WARNING in process_measurement
Roberto Sassu
roberto.sassu at huaweicloud.com
Wed Sep 11 14:05:18 UTC 2024
On Wed, 2024-09-04 at 19:23 -0700, Xingyu Li wrote:
> Here is to set up the reproducing environment:
> https://github.com/TomAPU/Linux610BugReort
> It can reproduce on our end.
Thank you.
I actually reproduced the bug... but failed somewhere else.
[ 804.974007][ T7733] INFO: trying to register non-static key.
[ 804.974702][ T7733] The code is fine but needs lockdep annotation, or maybe
[ 804.975414][ T7733] you didn't initialize this object before use?
[ 804.976059][ T7733] turning off the locking correctness validator.
[ 804.976711][ T7733] CPU: 0 PID: 7733 Comm: systemd-journal Not tainted 6.10.0 #2628
[ 804.977517][ T7733] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.15.0-1 04/01/2014
[ 804.978448][ T7733] Call Trace:
[ 804.978810][ T7733] <TASK>
[ 804.979129][ T7733] dump_stack_lvl+0x225/0x350
[ 804.979674][ T7733] ? __pfx_dump_stack_lvl+0x10/0x10
[ 804.980270][ T7733] ? __pfx__printk+0x10/0x10
[ 804.980789][ T7733] ? srso_return_thunk+0x5/0x5f
[ 804.981325][ T7733] ? __is_module_percpu_address+0x394/0x410
[ 804.981976][ T7733] ? __module_address+0x2e/0x500
[ 804.982519][ T7733] assign_lock_key+0x238/0x270
[ 804.983042][ T7733] ? __pfx_assign_lock_key+0x10/0x10
[ 804.983623][ T7733] register_lock_class+0x1c4/0x960
[ 804.984188][ T7733] ? __pfx___lock_acquire+0x10/0x10
[ 804.984753][ T7733] ? __pfx_register_lock_class+0x10/0x10
[ 804.985363][ T7733] ? __pfx___lock_acquire+0x10/0x10
[ 804.985930][ T7733] __lock_acquire+0x193/0x7ac0
[ 804.986457][ T7733] ? srso_return_thunk+0x5/0x5f
[ 804.987000][ T7733] ? srso_return_thunk+0x5/0x5f
[ 804.987538][ T7733] ? mark_lock+0x97/0x320
[ 804.988023][ T7733] ? srso_return_thunk+0x5/0x5f
[ 804.988556][ T7733] ? __pfx___lock_acquire+0x10/0x10
[ 804.989125][ T7733] ? __might_fault+0xac/0x120
[ 804.989648][ T7733] ? _copy_to_iter+0x26e/0x1bf0
[ 804.990191][ T7733] ? timerfd_read_iter+0x840/0x9f0
[ 804.990756][ T7733] ? __pfx___lock_acquire+0x10/0x10
[ 804.991316][ T7733] ? lockdep_hardirqs_on_prepare+0x440/0x7a0
[ 804.991955][ T7733] ? __pfx__copy_to_iter+0x10/0x10
[ 804.992504][ T7733] ? __pfx_lockdep_hardirqs_on_prepare+0x10/0x10
[ 804.993157][ T7733] ? _raw_spin_lock_irq+0xdb/0x120
[ 804.993701][ T7733] lock_acquire+0x1f2/0x580
[ 804.994181][ T7733] ? __set_current_blocked+0x122/0x360
[ 804.994758][ T7733] ? lockdep_hardirqs_on+0x95/0x140
[ 804.995319][ T7733] ? __pfx_lock_acquire+0x10/0x10
[ 804.995862][ T7733] ? end_current_label_crit_section+0x147/0x170
[ 804.996525][ T7733] ? srso_return_thunk+0x5/0x5f
[ 804.997050][ T7733] _raw_spin_lock_irq+0xcf/0x120
[ 804.997577][ T7733] ? __set_current_blocked+0x122/0x360
[ 804.998144][ T7733] ? __pfx__raw_spin_lock_irq+0x10/0x10
[ 804.998726][ T7733] ? __might_fault+0xac/0x120
[ 804.999228][ T7733] __set_current_blocked+0x122/0x360
[ 804.999807][ T7733] ? __pfx___set_current_blocked+0x10/0x10
[ 805.000418][ T7733] ? __might_fault+0xac/0x120
[ 805.000918][ T7733] ? __might_fault+0xc8/0x120
[ 805.001427][ T7733] ? __might_fault+0xac/0x120
[ 805.001941][ T7733] __se_sys_rt_sigprocmask+0x2ed/0x3b0
[ 805.002521][ T7733] ? __pfx___se_sys_rt_sigprocmask+0x10/0x10
[ 805.003143][ T7733] ? lockdep_hardirqs_on_prepare+0x440/0x7a0
[ 805.003788][ T7733] ? srso_return_thunk+0x5/0x5f
[ 805.004302][ T7733] ? __secure_computing+0x110/0x2f0
[ 805.004865][ T7733] ? srso_return_thunk+0x5/0x5f
[ 805.005386][ T7733] ? srso_return_thunk+0x5/0x5f
[ 805.005914][ T7733] do_syscall_64+0x7b/0x150
[ 805.006399][ T7733] entry_SYSCALL_64_after_hwframe+0x76/0x7e
[ 805.007022][ T7733] RIP: 0033:0x7f7734e529b8
[ 805.007492][ T7733] Code: 48 85 f6 74 15 48 b9 00 00 00 80 01 00 00 00 48 8b 06 48 85 c8 75 3b 48 89 f0 48 89 c6 41 ba 08 00 00 00 b8 0e 00 00 00 0f 05 <89> c2 f7 da 3d 00 f0 ff ff b8 00 00 00 00 0f 47 c2 48 8b 55 f8 64
[ 805.009399][ T7733] RSP: 002b:00007ffea0fab1b0 EFLAGS: 00000246 ORIG_RAX: 000000000000000e
[ 805.010272][ T7733] RAX: ffffffffffffffda RBX: 000055fca9860590 RCX: 00007f7734e529b8
[ 805.011083][ T7733] RDX: 00007ffea0fab250 RSI: 00007ffea0fab2d0 RDI: 0000000000000000
[ 805.011892][ T7733] RBP: 00007ffea0fab240 R08: 000055fca986d40c R09: 000055fca9861eec
[ 805.012691][ T7733] R10: 0000000000000008 R11: 0000000000000246 R12: 00007ffea0fab2d0
[ 805.013499][ T7733] R13: 00007ffea0fab250 R14: 00007ffea0fab438 R15: 00007ffea0fab440
[ 805.014318][ T7733] </TASK>
[ 805.019958][ T7733] ------------[ cut here ]------------
[ 805.020530][ T7733] refcount_t: addition on 0; use-after-free.
[ 805.021779][ T7733] WARNING: CPU: 0 PID: 7733 at lib/refcount.c:25 refcount_warn_saturate+0x130/0x1b0
[ 805.022754][ T7733] Modules linked in:
[ 805.023160][ T7733] CPU: 0 PID: 7733 Comm: systemd-journal Not tainted 6.10.0 #2628
[ 805.023963][ T7733] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.15.0-1 04/01/2014
[ 805.024862][ T7733] RIP: 0010:refcount_warn_saturate+0x130/0x1b0
[ 805.025532][ T7733] Code: 0a 01 48 c7 c7 40 a0 db 8b e8 9c 89 ec fc 0f 0b eb bf e8 e3 fe 29 fd c6 05 05 b3 e3 0a 01 48 c7 c7 a0 a0 db 8b e8 80 89 ec fc <0f> 0b eb a3 e8 c7 fe 29 fd c6 05 ea b2 e3 0a 01 48 c7 c7 00 a1 db
[ 805.027498][ T7733] RSP: 0018:ffffc9000aaf7a50 EFLAGS: 00010246
[ 805.028153][ T7733] RAX: 1c6d5d6d27f73700 RBX: 0000000000000002 RCX: ffff88807f069e00
[ 805.028983][ T7733] RDX: 0000000000000000 RSI: 0000000000000000 RDI: 0000000000000000
[ 805.029803][ T7733] RBP: 0000000000000000 R08: ffff888061a28cd3 R09: 1ffff1100c34519a
[ 805.030637][ T7733] R10: dffffc0000000000 R11: ffffed100c34519b R12: dffffc0000000000
[ 805.031504][ T7733] R13: ffff88801f1ed0d0 R14: ffff88801ce9ca40 R15: ffff88801f1ebc00
[ 805.032342][ T7733] FS: 00007f7734588940(0000) GS:ffff888061a00000(0000) knlGS:0000000000000000
[ 805.033274][ T7733] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
[ 805.033960][ T7733] CR2: 00007f77339da000 CR3: 000000007f8c0000 CR4: 0000000000350ef0
[ 805.034797][ T7733] Call Trace:
[ 805.035156][ T7733] <TASK>
[ 805.035477][ T7733] ? __warn+0x160/0x4d0
[ 805.035938][ T7733] ? refcount_warn_saturate+0x130/0x1b0
[ 805.036547][ T7733] ? refcount_warn_saturate+0x130/0x1b0
[ 805.037160][ T7733] ? report_bug+0x2bd/0x500
[ 805.037662][ T7733] ? refcount_warn_saturate+0x130/0x1b0
[ 805.038277][ T7733] ? handle_bug+0x3d/0x80
[ 805.038749][ T7733] ? exc_invalid_op+0x16/0x50
[ 805.039262][ T7733] ? asm_exc_invalid_op+0x16/0x20
[ 805.039837][ T7733] ? refcount_warn_saturate+0x130/0x1b0
[ 805.040450][ T7733] copy_sighand+0x213/0x240
[ 805.040958][ T7733] copy_process+0x1780/0x3e30
[ 805.041518][ T7733] ? copy_process+0xa3d/0x3e30
[ 805.042052][ T7733] ? __pfx___cant_migrate+0x10/0x10
[ 805.042626][ T7733] ? __pfx_copy_process+0x10/0x10
[ 805.043181][ T7733] ? srso_return_thunk+0x5/0x5f
[ 805.043719][ T7733] ? migrate_disable+0xc9/0x180
[ 805.044254][ T7733] ? srso_return_thunk+0x5/0x5f
[ 805.044794][ T7733] ? __seccomp_filter+0x96a/0x21e0
[ 805.045358][ T7733] kernel_clone+0x21e/0x8e0
[ 805.045860][ T7733] ? srso_return_thunk+0x5/0x5f
[ 805.046395][ T7733] ? __pfx_kernel_clone+0x10/0x10
[ 805.046957][ T7733] ? __set_current_blocked+0x2f7/0x360
[ 805.047558][ T7733] __x64_sys_clone+0x289/0x300
[ 805.048096][ T7733] ? __pfx___x64_sys_clone+0x10/0x10
[ 805.048692][ T7733] ? srso_return_thunk+0x5/0x5f
[ 805.049228][ T7733] ? syscall_trace_enter+0xa8/0x150
[ 805.049800][ T7733] do_syscall_64+0x7b/0x150
[ 805.050293][ T7733] entry_SYSCALL_64_after_hwframe+0x76/0x7e
[ 805.050934][ T7733] RIP: 0033:0x7f7734ed1866
[ 805.051447][ T7733] Code: 85 ff 74 3e 48 83 e6 f0 74 38 48 89 4e f8 48 83 ee 10 48 89 3e 48 89 d7 4c 89 c2 4d 89 c8 4c 8b 54 24 08 b8 38 00 00 00 0f 05 <48> 85 c0 7c 13 74 01 c3 31 ed 58 5f ff d0 48 89 c7 b8 3c 00 00 00
[ 805.053459][ T7733] RSP: 002b:00007ffea0faaff8 EFLAGS: 00000202 ORIG_RAX: 0000000000000038
[ 805.054344][ T7733] RAX: ffffffffffffffda RBX: 00007f7734e4b650 RCX: 00007f7734ed1866
[ 805.055175][ T7733] RDX: 00007f7733200990 RSI: 00007f77331ffd70 RDI: 00000000003d0f00
[ 805.056014][ T7733] RBP: 00007ffea0fab040 R08: 00007f77332006c0 R09: 00007f77332006c0
[ 805.056846][ T7733] R10: 00007f7733200990 R11: 0000000000000202 R12: 00007f77332006c0
[ 805.057669][ T7733] R13: fffffffffffffda8 R14: 0000000000000002 R15: 00007ffea0fab060
[ 805.058514][ T7733] </TASK>
[ 805.058854][ T7733] Kernel panic - not syncing: kernel: panic_on_warn set ...
[ 805.059619][ T7733] CPU: 0 PID: 7733 Comm: systemd-journal Not tainted 6.10.0 #2628
[ 805.060444][ T7733] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.15.0-1 04/01/2014
[ 805.061394][ T7733] Call Trace:
[ 805.061755][ T7733] <TASK>
[ 805.062077][ T7733] dump_stack_lvl+0x225/0x350
[ 805.062594][ T7733] ? __pfx_dump_stack_lvl+0x10/0x10
[ 805.063160][ T7733] ? __pfx__printk+0x10/0x10
[ 805.063680][ T7733] ? _printk+0xcc/0x120
[ 805.064171][ T7733] ? srso_return_thunk+0x5/0x5f
[ 805.064711][ T7733] panic+0x346/0x850
[ 805.065158][ T7733] ? __pfx_panic+0x10/0x10
[ 805.065662][ T7733] ? srso_return_thunk+0x5/0x5f
[ 805.066216][ T7733] __warn+0x342/0x4d0
[ 805.066652][ T7733] ? refcount_warn_saturate+0x130/0x1b0
[ 805.067264][ T7733] ? refcount_warn_saturate+0x130/0x1b0
[ 805.067888][ T7733] report_bug+0x2bd/0x500
[ 805.068374][ T7733] ? refcount_warn_saturate+0x130/0x1b0
[ 805.068990][ T7733] handle_bug+0x3d/0x80
[ 805.069477][ T7733] exc_invalid_op+0x16/0x50
[ 805.069979][ T7733] asm_exc_invalid_op+0x16/0x20
[ 805.070518][ T7733] RIP: 0010:refcount_warn_saturate+0x130/0x1b0
[ 805.071196][ T7733] Code: 0a 01 48 c7 c7 40 a0 db 8b e8 9c 89 ec fc 0f 0b eb bf e8 e3 fe 29 fd c6 05 05 b3 e3 0a 01 48 c7 c7 a0 a0 db 8b e8 80 89 ec fc <0f> 0b eb a3 e8 c7 fe 29 fd c6 05 ea b2 e3 0a 01 48 c7 c7 00 a1 db
[ 805.073233][ T7733] RSP: 0018:ffffc9000aaf7a50 EFLAGS: 00010246
[ 805.073887][ T7733] RAX: 1c6d5d6d27f73700 RBX: 0000000000000002 RCX: ffff88807f069e00
[ 805.074711][ T7733] RDX: 0000000000000000 RSI: 0000000000000000 RDI: 0000000000000000
[ 805.075528][ T7733] RBP: 0000000000000000 R08: ffff888061a28cd3 R09: 1ffff1100c34519a
[ 805.076388][ T7733] R10: dffffc0000000000 R11: ffffed100c34519b R12: dffffc0000000000
[ 805.077211][ T7733] R13: ffff88801f1ed0d0 R14: ffff88801ce9ca40 R15: ffff88801f1ebc00
[ 805.078058][ T7733] copy_sighand+0x213/0x240
[ 805.078560][ T7733] copy_process+0x1780/0x3e30
[ 805.079110][ T7733] ? copy_process+0xa3d/0x3e30
[ 805.079640][ T7733] ? __pfx___cant_migrate+0x10/0x10
[ 805.080208][ T7733] ? __pfx_copy_process+0x10/0x10
[ 805.080754][ T7733] ? srso_return_thunk+0x5/0x5f
[ 805.081285][ T7733] ? migrate_disable+0xc9/0x180
[ 805.081810][ T7733] ? srso_return_thunk+0x5/0x5f
[ 805.082340][ T7733] ? __seccomp_filter+0x96a/0x21e0
[ 805.082897][ T7733] kernel_clone+0x21e/0x8e0
[ 805.083392][ T7733] ? srso_return_thunk+0x5/0x5f
[ 805.083936][ T7733] ? __pfx_kernel_clone+0x10/0x10
[ 805.084491][ T7733] ? __set_current_blocked+0x2f7/0x360
[ 805.085082][ T7733] __x64_sys_clone+0x289/0x300
[ 805.085616][ T7733] ? __pfx___x64_sys_clone+0x10/0x10
[ 805.086208][ T7733] ? srso_return_thunk+0x5/0x5f
[ 805.086733][ T7733] ? syscall_trace_enter+0xa8/0x150
[ 805.087300][ T7733] do_syscall_64+0x7b/0x150
[ 805.087798][ T7733] entry_SYSCALL_64_after_hwframe+0x76/0x7e
[ 805.088430][ T7733] RIP: 0033:0x7f7734ed1866
[ 805.088902][ T7733] Code: 85 ff 74 3e 48 83 e6 f0 74 38 48 89 4e f8 48 83 ee 10 48 89 3e 48 89 d7 4c 89 c2 4d 89 c8 4c 8b 54 24 08 b8 38 00 00 00 0f 05 <48> 85 c0 7c 13 74 01 c3 31 ed 58 5f ff d0 48 89 c7 b8 3c 00 00 00
[ 805.090857][ T7733] RSP: 002b:00007ffea0faaff8 EFLAGS: 00000202 ORIG_RAX: 0000000000000038
[ 805.091726][ T7733] RAX: ffffffffffffffda RBX: 00007f7734e4b650 RCX: 00007f7734ed1866
[ 805.092553][ T7733] RDX: 00007f7733200990 RSI: 00007f77331ffd70 RDI: 00000000003d0f00
[ 805.093370][ T7733] RBP: 00007ffea0fab040 R08: 00007f77332006c0 R09: 00007f77332006c0
[ 805.094187][ T7733] R10: 00007f7733200990 R11: 0000000000000202 R12: 00007f77332006c0
[ 805.095009][ T7733] R13: fffffffffffffda8 R14: 0000000000000002 R15: 00007ffea0fab060
[ 805.095853][ T7733] </TASK>
[ 805.096265][ T7733] Kernel Offset: disabled
[ 805.096726][ T7733] Rebooting in 86400 seconds..
Roberto
> On Tue, Sep 3, 2024 at 2:06 AM Roberto Sassu
> <roberto.sassu at huaweicloud.com> wrote:
> >
> > On Thu, 2024-08-29 at 16:28 -0700, Xingyu Li wrote:
> > > Here is the config file:
> > > https://gist.github.com/TomAPU/64f5db0fe976a3e94a6dd2b621887cdd
> >
> > Thanks, still cannot reproduce:
> >
> > 13151 ioctl(5, SIOCGIFINDEX, {ifr_name="wpan0", ifr_ifindex=11}) = 0
> > 13151 close(5) = 0
> > 13151 sendto(4, [{nlmsg_len=36, nlmsg_type=nl802154, nlmsg_flags=NLM_F_REQUEST|NLM_F_ACK, nlmsg_seq=0, nlmsg_pid=0}, "\x0b\x00\x00\x00\x08\x00\x03\x00\x0b\x00\x00\x00\x06\x00\x0a\x00\xa0\xaa\x00\x00"], 36, 0, {sa_family=AF_NETLINK, nl_pid=0, nl_groups=00000000}, 12) = 36
> > 13151 recvfrom(4, [{nlmsg_len=56, nlmsg_type=NLMSG_ERROR, nlmsg_flags=0, nlmsg_seq=0, nlmsg_pid=13151}, {error=-EBUSY, msg=[{nlmsg_len=36, nlmsg_type=nl802154, nlmsg_flags=NLM_F_REQUEST|NLM_F_ACK, nlmsg_seq=0, nlmsg_pid=0}, "\x0b\x00\x00\x00\x08\x00\x03\x00\x0b\x00\x00\x00\x06\x00\x0a\x00\xa0\xaa\x00\x00"]}], 4096, 0, NULL, NULL) = 56
> >
> > I also get:
> >
> > [ 824.654761] ieee802154 phy0 wpan0: encryption failed: -22
> > [ 824.655606] ieee802154 phy1 wpan1: encryption failed: -22
> >
> > Roberto
> >
> > > On Thu, Aug 29, 2024 at 5:56 AM Roberto Sassu
> > > <roberto.sassu at huaweicloud.com> wrote:
> > > >
> > > > On 8/29/2024 12:53 PM, Xingyu Li wrote:
> > > > > The above syzkaller reproducer needs additional support. And here is
> > > > > the C reproducer:
> > > > > https://gist.github.com/freexxxyyy/c3d1ccb8104af6b0d51ed50c29b363d3
> > > >
> > > > Hi Xingyu
> > > >
> > > > do you have a .config for testing?
> > > >
> > > > Thanks
> > > >
> > > > Roberto
> > > >
> > > > > On Sat, Aug 24, 2024 at 10:23 PM Xingyu Li <xli399 at ucr.edu> wrote:
> > > > > >
> > > > > > Hi,
> > > > > >
> > > > > > We found a bug in Linux 6.10. This is likely a mutex corruption bug,
> > > > > > where the mutex's internal state has been compromised, leading to an
> > > > > > integrity check failure. The bug occurs in
> > > > > > https://elixir.bootlin.com/linux/v6.10/source/security/integrity/ima/ima_main.c#L269.
> > > > > >
> > > > > > The bug report and syzkaller reproducer are as follows:
> > > > > >
> > > > > > Bug report:
> > > > > >
> > > > > > DEBUG_LOCKS_WARN_ON(lock->magic != lock)
> > > > > > WARNING: CPU: 0 PID: 8057 at kernel/locking/mutex.c:587
> > > > > > __mutex_lock_common kernel/locking/mutex.c:587 [inline]
> > > > > > WARNING: CPU: 0 PID: 8057 at kernel/locking/mutex.c:587
> > > > > > __mutex_lock+0xc2d/0xd50 kernel/locking/mutex.c:752
> > > > > > Modules linked in:
> > > > > > CPU: 0 PID: 8057 Comm: cron Not tainted 6.10.0 #13
> > > > > > Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.15.0-1 04/01/2014
> > > > > > RIP: 0010:__mutex_lock_common kernel/locking/mutex.c:587 [inline]
> > > > > > RIP: 0010:__mutex_lock+0xc2d/0xd50 kernel/locking/mutex.c:752
> > > > > > Code: 04 20 84 c0 0f 85 13 01 00 00 83 3d fc e5 23 04 00 0f 85 e9 f4
> > > > > > ff ff 48 c7 c7 60 70 4c 8b 48 c7 c6 e0 70 4c 8b e8 83 f4 54 f6 <0f> 0b
> > > > > > e9 cf f4 ff ff 0f 0b e9 dc f8 ff ff 0f 0b e9 5b f5 ff ff 48
> > > > > > RSP: 0018:ffffc9000aa77380 EFLAGS: 00010246
> > > > > > RAX: 26a6b2d2d0cdac00 RBX: 0000000000000000 RCX: ffff8880241e5a00
> > > > > > RDX: 0000000000000000 RSI: 0000000000000000 RDI: 0000000000000000
> > > > > > RBP: ffffc9000aa774d0 R08: ffffffff8155a25a R09: 1ffff1100c74519a
> > > > > > R10: dffffc0000000000 R11: ffffed100c74519b R12: dffffc0000000000
> > > > > > R13: ffff888020efc330 R14: 0000000000000000 R15: 1ffff9200154eeb8
> > > > > > FS: 00007f902ffb1840(0000) GS:ffff888063a00000(0000) knlGS:0000000000000000
> > > > > > CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
> > > > > > CR2: 00007f902fb7e06a CR3: 0000000018c3c000 CR4: 0000000000350ef0
> > > > > > DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
> > > > > > DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
> > > > > > Call Trace:
> > > > > > <TASK>
> > > > > > process_measurement+0x536/0x1ff0 security/integrity/ima/ima_main.c:269
> > > > > > ima_file_check+0xec/0x170 security/integrity/ima/ima_main.c:572
> > > > > > security_file_post_open+0x51/0xb0 security/security.c:2982
> > > > > > do_open fs/namei.c:3656 [inline]
> > > > > > path_openat+0x2c0b/0x3580 fs/namei.c:3813
> > > > > > do_filp_open+0x22d/0x480 fs/namei.c:3840
> > > > > > do_sys_openat2+0x13a/0x1c0 fs/open.c:1413
> > > > > > do_sys_open fs/open.c:1428 [inline]
> > > > > > __do_sys_openat fs/open.c:1444 [inline]
> > > > > > __se_sys_openat fs/open.c:1439 [inline]
> > > > > > __x64_sys_openat+0x243/0x290 fs/open.c:1439
> > > > > > do_syscall_x64 arch/x86/entry/common.c:52 [inline]
> > > > > > do_syscall_64+0x7e/0x150 arch/x86/entry/common.c:83
> > > > > > entry_SYSCALL_64_after_hwframe+0x67/0x6f
> > > > > > RIP: 0033:0x7f903019a167
> > > > > > Code: 25 00 00 41 00 3d 00 00 41 00 74 47 64 8b 04 25 18 00 00 00 85
> > > > > > c0 75 6b 44 89 e2 48 89 ee bf 9c ff ff ff b8 01 01 00 00 0f 05 <48> 3d
> > > > > > 00 f0 ff ff 0f 87 95 00 00 00 48 8b 4c 24 28 64 48 2b 0c 25
> > > > > > RSP: 002b:00007fff194600a0 EFLAGS: 00000246 ORIG_RAX: 0000000000000101
> > > > > > RAX: ffffffffffffffda RBX: 0000564dd2fb9cf0 RCX: 00007f903019a167
> > > > > > RDX: 0000000000000000 RSI: 00007f902fb7e103 RDI: 00000000ffffff9c
> > > > > > RBP: 00007f902fb7e103 R08: 0000000000000008 R09: 0000000000000001
> > > > > > R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000
> > > > > > R13: 0000564dd2fb9cf0 R14: 0000000000000001 R15: 0000000000000000
> > > > > > </TASK>
> > > > > >
> > > > > >
> > > > > > Syzkaller reproducer:
> > > > > > # {Threaded:false Repeat:true RepeatTimes:0 Procs:1 Slowdown:1
> > > > > > Sandbox: SandboxArg:0 Leak:false NetInjection:false NetDevices:false
> > > > > > NetReset:false Cgroups:false BinfmtMisc:false CloseFDs:false
> > > > > > KCSAN:false DevlinkPCI:false NicVF:false USB:false VhciInjection:false
> > > > > > Wifi:false IEEE802154:true Sysctl:true Swap:false UseTmpDir:true
> > > > > > HandleSegv:true Trace:false LegacyOptions:{Collide:false Fault:false
> > > > > > FaultCall:0 FaultNth:0}}
> > > > > > r0 = openat$ptmx(0xffffffffffffff9c, 0x0, 0x141040, 0x0)
> > > > > > ioctl$TIOCSETD(r0, 0x5423, 0x0)
> > > > > > mmap$IORING_OFF_CQ_RING(&(0x7f0000ffc000/0x4000)=nil, 0x4000, 0x2,
> > > > > > 0x20031, 0xffffffffffffffff, 0x8000000)
> > > > > > mmap$IORING_OFF_SQ_RING(&(0x7f0000ff4000/0xc000)=nil, 0xc000, 0xe,
> > > > > > 0x12, 0xffffffffffffffff, 0x0)
> > > > > > openat$sndseq(0xffffffffffffff9c, 0x0, 0x902)
> > > > > > write$syz_spec_18446744072532934322_80(0xffffffffffffffff,
> > > > > > &(0x7f0000000000)="2b952480c7ca55097d1707935ba64b20f3026c03d658026b81bf264340512b3cb4e01afda2de754299ea7a113343ab7b9bda2fc0a2e2cdbfecbca0233a0772b12ebde5d98a1203cb871672dff7e4c86ec1dccef0a76312fbe8d45dc2bd0f8fc2ebeb2a6be6a300916c5281da2c1ef64d66267091b82429976c019da3645557ed1d439c5a637f6bf58c53bc414539dd87c69098d671402586b631f9ac5c2fe9cedc281a6f005b5c4d1dd5ed9be400",
> > > > > > 0xb4)
> > > > > > r1 = syz_open_dev$sg(&(0x7f00000003c0), 0x0, 0x8000)
> > > > > > ioctl$syz_spec_1724254976_2866(r1, 0x1, &(0x7f0000000080)={0x0, 0x2,
> > > > > > [0x85, 0x8, 0x15, 0xd]})
> > > > > > ioctl$KDGKBDIACR(0xffffffffffffffff, 0x4bfa, 0x0)
> > > > > >
> > > > > >
> > > > > > --
> > > > > > Yours sincerely,
> > > > > > Xingyu
> > > > >
> > > > >
> > > > >
> > > >
> > >
> > >
> >
>
>
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