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Artifact ID: a1fe498cdb443b9b3b5d1247f01077b3cf97697a
Ticket: 5eaa61ea1881040b17449ca043b6f8fd9ca55dc3
sigbus on disk ful in WAL mode
Date: 2012-11-12 14:45:04
User: anonymous
Changes

  1. Change comment to:
    Attempts to prepare a query on a WAL database when the disk space is critically low result in the process killed with BUS.
    The crash happens in walIndexWriteHdr invoked from walIndexRecover:
     643 static void walIndexWriteHdr(Wal *pWal){
     [...]
     650   walChecksumBytes(1, (u8*)&pWal->hdr, nCksum, 0, pWal->hdr.aCksum);
     651   memcpy((void *)&aHdr[1], (void *)&pWal->hdr, sizeof(WalIndexHdr)); << sigbus here
    
    Since i don't know if I'll be able to attache a PoC after submitting this ticket, I'm adding it here in base64.
    base64 -d > mountme.bz2 << EOF
    QlpoOTFBWSZTWdl2FE4AAEd////////v7/5e/////L9v/+xv38ZSbAdOQV4FRCTR3/3s0ARNY3on
    aVG5ydncNEgTQE09IyngieU8gh6TINNPUAGmjQ2o0HpDQNNHqHqAAADTQ9RoeU0GR5Q8kBoZNqeo
    NEJpkRojCniamZNJo02oAzUNNGmyg0DIAAAAABoAAAAAANAaAAAxFE0Jij0J6hp5NR6Rk0ANAZBo
    GgAAAADQAAAAAAAAABoDQAgNDINMmmgYTQGhpk0aYEZGTQZDJkGRpkaNMg0aAGCNNBiGgAZNDJgI
    0GjQJFJRNNNDIGjTIbU0HqABoaaZDINAAAADQBiAGIGjQyNNGgAZMI0ZNDJoU3MeFxkkc3Z41hbW
    8jDkSjtOhgCTZvZDyAuQe9MlnyUJRsnBSKCqYknJpalrzfoZNLCdV70TdiIXxMRuU2IRkQJqG8QZ
    OQb+iYlGMFPlV0OmpxTALbroIwQMEAHxal5pbiPEEKHH0kN2QtWKoGkgJsW5O0ayrdAnCOCFYLWw
    lLfOMYqAyp0kAifKYYjJCJmGkTTtwu6OsOY0RUoOiYDGtSQctLi3zirl93O1IcPEMJd2yfKOo5VC
    tWwG8FR62hLdnPEziKCWNRAajF4aK+BaiAUlAZ2KQdmyNlQkNBaRNnI7pJPgEa24whyQSEgCKdFC
    /aaQiZaWUYc9gZLodGIx76jQRmC3DBQYgKCBI5zBjgkBPQAMNSLg5jVDAwp0lCg6hCZ3cBnTAKCr
    cB3YAkh1CQjQRAjhACk7EMgIYG/qJECI59jLeOZbEgNUsCyBI1VUxJGKqGBEkyVYgcIAm0kNpA2k
    Ek0adiIMAxDQmwQlHkcPEajEqCMs0KPm/J9/zgpwGR8bJkqz2cyCKk0efK1+mDyI2XAXOKDBngnh
    ufJHQ/UIOjK+VQ2Co9F59shqwue3JMARlIR+wwrBKYWf7aqVbNpnE2YHnSYYO78LCCQlXsSBlmIB
    gq+Mhwc5o4DY3koqRgDooKXZs6xZl9Pu99c/JOtbNB8swjv0DLMzBv1CaRMihk7i65cnPsysYte/
    g2qofXNK7kUHLlkQDswL2sD2Qxg18u1zVCzMcRKmYKwk+dyYVqIGgU9AWSAGFQncaikWEUsdh1cy
    DMTB1MUJJmoPKklNQgJliXgmCc48b5DvnmlACYCBG40dGAieggokSkAKv+aEPAwFF0hGpNk0JRQM
    hQpUWBdCAbFtYhjq4Qnk2IF16/kvnNfAx5nFlgNSp3At7mGEVQwmTWM2Pah6bczg7MK84eAyvC0S
    qZiDAVigjMRQUGiL+XmKkF1Sm6e/kUVALAMBBOMBKbkBCQEbxxkumARAAyffwCvK4lyRZC1cImG/
    O6CB4G0G2dmooW+OATX2TIF8lYiCl4hSdrvCgNAxQgtgsr8iCzICwdQCJPjc8hDYS67AulWQxxmw
    1WMNwqrviGcCT9CYWMaONSepUu5bLC9KfhepOKSBVBmQ8AZBSyB1ntos5HzRZMwLjGu6tPVUQKOd
    ozKDukqH+aYanaMEJAE+T6suVBNc/fNGBlP1+ZqyEaJCdpvPRVi/VJMHdoKy2QHNOxo3k8kUx7rg
    w8E49w6q6osXLYPmkQ2hELLO5TWp7D8RhybGAo6WXzt66MIRIkZ1kgghKRKYMAgB7YcebZbV7ada
    B/Asgf4nIUJ8iKZ1qbCYDBkg7H8sTf6oDqczF/X79LiIqxb1boNG662tp/Vz7JfwSCL6w4+2fqk3
    ym9/ynQJUzxwAZf7EwajzMXWBxQgiIjYJJ0YJATYEIr+KoYlEwFWSnnjkI3piIP1ycNM6496w1SD
    V/Xf8tkMAB4Ffbf/i7kinChIbLsKJwA=
    EOF
    
    Then:
    bunzip2 mountme.bz2
    mount -o loop mountme /mnt
    
    Finally:
    # sqlite3 /mnt/db.sqlite3 
    SQLite version 3.7.14.1 2012-10-04 19:37:12
    Enter ".help" for instructions
    Enter SQL statements terminated with a ";"
    sqlite> .tables
    Bus error
    
  2. Change detected to "Requirement_Testing"
  3. Change foundin to "2993ca20207f8dac02f58d01e31d68c84328356a"
  4. Change private_contact to "d8897a439aa8ad6ba5c5a703f9f6fce3a649bdf3"
  5. Change severity to "Important"
  6. Change status to "Open"
  7. Change subsystem to "Unknown"
  8. Change title to "sigbus on disk ful in WAL mode"
  9. Change type to "Code_Defect"