https://github.com/torvalds/linux
Revision bcf4dd5f9ee096bd1510f838dd4750c35df4e38b authored by Martin Schwidefsky on 27 June 2016, 15:06:45 UTC, committed by Martin Schwidefsky on 28 June 2016, 07:24:28 UTC
The test_fp_ctl function is used to test if a given value is a valid floating-point control. The inline assembly in test_fp_ctl uses an incorrect constraint for the 'orig_fpc' variable. If the compiler chooses the same register for 'fpc' and 'orig_fpc' the test_fp_ctl() function always returns true. This allows user space to trigger kernel oopses with invalid floating-point control values on the signal stack. This problem has been introduced with git commit 4725c86055f5bbdcdf "s390: fix save and restore of the floating-point-control register" Cc: stable@vger.kernel.org # v3.13+ Reviewed-by: Heiko Carstens <heiko.carstens@de.ibm.com> Signed-off-by: Martin Schwidefsky <schwidefsky@de.ibm.com>
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Tip revision: bcf4dd5f9ee096bd1510f838dd4750c35df4e38b authored by Martin Schwidefsky on 27 June 2016, 15:06:45 UTC
s390: fix test_fp_ctl inline assembly contraints
s390: fix test_fp_ctl inline assembly contraints
Tip revision: bcf4dd5
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| init | ||
| ipc | ||
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| .get_maintainer.ignore | -rw-r--r-- | 31 bytes |
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| CREDITS | -rw-r--r-- | 95.5 KB |
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| MAINTAINERS | -rw-r--r-- | 353.8 KB |
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