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authorDavid Howells <dhowells@redhat.com>2019-08-22 13:28:43 +0100
committerDavid Howells <dhowells@redhat.com>2019-08-22 13:33:26 +0100
commita5fb8e6c02d6a518fb2b1a2b8c2471fa77b69436 (patch)
tree789dd4ce9ffac3d52183dcd1df3b1dc8260549a0 /fs/binfmt_elf_fdpic.c
parentd1abaeb3be7b5fa6d7a1fbbd2e14e3310005c4c1 (diff)
afs: Fix leak in afs_lookup_cell_rcu()
Fix a leak on the cell refcount in afs_lookup_cell_rcu() due to non-clearance of the default error in the case a NULL cell name is passed and the workstation default cell is used. Also put a bit at the end to make sure we don't leak a cell ref if we're going to be returning an error. This leak results in an assertion like the following when the kafs module is unloaded: AFS: Assertion failed 2 == 1 is false 0x2 == 0x1 is false ------------[ cut here ]------------ kernel BUG at fs/afs/cell.c:770! ... RIP: 0010:afs_manage_cells+0x220/0x42f [kafs] ... process_one_work+0x4c2/0x82c ? pool_mayday_timeout+0x1e1/0x1e1 ? do_raw_spin_lock+0x134/0x175 worker_thread+0x336/0x4a6 ? rescuer_thread+0x4af/0x4af kthread+0x1de/0x1ee ? kthread_park+0xd4/0xd4 ret_from_fork+0x24/0x30 Fixes: 989782dcdc91 ("afs: Overhaul cell database management") Signed-off-by: David Howells <dhowells@redhat.com>
Diffstat (limited to 'fs/binfmt_elf_fdpic.c')
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