[moderation] [kernel?] BUG: unable to handle kernel paging request in preempt_schedule_irq (2)
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syzbot
Aug 9, 2025, 7:04:34 AM8/9/25
to syzkaller-upst...@googlegroups.com
Hello,
syzbot found the following issue on:
HEAD commit: 7e161a991ea7 Merge tag 'i2c-for-6.17-rc1-part2' of git://g..
git tree: upstream
console output: https://syzkaller.appspot.com/x/log.txt?x=12a32042580000
kernel config: https://syzkaller.appspot.com/x/.config?x=943d6f7b1ddd8799
dashboard link: https://syzkaller.appspot.com/bug?extid=d027288aa43818ead92d
compiler: Debian clang version 20.1.7 (++20250616065708+6146a88f6049-1~exp1~20250616065826.132), Debian LLD 20.1.7
CC: [linux-...@vger.kernel.org lu...@kernel.org pet...@infradead.org tg...@linutronix.de]
Unfortunately, I don't have any reproducer for this issue yet.
Downloadable assets:
disk image: https://storage.googleapis.com/syzbot-assets/63fcd4da7120/disk-7e161a99.raw.xz
vmlinux: https://storage.googleapis.com/syzbot-assets/7e74f50fce60/vmlinux-7e161a99.xz
kernel image: https://storage.googleapis.com/syzbot-assets/3fd0451f9d02/bzImage-7e161a99.xz
IMPORTANT: if you fix the issue, please add the following tag to the commit:
Reported-by: syzbot+d02728...@syzkaller.appspotmail.com
loop7: detected capacity change from 0 to 4096
BUG: unable to handle page fault for address: ffffed1104a2176f
#PF: supervisor read access in kernel mode
#PF: error_code(0x0000) - not-present page
PGD 23ffee067 P4D 23ffee067 PUD 0
Oops: Oops: 0000 [#1] SMP KASAN PTI
CPU: 0 UID: 0 PID: 8386 Comm: syz.7.373 Tainted: G W 6.16.0-syzkaller-11699-g7e161a991ea7 #0 PREEMPT_{RT,(full)}
Tainted: [W]=WARN
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 07/12/2025
RIP: 0010:constant_test_bit arch/x86/include/asm/bitops.h:206 [inline]
RIP: 0010:arch_test_bit arch/x86/include/asm/bitops.h:238 [inline]
RIP: 0010:tif_test_bit include/linux/thread_info.h:192 [inline]
RIP: 0010:tif_need_resched include/linux/thread_info.h:208 [inline]
RIP: 0010:need_resched include/linux/sched.h:2206 [inline]
RIP: 0010:preempt_schedule_irq+0xee/0x150 kernel/sched/core.c:7291
Code: 44 24 40 fa a9 00 02 00 00 74 05 e8 ec a8 cf f6 bf 01 00 00 00 e8 f2 62 99 f6 65 48 8b 1c 25 08 30 f5 91 48 89 d8 48 c1 e8 03 <42> 80 3c 30 00 74 9d 48 89 df e8 f3 2b 27 f7 eb 93 48 c7 04 24 0e
RSP: 0018:ffffc9000621f640 EFLAGS: 00010802
RAX: 1ffff11004a21770 RBX: ffff88802510bb80 RCX: 0000000000000000
RDX: 0000000000000000 RSI: ffffffff8b61f7e0 RDI: 00000000ffffffff
RBP: ffffc9000621f6e0 R08: ffffffff8f1cf737 R09: 1ffffffff1e39ee6
R10: dffffc0000000000 R11: fffffbfff1e39ee7 R12: 0000000000000000
R13: 0000000000000000 R14: dffffc00ffffffff R15: 1ffff92000c43ec8
FS: 00007f6e3ce666c0(0000) GS:ffff8881268cd000(0000) knlGS:0000000000000000
CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: ffffed1104a2176f CR3: 0000000053478000 CR4: 00000000003526f0
Call Trace:
<TASK>
irqentry_exit+0x6f/0x90 kernel/entry/common.c:197
asm_sysvec_apic_timer_interrupt+0x1a/0x20 arch/x86/include/asm/idtentry.h:702
RIP: 0010:folio_add_lru+0xe/0x220 mm/swap.c:500
Code: 66 66 66 2e 0f 1f 84 00 00 00 00 00 90 90 90 90 90 90 90 90 90 90 90 90 90 90 90 90 f3 0f 1e fa 55 41 57 41 56 41 55 41 54 53 <48> 89 fb 49 bf 00 00 00 00 00 fc ff df e8 00 45 c5 ff 4c 8d 73 08
RSP: 0018:ffffc9000621f7a8 EFLAGS: 00000283
RAX: ffffffff81f51047 RBX: ffffea0001854340 RCX: 0000000000080000
RDX: ffffc9000deb3000 RSI: 0000000000005861 RDI: ffffea0001854340
RBP: 0000000000000000 R08: 0000000000000000 R09: 0000000000000000
R10: dffffc0000000000 R11: fffff9400030a869 R12: 0000000000000000
R13: 1ffffd400030a869 R14: 0000000000000000 R15: dffffc0000000000
filemap_add_folio+0x1af/0x270 mm/filemap.c:985
do_read_cache_folio+0x1de/0x560 mm/filemap.c:3924
do_read_cache_page mm/filemap.c:4023 [inline]
read_cache_page+0x5d/0x170 mm/filemap.c:4032
read_mapping_page include/linux/pagemap.h:985 [inline]
inode_read_data+0xa7/0x480 fs/ntfs3/inode.c:1054
ntfs_fill_super+0x39c8/0x40b0 fs/ntfs3/super.c:1533
get_tree_bdev_flags+0x40e/0x4d0 fs/super.c:1692
vfs_get_tree+0x92/0x2b0 fs/super.c:1815
do_new_mount+0x2a2/0x9e0 fs/namespace.c:3805
do_mount fs/namespace.c:4133 [inline]
__do_sys_mount fs/namespace.c:4344 [inline]
__se_sys_mount+0x317/0x410 fs/namespace.c:4321
do_syscall_x64 arch/x86/entry/syscall_64.c:63 [inline]
do_syscall_64+0xfa/0x3b0 arch/x86/entry/syscall_64.c:94
entry_SYSCALL_64_after_hwframe+0x77/0x7f
RIP: 0033:0x7f6e3f00030a
Code: d8 64 89 02 48 c7 c0 ff ff ff ff eb a6 e8 de 1a 00 00 66 2e 0f 1f 84 00 00 00 00 00 0f 1f 40 00 49 89 ca b8 a5 00 00 00 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:00007f6e3ce65e68 EFLAGS: 00000246 ORIG_RAX: 00000000000000a5
RAX: ffffffffffffffda RBX: 00007f6e3ce65ef0 RCX: 00007f6e3f00030a
RDX: 0000200000000080 RSI: 000020000001f740 RDI: 00007f6e3ce65eb0
RBP: 0000200000000080 R08: 00007f6e3ce65ef0 R09: 0000000000810002
R10: 0000000000810002 R11: 0000000000000246 R12: 000020000001f740
R13: 00007f6e3ce65eb0 R14: 000000000001f73a R15: 0000200000000480
</TASK>
Modules linked in:
CR2: ffffed1104a2176f
---[ end trace 0000000000000000 ]---
RIP: 0010:constant_test_bit arch/x86/include/asm/bitops.h:206 [inline]
RIP: 0010:arch_test_bit arch/x86/include/asm/bitops.h:238 [inline]
RIP: 0010:tif_test_bit include/linux/thread_info.h:192 [inline]
RIP: 0010:tif_need_resched include/linux/thread_info.h:208 [inline]
RIP: 0010:need_resched include/linux/sched.h:2206 [inline]
RIP: 0010:preempt_schedule_irq+0xee/0x150 kernel/sched/core.c:7291
Code: 44 24 40 fa a9 00 02 00 00 74 05 e8 ec a8 cf f6 bf 01 00 00 00 e8 f2 62 99 f6 65 48 8b 1c 25 08 30 f5 91 48 89 d8 48 c1 e8 03 <42> 80 3c 30 00 74 9d 48 89 df e8 f3 2b 27 f7 eb 93 48 c7 04 24 0e
RSP: 0018:ffffc9000621f640 EFLAGS: 00010802
RAX: 1ffff11004a21770 RBX: ffff88802510bb80 RCX: 0000000000000000
RDX: 0000000000000000 RSI: ffffffff8b61f7e0 RDI: 00000000ffffffff
RBP: ffffc9000621f6e0 R08: ffffffff8f1cf737 R09: 1ffffffff1e39ee6
R10: dffffc0000000000 R11: fffffbfff1e39ee7 R12: 0000000000000000
R13: 0000000000000000 R14: dffffc00ffffffff R15: 1ffff92000c43ec8
FS: 00007f6e3ce666c0(0000) GS:ffff8881268cd000(0000) knlGS:0000000000000000
CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: ffffed1104a2176f CR3: 0000000053478000 CR4: 00000000003526f0
----------------
Code disassembly (best guess):
0: 44 24 40 rex.R and $0x40,%al
3: fa cli
4: a9 00 02 00 00 test $0x200,%eax
9: 74 05 je 0x10
b: e8 ec a8 cf f6 call 0xf6cfa8fc
10: bf 01 00 00 00 mov $0x1,%edi
15: e8 f2 62 99 f6 call 0xf699630c
1a: 65 48 8b 1c 25 08 30 mov %gs:0xffffffff91f53008,%rbx
21: f5 91
23: 48 89 d8 mov %rbx,%rax
26: 48 c1 e8 03 shr $0x3,%rax
* 2a: 42 80 3c 30 00 cmpb $0x0,(%rax,%r14,1) <-- trapping instruction
2f: 74 9d je 0xffffffce
31: 48 89 df mov %rbx,%rdi
34: e8 f3 2b 27 f7 call 0xf7272c2c
39: eb 93 jmp 0xffffffce
3b: 48 rex.W
3c: c7 .byte 0xc7
3d: 04 24 add $0x24,%al
3f: 0e (bad)
---
This report is generated by a bot. It may contain errors.
See https://goo.gl/tpsmEJ for more information about syzbot.
syzbot engineers can be reached at syzk...@googlegroups.com.
syzbot will keep track of this issue. See:
https://goo.gl/tpsmEJ#status for how to communicate with syzbot.
If the report is already addressed, let syzbot know by replying with:
#syz fix: exact-commit-title
If you want to overwrite report's subsystems, reply with:
#syz set subsystems: new-subsystem
(See the list of subsystem names on the web dashboard)
If the report is a duplicate of another one, reply with:
#syz dup: exact-subject-of-another-report
If you want to undo deduplication, reply with:
#syz undup
syzbot found the following issue on:
HEAD commit: 7e161a991ea7 Merge tag 'i2c-for-6.17-rc1-part2' of git://g..
git tree: upstream
console output: https://syzkaller.appspot.com/x/log.txt?x=12a32042580000
kernel config: https://syzkaller.appspot.com/x/.config?x=943d6f7b1ddd8799
dashboard link: https://syzkaller.appspot.com/bug?extid=d027288aa43818ead92d
compiler: Debian clang version 20.1.7 (++20250616065708+6146a88f6049-1~exp1~20250616065826.132), Debian LLD 20.1.7
CC: [linux-...@vger.kernel.org lu...@kernel.org pet...@infradead.org tg...@linutronix.de]
Unfortunately, I don't have any reproducer for this issue yet.
Downloadable assets:
disk image: https://storage.googleapis.com/syzbot-assets/63fcd4da7120/disk-7e161a99.raw.xz
vmlinux: https://storage.googleapis.com/syzbot-assets/7e74f50fce60/vmlinux-7e161a99.xz
kernel image: https://storage.googleapis.com/syzbot-assets/3fd0451f9d02/bzImage-7e161a99.xz
IMPORTANT: if you fix the issue, please add the following tag to the commit:
Reported-by: syzbot+d02728...@syzkaller.appspotmail.com
loop7: detected capacity change from 0 to 4096
BUG: unable to handle page fault for address: ffffed1104a2176f
#PF: supervisor read access in kernel mode
#PF: error_code(0x0000) - not-present page
PGD 23ffee067 P4D 23ffee067 PUD 0
Oops: Oops: 0000 [#1] SMP KASAN PTI
CPU: 0 UID: 0 PID: 8386 Comm: syz.7.373 Tainted: G W 6.16.0-syzkaller-11699-g7e161a991ea7 #0 PREEMPT_{RT,(full)}
Tainted: [W]=WARN
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 07/12/2025
RIP: 0010:constant_test_bit arch/x86/include/asm/bitops.h:206 [inline]
RIP: 0010:arch_test_bit arch/x86/include/asm/bitops.h:238 [inline]
RIP: 0010:tif_test_bit include/linux/thread_info.h:192 [inline]
RIP: 0010:tif_need_resched include/linux/thread_info.h:208 [inline]
RIP: 0010:need_resched include/linux/sched.h:2206 [inline]
RIP: 0010:preempt_schedule_irq+0xee/0x150 kernel/sched/core.c:7291
Code: 44 24 40 fa a9 00 02 00 00 74 05 e8 ec a8 cf f6 bf 01 00 00 00 e8 f2 62 99 f6 65 48 8b 1c 25 08 30 f5 91 48 89 d8 48 c1 e8 03 <42> 80 3c 30 00 74 9d 48 89 df e8 f3 2b 27 f7 eb 93 48 c7 04 24 0e
RSP: 0018:ffffc9000621f640 EFLAGS: 00010802
RAX: 1ffff11004a21770 RBX: ffff88802510bb80 RCX: 0000000000000000
RDX: 0000000000000000 RSI: ffffffff8b61f7e0 RDI: 00000000ffffffff
RBP: ffffc9000621f6e0 R08: ffffffff8f1cf737 R09: 1ffffffff1e39ee6
R10: dffffc0000000000 R11: fffffbfff1e39ee7 R12: 0000000000000000
R13: 0000000000000000 R14: dffffc00ffffffff R15: 1ffff92000c43ec8
FS: 00007f6e3ce666c0(0000) GS:ffff8881268cd000(0000) knlGS:0000000000000000
CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: ffffed1104a2176f CR3: 0000000053478000 CR4: 00000000003526f0
Call Trace:
<TASK>
irqentry_exit+0x6f/0x90 kernel/entry/common.c:197
asm_sysvec_apic_timer_interrupt+0x1a/0x20 arch/x86/include/asm/idtentry.h:702
RIP: 0010:folio_add_lru+0xe/0x220 mm/swap.c:500
Code: 66 66 66 2e 0f 1f 84 00 00 00 00 00 90 90 90 90 90 90 90 90 90 90 90 90 90 90 90 90 f3 0f 1e fa 55 41 57 41 56 41 55 41 54 53 <48> 89 fb 49 bf 00 00 00 00 00 fc ff df e8 00 45 c5 ff 4c 8d 73 08
RSP: 0018:ffffc9000621f7a8 EFLAGS: 00000283
RAX: ffffffff81f51047 RBX: ffffea0001854340 RCX: 0000000000080000
RDX: ffffc9000deb3000 RSI: 0000000000005861 RDI: ffffea0001854340
RBP: 0000000000000000 R08: 0000000000000000 R09: 0000000000000000
R10: dffffc0000000000 R11: fffff9400030a869 R12: 0000000000000000
R13: 1ffffd400030a869 R14: 0000000000000000 R15: dffffc0000000000
filemap_add_folio+0x1af/0x270 mm/filemap.c:985
do_read_cache_folio+0x1de/0x560 mm/filemap.c:3924
do_read_cache_page mm/filemap.c:4023 [inline]
read_cache_page+0x5d/0x170 mm/filemap.c:4032
read_mapping_page include/linux/pagemap.h:985 [inline]
inode_read_data+0xa7/0x480 fs/ntfs3/inode.c:1054
ntfs_fill_super+0x39c8/0x40b0 fs/ntfs3/super.c:1533
get_tree_bdev_flags+0x40e/0x4d0 fs/super.c:1692
vfs_get_tree+0x92/0x2b0 fs/super.c:1815
do_new_mount+0x2a2/0x9e0 fs/namespace.c:3805
do_mount fs/namespace.c:4133 [inline]
__do_sys_mount fs/namespace.c:4344 [inline]
__se_sys_mount+0x317/0x410 fs/namespace.c:4321
do_syscall_x64 arch/x86/entry/syscall_64.c:63 [inline]
do_syscall_64+0xfa/0x3b0 arch/x86/entry/syscall_64.c:94
entry_SYSCALL_64_after_hwframe+0x77/0x7f
RIP: 0033:0x7f6e3f00030a
Code: d8 64 89 02 48 c7 c0 ff ff ff ff eb a6 e8 de 1a 00 00 66 2e 0f 1f 84 00 00 00 00 00 0f 1f 40 00 49 89 ca b8 a5 00 00 00 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:00007f6e3ce65e68 EFLAGS: 00000246 ORIG_RAX: 00000000000000a5
RAX: ffffffffffffffda RBX: 00007f6e3ce65ef0 RCX: 00007f6e3f00030a
RDX: 0000200000000080 RSI: 000020000001f740 RDI: 00007f6e3ce65eb0
RBP: 0000200000000080 R08: 00007f6e3ce65ef0 R09: 0000000000810002
R10: 0000000000810002 R11: 0000000000000246 R12: 000020000001f740
R13: 00007f6e3ce65eb0 R14: 000000000001f73a R15: 0000200000000480
</TASK>
Modules linked in:
CR2: ffffed1104a2176f
---[ end trace 0000000000000000 ]---
RIP: 0010:constant_test_bit arch/x86/include/asm/bitops.h:206 [inline]
RIP: 0010:arch_test_bit arch/x86/include/asm/bitops.h:238 [inline]
RIP: 0010:tif_test_bit include/linux/thread_info.h:192 [inline]
RIP: 0010:tif_need_resched include/linux/thread_info.h:208 [inline]
RIP: 0010:need_resched include/linux/sched.h:2206 [inline]
RIP: 0010:preempt_schedule_irq+0xee/0x150 kernel/sched/core.c:7291
Code: 44 24 40 fa a9 00 02 00 00 74 05 e8 ec a8 cf f6 bf 01 00 00 00 e8 f2 62 99 f6 65 48 8b 1c 25 08 30 f5 91 48 89 d8 48 c1 e8 03 <42> 80 3c 30 00 74 9d 48 89 df e8 f3 2b 27 f7 eb 93 48 c7 04 24 0e
RSP: 0018:ffffc9000621f640 EFLAGS: 00010802
RAX: 1ffff11004a21770 RBX: ffff88802510bb80 RCX: 0000000000000000
RDX: 0000000000000000 RSI: ffffffff8b61f7e0 RDI: 00000000ffffffff
RBP: ffffc9000621f6e0 R08: ffffffff8f1cf737 R09: 1ffffffff1e39ee6
R10: dffffc0000000000 R11: fffffbfff1e39ee7 R12: 0000000000000000
R13: 0000000000000000 R14: dffffc00ffffffff R15: 1ffff92000c43ec8
FS: 00007f6e3ce666c0(0000) GS:ffff8881268cd000(0000) knlGS:0000000000000000
CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: ffffed1104a2176f CR3: 0000000053478000 CR4: 00000000003526f0
----------------
Code disassembly (best guess):
0: 44 24 40 rex.R and $0x40,%al
3: fa cli
4: a9 00 02 00 00 test $0x200,%eax
9: 74 05 je 0x10
b: e8 ec a8 cf f6 call 0xf6cfa8fc
10: bf 01 00 00 00 mov $0x1,%edi
15: e8 f2 62 99 f6 call 0xf699630c
1a: 65 48 8b 1c 25 08 30 mov %gs:0xffffffff91f53008,%rbx
21: f5 91
23: 48 89 d8 mov %rbx,%rax
26: 48 c1 e8 03 shr $0x3,%rax
* 2a: 42 80 3c 30 00 cmpb $0x0,(%rax,%r14,1) <-- trapping instruction
2f: 74 9d je 0xffffffce
31: 48 89 df mov %rbx,%rdi
34: e8 f3 2b 27 f7 call 0xf7272c2c
39: eb 93 jmp 0xffffffce
3b: 48 rex.W
3c: c7 .byte 0xc7
3d: 04 24 add $0x24,%al
3f: 0e (bad)
---
This report is generated by a bot. It may contain errors.
See https://goo.gl/tpsmEJ for more information about syzbot.
syzbot engineers can be reached at syzk...@googlegroups.com.
syzbot will keep track of this issue. See:
https://goo.gl/tpsmEJ#status for how to communicate with syzbot.
If the report is already addressed, let syzbot know by replying with:
#syz fix: exact-commit-title
If you want to overwrite report's subsystems, reply with:
#syz set subsystems: new-subsystem
(See the list of subsystem names on the web dashboard)
If the report is a duplicate of another one, reply with:
#syz dup: exact-subject-of-another-report
If you want to undo deduplication, reply with:
#syz undup
syzbot
Nov 3, 2025, 5:58:23 AM11/3/25
to syzkaller-upst...@googlegroups.com
Auto-closing this bug as obsolete.
Crashes did not happen for a while, no reproducer and no activity.
Crashes did not happen for a while, no reproducer and no activity.
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