Messages in this thread | | | Date | Mon, 28 Sep 1998 14:45:03 +1200 | From | Slava <> | Subject | 2.122 oops with java |
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Hello everybody,
My jEdit editor (written in Java, available at my homepage) oopeses when an attempt is made to read from a Unix domain socket. C programs don't seem to be affected. This is kernel 2.1.122 with no non-standard patches + libc 5.4.46. Here is the code chuck that produces the oops:
/**/ FileReader in = new FileReader(file);
... more unrelated code here, checking if file is a url, etc ...
char[] buff = new char[4096]; int n; // the oops occurs in read() while ((n = in.read(buff, 0, buff.length)) != -1) { insertString(getLength(),new String(buff,0,n),null); } in.close(); /**/
Slava
PS: Where do I get the klogd that automatically decodes the call trace? Doing it by hand is painful.
Sep 28 10:36:58 fireball kernel: Unable to handle kernel NULL pointer dereferenc e at virtual address 0000002c Sep 28 10:36:58 fireball kernel: current->tss.cr3 = 01b03000, ^Lr3 = 01b03000 Sep 28 10:36:58 fireball kernel: current->tss.cr3 = 01b03000, ^Lr3 = 01b03000 Sep 28 10:36:58 fireball kernel: *pde = 00000000 Sep 28 10:36:58 fireball kernel: *pde = 00000000 Sep 28 10:36:58 fireball kernel: Oops: 0000 Sep 28 10:36:58 fireball kernel: CPU: 0 Sep 28 10:36:59 fireball kernel: EIP: 0010:[<c012a946>] Sep 28 10:36:59 fireball kernel: EFLAGS: 00010202 Sep 28 10:36:59 fireball kernel: eax: c1fa2800 ebx: c12d3660 ecx: 00000009 edx: 00000000 Sep 28 10:36:59 fireball kernel: esi: 00002800 edi: 00002800 ebp: 00000004 esp: c0b7ff88 Sep 28 10:36:59 fireball kernel: ds: 0018 es: 0018 ss: 0018 Sep 28 10:36:59 fireball kernel: Process java (pid: 1939, process nr: 23, stackp age=c0b7f000) Sep 28 10:36:59 fireball kernel: Stack: c012ac20 00000009 c12d3660 00002800 c0b7 e000 00002800 00000004 413c0c4c Sep 28 10:36:59 fireball kernel: 00000000 c0115b4d 413c0f04 413c07b0 c010 8bf0 c12d3660 c0107a64 00000009 Sep 28 10:36:59 fireball kernel: 00000004 00002800 00002800 00000004 413c 0c4c 00000037 0000002b 0000002b Sep 28 10:36:59 fireball kernel: Call Trace: [<c012ac20>] [<c0115b4d>] [<c0108bf 0>] [<c0107a64>] Sep 28 10:36:59 fireball kernel: Code: 83 7a 2c 00 74 13 89 f0 c1 e8 0d 83 e0 01 50 53 51 8b 42 2c EIP: 0010:[<c012a946>] - c012a90c t setfl -- this seems the reference filep->f_ops and filep->dentry without checking if they're non null, maybe that's the problem? [<c012ac20>] - c012a97c T sys_fcntl -- this is strange, why would a syscall be called from within the kernel? [<c0115b4d>] - c0115b08 T do_bottom_half [<c0108bf0>] - c0108bb8 T do_IRQ [<c0107a64>] - c0100000 - there's a whole bunch of symbols which start at c0100000... probably interrupt handler
Slava
-- Slava Pestov (mailto:slava_pestov@geocities.com) http://www.geocities.com/SiliconValley/Heights/7925 Linux 2.0.35 on an i586MMX (400.59 BogoMips)
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