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2019-07-16proc: test /proc/sysvipc vs setns(CLONE_NEWIPC)Alexey Dobriyan3-0/+135
I thought that /proc/sysvipc has the same bug as /proc/net commit 1fde6f21d90f8ba5da3cb9c54ca991ed72696c43 proc: fix /proc/net/* after setns(2) However, it doesn't! /proc/sysvipc files do get_ipc_ns(current->nsproxy->ipc_ns); in their open() hook and avoid the problem. Keep the test, maybe /proc/sysvipc will become broken someday :-\ Link: http://lkml.kernel.org/r/20190706180146.GA21015@avx2 Signed-off-by: Alexey Dobriyan <[email protected]> Signed-off-by: Andrew Morton <[email protected]> Signed-off-by: Linus Torvalds <[email protected]>
2019-07-16tools/testing/selftests/proc/proc-pid-vm.c: hide "segfault at ↵Alexey Dobriyan1-2/+15
ffffffffff600000" dmesg spam Test tries to access vsyscall page and if it doesn't exist gets SIGSEGV which can spam into dmesg. However the segfault happens by design. Handle it and carry information via exit code to parent. Link: http://lkml.kernel.org/r/20190524181256.GA2260@avx2 Signed-off-by: Alexey Dobriyan <[email protected]> Signed-off-by: Andrew Morton <[email protected]> Signed-off-by: Linus Torvalds <[email protected]>
2019-05-21treewide: Add SPDX license identifier - Makefile/KconfigThomas Gleixner1-0/+1
Add SPDX license identifiers to all Make/Kconfig files which: - Have no license information of any form These files fall under the project license, GPL v2 only. The resulting SPDX license identifier is: GPL-2.0-only Signed-off-by: Thomas Gleixner <[email protected]> Signed-off-by: Greg Kroah-Hartman <[email protected]>
2019-04-19proc: fixup proc-pid-vm testAlexey Dobriyan1-2/+2
Silly sizeof(pointer) vs sizeof(uint8_t[]) bug. Link: http://lkml.kernel.org/r/20190414123009.GA12971@avx2 Fixes: e483b0208784 ("proc: test /proc/*/maps, smaps, smaps_rollup, statm") Signed-off-by: Alexey Dobriyan <[email protected]> Signed-off-by: Andrew Morton <[email protected]> Signed-off-by: Linus Torvalds <[email protected]>
2019-04-19proc: fix map_files test on F29Alexey Dobriyan1-10/+10
F29 bans mapping first 64KB even for root making test fail. Iterate from address 0 until mmap() works. Gentoo (root): openat(AT_FDCWD, "/dev/zero", O_RDONLY) = 3 mmap(NULL, 4096, PROT_NONE, MAP_PRIVATE|MAP_FIXED, 3, 0) = 0 Gentoo (non-root): openat(AT_FDCWD, "/dev/zero", O_RDONLY) = 3 mmap(NULL, 4096, PROT_NONE, MAP_PRIVATE|MAP_FIXED, 3, 0) = -1 EPERM (Operation not permitted) mmap(0x1000, 4096, PROT_NONE, MAP_PRIVATE|MAP_FIXED, 3, 0) = 0x1000 F29 (root): openat(AT_FDCWD, "/dev/zero", O_RDONLY) = 3 mmap(NULL, 4096, PROT_NONE, MAP_PRIVATE|MAP_FIXED, 3, 0) = -1 EACCES (Permission denied) mmap(0x1000, 4096, PROT_NONE, MAP_PRIVATE|MAP_FIXED, 3, 0) = -1 EACCES (Permission denied) mmap(0x2000, 4096, PROT_NONE, MAP_PRIVATE|MAP_FIXED, 3, 0) = -1 EACCES (Permission denied) mmap(0x3000, 4096, PROT_NONE, MAP_PRIVATE|MAP_FIXED, 3, 0) = -1 EACCES (Permission denied) mmap(0x4000, 4096, PROT_NONE, MAP_PRIVATE|MAP_FIXED, 3, 0) = -1 EACCES (Permission denied) mmap(0x5000, 4096, PROT_NONE, MAP_PRIVATE|MAP_FIXED, 3, 0) = -1 EACCES (Permission denied) mmap(0x6000, 4096, PROT_NONE, MAP_PRIVATE|MAP_FIXED, 3, 0) = -1 EACCES (Permission denied) mmap(0x7000, 4096, PROT_NONE, MAP_PRIVATE|MAP_FIXED, 3, 0) = -1 EACCES (Permission denied) mmap(0x8000, 4096, PROT_NONE, MAP_PRIVATE|MAP_FIXED, 3, 0) = -1 EACCES (Permission denied) mmap(0x9000, 4096, PROT_NONE, MAP_PRIVATE|MAP_FIXED, 3, 0) = -1 EACCES (Permission denied) mmap(0xa000, 4096, PROT_NONE, MAP_PRIVATE|MAP_FIXED, 3, 0) = -1 EACCES (Permission denied) mmap(0xb000, 4096, PROT_NONE, MAP_PRIVATE|MAP_FIXED, 3, 0) = -1 EACCES (Permission denied) mmap(0xc000, 4096, PROT_NONE, MAP_PRIVATE|MAP_FIXED, 3, 0) = -1 EACCES (Permission denied) mmap(0xd000, 4096, PROT_NONE, MAP_PRIVATE|MAP_FIXED, 3, 0) = -1 EACCES (Permission denied) mmap(0xe000, 4096, PROT_NONE, MAP_PRIVATE|MAP_FIXED, 3, 0) = -1 EACCES (Permission denied) mmap(0xf000, 4096, PROT_NONE, MAP_PRIVATE|MAP_FIXED, 3, 0) = -1 EACCES (Permission denied) mmap(0x10000, 4096, PROT_NONE, MAP_PRIVATE|MAP_FIXED, 3, 0) = 0x10000 Now all proc tests succeed on F29 if run as root, at last! Link: http://lkml.kernel.org/r/20190414123612.GB12971@avx2 Signed-off-by: Alexey Dobriyan <[email protected]> Cc: Randy Dunlap <[email protected]> Signed-off-by: Andrew Morton <[email protected]> Signed-off-by: Linus Torvalds <[email protected]>
2019-03-14tools/testing/selftests/proc/proc-pid-vm.c: test with vsyscall in mindAlexey Dobriyan1-3/+46
: selftests: proc: proc-pid-vm : ======================================== : proc-pid-vm: proc-pid-vm.c:277: main: Assertion `rv == strlen(buf0)' failed. : Aborted Because the vsyscall mapping is enabled. Read from vsyscall page to tell if vsyscall is being used. Link: http://lkml.kernel.org/r/20190307183204.GA11405@avx2 Link: http://lkml.kernel.org/r/20190219094722.GB28258@shao2-debian Fixes: 34aab6bec23e7e9 ("proc: test /proc/*/maps, smaps, smaps_rollup, statm") Signed-off-by: Alexey Dobriyan <[email protected]> Reported-by: kernel test robot <[email protected]> Cc: Shuah Khan <[email protected]> Signed-off-by: Andrew Morton <[email protected]> Signed-off-by: Linus Torvalds <[email protected]>
2019-03-05tools/testing/selftests/proc/proc-self-syscall.c: remove duplicate includeSouptick Joarder1-1/+0
Remove duplicate header which is included twice. Link: http://lkml.kernel.org/r/20190304182719.GA6606@jordon-HP-15-Notebook-PC Signed-off-by: Sabyasachi Gupta <[email protected]> Signed-off-by: Souptick Joarder <[email protected]> Reviewed-by: Andrew Morton <[email protected]> Signed-off-by: Andrew Morton <[email protected]> Signed-off-by: Linus Torvalds <[email protected]>
2019-03-05proc: more robust bulk read testAlexey Dobriyan1-0/+14
/proc may not be mounted and test will exit successfully. Ensure proc is mounted at /proc. Link: http://lkml.kernel.org/r/20190209105613.GA10384@avx2 Signed-off-by: Alexey Dobriyan <[email protected]> Signed-off-by: Andrew Morton <[email protected]> Signed-off-by: Linus Torvalds <[email protected]>
2019-03-05proc: test /proc/*/maps, smaps, smaps_rollup, statmAlexey Dobriyan3-0/+408
Start testing VM related fiels found in per-process files. Do it by jiting small executable which brings its address space to precisely known state, then comparing /proc/*/maps, smaps, smaps_rollup, and statm files to expected values. Currently only x86_64 is supported. [[email protected]: exit correctly in /proc/*/maps test] Link: http://lkml.kernel.org/r/20190206073659.GB15311@avx2 Link: http://lkml.kernel.org/r/20190203165806.GA14568@avx2 Signed-off-by: Alexey Dobriyan <[email protected]> Cc: Shuah Khan <[email protected]> Signed-off-by: Andrew Morton <[email protected]> Signed-off-by: Linus Torvalds <[email protected]>
2019-03-05proc: return exit code 4 for skipped testsAlexey Dobriyan5-5/+5
Test harness uses 4 for SKIP, not 2. Link: http://lkml.kernel.org/r/20190108193108.GA12259@avx2 Signed-off-by: Alexey Dobriyan <[email protected]> Cc: Shuah Khan <[email protected]> Signed-off-by: Andrew Morton <[email protected]> Signed-off-by: Linus Torvalds <[email protected]>
2019-02-01proc: fix /proc/net/* after setns(2)Alexey Dobriyan3-0/+131
/proc entries under /proc/net/* can't be cached into dcache because setns(2) can change current net namespace. [[email protected]: coding-style fixes] [[email protected]: avoid vim miscolorization] [[email protected]: write test, add dummy ->d_revalidate hook: necessary if /proc/net/* is pinned at setns time] Link: http://lkml.kernel.org/r/20190108192350.GA12034@avx2 Link: http://lkml.kernel.org/r/20190107162336.GA9239@avx2 Fixes: 1da4d377f943fe4194ffb9fb9c26cc58fad4dd24 ("proc: revalidate misc dentries") Signed-off-by: Alexey Dobriyan <[email protected]> Reported-by: Mateusz Stępień <[email protected]> Reported-by: Ahmad Fatoum <[email protected]> Cc: Al Viro <[email protected]> Signed-off-by: Andrew Morton <[email protected]> Signed-off-by: Linus Torvalds <[email protected]>
2018-11-30proc: fixup map_files test on armAlexey Dobriyan1-2/+7
https://bugs.linaro.org/show_bug.cgi?id=3782 Turns out arm doesn't permit mapping address 0, so try minimum virtual address instead. Link: http://lkml.kernel.org/r/20181113165446.GA28157@avx2 Signed-off-by: Alexey Dobriyan <[email protected]> Reported-by: Rafael David Tinoco <[email protected]> Tested-by: Rafael David Tinoco <[email protected]> Acked-by: Cyrill Gorcunov <[email protected]> Cc: Shuah Khan <[email protected]> Signed-off-by: Andrew Morton <[email protected]> Signed-off-by: Linus Torvalds <[email protected]>
2018-10-24selftests: fix warning: "_GNU_SOURCE" redefinedPeng Hao2-2/+2
Makefile contains -D_GNU_SOURCE. remove define "_GNU_SOURCE" in c files. Signed-off-by: Peng Hao <[email protected]> Signed-off-by: Shuah Khan (Samsung OSG) <[email protected]>
2018-08-22proc: test /proc/thread-self symlinkAlexey Dobriyan4-0/+71
Same story: I have WIP patch to make it faster, so better have a test as well. Link: http://lkml.kernel.org/r/20180627195209.GC18113@avx2 Signed-off-by: Alexey Dobriyan <[email protected]> Cc: Shuah Khan <[email protected]> Signed-off-by: Andrew Morton <[email protected]> Signed-off-by: Linus Torvalds <[email protected]>
2018-08-22proc: test /proc/self symlinkAlexey Dobriyan4-0/+49
There are plans to change how /proc/self result is calculated, for that a test is necessary. Use direct system call because of this whole getpid caching story. Link: http://lkml.kernel.org/r/20180627195103.GB18113@avx2 Signed-off-by: Alexey Dobriyan <[email protected]> Cc: Shuah Khan <[email protected]> Signed-off-by: Andrew Morton <[email protected]> Signed-off-by: Linus Torvalds <[email protected]>
2018-06-07tools/testing/selftests/proc: test /proc/*/fd a bit (+ PF_KTHREAD is ABI!)Alexey Dobriyan8-32/+451
* Test lookup in /proc/self/fd. "map_files" lookup story showed that lookup is not that simple. * Test that all those symlinks open the same file. Check with (st_dev, st_info). * Test that kernel threads do not have anything in their /proc/*/fd/ directory. Now this is where things get interesting. First, kernel threads aren't pinned by /proc/self or equivalent, thus some "atomicity" is required. Second, ->comm can contain whitespace and ')'. No, they are not escaped. Third, the only reliable way to check if process is kernel thread appears to be field #9 in /proc/*/stat. This field is struct task_struct::flags in decimal! Check is done by testing PF_KTHREAD flags like we do in kernel. PF_KTREAD value is a part of userspace ABI !!! Other methods for determining kernel threadness are not reliable: * RSS can be 0 if everything is swapped, even while reading from /proc/self. * ->total_vm CAN BE ZERO if process is finishing munmap(NULL, whole address space); * /proc/*/maps and similar files can be empty because unmapping everything works. Read returning 0 can't distinguish between kernel thread and such suicide process. Link: http://lkml.kernel.org/r/20180505000414.GA15090@avx2 Signed-off-by: Alexey Dobriyan <[email protected]> Signed-off-by: Andrew Morton <[email protected]> Signed-off-by: Linus Torvalds <[email protected]>
2018-04-12proc: fixup copyright signAlexey Dobriyan9-7/+37
Add copyright in two files before they get autorubberstamped. Signed-off-by: Alexey Dobriyan <[email protected]> Signed-off-by: Linus Torvalds <[email protected]>
2018-04-11proc: selftests: test /proc/uptimeAlexey Dobriyan5-0/+202
The only tests I could come up with for /proc/uptime are: - test that values increase monotonically for 1 second, - bounce around CPUs and test the same thing. Avoid glibc like plague for affinity given patches like this: https://marc.info/?l=linux-kernel&m=152130031912594&w=4 Link: http://lkml.kernel.org/r/20180317165235.GB3445@avx2 Signed-off-by: Alexey Dobriyan <[email protected]> Cc: Shuah Khan <[email protected]> Signed-off-by: Andrew Morton <[email protected]> Signed-off-by: Linus Torvalds <[email protected]>
2018-04-11proc: selftests: shotgun testing of read/readdir/readlink/writeAlexey Dobriyan3-0/+149
Perform reads with nearly everything in /proc, and some writing as well. Hopefully memleak checkers and KASAN will find something. [[email protected]: /proc/kmsg can and will block if read under root] Link: http://lkml.kernel.org/r/20180316232147.GA20146@avx2 Signed-off-by: Alexey Dobriyan <[email protected]> [[email protected]: /proc/sysrq-trigger lives on the ground floor] Link: http://lkml.kernel.org/r/20180317164911.GA3445@avx2 Link: http://lkml.kernel.org/r/20180315201251.GA12396@avx2 Signed-off-by: Alexey Dobriyan <[email protected]> Signed-off-by: Andrew Morton <[email protected]> Signed-off-by: Linus Torvalds <[email protected]>
2018-04-11proc: add selftest for last field of /proc/loadavgAlexey Dobriyan3-0/+85
Test fork counter formerly known as ->last_pid, the only part of /proc/loadavg which can be tested. Testing in init pid namespace is not reliable because of background activity. Link: http://lkml.kernel.org/r/20180311152241.GA26247@avx2 Signed-off-by: Alexey Dobriyan <[email protected]> Cc: Shuah Khan <[email protected]> Signed-off-by: Andrew Morton <[email protected]> Signed-off-by: Linus Torvalds <[email protected]>
2018-04-11proc: fix /proc/*/map_files lookup some moreAlexey Dobriyan4-1/+172
I totally forgot that _parse_integer() accepts arbitrary amount of leading zeroes leading to the following lookups: OK # readlink /proc/1/map_files/56427ecba000-56427eddc000 /lib/systemd/systemd bogus # readlink /proc/1/map_files/00000000000056427ecba000-56427eddc000 /lib/systemd/systemd # readlink /proc/1/map_files/56427ecba000-00000000000056427eddc000 /lib/systemd/systemd Link: http://lkml.kernel.org/r/20180303215130.GA23480@avx2 Signed-off-by: Alexey Dobriyan <[email protected]> Reviewed-by: Cyrill Gorcunov <[email protected]> Reviewed-by: Andrew Morton <[email protected]> Cc: Pavel Emelyanov <[email protected]> Signed-off-by: Andrew Morton <[email protected]> Signed-off-by: Linus Torvalds <[email protected]>
2018-04-11proc: test /proc/self/syscallAlexey Dobriyan3-1/+48
Read from /proc/self/syscall should yield read system call and correct args in the output as current is reading /proc/self/syscall. Link: http://lkml.kernel.org/r/20180226212145.GB742@avx2 Signed-off-by: Alexey Dobriyan <[email protected]> Cc: Shuah Khan <[email protected]> Signed-off-by: Andrew Morton <[email protected]> Signed-off-by: Linus Torvalds <[email protected]>
2018-04-11proc: test /proc/self/wchanAlexey Dobriyan4-0/+33
This patch starts testing /proc. Many more tests to come (I promise). Read from /proc/self/wchan should always return "0" as current is in TASK_RUNNING state while reading /proc/self/wchan. Link: http://lkml.kernel.org/r/20180226212006.GA742@avx2 Signed-off-by: Alexey Dobriyan <[email protected]> Cc: Shuah Khan <[email protected]> Signed-off-by: Andrew Morton <[email protected]> Signed-off-by: Linus Torvalds <[email protected]>
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