Date: Sun, 26 Feb 2023 20:56:08 +0000 From: bugzilla-noreply@freebsd.org To: fs@FreeBSD.org Subject: [Bug 267028] kernel panics when booting with ZFS and amdgpu.ko (both are required) Message-ID: <bug-267028-3630-ZARh6OypVa@https.bugs.freebsd.org/bugzilla/> In-Reply-To: <bug-267028-3630@https.bugs.freebsd.org/bugzilla/>
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https://bugs.freebsd.org/bugzilla/show_bug.cgi?id=267028 --- Comment #82 from Mark Millard <marklmi26-fbsd@yahoo.com> --- Using the gdb-based backtrace information: #8 0xffffffff80be8c5d in modlist_lookup (name=0xfffff80006217400 "acpi_wmi", ver=0) at /usr/src/sys/kern/kern_linker.c:1487 is for the strcmp code line in: static modlist_t modlist_lookup(const char *name, int ver) { modlist_t mod; TAILQ_FOREACH(mod, &found_modules, link) { if (strcmp(mod->name, name) == 0 && (ver == 0 || mod->version == ver)) return (mod); } return (NULL); } We also see that strcmp was called via: #6 <signal handler called> #7 strcmp (s1=<optimized out>, s2=<optimized out>) at /usr/src/sys/libkern/strcmp.c:46 We also see name was accessible, as shown in the "#8" line above. We see from #7 that strcmp was considered called, suggesting that the mod->name of itself did not fail. The implication would be that that value of name in mod->name was a bad pointer when strcmp tried to use the value. Nothing says that mod->name was or should have been for acpi_wmi at all. The "acpi_wmi" side of the comparison need not be relevant information. Other backtraces that look similar may well have a similar status for the name in the right had argument to the strcmp. This might be a useful hint to someone with appropriate background or suggest some way of detecting the bad value in mod->name earlier when that earlier context might be of more use for investigations. -- You are receiving this mail because: You are on the CC list for the bug. You are the assignee for the bug.home | help
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