bisecting fixing commit since 9f31eb60d7a23536bf3902d4dc602f10c822b79e
building syzkaller on 34bf9440bd06034f86b5d9ac8afbf078129cbdae
testing commit 9f31eb60d7a23536bf3902d4dc602f10c822b79e with gcc (GCC) 8.1.0
kernel signature: 5100ace6ac47be171a7b6aff3dbf764f7bb506e5c9fb49d4f2ecbe29c761d4cf
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: KASAN: slab-out-of-bounds Read in scatterwalk_copychunks
run #6: crashed: KASAN: slab-out-of-bounds Read in scatterwalk_copychunks
run #7: crashed: general protection fault in corrupted
run #8: crashed: KASAN: slab-out-of-bounds Read in scatterwalk_copychunks
run #9: crashed: general protection fault in scatterwalk_copychunks
testing current HEAD 13d2ce42de8cb98ff952f8de6307f896203854c2
testing commit 13d2ce42de8cb98ff952f8de6307f896203854c2 with gcc (GCC) 8.1.0
kernel signature: 6e9b7dc160953a36aef3200b829cdb0ecdd9d8af58b0617200832000e9cbbcaf
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: slab-out-of-bounds Read in scatterwalk_copychunks
run #4: crashed: general protection fault in scatterwalk_copychunks
run #5: crashed: KASAN: slab-out-of-bounds Read 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
revisions tested: 2, total time: 24m49.163361245s (build: 18m25.449673744s, test: 5m21.831114476s)
the crash still happens on HEAD
commit msg: Linux 4.19.163
crash: general protection fault in scatterwalk_copychunks
R13: 00000000004c887b R14: 00000000004de6b0 R15: 0000000000000005
IPv6: ADDRCONF(NETDEV_CHANGE): hsr0: link becomes ready
kasan: CONFIG_KASAN_INLINE enabled
kasan: GPF could be caused by NULL-ptr deref or user memory access
general protection fault: 0000 [#1] PREEMPT SMP KASAN
IPv6: ADDRCONF(NETDEV_UP): vxcan1: link is not ready
CPU: 1 PID: 6593 Comm: syz-executor.0 Not tainted 4.19.163-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 a7 a5 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:ffff8881e9ae7498 EFLAGS: 00010202
8021q: adding VLAN 0 to HW filter on device batadv0
RAX: 0000000000000000 RBX: ffff8881e2cb468c RCX: 000000000000401e
RDX: 0000000000000001 RSI: 0000000000000008 RDI: ffff8881e2cb4680
RBP: ffff8881e9ae74f8 R08: ffffed103c1d6804 R09: ffffed103c1d6800
R10: 0000000000000000 R11: ffff8881e0eb401d R12: 0000000000000fff
R13: 000000000000001e R14: ffff8881e9ae7538 R15: dffffc0000000000
FS:  00007f400bfe3700(0000) GS:ffff8881f6900000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007ff923088810 CR3: 00000001e2998004 CR4: 00000000001606e0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Call Trace:
 scatterwalk_map_and_copy+0x128/0x190 crypto/scatterwalk.c:72
 gcmaes_encrypt.constprop.15+0x81b/0xda0 arch/x86/crypto/aesni-intel_glue.c:980
 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+0x9ae/0x1600 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: 0033:0x459349
Code: 7d 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 4b b7 fb ff c3 66 2e 0f 1f 84 00 00 00 00
RSP: 002b:00007f400bfe2c78 EFLAGS: 00000246 ORIG_RAX: 0000000000000113
RAX: ffffffffffffffda RBX: 00007f400bfe2c90 RCX: 0000000000459349
RDX: 0000000000000004 RSI: 0000000000000000 RDI: 0000000000000003
RBP: 000000000075bf20 R08: 0000000100000300 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 00007f400bfe36d4
R13: 00000000004c887b R14: 00000000004de6b0 R15: 0000000000000005
Modules linked in:
FAULT_INJECTION: forcing a failure.
name fail_page_alloc, interval 1, probability 0, space 0, times 0
---[ end trace 7c7f6cbee56c4e2b ]---
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 a7 a5 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:ffff8881e9ae7498 EFLAGS: 00010202
RAX: 0000000000000000 RBX: ffff8881e2cb468c RCX: 000000000000401e
RDX: 0000000000000001 RSI: 0000000000000008 RDI: ffff8881e2cb4680
RBP: ffff8881e9ae74f8 R08: ffffed103c1d6804 R09: ffffed103c1d6800
R10: 0000000000000000 R11: ffff8881e0eb401d R12: 0000000000000fff
R13: 000000000000001e R14: ffff8881e9ae7538 R15: dffffc0000000000
FS:  00007f400bfe3700(0000) GS:ffff8881f6900000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007f746cd25620 CR3: 00000001e2998005 CR4: 00000000001606e0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400