Hello, syzbot found the following issue on: HEAD commit: 196145c606d0 Merge tag 'clk-fixes-for-linus' of git://git... git tree: upstream console output: https://syzkaller.appspot.com/x/log.txt?x=16f8549f980000 kernel config: https://syzkaller.appspot.com/x/.config?x=61d235cb8d15001c dashboard link: https://syzkaller.appspot.com/bug?extid=f4e0f821e3a3b7cee51d compiler: Debian clang version 15.0.6, GNU ld (GNU Binutils for Debian) 2.40 userspace arch: i386 Unfortunately, I don't have any reproducer for this issue yet. Downloadable assets: disk image: https://storage.googleapis.com/syzbot-assets/629d679a6d66/disk-196145c6.raw.xz vmlinux: https://storage.googleapis.com/syzbot-assets/aec0dd4a04f3/vmlinux-196145c6.xz kernel image: https://storage.googleapis.com/syzbot-assets/68e515733997/bzImage-196145c6.xz IMPORTANT: if you fix the issue, please add the following tag to the commit: Reported-by: syzbot+f4e0f821e3a3b7cee51d@xxxxxxxxxxxxxxxxxxxxxxxxx Oops: general protection fault, probably for non-canonical address 0xdffffc0000000000: 0000 [#1] PREEMPT SMP KASAN PTI KASAN: null-ptr-deref in range [0x0000000000000000-0x0000000000000007] CPU: 1 UID: 0 PID: 10078 Comm: syz.4.940 Not tainted 6.11.0-rc7-syzkaller-00097-g196145c606d0 #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 08/06/2024 RIP: 0010:sctp_inet_listen+0x7f0/0xa20 net/sctp/socket.c:8617 Code: 8d 98 00 06 00 00 48 89 d8 48 c1 e8 03 42 80 3c 28 00 74 08 48 89 df e8 6e 4e 05 f7 48 8b 1b 48 83 c3 02 48 89 d8 48 c1 e8 03 <42> 0f b6 04 28 84 c0 0f 85 8e 01 00 00 c6 03 01 31 db e9 d6 f9 ff RSP: 0018:ffffc90002eafd20 EFLAGS: 00010246 RAX: 0000000000000000 RBX: 0000000000000002 RCX: ffff88802e973c00 RDX: 0000000000000000 RSI: 0000000000000001 RDI: 0000000000000000 RBP: ffffc90002eafe78 R08: ffffffff8af5839c R09: 1ffffffff283c920 R10: dffffc0000000000 R11: fffffbfff283c921 R12: 1ffff1100fc7e242 R13: dffffc0000000000 R14: ffff88807e3f1212 R15: 1ffff1100fc7e2ff FS: 0000000000000000(0000) GS:ffff8880b8900000(0063) knlGS:00000000f5735b40 CS: 0010 DS: 002b ES: 002b CR0: 0000000080050033 CR2: 00007fadae30cff8 CR3: 0000000050d9a000 CR4: 00000000003506f0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 Call Trace: <TASK> __sys_listen_socket net/socket.c:1883 [inline] __sys_listen+0x1b7/0x230 net/socket.c:1894 __do_sys_listen net/socket.c:1902 [inline] __se_sys_listen net/socket.c:1900 [inline] __ia32_sys_listen+0x5a/0x70 net/socket.c:1900 do_syscall_32_irqs_on arch/x86/entry/common.c:165 [inline] __do_fast_syscall_32+0xb4/0x110 arch/x86/entry/common.c:386 do_fast_syscall_32+0x34/0x80 arch/x86/entry/common.c:411 entry_SYSENTER_compat_after_hwframe+0x84/0x8e RIP: 0023:0xf7fd6579 Code: b8 01 10 06 03 74 b4 01 10 07 03 74 b0 01 10 08 03 74 d8 01 00 00 00 00 00 00 00 00 00 00 00 00 00 51 52 55 89 e5 0f 34 cd 80 <5d> 5a 59 c3 90 90 90 90 90 90 90 90 90 90 90 90 90 90 90 90 90 90 RSP: 002b:00000000f573556c EFLAGS: 00000206 ORIG_RAX: 000000000000016b RAX: ffffffffffffffda RBX: 0000000000000003 RCX: 0000000000000000 RDX: 0000000000000000 RSI: 0000000000000000 RDI: 0000000000000000 RBP: 0000000000000000 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000206 R12: 0000000000000000 R13: 0000000000000000 R14: 0000000000000000 R15: 0000000000000000 </TASK> Modules linked in: ---[ end trace 0000000000000000 ]--- RIP: 0010:sctp_inet_listen+0x7f0/0xa20 net/sctp/socket.c:8617 Code: 8d 98 00 06 00 00 48 89 d8 48 c1 e8 03 42 80 3c 28 00 74 08 48 89 df e8 6e 4e 05 f7 48 8b 1b 48 83 c3 02 48 89 d8 48 c1 e8 03 <42> 0f b6 04 28 84 c0 0f 85 8e 01 00 00 c6 03 01 31 db e9 d6 f9 ff RSP: 0018:ffffc90002eafd20 EFLAGS: 00010246 RAX: 0000000000000000 RBX: 0000000000000002 RCX: ffff88802e973c00 RDX: 0000000000000000 RSI: 0000000000000001 RDI: 0000000000000000 RBP: ffffc90002eafe78 R08: ffffffff8af5839c R09: 1ffffffff283c920 R10: dffffc0000000000 R11: fffffbfff283c921 R12: 1ffff1100fc7e242 R13: dffffc0000000000 R14: ffff88807e3f1212 R15: 1ffff1100fc7e2ff FS: 0000000000000000(0000) GS:ffff8880b8900000(0063) knlGS:00000000f5735b40 CS: 0010 DS: 002b ES: 002b CR0: 0000000080050033 CR2: 000055f65cf85950 CR3: 0000000050d9a000 CR4: 00000000003506f0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 ---------------- Code disassembly (best guess): 0: 8d 98 00 06 00 00 lea 0x600(%rax),%ebx 6: 48 89 d8 mov %rbx,%rax 9: 48 c1 e8 03 shr $0x3,%rax d: 42 80 3c 28 00 cmpb $0x0,(%rax,%r13,1) 12: 74 08 je 0x1c 14: 48 89 df mov %rbx,%rdi 17: e8 6e 4e 05 f7 call 0xf7054e8a 1c: 48 8b 1b mov (%rbx),%rbx 1f: 48 83 c3 02 add $0x2,%rbx 23: 48 89 d8 mov %rbx,%rax 26: 48 c1 e8 03 shr $0x3,%rax * 2a: 42 0f b6 04 28 movzbl (%rax,%r13,1),%eax <-- trapping instruction 2f: 84 c0 test %al,%al 31: 0f 85 8e 01 00 00 jne 0x1c5 37: c6 03 01 movb $0x1,(%rbx) 3a: 31 db xor %ebx,%ebx 3c: e9 .byte 0xe9 3d: d6 (bad) 3e: f9 stc 3f: ff .byte 0xff --- This report is generated by a bot. It may contain errors. See https://goo.gl/tpsmEJ for more information about syzbot. syzbot engineers can be reached at syzkaller@xxxxxxxxxxxxxxxx. syzbot will keep track of this issue. See: https://goo.gl/tpsmEJ#status for how to communicate with syzbot. If the report is already addressed, let syzbot know by replying with: #syz fix: exact-commit-title If you want to overwrite report's subsystems, reply with: #syz set subsystems: new-subsystem (See the list of subsystem names on the web dashboard) If the report is a duplicate of another one, reply with: #syz dup: exact-subject-of-another-report If you want to undo deduplication, reply with: #syz undup
