Messages in this thread | | | Date | Sat, 22 Feb 2003 00:09:37 -0800 | From | "Martin J. Bligh" <> | Subject | Oops in rpc_depopulate with 2.5.62 |
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Getting rpc/nfs bugs on at least two different machines I've seen and reports of a third from Zwane - all look similar. Anyone got any bright ideas?
M.
Unable to handle kernel NULL pointer dereference at virtual address 0000006c printing eip: c03415e2 *pde = 358d2001 *pte = 00000000 Oops: 0002 CPU: 1 EIP: 0060:[<c03415e2>] Not tainted EFLAGS: 00010206 EIP is at rpc_depopulate+0x22/0xf0 eax: 00000000 ebx: f5133680 ecx: 0000006c edx: f50afc1c esi: f50afbf4 edi: f50afbf4 ebp: f50afc08 esp: f50afbec ds: 007b es: 007b ss: 0068 Process mount (pid: 1166, threadinfo=f50ae000 task=f5766d80) Stack: c01562f0 00000000 f50afbf4 f50afbf4 f5133680 f5133680 f51c1e00 f50afc40 c0341af5 f5133680 f5117880 f7ff9800 f50afcec 00000000 f50afc34 00000010 00000001 00000000 f5982680 f50afcec 00000000 f50afc50 c0333066 f5982714 Call Trace: [<c01562f0>] lookup_hash+0x70/0xa0 [<c0341af5>] rpc_rmdir+0x55/0x90 [<c0333066>] rpc_destroy_client+0x46/0x70 [<c03330db>] rpc_release_client+0x4b/0x60 [<c0337bc7>] rpc_release_task+0x1a7/0x1d0 [<c033754b>] __rpc_execute+0x35b/0x370 [<c011a980>] default_wake_function+0x0/0x20 [<c0333274>] rpc_call_sync+0x64/0xa0 [<c0333287>] rpc_call_sync+0x77/0xa0 [<c03366b0>] rpc_run_timer+0x0/0xa0 [<c033e5fb>] rpc_register+0xcb/0x100 [<c0110000>] mask_and_ack_8259A+0x10/0xf0 [<c0339d24>] svc_register+0x94/0x100 [<c0339944>] svc_create+0xd4/0xe0 [<c01c1fb8>] lockd_up+0x58/0x110 [<c01a63f4>] nfs_fill_super+0x374/0x3a0 [<c01a7e90>] nfs_get_sb+0x1f0/0x230 [<c0150052>] do_kern_mount+0x42/0xa0 [<c01631e6>] do_add_mount+0x76/0x150 [<c0133596>] __alloc_pages+0x76/0x2c0 [<c01634d7>] do_mount+0x147/0x160 [<c0163908>] sys_mount+0xa8/0x110 [<c010ae7b>] syscall_call+0x7/0xb
Code: f0 ff 48 6c 0f 88 70 09 00 00 f0 fe 0d 00 d2 44 c0 0f 88 6d
Seems to be crashing on the deference of:
down(&dir->i_sem);
in rpc_depopulate. But there's a big comment just above saying:
----------------------- /* * FIXME: This probably has races. */ static void rpc_depopulate(struct dentry *parent) { struct inode *dir = parent->d_inode; LIST_HEAD(head); struct list_head *pos, *next; struct dentry *dentry;
down(&dir->i_sem);
------------------
Looks like dir is NULL here ... might be dcache_rcu (a recent dcache_rcu patch fixed the same file) or a race brought out by the changes.
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