syzbot |
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| ID | Workflow | Result | Correct | Bug | Created | Started | Finished | Revision | Error |
|---|---|---|---|---|---|---|---|---|---|
| 30bb5d86-8581-4014-9150-91de127b452e | assessment-security | DenialOfService: ✅ Exploitable: ❌ FilesystemTrigger: ❌ NetworkTrigger: ❌ PeripheralTrigger: ❌ RemoteTrigger: ❌ Unprivileged: ❌ UserNamespace: ❌ VMGuestTrigger: ❌ VMHostTrigger: ❌ | ❓ | INFO: task hung in page_cache_ra_order | 2026/05/15 21:53 | 2026/05/15 21:53 | 2026/05/15 22:50 | efdaf0f9b8bfc56ea6d17bea15a64f4591cc712d |
| Title | Replies (including bot) | Last reply |
|---|---|---|
| [syzbot] [fs?] [mm?] INFO: task hung in page_cache_ra_order | 1 (2) | 2025/04/23 05:40 |
| Created | Duration | User | Patch | Repo | Result |
|---|---|---|---|---|---|
| 2026/02/20 18:28 | 1h29m | retest repro | upstream | report log | |
| 2026/01/31 14:13 | 20m | retest repro | upstream | report log | |
| 2026/01/31 14:13 | 28m | retest repro | upstream | report log | |
| 2026/01/31 14:13 | 29m | retest repro | upstream | report log | |
| 2026/01/31 13:38 | 22m | retest repro | linux-next | report log | |
| 2025/11/07 19:00 | 40m | retest repro | linux-next | report log | |
| 2025/06/04 15:01 | 21m | retest repro | upstream | report log | |
| 2025/06/04 15:01 | 21m | retest repro | upstream | report log | |
| 2025/06/03 19:54 | 22m | retest repro | upstream | report log |
INFO: task syz.2.19:6136 blocked for more than 143 seconds.
Not tainted syzkaller #0
"echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
task:syz.2.19 state:D stack:25928 pid:6136 tgid:6136 ppid:6001 task_flags:0x440040 flags:0x00004004
Call Trace:
<TASK>
context_switch kernel/sched/core.c:5357 [inline]
__schedule+0x1798/0x4cc0 kernel/sched/core.c:6961
__schedule_loop kernel/sched/core.c:7043 [inline]
schedule+0x165/0x360 kernel/sched/core.c:7058
schedule_preempt_disabled+0x13/0x30 kernel/sched/core.c:7115
rwsem_down_read_slowpath+0x5fd/0x8f0 kernel/locking/rwsem.c:1086
__down_read_common kernel/locking/rwsem.c:1261 [inline]
__down_read kernel/locking/rwsem.c:1274 [inline]
down_read+0x98/0x2e0 kernel/locking/rwsem.c:1539
filemap_invalidate_lock_shared include/linux/fs.h:934 [inline]
page_cache_ra_order+0x318/0xd40 mm/readahead.c:488
do_sync_mmap_readahead+0x25e/0x7a0 mm/filemap.c:-1
filemap_fault+0x62c/0x1200 mm/filemap.c:3445
__do_fault+0x138/0x390 mm/memory.c:5152
do_shared_fault mm/memory.c:5637 [inline]
do_fault mm/memory.c:5711 [inline]
do_pte_missing mm/memory.c:4234 [inline]
handle_pte_fault mm/memory.c:6052 [inline]
__handle_mm_fault+0x1847/0x5440 mm/memory.c:6195
handle_mm_fault+0x40a/0x8e0 mm/memory.c:6364
do_user_addr_fault+0xa81/0x1390 arch/x86/mm/fault.c:1336
handle_page_fault arch/x86/mm/fault.c:1476 [inline]
exc_page_fault+0x76/0xf0 arch/x86/mm/fault.c:1532
asm_exc_page_fault+0x26/0x30 arch/x86/include/asm/idtentry.h:623
RIP: 0033:0x7fc397b56958
RSP: 002b:00007ffe3e313068 EFLAGS: 00010202
RAX: 0000200000000080 RBX: 0000000000000004 RCX: 0030626c6c756e2f
RDX: 000000000000000c RSI: 6c756e2f7665642f RDI: 0000200000000080
RBP: 0000000000000000 R08: 0000001b31320000 R09: 0000000000000001
R10: 0000000000000001 R11: 0000000000000009 R12: 00007fc397db5fac
R13: 00007fc397db5fa0 R14: fffffffffffffffe R15: 0000000000000006
</TASK>
INFO: task syz.3.20:6137 blocked for more than 143 seconds.
Not tainted syzkaller #0
"echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
task:syz.3.20 state:D stack:25928 pid:6137 tgid:6137 ppid:6014 task_flags:0x440040 flags:0x00004004
Call Trace:
<TASK>
context_switch kernel/sched/core.c:5357 [inline]
__schedule+0x1798/0x4cc0 kernel/sched/core.c:6961
__schedule_loop kernel/sched/core.c:7043 [inline]
schedule+0x165/0x360 kernel/sched/core.c:7058
schedule_preempt_disabled+0x13/0x30 kernel/sched/core.c:7115
rwsem_down_read_slowpath+0x5fd/0x8f0 kernel/locking/rwsem.c:1086
__down_read_common kernel/locking/rwsem.c:1261 [inline]
__down_read kernel/locking/rwsem.c:1274 [inline]
down_read+0x98/0x2e0 kernel/locking/rwsem.c:1539
filemap_invalidate_lock_shared include/linux/fs.h:934 [inline]
page_cache_ra_order+0x318/0xd40 mm/readahead.c:488
do_sync_mmap_readahead+0x25e/0x7a0 mm/filemap.c:-1
filemap_fault+0x62c/0x1200 mm/filemap.c:3445
__do_fault+0x138/0x390 mm/memory.c:5152
do_shared_fault mm/memory.c:5637 [inline]
do_fault mm/memory.c:5711 [inline]
do_pte_missing mm/memory.c:4234 [inline]
handle_pte_fault mm/memory.c:6052 [inline]
__handle_mm_fault+0x1847/0x5440 mm/memory.c:6195
handle_mm_fault+0x40a/0x8e0 mm/memory.c:6364
do_user_addr_fault+0xa81/0x1390 arch/x86/mm/fault.c:1336
handle_page_fault arch/x86/mm/fault.c:1476 [inline]
exc_page_fault+0x76/0xf0 arch/x86/mm/fault.c:1532
asm_exc_page_fault+0x26/0x30 arch/x86/include/asm/idtentry.h:623
RIP: 0033:0x7fd18e556958
RSP: 002b:00007ffd174fcfe8 EFLAGS: 00010202
RAX: 0000200000000080 RBX: 0000000000000004 RCX: 0030626c6c756e2f
RDX: 000000000000000c RSI: 6c756e2f7665642f RDI: 0000200000000080
RBP: 0000000000000000 R08: 0000001b33220000 R09: 0000000000000001
R10: 0000000000000001 R11: 0000000000000009 R12: 00007fd18e7b5fac
R13: 00007fd18e7b5fa0 R14: fffffffffffffffe R15: 0000000000000006
</TASK>
INFO: task syz.4.21:6138 blocked for more than 144 seconds.
Not tainted syzkaller #0
"echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
task:syz.4.21 state:D stack:25928 pid:6138 tgid:6138 ppid:6006 task_flags:0x440040 flags:0x00004004
Call Trace:
<TASK>
context_switch kernel/sched/core.c:5357 [inline]
__schedule+0x1798/0x4cc0 kernel/sched/core.c:6961
__schedule_loop kernel/sched/core.c:7043 [inline]
schedule+0x165/0x360 kernel/sched/core.c:7058
schedule_preempt_disabled+0x13/0x30 kernel/sched/core.c:7115
rwsem_down_read_slowpath+0x5fd/0x8f0 kernel/locking/rwsem.c:1086
__down_read_common kernel/locking/rwsem.c:1261 [inline]
__down_read kernel/locking/rwsem.c:1274 [inline]
down_read+0x98/0x2e0 kernel/locking/rwsem.c:1539
filemap_invalidate_lock_shared include/linux/fs.h:934 [inline]
page_cache_ra_order+0x318/0xd40 mm/readahead.c:488
do_sync_mmap_readahead+0x25e/0x7a0 mm/filemap.c:-1
filemap_fault+0x62c/0x1200 mm/filemap.c:3445
__do_fault+0x138/0x390 mm/memory.c:5152
do_shared_fault mm/memory.c:5637 [inline]
do_fault mm/memory.c:5711 [inline]
do_pte_missing mm/memory.c:4234 [inline]
handle_pte_fault mm/memory.c:6052 [inline]
__handle_mm_fault+0x1847/0x5440 mm/memory.c:6195
handle_mm_fault+0x40a/0x8e0 mm/memory.c:6364
do_user_addr_fault+0xa81/0x1390 arch/x86/mm/fault.c:1336
handle_page_fault arch/x86/mm/fault.c:1476 [inline]
exc_page_fault+0x76/0xf0 arch/x86/mm/fault.c:1532
asm_exc_page_fault+0x26/0x30 arch/x86/include/asm/idtentry.h:623
RIP: 0033:0x7fefa9356958
RSP: 002b:00007ffe8091de58 EFLAGS: 00010202
RAX: 0000200000000080 RBX: 0000000000000004 RCX: 0030626c6c756e2f
RDX: 000000000000000c RSI: 6c756e2f7665642f RDI: 0000200000000080
RBP: 0000000000000000 R08: 0000001b33520000 R09: 0000000000000001
R10: 0000000000000001 R11: 0000000000000009 R12: 00007fefa95b5fac
R13: 00007fefa95b5fa0 R14: fffffffffffffffe R15: 0000000000000006
</TASK>
INFO: task syz.1.18:6139 blocked for more than 145 seconds.
Not tainted syzkaller #0
"echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
task:syz.1.18 state:D stack:25928 pid:6139 tgid:6139 ppid:6011 task_flags:0x440040 flags:0x00004004
Call Trace:
<TASK>
context_switch kernel/sched/core.c:5357 [inline]
__schedule+0x1798/0x4cc0 kernel/sched/core.c:6961
__schedule_loop kernel/sched/core.c:7043 [inline]
schedule+0x165/0x360 kernel/sched/core.c:7058
schedule_preempt_disabled+0x13/0x30 kernel/sched/core.c:7115
rwsem_down_read_slowpath+0x5fd/0x8f0 kernel/locking/rwsem.c:1086
__down_read_common kernel/locking/rwsem.c:1261 [inline]
__down_read kernel/locking/rwsem.c:1274 [inline]
down_read+0x98/0x2e0 kernel/locking/rwsem.c:1539
filemap_invalidate_lock_shared include/linux/fs.h:934 [inline]
page_cache_ra_order+0x318/0xd40 mm/readahead.c:488
do_sync_mmap_readahead+0x25e/0x7a0 mm/filemap.c:-1
filemap_fault+0x62c/0x1200 mm/filemap.c:3445
__do_fault+0x138/0x390 mm/memory.c:5152
do_shared_fault mm/memory.c:5637 [inline]
do_fault mm/memory.c:5711 [inline]
do_pte_missing mm/memory.c:4234 [inline]
handle_pte_fault mm/memory.c:6052 [inline]
__handle_mm_fault+0x1847/0x5440 mm/memory.c:6195
handle_mm_fault+0x40a/0x8e0 mm/memory.c:6364
do_user_addr_fault+0xa81/0x1390 arch/x86/mm/fault.c:1336
handle_page_fault arch/x86/mm/fault.c:1476 [inline]
exc_page_fault+0x76/0xf0 arch/x86/mm/fault.c:1532
asm_exc_page_fault+0x26/0x30 arch/x86/include/asm/idtentry.h:623
RIP: 0033:0x7fe716556958
RSP: 002b:00007fff74dded18 EFLAGS: 00010202
RAX: 0000200000000080 RBX: 0000000000000004 RCX: 0030626c6c756e2f
RDX: 000000000000000c RSI: 6c756e2f7665642f RDI: 0000200000000080
RBP: 0000000000000000 R08: 0000001b33020000 R09: 0000000000000001
R10: 0000000000000001 R11: 0000000000000009 R12: 00007fe7167b5fac
R13: 00007fe7167b5fa0 R14: fffffffffffffffe R15: 0000000000000006
</TASK>
Showing all locks held in the system:
1 lock held by rcu_exp_gp_kthr/18:
1 lock held by khungtaskd/31:
#0: ffffffff8e139ee0 (rcu_read_lock){....}-{1:3}, at: rcu_lock_acquire include/linux/rcupdate.h:331 [inline]
#0: ffffffff8e139ee0 (rcu_read_lock){....}-{1:3}, at: rcu_read_lock include/linux/rcupdate.h:841 [inline]
#0: ffffffff8e139ee0 (rcu_read_lock){....}-{1:3}, at: debug_show_all_locks+0x2e/0x180 kernel/locking/lockdep.c:6775
2 locks held by kworker/u8:5/1042:
2 locks held by kworker/u8:7/4434:
2 locks held by getty/5622:
#0: ffff88802fea40a0 (&tty->ldisc_sem){++++}-{0:0}, at: tty_ldisc_ref_wait+0x25/0x70 drivers/tty/tty_ldisc.c:243
#1: ffffc9000332b2f0 (&ldata->atomic_read_lock){+.+.}-{4:4}, at: n_tty_read+0x43e/0x1400 drivers/tty/n_tty.c:2222
2 locks held by syz.0.17/6134:
#0: ffff888022d135a8 (&sb->s_type->i_mutex_key#8){++++}-{4:4}, at: inode_lock include/linux/fs.h:869 [inline]
#0: ffff888022d135a8 (&sb->s_type->i_mutex_key#8){++++}-{4:4}, at: blkdev_fallocate+0x260/0x530 block/fops.c:901
#1: ffff888022d13748 (mapping.invalidate_lock){++++}-{4:4}, at: filemap_invalidate_lock include/linux/fs.h:924 [inline]
#1: ffff888022d13748 (mapping.invalidate_lock){++++}-{4:4}, at: blkdev_fallocate+0x290/0x530 block/fops.c:902
1 lock held by syz.2.19/6136:
#0: ffff888022d13748 (mapping.invalidate_lock){++++}-{4:4}, at: filemap_invalidate_lock_shared include/linux/fs.h:934 [inline]
#0: ffff888022d13748 (mapping.invalidate_lock){++++}-{4:4}, at: page_cache_ra_order+0x318/0xd40 mm/readahead.c:488
1 lock held by syz.3.20/6137:
#0: ffff888022d13748 (mapping.invalidate_lock){++++}-{4:4}, at: filemap_invalidate_lock_shared include/linux/fs.h:934 [inline]
#0: ffff888022d13748 (mapping.invalidate_lock){++++}-{4:4}, at: page_cache_ra_order+0x318/0xd40 mm/readahead.c:488
1 lock held by syz.4.21/6138:
#0: ffff888022d13748 (mapping.invalidate_lock){++++}-{4:4}, at: filemap_invalidate_lock_shared include/linux/fs.h:934 [inline]
#0: ffff888022d13748 (mapping.invalidate_lock){++++}-{4:4}, at: page_cache_ra_order+0x318/0xd40 mm/readahead.c:488
1 lock held by syz.1.18/6139:
#0: ffff888022d13748 (mapping.invalidate_lock){++++}-{4:4}, at: filemap_invalidate_lock_shared include/linux/fs.h:934 [inline]
#0: ffff888022d13748 (mapping.invalidate_lock){++++}-{4:4}, at: page_cache_ra_order+0x318/0xd40 mm/readahead.c:488
1 lock held by syz.6.23/6282:
#0: ffff888022d13748 (mapping.invalidate_lock){++++}-{4:4}, at: filemap_invalidate_lock_shared include/linux/fs.h:934 [inline]
#0: ffff888022d13748 (mapping.invalidate_lock){++++}-{4:4}, at: page_cache_ra_order+0x318/0xd40 mm/readahead.c:488
1 lock held by syz.5.22/6284:
#0: ffff888022d13748 (mapping.invalidate_lock){++++}-{4:4}, at: filemap_invalidate_lock_shared include/linux/fs.h:934 [inline]
#0: ffff888022d13748 (mapping.invalidate_lock){++++}-{4:4}, at: page_cache_ra_order+0x318/0xd40 mm/readahead.c:488
1 lock held by syz.7.24/6285:
#0: ffff888022d13748 (mapping.invalidate_lock){++++}-{4:4}, at: filemap_invalidate_lock_shared include/linux/fs.h:934 [inline]
#0: ffff888022d13748 (mapping.invalidate_lock){++++}-{4:4}, at: page_cache_ra_order+0x318/0xd40 mm/readahead.c:488
1 lock held by syz.9.26/6286:
#0: ffff888022d13748 (mapping.invalidate_lock){++++}-{4:4}, at: filemap_invalidate_lock_shared include/linux/fs.h:934 [inline]
#0: ffff888022d13748 (mapping.invalidate_lock){++++}-{4:4}, at: page_cache_ra_order+0x318/0xd40 mm/readahead.c:488
1 lock held by syz.8.25/6287:
#0: ffff888022d13748 (mapping.invalidate_lock){++++}-{4:4}, at: filemap_invalidate_lock_shared include/linux/fs.h:934 [inline]
#0: ffff888022d13748 (mapping.invalidate_lock){++++}-{4:4}, at: page_cache_ra_order+0x318/0xd40 mm/readahead.c:488
1 lock held by syz.0.27/6375:
#0: ffff888022d13748 (mapping.invalidate_lock){++++}-{4:4}, at: filemap_invalidate_lock_shared include/linux/fs.h:934 [inline]
#0: ffff888022d13748 (mapping.invalidate_lock){++++}-{4:4}, at: page_cache_ra_order+0x318/0xd40 mm/readahead.c:488
1 lock held by syz.1.28/6380:
#0: ffff888022d13748 (mapping.invalidate_lock){++++}-{4:4}, at: filemap_invalidate_lock_shared include/linux/fs.h:934 [inline]
#0: ffff888022d13748 (mapping.invalidate_lock){++++}-{4:4}, at: page_cache_ra_order+0x318/0xd40 mm/readahead.c:488
1 lock held by syz.2.29/6395:
#0: ffff888022d13748 (mapping.invalidate_lock){++++}-{4:4}, at: filemap_invalidate_lock_shared include/linux/fs.h:934 [inline]
#0: ffff888022d13748 (mapping.invalidate_lock){++++}-{4:4}, at: page_cache_ra_order+0x318/0xd40 mm/readahead.c:488
1 lock held by syz.3.30/6396:
#0: ffff888022d13748 (mapping.invalidate_lock){++++}-{4:4}, at: filemap_invalidate_lock_shared include/linux/fs.h:934 [inline]
#0: ffff888022d13748 (mapping.invalidate_lock){++++}-{4:4}, at: page_cache_ra_order+0x318/0xd40 mm/readahead.c:488
1 lock held by syz.4.31/6397:
#0: ffff888022d13748 (mapping.invalidate_lock){++++}-{4:4}, at: filemap_invalidate_lock_shared include/linux/fs.h:934 [inline]
#0: ffff888022d13748 (mapping.invalidate_lock){++++}-{4:4}, at: page_cache_ra_order+0x318/0xd40 mm/readahead.c:488
1 lock held by syz.5.32/6499:
#0: ffff888022d13748 (mapping.invalidate_lock){++++}-{4:4}, at: filemap_invalidate_lock_shared include/linux/fs.h:934 [inline]
#0: ffff888022d13748 (mapping.invalidate_lock){++++}-{4:4}, at: page_cache_ra_order+0x318/0xd40 mm/readahead.c:488
1 lock held by syz.6.33/6516:
#0: ffff888022d13748 (mapping.invalidate_lock){++++}-{4:4}, at: filemap_invalidate_lock_shared include/linux/fs.h:934 [inline]
#0: ffff888022d13748 (mapping.invalidate_lock){++++}-{4:4}, at: page_cache_ra_order+0x318/0xd40 mm/readahead.c:488
1 lock held by syz.7.34/6529:
#0: ffff888022d13748 (mapping.invalidate_lock){++++}-{4:4}, at: filemap_invalidate_lock_shared include/linux/fs.h:934 [inline]
#0: ffff888022d13748 (mapping.invalidate_lock){++++}-{4:4}, at: page_cache_ra_order+0x318/0xd40 mm/readahead.c:488
1 lock held by syz.9.36/6535:
#0: ffff888022d13748 (mapping.invalidate_lock){++++}-{4:4}, at: filemap_invalidate_lock_shared include/linux/fs.h:934 [inline]
#0: ffff888022d13748 (mapping.invalidate_lock){++++}-{4:4}, at: page_cache_ra_order+0x318/0xd40 mm/readahead.c:488
1 lock held by syz.8.35/6536:
#0: ffff888022d13748 (mapping.invalidate_lock){++++}-{4:4}, at: filemap_invalidate_lock_shared include/linux/fs.h:934 [inline]
#0: ffff888022d13748 (mapping.invalidate_lock){++++}-{4:4}, at: page_cache_ra_order+0x318/0xd40 mm/readahead.c:488
1 lock held by syz.0.37/6618:
#0: ffff888022d13748 (mapping.invalidate_lock){++++}-{4:4}, at: filemap_invalidate_lock_shared include/linux/fs.h:934 [inline]
#0: ffff888022d13748 (mapping.invalidate_lock){++++}-{4:4}, at: page_cache_ra_order+0x318/0xd40 mm/readahead.c:488
1 lock held by syz.1.38/6639:
#0: ffff888022d13748 (mapping.invalidate_lock){++++}-{4:4}, at: filemap_invalidate_lock_shared include/linux/fs.h:934 [inline]
#0: ffff888022d13748 (mapping.invalidate_lock){++++}-{4:4}, at: page_cache_ra_order+0x318/0xd40 mm/readahead.c:488
1 lock held by syz.2.39/6643:
#0: ffff888022d13748 (mapping.invalidate_lock){++++}-{4:4}, at: filemap_invalidate_lock_shared include/linux/fs.h:934 [inline]
#0: ffff888022d13748 (mapping.invalidate_lock){++++}-{4:4}, at: page_cache_ra_order+0x318/0xd40 mm/readahead.c:488
1 lock held by syz.3.40/6646:
#0: ffff888022d13748 (mapping.invalidate_lock){++++}-{4:4}, at: filemap_invalidate_lock_shared include/linux/fs.h:934 [inline]
#0: ffff888022d13748 (mapping.invalidate_lock){++++}-{4:4}, at: page_cache_ra_order+0x318/0xd40 mm/readahead.c:488
1 lock held by syz.4.41/6647:
#0: ffff888022d13748 (mapping.invalidate_lock){++++}-{4:4}, at: filemap_invalidate_lock_shared include/linux/fs.h:934 [inline]
#0: ffff888022d13748 (mapping.invalidate_lock){++++}-{4:4}, at: page_cache_ra_order+0x318/0xd40 mm/readahead.c:488
1 lock held by syz.5.42/6740:
#0: ffff888022d13748 (mapping.invalidate_lock){++++}-{4:4}, at: filemap_invalidate_lock_shared include/linux/fs.h:934 [inline]
#0: ffff888022d13748 (mapping.invalidate_lock){++++}-{4:4}, at: page_cache_ra_order+0x318/0xd40 mm/readahead.c:488
1 lock held by syz.6.43/6772:
#0: ffff888022d13748 (mapping.invalidate_lock){++++}-{4:4}, at: filemap_invalidate_lock_shared include/linux/fs.h:934 [inline]
#0: ffff888022d13748 (mapping.invalidate_lock){++++}-{4:4}, at: page_cache_ra_order+0x318/0xd40 mm/readahead.c:488
1 lock held by syz.7.44/6785:
#0: ffff888022d13748 (mapping.invalidate_lock){++++}-{4:4}, at: filemap_invalidate_lock_shared include/linux/fs.h:934 [inline]
#0: ffff888022d13748 (mapping.invalidate_lock){++++}-{4:4}, at: page_cache_ra_order+0x318/0xd40 mm/readahead.c:488
1 lock held by syz.9.46/6786:
#0: ffff888022d13748 (mapping.invalidate_lock){++++}-{4:4}, at: filemap_invalidate_lock_shared include/linux/fs.h:934 [inline]
#0: ffff888022d13748 (mapping.invalidate_lock){++++}-{4:4}, at: page_cache_ra_order+0x318/0xd40 mm/readahead.c:488
1 lock held by syz.8.45/6787:
#0: ffff888022d13748 (mapping.invalidate_lock){++++}-{4:4}, at: filemap_invalidate_lock_shared include/linux/fs.h:934 [inline]
#0: ffff888022d13748 (mapping.invalidate_lock){++++}-{4:4}, at: page_cache_ra_order+0x318/0xd40 mm/readahead.c:488
3 locks held by syz-executor/6789:
#0: ffffffff8eca8880 (&ops->srcu#2){.+.+}-{0:0}, at: rcu_lock_acquire include/linux/rcupdate.h:331 [inline]
#0: ffffffff8eca8880 (&ops->srcu#2){.+.+}-{0:0}, at: rcu_read_lock include/linux/rcupdate.h:841 [inline]
#0: ffffffff8eca8880 (&ops->srcu#2){.+.+}-{0:0}, at: rtnl_link_ops_get+0x23/0x250 net/core/rtnetlink.c:570
#1: ffffffff8f538a08 (rtnl_mutex){+.+.}-{4:4}, at: rtnl_lock net/core/rtnetlink.c:80 [inline]
#1: ffffffff8f538a08 (rtnl_mutex){+.+.}-{4:4}, at: rtnl_nets_lock net/core/rtnetlink.c:341 [inline]
#1: ffffffff8f538a08 (rtnl_mutex){+.+.}-{4:4}, at: rtnl_newlink+0x8db/0x1c70 net/core/rtnetlink.c:4056
#2: ffffffff8e13f978 (rcu_state.exp_mutex){+.+.}-{4:4}, at: exp_funnel_lock kernel/rcu/tree_exp.h:311 [inline]
#2: ffffffff8e13f978 (rcu_state.exp_mutex){+.+.}-{4:4}, at: synchronize_rcu_expedited+0x2f6/0x730 kernel/rcu/tree_exp.h:957
=============================================
NMI backtrace for cpu 0
CPU: 0 UID: 0 PID: 31 Comm: khungtaskd Not tainted syzkaller #0 PREEMPT(full)
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 07/12/2025
Call Trace:
<TASK>
dump_stack_lvl+0x189/0x250 lib/dump_stack.c:120
nmi_cpu_backtrace+0x39e/0x3d0 lib/nmi_backtrace.c:113
nmi_trigger_cpumask_backtrace+0x17a/0x300 lib/nmi_backtrace.c:62
trigger_all_cpu_backtrace include/linux/nmi.h:160 [inline]
check_hung_uninterruptible_tasks kernel/hung_task.c:328 [inline]
watchdog+0xf93/0xfe0 kernel/hung_task.c:491
kthread+0x70e/0x8a0 kernel/kthread.c:463
ret_from_fork+0x3f9/0x770 arch/x86/kernel/process.c:148
ret_from_fork_asm+0x1a/0x30 arch/x86/entry/entry_64.S:245
</TASK>
Sending NMI from CPU 0 to CPUs 1:
NMI backtrace for cpu 1
CPU: 1 UID: 0 PID: 0 Comm: swapper/1 Not tainted syzkaller #0 PREEMPT(full)
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 07/12/2025
RIP: 0010:pv_native_safe_halt+0x13/0x20 arch/x86/kernel/paravirt.c:82
Code: 53 e7 02 00 cc cc cc 90 90 90 90 90 90 90 90 90 90 90 90 90 90 90 90 f3 0f 1e fa 66 90 0f 00 2d f3 86 0e 00 f3 0f 1e fa fb f4 <c3> cc cc cc cc cc cc cc cc cc cc cc cc 90 90 90 90 90 90 90 90 90
RSP: 0018:ffffc90000197de0 EFLAGS: 000002c2
RAX: a8e263504cbd8700 RBX: ffffffff819683c8 RCX: a8e263504cbd8700
RDX: 0000000000000001 RSI: ffffffff8d9b7d7a RDI: ffffffff8be33780
RBP: ffffc90000197f20 R08: ffff8880b8732f9b R09: 1ffff110170e65f3
R10: dffffc0000000000 R11: ffffed10170e65f4 R12: ffffffff8fa38c30
R13: 0000000000000001 R14: 0000000000000001 R15: 1ffff110039d7b40
FS: 0000000000000000(0000) GS:ffff888125d1b000(0000) knlGS:0000000000000000
CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007f7adcdefc18 CR3: 000000000df36000 CR4: 00000000003526f0
Call Trace:
<TASK>
arch_safe_halt arch/x86/include/asm/paravirt.h:107 [inline]
default_idle+0x13/0x20 arch/x86/kernel/process.c:757
default_idle_call+0x74/0xb0 kernel/sched/idle.c:122
cpuidle_idle_call kernel/sched/idle.c:190 [inline]
do_idle+0x1e8/0x510 kernel/sched/idle.c:330
cpu_startup_entry+0x44/0x60 kernel/sched/idle.c:428
start_secondary+0x101/0x110 arch/x86/kernel/smpboot.c:315
common_startup_64+0x13e/0x147
</TASK>
| Time | Kernel | Commit | Syzkaller | Config | Log | Report | Syz repro | C repro | VM info | Assets (help?) | Manager | Title |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| 2025/08/28 20:35 | upstream | 07d9df80082b | 443c11c7 | .config | console log | report | syz / log | C | [disk image] [vmlinux] [kernel image] | ci-upstream-kasan-gce | INFO: task hung in page_cache_ra_order | |
| 2025/04/19 22:27 | upstream | 8560697b23dc | 2a20f901 | .config | strace log | report | syz / log | C | [disk image] [vmlinux] [kernel image] | ci2-upstream-fs | INFO: task hung in page_cache_ra_order | |
| 2025/04/18 19:10 | upstream | fc96b232f8e7 | 2a20f901 | .config | strace log | report | syz / log | C | [disk image] [vmlinux] [kernel image] | ci-upstream-kasan-gce | INFO: task hung in page_cache_ra_order | |
| 2026/03/16 18:37 | upstream | f338e7738378 | 64e21424 | .config | console log | report | syz / log | [disk image] [vmlinux] [kernel image] | ci-upstream-kasan-gce-selinux-root | INFO: task hung in page_cache_ra_order | ||
| 2025/04/22 02:40 | upstream | 9d7a0577c9db | 2a20f901 | .config | console log | report | syz / log | [disk image] [vmlinux] [kernel image] | ci-upstream-kasan-gce | INFO: task hung in page_cache_ra_order | ||
| 2025/08/30 15:32 | linux-next | 7fa4d8dc380f | 807a3b61 | .config | console log | report | syz / log | [disk image] [vmlinux] [kernel image] | ci-upstream-rust-kasan-gce | INFO: task hung in page_cache_ra_order | ||
| 2026/06/07 18:32 | upstream | 979c294509f9 | cc095639 | .config | console log | report | info | [disk image] [vmlinux] [kernel image] | ci-upstream-kasan-gce-smack-root | INFO: task hung in page_cache_ra_order | ||
| 2026/06/05 08:55 | upstream | 9154c4af7829 | 197909be | .config | console log | report | info | [disk image] [vmlinux] [kernel image] | ci-upstream-kasan-gce | INFO: task hung in page_cache_ra_order | ||
| 2026/05/28 20:52 | upstream | eb3f4b7426cf | 681715f7 | .config | console log | report | info | [disk image] [vmlinux] [kernel image] | ci2-upstream-fs | INFO: task hung in page_cache_ra_order | ||
| 2026/05/20 06:30 | upstream | 27fa82620cba | 0909d65f | .config | console log | report | info | [disk image] [vmlinux] [kernel image] | ci-upstream-kasan-gce | INFO: task hung in page_cache_ra_order | ||
| 2026/05/14 22:59 | upstream | 66182ca873a4 | 6ccb967e | .config | console log | report | info | [disk image] [vmlinux] [kernel image] | ci2-upstream-fs | INFO: task hung in page_cache_ra_order | ||
| 2026/05/03 07:03 | upstream | 66edb901bf87 | a0d91488 | .config | console log | report | info | [disk image] [vmlinux] [kernel image] | ci2-upstream-fs | INFO: task hung in page_cache_ra_order | ||
| 2026/05/01 00:43 | upstream | e75a43c7cec4 | a7464baf | .config | console log | report | info | [disk image] [vmlinux] [kernel image] | ci2-upstream-fs | INFO: task hung in page_cache_ra_order | ||
| 2026/04/25 22:14 | upstream | 897d54018cc9 | 9c2d0995 | .config | console log | report | info | [disk image] [vmlinux] [kernel image] | ci2-upstream-fs | INFO: task hung in page_cache_ra_order | ||
| 2026/04/23 09:53 | upstream | 2a4c0c11c019 | b10da5ec | .config | console log | report | info | [disk image] [vmlinux] [kernel image] | ci2-upstream-fs | INFO: task hung in page_cache_ra_order | ||
| 2026/04/22 15:34 | upstream | 6596a02b2078 | 4595e353 | .config | console log | report | info | [disk image] [vmlinux] [kernel image] | ci2-upstream-fs | INFO: task hung in page_cache_ra_order | ||
| 2026/04/10 15:56 | upstream | 9a9c8ce300cd | 38c8e246 | .config | console log | report | info | [disk image] [vmlinux] [kernel image] | ci2-upstream-fs | INFO: task hung in page_cache_ra_order | ||
| 2026/04/08 00:29 | upstream | 3036cd0d3328 | 2c961e87 | .config | console log | report | info | [disk image] [vmlinux] [kernel image] | ci2-upstream-fs | INFO: task hung in page_cache_ra_order | ||
| 2026/04/05 10:31 | upstream | 3aae9383f42f | 4440e7c2 | .config | console log | report | info | [disk image] [vmlinux] [kernel image] | ci2-upstream-fs | INFO: task hung in page_cache_ra_order | ||
| 2026/04/03 16:27 | upstream | d8a9a4b11a13 | 4440e7c2 | .config | console log | report | info | [disk image] [vmlinux] [kernel image] | ci2-upstream-fs | INFO: task hung in page_cache_ra_order | ||
| 2026/04/03 03:56 | upstream | 5619b098e2fb | 4440e7c2 | .config | console log | report | info | [disk image] [vmlinux] [kernel image] | ci2-upstream-fs | INFO: task hung in page_cache_ra_order | ||
| 2026/04/02 21:44 | upstream | 5619b098e2fb | 8b15d4ae | .config | console log | report | info | [disk image] [vmlinux] [kernel image] | ci-upstream-kasan-gce | INFO: task hung in page_cache_ra_order | ||
| 2026/03/27 07:29 | upstream | 46b513250491 | 766b6434 | .config | console log | report | info | [disk image] [vmlinux] [kernel image] | ci2-upstream-fs | INFO: task hung in page_cache_ra_order | ||
| 2026/03/23 02:38 | upstream | 8d8bd2a5aa98 | 5b92003d | .config | console log | report | info | [disk image] [vmlinux] [kernel image] | ci2-upstream-fs | INFO: task hung in page_cache_ra_order | ||
| 2026/03/18 08:27 | upstream | f0caa1d49cc0 | c8810548 | .config | console log | report | info | [disk image] [vmlinux] [kernel image] | ci-upstream-kasan-gce | INFO: task hung in page_cache_ra_order | ||
| 2026/03/17 10:16 | upstream | 2d1373e4246d | c01bca74 | .config | console log | report | info | [disk image] [vmlinux] [kernel image] | ci2-upstream-fs | INFO: task hung in page_cache_ra_order | ||
| 2026/03/12 04:47 | upstream | b29fb8829bff | 2d88ab01 | .config | console log | report | info | [disk image] [vmlinux] [kernel image] | ci2-upstream-fs | INFO: task hung in page_cache_ra_order | ||
| 2026/02/22 21:43 | upstream | 32a92f8c8932 | 6e7b5511 | .config | console log | report | info | [disk image] [vmlinux] [kernel image] | ci2-upstream-fs | INFO: task hung in page_cache_ra_order | ||
| 2026/02/06 16:44 | upstream | b7ff7151e653 | 97745f52 | .config | console log | report | info | [disk image] [vmlinux] [kernel image] | ci-upstream-kasan-gce | INFO: task hung in page_cache_ra_order | ||
| 2026/02/01 15:30 | upstream | 162b42445b58 | 6b8752f2 | .config | console log | report | info | [disk image] [vmlinux] [kernel image] | ci-upstream-kasan-gce | INFO: task hung in page_cache_ra_order | ||
| 2026/01/13 02:49 | upstream | 0f61b1860cc3 | d6526ea3 | .config | console log | report | info | [disk image] [vmlinux] [kernel image] | ci-upstream-kasan-gce | INFO: task hung in page_cache_ra_order | ||
| 2026/01/10 16:22 | upstream | b6151c4e60e5 | d6526ea3 | .config | console log | report | info | [disk image] [vmlinux] [kernel image] | ci-upstream-kasan-gce | INFO: task hung in page_cache_ra_order | ||
| 2026/01/04 14:25 | upstream | aacb0a6d604a | d6526ea3 | .config | console log | report | info | [disk image] [vmlinux] [kernel image] | ci-upstream-kasan-gce | INFO: task hung in page_cache_ra_order | ||
| 2025/12/31 20:50 | upstream | c8ebd433459b | d6526ea3 | .config | console log | report | info | [disk image] [vmlinux] [kernel image] | ci-upstream-kasan-gce | INFO: task hung in page_cache_ra_order | ||
| 2025/12/29 03:17 | upstream | c875a6c32467 | d6526ea3 | .config | console log | report | info | [disk image] [vmlinux] [kernel image] | ci-upstream-kasan-gce | INFO: task hung in page_cache_ra_order | ||
| 2025/12/28 16:40 | upstream | d26143bb38e2 | d6526ea3 | .config | console log | report | info | [disk image] [vmlinux] [kernel image] | ci-upstream-kasan-gce | INFO: task hung in page_cache_ra_order | ||
| 2025/12/25 12:32 | upstream | ccd1cdca5cd4 | d6526ea3 | .config | console log | report | info | [disk image] [vmlinux] [kernel image] | ci-upstream-kasan-gce | INFO: task hung in page_cache_ra_order | ||
| 2025/12/17 18:24 | upstream | ea1013c15392 | d6526ea3 | .config | console log | report | info | [disk image] [vmlinux] [kernel image] | ci-upstream-kasan-gce | INFO: task hung in page_cache_ra_order | ||
| 2025/12/10 00:54 | upstream | cb015814f8b6 | d6526ea3 | .config | console log | report | info | [disk image] [vmlinux] [kernel image] | ci-upstream-kasan-gce | INFO: task hung in page_cache_ra_order | ||
| 2025/12/07 04:13 | upstream | 416f99c3b16f | d6526ea3 | .config | console log | report | info | [disk image] [vmlinux] [kernel image] | ci-upstream-kasan-gce | INFO: task hung in page_cache_ra_order | ||
| 2025/11/24 16:22 | upstream | ac3fd01e4c1e | bf6fe8fe | .config | console log | report | info | [disk image] [vmlinux] [kernel image] | ci-upstream-kasan-gce | INFO: task hung in page_cache_ra_order | ||
| 2025/10/13 00:47 | upstream | 8765f467912f | ff1712fe | .config | console log | report | info | [disk image] [vmlinux] [kernel image] | ci-upstream-kasan-gce | INFO: task hung in page_cache_ra_order | ||
| 2025/10/08 21:27 | upstream | 0d97f2067c16 | 7e2882b3 | .config | console log | report | info | [disk image] [vmlinux] [kernel image] | ci-upstream-kasan-gce | INFO: task hung in page_cache_ra_order | ||
| 2025/09/20 08:18 | upstream | cd89d487374c | 67c37560 | .config | console log | report | info | [disk image] [vmlinux] [kernel image] | ci-upstream-kasan-gce | INFO: task hung in page_cache_ra_order | ||
| 2025/08/21 14:33 | upstream | 41cd3fd15263 | 0b9605c8 | .config | console log | report | info | [disk image] [vmlinux] [kernel image] | ci-upstream-kasan-gce-root | INFO: task hung in page_cache_ra_order | ||
| 2025/08/20 23:41 | upstream | 038d61fd6422 | bd178e57 | .config | console log | report | info | [disk image] [vmlinux] [kernel image] | ci-upstream-kasan-gce-smack-root | INFO: task hung in page_cache_ra_order | ||
| 2025/04/02 00:04 | upstream | 08733088b566 | d863cf4b | .config | console log | report | info | [disk image] [vmlinux] [kernel image] | ci-upstream-kasan-gce-selinux-root | INFO: task hung in page_cache_ra_order | ||
| 2026/05/11 17:42 | upstream | 5d6919055dec | e6eb7c0b | .config | console log | report | info | [disk image] [vmlinux] [kernel image] | ci-upstream-kasan-gce-386 | INFO: task hung in page_cache_ra_order | ||
| 2026/01/17 13:25 | upstream | b62ce2547fe8 | d6526ea3 | .config | console log | report | info | [disk image] [vmlinux] [kernel image] | ci-upstream-kasan-gce-386 | INFO: task hung in page_cache_ra_order | ||
| 2026/01/01 06:53 | upstream | 9528d5c091c5 | d6526ea3 | .config | console log | report | info | [disk image] [vmlinux] [kernel image] | ci-upstream-kasan-gce-386 | INFO: task hung in page_cache_ra_order | ||
| 2025/11/29 06:16 | upstream | 6cf62f0174de | d6526ea3 | .config | console log | report | info | [disk image] [vmlinux] [kernel image] | ci-upstream-kasan-gce-386 | INFO: task hung in page_cache_ra_order | ||
| 2025/11/12 08:20 | upstream | 24172e0d7990 | 4e1406b4 | .config | console log | report | info | [disk image] [vmlinux] [kernel image] | ci-upstream-kasan-gce-386 | INFO: task hung in page_cache_ra_order | ||
| 2026/05/05 20:33 | linux-next | 4cd074ae20bb | 06e69a27 | .config | console log | report | info | [disk image] [vmlinux] [kernel image] | ci-upstream-rust-kasan-gce | INFO: task hung in page_cache_ra_order | ||
| 2025/12/27 21:13 | linux-next | cc3aa43b44bd | d6526ea3 | .config | console log | report | info | [disk image] [vmlinux] [kernel image] | ci-upstream-linux-next-kasan-gce-root | INFO: task hung in page_cache_ra_order | ||
| 2025/12/22 16:38 | linux-next | cc3aa43b44bd | d6526ea3 | .config | console log | report | info | [disk image] [vmlinux] [kernel image] | ci-upstream-rust-kasan-gce | INFO: task hung in page_cache_ra_order | ||
| 2025/12/21 18:52 | linux-next | cc3aa43b44bd | d6526ea3 | .config | console log | report | info | [disk image] [vmlinux] [kernel image] | ci-upstream-rust-kasan-gce | INFO: task hung in page_cache_ra_order | ||
| 2025/10/24 14:33 | linux-next | 72fb0170ef1f | c0460fcd | .config | console log | report | info | [disk image] [vmlinux] [kernel image] | ci-upstream-linux-next-kasan-gce-root | INFO: task hung in page_cache_ra_order | ||
| 2025/10/17 03:32 | linux-next | 2433b8476165 | 19568248 | .config | console log | report | info | [disk image] [vmlinux] [kernel image] | ci-upstream-rust-kasan-gce | INFO: task hung in page_cache_ra_order | ||
| 2025/10/15 23:44 | linux-next | 1fdbb3ff1233 | 19568248 | .config | console log | report | info | [disk image] [vmlinux] [kernel image] | ci-upstream-rust-kasan-gce | INFO: task hung in page_cache_ra_order | ||
| 2025/10/13 06:44 | linux-next | 2b763d465239 | ff1712fe | .config | console log | report | info | [disk image] [vmlinux] [kernel image] | ci-upstream-linux-next-kasan-gce-root | INFO: task hung in page_cache_ra_order | ||
| 2025/10/07 08:10 | linux-next | 4a7153147192 | 8ef35d49 | .config | console log | report | info | [disk image] [vmlinux] [kernel image] | ci-upstream-rust-kasan-gce | INFO: task hung in page_cache_ra_order | ||
| 2025/10/05 00:53 | linux-next | 47a8d4b89844 | 49379ee0 | .config | console log | report | info | [disk image] [vmlinux] [kernel image] | ci-upstream-rust-kasan-gce | INFO: task hung in page_cache_ra_order | ||
| 2025/09/23 15:13 | linux-next | 846bd2225ec3 | 0ac7291c | .config | console log | report | info | [disk image] [vmlinux] [kernel image] | ci-upstream-linux-next-kasan-gce-root | INFO: task hung in page_cache_ra_order | ||
| 2026/06/02 05:53 | git://git.kernel.org/pub/scm/linux/kernel/git/arm64/linux.git for-kernelci | 4b4362973b6f | 1095583b | .config | console log | report | info | [disk image] [vmlinux] [kernel image] | ci-upstream-gce-arm64 | INFO: task hung in page_cache_ra_order |