Re: panic: bremfree: buffer 0xdc6ff768 not on a queue.

From: Kris Kennaway (kris_at_obsecurity.org)
Date: 02/27/05

  • Next message: Peter Wemm: "Re: MCE on AMD64" 
    Date: Sat, 26 Feb 2005 19:05:53 -0800
To: Kris Kennaway <kris@obsecurity.org>

    On Sat, Feb 26, 2005 at 05:35:55PM -0800, Kris Kennaway wrote:
    > A dual CPU machine running 6.0 from a couple of weeks ago panicked
    > overnight with:
    >
    > panic: bremfree: buffer 0xdc6ff768 not on a queue.
    > cpuid = 1
    > KDB: enter: panic
    > [thread pid 26507 tid 100945 ]
    > Stopped at kdb_enter+0x30: leave
    > db> wh
    > Tracing pid 26507 tid 100945 td 0xc6eda730
    > kdb_enter(c06f5a0f,1,c06fce5f,ef4a5a68,c6eda730) at kdb_enter+0x30
    > panic(c06fce5f,dc6ff768,2090022,ef4a5aa8,c0569188) at panic+0x14e
    > bremfree(dc6ff768,2090022,c4544450,c6eda730,0) at bremfree+0x5d
    > getblk(c4544450,b,0,4000,0) at getblk+0x1a8
    > cluster_read(c4544450,32ea8,0,b,0) at cluster_read+0x108
    > ffs_read(ef4a5c0c,c0730880,c4544450,c663d048,ef4a5c58) at ffs_read+0x2e0
    > VOP_READ_APV(c07391e0,ef4a5c0c,c6eda730,36f,0) at VOP_READ_APV+0xbc
    > vn_read(c663d048,ef4a5c80,c9e26d00,0,c6eda730) at vn_read+0x1e7
    > dofileread(c6eda730,c663d048,3,8064000,8000) at dofileread+0xcc
    > read(c6eda730,ef4a5d14,c,16,3) at read+0x6b
    > syscall(805002f,2f,bfbf002f,8000,1000) at syscall+0x2a0
    > Xint0x80_syscall() at Xint0x80_syscall+0x1f
    > --- syscall (3, FreeBSD ELF32, read), eip = 0x280f8b3f, esp = 0xbfbfb7cc, ebp = 0xbfbfb858 ---
    > db>
    >
    > Is this problem already fixed?

    Panicked again during the kernel update with:

    panic: softdep_write_inodeblock: direct pointer #0 mismatch 0 != 1454895
    cpuid = 1
    KDB: enter: panic
    [thread pid 58 tid 100079 ]
    Stopped at kdb_enter+0x30: leave
    db> wh
    Tracing pid 58 tid 100079 td 0xc37e8cf0
    kdb_enter(c06f5aef,1,c07075c9,ebdfdaac,c37e8cf0) at kdb_enter+0x30
    panic(c07075c9,c0707486,0,0,0) at panic+0x14e
    initiate_write_inodeblock_ufs2(c5d1ec80,dc54e3d8,c0706a3b,de1,c5dc6180) at initiate_write_inodeblock_ufs2+0x4d2
    softdep_disk_io_initiation(dc54e3d8,d2f,dc54e3d8,dc54e3d8,ebdfdb94) at softdep_disk_io_initiation+0xbd
    softdep_disk_prewrite(dc54e3d8,dc54e3d8,a0020024,ebdfdbbc,c0566032) at softdep_disk_prewrite+0x7f
    ffs_geom_strategy(c386dafc,dc54e3d8,c05667f1,c079e560,0) at ffs_geom_strategy+0x18
    bufwrite(dc54e3d8,0,c0707dcb,657,dc54e438) at bufwrite+0x172
    ffs_bufwrite(dc54e3d8,c06f4f1b,12b,80012,10) at ffs_bufwrite+0x2f8
    vfs_bio_awrite(dc54e3d8,0,c06fdf0c,1a8,64) at vfs_bio_awrite+0x27e
    vop_stdfsync(ebdfdcb0,0,ebdfdcb0,ebdfdc84,c06d1c7c) at vop_stdfsync+0x128
    devfs_fsync(ebdfdcb0,c386dac8,c386dafc,c386dac8,ebdfdccc) at devfs_fsync+0x2e
    VOP_FSYNC_APV(c0722020,ebdfdcb0,c37e8cf0,5d0,c3631400) at VOP_FSYNC_APV+0xbc
    sync_vnode(c386dafc,c37e8cf0,c06fe68f,607,0) at sync_vnode+0x152
    sched_sync(0,ebdfdd48,c06f3254,30e,0) at sched_sync+0x25f
    fork_exit(c0578570,0,ebdfdd48) at fork_exit+0xc6
    fork_trampoline() at fork_trampoline+0x8
    --- trap 0x1, eip = 0, esp = 0xebdfdd7c, ebp = 0 ---

    Kris

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