===================================================== BUG: KMSAN: uninit-value in crc32_body lib/crc32.c:112 [inline] BUG: KMSAN: uninit-value in crc32_le_generic lib/crc32.c:179 [inline] BUG: KMSAN: uninit-value in __crc32c_le_base+0x4fa/0xd30 lib/crc32.c:202 CPU: 0 PID: 12173 Comm: syz-fuzzer Not tainted 5.5.0-rc1-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+0x1c9/0x220 lib/dump_stack.c:118 kmsan_report+0xf8/0x1e0 mm/kmsan/kmsan_report.c:118 __msan_warning+0x58/0xa0 mm/kmsan/kmsan_instr.c:215 crc32_body lib/crc32.c:112 [inline] crc32_le_generic lib/crc32.c:179 [inline] __crc32c_le_base+0x4fa/0xd30 lib/crc32.c:202 chksum_update+0xb2/0x110 crypto/crc32c_generic.c:90 crypto_shash_update+0x4ed/0x550 crypto/shash.c:107 crc32c+0x150/0x220 lib/libcrc32c.c:47 sctp_csum_update+0x89/0xa0 include/net/sctp/checksum.h:36 __skb_checksum+0x12f7/0x1300 net/core/skbuff.c:2640 sctp_compute_cksum include/net/sctp/checksum.h:59 [inline] sctp_packet_pack net/sctp/output.c:528 [inline] sctp_packet_transmit+0x422d/0x4380 net/sctp/output.c:597 sctp_outq_flush_transports net/sctp/outqueue.c:1146 [inline] sctp_outq_flush+0x1823/0x5d80 net/sctp/outqueue.c:1194 sctp_outq_uncork+0xd0/0xf0 net/sctp/outqueue.c:757 sctp_cmd_interpreter net/sctp/sm_sideeffect.c:1786 [inline] sctp_side_effects net/sctp/sm_sideeffect.c:1189 [inline] sctp_do_sm+0x9105/0x9760 net/sctp/sm_sideeffect.c:1160 sctp_generate_heartbeat_event+0x3c6/0x5a0 net/sctp/sm_sideeffect.c:391 call_timer_fn+0x232/0x530 kernel/time/timer.c:1404 expire_timers kernel/time/timer.c:1449 [inline] __run_timers+0xd60/0x1270 kernel/time/timer.c:1773 run_timer_softirq+0x2d/0x50 kernel/time/timer.c:1786 __do_softirq+0x4a1/0x83a kernel/softirq.c:293 invoke_softirq kernel/softirq.c:375 [inline] irq_exit+0x230/0x280 kernel/softirq.c:416 exiting_irq+0xe/0x10 arch/x86/include/asm/apic.h:536 smp_apic_timer_interrupt+0x48/0x70 arch/x86/kernel/apic/apic.c:1140 apic_timer_interrupt+0x2e/0x40 arch/x86/entry/entry_64.S:834 RIP: 0010:kmsan_slab_alloc+0xb5/0xe0 mm/kmsan/kmsan_hooks.c:85 Code: eb 0a ba 01 00 00 00 e8 c9 ec ff ff be ff ff ff ff 65 0f c1 35 5c c9 17 6e ff ce 75 1c e8 53 94 32 ff 4c 89 65 d8 ff 75 d8 9d <48> 83 c4 10 5b 41 5c 41 5e 41 5f 5d c3 0f 0b 48 c7 c7 af 16 27 9f RSP: 0018:ffffa6278288f538 EFLAGS: 00000246 ORIG_RAX: ffffffffffffff13 RAX: c8d859cfe0aa8700 RBX: ffff9366b2714400 RCX: 0000000000000101 RDX: 0000000000000100 RSI: 0000000000000000 RDI: ffff9366b2714400 RBP: ffffa6278288f568 R08: ffffe1360000000f R09: ffff93676fffb000 R10: 0000000000000010 R11: ffffffff91663cc0 R12: 0000000000000246 R13: ffffffffffffffff R14: 0000000000082cc0 R15: ffff93676f806c40 slab_alloc_node mm/slub.c:2774 [inline] __kmalloc_node_track_caller+0xe47/0x11f0 mm/slub.c:4382 __kmalloc_reserve net/core/skbuff.c:141 [inline] __alloc_skb+0x309/0xa50 net/core/skbuff.c:209 alloc_skb_fclone include/linux/skbuff.h:1099 [inline] sk_stream_alloc_skb+0x359/0x11c0 net/ipv4/tcp.c:877 tcp_sendmsg_locked+0x1f11/0x6a40 net/ipv4/tcp.c:1285 tcp_sendmsg+0xb2/0x100 net/ipv4/tcp.c:1436 inet_sendmsg+0x178/0x2e0 net/ipv4/af_inet.c:807 sock_sendmsg_nosec net/socket.c:639 [inline] sock_sendmsg net/socket.c:659 [inline] sock_write_iter+0x599/0x650 net/socket.c:991 call_write_iter include/linux/fs.h:1902 [inline] new_sync_write fs/read_write.c:483 [inline] __vfs_write+0xa2c/0xcb0 fs/read_write.c:496 vfs_write+0x481/0x920 fs/read_write.c:558 ksys_write+0x265/0x430 fs/read_write.c:611 __do_sys_write fs/read_write.c:623 [inline] __se_sys_write+0x92/0xb0 fs/read_write.c:620 __x64_sys_write+0x4a/0x70 fs/read_write.c:620 do_syscall_64+0xb6/0x160 arch/x86/entry/common.c:296 entry_SYSCALL_64_after_hwframe+0x44/0xa9 RIP: 0033:0x4afb40 Code: 8b 7c 24 10 48 8b 74 24 18 48 8b 54 24 20 49 c7 c2 00 00 00 00 49 c7 c0 00 00 00 00 49 c7 c1 00 00 00 00 48 8b 44 24 08 0f 05 <48> 3d 01 f0 ff ff 76 20 48 c7 44 24 28 ff ff ff ff 48 c7 44 24 30 RSP: 002b:000000c00020f620 EFLAGS: 00000206 ORIG_RAX: 0000000000000001 RAX: ffffffffffffffda RBX: 000000c00002e500 RCX: 00000000004afb40 RDX: 00000000000000f0 RSI: 000000c0002ca020 RDI: 0000000000000003 RBP: 000000c00020f670 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000206 R12: 000000000000011e R13: 000000c0003c2000 R14: 000000000000007f R15: 0000000000006962 Uninit was stored to memory at: kmsan_save_stack_with_flags mm/kmsan/kmsan.c:144 [inline] kmsan_internal_chain_origin+0xc5/0x140 mm/kmsan/kmsan.c:310 kmsan_memcpy_memmove_metadata+0x25c/0x2e0 mm/kmsan/kmsan.c:247 kmsan_memcpy_metadata+0xb/0x10 mm/kmsan/kmsan.c:267 __msan_memcpy+0x44/0x50 mm/kmsan/kmsan_instr.c:116 skb_put_data include/linux/skbuff.h:2235 [inline] sctp_packet_pack net/sctp/output.c:470 [inline] sctp_packet_transmit+0x1dd1/0x4380 net/sctp/output.c:597 sctp_outq_flush_transports net/sctp/outqueue.c:1146 [inline] sctp_outq_flush+0x1823/0x5d80 net/sctp/outqueue.c:1194 sctp_outq_uncork+0xd0/0xf0 net/sctp/outqueue.c:757 sctp_cmd_interpreter net/sctp/sm_sideeffect.c:1786 [inline] sctp_side_effects net/sctp/sm_sideeffect.c:1189 [inline] sctp_do_sm+0x9105/0x9760 net/sctp/sm_sideeffect.c:1160 sctp_generate_heartbeat_event+0x3c6/0x5a0 net/sctp/sm_sideeffect.c:391 call_timer_fn+0x232/0x530 kernel/time/timer.c:1404 expire_timers kernel/time/timer.c:1449 [inline] __run_timers+0xd60/0x1270 kernel/time/timer.c:1773 run_timer_softirq+0x2d/0x50 kernel/time/timer.c:1786 __do_softirq+0x4a1/0x83a kernel/softirq.c:293 Uninit was stored to memory at: kmsan_save_stack_with_flags mm/kmsan/kmsan.c:144 [inline] kmsan_internal_chain_origin+0xc5/0x140 mm/kmsan/kmsan.c:310 kmsan_memcpy_memmove_metadata+0x25c/0x2e0 mm/kmsan/kmsan.c:247 kmsan_memcpy_metadata+0xb/0x10 mm/kmsan/kmsan.c:267 __msan_memcpy+0x44/0x50 mm/kmsan/kmsan_instr.c:116 skb_put_data include/linux/skbuff.h:2235 [inline] sctp_addto_chunk+0x21c/0x430 net/sctp/sm_make_chunk.c:1494 sctp_make_heartbeat+0x4eb/0x700 net/sctp/sm_make_chunk.c:1164 sctp_sf_heartbeat net/sctp/sm_statefuns.c:990 [inline] sctp_sf_sendbeat_8_3+0x18d/0xb10 net/sctp/sm_statefuns.c:1034 sctp_do_sm+0x2b4/0x9760 net/sctp/sm_sideeffect.c:1157 sctp_generate_heartbeat_event+0x3c6/0x5a0 net/sctp/sm_sideeffect.c:391 call_timer_fn+0x232/0x530 kernel/time/timer.c:1404 expire_timers kernel/time/timer.c:1449 [inline] __run_timers+0xd60/0x1270 kernel/time/timer.c:1773 run_timer_softirq+0x2d/0x50 kernel/time/timer.c:1786 __do_softirq+0x4a1/0x83a kernel/softirq.c:293 Uninit was stored to memory at: kmsan_save_stack_with_flags mm/kmsan/kmsan.c:144 [inline] kmsan_internal_chain_origin+0xc5/0x140 mm/kmsan/kmsan.c:310 kmsan_memcpy_memmove_metadata+0x25c/0x2e0 mm/kmsan/kmsan.c:247 kmsan_memcpy_metadata+0xb/0x10 mm/kmsan/kmsan.c:267 __msan_memcpy+0x44/0x50 mm/kmsan/kmsan_instr.c:116 sctp_make_heartbeat+0x3f7/0x700 net/sctp/sm_make_chunk.c:1156 sctp_sf_heartbeat net/sctp/sm_statefuns.c:990 [inline] sctp_sf_sendbeat_8_3+0x18d/0xb10 net/sctp/sm_statefuns.c:1034 sctp_do_sm+0x2b4/0x9760 net/sctp/sm_sideeffect.c:1157 sctp_generate_heartbeat_event+0x3c6/0x5a0 net/sctp/sm_sideeffect.c:391 call_timer_fn+0x232/0x530 kernel/time/timer.c:1404 expire_timers kernel/time/timer.c:1449 [inline] __run_timers+0xd60/0x1270 kernel/time/timer.c:1773 run_timer_softirq+0x2d/0x50 kernel/time/timer.c:1786 __do_softirq+0x4a1/0x83a kernel/softirq.c:293 Uninit was stored to memory at: kmsan_save_stack_with_flags mm/kmsan/kmsan.c:144 [inline] kmsan_internal_chain_origin+0xc5/0x140 mm/kmsan/kmsan.c:310 kmsan_memcpy_memmove_metadata+0x25c/0x2e0 mm/kmsan/kmsan.c:247 kmsan_memcpy_metadata+0xb/0x10 mm/kmsan/kmsan.c:267 __msan_memcpy+0x44/0x50 mm/kmsan/kmsan_instr.c:116 sctp_transport_init net/sctp/transport.c:47 [inline] sctp_transport_new+0x248/0xa20 net/sctp/transport.c:100 sctp_assoc_add_peer+0x5ba/0x2120 net/sctp/associola.c:617 sctp_process_param net/sctp/sm_make_chunk.c:2524 [inline] sctp_process_init+0x162b/0x3e30 net/sctp/sm_make_chunk.c:2345 sctp_cmd_process_init net/sctp/sm_sideeffect.c:672 [inline] sctp_cmd_interpreter net/sctp/sm_sideeffect.c:1379 [inline] sctp_side_effects net/sctp/sm_sideeffect.c:1189 [inline] sctp_do_sm+0x1a59/0x9760 net/sctp/sm_sideeffect.c:1160 sctp_assoc_bh_rcv+0x9ef/0xdb0 net/sctp/associola.c:1045 sctp_inq_push+0x300/0x420 net/sctp/inqueue.c:80 sctp_backlog_rcv+0x2eb/0x1240 net/sctp/input.c:344 sk_backlog_rcv include/net/sock.h:949 [inline] __release_sock+0x448/0x640 net/core/sock.c:2437 release_sock+0x99/0x2a0 net/core/sock.c:2953 sctp_wait_for_connect+0x3d7/0x840 net/sctp/socket.c:9282 __sctp_connect+0x1e9d/0x1f20 net/sctp/socket.c:1226 __sctp_setsockopt_connectx net/sctp/socket.c:1322 [inline] sctp_setsockopt_connectx_old net/sctp/socket.c:1338 [inline] sctp_setsockopt+0x91a3/0x18c00 net/sctp/socket.c:4693 sock_common_setsockopt+0x13b/0x170 net/core/sock.c:3149 __sys_setsockopt+0x7c3/0xa30 net/socket.c:2117 __do_sys_setsockopt net/socket.c:2133 [inline] __se_sys_setsockopt+0xdd/0x100 net/socket.c:2130 __x64_sys_setsockopt+0x62/0x80 net/socket.c:2130 do_syscall_64+0xb6/0x160 arch/x86/entry/common.c:296 entry_SYSCALL_64_after_hwframe+0x44/0xa9 Local variable ----addr.i@sctp_process_init created at: sctp_process_param net/sctp/sm_make_chunk.c:2495 [inline] sctp_process_init+0x603/0x3e30 net/sctp/sm_make_chunk.c:2345 sctp_process_param net/sctp/sm_make_chunk.c:2495 [inline] sctp_process_init+0x603/0x3e30 net/sctp/sm_make_chunk.c:2345 =====================================================