Compiling a C program with lang/compaq-cc on my 164SX (PCA56) panics the machine with: panic: mutex Giant owned at /vinum/usr.cur/src/sys/kern/kern_thread.c:1445 at line 742 in file /vinum/usr.cur/src/sys/kern/kern_mutex.c Stack backtrace: db_print_backtrace() at 0xfffffc0000573418 = db_print_backtrace+0x18 backtrace() at 0xfffffc000043f52c = backtrace+0x2c __panic() at 0xfffffc000043f690 = __panic+0x150 _mtx_assert() at 0xfffffc0000433e0c = _mtx_assert+0xec thread_wait() at 0xfffffc0000450650 = thread_wait+0x30 kern_wait() at 0xfffffc0000423b90 = kern_wait+0x430 linux_wait4() at 0xfffffe0002ab9550 = linux_wait4+0x58 syscall() at 0xfffffc00005831dc = syscall+0x35c XentSys() at 0xfffffc0000573f50 = XentSys+0x64 --- syscall (365) --- --- user mode --- panic Calling doadump() after this produces a seemingly irrelevant dump: [root@Gatekeeper]:/var/crash# gdb -k /boot/kernel/kernel.debug vmcore.0 GNU gdb 5.2.1 (FreeBSD) Copyright 2002 Free Software Foundation, Inc. GDB is free software, covered by the GNU General Public License, and you are welcome to change it and/or distribute copies of it under certain conditions. Type "show copying" to see the conditions. There is absolutely no warranty for GDB. Type "show warranty" for details. This GDB was configured as "alpha-undermydesk-freebsd"... panic: mutex Giant owned at /vinum/usr.cur/src/sys/kern/kern_thread.c:1445 panic messages: --- --- Reading symbols from /boot/kernel/vinum.ko...done. Loaded symbols for /boot/kernel/vinum.ko Reading symbols from /boot/kernel/osf1.ko...done. Loaded symbols for /boot/kernel/osf1.ko Reading symbols from /boot/kernel/linux.ko...done. Loaded symbols for /boot/kernel/linux.ko #0 0xfffffc000043f008 in doadump () at /vinum/usr.cur/src/sys/kern/kern_shutdown.c:235 235 savectx(&dumppcb); (kgdb) bt #0 0xfffffc000043f008 in doadump () at /vinum/usr.cur/src/sys/kern/kern_shutdown.c:235 #1 0xfffffc0000387660 in db_fncall (dummy1=0, dummy2=0, dummy3=0, dummy4=0x0) at /vinum/usr.cur/src/sys/ddb/db_command.c:551 #2 0xfffffc0000387284 in db_command (last_cmdp=0xfffffc00006b3c00, cmd_table=0x0, aux_cmd_tablep=0xfffffc0000666af8, aux_cmd_tablep_end=0xfffffc0000666b18) at /vinum/usr.cur/src/sys/ddb/db_command.c:348 #3 0xfffffc0000387438 in db_command_loop () at /vinum/usr.cur/src/sys/ddb/db_command.c:475 #4 0xfffffc000038bb08 in db_trap (type=0, code=0) at /vinum/usr.cur/src/sys/ddb/db_trap.c:73 #5 0xfffffc0000572b40 in kdb_trap (a0=1, a1=0, a2=0, entry=3, regs=0xfffffe0012c8d948) at /vinum/usr.cur/src/sys/alpha/alpha/db_interface.c:208 #6 0xfffffc0000582db8 in trap (a0=1, a1=10, a2=28704, entry=3, framep=0xfffffe0012c8d948) at /vinum/usr.cur/src/sys/alpha/alpha/trap.c:378 #7 0xfffffc0000572cb8 in Debugger (msg=) at /vinum/usr.cur/src/sys/alpha/alpha/db_interface.c:277 (kgdb) How-To-Repeat: Try compiling the following source code using lang/compaq-cc: -- begin source code -- #include <unistd.h> #include <stdlib.h> #define MAXARRAY 250000 struct shr_data { unsigned long int Pinakas[MAXARRAY]; }; void QUICKSORT( struct shr_data *array, unsigned long int l, unsigned long int r ) { unsigned long int tmp, i = l + 1, k = r - 1; while( i <= k ) { if ( array->Pinakas[ i ] < array->Pinakas[ l ] ) i ++; else { tmp = array->Pinakas[ i ]; array->Pinakas[ i ] = array->Pinakas[ k ]; array->Pinakas[ k ] = tmp; k --; } } k ++; i --; tmp = array->Pinakas[ l ]; array->Pinakas[ l ] = array->Pinakas[ i ]; array->Pinakas[ i ] = tmp; if ( l < i ) QUICKSORT( array, l, i ); if ( r > k ) QUICKSORT( array, k, r ); } int main() { struct shr_data* array; unsigned long i; srandom( getpid() ); array = (struct shr_data*)malloc(sizeof(struct shr_data)); for ( i = 0; i < 250000; i ++ ) array->Pinakas[ i ] = random(); QUICKSORT( array, 0, 250000 ); free(array); return 0; } -- end source code -- I'll try to narrow down the source code that results in the crash. Just send-pr'ed this to add a data-point (and probably get some feedback). IMO this is a linux-emu-related problem. If I manage to get a working core (why does ddb get borked?), I'll follow-up to this.
State Changed From-To: open->feedback Fix committed to CURRENT to mark linux_wait4() as MP safe. Please verify that this fixes the problem, thanks.
Hi there. The problems seems to be fixed -- at least I can't reproduce it locally. Thanks :) \n\n -- Nikos "Noth" Ntarmos | < ntarmos at ceid dot upatras dot gr > NetCINS Lab. @ C.E.I.D. | [ http://{noth,p2p}.ceid.upatras.gr/ ] U. of Patras - Greece | ( 38.2594N, 21.7428E ) ( 1024D / CF95160A )
State Changed From-To: feedback->closed Submitter reports that the problem is now fixed.
A commit in branch main references this bug: URL: https://cgit.FreeBSD.org/ports/commit/?id=16ee2eafa863c9a9e44704da57ac232eb08e252a commit 16ee2eafa863c9a9e44704da57ac232eb08e252a Author: Emmanuel Vadot <manu@FreeBSD.org> AuthorDate: 2022-11-03 19:58:49 +0000 Commit: Emmanuel Vadot <manu@FreeBSD.org> CommitDate: 2022-11-04 08:47:37 +0000 x11/pixman: Update to 0.42.2 Release notes (0.42.0): https://lists.freedesktop.org/archives/pixman/2022-October/004993.html Release notes (0.42.2): https://lists.freedesktop.org/archives/pixman/2022-November/004994.html For now disable neon on aarch64, it's borked. PR: 67538 Security: CVE-2022-44638 Sponsored by: Beckhoff Automation GmbH & Co. KG x11/pixman/Makefile | 5 +++-- x11/pixman/distinfo | 6 +++--- x11/pixman/pkg-plist | 2 +- 3 files changed, 7 insertions(+), 6 deletions(-)
A commit in branch 2022Q4 references this bug: URL: https://cgit.FreeBSD.org/ports/commit/?id=3573adac89f2d4f479856995afa435f2c205d19c commit 3573adac89f2d4f479856995afa435f2c205d19c Author: Emmanuel Vadot <manu@FreeBSD.org> AuthorDate: 2022-11-03 19:58:49 +0000 Commit: Emmanuel Vadot <manu@FreeBSD.org> CommitDate: 2022-11-04 08:53:13 +0000 x11/pixman: Update to 0.42.2 Release notes (0.42.0): https://lists.freedesktop.org/archives/pixman/2022-October/004993.html Release notes (0.42.2): https://lists.freedesktop.org/archives/pixman/2022-November/004994.html For now disable neon on aarch64, it's borked. PR: 67538 Security: CVE-2022-44638 Sponsored by: Beckhoff Automation GmbH & Co. KG (cherry picked from commit 16ee2eafa863c9a9e44704da57ac232eb08e252a) x11/pixman/Makefile | 5 +++-- x11/pixman/distinfo | 6 +++--- x11/pixman/pkg-plist | 2 +- 3 files changed, 7 insertions(+), 6 deletions(-)