Hello, Krzysztof. On Mon, Jun 03, 2019 at 11:07:46AM +0200, Krzysztof Kozlowski wrote: > Hi, > > On recent next I see bugs during boot (after bringing up user-space or > during reboot): > kernel BUG at ../mm/vmalloc.c:470! > On all my boards. On QEMU I see something similar, although the > message is "Internal error: Oops - undefined instruction: 0 [#1] ARM", > > The calltrace is: > [ 34.565126] [<c0275c9c>] (__free_vmap_area) from [<c0276044>] > (__purge_vmap_area_lazy+0xd0/0x170) > [ 34.573963] [<c0276044>] (__purge_vmap_area_lazy) from [<c0276d50>] > (_vm_unmap_aliases+0x1fc/0x244) > [ 34.582974] [<c0276d50>] (_vm_unmap_aliases) from [<c0279500>] > (__vunmap+0x170/0x200) > [ 34.590770] [<c0279500>] (__vunmap) from [<c01d5a70>] > (do_free_init+0x40/0x5c) > [ 34.597955] [<c01d5a70>] (do_free_init) from [<c01478f4>] > (process_one_work+0x228/0x810) > [ 34.606018] [<c01478f4>] (process_one_work) from [<c0147f0c>] > (worker_thread+0x30/0x570) > [ 34.614077] [<c0147f0c>] (worker_thread) from [<c014e8b4>] > (kthread+0x134/0x164) > [ 34.621438] [<c014e8b4>] (kthread) from [<c01010b4>] > (ret_from_fork+0x14/0x20) > > Full log here: > https://krzk.eu/#/builders/1/builds/3356/steps/14/logs/serial0 > https://krzk.eu/#/builders/22/builds/1118/steps/35/logs/serial0 > > Bisect pointed to: > 728e0fbf263e3ed359c10cb13623390564102881 is the first bad commit > commit 728e0fbf263e3ed359c10cb13623390564102881 > Author: Uladzislau Rezki (Sony) <urezki@xxxxxxxxx> > Date: Sat Jun 1 12:20:19 2019 +1000 > mm/vmalloc.c: get rid of one single unlink_va() when merge > I have checked the linux-next. I can confirm it happens because of: mm/vmalloc.c: get rid of one single unlink_va() when merge The problem is that, it has been applied wrongly into linux-next tree for some reason, i do not why. Probably due to the fact that i based my work on 5.1/2-rcX, whereas linux-next is a bit ahead of it. If so, sorry for that. See below the clean patch for remotes/linux-next/master: <snip> diff --git a/mm/vmalloc.c b/mm/vmalloc.c index 650c89f38c1e..0ed95b864e31 100644 --- a/mm/vmalloc.c +++ b/mm/vmalloc.c @@ -719,9 +719,6 @@ merge_or_add_vmap_area(struct vmap_area *va, /* Check and update the tree if needed. */ augment_tree_propagate_from(sibling); - /* Remove this VA, it has been merged. */ - unlink_va(va, root); - /* Free vmap_area object. */ kmem_cache_free(vmap_area_cachep, va); @@ -746,12 +743,11 @@ merge_or_add_vmap_area(struct vmap_area *va, /* Check and update the tree if needed. */ augment_tree_propagate_from(sibling); - /* Remove this VA, it has been merged. */ - unlink_va(va, root); + if (merged) + unlink_va(va, root); /* Free vmap_area object. */ kmem_cache_free(vmap_area_cachep, va); - return; } } -- 2.11.0 <snip> Andrew, i am not sure how to proceed with that. Should i send an updated series based on linux-next tip or you can fix directly that patch? Thank you! -- Vlad Rezki
