[fuse-devel] NULL pointer oops in CVS fuse

[David S. <ds...@ja...>]

On a 2.6.17 kernel:

Sep 27 12:16:47 hostname kernel: BUG: unable to handle kernel NULL pointer dereference at virtual address 0000015c
Sep 27 12:16:47 hostname kernel:  printing eip:
Sep 27 12:16:47 hostname kernel: f8bd526d
Sep 27 12:16:47 hostname kernel: *pde = 007ab001
Sep 27 12:16:47 hostname kernel: Oops: 0000 [#1]
Sep 27 12:16:47 hostname kernel: SMP 
Sep 27 12:16:47 hostname kernel: last sysfs file: /class/vc/vcsa6/dev
Sep 27 12:16:47 hostname kernel: Modules linked in: nfsd exportfs lockd nfs_acl ipt_REDIRECT fuse(U) ipv6 i2c_dev i2c_core sunrpc ipt_REJECT xt_state xt_tcpudp iptable_filter iptable_nat ip_nat ip_conntrack nfnetlink ip_tables x_tables dm_mod video button battery ac softdog uhci_hcd ehci_hcd e752x_edac edac_mc hw_random e1000 bonding floppy sg ext3 jbd mptspi scsi_transport_spi mptscsih mptbase sd_mod scsi_mod
Sep 27 12:16:47 hostname kernel: CPU:    0
Sep 27 12:16:47 hostname kernel: EIP:    0060:[<f8bd526d>]    Not tainted VLI
Sep 27 12:16:47 hostname kernel: EFLAGS: 00010246   (2.6.17-1.2142_FC4smp #1) 
Sep 27 12:16:47 hostname kernel: EIP is at fuse_readpages+0x43/0x6a [fuse]
Sep 27 12:16:47 hostname kernel: eax: 00000000   ebx: 00000000   ecx: c06fb38c   edx: 00000001
Sep 27 12:16:47 hostname kernel: esi: ccb54200   edi: f356f2c0   ebp: f6a150c0   esp: f7207d64
Sep 27 12:16:47 hostname kernel: ds: 007b   es: 007b   ss: 0068
Sep 27 12:16:47 hostname kernel: Process nfsd (pid: 3515, threadinfo=f7207000 task=f6147770)
Sep 27 12:16:47 hostname kernel: Stack: 00000000 f356f2c0 ccb54200 f8bd522a c1417220 c1417238 f7207de4 c044f6db 
Sep 27 12:16:47 hostname kernel:        00000008 00000060 f356f2c0 ccb542e8 ccb542f8 00000989 00000008 00000008 
Sep 27 12:16:47 hostname kernel:        f3dab490 c1c0cb00 f3dab2d0 f7c3d900 00802040 00000000 00000008 00000040 
Sep 27 12:16:47 hostname kernel: Call Trace:
Sep 27 12:16:47 hostname kernel:  <f8bd522a> fuse_readpages+0x0/0x6a [fuse]  <c044f6db> __do_page_cache_readahead+0x1a6/0x2ad
Sep 27 12:16:47 hostname kernel:  <c044fa78> blockable_page_cache_readahead+0x46/0x99  <c044fc71> page_cache_readahead+0x116/0x179
Sep 27 12:16:47 hostname kernel:  <c044ab60> do_generic_mapping_read+0x142/0x453  <f8bd41eb> fuse_finish_open+0x29/0x3e [fuse]
Sep 27 12:16:47 hostname kernel:  <c044aeb7> generic_file_sendfile+0x46/0x5b  <f8cc1884> nfsd_read_actor+0x0/0xa1 [nfsd]
Sep 27 12:16:47 hostname kernel:  <f8cc0f13> nfsd_vfs_read+0x194/0x272 [nfsd]  <f8cc1884> nfsd_read_actor+0x0/0xa1 [nfsd]
Sep 27 12:16:47 hostname kernel:  <f8cc186e> nfsd_read+0x87/0x9d [nfsd]  <f8cc94f5> nfs3svc_decode_readargs+0x0/0x18e [nfsd]
Sep 27 12:16:47 hostname kernel:  <f8cc7b77> nfsd3_proc_read+0xc8/0x11e [nfsd]  <f8cc94f5> nfs3svc_decode_readargs+0x0/0x18e [nfsd]
Sep 27 12:16:47 hostname kernel:  <f8cbe0cc> nfsd_dispatch+0xbc/0x16f [nfsd]  <f8c06a26> svc_process+0x37a/0x5b4 [sunrpc]
Sep 27 12:16:47 hostname kernel:  <f8cbe5e8> nfsd+0x1d3/0x377 [nfsd]  <f8cbe415> nfsd+0x0/0x377 [nfsd]
Sep 27 12:16:47 hostname kernel:  <c0402005> kernel_thread_helper+0x5/0xb 
Sep 27 12:16:47 hostname kernel: Code: 00 00 8b aa f0 01 00 00 89 e2 89 7c 24 04 89 74 24 08 c7 04 24 00 00 00 00 52 89 da e8 6f a6 87 c7 89 c3 85 db 58 75 20 8b 04 24 <83> b8 5c 01 00 00 00 74 0b 89 f1 89 fa e8 27 ff ff ff eb 09 89 
Sep 27 12:16:47 hostname kernel: EIP: [<f8bd526d>] fuse_readpages+0x43/0x6a [fuse] SS:ESP 0068:f7207d64
Sep 27 12:16:47 hostname kernel:  <0>Fatal exception: panic in 5 seconds