bisecting fixing commit since aec3002d07fd2564cd32e56f126fa6db14a168bb
building syzkaller on 7509bf360eba1461ac6059e4cacfbc29c9d2d4c7
testing commit aec3002d07fd2564cd32e56f126fa6db14a168bb with gcc (GCC) 8.1.0
kernel signature: 62aea23aafd896e6116e5b466ec1cb74df7692c609e542a834b6deac138ec9cd
run #0: crashed: general protection fault in gcmaes_crypt_by_sg
run #1: crashed: general protection fault in gcmaes_crypt_by_sg
run #2: crashed: general protection fault in gcmaes_crypt_by_sg
run #3: crashed: general protection fault in gcmaes_crypt_by_sg
run #4: crashed: general protection fault in gcmaes_crypt_by_sg
run #5: crashed: general protection fault in gcmaes_crypt_by_sg
run #6: crashed: general protection fault in gcmaes_crypt_by_sg
run #7: crashed: general protection fault in gcmaes_crypt_by_sg
run #8: crashed: general protection fault in corrupted
run #9: crashed: general protection fault in gcmaes_crypt_by_sg
testing current HEAD 7edd66cf61670d2d0c31f89cb3a247016e489a8a
testing commit 7edd66cf61670d2d0c31f89cb3a247016e489a8a with gcc (GCC) 8.1.0
kernel signature: 73444d322447a49a7d0ce827f0bb065d7943605c70c3fce5c8e9a20d12712745
all runs: crashed: general protection fault in gcmaes_crypt_by_sg
revisions tested: 2, total time: 25m16.062837481s (build: 17m40.342335237s, test: 6m25.532617196s)
the crash still happens on HEAD
commit msg: Linux 4.19.118
crash: general protection fault in gcmaes_crypt_by_sg
RBP: 000000000075bf20 R08: 0000000100000300 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 00007f6554f0f6d4
R13: 00000000004c8a66 R14: 00000000004deb70 R15: 0000000000000005
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
CPU: 0 PID: 7180 Comm: syz-executor.0 Not tainted 4.19.118-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_done include/crypto/scatterwalk.h:106 [inline]
RIP: 0010:gcmaes_crypt_by_sg.constprop.16+0xf8b/0x14c0 arch/x86/crypto/aesni-intel_glue.c:868
Code: 85 c9 89 84 24 90 00 00 00 0f 85 de f7 ff ff e9 3d f8 ff ff 4c 89 e7 e8 13 e2 bf 01 48 8d 78 08 49 89 c4 48 89 f8 48 c1 e8 03 <42> 0f b6 04 30 84 c0 74 08 3c 03 0f 8e fb 04 00 00 41 8b 44 24 08
RSP: 0018:ffff88809806f2f0 EFLAGS: 00010202
RAX: 0000000000000001 RBX: 0000000000000034 RCX: 0000000000000007
RDX: 1ffff110136e6d04 RSI: ffff88809b73682c RDI: 0000000000000008
RBP: ffff88809806f620 R08: 0000000000000007 R09: 000000000000000d
R10: ffff88808622d020 R11: 0000000000000010 R12: 0000000000000000
R13: ffff88809b736618 R14: dffffc0000000000 R15: 0000000000000007
FS:  00007fe6b5c2e700(0000) GS:ffff8880aea00000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00000000007580a0 CR3: 0000000086620000 CR4: 00000000001406f0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Call Trace:
 gcmaes_encrypt.constprop.15+0x59f/0xda0 arch/x86/crypto/aesni-intel_glue.c:932
 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: 0033:0x459519
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:00007fe6b5c2dc78 EFLAGS: 00000246 ORIG_RAX: 0000000000000113
RAX: ffffffffffffffda RBX: 00007fe6b5c2dc90 RCX: 0000000000459519
RDX: 0000000000000004 RSI: 0000000000000000 RDI: 0000000000000003
RBP: 000000000075bf20 R08: 0000000100000300 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 00007fe6b5c2e6d4
R13: 00000000004c8a66 R14: 00000000004deb70 R15: 0000000000000005
Modules linked in:
---[ end trace e7f6acb0063140b0 ]---
RIP: 0010:scatterwalk_start include/crypto/scatterwalk.h:73 [inline]
RIP: 0010:scatterwalk_pagedone include/crypto/scatterwalk.h:98 [inline]
RIP: 0010:scatterwalk_done include/crypto/scatterwalk.h:106 [inline]
RIP: 0010:gcmaes_crypt_by_sg.constprop.16+0xf8b/0x14c0 arch/x86/crypto/aesni-intel_glue.c:868
Code: 85 c9 89 84 24 90 00 00 00 0f 85 de f7 ff ff e9 3d f8 ff ff 4c 89 e7 e8 13 e2 bf 01 48 8d 78 08 49 89 c4 48 89 f8 48 c1 e8 03 <42> 0f b6 04 30 84 c0 74 08 3c 03 0f 8e fb 04 00 00 41 8b 44 24 08
RSP: 0018:ffff88809806f2f0 EFLAGS: 00010202
RAX: 0000000000000001 RBX: 0000000000000034 RCX: 0000000000000007
RDX: 1ffff110136e6d04 RSI: ffff88809b73682c RDI: 0000000000000008
RBP: ffff88809806f620 R08: 0000000000000007 R09: 000000000000000d
R10: ffff88808622d020 R11: 0000000000000010 R12: 0000000000000000
R13: ffff88809b736618 R14: dffffc0000000000 R15: 0000000000000007
FS:  00007fe6b5c2e700(0000) GS:ffff8880aea00000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00000000007580a0 CR3: 0000000086620000 CR4: 00000000001406f0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400