general protection fault, probably for non-canonical address 0xdffffc0000000004: 0000 [#1] PREEMPT SMP KASAN KASAN: null-ptr-deref in range [0x0000000000000020-0x0000000000000027] CPU: 0 PID: 14324 Comm: syz-executor.4 Not tainted 6.4.0-rc5-syzkaller-01107-ge431e712c836 #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 05/25/2023 RIP: 0010:crypto_shash_alg include/crypto/hash.h:827 [inline] RIP: 0010:crypto_shash_final crypto/shash.c:171 [inline] RIP: 0010:shash_async_final+0x6d/0x150 crypto/shash.c:319 Code: 4c 89 e2 48 c1 ea 03 80 3c 02 00 0f 85 d5 00 00 00 48 b8 00 00 00 00 00 fc ff df 48 8b 5b 50 48 8d 7b 20 48 89 fa 48 c1 ea 03 <80> 3c 02 00 0f 85 a8 00 00 00 48 b8 00 00 00 00 00 fc ff df 48 8b RSP: 0018:ffffc90016567928 EFLAGS: 00010202 RAX: dffffc0000000000 RBX: 0000000000000000 RCX: ffffc9000c1dc000 RDX: 0000000000000004 RSI: ffffffff83df3b32 RDI: 0000000000000020 RBP: ffff888028f1d000 R08: 0000000000000007 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000094001 R12: ffff88801628faf8 R13: ffff888028f1d000 R14: ffff888099d00000 R15: ffff88801628fa38 FS: 00007f01dabfe700(0000) GS:ffff8880b9800000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 00007efcf0be9ff8 CR3: 000000008ff8a000 CR4: 00000000003506f0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 Call Trace: crypto_ahash_op crypto/ahash.c:303 [inline] crypto_ahash_op crypto/ahash.c:292 [inline] crypto_ahash_final+0xed/0x1e0 crypto/ahash.c:316 hash_recvmsg+0x2c6/0xa80 crypto/algif_hash.c:248 sock_recvmsg_nosec net/socket.c:1019 [inline] sock_recvmsg+0xe2/0x160 net/socket.c:1040 ____sys_recvmsg+0x210/0x5a0 net/socket.c:2712 ___sys_recvmsg+0xf2/0x180 net/socket.c:2754 do_recvmmsg+0x25e/0x6f0 net/socket.c:2848 __sys_recvmmsg net/socket.c:2927 [inline] __do_sys_recvmmsg net/socket.c:2950 [inline] __se_sys_recvmmsg net/socket.c:2943 [inline] __x64_sys_recvmmsg+0x20f/0x260 net/socket.c:2943 do_syscall_x64 arch/x86/entry/common.c:50 [inline] do_syscall_64+0x39/0xb0 arch/x86/entry/common.c:80 entry_SYSCALL_64_after_hwframe+0x63/0xcd RIP: 0033:0x7f01dc08c169 Code: 28 00 00 00 75 05 48 83 c4 28 c3 e8 f1 19 00 00 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 73 01 c3 48 c7 c1 b8 ff ff ff f7 d8 64 89 01 48 RSP: 002b:00007f01dabfe168 EFLAGS: 00000246 ORIG_RAX: 000000000000012b RAX: ffffffffffffffda RBX: 00007f01dc1abf80 RCX: 00007f01dc08c169 RDX: 0000000000000002 RSI: 0000000020000840 RDI: 0000000000000004 RBP: 00007f01dc0e7ca1 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000 R13: 00007fff42380baf R14: 00007f01dabfe300 R15: 0000000000022000 Modules linked in: ---[ end trace 0000000000000000 ]--- RIP: 0010:crypto_shash_alg include/crypto/hash.h:827 [inline] RIP: 0010:crypto_shash_final crypto/shash.c:171 [inline] RIP: 0010:shash_async_final+0x6d/0x150 crypto/shash.c:319 Code: 4c 89 e2 48 c1 ea 03 80 3c 02 00 0f 85 d5 00 00 00 48 b8 00 00 00 00 00 fc ff df 48 8b 5b 50 48 8d 7b 20 48 89 fa 48 c1 ea 03 <80> 3c 02 00 0f 85 a8 00 00 00 48 b8 00 00 00 00 00 fc ff df 48 8b RSP: 0018:ffffc90016567928 EFLAGS: 00010202 RAX: dffffc0000000000 RBX: 0000000000000000 RCX: ffffc9000c1dc000 RDX: 0000000000000004 RSI: ffffffff83df3b32 RDI: 0000000000000020 RBP: ffff888028f1d000 R08: 0000000000000007 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000094001 R12: ffff88801628faf8 R13: ffff888028f1d000 R14: ffff888099d00000 R15: ffff88801628fa38 FS: 00007f01dabfe700(0000) GS:ffff8880b9900000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 0000000000000000 CR3: 000000008ff8a000 CR4: 00000000003506e0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 ---------------- Code disassembly (best guess): 0: 4c 89 e2 mov %r12,%rdx 3: 48 c1 ea 03 shr $0x3,%rdx 7: 80 3c 02 00 cmpb $0x0,(%rdx,%rax,1) b: 0f 85 d5 00 00 00 jne 0xe6 11: 48 b8 00 00 00 00 00 movabs $0xdffffc0000000000,%rax 18: fc ff df 1b: 48 8b 5b 50 mov 0x50(%rbx),%rbx 1f: 48 8d 7b 20 lea 0x20(%rbx),%rdi 23: 48 89 fa mov %rdi,%rdx 26: 48 c1 ea 03 shr $0x3,%rdx * 2a: 80 3c 02 00 cmpb $0x0,(%rdx,%rax,1) <-- trapping instruction 2e: 0f 85 a8 00 00 00 jne 0xdc 34: 48 b8 00 00 00 00 00 movabs $0xdffffc0000000000,%rax 3b: fc ff df 3e: 48 rex.W 3f: 8b .byte 0x8b