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- don't reboot() when feed with wrong parameters (and enough permissions) [1]

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- add support to power off the system [2]
- check the linux magic values [3]

Submitted by:	Marcin Cieslak <saper@SYSTEM.PL> [1,2]
Modelled after:	linux man page of the reboot() syscall [3]
Found by:	LTP testcase "reboot02" [1]
Tested with:	LTP testcase "reboot02" [1,3]
MFC after:	1 week
This commit is contained in:
Alexander Leidinger 2006-09-16 14:12:04 +00:00
parent f8aa16c66c
commit 18f81b3dfa
Notes: svn2git 2020-12-20 02:59:44 +00:00 
svn path=/head/; revision=162358
1 changed files with 38 additions and 4 deletions
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42
sys/compat/linux/linux_misc.c
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@ -1299,6 +1299,13 @@ linux_sched_get_priority_min(struct thread *td,
#define REBOOT_CAD_ON 0x89abcdef
#define REBOOT_CAD_OFF 0
#define REBOOT_HALT 0xcdef0123
#define REBOOT_RESTART 0x01234567
#define REBOOT_RESTART2 0xA1B2C3D4
#define REBOOT_POWEROFF 0x4321FEDC
#define REBOOT_MAGIC1 0xfee1dead
#define REBOOT_MAGIC2 0x28121969
#define REBOOT_MAGIC2A 0x05121996
#define REBOOT_MAGIC2B 0x16041998
int
linux_reboot(struct thread *td, struct linux_reboot_args *args)
@ -1309,10 +1316,37 @@ linux_reboot(struct thread *td, struct linux_reboot_args *args)
if (ldebug(reboot))
printf(ARGS(reboot, "0x%x"), args->cmd);
#endif
if (args->cmd == REBOOT_CAD_ON || args->cmd == REBOOT_CAD_OFF)
return (0);
bsd_args.opt = (args->cmd == REBOOT_HALT) ? RB_HALT : 0;
return (reboot(td, &bsd_args));
if (args->magic1 != REBOOT_MAGIC1)
return EINVAL;
switch (args->magic2) {
case REBOOT_MAGIC2:
case REBOOT_MAGIC2A:
case REBOOT_MAGIC2B:
break;
default:
return EINVAL;
}
switch (args->cmd) {
case REBOOT_CAD_ON:
case REBOOT_CAD_OFF:
return suser(td);
case REBOOT_HALT:
bsd_args.opt = RB_HALT;
break;
case REBOOT_RESTART:
case REBOOT_RESTART2:
bsd_args.opt = 0;
break;
case REBOOT_POWEROFF:
bsd_args.opt = RB_POWEROFF;
break;
default:
return EINVAL;
}
return reboot(td, &bsd_args);
}