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4ee7588bbb
Cover the inverted range: - with plain close the window stays and everything outside of it goes, stdio included - a window at the top, one that cannot hold a descriptor and one of a single descriptor keep just what they name, and so does the unshare form on a table that is not shared - with CLOSE_RANGE_CLOEXEC everything outside of the window is marked and the window is not, in place and in a clone, for a window in the middle, at the bottom, at the top and above the table - with CLOSE_RANGE_UNSHARE the table the child cloned from is untouched, a window near the top of the table comes back whole, one at the bottom keeps stdio, one that cannot hold a descriptor keeps nothing, and the slots left behind are handed out again from the bottom - the bounds are checked before the range is turned around The extra cases came out of walking the window positions that __range_close(), __range_cloexec() and dup_fd() tell apart: at the bottom, in the middle, at the top, above the table, a single descriptor and none, on a shared and on a private table. Link: https://patch.msgid.link/20260921-work-file-close_range_except-v1-7-c20d0b49270d@kernel.org Reviewed-by: Jann Horn <jannh@google.com> Signed-off-by: Christian Brauner (Amutable) <brauner@kernel.org> |
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| accounting | ||
| arch | ||
| bootconfig | ||
| bpf | ||
| build | ||
| certs | ||
| cgroup | ||
| counter | ||
| crypto | ||
| debugging | ||
| dma | ||
| docs | ||
| firewire | ||
| firmware | ||
| gpio | ||
| hv | ||
| iio | ||
| include | ||
| kvm/kvm_stat | ||
| laptop | ||
| leds | ||
| lib | ||
| memory-model | ||
| mm | ||
| net | ||
| objtool | ||
| pcmcia | ||
| perf | ||
| platform/x86/amd | ||
| power | ||
| rcu | ||
| sched | ||
| sched_ext | ||
| scripts | ||
| sound | ||
| spi | ||
| testing | ||
| thermal | ||
| time | ||
| tracing | ||
| unittests | ||
| usb | ||
| verification | ||
| virtio | ||
| wmi | ||
| workqueue | ||
| writeback | ||
| Makefile | ||