Re: [PATCH 6.1 000/481] 6.1.167-rc1 review

[Theodore Tso]

On Wed, Mar 25, 2026 at 10:49:43AM +0100, Greg Kroah-Hartman wrote:
> > I don't have time to investigate further, but Greg, if you could drop
> > these three patches, that should address this issue.
> 
> All now dropped, thanks!

Thanks!  Just as another heads up, I decided to run a full regression
test suite on 6.1.167-rc1 with those three reverts, and there ar still
some crashes with generic/051 and ext4/039:

ext4/4k: 711 tests, 1 errors, 83 skipped, 4645 seconds
  Errors: generic/051
ext4/1k: 636 tests, 7 failures, 1 errors, 78 skipped, 5612 seconds
  Errors: ext4/039
ext4/encrypt: 679 tests, 1 errors, 215 skipped, 3343 seconds
  Errors: generic/051
ext4/ext3conv: 706 tests, 1 errors, 85 skipped, 5282 seconds
  Errors: generic/051
ext4/adv: 713 tests, 13 failures, 1 errors, 91 skipped, 4944 seconds
  Errors: generic/051
ext4/dioread_nolock: 711 tests, 1 failures, 1 errors, 83 skipped, 5518 seconds
  Errors: generic/051
ext4/data_journal: 635 tests, 6 failures, 1 errors, 151 skipped, 4105 seconds
  Errors: ext4/039
ext4/bigalloc_4k: 604 tests, 1 errors, 79 skipped, 4876 seconds
  Errors: ext4/039
ext4/bigalloc_1k: 682 tests, 6 failures, 1 errors, 106 skipped, 5454 seconds
  Errors: generic/051
ext4/dax: 705 tests, 10 failures, 1 errors, 207 skipped, 3249 seconds
  Errors: generic/051

I'll start trying to bisect this as I have time today.  Are you going
to put out another rc and restart the 48 hour testing clock?

       	   	      	  	      - Ted

P.S.  A sample crash:

   BUG: unable to handle page fault for address: ffffffffffffffec
   #PF: supervisor read access in kernel mode
   #PF: error_code(0x0000) - not-present page
   PGD 300d067 P4D 300d067 PUD 300f067 PMD 0 
   Oops: 0000 [#1] PREEMPT SMP NOPTI
   CPU: 1 PID: 326494 Comm: fsstress Not tainted 6.1.167-rc1-xfstests-00485-gb12a69d9770b #50
   Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 02/12/2026
   RIP: 0010:ext4_ext_map_blocks+0x190/0xa50
   Code: 48 89 ef 48 8d 54 24 60 e8 9d 71 ff ff 85 c0 41 89 c3 89 44 24 28 0f 84 51 02 00 00 48 8b 44 24 30 48 85 c0 0f 84 72 04 00 00 <44> 0f b7 78 08 48 89 1c 24 49 89 c5 31 db 49 89 c6 49 8b 7d 28 48
   RSP: 0018:ffffd16f045b7968 EFLAGS: 00010286
   RAX: ffffffffffffffe4 RBX: ffffd16f045b7ac8 RCX: 00000000000005ea
   RDX: ffffffff9b2407d0 RSI: 0000000000000000 RDI: ffff8e671ae1c410
   RBP: ffff8e66f8b72688 R08: ffffffff9b4a7024 R09: 0000000000000000
   R10: 0000000000000000 R11: ffff8e676f1e2ff0 R12: 0000000000000001
   R13: 00000000000f6422 R14: ffff8e66c244c000 R15: ffff8e66c0fd3080
   FS:  00007f67932c6740(0000) GS:ffff8e6799500000(0000) knlGS:0000000000000000
   CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
   CR2: ffffffffffffffec CR3: 000000013d210000 CR4: 0000000000350ee0
   Call Trace:
    <TASK>
    ext4_map_blocks+0x237/0x690
    ext4_iomap_begin+0x2af/0x320
    iomap_iter+0xb1/0x130
    __iomap_dio_rw+0x21e/0x650
    ? aio_fsync_work+0xf0/0xf0
    iomap_dio_rw+0xe/0x30
    ext4_dio_write_iter+0x612/0x6f0
    ? filename_lookup+0xde/0x1a0
    ? mntput_no_expire+0x4e/0x260
    aio_write+0x159/0x2a0
    ? fget+0x7a/0xa0
    ? io_submit_one+0xef/0x3b0
    io_submit_one+0xef/0x3b0
    __x64_sys_io_submit+0xac/0x1d0
    do_syscall_64+0x35/0x80
    entry_SYSCALL_64_after_hwframe+0x6e/0xd8
   RIP: 0033:0x7f67933d7779
   Code: ff c3 66 2e 0f 1f 84 00 00 00 00 00 0f 1f 44 00 00 48 89 f8 48 89 f7 48 89 d6 48 89 ca 4d 89 c2 4d 89 c8 4c 8b 4c 24 08 0f 05 <48> 3d 01 f0 ff ff 73 01 c3 48 8b 0d 67 76 0d 00 f7 d8 64 89 01 48
   RSP: 002b:00007fff8d7191f8 EFLAGS: 00000246 ORIG_RAX: 00000000000000d1
   RAX: ffffffffffffffda RBX: 00007f67932c66c8 RCX: 00007f67933d7779
   RDX: 00007fff8d719248 RSI: 0000000000000001 RDI: 00007f67934c6000
   RBP: 00007f67934c6000 R08: 0000000000000001 R09: 0000000000007c38
   R10: 0000000000000001 R11: 0000000000000246 R12: 0000000000000001
   R13: 0000000000000019 R14: 00007fff8d719248 R15: 0000000000019000
    </TASK>
   CR2: ffffffffffffffec
   ---[ end trace 0000000000000000 ]---