* [bug report] kernel panic at _find_next_zero_bit in io_uring testing
@ 2023-03-25 7:25 Guangwu Zhang
2023-03-25 10:06 ` Ming Lei
2023-03-25 13:51 ` Jens Axboe
0 siblings, 2 replies; 3+ messages in thread
From: Guangwu Zhang @ 2023-03-25 7:25 UTC (permalink / raw)
To: linux-block; +Cc: Ming Lei, Jeff Moyer
Hello,
We found this kernel panic issue with upstream kernel 6.3.0-rc3 and
it's 100% reproduced, let me know if you need more info/testing,
thanks
kernel repo : https://github.com/torvalds/linux.git
reproducer : run the testing from git://git.kernel.dk/liburing
[ 1089.762678] Running test recv-msgall-stream.t:
[ 1089.922127] Running test recv-multishot.t:
[ 1090.231772] Running test reg-hint.t:
[ 1090.282612] general protection fault, probably for non-canonical
address 0xdffffc0000000000: 0000 [#1] PREEMPT SMP KASAN NOPTI
[ 1090.294014] KASAN: null-ptr-deref in range
[0x0000000000000000-0x0000000000000007]
[ 1090.301586] CPU: 3 PID: 36765 Comm: reg-hint.t Kdump: loaded Not
tainted 6.3.0-rc3.kasan+ #1
[ 1090.310035] Hardware name: Dell Inc. PowerEdge R640/0X45NX, BIOS
2.16.1 08/17/2022
[ 1090.317612] RIP: 0010:_find_next_zero_bit+0x47/0x110
[ 1090.322603] Code: 55 48 c7 c5 ff ff ff ff 48 d3 e5 48 c1 e9 06 53
48 89 fb 4c 8d 2c cd 00 00 00 00 4e 8d 24 2f 4c 89 e6 48 83 ec 10 48
c1 ee 03 <80> 3c 16 00 0f 85 9a 00 00 00 49 8b 34 24 48 f7 d6 48 21 ee
75 4b
[ 1090.341358] RSP: 0018:ffff88848659fb68 EFLAGS: 00010246
[ 1090.346601] RAX: 0000000000000010 RBX: 0000000000000000 RCX: 0000000000000000
[ 1090.353742] RDX: dffffc0000000000 RSI: 0000000000000000 RDI: 0000000000000000
[ 1090.360882] RBP: ffffffffffffffff R08: ffff888118b22704 R09: ffff888118b22717
[ 1090.368024] R10: ffffed10231644e2 R11: 0000000000000001 R12: 0000000000000000
[ 1090.375167] R13: 0000000000000000 R14: ffff8884c5c1a000 R15: 0000000000000000
[ 1090.382307] FS: 00007fd9683a6740(0000) GS:ffff88887f680000(0000)
knlGS:0000000000000000
[ 1090.390403] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
[ 1090.396158] CR2: 0000000000404060 CR3: 0000000486274006 CR4: 00000000007706e0
[ 1090.403297] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
[ 1090.410439] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
[ 1090.417580] PKRU: 55555554
[ 1090.420292] Call Trace:
[ 1090.422748] <TASK>
[ 1090.424862] __io_fixed_fd_install+0x136/0x1d0
[ 1090.429328] io_fixed_fd_install+0x4c/0xc0
[ 1090.433444] io_socket+0x282/0x3b0
[ 1090.436866] io_issue_sqe+0x153/0xeb0
[ 1090.440549] io_submit_sqes+0x41d/0xcd0
[ 1090.444407] __do_sys_io_uring_enter+0x4e9/0x830
[ 1090.449044] ? __pfx___do_sys_io_uring_enter+0x10/0x10
[ 1090.454197] ? __pfx___handle_mm_fault+0x10/0x10
[ 1090.458833] ? __pfx_mt_find+0x10/0x10
[ 1090.462601] do_syscall_64+0x59/0x90
[ 1090.466196] ? handle_mm_fault+0x1a0/0x660
[ 1090.470311] ? up_read+0x1c/0xb0
[ 1090.473560] ? do_user_addr_fault+0x313/0xeb0
[ 1090.477935] ? syscall_exit_work+0x103/0x130
[ 1090.482227] ? exc_page_fault+0x57/0xc0
[ 1090.486084] entry_SYSCALL_64_after_hwframe+0x72/0xdc
[ 1090.491153] RIP: 0033:0x402f3e
[ 1090.494221] Code: 41 89 ca 8b ba cc 00 00 00 41 b9 08 00 00 00 b8
aa 01 00 00 41 83 ca 10 f6 82 d0 00 00 00 01 44 0f 44 d1 45 31 c0 31
d2 0f 05 <c3> 90 89 30 eb 99 0f 1f 40 00 8b 3f 45 31 c0 83 e7 06 41 0f
95 c0
[ 1090.512975] RSP: 002b:00007ffeb6c4ee98 EFLAGS: 00000246 ORIG_RAX:
00000000000001aa
[ 1090.520556] RAX: ffffffffffffffda RBX: 0000000000000000 RCX: 0000000000402f3e
[ 1090.527697] RDX: 0000000000000000 RSI: 0000000000000001 RDI: 0000000000000003
[ 1090.534830] RBP: 0000000000000001 R08: 0000000000000000 R09: 0000000000000008
[ 1090.541965] R10: 0000000000000000 R11: 0000000000000246 R12: 00007ffeb6c4f0a8
[ 1090.549106] R13: 0000000000401860 R14: 0000000000406e08 R15: 00007fd9683e9000
[ 1090.556253] </TASK>
^ permalink raw reply [flat|nested] 3+ messages in thread
* Re: [bug report] kernel panic at _find_next_zero_bit in io_uring testing
2023-03-25 7:25 [bug report] kernel panic at _find_next_zero_bit in io_uring testing Guangwu Zhang
@ 2023-03-25 10:06 ` Ming Lei
2023-03-25 13:51 ` Jens Axboe
1 sibling, 0 replies; 3+ messages in thread
From: Ming Lei @ 2023-03-25 10:06 UTC (permalink / raw)
To: Guangwu Zhang; +Cc: linux-block, Jeff Moyer
Hi Guang Wu,
On Sat, Mar 25, 2023 at 03:25:34PM +0800, Guangwu Zhang wrote:
> Hello,
>
> We found this kernel panic issue with upstream kernel 6.3.0-rc3 and
> it's 100% reproduced, let me know if you need more info/testing,
> thanks
>
> kernel repo : https://github.com/torvalds/linux.git
> reproducer : run the testing from git://git.kernel.dk/liburing
>
> [ 1089.762678] Running test recv-msgall-stream.t:
> [ 1089.922127] Running test recv-multishot.t:
> [ 1090.231772] Running test reg-hint.t:
> [ 1090.282612] general protection fault, probably for non-canonical
> address 0xdffffc0000000000: 0000 [#1] PREEMPT SMP KASAN NOPTI
> [ 1090.294014] KASAN: null-ptr-deref in range
The issue is fixed by:
https://git.kernel.org/pub/scm/linux/kernel/git/axboe/linux-block.git/commit/?h=io_uring-6.3&id=02a4d923e4400a36d340ea12d8058f69ebf3a383
since liburing merges test case quicker than kernel fix, :-)
BTW, please report io_uring issue on io-uring@vger.kernel.org next time.
thanks,
Ming
^ permalink raw reply [flat|nested] 3+ messages in thread
* Re: [bug report] kernel panic at _find_next_zero_bit in io_uring testing
2023-03-25 7:25 [bug report] kernel panic at _find_next_zero_bit in io_uring testing Guangwu Zhang
2023-03-25 10:06 ` Ming Lei
@ 2023-03-25 13:51 ` Jens Axboe
1 sibling, 0 replies; 3+ messages in thread
From: Jens Axboe @ 2023-03-25 13:51 UTC (permalink / raw)
To: Guangwu Zhang, linux-block; +Cc: Ming Lei, Jeff Moyer
On 3/25/23 1:25 AM, Guangwu Zhang wrote:
> Hello,
>
> We found this kernel panic issue with upstream kernel 6.3.0-rc3 and
> it's 100% reproduced, let me know if you need more info/testing,
> thanks
>
> kernel repo : https://github.com/torvalds/linux.git
> reproducer : run the testing from git://git.kernel.dk/liburing
>
> [ 1089.762678] Running test recv-msgall-stream.t:
> [ 1089.922127] Running test recv-multishot.t:
> [ 1090.231772] Running test reg-hint.t:
> [ 1090.282612] general protection fault, probably for non-canonical
> address 0xdffffc0000000000: 0000 [#1] PREEMPT SMP KASAN NOPTI
> [ 1090.294014] KASAN: null-ptr-deref in range
> [0x0000000000000000-0x0000000000000007]
> [ 1090.301586] CPU: 3 PID: 36765 Comm: reg-hint.t Kdump: loaded Not
> tainted 6.3.0-rc3.kasan+ #1
> [ 1090.310035] Hardware name: Dell Inc. PowerEdge R640/0X45NX, BIOS
> 2.16.1 08/17/2022
> [ 1090.317612] RIP: 0010:_find_next_zero_bit+0x47/0x110
> [ 1090.322603] Code: 55 48 c7 c5 ff ff ff ff 48 d3 e5 48 c1 e9 06 53
> 48 89 fb 4c 8d 2c cd 00 00 00 00 4e 8d 24 2f 4c 89 e6 48 83 ec 10 48
> c1 ee 03 <80> 3c 16 00 0f 85 9a 00 00 00 49 8b 34 24 48 f7 d6 48 21 ee
> 75 4b
> [ 1090.341358] RSP: 0018:ffff88848659fb68 EFLAGS: 00010246
> [ 1090.346601] RAX: 0000000000000010 RBX: 0000000000000000 RCX: 0000000000000000
> [ 1090.353742] RDX: dffffc0000000000 RSI: 0000000000000000 RDI: 0000000000000000
> [ 1090.360882] RBP: ffffffffffffffff R08: ffff888118b22704 R09: ffff888118b22717
> [ 1090.368024] R10: ffffed10231644e2 R11: 0000000000000001 R12: 0000000000000000
> [ 1090.375167] R13: 0000000000000000 R14: ffff8884c5c1a000 R15: 0000000000000000
> [ 1090.382307] FS: 00007fd9683a6740(0000) GS:ffff88887f680000(0000)
> knlGS:0000000000000000
> [ 1090.390403] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
> [ 1090.396158] CR2: 0000000000404060 CR3: 0000000486274006 CR4: 00000000007706e0
> [ 1090.403297] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
> [ 1090.410439] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
> [ 1090.417580] PKRU: 55555554
> [ 1090.420292] Call Trace:
> [ 1090.422748] <TASK>
> [ 1090.424862] __io_fixed_fd_install+0x136/0x1d0
> [ 1090.429328] io_fixed_fd_install+0x4c/0xc0
> [ 1090.433444] io_socket+0x282/0x3b0
> [ 1090.436866] io_issue_sqe+0x153/0xeb0
> [ 1090.440549] io_submit_sqes+0x41d/0xcd0
> [ 1090.444407] __do_sys_io_uring_enter+0x4e9/0x830
> [ 1090.449044] ? __pfx___do_sys_io_uring_enter+0x10/0x10
> [ 1090.454197] ? __pfx___handle_mm_fault+0x10/0x10
> [ 1090.458833] ? __pfx_mt_find+0x10/0x10
> [ 1090.462601] do_syscall_64+0x59/0x90
> [ 1090.466196] ? handle_mm_fault+0x1a0/0x660
> [ 1090.470311] ? up_read+0x1c/0xb0
> [ 1090.473560] ? do_user_addr_fault+0x313/0xeb0
> [ 1090.477935] ? syscall_exit_work+0x103/0x130
> [ 1090.482227] ? exc_page_fault+0x57/0xc0
> [ 1090.486084] entry_SYSCALL_64_after_hwframe+0x72/0xdc
> [ 1090.491153] RIP: 0033:0x402f3e
> [ 1090.494221] Code: 41 89 ca 8b ba cc 00 00 00 41 b9 08 00 00 00 b8
> aa 01 00 00 41 83 ca 10 f6 82 d0 00 00 00 01 44 0f 44 d1 45 31 c0 31
> d2 0f 05 <c3> 90 89 30 eb 99 0f 1f 40 00 8b 3f 45 31 c0 83 e7 06 41 0f
> 95 c0
> [ 1090.512975] RSP: 002b:00007ffeb6c4ee98 EFLAGS: 00000246 ORIG_RAX:
> 00000000000001aa
> [ 1090.520556] RAX: ffffffffffffffda RBX: 0000000000000000 RCX: 0000000000402f3e
> [ 1090.527697] RDX: 0000000000000000 RSI: 0000000000000001 RDI: 0000000000000003
> [ 1090.534830] RBP: 0000000000000001 R08: 0000000000000000 R09: 0000000000000008
> [ 1090.541965] R10: 0000000000000000 R11: 0000000000000246 R12: 00007ffeb6c4f0a8
> [ 1090.549106] R13: 0000000000401860 R14: 0000000000406e08 R15: 00007fd9683e9000
> [ 1090.556253] </TASK>
What Ming said, but also there's never any need to report a bug caused
by a liburing regression test, since we're the ones that make those
anyway... The only exception is if it's triggering something that
didn't trigger before, eg we've regressed. If you look at the test
case you reported, I just added that a few days ago, and its intent
is very much to trigger this bug that got fixed here:
https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/commit/?id=02a4d923e4400a36d340ea12d8058f69ebf3a383
--
Jens Axboe
^ permalink raw reply [flat|nested] 3+ messages in thread
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2023-03-25 7:25 [bug report] kernel panic at _find_next_zero_bit in io_uring testing Guangwu Zhang
2023-03-25 10:06 ` Ming Lei
2023-03-25 13:51 ` Jens Axboe
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