bisecting fixing commit since 555161ee1b7a74e77ca70fd14ed8a5137c8108ac building syzkaller on 2e29b534005e52c57d726201644ea28ba33a9a3d testing commit 555161ee1b7a74e77ca70fd14ed8a5137c8108ac with gcc (GCC) 8.4.1 20210217 kernel signature: 6d16430c87f4329cfdd9af743a19d89cdb1fac7ebf6f705be4265ba270b27c59 run #0: crashed: KASAN: slab-out-of-bounds Read in scatterwalk_copychunks run #1: crashed: KASAN: slab-out-of-bounds Read in scatterwalk_copychunks run #2: crashed: KASAN: slab-out-of-bounds Read in scatterwalk_copychunks run #3: crashed: general protection fault in scatterwalk_copychunks run #4: crashed: general protection fault in scatterwalk_copychunks run #5: crashed: general protection fault in scatterwalk_copychunks run #6: crashed: general protection fault in scatterwalk_copychunks run #7: crashed: KASAN: slab-out-of-bounds Read in scatterwalk_copychunks run #8: crashed: KASAN: slab-out-of-bounds Read in scatterwalk_copychunks run #9: crashed: general protection fault in scatterwalk_copychunks run #10: crashed: KASAN: slab-out-of-bounds Read in scatterwalk_copychunks run #11: crashed: general protection fault in scatterwalk_copychunks run #12: crashed: general protection fault in scatterwalk_copychunks run #13: crashed: general protection fault in scatterwalk_copychunks run #14: crashed: KASAN: slab-out-of-bounds Read in scatterwalk_copychunks run #15: crashed: KASAN: slab-out-of-bounds Read in scatterwalk_copychunks run #16: crashed: KASAN: slab-out-of-bounds Read in scatterwalk_copychunks run #17: crashed: general protection fault in scatterwalk_copychunks run #18: crashed: KASAN: slab-out-of-bounds Read in scatterwalk_copychunks run #19: crashed: KASAN: slab-out-of-bounds Read in scatterwalk_copychunks testing current HEAD fcfbdfe9626edd5bf00c732e093eed249ecdbfa1 testing commit fcfbdfe9626edd5bf00c732e093eed249ecdbfa1 with gcc (GCC) 8.4.1 20210217 kernel signature: e17b289d53eeef135ac1712a55ce10c0f3ab8ffdd2766c5c6d430ac246155081 run #0: crashed: general protection fault in scatterwalk_copychunks run #1: crashed: KASAN: slab-out-of-bounds Read in scatterwalk_copychunks run #2: crashed: general protection fault in scatterwalk_copychunks run #3: crashed: general protection fault in scatterwalk_copychunks run #4: crashed: general protection fault in scatterwalk_copychunks run #5: crashed: general protection fault in scatterwalk_copychunks run #6: crashed: general protection fault in scatterwalk_copychunks run #7: crashed: general protection fault in scatterwalk_copychunks run #8: crashed: general protection fault in scatterwalk_copychunks run #9: crashed: KASAN: slab-out-of-bounds Read in scatterwalk_copychunks revisions tested: 2, total time: 24m0.269960066s (build: 16m13.701577843s, test: 7m4.239433085s) the crash still happens on HEAD commit msg: Linux 4.19.197 crash: KASAN: slab-out-of-bounds Read in scatterwalk_copychunks RDX: 0000000000000004 RSI: 0000000000000000 RDI: 0000000000000003 RBP: 0000000000000001 R08: 000000011d100000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000005 R13: 00000000004f8ff8 R14: 00000000004b500d R15: 00007f7e8977a6bc ================================================================== BUG: KASAN: slab-out-of-bounds in memcpy include/linux/string.h:377 [inline] BUG: KASAN: slab-out-of-bounds in memcpy_dir crypto/scatterwalk.c:28 [inline] BUG: KASAN: slab-out-of-bounds in scatterwalk_copychunks+0x1e1/0x610 crypto/scatterwalk.c:43 Read of size 4096 at addr ffff8881e9d77000 by task syz-executor.5/6590 CPU: 1 PID: 6590 Comm: syz-executor.5 Not tainted 4.19.197-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+0x123/0x171 lib/dump_stack.c:118 print_address_description.cold.8+0x9/0x1ff mm/kasan/report.c:256 kasan_report_error mm/kasan/report.c:354 [inline] kasan_report mm/kasan/report.c:412 [inline] kasan_report.cold.9+0x242/0x2fe mm/kasan/report.c:396 check_memory_region_inline mm/kasan/kasan.c:260 [inline] check_memory_region+0x13e/0x1b0 mm/kasan/kasan.c:267 memcpy+0x23/0x50 mm/kasan/kasan.c:302 memcpy include/linux/string.h:377 [inline] memcpy_dir crypto/scatterwalk.c:28 [inline] scatterwalk_copychunks+0x1e1/0x610 crypto/scatterwalk.c:43 scatterwalk_map_and_copy crypto/scatterwalk.c:72 [inline] scatterwalk_map_and_copy+0x128/0x190 crypto/scatterwalk.c:60 gcmaes_encrypt.constprop.15+0x6d6/0xda0 arch/x86/crypto/aesni-intel_glue.c:956 generic_gcmaes_encrypt+0xfd/0x150 arch/x86/crypto/aesni-intel_glue.c:1297 crypto_aead_encrypt include/crypto/aead.h:337 [inline] gcmaes_wrapper_encrypt+0x109/0x180 arch/x86/crypto/aesni-intel_glue.c:1130 crypto_aead_encrypt include/crypto/aead.h:337 [inline] tls_do_encryption net/tls/tls_sw.c:193 [inline] tls_push_record+0x9ae/0x1600 net/tls/tls_sw.c:228 tls_sw_sendpage+0x462/0xc00 net/tls/tls_sw.c:585 inet_sendpage+0x122/0x600 net/ipv4/af_inet.c:815 kernel_sendpage+0x60/0xd0 net/socket.c:3581 sock_sendpage+0x6d/0xd0 net/socket.c:912 pipe_to_sendpage+0x212/0x430 fs/splice.c:452 splice_from_pipe_feed fs/splice.c:503 [inline] __splice_from_pipe+0x2cb/0x720 fs/splice.c:627 splice_from_pipe+0xbb/0x120 fs/splice.c:662 generic_splice_sendpage+0x10/0x20 fs/splice.c:833 do_splice_from fs/splice.c:852 [inline] do_splice+0xa25/0x12b0 fs/splice.c:1154 __do_sys_splice fs/splice.c:1428 [inline] __se_sys_splice fs/splice.c:1408 [inline] __x64_sys_splice+0x248/0x300 fs/splice.c:1408 do_syscall_64+0xd0/0x4e0 arch/x86/entry/common.c:293 entry_SYSCALL_64_after_hwframe+0x49/0xbe RIP: 0033:0x461229 Code: ff ff c3 66 2e 0f 1f 84 00 00 00 00 00 0f 1f 40 00 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 73 01 c3 48 c7 c1 bc ff ff ff f7 d8 64 89 01 48 RSP: 002b:00007f63a3aea1a8 EFLAGS: 00000246 ORIG_RAX: 0000000000000113 RAX: ffffffffffffffda RBX: 000000000052bf00 RCX: 0000000000461229 RDX: 0000000000000004 RSI: 0000000000000000 RDI: 0000000000000003 RBP: 0000000000000001 R08: 000000011d100000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000005 R13: 00000000004f8ff8 R14: 00000000004b500d R15: 00007f63a3aea6bc Allocated by task 3313: save_stack+0x43/0xd0 mm/kasan/kasan.c:448 set_track mm/kasan/kasan.c:460 [inline] kasan_kmalloc mm/kasan/kasan.c:553 [inline] kasan_kmalloc+0xc7/0xe0 mm/kasan/kasan.c:531 kasan_slab_alloc+0x12/0x20 mm/kasan/kasan.c:490 kmem_cache_alloc+0x12e/0x720 mm/slab.c:3559 dst_alloc+0xa3/0x160 net/core/dst.c:105 ip6_dst_alloc+0x24/0x80 net/ipv6/route.c:357 icmp6_dst_alloc+0x5c/0x3f0 net/ipv6/route.c:2731 mld_sendpack+0x598/0xcd0 net/ipv6/mcast.c:1670 mld_send_initial_cr.part.32+0xd7/0x110 net/ipv6/mcast.c:2098 mld_send_initial_cr net/ipv6/mcast.c:2082 [inline] mld_dad_timer_expire+0x29/0x150 net/ipv6/mcast.c:2117 call_timer_fn+0x14c/0x510 kernel/time/timer.c:1338 expire_timers kernel/time/timer.c:1375 [inline] __run_timers kernel/time/timer.c:1696 [inline] __run_timers kernel/time/timer.c:1664 [inline] run_timer_softirq+0xb63/0x1180 kernel/time/timer.c:1709 __do_softirq+0x25f/0x919 kernel/softirq.c:292 Freed by task 9: save_stack+0x43/0xd0 mm/kasan/kasan.c:448 set_track mm/kasan/kasan.c:460 [inline] __kasan_slab_free+0x102/0x150 mm/kasan/kasan.c:521 kasan_slab_free+0xe/0x10 mm/kasan/kasan.c:528 __cache_free mm/slab.c:3503 [inline] kmem_cache_free+0x83/0x290 mm/slab.c:3765 dst_destroy+0x1f3/0x330 net/core/dst.c:141 dst_destroy_rcu+0xd/0x10 net/core/dst.c:154 __rcu_reclaim kernel/rcu/rcu.h:236 [inline] rcu_do_batch kernel/rcu/tree.c:2584 [inline] invoke_rcu_callbacks kernel/rcu/tree.c:2897 [inline] __rcu_process_callbacks kernel/rcu/tree.c:2864 [inline] rcu_process_callbacks+0xbcd/0x19a0 kernel/rcu/tree.c:2881 __do_softirq+0x25f/0x919 kernel/softirq.c:292 The buggy address belongs to the object at ffff8881e9d77080 which belongs to the cache ip6_dst_cache of size 240 The buggy address is located 128 bytes to the left of 240-byte region [ffff8881e9d77080, ffff8881e9d77170) The buggy address belongs to the page: page:ffffea0007a75dc0 count:1 mapcount:0 mapping:ffff8881e5d82e40 index:0x0 flags: 0x2fffc0000000100(slab) raw: 02fffc0000000100 ffffea0007913148 ffffea0007433dc8 ffff8881e5d82e40 raw: 0000000000000000 ffff8881e9d77080 000000010000000c 0000000000000000 page dumped because: kasan: bad access detected Memory state around the buggy address: ffff8881e9d76f00: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 ffff8881e9d76f80: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 >ffff8881e9d77000: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc ^ ffff8881e9d77080: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb ffff8881e9d77100: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fc fc ================================================================== kasan: CONFIG_KASAN_INLINE enabled kasan: GPF could be caused by NULL-ptr deref or user memory access CPU: 1 PID: 6594 Comm: syz-executor.1 Tainted: G B 4.19.197-syzkaller #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 general protection fault: 0000 [#1] PREEMPT SMP KASAN Call Trace: CPU: 0 PID: 6596 Comm: syz-executor.3 Tainted: G B 4.19.197-syzkaller #0 __dump_stack lib/dump_stack.c:77 [inline] dump_stack+0x123/0x171 lib/dump_stack.c:118 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 fail_dump lib/fault-inject.c:51 [inline] should_fail.cold.4+0x5/0xa lib/fault-inject.c:149 RIP: 0010:scatterwalk_start include/crypto/scatterwalk.h:73 [inline] RIP: 0010:scatterwalk_pagedone include/crypto/scatterwalk.h:98 [inline] RIP: 0010:scatterwalk_pagedone include/crypto/scatterwalk.h:82 [inline] RIP: 0010:scatterwalk_copychunks+0x379/0x610 crypto/scatterwalk.c:55 Code: ff ff 48 89 c7 e8 97 34 2a 00 4c 89 f2 48 c1 ea 03 42 80 3c 3a 00 0f 85 a8 01 00 00 48 8d 70 08 49 89 06 48 89 f2 48 c1 ea 03 <42> 0f b6 14 3a 84 d2 74 09 80 fa 03 0f 8e 6b 01 00 00 48 8b 5d d0 RSP: 0018:ffff8881df0f7498 EFLAGS: 00010202 RAX: 0000000000000000 RBX: ffff8881e04ba32c RCX: 000000000000401d __should_failslab+0xba/0xf0 mm/failslab.c:32 RDX: 0000000000000001 RSI: 0000000000000008 RDI: ffff8881e04ba320 should_failslab+0x9/0x20 mm/slab_common.c:1588 RBP: ffff8881df0f74f8 R08: ffffed103c617804 R09: ffffed103c617800 slab_pre_alloc_hook mm/slab.h:424 [inline] slab_alloc mm/slab.c:3383 [inline] __do_kmalloc mm/slab.c:3725 [inline] __kmalloc+0x2dd/0x770 mm/slab.c:3736 R10: 0000000000000000 R11: ffff8881e30bc01c R12: 0000000000001000 R13: 000000000000001d R14: ffff8881df0f7538 R15: dffffc0000000000 FS: 00007f7e8977a700(0000) GS:ffff8881f6800000(0000) knlGS:0000000000000000 kmalloc include/linux/slab.h:520 [inline] aead_request_alloc include/crypto/aead.h:427 [inline] tls_push_record+0xff/0x1600 net/tls/tls_sw.c:209 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 tls_sw_sendpage+0x462/0xc00 net/tls/tls_sw.c:585 CR2: 00007f8276cf5710 CR3: 00000001d0e9d001 CR4: 00000000001606f0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 inet_sendpage+0x122/0x600 net/ipv4/af_inet.c:815 Call Trace: scatterwalk_map_and_copy crypto/scatterwalk.c:72 [inline] scatterwalk_map_and_copy+0x128/0x190 crypto/scatterwalk.c:60 kernel_sendpage+0x60/0xd0 net/socket.c:3581 sock_sendpage+0x6d/0xd0 net/socket.c:912 pipe_to_sendpage+0x212/0x430 fs/splice.c:452 gcmaes_encrypt.constprop.15+0x81b/0xda0 arch/x86/crypto/aesni-intel_glue.c:980 splice_from_pipe_feed fs/splice.c:503 [inline] __splice_from_pipe+0x2cb/0x720 fs/splice.c:627 splice_from_pipe+0xbb/0x120 fs/splice.c:662 generic_splice_sendpage+0x10/0x20 fs/splice.c:833 do_splice_from fs/splice.c:852 [inline] do_splice+0xa25/0x12b0 fs/splice.c:1154 generic_gcmaes_encrypt+0xfd/0x150 arch/x86/crypto/aesni-intel_glue.c:1297 __do_sys_splice fs/splice.c:1428 [inline] __se_sys_splice fs/splice.c:1408 [inline] __x64_sys_splice+0x248/0x300 fs/splice.c:1408 do_syscall_64+0xd0/0x4e0 arch/x86/entry/common.c:293 entry_SYSCALL_64_after_hwframe+0x49/0xbe crypto_aead_encrypt include/crypto/aead.h:337 [inline] gcmaes_wrapper_encrypt+0x109/0x180 arch/x86/crypto/aesni-intel_glue.c:1130 RIP: 0033:0x461229 crypto_aead_encrypt include/crypto/aead.h:337 [inline] tls_do_encryption net/tls/tls_sw.c:193 [inline] tls_push_record+0x9ae/0x1600 net/tls/tls_sw.c:228 Code: ff ff c3 66 2e 0f 1f 84 00 00 00 00 00 0f 1f 40 00 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 73 01 c3 48 c7 c1 bc ff ff ff f7 d8 64 89 01 48 RSP: 002b:00007f6bc7bfe1a8 EFLAGS: 00000246 ORIG_RAX: 0000000000000113 tls_sw_sendpage+0x462/0xc00 net/tls/tls_sw.c:585 RAX: ffffffffffffffda RBX: 000000000052bf00 RCX: 0000000000461229 RDX: 0000000000000004 RSI: 0000000000000000 RDI: 0000000000000003 RBP: 0000000000000001 R08: 000000011d100000 R09: 0000000000000000 inet_sendpage+0x122/0x600 net/ipv4/af_inet.c:815 R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000005 R13: 00000000004f8ff8 R14: 00000000004b500d R15: 00007f6bc7bfe6bc kernel_sendpage+0x60/0xd0 net/socket.c:3581 sock_sendpage+0x6d/0xd0 net/socket.c:912 pipe_to_sendpage+0x212/0x430 fs/splice.c:452 splice_from_pipe_feed fs/splice.c:503 [inline] __splice_from_pipe+0x2cb/0x720 fs/splice.c:627 splice_from_pipe+0xbb/0x120 fs/splice.c:662 generic_splice_sendpage+0x10/0x20 fs/splice.c:833 do_splice_from fs/splice.c:852 [inline] do_splice+0xa25/0x12b0 fs/splice.c:1154 __do_sys_splice fs/splice.c:1428 [inline] __se_sys_splice fs/splice.c:1408 [inline] __x64_sys_splice+0x248/0x300 fs/splice.c:1408 do_syscall_64+0xd0/0x4e0 arch/x86/entry/common.c:293 entry_SYSCALL_64_after_hwframe+0x49/0xbe RIP: 0033:0x461229 Code: ff ff c3 66 2e 0f 1f 84 00 00 00 00 00 0f 1f 40 00 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 73 01 c3 48 c7 c1 bc ff ff ff f7 d8 64 89 01 48 RSP: 002b:00007f7e8977a1a8 EFLAGS: 00000246 ORIG_RAX: 0000000000000113 RAX: ffffffffffffffda RBX: 000000000052bf00 RCX: 0000000000461229 RDX: 0000000000000004 RSI: 0000000000000000 RDI: 0000000000000003 RBP: 0000000000000001 R08: 000000011d100000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000005 R13: 00000000004f8ff8 R14: 00000000004b500d R15: 00007f7e8977a6bc Modules linked in: kasan: CONFIG_KASAN_INLINE enabled kasan: GPF could be caused by NULL-ptr deref or user memory access CPU: 0 PID: 6584 Comm: syz-executor.2 Tainted: G B D 4.19.197-syzkaller #0 general protection fault: 0000 [#2] PREEMPT SMP KASAN Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 CPU: 1 PID: 6590 Comm: syz-executor.5 Tainted: G B D 4.19.197-syzkaller #0 Call Trace: Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 __dump_stack lib/dump_stack.c:77 [inline] dump_stack+0x123/0x171 lib/dump_stack.c:118 RIP: 0010:scatterwalk_start include/crypto/scatterwalk.h:73 [inline] RIP: 0010:scatterwalk_pagedone include/crypto/scatterwalk.h:98 [inline] RIP: 0010:scatterwalk_pagedone include/crypto/scatterwalk.h:82 [inline] RIP: 0010:scatterwalk_copychunks+0x379/0x610 crypto/scatterwalk.c:55 fail_dump lib/fault-inject.c:51 [inline] should_fail.cold.4+0x5/0xa lib/fault-inject.c:149 Code: ff ff 48 89 c7 e8 97 34 2a 00 4c 89 f2 48 c1 ea 03 42 80 3c 3a 00 0f 85 a8 01 00 00 48 8d 70 08 49 89 06 48 89 f2 48 c1 ea 03 <42> 0f b6 14 3a 84 d2 74 09 80 fa 03 0f 8e 6b 01 00 00 48 8b 5d d0 RSP: 0018:ffff8881d6577498 EFLAGS: 00010202 RAX: 0000000000000000 RBX: ffff8881df8273ac RCX: 000000000000401d RDX: 0000000000000001 RSI: 0000000000000008 RDI: ffff8881df8273a0 __should_failslab+0xba/0xf0 mm/failslab.c:32 RBP: ffff8881d65774f8 R08: ffffed103c1a6804 R09: ffffed103c1a6800 should_failslab+0x9/0x20 mm/slab_common.c:1588 R10: 0000000000000000 R11: ffff8881e0d3401c R12: 0000000000001000 slab_pre_alloc_hook mm/slab.h:424 [inline] slab_alloc_node mm/slab.c:3304 [inline] kmem_cache_alloc_node_trace+0x265/0x730 mm/slab.c:3666 R13: 000000000000001d R14: ffff8881d6577538 R15: dffffc0000000000 __do_kmalloc_node mm/slab.c:3688 [inline] __kmalloc_node_track_caller+0x3c/0x70 mm/slab.c:3703 FS: 00007f63a3aea700(0000) GS:ffff8881f6900000(0000) knlGS:0000000000000000 __kmalloc_reserve.isra.39+0x2c/0xc0 net/core/skbuff.c:137 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 __alloc_skb+0xd7/0x580 net/core/skbuff.c:205 CR2: 00000000200000c0 CR3: 00000001e12a6005 CR4: 00000000001606e0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 Call Trace: scatterwalk_map_and_copy crypto/scatterwalk.c:72 [inline] scatterwalk_map_and_copy+0x128/0x190 crypto/scatterwalk.c:60 alloc_skb_fclone include/linux/skbuff.h:1037 [inline] sk_stream_alloc_skb+0x9e/0x810 net/ipv4/tcp.c:884 do_tcp_sendpages+0x774/0x1d30 net/ipv4/tcp.c:1003 gcmaes_encrypt.constprop.15+0x81b/0xda0 arch/x86/crypto/aesni-intel_glue.c:980 tcp_sendpage_locked net/ipv4/tcp.c:1106 [inline] tcp_sendpage_locked+0x63/0xa0 net/ipv4/tcp.c:1098 tcp_sendpage+0x37/0x50 net/ipv4/tcp.c:1116 inet_sendpage+0x122/0x600 net/ipv4/af_inet.c:815 kernel_sendpage+0x60/0xd0 net/socket.c:3581 generic_gcmaes_encrypt+0xfd/0x150 arch/x86/crypto/aesni-intel_glue.c:1297 sock_sendpage+0x6d/0xd0 net/socket.c:912 pipe_to_sendpage+0x212/0x430 fs/splice.c:452 crypto_aead_encrypt include/crypto/aead.h:337 [inline] gcmaes_wrapper_encrypt+0x109/0x180 arch/x86/crypto/aesni-intel_glue.c:1130 splice_from_pipe_feed fs/splice.c:503 [inline] __splice_from_pipe+0x2cb/0x720 fs/splice.c:627 crypto_aead_encrypt include/crypto/aead.h:337 [inline] tls_do_encryption net/tls/tls_sw.c:193 [inline] tls_push_record+0x9ae/0x1600 net/tls/tls_sw.c:228 tls_sw_sendpage+0x462/0xc00 net/tls/tls_sw.c:585 splice_from_pipe+0xbb/0x120 fs/splice.c:662 inet_sendpage+0x122/0x600 net/ipv4/af_inet.c:815 generic_splice_sendpage+0x10/0x20 fs/splice.c:833 do_splice_from fs/splice.c:852 [inline] do_splice+0xa25/0x12b0 fs/splice.c:1154 kernel_sendpage+0x60/0xd0 net/socket.c:3581 sock_sendpage+0x6d/0xd0 net/socket.c:912 __do_sys_splice fs/splice.c:1428 [inline] __se_sys_splice fs/splice.c:1408 [inline] __x64_sys_splice+0x248/0x300 fs/splice.c:1408 pipe_to_sendpage+0x212/0x430 fs/splice.c:452 do_syscall_64+0xd0/0x4e0 arch/x86/entry/common.c:293 entry_SYSCALL_64_after_hwframe+0x49/0xbe RIP: 0033:0x461229 Code: ff ff c3 66 2e 0f 1f 84 00 00 00 00 00 0f 1f 40 00 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 73 01 c3 48 c7 c1 bc ff ff ff f7 d8 64 89 01 48 splice_from_pipe_feed fs/splice.c:503 [inline] __splice_from_pipe+0x2cb/0x720 fs/splice.c:627 RSP: 002b:00007f09df1291a8 EFLAGS: 00000246 ORIG_RAX: 0000000000000113 RAX: ffffffffffffffda RBX: 000000000052bfa8 RCX: 0000000000461229 RDX: 0000000000000004 RSI: 0000000000000000 RDI: 0000000000000003 splice_from_pipe+0xbb/0x120 fs/splice.c:662 RBP: 0000000000000001 R08: 000000011d100000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000005 R13: 00000000004f8ff8 R14: 00000000004b500d R15: 00007f09df1296bc generic_splice_sendpage+0x10/0x20 fs/splice.c:833 do_splice_from fs/splice.c:852 [inline] do_splice+0xa25/0x12b0 fs/splice.c:1154 __do_sys_splice fs/splice.c:1428 [inline] __se_sys_splice fs/splice.c:1408 [inline] __x64_sys_splice+0x248/0x300 fs/splice.c:1408 do_syscall_64+0xd0/0x4e0 arch/x86/entry/common.c:293 entry_SYSCALL_64_after_hwframe+0x49/0xbe RIP: 0033:0x461229 Code: ff ff c3 66 2e 0f 1f 84 00 00 00 00 00 0f 1f 40 00 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 73 01 c3 48 c7 c1 bc ff ff ff f7 d8 64 89 01 48 ---[ end trace de426be1321b5751 ]--- RSP: 002b:00007f63a3aea1a8 EFLAGS: 00000246 ORIG_RAX: 0000000000000113 RAX: ffffffffffffffda RBX: 000000000052bf00 RCX: 0000000000461229 RDX: 0000000000000004 RSI: 0000000000000000 RDI: 0000000000000003 RBP: 0000000000000001 R08: 000000011d100000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000005 R13: 00000000004f8ff8 R14: 00000000004b500d R15: 00007f63a3aea6bc Modules linked in: FAULT_INJECTION: forcing a failure. name fail_page_alloc, interval 1, probability 0, space 0, times 0 FAULT_INJECTION: forcing a failure. name failslab, interval 1, probability 0, space 0, times 0 CPU: 1 PID: 6607 Comm: syz-executor.4 Tainted: G B D 4.19.197-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+0x123/0x171 lib/dump_stack.c:118 fail_dump lib/fault-inject.c:51 [inline] should_fail.cold.4+0x5/0xa lib/fault-inject.c:149 RIP: 0010:scatterwalk_start include/crypto/scatterwalk.h:73 [inline] RIP: 0010:scatterwalk_pagedone include/crypto/scatterwalk.h:98 [inline] RIP: 0010:scatterwalk_pagedone include/crypto/scatterwalk.h:82 [inline] RIP: 0010:scatterwalk_copychunks+0x379/0x610 crypto/scatterwalk.c:55 Code: ff ff 48 89 c7 e8 97 34 2a 00 4c 89 f2 48 c1 ea 03 42 80 3c 3a 00 0f 85 a8 01 00 00 48 8d 70 08 49 89 06 48 89 f2 48 c1 ea 03 <42> 0f b6 14 3a 84 d2 74 09 80 fa 03 0f 8e 6b 01 00 00 48 8b 5d d0 RSP: 0018:ffff8881df0f7498 EFLAGS: 00010202 should_fail_alloc_page mm/page_alloc.c:3088 [inline] prepare_alloc_pages mm/page_alloc.c:4346 [inline] __alloc_pages_nodemask+0x1d5/0x710 mm/page_alloc.c:4393 __alloc_pages include/linux/gfp.h:496 [inline] __alloc_pages_node include/linux/gfp.h:509 [inline] kmem_getpages mm/slab.c:1412 [inline] cache_grow_begin+0x91/0x8d0 mm/slab.c:2682 RAX: 0000000000000000 RBX: ffff8881e04ba32c RCX: 000000000000401d cache_alloc_refill mm/slab.c:3049 [inline] ____cache_alloc mm/slab.c:3132 [inline] ____cache_alloc mm/slab.c:3115 [inline] slab_alloc_node mm/slab.c:3327 [inline] kmem_cache_alloc_node+0x65b/0x720 mm/slab.c:3647 __alloc_skb+0xa7/0x580 net/core/skbuff.c:193 RDX: 0000000000000001 RSI: 0000000000000008 RDI: ffff8881e04ba320 alloc_skb_fclone include/linux/skbuff.h:1037 [inline] sk_stream_alloc_skb+0x9e/0x810 net/ipv4/tcp.c:884 RBP: ffff8881df0f74f8 R08: ffffed103c617804 R09: ffffed103c617800 do_tcp_sendpages+0x774/0x1d30 net/ipv4/tcp.c:1003 R10: 0000000000000000 R11: ffff8881e30bc01c R12: 0000000000001000 R13: 000000000000001d R14: ffff8881df0f7538 R15: dffffc0000000000 FS: 00007f7e8977a700(0000) GS:ffff8881f6800000(0000) knlGS:0000000000000000 tcp_sendpage_locked net/ipv4/tcp.c:1106 [inline] tcp_sendpage_locked+0x63/0xa0 net/ipv4/tcp.c:1098 tcp_sendpage+0x37/0x50 net/ipv4/tcp.c:1116 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 inet_sendpage+0x122/0x600 net/ipv4/af_inet.c:815 kernel_sendpage+0x60/0xd0 net/socket.c:3581 sock_sendpage+0x6d/0xd0 net/socket.c:912 pipe_to_sendpage+0x212/0x430 fs/splice.c:452 CR2: 00007f084bc06000 CR3: 00000001d0e9d002 CR4: 00000000001606f0 splice_from_pipe_feed fs/splice.c:503 [inline] __splice_from_pipe+0x2cb/0x720 fs/splice.c:627 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 splice_from_pipe+0xbb/0x120 fs/splice.c:662 generic_splice_sendpage+0x10/0x20 fs/splice.c:833 do_splice_from fs/splice.c:852 [inline] do_splice+0xa25/0x12b0 fs/splice.c:1154 __do_sys_splice fs/splice.c:1428 [inline] __se_sys_splice fs/splice.c:1408 [inline] __x64_sys_splice+0x248/0x300 fs/splice.c:1408 do_syscall_64+0xd0/0x4e0 arch/x86/entry/common.c:293 entry_SYSCALL_64_after_hwframe+0x49/0xbe RIP: 0033:0x461229 Code: ff ff c3 66 2e 0f 1f 84 00 00 00 00 00 0f 1f 40 00 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 73 01 c3 48 c7 c1 bc ff ff ff f7 d8 64 89 01 48