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authorChristian Krinitsin <mail@krinitsin.com>2025-05-30 14:51:13 +0000
committerChristian Krinitsin <mail@krinitsin.com>2025-05-30 14:51:13 +0000
commit225caa38269323af1bfc2daadff5ec8bd930747f (patch)
treee0a5fefde9ee100ba6f32fb36de6707490e4164e /mailinglist/output_launchpad/1840865
parent904141bfb8d5385b75eb3b7afec1dcda89af65a7 (diff)
downloademulator-bug-study-225caa38269323af1bfc2daadff5ec8bd930747f.tar.gz
emulator-bug-study-225caa38269323af1bfc2daadff5ec8bd930747f.zip
add mailinglist scraper results
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+qemu crashes when doing iotest on virtio-9p filesystem
+
+Qemu crashes when doing avocado-vt test on virtio-9p filesystem.
+This bug can be reproduced running https://github.com/autotest/tp-qemu/blob/master/qemu/tests/9p.py.
+The crash stack goes like:
+
+Program terminated with signal SIGSEGV, Segmentation fault.
+#0 v9fs_mark_fids_unreclaim (pdu=pdu@entry=0xaaab00046868, path=path@entry=0xffff851e2fa8)
+ at hw/9pfs/9p.c:505
+#1 0x0000aaaae3585acc in v9fs_unlinkat (opaque=0xaaab00046868) at hw/9pfs/9p.c:2590
+#2 0x0000aaaae3811c10 in coroutine_trampoline (i0=<optimized out>, i1=<optimized out>)
+ at util/coroutine-ucontext.c:116
+#3 0x0000ffffa13ddb20 in ?? () from /lib64/libc.so.6
+Backtrace stopped: not enough registers or memory available to unwind further
+
+A segment fault is triggered at hw/9pfs/9p.c line 505
+
+ for (fidp = s->fid_list; fidp; fidp = fidp->next) {
+ if (fidp->path.size != path->size) { # fidp is invalid
+ continue;
+ }
+
+(gdb) p path
+$10 = (V9fsPath *) 0xffff851e2fa8
+(gdb) p *path
+$11 = {size = 21, data = 0xaaaafed6f420 "./9p_test/p2a1/d0/f1"}
+(gdb) p *fidp
+Cannot access memory at address 0x101010101010101
+(gdb) p *pdu
+$12 = {size = 19, tag = 54, id = 76 'L', cancelled = 0 '\000', complete = {entries = {
+ sqh_first = 0x0, sqh_last = 0xaaab00046870}}, s = 0xaaab000454b8, next = {
+ le_next = 0xaaab000467c0, le_prev = 0xaaab00046f88}, idx = 88}
+(gdb)
+
+Address Sanitizer shows error and saying that there is a heap-use-after-free on *fidp*.
+
+
+This is an automated cleanup. This bug report has been moved to QEMU's
+new bug tracker on gitlab.com and thus gets marked as 'expired' now.
+Please continue with the discussion here:
+
+ https://gitlab.com/qemu-project/qemu/-/issues/181
+
+