Hello, syzbot found the following issue on:
HEAD commit: 563a50672d8a Merge tag 'xfs-6.10-fixes-4' of git://git.ker.. git tree: upstream console output: https://syzkaller.appspot.com/x/log.txt?x=1286cdda980000 kernel config: https://syzkaller.appspot.com/x/.config?x=c3820d4fff43c7a3 dashboard link: https://syzkaller.appspot.com/bug?extid=835d255ad6bc7f29ee12 compiler: gcc (Debian 12.2.0-14) 12.2.0, GNU ld (GNU Binutils for Debian) 2.40 syz repro: https://syzkaller.appspot.com/x/repro.syz?x=15e2d08e980000 C reproducer: https://syzkaller.appspot.com/x/repro.c?x=1009808e980000 Downloadable assets: disk image (non-bootable): https://storage.googleapis.com/syzbot-assets/7bc7510fe41f/non_bootable_disk-563a5067.raw.xz vmlinux: https://storage.googleapis.com/syzbot-assets/6ef95d163dde/vmlinux-563a5067.xz kernel image: https://storage.googleapis.com/syzbot-assets/0102d9e1ac9a/bzImage-563a5067.xz mounted in repro: https://storage.googleapis.com/syzbot-assets/7fdc5cd163b4/mount_0.gz IMPORTANT: if you fix the issue, please add the following tag to the commit: Reported-by: [email protected] bcachefs (loop0): stripes_read... done bcachefs (loop0): snapshots_read... done bcachefs (loop0): journal_replay... done bcachefs (loop0): resume_logged_ops... done ------------[ cut here ]------------ UBSAN: shift-out-of-bounds in ./include/linux/log2.h:67:13 shift exponent 4294967295 is too large for 64-bit type 'long unsigned int' CPU: 0 PID: 5189 Comm: syz-executor355 Not tainted 6.10.0-rc4-syzkaller-00283-g563a50672d8a #0 Hardware name: QEMU Standard PC (Q35 + ICH9, 2009), BIOS 1.16.2-debian-1.16.2-1 04/01/2014 Call Trace: <TASK> __dump_stack lib/dump_stack.c:88 [inline] dump_stack_lvl+0x16c/0x1f0 lib/dump_stack.c:114 ubsan_epilogue lib/ubsan.c:231 [inline] __ubsan_handle_shift_out_of_bounds+0x2a5/0x480 lib/ubsan.c:468 __rounddown_pow_of_two include/linux/log2.h:67 [inline] eytzinger1_first fs/bcachefs/eytzinger.h:51 [inline] eytzinger0_first fs/bcachefs/eytzinger.h:194 [inline] bch2_blacklist_entries_gc.cold+0x35/0x56 fs/bcachefs/journal_seq_blacklist.c:235 bch2_fs_recovery+0x3240/0x3e40 fs/bcachefs/recovery.c:897 bch2_fs_start+0x2e9/0x600 fs/bcachefs/super.c:1036 bch2_fs_open+0xfa0/0x1110 fs/bcachefs/super.c:2128 bch2_mount+0xe2c/0x1230 fs/bcachefs/fs.c:1926 legacy_get_tree+0x109/0x220 fs/fs_context.c:662 vfs_get_tree+0x8f/0x380 fs/super.c:1780 do_new_mount fs/namespace.c:3352 [inline] path_mount+0x14e6/0x1f20 fs/namespace.c:3679 do_mount fs/namespace.c:3692 [inline] __do_sys_mount fs/namespace.c:3898 [inline] __se_sys_mount fs/namespace.c:3875 [inline] __x64_sys_mount+0x297/0x320 fs/namespace.c:3875 do_syscall_x64 arch/x86/entry/common.c:52 [inline] do_syscall_64+0xcd/0x250 arch/x86/entry/common.c:83 entry_SYSCALL_64_after_hwframe+0x77/0x7f RIP: 0033:0x7fd8395e2bba 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:00007ffe022b6078 EFLAGS: 00000282 ORIG_RAX: 00000000000000a5 RAX: ffffffffffffffda RBX: 00007ffe022b6090 RCX: 00007fd8395e2bba RDX: 0000000020011a00 RSI: 0000000020000040 RDI: 00007ffe022b6090 RBP: 0000000000000004 R08: 00007ffe022b60d0 R09: 00000000000119f4 R10: 0000000001200014 R11: 0000000000000282 R12: 0000000001200014 R13: 00007ffe022b60d0 R14: 0000000000000003 R15: 0000000001000000 </TASK> ---[ end trace ]--- --- 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
