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cifs: Fix use-after-free in SMB2_read
There is a KASAN use-after-free: BUG: KASAN: use-after-free in SMB2_read+0x1136/0x1190 Read of size 8 at addr ffff8880b4e45e50 by task ln/1009 Should not release the 'req' because it will use in the trace. Fixes: eccb442 ("smb3: Add ftrace tracepoints for improved SMB3 debugging") Signed-off-by: ZhangXiaoxu <firstname.lastname@example.org> Signed-off-by: Steve French <email@example.com> CC: Stable <firstname.lastname@example.org> 4.18+ Reviewed-by: Pavel Shilovsky <email@example.com>
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