{
  "schema_version": "1.6.1",
  "id": "RPI-CVE-2024-56744",
  "modified": "2026-10-07T17:22:01Z",
  "upstream": [
    "CVE-2024-56744"
  ],
  "published": "2024-12-29T11:31:32Z",
  "summary": "f2fs: fix to avoid potential deadlock in f2fs_record_stop_reason()",
  "details": "In the Linux kernel, the following vulnerability has been resolved:\n\nf2fs: fix to avoid potential deadlock in f2fs_record_stop_reason()\n\nsyzbot reports deadlock issue of f2fs as below:\n\n======================================================\nWARNING: possible circular locking dependency detected\n6.12.0-rc3-syzkaller-00087-gc964ced77262 #0 Not tainted\n------------------------------------------------------\nkswapd0/79 is trying to acquire lock:\nffff888011824088 (&sbi->sb_lock){++++}-{3:3}, at: f2fs_down_write fs/f2fs/f2fs.h:2199 [inline]\nffff888011824088 (&sbi->sb_lock){++++}-{3:3}, at: f2fs_record_stop_reason+0x52/0x1d0 fs/f2fs/super.c:4068\n\nbut task is already holding lock:\nffff88804bd92610 (sb_internal#2){.+.+}-{0:0}, at: f2fs_evict_inode+0x662/0x15c0 fs/f2fs/inode.c:842\n\nwhich lock already depends on the new lock.\n\nthe existing dependency chain (in reverse order) is:\n\n-> #2 (sb_internal#2){.+.+}-{0:0}:\n       lock_acquire+0x1ed/0x550 kernel/locking/lockdep.c:5825\n       percpu_down_read include/linux/percpu-rwsem.h:51 [inline]\n       __sb_start_write include/linux/fs.h:1716 [inline]\n       sb_start_intwrite+0x4d/0x1c0 include/linux/fs.h:1899\n       f2fs_evict_inode+0x662/0x15c0 fs/f2fs/inode.c:842\n       evict+0x4e8/0x9b0 fs/inode.c:725\n       f2fs_evict_inode+0x1a4/0x15c0 fs/f2fs/inode.c:807\n       evict+0x4e8/0x9b0 fs/inode.c:725\n       dispose_list fs/inode.c:774 [inline]\n       prune_icache_sb+0x239/0x2f0 fs/inode.c:963\n       super_cache_scan+0x38c/0x4b0 fs/super.c:223\n       do_shrink_slab+0x701/0x1160 mm/shrinker.c:435\n       shrink_slab+0x1093/0x14d0 mm/shrinker.c:662\n       shrink_one+0x43b/0x850 mm/vmscan.c:4818\n       shrink_many mm/vmscan.c:4879 [inline]\n       lru_gen_shrink_node mm/vmscan.c:4957 [inline]\n       shrink_node+0x3799/0x3de0 mm/vmscan.c:5937\n       kswapd_shrink_node mm/vmscan.c:6765 [inline]\n       balance_pgdat mm/vmscan.c:6957 [inline]\n       kswapd+0x1ca3/0x3700 mm/vmscan.c:7226\n       kthread+0x2f0/0x390 kernel/kthread.c:389\n       ret_from_fork+0x4b/0x80 arch/x86/kernel/process.c:147\n       ret_from_fork_asm+0x1a/0x30 arch/x86/entry/entry_64.S:244\n\n-> #1 (fs_reclaim){+.+.}-{0:0}:\n       lock_acquire+0x1ed/0x550 kernel/locking/lockdep.c:5825\n       __fs_reclaim_acquire mm/page_alloc.c:3834 [inline]\n       fs_reclaim_acquire+0x88/0x130 mm/page_alloc.c:3848\n       might_alloc include/linux/sched/mm.h:318 [inline]\n       prepare_alloc_pages+0x147/0x5b0 mm/page_alloc.c:4493\n       __alloc_pages_noprof+0x16f/0x710 mm/page_alloc.c:4722\n       alloc_pages_mpol_noprof+0x3e8/0x680 mm/mempolicy.c:2265\n       alloc_pages_noprof mm/mempolicy.c:2345 [inline]\n       folio_alloc_noprof+0x128/0x180 mm/mempolicy.c:2352\n       filemap_alloc_folio_noprof+0xdf/0x500 mm/filemap.c:1010\n       do_read_cache_folio+0x2eb/0x850 mm/filemap.c:3787\n       read_mapping_folio include/linux/pagemap.h:1011 [inline]\n       f2fs_commit_super+0x3c0/0x7d0 fs/f2fs/super.c:4032\n       f2fs_record_stop_reason+0x13b/0x1d0 fs/f2fs/super.c:4079\n       f2fs_handle_critical_error+0x2ac/0x5c0 fs/f2fs/super.c:4174\n       f2fs_write_inode+0x35f/0x4d0 fs/f2fs/inode.c:785\n       write_inode fs/fs-writeback.c:1503 [inline]\n       __writeback_single_inode+0x711/0x10d0 fs/fs-writeback.c:1723\n       writeback_single_inode+0x1f3/0x660 fs/fs-writeback.c:1779\n       sync_inode_metadata+0xc4/0x120 fs/fs-writeback.c:2849\n       f2fs_release_file+0xa8/0x100 fs/f2fs/file.c:1941\n       __fput+0x23f/0x880 fs/file_table.c:431\n       task_work_run+0x24f/0x310 kernel/task_work.c:228\n       resume_user_mode_work include/linux/resume_user_mode.h:50 [inline]\n       exit_to_user_mode_loop kernel/entry/common.c:114 [inline]\n       exit_to_user_mode_prepare include/linux/entry-common.h:328 [inline]\n       __syscall_exit_to_user_mode_work kernel/entry/common.c:207 [inline]\n       syscall_exit_to_user_mode+0x168/0x370 kernel/entry/common.c:218\n       do_syscall_64+0x100/0x230 arch/x86/entry/common.c:89\n       entry_SYSCALL_64_after_hwframe+0x77/0x7f\n\n---truncated---",
  "affected": [
    {
      "package": {
        "ecosystem": "Raspberry Pi OS:12",
        "name": "linux"
      },
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        "1:6.6.51-1+rpt2",
        "1:6.6.51-1+rpt3",
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            "assessment": "commit ancestry (strak rule)",
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          },
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            "assessment": "commit ancestry (strak rule)",
            "upstream_fixed": "6.6.64"
          }
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    }
  ],
  "references": [
    {
      "type": "ADVISORY",
      "url": "https://www.cve.org/CVERecord?id=CVE-2024-56744"
    },
    {
      "type": "FIX",
      "url": "https://git.kernel.org/stable/c/ecf4e6782b01fd578b565b3dd2be7bb0ac91082e"
    },
    {
      "type": "FIX",
      "url": "https://git.kernel.org/stable/c/1539a088b108996bcdaddb7775070b5163b14233"
    },
    {
      "type": "FIX",
      "url": "https://git.kernel.org/stable/c/801092a2c9c251ef6a8678fcb8fcc1220474a697"
    },
    {
      "type": "FIX",
      "url": "https://git.kernel.org/stable/c/f10a890308a7cd8794e21f646f09827c6cb4bf5d"
    }
  ],
  "database_specific": {
    "source": "https://git.kernel.org/pub/scm/linux/security/vulns.git",
    "upstream_modified": "2026-05-24T06:48:58Z"
  }
}