Opened 2 years ago
Last modified 2 years ago
#17895 closed bug
mprotect ineffective after fork — at Version 1
| Reported by: | korli | Owned by: | nobody |
|---|---|---|---|
| Priority: | normal | Milestone: | R1/beta4 |
| Component: | System/Kernel | Version: | R1/beta3 |
| Keywords: | Cc: | ||
| Blocked By: | Blocking: | ||
| Platform: | All |
Description (last modified by )
I took a few tests from libhugetlbfs, combined them in fork-mprotect-cow to check the page protection after fork. this actually succeeds on Linux and fails on Haiku.
Test output on Linux
Starting testcase "./fork-mprotect-cow", pid 15944 Mapping synchronization area..done Mapping hugepage area...mapped at 0x7f59034f2000 Parent writes pre-fork...1234abcd mprotect()ing to prot=0 Parent reading..SIGSEGV at 0x7f59034f2000 (sig_expected=0x7f59034f2000) -1 Child starts.. Child reading..SIGSEGV at 0x7f59034f2000 (sig_expected=0x7f59034f2000) -1 Child exits... PASS
Change History (4)
by , 2 years ago
| Attachment: | fork-mprotect-cow.c added |
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by , 2 years ago
| Attachment: | testutils.c added |
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by , 2 years ago
| Attachment: | hugetests.h added |
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comment:1 by , 2 years ago
| Description: | modified (diff) |
|---|
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