Details
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Bug
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Resolution: Fixed
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Minor
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None
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3
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9223372036854775807
Description
Running racer with patch https://review.whamcloud.com/13669 "LU-7073 tests: Add file migration to racer" causes repeated client crashes:
https://testing-archive.whamcloud.com/gerrit-janitor/13887/testresults/racer-special4-ldiskfs-centos7_x86_64-centos7_x86_64/
https://testing-archive.whamcloud.com/gerrit-janitor/13887/testresults/racer-special6-ldiskfs-DNE-centos7_x86_64-centos7_x86_64/
https://testing-archive.whamcloud.com/gerrit-janitor/13887/testresults/racer-special10-ldiskfs-centos7_x86_64-centos7_x86_64/
https://testing-archive.whamcloud.com/gerrit-janitor/13887/testresults/racer-special8-ldiskfs-centos7_x86_64-centos7_x86_64/
It looks like there is an error in parsing the layout in lov_init_composite(), then the caller lov_layout_change() tries to clean up after the error and calls lov_delete_composite() and crashes:
[ 385.587338] LustreError: 20227:0:(lov_object.c:680:lov_init_composite()) lustre-clilov-ffff8800d65a3000: DOM entries with different sizes [ 385.590193] LustreError: 20227:0:(lov_ea.c:617:dump_lsm()) lsm ffff8800c2482280, objid 0x0:0, maxbytes 0x400000fe000, magic 0x0BD60BD0, refc: 2, entry: 4, layout_gen 4 [ 385.592938] LustreError: 20227:0:(lov_ea.c:639:dump_lsm()) [0x0, 0x80000): id: 65537, flags: 10, magic 0x0BD10BD0, layout_gen 0, stripe count 0, sstripe size 524288, pool: [] [ 385.596090] LustreError: 20227:0:(lov_ea.c:639:dump_lsm()) [0x80000, 0xffffffffffffffff): id: 65538, flags: 10, magic 0x0BD10BD0, layout_gen 0, stripe count 1, sstripe size 1048576, pool: [] [ 385.602686] LustreError: 20227:0:(lov_ea.c:649:dump_lsm()) oinfo:ffff8800c2482180: ostid: 0x0:1893 ost idx: 1 gen: 0 [ 385.607168] LustreError: 20227:0:(lov_ea.c:639:dump_lsm()) [0x0, 0x100000): id: 131073, flags: 11, magic 0x0BD10BD0, layout_gen 0, stripe count 0, sstripe size 1048576, pool: [] [ 385.610768] LustreError: 20227:0:(lov_ea.c:639:dump_lsm()) [0x100000, 0xffffffffffffffff): id: 131074, flags: 0, magic 0x0BD10BD0, layout_gen 65535, stripe count 1, sstripe size 1048576, pool: [] [ 385.615671] LustreError: 20227:0:(lov_object.c:1298:lov_layout_change()) lustre-clilov-ffff8800d65a3000: cannot apply new layout on [0x200000402:0x3e6a:0x0] : rc = -22 [ 385.615671] LustreError: 20227:0:(lov_object.c:1298:lov_layout_change()) lustre-clilov-ffff8800d65a3000: cannot apply new layout on [0x200000402:0x3e6a:0x0] : rc = -22 [ 385.620214] BUG: unable to handle kernel NULL pointer dereference at 0000000000000014 [ 385.622675] IP: [<ffffffffa08baef4>] lov_delete_composite+0x104/0x540 [lov] [ 385.627878] Oops: 0000 [#1] SMP DEBUG_PAGEALLOC [ 385.642379] CPU: 1 PID: 20227 Comm: ln Kdump: loaded [ [ 385.649327] RIP: 0010:[<ffffffffa08baef4>] lov_delete_composite+0x104/0x540 [lov] [ 385.669870] Call Trace: [ 385.670394] [<ffffffffa08bf96a>] lov_conf_set+0x8ca/0xaa0 [lov] [ 385.672880] [<ffffffffa0333950>] cl_conf_set+0x60/0x120 [obdclass] [ 385.675008] [<ffffffffa0de6a9b>] cl_file_inode_init+0x12b/0x390 [lustre] [ 385.677377] [<ffffffffa0dbaae5>] ll_update_inode+0x365/0x670 [lustre] [ 385.688379] [<ffffffffa0dcdef3>] ll_iget+0x253/0x350 [lustre] [ 385.689648] [<ffffffffa0dbf90d>] ll_prep_inode+0x20d/0x9b0 [lustre] [ 385.697886] [<ffffffffa0dce90c>] ll_lookup_it_finish.isra.24+0xbc/0xe60 [lustre] [ 385.702800] [<ffffffffa0dd001b>] ll_lookup_it.constprop.26+0x96b/0x1400 [lustre] [ 385.705598] [<ffffffffa0dd0b97>] ll_lookup_nd+0xe7/0x1c0 [lustre] [ 385.706979] [<ffffffff8124f2dd>] lookup_real+0x1d/0x50 [ 385.708098] [<ffffffff8124fdc2>] __lookup_hash+0x42/0x60 [ 385.709437] [<ffffffff817d5ff3>] lookup_slow+0x42/0xa7 [ 385.710981] [<ffffffff8125565e>] path_lookupat+0x89e/0x8d0 [ 385.714547] [<ffffffff812556bb>] filename_lookup+0x2b/0xc0 [ 385.715670] [<ffffffff812575b7>] user_path_at_empty+0x67/0xc0 [ 385.717213] [<ffffffff81257621>] user_path_at+0x11/0x20 [ 385.718617] [<ffffffff81249df3>] vfs_fstatat+0x63/0xc0
