000004da858 R15: 0000000000000005 Modules linked in: sctp_assoc_bh_rcv+0x27f/0x5c0 net/sctp/associola.c:1073 sctp_inq_push+0x1aa/0x240 net/sctp/inqueue.c:95 sctp_backlog_rcv+0x1ac/0x1280 net/sctp/input.c:356 sk_backlog_rcv include/net/sock.h:946 [inline] __release_sock+0x10c/0x360 net/core/sock.c:2344 release_sock+0x4f/0x180 net/core/sock.c:2860 sctp_wait_for_connect+0x22c/0x4c0 net/sctp/socket.c:8638 sctp_sendmsg_to_asoc+0x169a/0x1e10 net/sctp/socket.c:1989 sctp_sendmsg+0xd3f/0x1680 net/sctp/socket.c:2135 inet_sendmsg+0x10d/0x450 net/ipv4/af_inet.c:798 sock_sendmsg_nosec net/socket.c:622 [inline] sock_sendmsg+0xb7/0xf0 net/socket.c:632 ___sys_sendmsg+0x649/0x950 net/socket.c:2115 __sys_sendmsg+0xd9/0x180 net/socket.c:2153 __do_sys_sendmsg net/socket.c:2162 [inline] __se_sys_sendmsg net/socket.c:2160 [inline] __x64_sys_sendmsg+0x73/0xb0 net/socket.c:2160 do_syscall_64+0xd6/0x4e0 arch/x86/entry/common.c:293 entry_SYSCALL_64_after_hwframe+0x49/0xbe RIP: 0033:0x458e29 Code: 2d b8 fb ff c3 66 2e 0f 1f 84 00 00 00 00 00 66 90 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 b7 fb ff c3 66 2e 0f 1f 84 00 00 00 00 RSP: 002b:00007fc8f8110c78 EFLAGS: 00000246 ORIG_RAX: 000000000000002e RAX: ffffffffffffffda RBX: 00007fc8f8110c90 RCX: 0000000000458e29 RDX: 0000000000000000 RSI: 0000000020000000 RDI: 0000000000000003 RBP: 000000000073bf00 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 00007fc8f81116d4 R13: 00000000004c6075 R14: 00000000004da858 R15: 0000000000000005 CPU: 1 PID: 7276 Comm: syz-executor.1 Tainted: G D 4.19.139-syzkaller #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 FAULT_INJECTION: forcing a failure. name failslab, interval 1, probability 0, space 0, times 0 Call Trace: __dump_stack lib/dump_stack.c:77 [inline] dump_stack+0x123/0x177 lib/dump_stack.c:118 fail_dump lib/fault-inject.c:51 [inline] should_fail.cold.4+0x5/0x13 lib/fault-inject.c:149 __should_failslab+0xba/0xf0 mm/failslab.c:32 should_failslab+0x9/0x14 mm/slab_common.c:1588 slab_pre_alloc_hook mm/slab.h:424 [inline] slab_alloc_node mm/slab.c:3304 [inline] kmem_cache_alloc_node+0x56/0x730 mm/slab.c:3647 __alloc_skb+0xa7/0x580 net/core/skbuff.c:193 alloc_skb include/linux/skbuff.h:995 [inline] _sctp_make_chunk+0x3f/0x260 net/sctp/sm_make_chunk.c:1411 sctp_make_control net/sctp/sm_make_chunk.c:1458 [inline] sctp_make_cookie_echo+0x85/0x160 net/sctp/sm_make_chunk.c:591 sctp_cmd_interpreter net/sctp/sm_sideeffect.c:1397 [inline] sctp_side_effects net/sctp/sm_sideeffect.c:1199 [inline] sctp_do_sm+0x2929/0x4e50 net/sctp/sm_sideeffect.c:1170 sctp_assoc_bh_rcv+0x27f/0x5c0 net/sctp/associola.c:1073 sctp_inq_push+0x1aa/0x240 net/sctp/inqueue.c:95 sctp_backlog_rcv+0x1ac/0x1280 net/sctp/input.c:356 sk_backlog_rcv include/net/sock.h:946 [inline] __release_sock+0x10c/0x360 net/core/sock.c:2344 release_sock+0x4f/0x180 net/core/sock.c:2860 sctp_wait_for_connect+0x22c/0x4c0 net/sctp/socket.c:8638 sctp_sendmsg_to_asoc+0x169a/0x1e10 net/sctp/socket.c:1989 sctp_sendmsg+0xd3f/0x1680 net/sctp/socket.c:2135 inet_sendmsg+0x10d/0x450 net/ipv4/af_inet.c:798 sock_sendmsg_nosec net/socket.c:622 [inline] sock_sendmsg+0xb7/0xf0 net/socket.c:632 ___sys_sendmsg+0x649/0x950 net/socket.c:2115 __sys_sendmsg+0xd9/0x180 net/socket.c:2153 __do_sys_sendmsg net/socket.c:2162 [inline] __se_sys_sendmsg net/socket.c:2160 [inline] __x64_sys_sendmsg+0x73/0xb0 net/socket.c:2160 do_syscall_64+0xd6/0x4e0 arch/x86/entry/common.c:293 entry_SYSCALL_64_after_hwframe+0x49/0xbe RIP: 0033:0x458e29 Code: 2d b8 fb ff c3 66 2e 0f 1f 84 00 00 00 00 00 66 90 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 b7 fb ff c3 66 2e 0f 1f 84 00 00 00 00 RSP: 002b:00007fc9a0652c78 EFLAGS: 00000246 ORIG_RAX: 000000000000002e RAX: ffffffffffffffda RBX: 00007fc9a0652c90 RCX: 0000000000458e29 RDX: 0000000000000000 RSI: 0000000020000000 RDI: 0000000000000003 RBP: 000000000073bf00 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 00007fc9a06536d4 R13: 00000000004c6075 R14: 00000000004da858 R15: 0000000000000005 CPU: 0 PID: 7290 Comm: syz-executor.5 Tainted: G D 4.19.139-syzkaller #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 Call Trace: __dump_stack lib/dump_stack.c:77 [inline] dump_stack+0x123/0x177 lib/dump_stack.c:118 fail_dump lib/fault-inject.c:51 [inline] should_fail.cold.4+0x5/0x13 lib/fault-inject.c:149 __should_failslab+0xba/0xf0 mm/failslab.c:32 should_failslab+0x9/0x14 mm/slab_common.c:1588 slab_pre_alloc_hook mm/slab.h:424 [inline] slab_alloc_node mm/slab.c:3304 [inline] kmem_cache_alloc_node+0x56/0x730 mm/slab.c:3647 __alloc_skb+0xa7/0x580 net/core/skbuff.c:193 FAULT_INJECTION: forcing a failure. name failslab, interval 1, probability 0, space 0, times 0 alloc_skb include/linux/skbuff.h:995 [inline] _sctp_make_chunk+0x3f/0x260 net/sctp/sm_make_chunk.c:1411 sctp_make_control net/sctp/sm_make_chunk.c:1458 [inline] sctp_make_cookie_echo+0x85/0x160 net/sctp/sm_make_chunk.c:591 sctp_cmd_interpreter net/sctp/sm_sideeffect.c:1397 [inline] sctp_side_effects net/sctp/sm_sideeffect.c:1199 [inline] sctp_do_sm+0x2929/0x4e50 net/sctp/sm_sideeffect.c:1170 sctp_assoc_bh_rcv+0x27f/0x5c0 net/sctp/associola.c:1073 sctp_inq_push+0x1aa/0x240 net/sctp/inqueue.c:95 sctp_backlog_rcv+0x1ac/0x1280 net/sctp/input.c:356 sk_backlog_rcv include/net/sock.h:946 [inline] __release_sock+0x10c/0x360 net/core/sock.c:2344 release_sock+0x4f/0x180 net/core/sock.c:2860 sctp_wait_for_connect+0x22c/0x4c0 net/sctp/socket.c:8638 sctp_sendmsg_to_asoc+0x169a/0x1e10 net/sctp/socket.c:1989 sctp_sendmsg+0xd3f/0x1680 net/sctp/socket.c:2135 inet_sendmsg+0x10d/0x450 net/ipv4/af_inet.c:798 sock_sendmsg_nosec net/socket.c:622 [inline] sock_sendmsg+0xb7/0xf0 net/socket.c:632 ___sys_sendmsg+0x649/0x950 net/socket.c:2115 __sys_sendmsg+0xd9/0x180 net/socket.c:2153 ---[ end trace a4b85d3eba991dbe ]--- RIP: 0010:flex_array_get+0x23/0x240 lib/flex_array.c:320 __do_sys_sendmsg net/socket.c:2162 [inline] __se_sys_sendmsg net/socket.c:2160 [inline] __x64_sys_sendmsg+0x73/0xb0 net/socket.c:2160 do_syscall_64+0xd6/0x4e0 arch/x86/entry/common.c:293 entry_SYSCALL_64_after_hwframe+0x49/0xbe RIP: 0033:0x458e29 Code: 90 90 90 90 90 90 90 48 b8 00 00 00 00 00 fc ff df 55 48 89 fa 48 89 e5 48 c1 ea 03 41 56 41 55 41 54 53 48 89 fb 48 83 ec 10 <0f> b6 04 02 84 c0 74 08 3c 03 0f 8e 8d 01 00 00 44 8b 33 45 85 f6 Code: 2d b8 fb ff c3 66 2e 0f 1f 84 00 00 00 00 00 66 90 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 b7 fb ff c3 66 2e 0f 1f 84 00 00 00 00 RSP: 002b:00007f22c9914c78 EFLAGS: 00000246 ORIG_RAX: 000000000000002e RAX: ffffffffffffffda RBX: 00007f22c9914c90 RCX: 0000000000458e29 RDX: 0000000000000000 RSI: 0000000020000000 RDI: 0000000000000003 RBP: 000000000073bf00 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 00007f22c99156d4 R13: 00000000004c6075 R14: 00000000004da858 R15: 0000000000000005 FAULT_INJECTION: forcing a failure. name failslab, interval 1, probability 0, space 0, times 0 CPU: 1 PID: 7295 Comm: syz-executor.4 Tainted: G D 4.19.139-syzkaller #0 FAULT_INJECTION: forcing a failure. name failslab, interval 1, probability 0, space 0, times 0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 Call Trace: __dump_stack lib/dump_stack.c:77 [inline] dump_stack+0x123/0x177 lib/dump_stack.c:118 fail_dump lib/fault-inject.c:51 [inline] should_fail.cold.4+0x5/0x13 lib/fault-inject.c:149 __should_failslab+0xba/0xf0 mm/failslab.c:32 should_failslab+0x9/0x14 mm/slab_common.c:1588 slab_pre_alloc_hook mm/slab.h:424 [inline] slab_alloc mm/slab.c:3383 [inline] kmem_cache_alloc+0x47/0x730 mm/slab.c:3557 kmem_cache_zalloc include/linux/slab.h:699 [inline] fill_pool lib/debugobjects.c:134 [inline] __debug_object_init+0x7dc/0xd70 lib/debugobjects.c:379 debug_object_init+0x16/0x20 lib/debugobjects.c:431 debug_timer_init kernel/time/timer.c:713 [inline] debug_init kernel/time/timer.c:766 [inline] init_timer_key+0x2e/0x270 kernel/time/timer.c:815 sctp_association_init net/sctp/associola.c:153 [inline] sctp_association_new+0x9fd/0x1ef0 net/sctp/associola.c:317 sctp_make_temp_asoc+0x8b/0x1a0 net/sctp/sm_make_chunk.c:1606 sctp_sf_do_unexpected_init.isra.37+0x66c/0x1400 net/sctp/sm_statefuns.c:1554 sctp_sf_do_5_2_1_siminit+0xf/0x20 net/sctp/sm_statefuns.c:1695 sctp_do_sm+0x112/0x4e50 net/sctp/sm_sideeffect.c:1167 sctp_assoc_bh_rcv+0x27f/0x5c0 net/sctp/associola.c:1073 sctp_inq_push+0x1aa/0x240 net/sctp/inqueue.c:95 sctp_backlog_rcv+0x1ac/0x1280 net/sctp/input.c:356 sk_backlog_rcv include/net/sock.h:946 [inline] __release_sock+0x10c/0x360 net/core/sock.c:2344 release_sock+0x4f/0x180 net/core/sock.c:2860 sctp_wait_for_connect+0x22c/0x4c0 net/sctp/socket.c:8638 sctp_sendmsg_to_asoc+0x169a/0x1e10 net/sctp/socket.c:1989 sctp_sendmsg+0xd3f/0x1680 net/sctp/socket.c:2135 inet_sendmsg+0x10d/0x450 net/ipv4/af_inet.c:798 sock_sendmsg_nosec net/socket.c:622 [inline] sock_sendmsg+0xb7/0xf0 net/socket.c:632 ___sys_sendmsg+0x649/0x950 net/socket.c:2115 __sys_sendmsg+0xd9/0x180 net/socket.c:2153 __do_sys_sendmsg net/socket.c:2162 [inline] __se_sys_sendmsg net/socket.c:2160 [inline] __x64_sys_sendmsg+0x73/0xb0 net/socket.c:2160 do_syscall_64+0xd6/0x4e0 arch/x86/entry/common.c:293 entry_SYSCALL_64_after_hwframe+0x49/0xbe RIP: 0033:0x458e29 Code: 2d b8 fb ff c3 66 2e 0f 1f 84 00 00 00 00 00 66 90 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 b7 fb ff c3 66 2e 0f 1f 84 00 00 00 00 RSP: 002b:00007f245686ec78 EFLAGS: 00000246 ORIG_RAX: 000000000000002e RAX: ffffffffffffffda RBX: 00007f245686ec90 RCX: 0000000000458e29 RDX: 0000000000000000 RSI: 0000000020000000 RDI: 0000000000000003 RBP: 000000000073bf00 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 00007f245686f6d4 R13: 00000000004c6075 R14: 00000000004da858 R15: 0000000000000005 CPU: 0 PID: 7298 Comm: syz-executor.0 Tainted: G D 4.19.139-syzkaller #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 Call Trace: RSP: 0018:ffff888085b575a8 EFLAGS: 00010282 __dump_stack lib/dump_stack.c:77 [inline] dump_stack+0x123/0x177 lib/dump_stack.c:118 fail_dump lib/fault-inject.c:51 [inline] should_fail.cold.4+0x5/0x13 lib/fault-inject.c:149 RAX: dffffc0000000000 RBX: 0000000000000000 RCX: 1ffff11011eb2ad6 __should_failslab+0xba/0xf0 mm/failslab.c:32 should_failslab+0x9/0x14 mm/slab_common.c:1588 slab_pre_alloc_hook mm/slab.h:424 [inline] slab_alloc_node mm/slab.c:3304 [inline] kmem_cache_alloc_node+0x56/0x730 mm/slab.c:3647 RDX: 0000000000000000 RSI: 0000000000000000 RDI: 0000000000000000 __alloc_skb+0xa7/0x580 net/core/skbuff.c:193 RBP: ffff888085b575d8 R08: ffff888085b57908 R09: ffffed1015d64732 alloc_skb include/linux/skbuff.h:995 [inline] _sctp_make_chunk+0x3f/0x260 net/sctp/sm_make_chunk.c:1411 R10: ffffed1015d64732 R11: ffff8880aeb23993 R12: ffff888084d26980 sctp_make_control net/sctp/sm_make_chunk.c:1458 [inline] sctp_make_cookie_echo+0x85/0x160 net/sctp/sm_make_chunk.c:591 sctp_cmd_interpreter net/sctp/sm_sideeffect.c:1397 [inline] sctp_side_effects net/sctp/sm_sideeffect.c:1199 [inline] sctp_do_sm+0x2929/0x4e50 net/sctp/sm_sideeffect.c:1170 R13: ffff888075281584 R14: ffff8880a4701d00 R15: 1ffff110109a4e19 FS: 00007f26d482b700(0000) GS:ffff8880aeb00000(0000) knlGS:0000000000000000 sctp_assoc_bh_rcv+0x27f/0x5c0 net/sctp/associola.c:1073 sctp_inq_push+0x1aa/0x240 net/sctp/inqueue.c:95 sctp_backlog_rcv+0x1ac/0x1280 net/sctp/input.c:356 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 0000556f8611d528 CR3: 000000009527f000 CR4: 00000000001406e0 sk_backlog_rcv include/net/sock.h:946 [inline] __release_sock+0x10c/0x360 net/core/sock.c:2344 release_sock+0x4f/0x180 net/core/sock.c:2860 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 sctp_wait_for_connect+0x22c/0x4c0 net/sctp/socket.c:8638 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 sctp_sendmsg_to_asoc+0x169a/0x1e10 net/sctp/socket.c:1989