{"id":"CVE-2023-53791","state":"PUBLISHED","title":"md: fix warning for holder mismatch from export_rdev()","description":"In the Linux kernel, the following vulnerability has been resolved:\n\nmd: fix warning for holder mismatch from export_rdev()\n\nCommit a1d767191096 (\"md: use mddev->external to select holder in\nexport_rdev()\") fix the problem that 'claim_rdev' is used for\nblkdev_get_by_dev() while 'rdev' is used for blkdev_put().\n\nHowever, if mddev->external is changed from 0 to 1, then 'rdev' is used\nfor blkdev_get_by_dev() while 'claim_rdev' is used for blkdev_put(). And\nthis problem can be reporduced reliably by following:\n\nNew file: mdadm/tests/23rdev-lifetime\n\ndevname=${dev0##*/}\ndevt=`cat /sys/block/$devname/dev`\npid=\"\"\nruntime=2\n\nclean_up_test() {\n        pill -9 $pid\n        echo clear > /sys/block/md0/md/array_state\n}\n\ntrap 'clean_up_test' EXIT\n\nadd_by_sysfs() {\n        while true; do\n                echo $devt > /sys/block/md0/md/new_dev\n        done\n}\n\nremove_by_sysfs(){\n        while true; do\n                echo remove > /sys/block/md0/md/dev-${devname}/state\n        done\n}\n\necho md0 > /sys/module/md_mod/parameters/new_array || die \"create md0 failed\"\n\nadd_by_sysfs &\npid=\"$pid $!\"\n\nremove_by_sysfs &\npid=\"$pid $!\"\n\nsleep $runtime\nexit 0\n\nTest cmd:\n\n./test --save-logs --logdir=/tmp/ --keep-going --dev=loop --tests=23rdev-lifetime\n\nTest result:\n\n------------[ cut here ]------------\nWARNING: CPU: 0 PID: 960 at block/bdev.c:618 blkdev_put+0x27c/0x330\nModules linked in: multipath md_mod loop\nCPU: 0 PID: 960 Comm: test Not tainted 6.5.0-rc2-00121-g01e55c376936-dirty #50\nRIP: 0010:blkdev_put+0x27c/0x330\nCall Trace:\n <TASK>\n export_rdev.isra.23+0x50/0xa0 [md_mod]\n mddev_unlock+0x19d/0x300 [md_mod]\n rdev_attr_store+0xec/0x190 [md_mod]\n sysfs_kf_write+0x52/0x70\n kernfs_fop_write_iter+0x19a/0x2a0\n vfs_write+0x3b5/0x770\n ksys_write+0x74/0x150\n __x64_sys_write+0x22/0x30\n do_syscall_64+0x40/0x90\n entry_SYSCALL_64_after_hwframe+0x63/0xcd\n\nFix the problem by recording if 'rdev' is used as holder.","publishedAt":"2025-12-09T00:00:48.301Z","updatedAt":"2026-05-11T19:51:35.874Z","severity":null,"assigner":"Linux","products":["Linux Linux"],"affected":[{"vendor":"Linux","product":"Linux","defaultStatus":"unaffected","versions":[{"version":"a1d7671910965ca9f8f0377e7e3bfd1179fba4d8","status":"affected","lessThan":"99fcd427178d0f58f5520f8f01df727f8eaeb2c7","versionType":"git"},{"version":"a1d7671910965ca9f8f0377e7e3bfd1179fba4d8","status":"affected","lessThan":"99892147f028d711f9d40fefad4f33632593864c","versionType":"git"}],"repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","programFiles":["drivers/md/md.c","drivers/md/md.h"]},{"vendor":"Linux","product":"Linux","defaultStatus":"affected","versions":[{"version":"6.5","status":"affected"},{"version":"0","status":"unaffected","lessThan":"6.5","versionType":"semver"},{"version":"6.5.5","status":"unaffected","lessThanOrEqual":"6.5.*","versionType":"semver"},{"version":"6.6","status":"unaffected","lessThanOrEqual":"*","versionType":"original_commit_for_fix"}],"repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","programFiles":["drivers/md/md.c","drivers/md/md.h"]}],"references":["https://git.kernel.org/stable/c/99fcd427178d0f58f5520f8f01df727f8eaeb2c7","https://git.kernel.org/stable/c/99892147f028d711f9d40fefad4f33632593864c"],"weaknesses":[],"ingestedAt":"2026-10-29T20:06:33.064Z","source":{"repository":"CVEProject/cvelistV5","path":"cves/2023/53xxx/CVE-2023-53791.json","commit":"556c9d3a8cd17e218bb8e452ba7cd619a384ff47"},"raw":{"dataType":"CVE_RECORD","dataVersion":"5.2","cveMetadata":{"cveId":"CVE-2023-53791","state":"PUBLISHED","datePublished":"2025-12-09T00:00:48.301Z","dateUpdated":"2026-05-11T19:51:35.874Z","assignerShortName":"Linux","assignerOrgId":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","dateReserved":"2025-12-08T23:58:35.274Z"},"containers":{"cna":{"title":"md: fix warning for holder mismatch from export_rdev()","descriptions":[{"lang":"en","value":"In the Linux kernel, the following vulnerability has been resolved:\n\nmd: fix warning for holder mismatch from export_rdev()\n\nCommit a1d767191096 (\"md: use mddev->external to select holder in\nexport_rdev()\") fix the problem that 'claim_rdev' is used for\nblkdev_get_by_dev() while 'rdev' is used for blkdev_put().\n\nHowever, if mddev->external is changed from 0 to 1, then 'rdev' is used\nfor blkdev_get_by_dev() while 'claim_rdev' is used for blkdev_put(). And\nthis problem can be reporduced reliably by following:\n\nNew file: mdadm/tests/23rdev-lifetime\n\ndevname=${dev0##*/}\ndevt=`cat /sys/block/$devname/dev`\npid=\"\"\nruntime=2\n\nclean_up_test() {\n        pill -9 $pid\n        echo clear > /sys/block/md0/md/array_state\n}\n\ntrap 'clean_up_test' EXIT\n\nadd_by_sysfs() {\n        while true; do\n                echo $devt > /sys/block/md0/md/new_dev\n        done\n}\n\nremove_by_sysfs(){\n        while true; do\n                echo remove > /sys/block/md0/md/dev-${devname}/state\n        done\n}\n\necho md0 > /sys/module/md_mod/parameters/new_array || die \"create md0 failed\"\n\nadd_by_sysfs &\npid=\"$pid $!\"\n\nremove_by_sysfs &\npid=\"$pid $!\"\n\nsleep $runtime\nexit 0\n\nTest cmd:\n\n./test --save-logs --logdir=/tmp/ --keep-going --dev=loop --tests=23rdev-lifetime\n\nTest result:\n\n------------[ cut here ]------------\nWARNING: CPU: 0 PID: 960 at block/bdev.c:618 blkdev_put+0x27c/0x330\nModules linked in: multipath md_mod loop\nCPU: 0 PID: 960 Comm: test Not tainted 6.5.0-rc2-00121-g01e55c376936-dirty #50\nRIP: 0010:blkdev_put+0x27c/0x330\nCall Trace:\n <TASK>\n export_rdev.isra.23+0x50/0xa0 [md_mod]\n mddev_unlock+0x19d/0x300 [md_mod]\n rdev_attr_store+0xec/0x190 [md_mod]\n sysfs_kf_write+0x52/0x70\n kernfs_fop_write_iter+0x19a/0x2a0\n vfs_write+0x3b5/0x770\n ksys_write+0x74/0x150\n __x64_sys_write+0x22/0x30\n do_syscall_64+0x40/0x90\n entry_SYSCALL_64_after_hwframe+0x63/0xcd\n\nFix the problem by recording if 'rdev' is used as holder."}],"affected":[{"vendor":"Linux","product":"Linux","defaultStatus":"unaffected","versions":[{"version":"a1d7671910965ca9f8f0377e7e3bfd1179fba4d8","status":"affected","lessThan":"99fcd427178d0f58f5520f8f01df727f8eaeb2c7","versionType":"git"},{"version":"a1d7671910965ca9f8f0377e7e3bfd1179fba4d8","status":"affected","lessThan":"99892147f028d711f9d40fefad4f33632593864c","versionType":"git"}],"repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","programFiles":["drivers/md/md.c","drivers/md/md.h"]},{"vendor":"Linux","product":"Linux","defaultStatus":"affected","versions":[{"version":"6.5","status":"affected"},{"version":"0","status":"unaffected","lessThan":"6.5","versionType":"semver"},{"version":"6.5.5","status":"unaffected","lessThanOrEqual":"6.5.*","versionType":"semver"},{"version":"6.6","status":"unaffected","lessThanOrEqual":"*","versionType":"original_commit_for_fix"}],"repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","programFiles":["drivers/md/md.c","drivers/md/md.h"]}],"references":[{"url":"https://git.kernel.org/stable/c/99fcd427178d0f58f5520f8f01df727f8eaeb2c7"},{"url":"https://git.kernel.org/stable/c/99892147f028d711f9d40fefad4f33632593864c"}],"providerMetadata":{"shortName":"Linux","orgId":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","dateUpdated":"2026-05-11T19:51:35.874Z"},"cpeApplicability":[{"nodes":[{"operator":"OR","negate":false,"cpeMatch":[{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"6.5","versionEndExcluding":"6.5.5"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"6.5","versionEndExcluding":"6.6"}]}]}],"x_generator":{"engine":"bippy-1.2.0"}}}}}