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THREATINT
PUBLISHED

CVE-2024-50006

ext4: fix i_data_sem unlock order in ext4_ind_migrate()



Description

In the Linux kernel, the following vulnerability has been resolved: ext4: fix i_data_sem unlock order in ext4_ind_migrate() Fuzzing reports a possible deadlock in jbd2_log_wait_commit. This issue is triggered when an EXT4_IOC_MIGRATE ioctl is set to require synchronous updates because the file descriptor is opened with O_SYNC. This can lead to the jbd2_journal_stop() function calling jbd2_might_wait_for_commit(), potentially causing a deadlock if the EXT4_IOC_MIGRATE call races with a write(2) system call. This problem only arises when CONFIG_PROVE_LOCKING is enabled. In this case, the jbd2_might_wait_for_commit macro locks jbd2_handle in the jbd2_journal_stop function while i_data_sem is locked. This triggers lockdep because the jbd2_journal_start function might also lock the same jbd2_handle simultaneously. Found by Linux Verification Center (linuxtesting.org) with syzkaller. Rule: add

Reserved 2024-10-21 | Published 2024-10-21 | Updated 2025-05-04 | Assigner Linux

Product status

Default status
unaffected

1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 before 4192adefc9c570698821c5eb9873320eac2fcbf1
affected

1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 before 3c46d6060d3e38de22196c1fe7706c5a3c696285
affected

1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 before 53b1999cfd2c7addf2e581a32865fe8835467b44
affected

1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 before ef05572da0c0eb89614ed01cc17d3c882bdbd1ff
affected

1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 before 9fedf51ab8cf7b69bff08f37fe0989fec7f5d870
affected

1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 before d43776b907659affef1de888525847d64b244194
affected

1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 before 6252cb6bde7fc76cb8dcb49d1def7c326b190820
affected

1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 before d58a00e981d3118b91d503da263e640b7cde6729
affected

1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 before cc749e61c011c255d81b192a822db650c68b313f
affected

Default status
affected

4.19.323
unaffected

5.4.285
unaffected

5.10.227
unaffected

5.15.168
unaffected

6.1.113
unaffected

6.6.55
unaffected

6.10.14
unaffected

6.11.3
unaffected

6.12
unaffected

References

git.kernel.org/...c/4192adefc9c570698821c5eb9873320eac2fcbf1

git.kernel.org/...c/3c46d6060d3e38de22196c1fe7706c5a3c696285

git.kernel.org/...c/53b1999cfd2c7addf2e581a32865fe8835467b44

git.kernel.org/...c/ef05572da0c0eb89614ed01cc17d3c882bdbd1ff

git.kernel.org/...c/9fedf51ab8cf7b69bff08f37fe0989fec7f5d870

git.kernel.org/...c/d43776b907659affef1de888525847d64b244194

git.kernel.org/...c/6252cb6bde7fc76cb8dcb49d1def7c326b190820

git.kernel.org/...c/d58a00e981d3118b91d503da263e640b7cde6729

git.kernel.org/...c/cc749e61c011c255d81b192a822db650c68b313f

cve.org (CVE-2024-50006)

nvd.nist.gov (CVE-2024-50006)

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