The patch below does not apply to the 6.1-stable tree. If someone wants it applied there, or to any other stable or longterm tree, then please email the backport, including the original git commit id to stable@vger.kernel.org.

To reproduce the conflict and resubmit, you may use the following commands:

git fetch https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git/ linux-6.1.y git checkout FETCH_HEAD git cherry-pick -x 8cb1f4080dd91c6e6b01dbea013a3f42341cb6a1 # <resolve conflicts, build, test, etc.> git commit -s git send-email --to 'stable@vger.kernel.org' --in-reply-to '2024072914-caviar-emphasize-6bc8@gregkh' --subject-prefix 'PATCH 6.1.y' HEAD^..

Possible dependencies:

8cb1f4080dd9 ("f2fs: assign CURSEG_ALL_DATA_ATGC if blkaddr is valid") 21327a042dd9 ("f2fs: fix to avoid use SSR allocate when do defragment")

thanks,

greg k-h

------------------ original commit in Linus's tree ------------------

From 8cb1f4080dd91c6e6b01dbea013a3f42341cb6a1 Mon Sep 17 00:00:00 2001 From: Jaegeuk Kim jaegeuk@kernel.org Date: Tue, 18 Jun 2024 02:15:38 +0000 Subject: [PATCH] f2fs: assign CURSEG_ALL_DATA_ATGC if blkaddr is valid

mkdir /mnt/test/comp f2fs_io setflags compression /mnt/test/comp dd if=/dev/zero of=/mnt/test/comp/testfile bs=16k count=1 truncate --size 13 /mnt/test/comp/testfile

In the above scenario, we can get a BUG_ON. kernel BUG at fs/f2fs/segment.c:3589! Call Trace: do_write_page+0x78/0x390 [f2fs] f2fs_outplace_write_data+0x62/0xb0 [f2fs] f2fs_do_write_data_page+0x275/0x740 [f2fs] f2fs_write_single_data_page+0x1dc/0x8f0 [f2fs] f2fs_write_multi_pages+0x1e5/0xae0 [f2fs] f2fs_write_cache_pages+0xab1/0xc60 [f2fs] f2fs_write_data_pages+0x2d8/0x330 [f2fs] do_writepages+0xcf/0x270 __writeback_single_inode+0x44/0x350 writeback_sb_inodes+0x242/0x530 __writeback_inodes_wb+0x54/0xf0 wb_writeback+0x192/0x310 wb_workfn+0x30d/0x400

The reason is we gave CURSEG_ALL_DATA_ATGC to COMPR_ADDR where the page was set the gcing flag by set_cluster_dirty().

Cc: stable@vger.kernel.org Fixes: 4961acdd65c9 ("f2fs: fix to tag gcing flag on page during block migration") Reviewed-by: Chao Yu chao@kernel.org Tested-by: Will McVicker willmcvicker@google.com Signed-off-by: Jaegeuk Kim jaegeuk@kernel.org

diff --git a/fs/f2fs/segment.c b/fs/f2fs/segment.c index 362cfb550408..4db1add43e36 100644 --- a/fs/f2fs/segment.c +++ b/fs/f2fs/segment.c @@ -3505,6 +3505,7 @@ static int __get_segment_type_6(struct f2fs_io_info *fio) if (fio->sbi->am.atgc_enabled && (fio->io_type == FS_DATA_IO) && (fio->sbi->gc_mode != GC_URGENT_HIGH) && + __is_valid_data_blkaddr(fio->old_blkaddr) && !is_inode_flag_set(inode, FI_OPU_WRITE)) return CURSEG_ALL_DATA_ATGC; else