Re: [syzbot] [mm?] INFO: rcu detected stall in sys_mprotect (8)

Re: [syzbot] [mm?] INFO: rcu detected stall in sys_mprotect (8)

[syzbot]

syzbot has found a reproducer for the following issue on:

HEAD commit:    31eae6d99587 selftests: drv-net: test drivers sleeping in ..
git tree:       net-next
console output: https://syzkaller.appspot.com/x/log.txt?x=170e81df980000
kernel config:  https://syzkaller.appspot.com/x/.config?x=289acde585746aad
dashboard link: https://syzkaller.appspot.com/bug?extid=6f7c31cf5ae4944ad6f0
compiler:       Debian clang version 15.0.6, GNU ld (GNU Binutils for Debian) 2.40
syz repro:      https://syzkaller.appspot.com/x/repro.syz?x=11d7270f980000

Downloadable assets:
disk image: https://storage.googleapis.com/syzbot-assets/4718c6cc0087/disk-31eae6d9.raw.xz
vmlinux: https://storage.googleapis.com/syzbot-assets/9ad3425b5ce9/vmlinux-31eae6d9.xz
kernel image: https://storage.googleapis.com/syzbot-assets/9da77adda42e/bzImage-31eae6d9.xz

IMPORTANT: if you fix the issue, please add the following tag to the commit:
Reported-by: syzbot+6f7c31cf5ae4944ad6f0@syzkaller.appspotmail.com

rcu: INFO: rcu_preempt detected stalls on CPUs/tasks:
rcu: 	1-...!: (3 ticks this GP) idle=5abc/1/0x4000000000000000 softirq=13965/13965 fqs=0
rcu: 	(detected by 0, t=13596 jiffies, g=9241, q=718 ncpus=2)
Sending NMI from CPU 0 to CPUs 1:
NMI backtrace for cpu 1
CPU: 1 UID: 0 PID: 6085 Comm: modprobe Not tainted 6.13.0-rc5-syzkaller-00873-g31eae6d99587 #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 09/13/2024
RIP: 0010:__kasan_check_read+0xa/0x20 mm/kasan/shadow.c:31
Code: db eb d0 66 2e 0f 1f 84 00 00 00 00 00 0f 1f 00 90 90 90 90 90 90 90 90 90 90 90 90 90 90 90 90 f3 0f 1e fa 89 f6 48 8b 0c 24 <31> d2 e9 6f e6 ff ff 66 2e 0f 1f 84 00 00 00 00 00 0f 1f 44 00 00
RSP: 0018:ffffc90000a189c0 EFLAGS: 00000007
RAX: 0000000000000024 RBX: 000000000000092d RCX: ffffffff817b274a
RDX: 0000000000000008 RSI: 0000000000000008 RDI: ffffffff942bd9a0
RBP: 0000000000000008 R08: ffffffff942bd9a7 R09: 1ffffffff2857b34
R10: dffffc0000000000 R11: fffffbfff2857b35 R12: ffff88802c2d28c4
R13: dffffc0000000000 R14: 0000000000000100 R15: ffff88802c2d2908
FS:  00007f1458250380(0000) GS:ffff8880b8700000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007f14583bafe4 CR3: 0000000033060000 CR4: 00000000003526f0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Call Trace:
 <NMI>
 </NMI>
 <IRQ>
 instrument_atomic_read include/linux/instrumented.h:68 [inline]
 _test_bit include/asm-generic/bitops/instrumented-non-atomic.h:141 [inline]
 hlock_class kernel/locking/lockdep.c:228 [inline]
 mark_lock+0x9a/0x360 kernel/locking/lockdep.c:4727
 mark_usage kernel/locking/lockdep.c:4670 [inline]
 __lock_acquire+0xc3e/0x2100 kernel/locking/lockdep.c:5180
 lock_acquire+0x1ed/0x550 kernel/locking/lockdep.c:5849
 __raw_spin_lock include/linux/spinlock_api_smp.h:133 [inline]
 _raw_spin_lock+0x2e/0x40 kernel/locking/spinlock.c:154
 spin_lock include/linux/spinlock.h:351 [inline]
 advance_sched+0xab/0xca0 net/sched/sch_taprio.c:924
 __run_hrtimer kernel/time/hrtimer.c:1739 [inline]
 __hrtimer_run_queues+0x59b/0xd30 kernel/time/hrtimer.c:1803
 hrtimer_interrupt+0x403/0xa40 kernel/time/hrtimer.c:1865
 local_apic_timer_interrupt arch/x86/kernel/apic/apic.c:1038 [inline]
 __sysvec_apic_timer_interrupt+0x110/0x420 arch/x86/kernel/apic/apic.c:1055
 instr_sysvec_apic_timer_interrupt arch/x86/kernel/apic/apic.c:1049 [inline]
 sysvec_apic_timer_interrupt+0xa1/0xc0 arch/x86/kernel/apic/apic.c:1049
 </IRQ>
 <TASK>
 asm_sysvec_apic_timer_interrupt+0x1a/0x20 arch/x86/include/asm/idtentry.h:702
RIP: 0010:stack_trace_consume_entry+0xf5/0x280 kernel/stacktrace.c:93
Code: 00 fc ff df 48 8b 1b 45 8d 70 01 41 0f b6 04 17 84 c0 0f 85 31 01 00 00 45 89 31 4a 8d 1c c3 48 89 d8 48 c1 e8 03 80 3c 10 00 <74> 1a 4d 89 cf 48 89 df 49 89 d6 49 89 f5 e8 68 a2 7a 00 4d 89 f9
RSP: 0018:ffffc900030c7230 EFLAGS: 00000246
RAX: 1ffff92000618e8c RBX: ffffc900030c7460 RCX: ffffffff917a4000
RDX: dffffc0000000000 RSI: ffffffff8be00130 RDI: ffffc900030c736c
RBP: ffffc900030c7368 R08: 000000000000000c R09: ffffc900030c7370
R10: ffffc900030c72d0 R11: ffffffff818b39d0 R12: 1ffff92000618e6d
R13: 1ffff92000618e6d R14: 000000000000000d R15: 1ffff92000618e6e
 arch_stack_walk+0x10e/0x150 arch/x86/kernel/stacktrace.c:27
 stack_trace_save+0x118/0x1d0 kernel/stacktrace.c:122
 kasan_save_stack mm/kasan/common.c:47 [inline]
 kasan_save_track+0x3f/0x80 mm/kasan/common.c:68
 unpoison_slab_object mm/kasan/common.c:319 [inline]
 __kasan_slab_alloc+0x66/0x80 mm/kasan/common.c:345
 kasan_slab_alloc include/linux/kasan.h:250 [inline]
 slab_post_alloc_hook mm/slub.c:4119 [inline]
 kmem_cache_alloc_bulk_noprof+0x4fa/0x7c0 mm/slub.c:5129
 mt_alloc_bulk lib/maple_tree.c:181 [inline]
 mas_alloc_nodes+0x38e/0x7e0 lib/maple_tree.c:1275
 mas_node_count_gfp lib/maple_tree.c:1335 [inline]
 mas_preallocate+0x575/0x8d0 lib/maple_tree.c:5545
 vma_iter_prealloc mm/vma.h:349 [inline]
 __split_vma+0x302/0xc50 mm/vma.c:447
 split_vma mm/vma.c:510 [inline]
 vma_modify+0x244/0x330 mm/vma.c:1528
 vma_modify_flags+0x3a5/0x430 mm/vma.c:1546
 mprotect_fixup+0x45a/0xaa0 mm/mprotect.c:666
 do_mprotect_pkey+0x8d7/0xd70 mm/mprotect.c:840
 __do_sys_mprotect mm/mprotect.c:861 [inline]
 __se_sys_mprotect mm/mprotect.c:858 [inline]
 __x64_sys_mprotect+0x80/0x90 mm/mprotect.c:858
 do_syscall_x64 arch/x86/entry/common.c:52 [inline]
 do_syscall_64+0xf3/0x230 arch/x86/entry/common.c:83
 entry_SYSCALL_64_after_hwframe+0x77/0x7f
RIP: 0033:0x7f1458574bb7
Code: 00 00 00 b8 0b 00 00 00 0f 05 48 3d 01 f0 ff ff 73 01 c3 48 8d 0d b9 46 01 00 f7 d8 89 01 48 83 c8 ff c3 b8 0a 00 00 00 0f 05 <48> 3d 01 f0 ff ff 73 01 c3 48 8d 0d 99 46 01 00 f7 d8 89 01 48 83
RSP: 002b:00007fffaf755208 EFLAGS: 00000206 ORIG_RAX: 000000000000000a
RAX: ffffffffffffffda RBX: 00007f1458551fc0 RCX: 00007f1458574bb7
RDX: 0000000000000001 RSI: 0000000000001000 RDI: 00007f14582c9000
RBP: 00007fffaf755320 R08: 00007fffaf755198 R09: 00007f14585515c0
R10: 00007f14582a8168 R11: 0000000000000206 R12: 00007f1458551fc0
R13: 00007f145857ceda R14: 00007f14582c9f40 R15: 00007f14582c9740
 </TASK>
rcu: rcu_preempt kthread timer wakeup didn't happen for 13595 jiffies! g9241 f0x0 RCU_GP_WAIT_FQS(5) ->state=0x402
rcu: 	Possible timer handling issue on cpu=1 timer-softirq=3487
rcu: rcu_preempt kthread starved for 13596 jiffies! g9241 f0x0 RCU_GP_WAIT_FQS(5) ->state=0x402 ->cpu=1
rcu: 	Unless rcu_preempt kthread gets sufficient CPU time, OOM is now expected behavior.
rcu: RCU grace-period kthread stack dump:
task:rcu_preempt     state:I stack:25976 pid:17    tgid:17    ppid:2      flags:0x00004000
Call Trace:
 <TASK>
 context_switch kernel/sched/core.c:5369 [inline]
 __schedule+0x1850/0x4c30 kernel/sched/core.c:6756
 __schedule_loop kernel/sched/core.c:6833 [inline]
 schedule+0x14b/0x320 kernel/sched/core.c:6848
 schedule_timeout+0x15a/0x290 kernel/time/sleep_timeout.c:99
 rcu_gp_fqs_loop+0x2df/0x1330 kernel/rcu/tree.c:2045
 rcu_gp_kthread+0xa7/0x3b0 kernel/rcu/tree.c:2247
 kthread+0x2f0/0x390 kernel/kthread.c:389
 ret_from_fork+0x4b/0x80 arch/x86/kernel/process.c:147
 ret_from_fork_asm+0x1a/0x30 arch/x86/entry/entry_64.S:244
 </TASK>


---
If you want syzbot to run the reproducer, reply with:
#syz test: git://repo/address.git branch-or-commit-hash
If you attach or paste a git patch, syzbot will apply it before testing.

Re: [syzbot] [mm?] INFO: rcu detected stall in sys_mprotect (8)

[syzbot]

syzbot has bisected this issue to:

commit 5a781ccbd19e4664babcbe4b4ead7aa2b9283d22
Author: Vinicius Costa Gomes <vinicius.gomes@intel.com>
Date:   Sat Sep 29 00:59:43 2018 +0000

    tc: Add support for configuring the taprio scheduler

bisection log:  https://syzkaller.appspot.com/x/bisect.txt?x=124e5a18580000
start commit:   31eae6d99587 selftests: drv-net: test drivers sleeping in ..
git tree:       net-next
final oops:     https://syzkaller.appspot.com/x/report.txt?x=114e5a18580000
console output: https://syzkaller.appspot.com/x/log.txt?x=164e5a18580000
kernel config:  https://syzkaller.appspot.com/x/.config?x=289acde585746aad
dashboard link: https://syzkaller.appspot.com/bug?extid=6f7c31cf5ae4944ad6f0
syz repro:      https://syzkaller.appspot.com/x/repro.syz?x=11d7270f980000

Reported-by: syzbot+6f7c31cf5ae4944ad6f0@syzkaller.appspotmail.com
Fixes: 5a781ccbd19e ("tc: Add support for configuring the taprio scheduler")

For information about bisection process see: https://goo.gl/tpsmEJ#bisection

Re: [syzbot] [mm?] INFO: rcu detected stall in sys_mprotect (8)

[syzbot]

syzbot has found a reproducer for the following issue on:

HEAD commit:    303d91a15925 net: ipa: Drop unused qmi_elem_info arrays
git tree:       net-next
console output: https://syzkaller.appspot.com/x/log.txt?x=13bf72fd580000
kernel config:  https://syzkaller.appspot.com/x/.config?x=d30e1495ee3ac817
dashboard link: https://syzkaller.appspot.com/bug?extid=6f7c31cf5ae4944ad6f0
compiler:       Debian clang version 22.1.8 (1~deb13u4), Debian LLD 22.1.8
syz repro:      https://syzkaller.appspot.com/x/repro.syz?x=108e8e55580000
C reproducer:   https://syzkaller.appspot.com/x/repro.c?x=10b86bdd580000

Downloadable assets:
disk image: https://storage.googleapis.com/syzbot-assets/a7b8a5ad9a41/disk-303d91a1.raw.xz
vmlinux: https://storage.googleapis.com/syzbot-assets/74c1d7ed0168/vmlinux-303d91a1.xz
kernel image: https://storage.googleapis.com/syzbot-assets/65d8cd3261b6/bzImage-303d91a1.xz

The issue was bisected to:

commit 5a781ccbd19e4664babcbe4b4ead7aa2b9283d22
Author: Vinicius Costa Gomes <vinicius.gomes@intel.com>
Date:   Sat Sep 29 00:59:43 2018 +0000

    tc: Add support for configuring the taprio scheduler

bisection log:  https://syzkaller.appspot.com/x/bisect.txt?x=124e5a18580000
final oops:     https://syzkaller.appspot.com/x/report.txt?x=114e5a18580000
console output: https://syzkaller.appspot.com/x/log.txt?x=164e5a18580000

IMPORTANT: if you fix the issue, please add the following tag to the commit:
Reported-by: syzbot+6f7c31cf5ae4944ad6f0@syzkaller.appspotmail.com
Fixes: 5a781ccbd19e ("tc: Add support for configuring the taprio scheduler")

rcu: INFO: rcu_preempt detected stalls on CPUs/tasks:
rcu: 	1-...!: (1 GPs behind) idle=d724/1/0x4000000000000000 softirq=20067/20067 fqs=59
rcu: 	(detected by 0, t=10503 jiffies, g=19585, q=576 ncpus=2)
Sending NMI from CPU 0 to CPUs 1:
NMI backtrace for cpu 1
CPU: 1 UID: 0 PID: 6050 Comm: modprobe Not tainted syzkaller #0 PREEMPT(full) 
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 10/15/2026
RIP: 0010:__this_cpu_preempt_check+0x0/0x20 lib/smp_processor_id.c:63
Code: f5 48 8b 74 24 20 48 c7 c7 00 8d 8e 8c e8 e8 fc 24 f5 e8 b3 f8 2f f5 eb ae 90 90 90 90 90 90 90 90 90 90 90 90 90 90 90 90 90 <f3> 0f 1e fa 48 89 fe 48 c7 c7 80 8c 8e 8c e9 0d ff ff ff cc cc cc
RSP: 0018:ffffc90000a08cb8 EFLAGS: 00000046
RAX: 0000000000000001 RBX: 0000000000000001 RCX: 0000000001000001
RDX: ffff8880247f0000 RSI: ffff8880226a42c0 RDI: ffffffff8e92d683
RBP: 00000000ffffffff R08: 0000000001000001 R09: 0000000000000004
R10: dffffc0000000000 R11: fffff52000141190 R12: 0000000000000046
R13: ffff8880247f0000 R14: ffff8880226a42c0 R15: 0000000000000001
FS:  00007f2cd712ac80(0000) GS:ffff88812371f000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007f2cd7492000 CR3: 0000000078d22000 CR4: 00000000003526f0
Call Trace:
 <IRQ>
 lockdep_recursion_finish kernel/locking/lockdep.c:470 [inline]
 lock_is_held_type+0xdf/0x150 kernel/locking/lockdep.c:6017
 lock_is_held include/linux/lockdep.h:249 [inline]
 advance_sched+0x1d9/0xc80 net/sched/sch_taprio.c:944
 __run_hrtimer kernel/time/hrtimer.c:2075 [inline]
 __hrtimer_run_queues+0x3bc/0xa10 kernel/time/hrtimer.c:2132
 hrtimer_interrupt+0x4cd/0xaa0 kernel/time/hrtimer.c:2251
 local_apic_timer_interrupt arch/x86/kernel/apic/apic.c:1051 [inline]
 __sysvec_apic_timer_interrupt+0x102/0x430 arch/x86/kernel/apic/apic.c:1068
 instr_sysvec_apic_timer_interrupt arch/x86/kernel/apic/apic.c:1062 [inline]
 sysvec_apic_timer_interrupt+0xa1/0xc0 arch/x86/kernel/apic/apic.c:1062
 </IRQ>
 <TASK>
 asm_sysvec_apic_timer_interrupt+0x1a/0x20 arch/x86/include/asm/idtentry.h:674
RIP: 0010:check_kcov_mode kernel/kcov.c:179 [inline]
RIP: 0010:__sanitizer_cov_trace_pc+0x18/0x80 kernel/kcov.c:223
Code: cc cc 90 90 90 90 90 90 90 90 90 90 90 90 90 90 90 90 f3 0f 1e fa 48 8b 04 24 65 48 8b 0d 28 fa f6 12 65 48 8b 15 28 fa f6 12 <f7> c2 00 01 00 ff 74 29 89 d6 81 e6 00 01 00 0f 81 fe 00 01 00 00
RSP: 0018:ffffc9000376f4b8 EFLAGS: 00000202
RAX: ffffffff8bfb23dd RBX: 0000000000000001 RCX: ffff8880247f0000
RDX: 8000000000000000 RSI: 0000000000000001 RDI: 0000000000000000
RBP: ffff888077514e00 R08: ffff8880247f0000 R09: 0000000000000005
R10: 0000000000000004 R11: 0000000000000000 R12: ffff88807bdef180
R13: ffff88802ad9bc80 R14: 0000000000000001 R15: dffffc0000000000
 mt_slot lib/maple_tree.c:676 [inline]
 mas_next_slot+0x9dd/0xd70 lib/maple_tree.c:4228
 mas_find+0x6d6/0xcb0 lib/maple_tree.c:5451
 vma_next include/linux/mm.h:1816 [inline]
 validate_mm+0xff/0x4c0 mm/vma.c:680
 __split_vma+0x94a/0xa90 mm/vma.c:597
 split_vma mm/vma.c:626 [inline]
 vma_modify+0xa3f/0x1c50 mm/vma.c:1772
 vma_modify_flags+0x2a4/0x3c0 mm/vma.c:1792
 mprotect_fixup+0x539/0xda0 mm/mprotect.c:823
 do_mprotect_pkey+0x8e7/0xd40 mm/mprotect.c:1001
 __do_sys_mprotect mm/mprotect.c:1022 [inline]
 __se_sys_mprotect mm/mprotect.c:1019 [inline]
 __x64_sys_mprotect+0x80/0x90 mm/mprotect.c:1019
 do_syscall_x64 arch/x86/entry/syscall_64.c:61 [inline]
 do_syscall_64+0x166/0x520 arch/x86/entry/syscall_64.c:84
 entry_SYSCALL_64_after_hwframe+0x77/0x7f
RIP: 0033:0x7f2cd74c12c7
Code: 89 3d fd 3f 01 00 eb 90 0f 1f 00 f7 d8 89 05 f0 3f 01 00 48 c7 c0 ff ff ff ff eb 91 0f 1f 80 00 00 00 00 b8 0a 00 00 00 0f 05 <48> 3d 01 f0 ff ff 73 01 c3 48 8d 0d c9 3f 01 00 f7 d8 89 01 48 83
RSP: 002b:00007fff152bcf58 EFLAGS: 00000206 ORIG_RAX: 000000000000000a
RAX: ffffffffffffffda RBX: 00007f2cd74d4da0 RCX: 00007f2cd74c12c7
RDX: 0000000000000001 RSI: 0000000000002000 RDI: 00007f2cd74d2000
RBP: 00007fff152bd220 R08: 000000003de00ec7 R09: 0000000000000000
R10: 00007f2cd7205c58 R11: 0000000000000206 R12: fffffffffffffff8
R13: 000000418bb1d7ff R14: 0000000000000000 R15: 00007f2cd74d5310
 </TASK>
rcu: rcu_preempt kthread starved for 10208 jiffies! g19585 f0x0 RCU_GP_WAIT_FQS(5) ->state=R ->cpu=0
rcu: 	Unless rcu_preempt kthread gets sufficient CPU time, OOM is now expected behavior.
rcu: RCU grace-period kthread stack dump:
task:rcu_preempt     state:R  running task     stack:27496 pid:16    tgid:16    ppid:2      task_flags:0x208040 flags:0x00080000
Call Trace:
 <TASK>
 context_switch kernel/sched/core.c:5583 [inline]
 __schedule+0x17dd/0x5830 kernel/sched/core.c:7382
 __schedule_loop kernel/sched/core.c:7459 [inline]
 schedule+0x164/0x2b0 kernel/sched/core.c:7474
 schedule_timeout+0x152/0x2c0 kernel/time/sleep_timeout.c:99
 rcu_gp_fqs_loop+0x30c/0x1230 kernel/rcu/tree.c:2122
 rcu_gp_kthread+0x9c/0x340 kernel/rcu/tree.c:2330
 kthread+0x38b/0x480 kernel/kthread.c:436
 ret_from_fork+0x514/0xb70 arch/x86/kernel/process.c:158
 ret_from_fork_asm+0x1a/0x30 arch/x86/entry/entry_64.S:245
 </TASK>
rcu: Stack dump where RCU GP kthread last ran:
CPU: 0 UID: 0 PID: 5670 Comm: udevd Not tainted syzkaller #0 PREEMPT(full) 
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 10/15/2026
RIP: 0010:csd_lock_wait kernel/smp.c:389 [inline]
RIP: 0010:csd_lock kernel/smp.c:422 [inline]
RIP: 0010:smp_call_function_many_cond+0x61e/0x1500 kernel/smp.c:970
Code: b6 04 04 84 c0 0f 85 d5 03 00 00 44 8b 3b 44 89 fe 83 e6 01 31 ff e8 21 7a 0c 00 41 83 e7 01 75 07 e8 06 75 0c 00 eb 3f f3 90 <48> b8 00 00 00 00 00 fc ff df 41 0f b6 04 04 84 c0 75 0f f7 03 01
RSP: 0000:ffffc9000436f720 EFLAGS: 00000293
RAX: ffffffff81bca0ee RBX: ffff8880b8341d88 RCX: ffff888033b79f40
RDX: 0000000000000000 RSI: 0000000000000001 RDI: 0000000000000000
RBP: ffffc9000436f870 R08: ffff888033b7b4df R09: 1ffff1100676f69b
R10: dffffc0000000000 R11: ffffffff817a65a0 R12: 1ffff110170683b1
R13: 0000000000000001 R14: ffff8880b8341d80 R15: 0000000000000001
FS:  00007fe06f357880(0000) GS:ffff88812361f000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 0000557f8f49d568 CR3: 00000000692c0000 CR4: 00000000003526f0
Call Trace:
 <TASK>
 __flush_tlb_multi arch/x86/include/asm/paravirt.h:46 [inline]
 flush_tlb_multi arch/x86/mm/tlb.c:1361 [inline]
 flush_tlb_mm_range+0x910/0x10b0 arch/x86/mm/tlb.c:1435
 flush_tlb_page arch/x86/include/asm/tlbflush.h:352 [inline]
 ptep_clear_flush+0x120/0x170 mm/pgtable-generic.c:116
 wp_page_copy mm/memory.c:4136 [inline]
 do_wp_page+0x3c3a/0x4b60 mm/memory.c:4535
 handle_pte_fault mm/memory.c:6651 [inline]
 __handle_mm_fault mm/memory.c:6776 [inline]
 handle_mm_fault+0x15d7/0x3750 mm/memory.c:6943
 do_user_addr_fault+0xb35/0x1480 arch/x86/mm/fault.c:1343
 handle_page_fault arch/x86/mm/fault.c:1483 [inline]
 exc_page_fault+0x6a/0xc0 arch/x86/mm/fault.c:1536
 asm_exc_page_fault+0x26/0x30 arch/x86/include/asm/idtentry.h:595
RIP: 0033:0x7fe06f3f1b69
Code: 10 48 81 f9 ff 03 00 00 76 28 48 8b 57 20 48 85 d2 74 1f 48 3b 7a 28 75 76 48 8b 4f 28 48 3b 79 20 75 6c 48 83 78 20 00 74 17 <48> 89 4a 28 48 89 51 20 48 83 c4 08 c3 66 2e 0f 1f 84 00 00 00 00
RSP: 002b:00007fffe7da68c0 EFLAGS: 00010206
RAX: 00007fe06f52e1d0 RBX: 0000557f8f49d540 RCX: 0000557f8f49d540
RDX: 0000557f8f49d540 RSI: 00007fe06f52e1d0 RDI: 0000557f8f49d540
RBP: 00007fe06f52dac0 R08: 0000000000002760 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000202 R12: 00000000000049c0
R13: 0000557f8f4a1f00 R14: 0000000000000160 R15: 00007fe06f52dac0
 </TASK>


---
If you want syzbot to run the reproducer, reply with:
#syz test: git://repo/address.git branch-or-commit-hash
If you attach or paste a git patch, syzbot will apply it before testing.