Hello Michal, thanks for the quick reply! On 05/04/2022 12:43, Michal Hocko wrote: >> 1. Crash of v5.4.170 on an ARM32 machine: >> >> Unable to handle kernel NULL pointer dereference at virtual address 00000104 >> pgd = e138149d >> [00000104] *pgd=84d2fd003, *pmd=8ffd6f003 >> Internal error: Oops: a07 [#1] PREEMPT SMP ARM >> ... >> CPU: 1 PID: 6172 Comm: AaSysInfoRColle Tainted: G B O 5.4.170-... #1 >> Hardware name: Keystone >> PC is at release_pages+0x194/0x358 >> LR is at release_pages+0x10c/0x358 > Which LOC does this correspond to? (faddr2line should give you a nice > output). Sorry, I forgot this info in the initial report: this is indeed the del_page_from_lru_list() in this crash. So it's either two different ->lru_lock or some other code path doesn't take lru_lock at all... -- Best regards, Alexander Sverdlin.
