bisecting fixing commit since aec3002d07fd2564cd32e56f126fa6db14a168bb building syzkaller on 7509bf360eba1461ac6059e4cacfbc29c9d2d4c7 testing commit aec3002d07fd2564cd32e56f126fa6db14a168bb with gcc (GCC) 8.4.1 20210217 kernel signature: 6eb8eeaedb68e9397b47190d3dd8befb619e9b9853f2fe717e8c30ae9c1c2ff6 all runs: crashed: general protection fault in gcmaes_crypt_by_sg testing current HEAD eb575cd5d7f60241d016fdd13a9e86d962093c9b testing commit eb575cd5d7f60241d016fdd13a9e86d962093c9b with gcc (GCC) 8.4.1 20210217 kernel signature: ac12294998abe9604f6089388fa66038edd2c8c248b4f7f50a46638860f00be9 all runs: crashed: general protection fault in gcmaes_crypt_by_sg revisions tested: 2, total time: 21m28.868386964s (build: 14m46.557322287s, test: 6m16.946787444s) the crash still happens on HEAD commit msg: Linux 4.19.195 crash: general protection fault in gcmaes_crypt_by_sg R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000005 R13: 00000000004f8130 R14: 00000000004b4b1b R15: 00007fe65bd096bc 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: 6892 Comm: syz-executor.3 Not tainted 4.19.195-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 1a be 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:ffff8881c765f2f0 EFLAGS: 00010202 RAX: 0000000000000001 RBX: 0000000000000034 RCX: 0000000000000000 RDX: 1ffff1103dc5ec64 RSI: ffff8881ee2f632c RDI: 0000000000000008 RBP: ffff8881c765f620 R08: 0000000000000007 R09: 000000000000000d R10: ffff8881d5cbf020 R11: 0000000000000010 R12: 0000000000000000 R13: ffff8881ee2f6118 R14: dffffc0000000000 R15: 0000000000000007 FS: 00007f331b623700(0000) GS:ffff8881f6800000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 000000000052c000 CR3: 00000001ea40e001 CR4: 00000000001606f0 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: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: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:00007f331b6231a8 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: 00007f331b6236bc Modules linked in: ---[ end trace cc05c74810090c76 ]--- 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 1a be 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:ffff8881c765f2f0 EFLAGS: 00010202 RAX: 0000000000000001 RBX: 0000000000000034 RCX: 0000000000000000 RDX: 1ffff1103dc5ec64 RSI: ffff8881ee2f632c RDI: 0000000000000008 FAULT_INJECTION: forcing a failure. name failslab, interval 1, probability 0, space 0, times 0 RBP: ffff8881c765f620 R08: 0000000000000007 R09: 000000000000000d R10: ffff8881d5cbf020 R11: 0000000000000010 R12: 0000000000000000 R13: ffff8881ee2f6118 R14: dffffc0000000000 R15: 0000000000000007 CPU: 1 PID: 6885 Comm: syz-executor.1 Tainted: G D 4.19.195-syzkaller #0 FS: 00007f331b623700(0000) GS:ffff8881f6800000(0000) knlGS:0000000000000000 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 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 000000000052c000 CR3: 00000001ea40e001 CR4: 00000000001606f0 __should_failslab+0xba/0xf0 mm/failslab.c:32 should_failslab+0x9/0x20 mm/slab_common.c:1588 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 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 __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 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400