197390 2019-04-29 15:11:27 -0700 Add assertion to check whether shm files have maximum FileProtection of CompleteUnlessOpen 2021-02-17 11:24:40 -0800 1 1 1 Unclassified WebKit New Bugs WebKit Nightly Build Unspecified Unspecified RESOLVED FIXED https://bugs.webkit.org/show_bug.cgi?id=222054 InRadar P2 Normal --- 1 sihui_liu sihui_liu achristensen benjamin cdumez cgarcia cmarcelo commit-queue dbates ews-watchlist ggaren koivisto webkit-bug-importer oldest_to_newest 1531323 0 sihui_liu 2019-04-29 15:11:27 -0700 We have seen crashes where process gets killed because it tries accessing shm file after device is locked. We are suspecting this is because database protection class of shm file is set to be Complete by apps after it's created with lower protection level. 1531324 1 sihui_liu 2019-04-29 15:15:08 -0700 <rdar://problem/42685773> 1531339 2 368502 sihui_liu 2019-04-29 15:29:23 -0700 Created attachment 368502 Patch 1531358 3 368502 achristensen 2019-04-29 16:16:51 -0700 Comment on attachment 368502 Patch View in context: https://bugs.webkit.org/attachment.cgi?id=368502&action=review > Source/WebCore/platform/sql/SQLiteDatabase.cpp:154 > + RELEASE_ASSERT(FileSystem::isSafeToUseMemoryMapForPath(shmFileName)); Why not just call makeSafeToUseMemoryMapForPath? 1531392 4 sihui_liu 2019-04-29 17:48:55 -0700 (In reply to Alex Christensen from comment #3) > Comment on attachment 368502 [details] > Patch > > View in context: > https://bugs.webkit.org/attachment.cgi?id=368502&action=review > > > Source/WebCore/platform/sql/SQLiteDatabase.cpp:154 > > + RELEASE_ASSERT(FileSystem::isSafeToUseMemoryMapForPath(shmFileName)); > > Why not just call makeSafeToUseMemoryMapForPath? If the crash is caused by the shm file being unsafe for mmap, we probably need change in sqlite instead of WebKit to ensure shm file is in correct protection class when the file is being used. 1532410 5 368502 ggaren 2019-05-02 13:23:43 -0700 Comment on attachment 368502 Patch r=me 1532967 6 368502 commit-queue 2019-05-03 14:24:11 -0700 Comment on attachment 368502 Patch Clearing flags on attachment: 368502 Committed r244921: <https://trac.webkit.org/changeset/244921> 1532968 7 commit-queue 2019-05-03 14:24:13 -0700 All reviewed patches have been landed. Closing bug. 368502 2019-04-29 15:29:23 -0700 2019-05-03 14:24:11 -0700 Patch bug-197390-20190429152922.patch text/plain 13493 sihui_liu U3VidmVyc2lvbiBSZXZpc2lvbjogMjQ0NzM1CmRpZmYgLS1naXQgYS9Tb3VyY2UvV1RGL0NoYW5n ZUxvZyBiL1NvdXJjZS9XVEYvQ2hhbmdlTG9nCmluZGV4IDQ3NWNkZDI4Yjc0Y2Y2YzE5MjUxODUx ZTc1ZGU5YzI3OWFlYmQxMTYuLmJjMmFjNjZjMzVjOGU4NDE3MWE3MGY2YzE5M2Y3NzE3YzA2OTU3 NmMgMTAwNjQ0Ci0tLSBhL1NvdXJjZS9XVEYvQ2hhbmdlTG9nCisrKyBiL1NvdXJjZS9XVEYvQ2hh bmdlTG9nCkBAIC0xLDMgKzEsMTkgQEAKKzIwMTktMDQtMjkgIFNpaHVpIExpdSAgPHNpaHVpX2xp dUBhcHBsZS5jb20+CisKKyAgICAgICAgQWRkIGFzc2VydGlvbiB0byBjaGVjayB3aGV0aGVyIHNo bSBmaWxlcyBoYXZlIG1heGltdW0gRmlsZVByb3RlY3Rpb24gb2YgQ29tcGxldGVVbmxlc3NPcGVu CisgICAgICAgIGh0dHBzOi8vYnVncy53ZWJraXQub3JnL3Nob3dfYnVnLmNnaT9pZD0xOTczOTAK KyAgICAgICAgPHJkYXI6Ly9wcm9ibGVtLzQyNjg1NzczPgorCisgICAgICAgIFJldmlld2VkIGJ5 IE5PQk9EWSAoT09QUyEpLgorCisgICAgICAgICogd3RmL0ZpbGVTeXN0ZW0uY3BwOgorICAgICAg ICAoV1RGOjpGaWxlU3lzdGVtSW1wbDo6aXNTYWZlVG9Vc2VNZW1vcnlNYXBGb3JQYXRoKToKKyAg 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