Running fsck.hfsplus on a device produces a segfault. Reproducible: Always Steps to Reproduce: 1. # mkfs.hfsplus /dev/sdc1 Initialized /dev/sdc1 as a 100 MB HFS Plus volume 2. # fsck.hfsplus /dev/sdc1 ** /dev/sdc1 ** Checking HFS Plus volume. Segmentation fault Actual Results: Not a segfault Expected Results: segfault This works on my non-hardened system.
Created attachment 304235 [details] emerge --info
> Actual Results: > Not a segfault > > Expected Results: > segfault > > This works on my non-hardened system. Of course, I have Actual and Expected switched.
Do you have relevant dmesg output, and could you run it through gdb to get a proper backtrace?
(In reply to comment #3) > Do you have relevant dmesg output, and could you run it through gdb to get a > proper backtrace? I'm new to this. But here is the line is dmesg: [240364.497744] fsck_hfs[16989]: segfault at 3b2cfe70 ip 000000603b07714b sp 000003fc2e415a50 error 6 in fsck_hfs[603b06d000+2f000] and this is what I get following the procedure at http://www.gentoo.org/proj/en/qa/backtraces.xml Starting program: /sbin/fsck_hfs /dev/sdc2 warning: no loadable sections found in added symbol-file system-supplied DSO at 0x36a4d8b1000 Program received signal SIGSEGV, Segmentation fault. 0x0000003016b1114b in CreateExtentsBTreeControlBlock (GPtr=<optimized out>) at SVerify1.c:786 786 SVerify1.c: No such file or directory. in SVerify1.c As you can see from my emerge --info I had the system built with -fomit-frame-pointer. I removed that flag and added -ggdb and FEATURES=splitdebug. Then I rebuild diskdev_cmds and glibc before running gdb as above. Should I rebuild world and do it again?
Not sure what happened, but now it gives a different response in gdb: $ gdb /sbin/fsck_hfs GNU gdb (Gentoo 7.3.1 p2) 7.3.1 Copyright (C) 2011 Free Software Foundation, Inc. License GPLv3+: GNU GPL version 3 or later <http://gnu.org/licenses/gpl.html> This is free software: you are free to change and redistribute it. There is NO WARRANTY, to the extent permitted by law. Type "show copying" and "show warranty" for details. This GDB was configured as "x86_64-pc-linux-gnu". For bug reporting instructions, please see: <http://bugs.gentoo.org/>... Reading symbols from /sbin/fsck_hfs...Reading symbols from /usr/lib64/debug/sbin/fsck_hfs.debug...done. done. (gdb) set logging file backtrace.log (gdb) set logging on Copying output to backtrace.log. (gdb) set args local.disk (gdb) run Starting program: /sbin/fsck_hfs local.disk ** local.disk ** Checking HFS Plus volume. Program received signal SIGSEGV, Segmentation fault. 0x000002aaaaab414b in CreateExtentsBTreeControlBlock (GPtr=<optimized out>) at SVerify1.c:786 786 ((BTreeExtensionsRec*)btcb->refCon)->BTCBMPtr = AllocateClearMemory(size); // get precleared bitmap (gdb) set logging off Done logging to backtrace.log. (gdb) quit
Ok, sorry for so many comments, but I'm learing about using gdb like this. # gdb /sbin/fsck_hfs GNU gdb (Gentoo 7.3.1 p2) 7.3.1 Copyright (C) 2011 Free Software Foundation, Inc. License GPLv3+: GNU GPL version 3 or later <http://gnu.org/licenses/gpl.html> This is free software: you are free to change and redistribute it. There is NO WARRANTY, to the extent permitted by law. Type "show copying" and "show warranty" for details. This GDB was configured as "x86_64-pc-linux-gnu". For bug reporting instructions, please see: <http://bugs.gentoo.org/>... Reading symbols from /sbin/fsck_hfs...Reading symbols from /usr/lib64/debug/sbin/fsck_hfs.debug...done. done. (gdb) set logging file backtrace.log (gdb) set logging on Copying output to backtrace.log. (gdb) set args /dev/sdb2 (gdb) run Starting program: /sbin/fsck_hfs /dev/sdb2 warning: no loadable sections found in added symbol-file system-supplied DSO at 0x3fff7ffa000 ** /dev/sdb2 ** Checking HFS Plus volume. Program received signal SIGSEGV, Segmentation fault. 0x000002aaaaab3280 in CreateExtentsBTreeControlBlock (GPtr=0x3ffffffc310) at SVerify1.c:786 786 ((BTreeExtensionsRec*)btcb->refCon)->BTCBMPtr = AllocateClearMemory(size); // get precleared bitmap (gdb) bt #0 0x000002aaaaab3280 in CreateExtentsBTreeControlBlock (GPtr=0x3ffffffc310) at SVerify1.c:786 #1 0x000002aaaaab08f3 in ScavCtrl (GPtr=0x3ffffffc310, ScavOp=2, ScavRes=0x3ffffffc308) at SControl.c:391 #2 0x000002aaaaab0270 in CheckHFS (fsReadRef=8, fsWriteRef=9, checkLevel=2, repairLevel=2, logLevel=2, guiControl=0, lostAndFoundMode=0, canWrite=1, modified=0x2aaaaceaea0) at SControl.c:145 #3 0x000002aaaaaad6c4 in checkfilesys (filesys=0x3ffffffdb8f "/dev/sdb2") at fsck_hfs.c:297 #4 0x000002aaaaaad475 in main (argc=0, argv=0x3ffffffd928) at fsck_hfs.c:191 (gdb) quit
