Revision 61bf318eac2c13356f7bd1c6a05421ef504ccc8a authored by Sergei Trofimovich on 13 March 2021, 05:08:27 UTC, committed by Linus Torvalds on 13 March 2021, 19:27:31 UTC
In https://bugs.gentoo.org/769614 Dmitry noticed that `ptrace(PTRACE_GET_SYSCALL_INFO)` does not return error sign properly. The bug is in mismatch between get/set errors: static inline long syscall_get_error(struct task_struct *task, struct pt_regs *regs) { return regs->r10 == -1 ? regs->r8:0; } static inline long syscall_get_return_value(struct task_struct *task, struct pt_regs *regs) { return regs->r8; } static inline void syscall_set_return_value(struct task_struct *task, struct pt_regs *regs, int error, long val) { if (error) { /* error < 0, but ia64 uses > 0 return value */ regs->r8 = -error; regs->r10 = -1; } else { regs->r8 = val; regs->r10 = 0; } } Tested on v5.10 on rx3600 machine (ia64 9040 CPU). Link: https://lkml.kernel.org/r/20210221002554.333076-2-slyfox@gentoo.org Link: https://bugs.gentoo.org/769614 Signed-off-by: Sergei Trofimovich <slyfox@gentoo.org> Reported-by: Dmitry V. Levin <ldv@altlinux.org> Reviewed-by: Dmitry V. Levin <ldv@altlinux.org> Cc: John Paul Adrian Glaubitz <glaubitz@physik.fu-berlin.de> Cc: Oleg Nesterov <oleg@redhat.com> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
1 parent 0ceb1ac
File | Mode | Size |
---|---|---|
amd | ||
arm | ||
intel | ||
Kconfig | -rw-r--r-- | 11.9 KB |
Makefile | -rw-r--r-- | 1.3 KB |
dma-iommu.c | -rw-r--r-- | 38.7 KB |
exynos-iommu.c | -rw-r--r-- | 38.7 KB |
fsl_pamu.c | -rw-r--r-- | 32.9 KB |
fsl_pamu.h | -rw-r--r-- | 12.7 KB |
fsl_pamu_domain.c | -rw-r--r-- | 27.0 KB |
fsl_pamu_domain.h | -rw-r--r-- | 2.0 KB |
hyperv-iommu.c | -rw-r--r-- | 8.5 KB |
io-pgtable-arm-v7s.c | -rw-r--r-- | 27.0 KB |
io-pgtable-arm.c | -rw-r--r-- | 32.6 KB |
io-pgtable-arm.h | -rw-r--r-- | 812 bytes |
io-pgtable.c | -rw-r--r-- | 1.7 KB |
ioasid.c | -rw-r--r-- | 13.1 KB |
iommu-debugfs.c | -rw-r--r-- | 2.0 KB |
iommu-sva-lib.c | -rw-r--r-- | 2.2 KB |
iommu-sva-lib.h | -rw-r--r-- | 392 bytes |
iommu-sysfs.c | -rw-r--r-- | 3.1 KB |
iommu-traces.c | -rw-r--r-- | 669 bytes |
iommu.c | -rw-r--r-- | 81.5 KB |
iova.c | -rw-r--r-- | 25.0 KB |
ipmmu-vmsa.c | -rw-r--r-- | 30.1 KB |
irq_remapping.c | -rw-r--r-- | 3.2 KB |
irq_remapping.h | -rw-r--r-- | 1.4 KB |
msm_iommu.c | -rw-r--r-- | 19.9 KB |
msm_iommu.h | -rw-r--r-- | 2.7 KB |
msm_iommu_hw-8xxx.h | -rw-r--r-- | 73.4 KB |
mtk_iommu.c | -rw-r--r-- | 31.5 KB |
mtk_iommu.h | -rw-r--r-- | 2.4 KB |
mtk_iommu_v1.c | -rw-r--r-- | 18.4 KB |
of_iommu.c | -rw-r--r-- | 6.2 KB |
omap-iommu-debug.c | -rw-r--r-- | 5.4 KB |
omap-iommu.c | -rw-r--r-- | 41.5 KB |
omap-iommu.h | -rw-r--r-- | 7.0 KB |
omap-iopgtable.h | -rw-r--r-- | 2.7 KB |
rockchip-iommu.c | -rw-r--r-- | 34.3 KB |
s390-iommu.c | -rw-r--r-- | 9.3 KB |
sun50i-iommu.c | -rw-r--r-- | 27.3 KB |
tegra-gart.c | -rw-r--r-- | 9.1 KB |
tegra-smmu.c | -rw-r--r-- | 27.8 KB |
virtio-iommu.c | -rw-r--r-- | 28.5 KB |
Computing file changes ...