Hello, syzbot found the following issue on: HEAD commit: 8560697b23dc Merge tag '6.15-rc2-smb3-client-fixes' of git.. git tree: upstream console output: https://syzkaller.appspot.com/x/log.txt?x=11d3dfe4580000 kernel config: https://syzkaller.appspot.com/x/.config?x=a27b81e0cf56c60b dashboard link: https://syzkaller.appspot.com/bug?extid=b4a84825ea149bb99bfc compiler: Debian clang version 15.0.6, Debian LLD 15.0.6 Unfortunately, I don't have any reproducer for this issue yet. Downloadable assets: disk image: https://storage.googleapis.com/syzbot-assets/03806cf4a3af/disk-8560697b.raw.xz vmlinux: https://storage.googleapis.com/syzbot-assets/6d86507d5b30/vmlinux-8560697b.xz kernel image: https://storage.googleapis.com/syzbot-assets/f5f2020007a8/bzImage-8560697b.xz IMPORTANT: if you fix the issue, please add the following tag to the commit: Reported-by: syzbot+b4a84825ea149bb99bfc@xxxxxxxxxxxxxxxxxxxxxxxxx ===================================================== BUG: KMSAN: uninit-value in xfs_dialloc_ag_inobt+0x99b/0x2550 fs/xfs/libxfs/xfs_ialloc.c:1173 xfs_dialloc_ag_inobt+0x99b/0x2550 fs/xfs/libxfs/xfs_ialloc.c:1173 xfs_dialloc_ag fs/xfs/libxfs/xfs_ialloc.c:1585 [inline] xfs_dialloc_try_ag fs/xfs/libxfs/xfs_ialloc.c:1835 [inline] xfs_dialloc+0x14c4/0x3470 fs/xfs/libxfs/xfs_ialloc.c:1945 xfs_create_tmpfile+0x496/0x12c0 fs/xfs/xfs_inode.c:827 xfs_generic_create+0x65c/0x1610 fs/xfs/xfs_iops.c:227 xfs_vn_tmpfile+0x6b/0x140 fs/xfs/xfs_iops.c:1194 vfs_tmpfile+0x5e4/0xe40 fs/namei.c:3896 do_tmpfile+0x19d/0x460 fs/namei.c:3961 path_openat+0x4837/0x6280 fs/namei.c:3995 do_filp_open+0x26b/0x610 fs/namei.c:4031 io_openat2+0x5d5/0xa50 io_uring/openclose.c:140 io_openat+0x35/0x40 io_uring/openclose.c:177 __io_issue_sqe io_uring/io_uring.c:1734 [inline] io_issue_sqe+0x394/0x1de0 io_uring/io_uring.c:1753 io_wq_submit_work+0xaf8/0xde0 io_uring/io_uring.c:1868 io_worker_handle_work+0xc4d/0x2090 io_uring/io-wq.c:615 io_wq_worker+0x403/0x1470 io_uring/io-wq.c:669 ret_from_fork+0x6d/0x90 arch/x86/kernel/process.c:153 ret_from_fork_asm+0x1a/0x30 arch/x86/entry/entry_64.S:245 Uninit was stored to memory at: xfs_dialloc_ag_inobt+0x1cc1/0x2550 fs/xfs/libxfs/xfs_ialloc.c:1227 xfs_dialloc_ag fs/xfs/libxfs/xfs_ialloc.c:1585 [inline] xfs_dialloc_try_ag fs/xfs/libxfs/xfs_ialloc.c:1835 [inline] xfs_dialloc+0x14c4/0x3470 fs/xfs/libxfs/xfs_ialloc.c:1945 xfs_create_tmpfile+0x496/0x12c0 fs/xfs/xfs_inode.c:827 xfs_generic_create+0x65c/0x1610 fs/xfs/xfs_iops.c:227 xfs_vn_tmpfile+0x6b/0x140 fs/xfs/xfs_iops.c:1194 vfs_tmpfile+0x5e4/0xe40 fs/namei.c:3896 do_tmpfile+0x19d/0x460 fs/namei.c:3961 path_openat+0x4837/0x6280 fs/namei.c:3995 do_filp_open+0x26b/0x610 fs/namei.c:4031 io_openat2+0x5d5/0xa50 io_uring/openclose.c:140 io_openat+0x35/0x40 io_uring/openclose.c:177 __io_issue_sqe io_uring/io_uring.c:1734 [inline] io_issue_sqe+0x394/0x1de0 io_uring/io_uring.c:1753 io_wq_submit_work+0xaf8/0xde0 io_uring/io_uring.c:1868 io_worker_handle_work+0xc4d/0x2090 io_uring/io-wq.c:615 io_wq_worker+0x403/0x1470 io_uring/io-wq.c:669 ret_from_fork+0x6d/0x90 arch/x86/kernel/process.c:153 ret_from_fork_asm+0x1a/0x30 arch/x86/entry/entry_64.S:245 Local variable trec created at: xfs_dialloc_ag_inobt+0x139/0x2550 fs/xfs/libxfs/xfs_ialloc.c:1101 xfs_dialloc_ag fs/xfs/libxfs/xfs_ialloc.c:1585 [inline] xfs_dialloc_try_ag fs/xfs/libxfs/xfs_ialloc.c:1835 [inline] xfs_dialloc+0x14c4/0x3470 fs/xfs/libxfs/xfs_ialloc.c:1945 CPU: 1 UID: 0 PID: 7854 Comm: iou-wrk-7829 Not tainted 6.15.0-rc2-syzkaller-00404-g8560697b23dc #0 PREEMPT(undef) Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 02/12/2025 ===================================================== --- 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
