bisecting fixing commit since 555161ee1b7a74e77ca70fd14ed8a5137c8108ac
building syzkaller on 2e29b534005e52c57d726201644ea28ba33a9a3d
testing commit 555161ee1b7a74e77ca70fd14ed8a5137c8108ac with gcc (GCC) 8.1.0
kernel signature: 29d84a0619bcc8cf09cf3a0d4f1197a63295675214d5931cdd83176dfd8b0ec2
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: KASAN: use-after-free Read in scatterwalk_copychunks
run #4: crashed: KASAN: slab-out-of-bounds Read in scatterwalk_copychunks
run #5: crashed: general protection fault in scatterwalk_copychunks
run #6: crashed: KASAN: use-after-free Read 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: KASAN: slab-out-of-bounds Read in scatterwalk_copychunks
testing current HEAD 7472c4028e2357202949f99ad94c5a5a34f95666
testing commit 7472c4028e2357202949f99ad94c5a5a34f95666 with gcc (GCC) 8.1.0
kernel signature: 1a0e42c384fea21a065aa7b48d922b19c31664a9a68c1909084ac27d98029a27
run #0: crashed: general protection fault in scatterwalk_copychunks
run #1: crashed: general protection fault in scatterwalk_copychunks
run #2: crashed: KASAN: use-after-free Read in scatterwalk_copychunks
run #3: crashed: general protection fault in scatterwalk_copychunks
run #4: crashed: general protection fault in corrupted
run #5: crashed: general protection fault in scatterwalk_copychunks
run #6: crashed: KASAN: slab-out-of-bounds Read in scatterwalk_copychunks
run #7: crashed: general protection fault in scatterwalk_copychunks
run #8: crashed: KASAN: slab-out-of-bounds Read in scatterwalk_copychunks
run #9: crashed: general protection fault in scatterwalk_copychunks
revisions tested: 2, total time: 26m45.270901294s (build: 17m32.303314334s, test: 7m55.675757008s)
the crash still happens on HEAD
commit msg: Linux 4.19.108
crash: general protection fault in scatterwalk_copychunks
kasan: GPF could be caused by NULL-ptr deref or user memory access
 alloc_skb_fclone include/linux/skbuff.h:1037 [inline]
 sk_stream_alloc_skb+0x9e/0x810 net/ipv4/tcp.c:874
 do_tcp_sendpages+0x772/0x1e10 net/ipv4/tcp.c:993
general protection fault: 0000 [#1] PREEMPT SMP KASAN
CPU: 1 PID: 7150 Comm: syz-executor.5 Not tainted 4.19.108-syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
RIP: 0010:scatterwalk_start include/crypto/scatterwalk.h:73 [inline]
RIP: 0010:scatterwalk_pagedone include/crypto/scatterwalk.h:98 [inline]
RIP: 0010:scatterwalk_copychunks+0x379/0x610 crypto/scatterwalk.c:55
Code: ff ff 48 89 c7 e8 27 fa 29 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
 tcp_sendpage_locked+0x63/0xa0 net/ipv4/tcp.c:1096
RSP: 0018:ffff88809484f498 EFLAGS: 00010202
 tcp_sendpage+0x37/0x50 net/ipv4/tcp.c:1106
RAX: 0000000000000000 RBX: ffff8880978c06ec RCX: 000000000000401d
 inet_sendpage+0x122/0x600 net/ipv4/af_inet.c:815
RDX: 0000000000000001 RSI: 0000000000000008 RDI: ffff8880978c06e0
RBP: ffff88809484f4f8 R08: ffffed1012a1d804 R09: ffffed1012a1d800
 kernel_sendpage+0x60/0xd0 net/socket.c:3378
 sock_sendpage+0x6d/0xd0 net/socket.c:847
 pipe_to_sendpage+0x212/0x430 fs/splice.c:452
R10: 0000000000000000 R11: ffff8880950ec01c R12: 0000000000001000
R13: 000000000000001d R14: ffff88809484f538 R15: dffffc0000000000
 splice_from_pipe_feed fs/splice.c:503 [inline]
 __splice_from_pipe+0x2cb/0x720 fs/splice.c:627
FS:  00007fc0d7f78700(0000) GS:ffff8880aeb00000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 0000000002007000 CR3: 0000000093a1e000 CR4: 00000000001406e0
 splice_from_pipe+0xbb/0x120 fs/splice.c:662
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Call Trace:
 generic_splice_sendpage+0x10/0x20 fs/splice.c:833
 scatterwalk_map_and_copy+0x128/0x190 crypto/scatterwalk.c:72
 do_splice_from fs/splice.c:852 [inline]
 do_splice+0x4fd/0x12d0 fs/splice.c:1154
 gcmaes_encrypt.constprop.15+0x81b/0xda0 arch/x86/crypto/aesni-intel_glue.c:980
 __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: 0033:0x459a29
Code: fd b7 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 cb b7 fb ff c3 66 2e 0f 1f 84 00 00 00 00
RSP: 002b:00007fd3c6d04c78 EFLAGS: 00000246 ORIG_RAX: 0000000000000113
RAX: ffffffffffffffda RBX: 00007fd3c6d04c90 RCX: 0000000000459a29
RDX: 0000000000000004 RSI: 0000000000000000 RDI: 0000000000000003
RBP: 000000000075bfc8 R08: 000000011d100000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 00007fd3c6d056d4
R13: 00000000004c9478 R14: 00000000004dfdd8 R15: 0000000000000005
IPv6: ADDRCONF(NETDEV_UP): veth1_to_hsr: link is not ready
 generic_gcmaes_encrypt+0xfd/0x150 arch/x86/crypto/aesni-intel_glue.c:1297
 crypto_aead_encrypt include/crypto/aead.h:335 [inline]
 gcmaes_wrapper_encrypt+0x109/0x180 arch/x86/crypto/aesni-intel_glue.c:1130
 crypto_aead_encrypt include/crypto/aead.h:335 [inline]
 tls_do_encryption net/tls/tls_sw.c:193 [inline]
 tls_push_record+0x966/0x1720 net/tls/tls_sw.c:228
 tls_sw_sendpage+0x458/0xc00 net/tls/tls_sw.c:585
 inet_sendpage+0x122/0x600 net/ipv4/af_inet.c:815
 kernel_sendpage+0x60/0xd0 net/socket.c:3378
 sock_sendpage+0x6d/0xd0 net/socket.c:847
 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+0x4fd/0x12d0 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: 0033:0x459a29
Code: fd b7 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 cb b7 fb ff c3 66 2e 0f 1f 84 00 00 00 00
RSP: 002b:00007fc0d7f77c78 EFLAGS: 00000246 ORIG_RAX: 0000000000000113
RAX: ffffffffffffffda RBX: 00007fc0d7f77c90 RCX: 0000000000459a29
RDX: 0000000000000004 RSI: 0000000000000000 RDI: 0000000000000003
RBP: 000000000075bf20 R08: 000000011d100000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 00007fc0d7f786d4
R13: 00000000004c9478 R14: 00000000004dfdd8 R15: 0000000000000005
Modules linked in:
---[ end trace 9b2d72a56402f8d8 ]---
8021q: adding VLAN 0 to HW filter on device batadv0
RIP: 0010:scatterwalk_start include/crypto/scatterwalk.h:73 [inline]
RIP: 0010:scatterwalk_pagedone include/crypto/scatterwalk.h:98 [inline]
RIP: 0010:scatterwalk_copychunks+0x379/0x610 crypto/scatterwalk.c:55
IPv6: ADDRCONF(NETDEV_CHANGE): veth1_to_hsr: link becomes ready
Code: ff ff 48 89 c7 e8 27 fa 29 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
IPv6: ADDRCONF(NETDEV_CHANGE): hsr_slave_1: link becomes ready
RSP: 0018:ffff88809484f498 EFLAGS: 00010202
FAULT_INJECTION: forcing a failure.
name failslab, interval 1, probability 0, space 0, times 0
IPv6: ADDRCONF(NETDEV_UP): hsr0: link is not ready
FAULT_INJECTION: forcing a failure.
name fail_page_alloc, interval 1, probability 0, space 0, times 1
IPv6: ADDRCONF(NETDEV_CHANGE): hsr0: link becomes ready
CPU: 1 PID: 7159 Comm: syz-executor.0 Tainted: G      D           4.19.108-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
IPv6: ADDRCONF(NETDEV_UP): vxcan1: link is not ready
 should_fail_alloc_page mm/page_alloc.c:3086 [inline]
 prepare_alloc_pages mm/page_alloc.c:4344 [inline]
 __alloc_pages_nodemask+0x1d5/0x710 mm/page_alloc.c:4391
8021q: adding VLAN 0 to HW filter on device batadv0
 __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
 cache_alloc_refill mm/slab.c:3049 [inline]
 ____cache_alloc mm/slab.c:3132 [inline]
 slab_alloc_node mm/slab.c:3327 [inline]
 kmem_cache_alloc_node+0x664/0x730 mm/slab.c:3647
 __alloc_skb+0xa7/0x580 net/core/skbuff.c:193
 alloc_skb_fclone include/linux/skbuff.h:1037 [inline]
 sk_stream_alloc_skb+0x9e/0x810 net/ipv4/tcp.c:874
 do_tcp_sendpages+0x772/0x1e10 net/ipv4/tcp.c:993
 tcp_sendpage_locked+0x63/0xa0 net/ipv4/tcp.c:1096
 tcp_sendpage+0x37/0x50 net/ipv4/tcp.c:1106
 inet_sendpage+0x122/0x600 net/ipv4/af_inet.c:815
 kernel_sendpage+0x60/0xd0 net/socket.c:3378
 sock_sendpage+0x6d/0xd0 net/socket.c:847
 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+0x4fd/0x12d0 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: 0033:0x459a29
Code: fd b7 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 cb b7 fb ff c3 66 2e 0f 1f 84 00 00 00 00
RSP: 002b:00007fd3c6d04c78 EFLAGS: 00000246 ORIG_RAX: 0000000000000113
RAX: ffffffffffffffda RBX: 00007fd3c6d04c90 RCX: 0000000000459a29
RDX: 0000000000000004 RSI: 0000000000000000 RDI: 0000000000000003
RBP: 000000000075bfc8 R08: 000000011d100000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 00007fd3c6d056d4
R13: 00000000004c9478 R14: 00000000004dfdd8 R15: 0000000000000005
CPU: 0 PID: 7160 Comm: syz-executor.2 Tainted: G      D           4.19.108-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
RAX: 0000000000000000 RBX: ffff8880978c06ec RCX: 000000000000401d
 __should_failslab+0xba/0xf0 mm/failslab.c:32
 should_failslab+0x9/0x14 mm/slab_common.c:1558
RDX: 0000000000000001 RSI: 0000000000000008 RDI: ffff8880978c06e0
 slab_pre_alloc_hook mm/slab.h:424 [inline]
 slab_alloc_node mm/slab.c:3304 [inline]
 kmem_cache_alloc_node_trace+0x26d/0x730 mm/slab.c:3666
 __do_kmalloc_node mm/slab.c:3688 [inline]
 __kmalloc_node_track_caller+0x3c/0x70 mm/slab.c:3703
 __kmalloc_reserve.isra.39+0x2c/0xc0 net/core/skbuff.c:137
 __alloc_skb+0xd7/0x580 net/core/skbuff.c:205
RBP: ffff88809484f4f8 R08: ffffed1012a1d804 R09: ffffed1012a1d800
R10: 0000000000000000 R11: ffff8880950ec01c R12: 0000000000001000
 alloc_skb_fclone include/linux/skbuff.h:1037 [inline]
 sk_stream_alloc_skb+0x9e/0x810 net/ipv4/tcp.c:874
 do_tcp_sendpages+0x772/0x1e10 net/ipv4/tcp.c:993
R13: 000000000000001d R14: ffff88809484f538 R15: dffffc0000000000
 tcp_sendpage_locked+0x63/0xa0 net/ipv4/tcp.c:1096
 tcp_sendpage+0x37/0x50 net/ipv4/tcp.c:1106
 inet_sendpage+0x122/0x600 net/ipv4/af_inet.c:815
 kernel_sendpage+0x60/0xd0 net/socket.c:3378
 sock_sendpage+0x6d/0xd0 net/socket.c:847
 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+0x4fd/0x12d0 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: 0033:0x459a29
Code: fd b7 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 cb b7 fb ff c3 66 2e 0f 1f 84 00 00 00 00
RSP: 002b:00007ff9926f4c78 EFLAGS: 00000246 ORIG_RAX: 0000000000000113
RAX: ffffffffffffffda RBX: 00007ff9926f4c90 RCX: 0000000000459a29
RDX: 0000000000000004 RSI: 0000000000000000 RDI: 0000000000000003
RBP: 000000000075bfc8 R08: 000000011d100000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 00007ff9926f56d4
R13: 00000000004c9478 R14: 00000000004dfdd8 R15: 0000000000000005
FAULT_INJECTION: forcing a failure.
name failslab, interval 1, probability 0, space 0, times 0
FS:  00007fc0d7f78700(0000) GS:ffff8880aeb00000(0000) knlGS:0000000000000000
CPU: 0 PID: 7163 Comm: syz-executor.4 Tainted: G      D           4.19.108-syzkaller #0
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
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
CR2: 0000000001dffb90 CR3: 0000000093a1e000 CR4: 00000000001406e0
 __should_failslab+0xba/0xf0 mm/failslab.c:32
 should_failslab+0x9/0x14 mm/slab_common.c:1558
 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
 kmalloc include/linux/slab.h:520 [inline]
 aead_request_alloc include/crypto/aead.h:425 [inline]
 tls_push_record+0xf3/0x1720 net/tls/tls_sw.c:209
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
 tls_sw_sendpage+0x458/0xc00 net/tls/tls_sw.c:585
 inet_sendpage+0x122/0x600 net/ipv4/af_inet.c:815
 kernel_sendpage+0x60/0xd0 net/socket.c:3378
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
 sock_sendpage+0x6d/0xd0 net/socket.c:847
 pipe_to_sendpage+0x212/0x430 fs/splice.c:452