Messages in this thread | | | Date | Sun, 2 Dec 2007 17:13:25 +0100 | From | Adrian Bunk <> | Subject | Re: [BUG 2.6.24-rc3-git6] SLUB's ksize() fails for size > 2048. |
| |
On Sun, Dec 02, 2007 at 07:39:59PM +0900, Tetsuo Handa wrote: > Hello. > > I can't pass memory allocated by kmalloc() to ksize() > if it is allocated by SLUB allocator and > size is larger than (I guess) PAGE_SIZE / 2. > > Regards. > > ---------- Kernel config (grep CONFIG_SLUB .config) ---------- > CONFIG_SLUB_DEBUG=y > CONFIG_SLUB=y > # CONFIG_SLUB_DEBUG_ON is not set > > ---------- Testing program (ksize_test.c) ---------- > #include <linux/module.h> > #include <linux/slab.h> > > static int __init init_ksize_test(void) > { > void *p = kmalloc(2049, GFP_KERNEL); > printk("ksize(%p) = %d\n", p, ksize(p)); > kfree(p); > return -ENOMEM; > } > > module_init(init_ksize_test) > > MODULE_LICENSE("GPL"); > > ------------[ cut here ]------------ > kernel BUG at mm/slub.c:2562! > invalid opcode: 0000 [#1] SMP > Modules linked in: ksize_test > > Pid: 8473, comm: modprobe Not tainted (2.6.24-rc3-git6 #4) > EIP: 0060:[<c01714a2>] EFLAGS: 00010246 CPU: 1 > EIP is at ksize+0x1b/0x4a > EAX: 00000000 EBX: dd776000 ECX: c16721d0 EDX: 00000000 > ESI: e081b280 EDI: df3a396c EBP: dd595ea0 ESP: dd595ea0 > DS: 007b ES: 007b FS: 00d8 GS: 0033 SS: 0068 > Process modprobe (pid: 8473, ti=dd595000 task=d347cd60 task.ti=dd595000) > Stack: dd595eb8 e081e01a dd595eb8 c014010c ffffffff e08193e0 dd595fb0 c0150b18 > 00000000 00000000 00001866 00000000 dd4dac00 d347cd60 c14366ac 00000230 > 0000135c 0000000e dd4dac00 e081b280 00000000 00000000 00000000 00000000 > Call Trace: > [<c0106008>] show_trace_log_lvl+0x1a/0x2f > [<c01060b8>] show_stack_log_lvl+0x9b/0xa3 > [<c0106167>] show_registers+0xa7/0x178 > [<c010634c>] die+0x114/0x1f5 > [<c0417018>] do_trap+0x8a/0xa3 > [<c01066ec>] do_invalid_op+0x88/0x92 > [<c0416dea>] error_code+0x72/0x78 > [<e081e01a>] init_ksize_test+0x1a/0x40 [ksize_test] > [<c0150b18>] sys_init_module+0x13d3/0x14ff > [<c0104f7e>] sysenter_past_esp+0x5f/0xa5 > ======================= > Code: 8b 02 5d 84 c0 b8 00 00 00 00 0f 49 d0 89 d0 c3 55 85 c0 89 e5 75 04 0f 0b eb fe 31 d2 83 f8 10 74 34 e8 b4 ff ff ff 85 c0 75 04 <0f> 0b eb fe 8b 40 0c 85 c0 75 04 0f 0b eb fe 8b 10 f6 c6 0c 74 > EIP: [<c01714a2>] ksize+0x1b/0x4a SS:ESP 0068:dd595ea0
Can you confirm that it works in 2.6.23?
If yes this is most likely caused by commit aadb4bc4a1f9108c1d0fbd121827c936c2ed4217
cu Adrian
--
"Is there not promise of rain?" Ling Tan asked suddenly out of the darkness. There had been need of rain for many days. "Only a promise," Lao Er said. Pearl S. Buck - Dragon Seed
| |