> BUG: unable to handle kernel NULL pointer dereference at 00000072 I keep seeing this error for many years with unionfs. Would anybody please explain what this error means? and what does it say about the code? Thank you very much Tomas M Tetsuo Handa wrote: > Hello. > > I tried 2.6.27-rc6 + unionfs 2.5 , but this problem is remaining. > > Regards. > > ----- CentOS 5.2 ( gcc version 4.1.2 ) ----- > TOMOYO-ERROR: sys_chmod() denied for /bin/touch > BUG: unable to handle kernel NULL pointer dereference at 00000072 > IP: [<c048d5ac>] notify_change+0x1c/0x1d8 > *pde = 00000000 > Oops: 0000 [#1] SMP DEBUG_PAGEALLOC > Modules linked in: ipv6 sbs sbshc battery backlight lp floppy ide_cd_mod cdrom serio_raw ac parport_pc parport rtc_cmos rtc_core button rtc_lib pcnet32 mii pcspkr unionfs mptspi scsi_transport_spi mptscsih mptbase sd_mod scsi_mod ext3 jbd [last unloaded: microcode] > > Pid: 2291, comm: touch Not tainted (2.6.27-rc6-unionfs #2) > EIP: 0060:[<c048d5ac>] EFLAGS: 00010246 CPU: 0 > EIP is at notify_change+0x1c/0x1d8 > EAX: 00000000 EBX: 00000070 ECX: 00000000 EDX: dec00f14 > ESI: dec00f14 EDI: d4b20df4 EBP: dec00ea4 ESP: dec00e7c > DS: 007b ES: 007b FS: 00d8 GS: 0033 SS: 0068 > Process touch (pid: 2291, ti=dec00000 task=db6a20e0 task.ti=dec00000) > Stack: d4bbee20 d4b20ec0 00000000 22222222 22222222 22222222 22222222 d4b20e88 > dec00f14 d4b20df4 dec00ed8 e08b5af6 dec00f14 d4bbe2a0 d4bbee20 d4bc02a0 > d4bcadf4 00000000 d4bcadb0 00000000 00000000 dec00f14 00000000 dec00f08 > Call Trace: > [<e08b5af6>] ? unionfs_setattr+0x29c/0x3b4 [unionfs] > [<c048d742>] ? notify_change+0x1b2/0x1d8 > [<c0497a10>] ? utimes_common+0x100/0x13a > [<c0497aef>] ? do_utimes+0xa5/0xbf > [<c0497b73>] ? sys_futimesat+0x6a/0x78 > [<c0453968>] ? audit_syscall_entry+0x101/0x12b > [<c05ee02a>] ? do_page_fault+0x0/0x58d > [<c0497b91>] ? sys_utimes+0x10/0x12 > [<c04038b1>] ? sysenter_do_call+0x12/0x31 > ======================= > Code: e8 11 7f 00 00 31 c0 83 c4 14 5b 5e 5f 5d c3 55 89 e5 57 56 89 d6 53 83 ec 1c 8b 1e 89 45 d8 8b 40 28 f7 c3 07 00 01 00 89 45 e0 <66> 8b 50 72 66 89 55 e4 74 10 83 cf ff f6 80 f0 01 00 00 0c 0f > EIP: [<c048d5ac>] notify_change+0x1c/0x1d8 SS:ESP 0068:dec00e7c > ---[ end trace 403e02e983cf15ec ]--- > _______________________________________________ > unionfs mailing list: http://unionfs.filesystems.org/ > unionfs@xxxxxxxxxxxxxxxxxxxxxx > http://www.fsl.cs.sunysb.edu/mailman/listinfo/unionfs > -- To unsubscribe from this list: send the line "unsubscribe linux-fsdevel" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
