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| author | Filipe Manana <fdmanana@suse.com> | 2025-04-16 16:00:28 +0100 |
|---|---|---|
| committer | Greg Kroah-Hartman <gregkh@linuxfoundation.org> | 2025-06-19 15:32:32 +0200 |
| commit | 3c04fafeb3ee233617c185b6bc6c3fe96e03b602 (patch) | |
| tree | 394a6a6c69c43150ad741317c0f28eef647efee4 /drivers/usb/cdns3/cdnsp-pci.c | |
| parent | 7b4bf4d8968384b9b61a610f3494e245d68cd3c7 (diff) | |
btrfs: exit after state split error at set_extent_bit()
[ Upstream commit 41d69d4d78d8b179bf3bcdfc56d28a12b3a608d2 ]
If split_state() returned an error we call extent_io_tree_panic() which
will trigger a BUG() call. However if CONFIG_BUG is disabled, which is an
uncommon and exotic scenario, then we fallthrough and hit a use after free
when calling set_state_bits() since the extent state record which the
local variable 'prealloc' points to was freed by split_state().
So jump to the label 'out' after calling extent_io_tree_panic() and set
the 'prealloc' pointer to NULL since split_state() has already freed it
when it hit an error.
Signed-off-by: Filipe Manana <fdmanana@suse.com>
Reviewed-by: David Sterba <dsterba@suse.com>
Signed-off-by: David Sterba <dsterba@suse.com>
Signed-off-by: Sasha Levin <sashal@kernel.org>
Diffstat (limited to 'drivers/usb/cdns3/cdnsp-pci.c')
0 files changed, 0 insertions, 0 deletions