On Sun, May 14, 2023 at 08:09:50PM -0700, syzbot wrote: > syzbot has found a reproducer for the following issue on: > > HEAD commit: 31f4104e392a Merge tag 'locking_urgent_for_v6.4_rc2' of gi.. > git tree: upstream > console output: https://syzkaller.appspot.com/x/log.txt?x=11768616280000 > kernel config: https://syzkaller.appspot.com/x/.config?x=8bc832f563d8bf38 > dashboard link: https://syzkaller.appspot.com/bug?extid=a6abcf08bad8b18fd198 > compiler: gcc (Debian 10.2.1-6) 10.2.1 20210110, GNU ld (GNU Binutils for Debian) 2.35.2 > userspace arch: i386 > syz repro: https://syzkaller.appspot.com/x/repro.syz?x=1737e3be280000 > C reproducer: https://syzkaller.appspot.com/x/repro.c?x=149d4c06280000 ... > ---------------- > Code disassembly (best guess): > 0: d0 10 rclb (%rax) > 2: c4 e2 69 00 d7 vpshufb %xmm7,%xmm2,%xmm2 > 7: c5 11 ef ea vpxor %xmm2,%xmm13,%xmm13 > b: c5 e9 72 d0 08 vpsrld $0x8,%xmm0,%xmm2 > 10: c4 e2 69 00 d7 vpshufb %xmm7,%xmm2,%xmm2 > 15: c5 09 ef f2 vpxor %xmm2,%xmm14,%xmm14 > 19: c4 e2 79 00 d7 vpshufb %xmm7,%xmm0,%xmm2 > 1e: c5 01 ef fa vpxor %xmm2,%xmm15,%xmm15 > 22: c5 f9 6f 05 7a 15 c9 vmovdqa 0xac9157a(%rip),%xmm0 # 0xac915a4 > 29: 0a > * 2a: c5 f9 6f 0d 6a 15 c9 vmovdqa 0xac9156a(%rip),%xmm1 # 0xac9159c <-- trapping instruction > 31: 0a > 32: c5 f9 6f 15 7a 15 c9 vmovdqa 0xac9157a(%rip),%xmm2 # 0xac915b4 > 39: 0a > 3a: c5 .byte 0xc5 > 3b: f9 stc > 3c: 6f outsl %ds:(%rsi),(%dx) > 3d: 1d .byte 0x1d > 3e: 52 push %rdx > 3f: 15 .byte 0x15 Ard, this looks like something that you recently touched. Any ideas what might be causing this? Thanks, -- Email: Herbert Xu <herbert@xxxxxxxxxxxxxxxxxxx> Home Page: http://gondor.apana.org.au/~herbert/ PGP Key: http://gondor.apana.org.au/~herbert/pubkey.txt
