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SubjectRe: WARNING: refcount bug in blk_mq_free_request (2)
syzbot has bisected this bug to:

commit 12f5b93145450c750f315657ef239a314811aeeb
Author: Keith Busch <>
Date: Tue May 29 13:52:28 2018 +0000

blk-mq: Remove generation seqeunce

bisection log:
start commit: e21a712a Linux 5.3-rc3
git tree: upstream
final crash:
console output:
kernel config:
dashboard link:
syz repro:
C reproducer:

Fixes: 12f5b9314545 ("blk-mq: Remove generation seqeunce")

For information about bisection process see:

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