Hello, syzbot found the following issue on:
HEAD commit: 0434dbe32053 Merge tag 'linux_kselftest-next-6.11-rc1' of .. git tree: upstream console+strace: https://syzkaller.appspot.com/x/log.txt?x=16061f4e980000 kernel config: https://syzkaller.appspot.com/x/.config?x=4b8bd5292e033239 dashboard link: https://syzkaller.appspot.com/bug?extid=dd3d9835055dacb66f35 compiler: Debian clang version 15.0.6, GNU ld (GNU Binutils for Debian) 2.40 syz repro: https://syzkaller.appspot.com/x/repro.syz?x=10d9ccb5980000 C reproducer: https://syzkaller.appspot.com/x/repro.c?x=12633a79980000 Downloadable assets: disk image: https://storage.googleapis.com/syzbot-assets/3766752b5090/disk-0434dbe3.raw.xz vmlinux: https://storage.googleapis.com/syzbot-assets/e3608abc3f91/vmlinux-0434dbe3.xz kernel image: https://storage.googleapis.com/syzbot-assets/c133560ad498/bzImage-0434dbe3.xz mounted in repro: https://storage.googleapis.com/syzbot-assets/ff0cf9ecbd00/mount_0.gz IMPORTANT: if you fix the issue, please add the following tag to the commit: Reported-by: [email protected] loop0: detected capacity change from 0 to 32768 Oops: general protection fault, probably for non-canonical address 0xdffffc000000900d: 0000 [#1] PREEMPT SMP KASAN PTI KASAN: probably user-memory-access in range [0x0000000000048068-0x000000000004806f] CPU: 0 PID: 5080 Comm: syz-executor457 Not tainted 6.10.0-syzkaller-02711-g0434dbe32053 #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 06/07/2024 RIP: 0010:gen_poly_key fs/bcachefs/checksum.c:191 [inline] RIP: 0010:bch2_checksum+0x1c5/0x770 fs/bcachefs/checksum.c:227 Code: f6 e8 3f c5 dc fd 48 8b 44 24 28 4c 8d b0 68 80 04 00 ba 20 00 00 00 48 8d 7c 24 60 31 f6 e8 22 c5 dc fd 4c 89 f0 48 c1 e8 03 <42> 80 3c 28 00 74 08 4c 89 f7 e8 3c c2 dc fd 49 8b 3e 48 b8 00 00 RSP: 0018:ffffc90003536d40 EFLAGS: 00010202 RAX: 000000000000900d RBX: 0000000000000000 RCX: 0000000000000000 RDX: 0000000000000000 RSI: 0000000000000000 RDI: ffffc90003536dc0 RBP: ffffc900035370b0 R08: ffffc90003536dbf R09: 0000000000000000 R10: ffffc90003536da0 R11: fffff520006a6db8 R12: ffffc90003536de0 R13: dffffc0000000000 R14: 0000000000048068 R15: 1ffff920006a6db0 FS: 000055558465b380(0000) GS:ffff8880b9400000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 00005568164b48e0 CR3: 0000000020ce4000 CR4: 00000000003506f0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 Call Trace: <TASK> read_one_super+0xd87/0xf40 fs/bcachefs/super-io.c:673 __bch2_read_super+0x873/0x1370 fs/bcachefs/super-io.c:751 bch2_fs_open+0x246/0xdf0 fs/bcachefs/super.c:2082 bch2_mount+0x6b0/0x13c0 fs/bcachefs/fs.c:1931 legacy_get_tree+0xee/0x190 fs/fs_context.c:662 vfs_get_tree+0x90/0x2a0 fs/super.c:1789 do_new_mount+0x2be/0xb40 fs/namespace.c:3472 do_mount fs/namespace.c:3812 [inline] __do_sys_mount fs/namespace.c:4020 [inline] __se_sys_mount+0x2d6/0x3c0 fs/namespace.c:3997 do_syscall_x64 arch/x86/entry/common.c:52 [inline] do_syscall_64+0xf3/0x230 arch/x86/entry/common.c:83 entry_SYSCALL_64_after_hwframe+0x77/0x7f RIP: 0033:0x7feb9e3d106a Code: d8 64 89 02 48 c7 c0 ff ff ff ff eb a6 e8 5e 04 00 00 66 2e 0f 1f 84 00 00 00 00 00 0f 1f 40 00 49 89 ca b8 a5 00 00 00 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:00007ffd63a40f78 EFLAGS: 00000282 ORIG_RAX: 00000000000000a5 RAX: ffffffffffffffda RBX: 00007ffd63a40f90 RCX: 00007feb9e3d106a RDX: 0000000020005b00 RSI: 0000000020000040 RDI: 00007ffd63a40f90 RBP: 0000000000000004 R08: 00007ffd63a40fd0 R09: 0000000000005b4e R10: 0000000000000000 R11: 0000000000000282 R12: 0000000000000000 R13: 00007ffd63a40fd0 R14: 0000000000000003 R15: 0000000001000000 </TASK> Modules linked in: ---[ end trace 0000000000000000 ]--- RIP: 0010:gen_poly_key fs/bcachefs/checksum.c:191 [inline] RIP: 0010:bch2_checksum+0x1c5/0x770 fs/bcachefs/checksum.c:227 Code: f6 e8 3f c5 dc fd 48 8b 44 24 28 4c 8d b0 68 80 04 00 ba 20 00 00 00 48 8d 7c 24 60 31 f6 e8 22 c5 dc fd 4c 89 f0 48 c1 e8 03 <42> 80 3c 28 00 74 08 4c 89 f7 e8 3c c2 dc fd 49 8b 3e 48 b8 00 00 RSP: 0018:ffffc90003536d40 EFLAGS: 00010202 RAX: 000000000000900d RBX: 0000000000000000 RCX: 0000000000000000 RDX: 0000000000000000 RSI: 0000000000000000 RDI: ffffc90003536dc0 RBP: ffffc900035370b0 R08: ffffc90003536dbf R09: 0000000000000000 R10: ffffc90003536da0 R11: fffff520006a6db8 R12: ffffc90003536de0 R13: dffffc0000000000 R14: 0000000000048068 R15: 1ffff920006a6db0 FS: 000055558465b380(0000) GS:ffff8880b9500000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 00005568163d0fb0 CR3: 0000000020ce4000 CR4: 00000000003506f0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 ---------------- Code disassembly (best guess), 1 bytes skipped: 0: e8 3f c5 dc fd call 0xfddcc544 5: 48 8b 44 24 28 mov 0x28(%rsp),%rax a: 4c 8d b0 68 80 04 00 lea 0x48068(%rax),%r14 11: ba 20 00 00 00 mov $0x20,%edx 16: 48 8d 7c 24 60 lea 0x60(%rsp),%rdi 1b: 31 f6 xor %esi,%esi 1d: e8 22 c5 dc fd call 0xfddcc544 22: 4c 89 f0 mov %r14,%rax 25: 48 c1 e8 03 shr $0x3,%rax * 29: 42 80 3c 28 00 cmpb $0x0,(%rax,%r13,1) <-- trapping instruction 2e: 74 08 je 0x38 30: 4c 89 f7 mov %r14,%rdi 33: e8 3c c2 dc fd call 0xfddcc274 38: 49 8b 3e mov (%r14),%rdi 3b: 48 rex.W 3c: b8 .byte 0xb8 --- 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 [email protected]. 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 syzbot to run the reproducer, reply with: #syz test: git://repo/address.git branch-or-commit-hash If you attach or paste a git patch, syzbot will apply it before testing. 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
