Hi, syzbot find a bug[0] in ext4 on android13-5.15-lts as below and it can be reproduced on mailine v6.1-rc5(094226ad94f4) too The log from mainline can be found in URL [1]. The bisect test shows below commit[2] is the first commit that reproduce the bug. With reverting the commit, there is no bug reproduced[3]. Is reverting the commit 21175ca434c5 a acceptable solution? Any fix work is in progress? [0] https://syzkaller.appspot.com/bug?id=5bafe4554067100b70f58a81268aa06ea3f9c345 [1] https://syzkaller.appspot.com/text?tag=CrashLog&x=118359c1880000 [2] 21175ca434c5 ext4: make prefetch_block_bitmaps default [3] https://groups.google.com/g/syzkaller-android-bugs/c/HKLNVJQICMM/m/YcHNpH_iBAAJ kernel BUG at fs/ext4/inline.c:227! invalid opcode: 0000 [#1] PREEMPT SMP KASAN Call Trace: <TASK> ext4_write_end+0x1af/0x9d0 fs/ext4/inode.c:1307 ext4_da_write_end+0x92/0xa70 fs/ext4/inode.c:3067 generic_perform_write+0x3c7/0x5d0 mm/filemap.c:3836 ext4_buffered_write_iter+0x49b/0x630 fs/ext4/file.c:271 ext4_file_write_iter+0x456/0x1dc0 do_iter_readv_writev+0x52a/0x720 do_iter_write+0x1f4/0x760 fs/read_write.c:855 vfs_iter_write+0x7c/0xa0 fs/read_write.c:896 iter_file_splice_write+0x810/0xfd0 fs/splice.c:689 do_splice_from fs/splice.c:767 [inline] direct_splice_actor+0xfe/0x130 fs/splice.c:934 splice_direct_to_actor+0x4d4/0xbd0 fs/splice.c:889 do_splice_direct+0x2a0/0x3f0 fs/splice.c:977 do_sendfile+0x63b/0xfd0 fs/read_write.c:1249 __do_sys_sendfile64 fs/read_write.c:1317 [inline] __se_sys_sendfile64 fs/read_write.c:1303 [inline] __x64_sys_sendfile64+0x1ce/0x230 fs/read_write.c:1303 do_syscall_x64 arch/x86/entry/common.c:50 [inline] do_syscall_64+0x44/0xd0 arch/x86/entry/common.c:80 entry_SYSCALL_64_after_hwframe+0x61/0xcb Regards, Jun
