Hi,
I mounted a cdrom and hot unplugged it without unmounting. It didnt oops
until I tried to unmount it, then got a NULL pointer in cdrom_release.
This is on a ppc64 blade.
It looks like cdo->lock_door is NULL.
Anton
0:mon> e
cpu 0: Vector: 300 (Data Access) at [c0000000120bb6e0]
pc: c00000000031bb5c (.cdrom_release+0x104/0x1e8)
lr: c000000000310f54 (.sr_block_release+0x20/0x34)
dar: 0
pid = 1695, comm = umount
0:mon> t
[c0000000000b0f98] .invalidate_bdev+0x24/0x3c
[c000000000310f54] .sr_block_release+0x20/0x34
[c0000000000bbdf8] .blkdev_put+0x368/0x39c
[c0000000000b9d34] .kill_block_super+0x38/0x54
[c0000000000b80f4] .deactivate_super+0x114/0x1a8
[c0000000000d7e28] .__mntput+0x38/0x54
[c0000000000c30b0] .path_release+0x6c/0x74
[c0000000000d8a24] .sys_umount+0x58/0xbc
exception: c00 (System Call) regs c0000000120bbea0
0:mon> r
R00 = 0000000000000000 R16 = 0000000000000000
R01 = c0000000120bb960 R17 = 0000000000000000
R02 = c00000000072a770 R18 = 0000000000000000
R03 = c000000012f513b0 R19 = 0000000000000000
R04 = 0000000000000000 R20 = 0000000000000001
R05 = 000000000000000c R21 = c000000000560ec0
R06 = 0000000000000010 R22 = b000000000009032
R07 = c000000000d8bfc0 R23 = c0000000120bbea0
R08 = 0000000000000000 R24 = 0000000000000000
R09 = 0000000000000000 R25 = 0000000000000000
R10 = 0000000000000000 R26 = 0000000000000000
R11 = c00000001262b400 R27 = 0000000000000000
R12 = 0000000000000002 R28 = 0000000000000001
R13 = c000000000560000 R29 = c00000001dd59400
R14 = 0000000000000000 R30 = c000000000689d58
R15 = 0000000000000000 R31 = c000000012f513b0
pc = c00000000031bb5c msr = 8000000000009032
lr = c000000000310f54 cr = 0000000022000442
ctr = c000000000310f34 xer = 0000000000000000 trap = 300
0:mon> di %pc
c00000000031bb5c e8090000 ld r0,0(r9)
c00000000031bb60 f8410028 std r2,40(r1)
c00000000031bb64 e9690010 ld r11,16(r9)
c00000000031bb68 e8490008 ld r2,8(r9)
c00000000031bb6c 7c0903a6 mtctr r0
c00000000031bb70 4e800421 bctrl
c00000000031bb74 e8410028 ld r2,40(r1)
c00000000031bb78 801f0030 lwz r0,48(r31)
c00000000031bb7c 2c000000 cmpwi r0,0
c00000000031bb80 40820038 bne 0xc00000000031bbb8 # .cdrom_release+0x160
c00000000031bb84 2c1c0000 cmpwi r28,0
c00000000031bb88 41820030 beq 0xc00000000031bbb8 # .cdrom_release+0x160
c00000000031bb8c e81f0028 ld r0,40(r31)
c00000000031bb90 5400f7bc rlwinm r0,r0,30,30,30
c00000000031bb94 2c000000 cmpwi r0,0
c00000000031bb98 41820020 beq 0xc00000000031bbb8 # .cdrom_release+0x160
-------------------------------------------------------
This SF.Net email is sponsored by: IBM Linux Tutorials
Free Linux tutorial presented by Daniel Robbins, President and CEO of
GenToo technologies. Learn everything from fundamentals to system
administration.http://ads.osdn.com/?ad_id=1470&alloc_id=3638&op=click
_______________________________________________
[EMAIL PROTECTED]
To unsubscribe, use the last form field at:
https://lists.sourceforge.net/lists/listinfo/linux-usb-devel
