INFO: task syz.5.1716:5706 blocked for more than 122 seconds.
Not tainted syzkaller #0
"echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
task:syz.5.1716 state:D stack:0 pid:5706 tgid:5705 ppid:2392 flags:0x00004004
Call Trace:
context_switch kernel/sched/core.c:5945 [inline]
__schedule+0x1322/0x1df0 kernel/sched/core.c:7791
__schedule_loop kernel/sched/core.c:7872 [inline]
schedule+0xc6/0x240 kernel/sched/core.c:7887
super_lock+0x150/0x300 fs/super.c:115
super_lock_shared fs/super.c:140 [inline]
iterate_supers+0x8a/0x560 fs/super.c:934
quota_sync_all fs/quota/quota.c:69 [inline]
__do_sys_quotactl fs/quota/quota.c:938 [inline]
__se_sys_quotactl+0x308/0x7d0 fs/quota/quota.c:917
__x64_sys_quotactl+0x9f/0xc0 fs/quota/quota.c:917
x64_sys_call+0x2818/0x2ee0 arch/x86/include/generated/asm/syscalls_64.h:180
do_syscall_x64 arch/x86/entry/common.c:52 [inline]
do_syscall_64+0x58/0xf0 arch/x86/entry/common.c:83
entry_SYSCALL_64_after_hwframe+0x76/0x7e
RIP: 0033:0x7f3f6b78ebe9
RSP: 002b:00007f3f6c67c038 EFLAGS: 00000246 ORIG_RAX: 00000000000000b3
RAX: ffffffffffffffda RBX: 00007f3f6b9b5fa0 RCX: 00007f3f6b78ebe9
RDX: 0000000000000000 RSI: 0000000000000000 RDI: ffffffff80000101
RBP: 00007f3f6b811e19 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000
R13: 00007f3f6b9b6038 R14: 00007f3f6b9b5fa0 R15: 00007fffca220cb8
INFO: task syz.5.1716:5707 blocked for more than 123 seconds.
Not tainted syzkaller #0
"echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
task:syz.5.1716 state:D stack:0 pid:5707 tgid:5705 ppid:2392 flags:0x00004004
Call Trace:
context_switch kernel/sched/core.c:5945 [inline]
__schedule+0x1322/0x1df0 kernel/sched/core.c:7791
__schedule_loop kernel/sched/core.c:7872 [inline]
schedule+0xc6/0x240 kernel/sched/core.c:7887
super_lock+0x150/0x300 fs/super.c:115
super_lock_shared fs/super.c:140 [inline]
iterate_supers+0x8a/0x560 fs/super.c:934
quota_sync_all fs/quota/quota.c:69 [inline]
__do_sys_quotactl fs/quota/quota.c:938 [inline]
__se_sys_quotactl+0x308/0x7d0 fs/quota/quota.c:917
__x64_sys_quotactl+0x9f/0xc0 fs/quota/quota.c:917
x64_sys_call+0x2818/0x2ee0 arch/x86/include/generated/asm/syscalls_64.h:180
do_syscall_x64 arch/x86/entry/common.c:52 [inline]
do_syscall_64+0x58/0xf0 arch/x86/entry/common.c:83
entry_SYSCALL_64_after_hwframe+0x76/0x7e
RIP: 0033:0x7f3f6b78ebe9
RSP: 002b:00007f3f6c65b038 EFLAGS: 00000246 ORIG_RAX: 00000000000000b3
RAX: ffffffffffffffda RBX: 00007f3f6b9b6090 RCX: 00007f3f6b78ebe9
RDX: 0000000000000000 RSI: 0000000000000000 RDI: ffffffff80000100
RBP: 00007f3f6b811e19 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000
R13: 00007f3f6b9b6128 R14: 00007f3f6b9b6090 R15: 00007fffca220cb8
NMI backtrace for cpu 0
CPU: 0 UID: 0 PID: 37 Comm: khungtaskd Not tainted syzkaller #0 a29bcd2d578c4b9493db917853c72486663e8fa1
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 07/12/2025
Call Trace:
__dump_stack+0x21/0x30 lib/dump_stack.c:94
dump_stack_lvl+0x10c/0x190 lib/dump_stack.c:120
dump_stack+0x19/0x20 lib/dump_stack.c:129
nmi_cpu_backtrace+0x2bf/0x2d0 lib/nmi_backtrace.c:113
nmi_trigger_cpumask_backtrace+0x142/0x2c0 lib/nmi_backtrace.c:62
arch_trigger_cpumask_backtrace+0x14/0x20 arch/x86/kernel/apic/hw_nmi.c:41
trigger_all_cpu_backtrace include/linux/nmi.h:158 [inline]
check_hung_uninterruptible_tasks kernel/hung_task.c:267 [inline]
watchdog+0xd8f/0xed0 kernel/hung_task.c:423
kthread+0x2c7/0x370 kernel/kthread.c:389
ret_from_fork+0x67/0xa0 arch/x86/kernel/process.c:153
ret_from_fork_asm+0x1a/0x30 arch/x86/entry/entry_64.S:244
Sending NMI from CPU 0 to CPUs 1:
NMI backtrace for cpu 1
CPU: 1 UID: 0 PID: 11328 Comm: syz.8.3569 Not tainted syzkaller #0 a29bcd2d578c4b9493db917853c72486663e8fa1
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 07/12/2025
RIP: 0010:this_cpu_pvti arch/x86/include/asm/kvmclock.h:11 [inline]
RIP: 0010:kvm_sched_clock_read+0x8/0x30 arch/x86/kernel/kvmclock.c:91
Code: ee 33 c4 fb 5c 65 c6 05 2f 25 79 7a 00 eb b7 cc cc cc b8 7b 70 89 a0 90 90 90 90 90 90 90 90 90 90 90 f3 0f 1e fa 55 48 89 e5 <65> 48 8b 3d 30 c0 76 7a e8 5b 00 00 00 48 2b 05 34 8a 6a 01 5d c3
RSP: 0018:ffffc9000267ecf8 EFLAGS: 00000283
RAX: ffffffff81e241cb RBX: 0000000000140cca RCX: ffff88815d3b8000
RDX: 0000000000000000 RSI: 0000000000000000 RDI: ffffea000507e080
RBP: ffffc9000267ecf8 R08: ffffea000507e0b7 R09: 0000000000000000
R10: ffffed10283f0400 R11: fffff94000a0fc17 R12: 0000000000000000
R13: dffffc0000000000 R14: ffffea000507e080 R15: 0000000000000000
FS: 00007f8756e466c0(0000) GS:ffff8881f6f00000(0000) knlGS:0000000000000000
CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007f8756e03f98 CR3: 0000000165b3e000 CR4: 00000000003526b0
Call Trace:
paravirt_sched_clock arch/x86/include/asm/paravirt.h:35 [inline]
sched_clock_noinstr+0xd/0x30 arch/x86/kernel/tsc.c:267
local_clock_noinstr+0x10/0xc0 kernel/sched/clock.c:301
local_clock+0x14/0x30 kernel/sched/clock.c:315
__set_page_owner+0x80/0x5d0 mm/page_owner.c:335
set_page_owner include/linux/page_owner.h:35 [inline]
post_alloc_hook+0x3b9/0x3f0 mm/page_alloc.c:1826
prep_new_page+0x1c/0x120 mm/page_alloc.c:1834
get_page_from_freelist+0x48ce/0x4960 mm/page_alloc.c:3914
__alloc_pages_noprof+0x31f/0x7b0 mm/page_alloc.c:5258
__folio_alloc_noprof+0x14/0x80 mm/page_alloc.c:5291
__folio_alloc_node_noprof include/linux/gfp.h:280 [inline]
folio_alloc_noprof include/linux/gfp.h:322 [inline]
folio_alloc_mpol_noprof include/linux/gfp.h:327 [inline]
shmem_alloc_folio mm/shmem.c:1786 [inline]
shmem_alloc_and_add_folio+0x452/0x1050 mm/shmem.c:1828
shmem_get_folio_gfp+0x5f0/0x1380 mm/shmem.c:2358
shmem_fault+0x17d/0x350 mm/shmem.c:2561
__do_fault mm/memory.c:4926 [inline]
do_read_fault mm/memory.c:5355 [inline]
do_fault mm/memory.c:5489 [inline]
do_pte_missing+0x298c/0x4240 mm/memory.c:3995
handle_pte_fault mm/memory.c:5834 [inline]
__handle_mm_fault mm/memory.c:5977 [inline]
handle_mm_fault+0x1166/0x1b90 mm/memory.c:6145
faultin_page mm/gup.c:1207 [inline]
__get_user_pages+0x1169/0x22d0 mm/gup.c:1508
populate_vma_page_range mm/gup.c:1946 [inline]
__mm_populate+0x2f9/0x440 mm/gup.c:2049
mm_populate include/linux/mm.h:3495 [inline]
vm_mmap_pgoff+0x454/0x4e0 mm/util.c:599
ksys_mmap_pgoff+0xfb/0x1e0 mm/mmap.c:557
__do_sys_mmap arch/x86/kernel/sys_x86_64.c:86 [inline]
__se_sys_mmap arch/x86/kernel/sys_x86_64.c:79 [inline]
__x64_sys_mmap+0x121/0x140 arch/x86/kernel/sys_x86_64.c:79
x64_sys_call+0x13bf/0x2ee0 arch/x86/include/generated/asm/syscalls_64.h:10
do_syscall_x64 arch/x86/entry/common.c:52 [inline]
do_syscall_64+0x58/0xf0 arch/x86/entry/common.c:83
entry_SYSCALL_64_after_hwframe+0x76/0x7e
RIP: 0033:0x7f8755f8ebe9
Code: ff ff c3 66 2e 0f 1f 84 00 00 00 00 00 0f 1f 40 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 c7 c1 a8 ff ff ff f7 d8 64 89 01 48
RSP: 002b:00007f8756e46038 EFLAGS: 00000246 ORIG_RAX: 0000000000000009
RAX: ffffffffffffffda RBX: 00007f87561b5fa0 RCX: 00007f8755f8ebe9
RDX: b635773f06ebbeee RSI: 0000000000b36000 RDI: 0000200000000000
RBP: 00007f8756011e19 R08: ffffffffffffffff R09: 0000000000000000
R10: 0000000000008031 R11: 0000000000000246 R12: 0000000000000000
R13: 00007f87561b6038 R14: 00007f87561b5fa0 R15: 00007ffe81b7fd78