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https://github.com/AuxXxilium/linux_dsm_epyc7002.git
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b35f8caa08
The following oops has been reported when dm-crypt runs over a loop device. ... [ 70.381058] Process loop0 (pid: 4268, ti=cf3b2000 task=cf1cc1f0 task.ti=cf3b2000) ... [ 70.381058] Call Trace: [ 70.381058] [<d0d76601>] ? crypt_dec_pending+0x5e/0x62 [dm_crypt] [ 70.381058] [<d0d767b8>] ? crypt_endio+0xa2/0xaa [dm_crypt] [ 70.381058] [<d0d76716>] ? crypt_endio+0x0/0xaa [dm_crypt] [ 70.381058] [<c01a2f24>] ? bio_endio+0x2b/0x2e [ 70.381058] [<d0806530>] ? dec_pending+0x224/0x23b [dm_mod] [ 70.381058] [<d08066e4>] ? clone_endio+0x79/0xa4 [dm_mod] [ 70.381058] [<d080666b>] ? clone_endio+0x0/0xa4 [dm_mod] [ 70.381058] [<c01a2f24>] ? bio_endio+0x2b/0x2e [ 70.381058] [<c02bad86>] ? loop_thread+0x380/0x3b7 [ 70.381058] [<c02ba8a1>] ? do_lo_send_aops+0x0/0x165 [ 70.381058] [<c013754f>] ? autoremove_wake_function+0x0/0x33 [ 70.381058] [<c02baa06>] ? loop_thread+0x0/0x3b7 When a table is being replaced, it waits for I/O to complete before destroying the mempool, but the endio function doesn't call mempool_free() until after completing the bio. Fix it by swapping the order of those two operations. The same problem occurs in dm.c with md referenced after dec_pending. Again, we swap the order. Cc: stable@kernel.org Signed-off-by: Milan Broz <mbroz@redhat.com> Signed-off-by: Alasdair G Kergon <agk@redhat.com> |
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