Hello, syzbot has tested the proposed patch but the reproducer is still triggering an issue: WARNING in iomap_write_begin XFS (loop0): Mounting V5 Filesystem bfdc47fc-10d8-4eed-a562-11a831b3f791 XFS (loop0): Ending clean mount XFS (loop0): Quotacheck needed: Please wait. XFS (loop0): Quotacheck: Done. ------------[ cut here ]------------ WARNING: CPU: 0 PID: 6042 at fs/iomap/buffered-io.c:727 __iomap_write_begin fs/iomap/buffered-io.c:727 [inline] WARNING: CPU: 0 PID: 6042 at fs/iomap/buffered-io.c:727 iomap_write_begin+0x13f0/0x16f0 fs/iomap/buffered-io.c:830 Modules linked in: CPU: 0 UID: 0 PID: 6042 Comm: syz.0.15 Not tainted 6.11.0-rc5-syzkaller-00015-g3e9bff3bbe13 #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 08/06/2024 RIP: 0010:__iomap_write_begin fs/iomap/buffered-io.c:727 [inline] RIP: 0010:iomap_write_begin+0x13f0/0x16f0 fs/iomap/buffered-io.c:830 Code: b6 0d 01 90 48 c7 c7 e0 53 fa 8b e8 da 10 2b ff 90 0f 0b 90 90 e9 74 ef ff ff e8 eb ec 68 ff e9 4b f6 ff ff e8 e1 ec 68 ff 90 <0f> 0b 90 bb fb ff ff ff e9 e9 fe ff ff e8 ce ec 68 ff 90 0f 0b 90 RSP: 0018:ffffc9000315f7c0 EFLAGS: 00010293 RAX: ffffffff822a9ebf RBX: 0000000000000080 RCX: ffff88801ff39e00 RDX: 0000000000000000 RSI: 0000000000000080 RDI: 0000000000000000 RBP: ffffc9000315fa50 R08: ffffffff822a9bc4 R09: 1ffff1100c1a82f9 R10: dffffc0000000000 R11: ffffed100c1a82fa R12: ffffc9000315f9b0 R13: ffffc9000315fbf0 R14: ffffc9000315f990 R15: 0000000000000800 FS: 00007f572bb8f6c0(0000) GS:ffff8880b9200000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 0000000020001000 CR3: 0000000020098000 CR4: 00000000003506f0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 Call Trace: <TASK> iomap_unshare_iter fs/iomap/buffered-io.c:1351 [inline] iomap_file_unshare+0x460/0x780 fs/iomap/buffered-io.c:1391 xfs_reflink_unshare+0x173/0x5f0 fs/xfs/xfs_reflink.c:1681 xfs_file_fallocate+0x6be/0xa50 fs/xfs/xfs_file.c:997 vfs_fallocate+0x553/0x6c0 fs/open.c:334 ksys_fallocate fs/open.c:357 [inline] __do_sys_fallocate fs/open.c:365 [inline] __se_sys_fallocate fs/open.c:363 [inline] __x64_sys_fallocate+0xbd/0x110 fs/open.c:363 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: 0033:0x7f572ad779f9 Code: ff ff c3 66 2e 0f 1f 84 00 00 00 00 00 0f 1f 40 00 48 89 f8 48 89 f7 48 89 d6 48 89 ca 4d 89 c2 4d 89 c8 4c 8b 4c 24 08 0f 05 <48> 3d 01 f0 ff ff 73 01 c3 48 c7 c1 a8 ff ff ff f7 d8 64 89 01 48 RSP: 002b:00007f572bb8f038 EFLAGS: 00000246 ORIG_RAX: 000000000000011d RAX: ffffffffffffffda RBX: 00007f572af05f80 RCX: 00007f572ad779f9 RDX: 0000000000000000 RSI: 0000000000000040 RDI: 0000000000000006 RBP: 00007f572ade58ee R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000002000 R11: 0000000000000246 R12: 0000000000000000 R13: 0000000000000000 R14: 00007f572af05f80 R15: 00007fff39de1648 </TASK> Tested on: commit: 3e9bff3b Merge tag 'vfs-6.11-rc6.fixes' of gitolite.ke.. git tree: upstream console output: https://syzkaller.appspot.com/x/log.txt?x=13ca847b980000 kernel config: https://syzkaller.appspot.com/x/.config?x=a0455552d0b27491 dashboard link: https://syzkaller.appspot.com/bug?extid=296b1c84b9cbf306e5a0 compiler: Debian clang version 15.0.6, GNU ld (GNU Binutils for Debian) 2.40 Note: no patches were applied.
