On 11/16/24 16:35, Sasha Levin wrote:
> [ Obviously I fat-fingered it and didn't add Christian or Al ]
I have found the problem and looks like I managed to force push an older
broken version of a branch, possibly due to switching between two computers.
Serves me well for amending in some last minute R-b tags. Doing git diff
@{u} to check for unexpected suprirses before pushing the result didn't help
this time, either I forgot or was blind.
I have deleted the slab-for-6.13 signed tag and pushed the fixed branch only
to -next. Thanks a lot Sasha for catching this early and please drop the
merge from the for-linus tree.
Thanks,
Vlastimil
> On Sat, Nov 16, 2024 at 10:32:23AM -0500, Sasha Levin wrote:
>>[ Adding Christian and Al ]
>>
>>On Fri, Nov 15, 2024 at 03:22:30PM +0100, Vlastimil Babka wrote:
>>>Hi Linus,
>>>
>>>please pull the latest slab updates from:
>>>
>>> git://git.kernel.org/pub/scm/linux/kernel/git/vbabka/slab.git tags/slab-for-6.13
>>>
>>>One new feature and non-critical fixes (mostly related to debugging).
>>>No conflicts to be expected, AFAIK.
>>
>>After merging the last batch of pull requests which included VFS and
>>SLAB into my linus-next[1] tree I've started seeing consistent boot and
>>runtime failures both on LKFT[2] and KernelCI[3]. I'm going to start
>>bisection, but given the amount of content that went in it might take a
>>day or two.
>>
>>It seems that this is something in the interaction between VFS and SLAB:
>>
>>Boot failures:
>>
>>[ 4.600870] __kmem_cache_create_args(ext4_groupinfo_4k) failed with error -22
>>[ 4.602001] CPU: 1 UID: 0 PID: 1 Comm: swapper/0 Not tainted 6.12.0-rc7 #1
>>[ 4.602644] Hardware name: linux,dummy-virt (DT)
>>[ 4.603346] Call trace:
>>[ 4.603594] dump_backtrace+0x108/0x190
>>[ 4.604831] show_stack+0x24/0x38
>>[ 4.605104] dump_stack_lvl+0x40/0xa0
>>[ 4.605472] dump_stack+0x18/0x28
>>[ 4.605842] __kmem_cache_create_args+0x21c/0x248
>>[ 4.606235] ext4_mb_init+0x118/0x720
>>[ 4.606572] ext4_fill_super+0x1550/0x17d8
>>[ 4.606890] get_tree_bdev_flags+0x138/0x1d8
>>[ 4.607279] get_tree_bdev+0x20/0x38
>>[ 4.607643] ext4_get_tree+0x24/0x38
>>[ 4.608013] vfs_get_tree+0x3c/0x108
>>[ 4.608260] do_new_mount+0x154/0x398
>>[ 4.608622] path_mount+0x258/0x4d0
>>[ 4.609030] init_mount+0x78/0xc8
>>[ 4.609434] do_mount_root+0xd4/0x1b0
>>[ 4.609887] mount_root_generic+0x110/0x308
>>[ 4.610177] mount_block_root+0x5c/0x78
>>[ 4.610428] mount_root+0x74/0xa8
>>[ 4.610662] prepare_namespace+0x8c/0xd8
>>[ 4.610922] kernel_init_freeable+0x10c/0x160
>>[ 4.611197] kernel_init+0x2c/0x1c0
>>[ 4.611437] ret_from_fork+0x10/0x20
>>[ 4.612106] EXT4-fs: no memory for groupinfo slab cache
>>[ 4.612757] EXT4-fs (vda): failed to initialize mballoc (-12)
>>
>>Runtime failures:
>>
>>__kmem_cache_create_args(ext4_groupinfo_1k) failed with error -22
>>CPU: 0 UID: 0 PID: 76 Comm: kunit_try_catch Tainted: G N 6.12.0-rc7 #1
>>Tainted: [N]=TEST
>>Hardware name: ARM-Versatile (Device Tree Support)
>>Call trace:
>> unwind_backtrace from show_stack+0x10/0x14
>> show_stack from dump_stack_lvl+0x34/0x3c
>> dump_stack_lvl from __kmem_cache_create_args+0x24c/0x2c4
>> __kmem_cache_create_args from ext4_mb_init+0xf4/0x690
>> ext4_mb_init from mbt_kunit_init+0x394/0x474
>> mbt_kunit_init from kunit_try_run_case+0x40/0x1d4
>> kunit_try_run_case from kunit_generic_run_threadfn_adapter+0x1c/0x34
>> kunit_generic_run_threadfn_adapter from kthread+0xe0/0x10c
>> kthread from ret_from_fork+0x14/0x28
>>Exception stack(0xd0981fb0 to 0xd0981ff8)
>>1fa0: 00000000 00000000 00000000 00000000
>>1fc0: 00000000 00000000 00000000 00000000 00000000 00000000 00000000 00000000
>>1fe0: 00000000 00000000 00000000 00000000 00000013 00000000
>>EXT4-fs: no memory for groupinfo slab cache
>> # test_new_blocks_simple: failed to initialize: -12
>>------------[ cut here ]------------
>>kernel BUG at fs/ext4/mballoc.c:3283!
>>Internal error: Oops - BUG: 0 [#1] PREEMPT ARM
>>Modules linked in:
>>CPU: 0 UID: 0 PID: 77 Comm: kunit_try_catch Tainted: G N 6.12.0-rc7 #1
>>Tainted: [N]=TEST
>>Hardware name: ARM-Versatile (Device Tree Support)
>>PC is at ext4_mb_release+0x2f4/0x31c
>>LR is at mbt_kunit_exit+0x10/0x80
>>pc : [<c02239d4>] lr : [<c022e758>] psr: 60000113
>>sp : d0985f18 ip : d0985f30 fp : 00000000
>>r10: 00000000 r9 : d0811d50 r8 : c17cc000
>>r7 : c17cc000 r6 : c16be240 r5 : c1c761c0 r4 : d0811d44
>>r3 : ffff0fff r2 : 00000000 r1 : c12d3fc0 r0 : 00000000
>>Flags: nZCv IRQs on FIQs on Mode SVC_32 ISA ARM Segment none
>>Control: 00093177 Table: 00004000 DAC: 00000053
>>Register r0 information: NULL pointer
>>Register r1 information: non-slab/vmalloc memory
>>Register r2 information: NULL pointer
>>Register r3 information: non-paged memory
>>Register r4 information: 2-page vmalloc region starting at 0xd0810000 allocated at copy_process+0x170/0xdd4
>>Register r5 information: slab task_struct start c1c761c0 pointer offset 0 size 1728
>>Register r6 information: slab kmalloc-64 start c16be240 pointer offset 0 size 64
>>Register r7 information: slab kmalloc-1k start c17cc000 pointer offset 0 size 1024
>>Register r8 information: slab kmalloc-1k start c17cc000 pointer offset 0 size 1024
>>Register r9 information: 2-page vmalloc region starting at 0xd0810000 allocated at copy_process+0x170/0xdd4
>>Register r10 information: NULL pointer
>>Register r11 information: NULL pointer
>>Register r12 information: 2-page vmalloc region starting at 0xd0984000 allocated at copy_process+0x170/0xdd4
>>Process kunit_try_catch (pid: 77, stack limit = 0x(ptrval))
>>Stack: (0xd0985f18 to 0xd0986000)
>>5f00: c1440000 00000000
>>5f20: c102e680 c1c76638 d0985f68 c0c21734 00000003 00000000 00000004 d0811d44
>>5f40: c1c761c0 c16be240 d0811c88 c17cc000 d0811d50 00000000 00000000 c022e758
>>5f60: d0811d44 c1c761c0 c16be240 d0811c88 c039be9c d0811d50 00000000 c0399c0c
>>5f80: d0811d50 c039beb8 c16bf160 c0044a4c c16bf160 c004496c 00000000 00000000
>>5fa0: 00000000 00000000 00000000 c000854c 00000000 00000000 00000000 00000000
>>5fc0: 00000000 00000000 00000000 00000000 00000000 00000000 00000000 00000000
>>5fe0: 00000000 00000000 00000000 00000000 00000013 00000000 00000000 00000000
>>Call trace:
>> ext4_mb_release from mbt_kunit_exit+0x10/0x80
>> mbt_kunit_exit from kunit_try_run_case_cleanup+0x30/0x3c
>> kunit_try_run_case_cleanup from kunit_generic_run_threadfn_adapter+0x1c/0x34
>> kunit_generic_run_threadfn_adapter from kthread+0xe0/0x10c
>> kthread from ret_from_fork+0x14/0x28
>>Exception stack(0xd0985fb0 to 0xd0985ff8)
>>5fa0: 00000000 00000000 00000000 00000000
>>5fc0: 00000000 00000000 00000000 00000000 00000000 00000000 00000000 00000000
>>5fe0: 00000000 00000000 00000000 00000000 00000013 00000000
>>Code: e3a010c9 e3811c0e eb278c81 eaffff5d (e7f001f2)
>>---[ end trace 0000000000000000 ]---
>>
>>
>>[1] https://git.kernel.org/pub/scm/linux/kernel/git/sashal/linus-next.git/log/?h=linus-next
>>[2] https://qa-reports.linaro.org/lkft/sashal-linus-next/build/v6.11-15430-gc12cd257292c/testrun/25849362/suite/boot/test/clang-19-lkftconfig/log
>>[3] https://kciapistagingstorage1.file.core.windows.net/early-access/baseline-x86-kcidebug-amd-6738b3dc1a48e7821930a51b/log.txt.gz?sv=2022-11-02&ss=f&srt=sco&sp=r&se=2026-10-18T13:36:18Z&st=2024-10-17T05:36:18Z&spr=https&sig=xFxYOOh5uXJWeN9I3YKAUvpGGQivo89HKZbD78gcxvc%3D
>>
>>--
>>Thanks,
>>Sasha
>>
>
