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Message-ID: <bug-220506-13602@https.bugzilla.kernel.org/>
Date: Thu, 28 Aug 2025 07:42:58 +0000
From: bugzilla-daemon@...nel.org
To: linux-ext4@...r.kernel.org
Subject: [Bug 220506] New: INFO: task sync:4678 blocked for more than 248
seconds.
https://bugzilla.kernel.org/show_bug.cgi?id=220506
Bug ID: 220506
Summary: INFO: task sync:4678 blocked for more than 248
seconds.
Product: File System
Version: 2.5
Hardware: All
OS: Linux
Status: NEW
Severity: normal
Priority: P3
Component: ext2
Assignee: fs_ext2@...nel-bugs.osdl.org
Reporter: ionut_n2001@...oo.com
Regression: No
Hello Kernel Team,
I notice this today:
[ 207.341680] usb 2-1: new SuperSpeed USB device number 2 using xhci_hcd
[ 207.354355] usb 2-1: New USB device found, idVendor=0951, idProduct=1666,
bcdDevice= 1.10
[ 207.354363] usb 2-1: New USB device strings: Mfr=1, Product=2,
SerialNumber=3
[ 207.354368] usb 2-1: Product: DataTraveler 3.0
[ 207.354372] usb 2-1: Manufacturer: Kingston
[ 207.354376] usb 2-1: SerialNumber: E0D55E629079E410B886110E
[ 207.383661] usb-storage 2-1:1.0: USB Mass Storage device detected
[ 207.383881] scsi host0: usb-storage 2-1:1.0
[ 207.384019] usbcore: registered new interface driver usb-storage
[ 207.386872] usbcore: registered new interface driver uas
[ 208.393343] scsi 0:0:0:0: Direct-Access Kingston DataTraveler 3.0 PMAP
PQ: 0 ANSI: 6
[ 208.393711] sd 0:0:0:0: Attached scsi generic sg0 type 0
[ 208.438871] sd 0:0:0:0: [sda] 60604416 512-byte logical blocks: (31.0
GB/28.9 GiB)
[ 208.439102] sd 0:0:0:0: [sda] Write Protect is off
[ 208.439109] sd 0:0:0:0: [sda] Mode Sense: 45 00 00 00
[ 208.439324] sd 0:0:0:0: [sda] Write cache: disabled, read cache: enabled,
doesn't support DPO or FUA
[ 208.486094] sda: sda1
[ 208.486217] sd 0:0:0:0: [sda] Attached SCSI removable disk
[ 208.511162] io scheduler bfq registered
[ 224.197641] EXT4-fs (sda1): mounting ext2 file system using the ext4
subsystem
[ 224.199581] EXT4-fs (sda1): warning: mounting unchecked fs, running e2fsck
is recommended
[ 224.214789] EXT4-fs (sda1): mounted filesystem
1353dba8-84bf-4bf1-b061-e67411835a8d r/w without journal. Quota mode: none.
[ 496.238203] INFO: task sync:4678 blocked for more than 124 seconds.
[ 496.238210] Not tainted 6.16.3-lowlatency-sunlight1 #1
[ 496.238214] "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this
message.
[ 496.238216] task:sync state:D stack:0 pid:4678 tgid:4678
ppid:4634 task_flags:0x400000 flags:0x00004002
[ 496.238224] Call Trace:
[ 496.238227] <TASK>
[ 496.238232] ? __x64_sys_tee+0x61/0xf0
[ 496.238241] __schedule+0x410/0x1230
[ 496.238249] ? srso_alias_return_thunk+0x5/0xfbef5
[ 496.238257] ? __pfx_sync_inodes_one_sb+0x10/0x10
[ 496.238262] schedule+0x27/0xf0
[ 496.238266] wb_wait_for_completion+0x85/0xc0
[ 496.238272] ? __pfx_autoremove_wake_function+0x10/0x10
[ 496.238279] sync_inodes_sb+0xcc/0x2b0
[ 496.238286] ? srso_alias_return_thunk+0x5/0xfbef5
[ 496.238293] ? __pfx_sync_inodes_one_sb+0x10/0x10
[ 496.238297] sync_inodes_one_sb+0x1b/0x30
[ 496.238302] __iterate_supers+0xe7/0x140
[ 496.238310] iterate_supers+0x10/0x20
[ 496.238315] ksys_sync+0x41/0xb0
[ 496.238320] __do_sys_sync+0xe/0x20
[ 496.238325] x64_sys_call+0x1bbb/0x2320
[ 496.238330] do_syscall_64+0x82/0x560
[ 496.238336] ? srso_alias_return_thunk+0x5/0xfbef5
[ 496.238340] ? do_fault+0x363/0x5d0
[ 496.238344] ? ___pte_offset_map+0x1c/0x1b0
[ 496.238351] ? srso_alias_return_thunk+0x5/0xfbef5
[ 496.238355] ? __handle_mm_fault+0x851/0x1040
[ 496.238365] ? srso_alias_return_thunk+0x5/0xfbef5
[ 496.238369] ? count_memcg_events+0x19c/0x200
[ 496.238375] ? srso_alias_return_thunk+0x5/0xfbef5
[ 496.238378] ? handle_mm_fault+0x252/0x370
[ 496.238384] ? srso_alias_return_thunk+0x5/0xfbef5
[ 496.238387] ? __ct_user_enter+0x2c/0x100
[ 496.238393] ? srso_alias_return_thunk+0x5/0xfbef5
[ 496.238397] ? irqentry_exit_to_user_mode+0x167/0x270
[ 496.238403] ? srso_alias_return_thunk+0x5/0xfbef5
[ 496.238406] ? irqentry_exit+0x43/0x50
[ 496.238411] ? srso_alias_return_thunk+0x5/0xfbef5
[ 496.238415] ? exc_page_fault+0x90/0x1b0
[ 496.238420] entry_SYSCALL_64_after_hwframe+0x76/0x7e
[ 496.238424] RIP: 0033:0x70883651e77b
[ 496.238429] RSP: 002b:00007fffd7142f98 EFLAGS: 00000246 ORIG_RAX:
00000000000000a2
[ 496.238434] RAX: ffffffffffffffda RBX: 00007fffd7143178 RCX:
000070883651e77b
[ 496.238437] RDX: 00007088365f7201 RSI: 00005e83c5f60050 RDI:
00007088365bc573
[ 496.238439] RBP: 0000000000000001 R08: 0000000000000000 R09:
0000000000000000
[ 496.238442] R10: 0000000000000004 R11: 0000000000000246 R12:
00007fffd7144ae4
[ 496.238444] R13: 0000000000000000 R14: 0000000000000000 R15:
00005e83c5f5fb58
[ 496.238453] </TASK>
[ 620.356703] INFO: task sync:4678 blocked for more than 248 seconds.
[ 620.356709] Not tainted 6.16.3-lowlatency-sunlight1 #1
[ 620.356711] "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this
message.
[ 620.356713] task:sync state:D stack:0 pid:4678 tgid:4678
ppid:4634 task_flags:0x400000 flags:0x00004002
[ 620.356719] Call Trace:
[ 620.356721] <TASK>
[ 620.356725] ? __x64_sys_tee+0x61/0xf0
[ 620.356732] __schedule+0x410/0x1230
[ 620.356738] ? srso_alias_return_thunk+0x5/0xfbef5
[ 620.356744] ? __pfx_sync_inodes_one_sb+0x10/0x10
[ 620.356747] schedule+0x27/0xf0
[ 620.356750] wb_wait_for_completion+0x85/0xc0
[ 620.356754] ? __pfx_autoremove_wake_function+0x10/0x10
[ 620.356760] sync_inodes_sb+0xcc/0x2b0
[ 620.356764] ? srso_alias_return_thunk+0x5/0xfbef5
[ 620.356769] ? __pfx_sync_inodes_one_sb+0x10/0x10
[ 620.356772] sync_inodes_one_sb+0x1b/0x30
[ 620.356775] __iterate_supers+0xe7/0x140
[ 620.356781] iterate_supers+0x10/0x20
[ 620.356784] ksys_sync+0x41/0xb0
[ 620.356787] __do_sys_sync+0xe/0x20
[ 620.356791] x64_sys_call+0x1bbb/0x2320
[ 620.356795] do_syscall_64+0x82/0x560
[ 620.356799] ? srso_alias_return_thunk+0x5/0xfbef5
[ 620.356802] ? do_fault+0x363/0x5d0
[ 620.356806] ? ___pte_offset_map+0x1c/0x1b0
[ 620.356811] ? srso_alias_return_thunk+0x5/0xfbef5
[ 620.356814] ? __handle_mm_fault+0x851/0x1040
[ 620.356820] ? srso_alias_return_thunk+0x5/0xfbef5
[ 620.356823] ? count_memcg_events+0x19c/0x200
[ 620.356827] ? srso_alias_return_thunk+0x5/0xfbef5
[ 620.356829] ? handle_mm_fault+0x252/0x370
[ 620.356833] ? srso_alias_return_thunk+0x5/0xfbef5
[ 620.356835] ? __ct_user_enter+0x2c/0x100
[ 620.356839] ? srso_alias_return_thunk+0x5/0xfbef5
[ 620.356842] ? irqentry_exit_to_user_mode+0x167/0x270
[ 620.356846] ? srso_alias_return_thunk+0x5/0xfbef5
[ 620.356849] ? irqentry_exit+0x43/0x50
[ 620.356852] ? srso_alias_return_thunk+0x5/0xfbef5
[ 620.356854] ? exc_page_fault+0x90/0x1b0
[ 620.356858] entry_SYSCALL_64_after_hwframe+0x76/0x7e
[ 620.356861] RIP: 0033:0x70883651e77b
[ 620.356864] RSP: 002b:00007fffd7142f98 EFLAGS: 00000246 ORIG_RAX:
00000000000000a2
[ 620.356868] RAX: ffffffffffffffda RBX: 00007fffd7143178 RCX:
000070883651e77b
[ 620.356870] RDX: 00007088365f7201 RSI: 00005e83c5f60050 RDI:
00007088365bc573
[ 620.356871] RBP: 0000000000000001 R08: 0000000000000000 R09:
0000000000000000
[ 620.356873] R10: 0000000000000004 R11: 0000000000000246 R12:
00007fffd7144ae4
[ 620.356875] R13: 0000000000000000 R14: 0000000000000000 R15:
00005e83c5f5fb58
[ 620.356881] </TASK>
/dev/sda1 ext2 29G 8.5G 19G 32%
/run/media/user1/1353dba8-84bf-4bf1-b061-e67411835a8d
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