bisecting fixing commit since aec3002d07fd2564cd32e56f126fa6db14a168bb
building syzkaller on 7509bf360eba1461ac6059e4cacfbc29c9d2d4c7
testing commit aec3002d07fd2564cd32e56f126fa6db14a168bb with gcc (GCC) 8.4.1 20210217
kernel signature: 6eb8eeaedb68e9397b47190d3dd8befb619e9b9853f2fe717e8c30ae9c1c2ff6
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 gcmaes_crypt_by_sg
run #9: crashed: general protection fault in gcmaes_crypt_by_sg
run #10: crashed: general protection fault in gcmaes_crypt_by_sg
run #11: crashed: general protection fault in gcmaes_crypt_by_sg
run #12: crashed: general protection fault in gcmaes_crypt_by_sg
run #13: crashed: general protection fault in gcmaes_crypt_by_sg
run #14: crashed: general protection fault in corrupted
run #15: crashed: general protection fault in gcmaes_crypt_by_sg
run #16: crashed: general protection fault in gcmaes_crypt_by_sg
run #17: crashed: general protection fault in gcmaes_crypt_by_sg
run #18: crashed: general protection fault in gcmaes_crypt_by_sg
run #19: crashed: general protection fault in gcmaes_crypt_by_sg
testing current HEAD 255b58a2b3af0baa0ee11507390349217b8b73b0
testing commit 255b58a2b3af0baa0ee11507390349217b8b73b0 with gcc (GCC) 8.4.1 20210217
kernel signature: d3e382575511e1b60dc33f2c2b92e36ac3723b4a9dfb18dfecdab7fe87a2509f
all runs: crashed: general protection fault in gcmaes_crypt_by_sg
revisions tested: 2, total time: 22m28.3704894s (build: 15m20.133224652s, test: 6m9.675618769s)
the crash still happens on HEAD
commit msg: Linux 4.19.176
crash: general protection fault in gcmaes_crypt_by_sg
RBP: 0000000000000001 R08: 0000000100000300 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000005
R13: 00000000004f8130 R14: 00000000004b4b1b R15: 00007fd171edd6bc
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: 1 PID: 6598 Comm: syz-executor.1 Not tainted 4.19.176-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+0xf72/0x1490 arch/x86/crypto/aesni-intel_glue.c:868
Code: 2b 05 00 00 41 8b 45 08 89 84 24 90 00 00 00 e9 f2 f7 ff ff 4c 89 e7 e8 ac d9 bc 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 ea 04 00 00 41 8b 44 24 08
RSP: 0018:ffff8881e2ecf2f0 EFLAGS: 00010202
RAX: 0000000000000001 RBX: 0000000000000034 RCX: 0000000000000000
RDX: 1ffff1103a3a38c4 RSI: ffff8881d1d1c62c RDI: 0000000000000008
RBP: ffff8881e2ecf620 R08: 0000000000000007 R09: 000000000000000d
R10: ffff8881e3cf5020 R11: 0000000000000010 R12: 0000000000000000
R13: ffff8881d1d1c418 R14: dffffc0000000000 R15: 0000000000000007
FS:  00007f22acdda700(0000) GS:ffff8881f6900000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007fd171edcf98 CR3: 00000001e2ec1001 CR4: 00000000001606e0
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+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: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+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: 0033:0x460c99
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:00007f22acdda1a8 EFLAGS: 00000246 ORIG_RAX: 0000000000000113
RAX: ffffffffffffffda RBX: 000000000052bf00 RCX: 0000000000460c99
RDX: 0000000000000004 RSI: 0000000000000000 RDI: 0000000000000003
RBP: 0000000000000001 R08: 0000000100000300 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000005
R13: 00000000004f8130 R14: 00000000004b4b1b R15: 00007f22acdda6bc
Modules linked in:
---[ end trace f5e6caf0013e274c ]---
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+0xf72/0x1490 arch/x86/crypto/aesni-intel_glue.c:868
Code: 2b 05 00 00 41 8b 45 08 89 84 24 90 00 00 00 e9 f2 f7 ff ff 4c 89 e7 e8 ac d9 bc 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 ea 04 00 00 41 8b 44 24 08
RSP: 0018:ffff8881e2ecf2f0 EFLAGS: 00010202
RAX: 0000000000000001 RBX: 0000000000000034 RCX: 0000000000000000
RDX: 1ffff1103a3a38c4 RSI: ffff8881d1d1c62c RDI: 0000000000000008
RBP: ffff8881e2ecf620 R08: 0000000000000007 R09: 000000000000000d
R10: ffff8881e3cf5020 R11: 0000000000000010 R12: 0000000000000000
R13: ffff8881d1d1c418 R14: dffffc0000000000 R15: 0000000000000007
FS:  00007f22acdda700(0000) GS:ffff8881f6900000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007fd171edcf98 CR3: 00000001e2ec1001 CR4: 00000000001606e0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400