BUG: unable to handle page fault for address: fffffffffffffff1
#PF: supervisor read access in kernel mode
#PF: error_code(0x0000) - not-present page
PGD 72ac067 P4D 72ac067 PUD 72ae067 PMD 0
Oops: Oops: 0000 [#1] PREEMPT SMP KASAN PTI
CPU: 0 UID: 0 PID: 1903 Comm: syz.0.520 Not tainted syzkaller #0 487852573998b859d95f7a0f07f96e56ce6678e4
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 07/12/2025
RIP: 0010:read_pages+0x47e/0x670 mm/readahead.c:190
Code: 48 b8 00 00 00 00 00 fc ff df 41 80 7c 05 00 00 74 08 4c 89 e7 e8 a2 c9 1c 00 49 8b 3c 24 48 89 de 4d 89 f3 41 ba f6 ac 86 0c <45> 03 53 f1 74 02 0f 0b 41 ff d3 0f 1f 00 4c 89 e7 e8 2c 36 00 00
RSP: 0018:ffffc9000e79f140 EFLAGS: 00010246
RAX: dffffc0000000000 RBX: ffffea0004925800 RCX: 1ffffffff0c2c649
RDX: ffffc90001651000 RSI: ffffea0004925800 RDI: ffff88812d8e8000
RBP: ffffc9000e79f270 R08: ffffea0004925837 R09: 1ffffd4000924b06
R10: 000000000c86acf6 R11: 0000000000000000 R12: ffffc9000e79f5d0
R13: 1ffff92001cf3eba R14: 0000000000000000 R15: ffffffff86163248
FS: 00007fc35ba246c0(0000) GS:ffff8881f6e00000(0000) knlGS:0000000000000000
CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: fffffffffffffff1 CR3: 000000012edaa000 CR4: 00000000003526b0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000004 DR6: 00000000ffff0ff0 DR7: 0000000000000400
Call Trace:
<TASK>
page_cache_ra_order+0x8cd/0xdf0 mm/readahead.c:524
page_cache_sync_ra+0x713/0x920 mm/readahead.c:627
page_cache_sync_readahead include/linux/pagemap.h:1403 [inline]
collapse_file mm/khugepaged.c:1902 [inline]
hpage_collapse_scan_file+0xbab/0x3510 mm/khugepaged.c:2329
madvise_collapse+0x4c6/0xaf0 mm/khugepaged.c:2771
madvise_vma_behavior+0x69d/0x2d40 mm/madvise.c:1365
madvise_walk_vmas+0x1b1/0x2e0 mm/madvise.c:1545
do_madvise+0x4b7/0x960 mm/madvise.c:1738
__do_sys_madvise mm/madvise.c:1754 [inline]
__se_sys_madvise mm/madvise.c:1752 [inline]
__x64_sys_madvise+0xae/0xc0 mm/madvise.c:1752
x64_sys_call+0x20c3/0x2ee0 arch/x86/include/generated/asm/syscalls_64.h:29
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: 0033:0x7fc35ab8ebe9
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:00007fc35ba24038 EFLAGS: 00000246 ORIG_RAX: 000000000000001c
RAX: ffffffffffffffda RBX: 00007fc35adc5fa0 RCX: 00007fc35ab8ebe9
RDX: 0000000000000019 RSI: 0000000000400000 RDI: 0000200000000000
RBP: 00007fc35ac11e19 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000
R13: 00007fc35adc6038 R14: 00007fc35adc5fa0 R15: 00007ffe946f5ea8
</TASK>
Modules linked in:
CR2: fffffffffffffff1
---[ end trace 0000000000000000 ]---
RIP: 0010:read_pages+0x47e/0x670 mm/readahead.c:190
Code: 48 b8 00 00 00 00 00 fc ff df 41 80 7c 05 00 00 74 08 4c 89 e7 e8 a2 c9 1c 00 49 8b 3c 24 48 89 de 4d 89 f3 41 ba f6 ac 86 0c <45> 03 53 f1 74 02 0f 0b 41 ff d3 0f 1f 00 4c 89 e7 e8 2c 36 00 00
RSP: 0018:ffffc9000e79f140 EFLAGS: 00010246
RAX: dffffc0000000000 RBX: ffffea0004925800 RCX: 1ffffffff0c2c649
RDX: ffffc90001651000 RSI: ffffea0004925800 RDI: ffff88812d8e8000
RBP: ffffc9000e79f270 R08: ffffea0004925837 R09: 1ffffd4000924b06
R10: 000000000c86acf6 R11: 0000000000000000 R12: ffffc9000e79f5d0
R13: 1ffff92001cf3eba R14: 0000000000000000 R15: ffffffff86163248
FS: 00007fc35ba246c0(0000) GS:ffff8881f6e00000(0000) knlGS:0000000000000000
CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: fffffffffffffff1 CR3: 000000012edaa000 CR4: 00000000003526b0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000004 DR6: 00000000ffff0ff0 DR7: 0000000000000400
----------------
Code disassembly (best guess):
0: 48 b8 00 00 00 00 00 movabs $0xdffffc0000000000,%rax
7: fc ff df
a: 41 80 7c 05 00 00 cmpb $0x0,0x0(%r13,%rax,1)
10: 74 08 je 0x1a
12: 4c 89 e7 mov %r12,%rdi
15: e8 a2 c9 1c 00 call 0x1cc9bc
1a: 49 8b 3c 24 mov (%r12),%rdi
1e: 48 89 de mov %rbx,%rsi
21: 4d 89 f3 mov %r14,%r11
24: 41 ba f6 ac 86 0c mov $0xc86acf6,%r10d
* 2a: 45 03 53 f1 add -0xf(%r11),%r10d <-- trapping instruction
2e: 74 02 je 0x32
30: 0f 0b ud2
32: 41 ff d3 call *%r11
35: 0f 1f 00 nopl (%rax)
38: 4c 89 e7 mov %r12,%rdi
3b: e8 2c 36 00 00 call 0x366c