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CVE-2022-50766

btrfs: set generation before calling btrfs_clean_tree_block in btrfs_init_new_buffer

In the Linux kernel, the following vulnerability has been resolved:

btrfs: set generation before calling btrfs_clean_tree_block in btrfs_init_new_buffer

syzbot is reporting uninit-value in btrfs_clean_tree_block() [1], for
commit bc877d285ca3dba2 ("btrfs: Deduplicate extent_buffer init code")
missed that btrfs_set_header_generation() in btrfs_init_new_buffer() must
not be moved to after clean_tree_block() because clean_tree_block() is
calling btrfs_header_generation() since commit 55c69072d6bd5be1 ("Btrfs:
Fix extent_buffer usage when nodesize != leafsize").

Since memzero_extent_buffer() will reset "struct btrfs_header" part, we
can't move btrfs_set_header_generation() to before memzero_extent_buffer().
Just re-add btrfs_set_header_generation() before btrfs_clean_tree_block().
Daten sind bereitgestellt durch das CVE Programm von einer CVE Numbering Authority (CNA) (Unstrukturiert).
HerstellerLinux
≫
Produkt Linux
Default Statusunaffected
Version bc877d285ca3dba24c52406946a4a69847cc7422
Version < 0a408c6212c16b9a2a1141d3c531247582ef8101
Status affected
Version bc877d285ca3dba24c52406946a4a69847cc7422
Version < a687c2890fe4a2acaac6941fa4097a1264d8f3eb
Status affected
Version bc877d285ca3dba24c52406946a4a69847cc7422
Version < 89bc41c92d10b905c60f6ec13c9ef664a3555c54
Status affected
Version bc877d285ca3dba24c52406946a4a69847cc7422
Version < cbddcc4fa3443fe8cfb2ff8e210deb1f6a0eea38
Status affected
HerstellerLinux
≫
Produkt Linux
Default Statusaffected
Version 4.19
Status affected
Version 0
Version < 4.19
Status unaffected
Version <= 5.15.*
Version 5.15.75
Status unaffected
Version <= 5.19.*
Version 5.19.17
Status unaffected
Version <= 6.0.*
Version 6.0.3
Status unaffected
Version <= *
Version 6.1
Status unaffected
VulnDex Vulnerability Enrichment
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EPSS Metriken
Typ Quelle Score Percentile
EPSS FIRST.org 0.03% 0.099
CVSS Metriken
Quelle Base Score Exploit Score Impact Score Vector String
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