Re: v5.19-rc2-rt3: mm/kfence might_sleep() splat

[Date Prev][Date Next][Thread Prev][Thread Next][Date Index][Thread Index]

 



On 2022-06-18 11:34:51 [+0200], Mike Galbraith wrote:
> I moved the prandom_u32_max() call in kfence_guarded_alloc() out from
> under raw spinlock to shut this one up.

Care to send a patch? I don't even why kfence_metadata::lock is a
raw_spinlock_t. This is the case since the beginning of the code.

> [    1.128544] BUG: sleeping function called from invalid context at kernel/locking/spinlock_rt.c:46
> [    1.128546] in_atomic(): 1, irqs_disabled(): 1, non_block: 0, pid: 90, name: kworker/u16:3
> [    1.128547] preempt_count: 1, expected: 0
> [    1.128548] RCU nest depth: 1, expected: 1
> [    1.128549] CPU: 3 PID: 90 Comm: kworker/u16:3 Tainted: G        W         5.19.0.g0639b59-master-rt #2 55e5fbd63d8381661776ddec390c2b764f305c0b
> [    1.128551] Hardware name: MEDION MS-7848/MS-7848, BIOS M7848W08.20C 09/23/2013
> [    1.128552] Workqueue: events_unbound async_run_entry_fn
> [    1.128556] Call Trace:
> [    1.128557]  <TASK>
> [    1.128558]  dump_stack_lvl+0x44/0x58
> [    1.128562]  __might_resched+0x141/0x160
> [    1.128566]  rt_spin_lock+0x2d/0x70
> [    1.128569]  get_random_u32+0x45/0x100
> [    1.128575]  __kfence_alloc+0x3f4/0x6c0
> [    1.128647]  kmem_cache_alloc_lru+0x1d8/0x220
> [    1.128649]  xas_alloc+0x9b/0xc0
> [    1.128651]  xas_create+0x20c/0x390
> [    1.128653]  xas_store+0x52/0x5a0
> [    1.128655]  __filemap_add_folio+0x189/0x5a0
> [    1.128660]  filemap_add_folio+0x38/0xa0
> [    1.128661]  __filemap_get_folio+0x1b0/0x580
> [    1.128665]  pagecache_get_page+0x13/0x80
> [    1.128667]  simple_write_begin+0x20/0x2d0
> [    1.128669]  generic_perform_write+0xae/0x1e0
> [    1.128671]  __generic_file_write_iter+0x141/0x180
> [    1.128672]  generic_file_write_iter+0x5d/0xb0
> [    1.128674]  __kernel_write+0x139/0x2f0
> [    1.128676]  kernel_write+0x56/0x1a0
> [    1.128678]  xwrite.constprop.8+0x35/0x8e
> [    1.128682]  do_copy+0xee/0x13a
> [    1.128685]  write_buffer+0x27/0x37
> [    1.128687]  flush_buffer+0x34/0x8b
> [    1.128690]  unxz+0x1b8/0x301
> [    1.128695]  unpack_to_rootfs+0x17f/0x2ae
> [    1.128698]  do_populate_rootfs+0x59/0x108
> [    1.128700]  async_run_entry_fn+0x2b/0x110
> [    1.128701]  process_one_work+0x21f/0x4a0
> [    1.128703]  worker_thread+0x39/0x3d0
> [    1.128706]  kthread+0x13e/0x160
> [    1.128709]  ret_from_fork+0x1f/0x30
> [    1.128711]  </TASK>

Sebastian



[Index of Archives]     [RT Stable]     [Kernel Newbies]     [IDE]     [Security]     [Git]     [Netfilter]     [Bugtraq]     [Yosemite]     [Yosemite News]     [MIPS Linux]     [ARM Linux]     [Linux Security]     [Linux RAID]     [Linux ATA RAID]     [Samba]     [Video 4 Linux]     [Device Mapper]

  Powered by Linux