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Description: btrfs: fix deadlock with concurrent chunk allocations involving system chunks
References:
Notes:
 carnil> Commit fixes eafa4fd0ad0607 ("btrfs: fix exhaustion of the
 carnil> system chunk array due to concurrent allocations") but the
 carnil> underlying issue might be present earlier.
 bwh> The fix is precisely a revert of commit eafa4fd0ad0607, so I
 bwh> don't believe there is an older issue.
Bugs:
upstream: released (5.14-rc2) [1cb3db1cf383a3c7dbda1aa0ce748b0958759947]
5.10-upstream-stable: N/A "Vulnerability introduced later"
4.19-upstream-stable: N/A "Vulnerability introduced later"
4.9-upstream-stable: N/A "Vulnerability introduced later"
sid: released (5.14.6-1)
5.10-bullseye-security: N/A "Vulnerability introduced later"
4.19-buster-security: N/A "Vulnerability introduced later"
4.9-stretch-security: N/A "Vulnerability introduced later"

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