Hello, syzbot found the following issue on:
HEAD commit: ddddf9d64f73 Merge tag 'perf-core-2025-05-25' of git://git.. git tree: upstream console output: https://syzkaller.appspot.com/x/log.txt?x=11bebdf4580000 kernel config: https://syzkaller.appspot.com/x/.config?x=fd18a1001092f95b dashboard link: https://syzkaller.appspot.com/bug?extid=d78b3c996e2381acd902 compiler: Debian clang version 20.1.6 (++20250514063057+1e4d39e07757-1~exp1~20250514183223.118), Debian LLD 20.1.6 syz repro: https://syzkaller.appspot.com/x/repro.syz?x=140426d4580000 C reproducer: https://syzkaller.appspot.com/x/repro.c?x=16baadf4580000 Downloadable assets: disk image (non-bootable): https://storage.googleapis.com/syzbot-assets/d900f083ada3/non_bootable_disk-ddddf9d6.raw.xz vmlinux: https://storage.googleapis.com/syzbot-assets/bc551d1d4e46/vmlinux-ddddf9d6.xz kernel image: https://storage.googleapis.com/syzbot-assets/d26a6de23b0e/bzImage-ddddf9d6.xz mounted in repro: https://storage.googleapis.com/syzbot-assets/b7eba007e6cf/mount_0.gz IMPORTANT: if you fix the issue, please add the following tag to the commit: Reported-by: [email protected] ------------[ cut here ]------------ kernel BUG at fs/bcachefs/bkey.c:272! Oops: invalid opcode: 0000 [#1] SMP KASAN NOPTI CPU: 0 UID: 0 PID: 5306 Comm: read_btree_node Not tainted 6.15.0-syzkaller-01599-gddddf9d64f73 #0 PREEMPT(full) Hardware name: QEMU Standard PC (Q35 + ICH9, 2009), BIOS 1.16.3-debian-1.16.3-2~bpo12+1 04/01/2014 RIP: 0010:__bch2_bkey_unpack_key+0xdeb/0xe10 fs/bcachefs/bkey.c:272 Code: b2 da 00 e9 f3 f9 ff ff e8 a2 10 aa fd 48 c7 c7 a0 7b 55 8e 48 89 ee 4c 89 f2 e8 20 b2 da 00 e9 2e fb ff ff e8 86 10 aa fd 90 <0f> 0b e8 7e 10 aa fd 90 0f 0b e8 76 10 aa fd 90 0f 0b e8 6e 10 aa RSP: 0018:ffffc9000d3e6ab8 EFLAGS: 00010293 RAX: ffffffff841519da RBX: 0000000000000003 RCX: ffff888000ad8000 RDX: 0000000000000000 RSI: 0000000000000005 RDI: 0000000000000006 RBP: 0000000000000005 R08: ffffc9000d3e6d4f R09: 0000000000000000 R10: ffffc9000d3e6d30 R11: fffff52001a7cdaa R12: ffffc9000d3e6d30 R13: ffff888046dc1028 R14: ffff88803ee140c1 R15: dffffc0000000000 FS: 0000000000000000(0000) GS:ffff88808d6b1000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 000055ce47cf57d0 CR3: 0000000011f33000 CR4: 0000000000352ef0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 Call Trace: <TASK> __bch2_bkey_compat+0x4db/0xbd0 fs/bcachefs/bkey_methods.c:480 bch2_bkey_compat fs/bcachefs/bkey_methods.h:134 [inline] validate_bset_keys+0x6c1/0x1390 fs/bcachefs/btree_io.c:983 bch2_btree_node_read_done+0x18c8/0x4f60 fs/bcachefs/btree_io.c:1211 btree_node_read_work+0x426/0xe30 fs/bcachefs/btree_io.c:1400 bch2_btree_node_read+0x887/0x29f0 fs/bcachefs/btree_io.c:-1 bch2_btree_node_fill+0xd12/0x14f0 fs/bcachefs/btree_cache.c:994 bch2_btree_node_get_noiter+0xa2c/0x1000 fs/bcachefs/btree_cache.c:1261 found_btree_node_is_readable fs/bcachefs/btree_node_scan.c:85 [inline] try_read_btree_node fs/bcachefs/btree_node_scan.c:220 [inline] read_btree_nodes_worker+0x1319/0x1e20 fs/bcachefs/btree_node_scan.c:269 kthread+0x711/0x8a0 kernel/kthread.c:464 ret_from_fork+0x4b/0x80 arch/x86/kernel/process.c:153 ret_from_fork_asm+0x1a/0x30 arch/x86/entry/entry_64.S:245 </TASK> Modules linked in: ---[ end trace 0000000000000000 ]--- RIP: 0010:__bch2_bkey_unpack_key+0xdeb/0xe10 fs/bcachefs/bkey.c:272 Code: b2 da 00 e9 f3 f9 ff ff e8 a2 10 aa fd 48 c7 c7 a0 7b 55 8e 48 89 ee 4c 89 f2 e8 20 b2 da 00 e9 2e fb ff ff e8 86 10 aa fd 90 <0f> 0b e8 7e 10 aa fd 90 0f 0b e8 76 10 aa fd 90 0f 0b e8 6e 10 aa RSP: 0018:ffffc9000d3e6ab8 EFLAGS: 00010293 RAX: ffffffff841519da RBX: 0000000000000003 RCX: ffff888000ad8000 RDX: 0000000000000000 RSI: 0000000000000005 RDI: 0000000000000006 RBP: 0000000000000005 R08: ffffc9000d3e6d4f R09: 0000000000000000 R10: ffffc9000d3e6d30 R11: fffff52001a7cdaa R12: ffffc9000d3e6d30 R13: ffff888046dc1028 R14: ffff88803ee140c1 R15: dffffc0000000000 FS: 0000000000000000(0000) GS:ffff88808d6b1000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 000055ce47cf57d0 CR3: 000000003f92f000 CR4: 0000000000352ef0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 --- 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
