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cifs: Fix use-after-free in SMB2_write
There is a KASAN use-after-free: BUG: KASAN: use-after-free in SMB2_write+0x1342/0x1580 Read of size 8 at addr ffff8880b6a8e450 by task ln/4196 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 <email@example.com> Signed-off-by: Steve French <firstname.lastname@example.org> CC: Stable <email@example.com> 4.18+ Reviewed-by: Pavel Shilovsky <firstname.lastname@example.org>
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