Re: [syzbot] [mm?] INFO: rcu detected stall in sys_umount (3)

[syzbot]

Hello,

syzbot has tested the proposed patch and the reproducer did not trigger any issue:

Reported-by: syzbot+1ec0f904ba50d06110b1@xxxxxxxxxxxxxxxxxxxxxxxxx
Tested-by: syzbot+1ec0f904ba50d06110b1@xxxxxxxxxxxxxxxxxxxxxxxxx

Tested on:

commit:         cda250b0 change_mnt_propagation(): calculate propagati..
git tree:       vfs-fixes
console output: https://syzkaller.appspot.com/x/log.txt?x=13eb7ba2580000
kernel config:  https://syzkaller.appspot.com/x/.config?x=2e92a122a0cf6f2a
dashboard link: https://syzkaller.appspot.com/bug?extid=1ec0f904ba50d06110b1
compiler:       Debian clang version 20.1.7 (++20250616065708+6146a88f6049-1~exp1~20250616065826.132), Debian LLD 20.1.7
userspace arch: arm64

Note: no patches were applied.
Note: testing is done by a robot and is best-effort only.