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URL: https://bugzilla.kernel.org/show_bug.cgi?id=154021
Lukas Lueg 2016-08-26 22:53:42 UTC
Created attachment 230361 [details]
Image triggering btrfsck to segv
The fuzzer hit again:
==32522==ERROR: AddressSanitizer: SEGV on unknown address 0x00027fff801c (pc
0x0000004a952e bp 0x7fff5222ce70 sp 0x7fff5222c600 T0)
#0 0x4a952d in __asan_memcpy
(/home/lukas/dev/btrfsfuzz/bin-asan/bin/btrfs+0x4a952d)
#1 0x66a323 in read_extent_buffer
/home/lukas/dev/btrfsfuzz/src-asan/extent_io.c:867:2
#2 0x55ad25 in btrfs_node_key
/home/lukas/dev/btrfsfuzz/src-asan/./ctree.h:1668:2
#3 0x58573b in check_fs_root
/home/lukas/dev/btrfsfuzz/src-asan/cmds-check.c:3748:3
#4 0x544136 in check_fs_roots
/home/lukas/dev/btrfsfuzz/src-asan/cmds-check.c:3896:10
#5 0x53d8c5 in cmd_check
/home/lukas/dev/btrfsfuzz/src-asan/cmds-check.c:11470:8
#6 0x4f105f in main /home/lukas/dev/btrfsfuzz/src-asan/btrfs.c:243:8
#7 0x7fea1bcb7730 in __libc_start_main (/lib64/libc.so.6+0x20730)
#8 0x421238 in _start
(/home/lukas/dev/btrfsfuzz/bin-asan/bin/btrfs+0x421238)
See the attached image to reproduce using btrfs-progs btrfs-progs
v4.7-42-g56e9586.
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