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5d119b2c9a
pointed out by pageexec@freemail.hu: > what happens here is that gcc treats the argument area as owned by the > callee, not the caller and is allowed to do certain tricks. for ssp it > will make a copy of the struct passed by value into the local variable > area and pass *its* address down, and it won't copy it back into the > original instance stored in the argument area. > > so once sys_execve returns, the pt_regs passed by value hasn't at all > changed and its default content will cause a nice double fault (FWIW, > this part took me the longest to debug, being down with cold didn't > help it either ;). To fix this we pass in pt_regs by pointer. Signed-off-by: Ingo Molnar <mingo@elte.hu> Signed-off-by: Thomas Gleixner <tglx@linutronix.de> |
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