Messages in this thread Patch in this message | | | Date | Thu, 7 Apr 2005 04:10:06 -0700 | From | Andrew Morton <> | Subject | Re: crash in entry.S restore_all, 2.6.12-rc2, x86, PAGEALLOC |
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Ingo Molnar <mingo@elte.hu> wrote: > > --- linux/arch/i386/kernel/entry.S.orig > +++ linux/arch/i386/kernel/entry.S > @@ -179,12 +179,17 @@ need_resched: > ENTRY(sysenter_entry) > movl TSS_sysenter_esp0(%esp),%esp > sysenter_past_esp: > - sti > + # > + # irqs are disabled: set up an entry stackframe without > + # allowing irqs to potentially preempt us with an > + # incomplete entry frame! > + # > pushl $(__USER_DS) > pushl %ebp > pushfl > pushl $(__USER_CS) > pushl $SYSENTER_RETURN > + sti >
Well that bites the big one.
Program received signal SIGTRAP, Trace/breakpoint trap. 0xc015c4ba in __find_get_block (bdev=0xc18cd988, block=2818614, size=4096) at fs/buffer.c:1371 1371 BUG_ON(irqs_disabled()); (gdb) t [Current thread is 0 (Thread 32768)] (gdb) bt #0 0xc015c4ba in __find_get_block (bdev=0xc18cd988, block=2818614, size=4096) at fs/buffer.c:1371 #1 0xc015c57b in __getblk (bdev=0xc18cd988, block=2818614, size=4096) at fs/buffer.c:1487 #2 0xc0199978 in ext3_getblk (handle=0x0, inode=0xcff2a2b4, block=1, create=0, errp=0xcdf61dbc) at include/linux/buffer_head.h:260 #3 0xc019d5a6 in ext3_find_entry (dentry=0xcdaef8d4, res_dir=0xcdf61dfc) at fs/ext3/namei.c:868 #4 0xc019d9ca in ext3_lookup (dir=0x1, dentry=0xcdaef8d4, nd=0xcdf61f58) at fs/ext3/namei.c:988 #5 0xc0166b2d in real_lookup (parent=0xcdaef8d4, name=0xcdf61e8c, nd=0xcdf61f58) at fs/namei.c:416 #6 0xc0166df3 in do_lookup (nd=0xcdf61f58, name=0xcdf61e8c, path=0xcdf61e84) at fs/namei.c:670 #7 0xc0167667 in __link_path_walk (name=0xcdd24011 "", nd=0xcdf61f58) at fs/namei.c:833 #8 0xc0167c28 in link_path_walk (name=0xcdd24000 "/lib/libpcre.so.0", nd=0xcdf61f58) at fs/namei.c:911 #9 0xc0168056 in path_lookup (name=0xcdd24000 "/lib/libpcre.so.0", flags=0, nd=0xcdf61f58) at fs/namei.c:1026 #10 0xc016877d in open_namei (pathname=0xcdd24000 "/lib/libpcre.so.0", flag=1, mode=-1208907480, nd=0xcdf61f58) at fs/namei.c:1420 #11 0xc0159256 in filp_open (filename=0xcdd24000 "/lib/libpcre.so.0", flags=0, mode=-1208907480) at fs/open.c:764 #12 0xc01595e6 in sys_open (filename=0x1 <Address 0x1 out of bounds>, flags=1, mode=1) at fs/open.c:946 #13 0xc0102e91 in syscall_call () at arch/i386/kernel/semaphore.c:177 #14 0xb7f22c8a in ?? ()
Is someone doing a syscall with irqs disabled, or what?
This fixes it...
--- 25/arch/i386/kernel/entry.S~sysenter-irq-atomicity-fix-fix 2005-04-07 04:03:07.000000000 -0700 +++ 25-akpm/arch/i386/kernel/entry.S 2005-04-07 04:05:47.000000000 -0700 @@ -187,6 +187,7 @@ sysenter_past_esp: pushl $(__USER_DS) pushl %ebp pushfl + orl $0x200,0(%esp) pushl $(__USER_CS) pushl $SYSENTER_RETURN sti _ - To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
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