[Bugme-new] [Bug 13432] New: dma mapping bug -> crash .Some where between the 2.6.29 and the 2.6.29.4 kernel a bug has appeared.

Tue Jun 2 20:16:35 PDT 2009

http://bugzilla.kernel.org/show_bug.cgi?id=13432

           Summary: dma mapping bug -> crash .Some where between the
                    2.6.29 and the 2.6.29.4 kernel a bug has appeared.
           Product: IO/Storage
           Version: 2.5
    Kernel Version: 2.26.9.4
          Platform: All
        OS/Version: Linux
              Tree: Mainline
            Status: NEW
          Severity: high
          Priority: P1
         Component: Serial ATA
        AssignedTo: jgarzik at pobox.com
        ReportedBy: db.pub.mail at gmail.com
        Regression: Yes

Some where between the 2.6.29 and the 2.6.29.4 kernel a bug has appeared. This
system is a linkstation pro v2. Both kernel were compiled on the device. To
reproduce this bug i turn the device on and use samba to copy files to it.
Below is one report re: the bug. This bug can crash the system completely. 

May 28 00:01:34 linkstation kernel: [82380.150000] kernel BUG at
arch/arm/mm/dma-mapping.c:496!
May 28 00:01:34 linkstation kernel: [82380.150000] Unable to handle kernel NULL
pointer dereference at virtual address 00000000
May 28 00:01:34 linkstation kernel: [82380.160000] pgd = c6188000
May 28 00:01:34 linkstation kernel: [82380.160000] [00000000] *pgd=05825031,
*pte=00000000, *ppte=00000000
May 28 00:01:34 linkstation kernel: [82380.170000] Internal error: Oops: 817
[#1] PREEMPT
May 28 00:01:34 linkstation kernel: [82380.170000] Modules linked in: ipv6 nfsd
exportfs nfs lockd nfs_acl auth_rpcgss sunrpc fuse usblp
May 28 00:01:34 linkstation kernel: [82380.170000] CPU: 0 Not tainted (2.6.29.4
#1)
May 28 00:01:34 linkstation kernel: [82380.170000] PC is at __bug+0x20/0x2c
May 28 00:01:34 linkstation kernel: [82380.170000] LR is at
release_console_sem+0x1d8/0x260
May 28 00:01:34 linkstation kernel: [82380.170000] pc : [<c002dda0>] lr :
[<c004ef80>] psr: 60000013
May 28 00:01:34 linkstation kernel: [82380.170000] sp : c5a07c68 ip : c5a07ba8
fp : c5a07c74
May 28 00:01:34 linkstation kernel: [82380.170000] r10: c799f258 r9 : c79e31e0
r8 : c64b0100
May 28 00:01:34 linkstation kernel: [82380.170000] r7 : c591f858 r6 : c79e31e0
r5 : c03f49a4 r4 : c591f858
May 28 00:01:34 linkstation kernel: [82380.170000] r3 : 00000000 r2 : 00000000
r1 : 00002e67 r0 : 0000003f
May 28 00:01:34 linkstation kernel: [82380.170000] Flags: nZCv IRQs on FIQs on
Mode SVC_32 ISA ARM Segment user
May 28 00:01:34 linkstation kernel: [82380.170000] Control: a005317f Table:
06188000 DAC: 00000015
May 28 00:01:34 linkstation kernel: [82380.170000] Process smbd (pid: 26454,
stack limit = 0xc5a06268)
May 28 00:01:34 linkstation kernel: [82380.170000] Stack: (0xc5a07c68 to
0xc5a08000)
May 28 00:01:34 linkstation kernel: [82380.170000] 7c60: c5a07c94 c5a07c78
c002fe74 c002dd90 c006a9bc ffffffff
May 28 00:01:34 linkstation kernel: [82380.170000] 7c80: c03f49a4 00000e38
c5a07ccc c5a07c98 c025e078 c002fe00 c006aa08 c006a99c
May 28 00:01:34 linkstation kernel: [82380.170000] 7ca0: 00000000 c79e31e0
c5a07f20 00000001 00002b48 00000072 c79e9b14 c591f858
May 28 00:01:34 linkstation kernel: [82380.170000] 7cc0: c5a07d14 c5a07cd0
c025f100 c025e04c c79e31e0 00000000 000022aa c79e9b00
May 28 00:01:34 linkstation kernel: [82380.170000] 7ce0: c5a07f18 c799f258
c0264308 00000072 00000072 00000000 00000072 00002238
May 28 00:01:34 linkstation kernel: [82380.170000] 7d00: 00000072 c5a06000
c5a07d5c c5a07d18 c02818b8 c025f040 00000072 c5a07d28
May 28 00:01:34 linkstation kernel: [82380.170000] 7d20: c02648c0 c5a07f18
c7850bc0 c799f258 c64f0820 c7850bc0 c6a58b00 00000072
May 28 00:01:34 linkstation kernel: [82380.170000] 7d40: 00000000 00002238
00000072 c5a06000 c5a07dd4 c5a07d60 c02a06a8 c0281864
May 28 00:01:34 linkstation kernel: [82380.170000] 7d60: 00000072 c79e9b00
00000000 c5a07e30 00000000 c6a58da4 00000001 c64f0820
May 28 00:01:34 linkstation kernel: [82380.170000] 7d80: 00000000 c6a58b64
c6a58dc0 c6a58ba4 c6a58e90 c6a58b7c 0000002e 0000002e
May 28 00:01:34 linkstation kernel: [82380.170000] 7da0: 7fffffff c02a10d8
c0102e94 bf12d430 c5a07e30 000022aa c74c68c0 c5a07e30
May 28 00:01:34 linkstation kernel: [82380.170000] 7dc0: c5a07f18 00000001
c5a07e04 c5a07dd8 c02634e0 c02a007c 00000000 00000000
May 28 00:01:34 linkstation kernel: [82380.170000] 7de0: c5a07dec be9e79c8
be9e7948 00000000 bf119190 c5a07e88 c5a07e7c c5a07e08
May 28 00:01:34 linkstation kernel: [82380.170000] 7e00: c0260abc c02634a4
00000000 00000040 00000000 00000000 00000000 000022aa
May 28 00:01:34 linkstation kernel: [82380.170000] 7e20: c74c68c0 c79e31e0
00000000 c5a07e30 00000000 00000000 c5a07f18 00000001
May 28 00:01:34 linkstation kernel: [82380.170000] 7e40: 00000000 00000000
00000000 c5a07e88 c006556c c5a07e88 c79e31e0 c5a07f18
May 28 00:01:34 linkstation kernel: [82380.170000] 7e60: c5a07f70 fffffdee
c5a06000 00000000 c5a07f44 c5a07e80 c00aa8bc c02609c0
May 28 00:01:34 linkstation kernel: [82380.170000] 7e80: 00000000 00000000
00000001 be9e7510 00000000 00000001 ffffffff c79e31e0
May 28 00:01:34 linkstation kernel: [82380.170000] 7ea0: 00000000 00000000
00000000 00000000 c64f0820 c00342a0 00000000 00000000
May 28 00:01:34 linkstation kernel: [82380.170000] 7ec0: 0011aa06 c64f0820
c006556c c5a07ecc c5a07ecc 00000000 00000000 00000000
May 28 00:01:34 linkstation kernel: [82380.170000] 7ee0: c5a07e10 c5a07ef0
c006e0c8 c00342a0 000022aa c5a07f60 0011aa06 c03f1580
May 28 00:01:34 linkstation kernel: [82380.170000] 7f00: c03f1560 be9e7948
00000015 00000000 00000000 c74c69f4 00664606 00000000
May 28 00:01:34 linkstation kernel: [82380.170000] 7f20: c0ee9e38 c79e31e0
0066235c c5a07f70 000022aa 0066235c c5a07f6c c5a07f48
May 28 00:01:34 linkstation kernel: [82380.170000] 7f40: c00ab544 c00aa810
00000000 00000000 00000000 00000000 c79e31e0 000022aa
May 28 00:01:34 linkstation kernel: [82380.170000] 7f60: c5a07fa4 c5a07f70
c00ab6c8 c00ab488 00000000 00000000 00000000 00000000
May 28 00:01:34 linkstation kernel: [82380.170000] 7f80: 4a1bf63d 00000000
000022aa 0066235c 00000003 c002a048 00000000 c5a07fa8
May 28 00:01:34 linkstation kernel: [82380.170000] 7fa0: c0029ea0 c00ab694
00000000 000022aa 00000006 0066235c 000022aa 0000839a
May 28 00:01:34 linkstation kernel: [82380.170000] 7fc0: 00000000 000022aa
0066235c 00000003 0000839a 0000ea60 0000839a 00530000
May 28 00:01:34 linkstation kernel: [82380.170000] 7fe0: 00000006 be9e7798
001a1fcc 40267eac 40000010 00000006 00000000 00000000
May 28 00:01:34 linkstation kernel: [82380.170000] Backtrace:
May 28 00:01:34 linkstation kernel: [82380.170000] [<c002dd80>]
(__bug+0x0/0x2c) from [<c002fe74>] (dma_cache_maint+0x84/0xec)
May 28 00:01:34 linkstation kernel: [82380.170000] [<c002fdf0>]
(dma_cache_maint+0x0/0xec) from [<c025e078>]
(dma_async_memcpy_buf_to_pg+0x3c/0x108)
May 28 00:01:34 linkstation kernel: [82380.170000] r6:00000e38 r5:c03f49a4
r4:ffffffff
May 28 00:01:34 linkstation kernel: [82380.170000] [<c025e03c>]
(dma_async_memcpy_buf_to_pg+0x0/0x108) from [<c025f100>]
(dma_memcpy_to_iovec+0xd0/0x134)
May 28 00:01:34 linkstation kernel: [82380.170000] [<c025f030>]
(dma_memcpy_to_iovec+0x0/0x134) from [<c02818b8>]
(dma_skb_copy_datagram_iovec+0x64/0x1c8)
May 28 00:01:34 linkstation kernel: [82380.170000] [<c0281854>]
(dma_skb_copy_datagram_iovec+0x0/0x1c8) from [<c02a06a8>]
(tcp_recvmsg+0x63c/0xb94)
May 28 00:01:34 linkstation kernel: [82380.170000] [<c02a006c>]
(tcp_recvmsg+0x0/0xb94) from [<c02634e0>] (sock_common_recvmsg+0x4c/0x60)
May 28 00:01:34 linkstation kernel: [82380.170000] [<c0263494>]
(sock_common_recvmsg+0x0/0x60) from [<c0260abc>] (sock_aio_read+0x10c/0x11c)
May 28 00:01:34 linkstation kernel: [82380.170000] r5:c5a07e88 r4:bf119190
May 28 00:01:34 linkstation kernel: [82380.170000] [<c02609b0>]
(sock_aio_read+0x0/0x11c) from [<c00aa8bc>] (do_sync_read+0xbc/0x108)
May 28 00:01:34 linkstation kernel: [82380.170000] [<c00aa800>]
(do_sync_read+0x0/0x108) from [<c00ab544>] (vfs_read+0xcc/0x18c)
May 28 00:01:34 linkstation kernel: [82380.170000] r8:0066235c r7:000022aa
r6:c5a07f70 r5:0066235c r4:c79e31e0
May 28 00:01:34 linkstation kernel: [82380.170000] [<c00ab478>]
(vfs_read+0x0/0x18c) from [<c00ab6c8>] (sys_read+0x44/0x70)
May 28 00:01:34 linkstation kernel: [82380.170000] r7:000022aa r6:c79e31e0
r5:00000000 r4:00000000
May 28 00:01:34 linkstation kernel: [82380.170000] [<c00ab684>]
(sys_read+0x0/0x70) from [<c0029ea0>] (ret_fast_syscall+0x0/0x2c)
May 28 00:01:34 linkstation kernel: [82380.170000] r8:c002a048 r7:00000003
r6:0066235c r5:000022aa r4:00000000
May 28 00:01:34 linkstation kernel: [82380.170000] Code: e1a01000 e59f000c
eb0af149 e3a03000 (e5833000)
May 28 00:01:34 linkstation kernel: [82380.640000] ---[ end trace
c8d58d057de0b990 ]---

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