CVE-2024-56744: In the Linux kernel, the following vulnerability has been resolved:  f2fs: fix to avoid potential deadlock in f2fs_record_stop_reason()  syzbot reports deadlock issue of f2fs as below:  ====================================================== WARNING: possible circular locking dependency detected 6.12.0-rc3-syzkaller-00087-gc964ced77262 #0 Not tainted ------------------------------------------------------ kswapd0/79 is trying to acquire lock: ffff888011824088 (&sbi->sb_lock){++++}-{3:3}, at: f2fs_down_write fs/f2fs/f2fs.h:2199 [inline] ffff888011824088 (&sbi->sb_lock){++++}-{3:3}, at: f2fs_record_stop_reason+0x52/0x1d0 fs/f2fs/super.c:4068  but task is already holding lock: ffff88804bd92610 (sb_internal#2){.+.+}-{0:0}, at: f2fs_evict_inode+0x662/0x15c0 fs/f2fs/inode.c:842  which lock already depends on the new lock.  the existing dependency chain (in reverse order) is:  -> #2 (sb_internal#2){.+.+}-{0:0}:        lock_acquire+0x1ed/0x550 kernel/locking/lockdep.c:5825        percpu_down_read include/linux/percpu-rwsem.h:51 [inline]        __sb_start_write include/linux/fs.h:1716 [inline]        sb_start_intwrite+0x4d/0x1c0 include/linux/fs.h:1899        f2fs_evict_inode+0x662/0x15c0 fs/f2fs/inode.c:842        evict+0x4e8/0x9b0 fs/inode.c:725        f2fs_evict_inode+0x1a4/0x15c0 fs/f2fs/inode.c:807        evict+0x4e8/0x9b0 fs/inode.c:725        dispose_list fs/inode.c:774 [inline]        prune_icache_sb+0x239/0x2f0 fs/inode.c:963        super_cache_scan+0x38c/0x4b0 fs/super.c:223        do_shrink_slab+0x701/0x1160 mm/shrinker.c:435        shrink_slab+0x1093/0x14d0 mm/shrinker.c:662        shrink_one+0x43b/0x850 mm/vmscan.c:4818        shrink_many mm/vmscan.c:4879 [inline]        lru_gen_shrink_node mm/vmscan.c:4957 [inline]        shrink_node+0x3799/0x3de0 mm/vmscan.c:5937        kswapd_shrink_node mm/vmscan.c:6765 [inline]        balance_pgdat mm/vmscan.c:6957 [inline]        kswapd+0x1ca3/0x3700 mm/vmscan.c:7226        kthread+0x2f0/0x390 kernel/kthread.c:389        ret_from_fork+0x4b/0x80 arch/x86/kernel/process.c:147        ret_from_fork_asm+0x1a/0x30 arch/x86/entry/entry_64.S:244  -> #1 (fs_reclaim){+.+.}-{0:0}:        lock_acquire+0x1ed/0x550 kernel/locking/lockdep.c:5825        __fs_reclaim_acquire mm/page_alloc.c:3834 [inline]        fs_reclaim_acquire+0x88/0x130 mm/page_alloc.c:3848        might_alloc include/linux/sched/mm.h:318 [inline]        prepare_alloc_pages+0x147/0x5b0 mm/page_alloc.c:4493        __alloc_pages_noprof+0x16f/0x710 mm/page_alloc.c:4722        alloc_pages_mpol_noprof+0x3e8/0x680 mm/mempolicy.c:2265        alloc_pages_noprof mm/mempolicy.c:2345 [inline]        folio_alloc_noprof+0x128/0x180 mm/mempolicy.c:2352        filemap_alloc_folio_noprof+0xdf/0x500 mm/filemap.c:1010        do_read_cache_folio+0x2eb/0x850 mm/filemap.c:3787        read_mapping_folio include/linux/pagemap.h:1011 [inline]        f2fs_commit_super+0x3c0/0x7d0 fs/f2fs/super.c:4032        f2fs_record_stop_reason+0x13b/0x1d0 fs/f2fs/super.c:4079        f2fs_handle_critical_error+0x2ac/0x5c0 fs/f2fs/super.c:4174        f2fs_write_inode+0x35f/0x4d0 fs/f2fs/inode.c:785        write_inode fs/fs-writeback.c:1503 [inline]        __writeback_single_inode+0x711/0x10d0 fs/fs-writeback.c:1723        writeback_single_inode+0x1f3/0x660 fs/fs-writeback.c:1779        sync_inode_metadata+0xc4/0x120 fs/fs-writeback.c:2849        f2fs_release_file+0xa8/0x100 fs/f2fs/file.c:1941        __fput+0x23f/0x880 fs/file_table.c:431        task_work_run+0x24f/0x310 kernel/task_work.c:228        resume_user_mode_work include/linux/resume_user_mode.h:50 [inline]        exit_to_user_mode_loop kernel/entry/common.c:114 [inline]        exit_to_user_mode_prepare include/linux/entry-common.h:328 [inline]        __syscall_exit_to_user_mode_work kernel/entry/common.c:207 [inline]        syscall_exit_to_user_mode+0x168/0x370 kernel/entry/common.c:218        do_syscall_64+0x100/0x230 arch/x86/entry/common.c:89        entry_SYSCALL_64_after_hwframe+0x77/0x7f  ---truncated---