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  - ext4: avoid journaling sb update on error if journal is destroying Presently we always BUG_ON if trying to     start a transaction on a journal marked with JBD2_UNMOUNT, since this should never happen. However, while     ltp running stress tests, it was observed that in case of some error handling paths, it is possible for     update_super_work to start a transaction after the journal is destroyed eg: (umount) ext4_kill_sb     kill_block_super generic_shutdown_super sync_filesystem /* commits all txns */ evict_inodes /* might start     a new txn */ ext4_put_super flush_work(&sbi->s_sb_upd_work) /* flush the workqueue */ jbd2_journal_destroy     journal_kill_thread journal->j_flags |= JBD2_UNMOUNT; jbd2_journal_commit_transaction     jbd2_journal_get_descriptor_buffer jbd2_journal_bmap ext4_journal_bmap ext4_map_blocks ...
    ext4_inode_error ext4_handle_error schedule_work(&sbi->s_sb_upd_work) /* work queue kicks in */     update_super_work jbd2_journal_start start_this_handle BUG_ON(journal->j_flags & JBD2_UNMOUNT) Hence,     introduce a new mount flag to indicate journal is destroying and only do a journaled (and deferred) update     of sb if this flag is not set. Otherwise, just fallback to an un-journaled commit. Further, in the journal     destroy path, we have the following sequence: 1. Set mount flag indicating journal is destroying 2. force     a commit and wait for it 3. flush pending sb updates This sequence is important as it ensures that, after     this point, there is no sb update that might be journaled so it is safe to update the sb outside the     journal. (To avoid race discussed in 2d01ddc86606) Also, we don't need a similar check in     ext4_grp_locked_error since it is only called from mballoc and AFAICT it would be always valid to schedule     work here. (CVE-2025-22113)

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Linux Distros Unpatched Vulnerability : CVE-2025-22113

high Nessus Plugin ID 244017

Version 1.2