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BUG: unable to handle kernel NULL pointer dereference in read_pages

Status: upstream: reported C repro on 2024/04/08 09:09
Bug presence: origin:downstream
[Documentation on labels]
Reported-by: syzbot+b8b677753f84c7e1c454@syzkaller.appspotmail.com
First crash: 570d, last: 87d
Fix bisection: the issue occurs on the latest tested release (bisect log)
  
▶ ▼ Bug presence (3)
Date Name Commit Repro Result
2024/04/09 android14-6.1 (ToT) 338203a81721 C [report] BUG: unable to handle kernel NULL pointer dereference in read_pages
2024/04/09 lts (merge base) 883d1a956208 C Didn't crash
2024/04/09 upstream (ToT) 20cb38a7af88 C Didn't crash
▶ ▼ Similar bugs (2)
Kernel Title Rank 🛈 Repro Cause bisect Fix bisect Count Last Reported Patched Status
upstream BUG: unable to handle kernel NULL pointer dereference in read_pages fs mm 10 1 2256d 2256d 0/29 auto-closed as invalid on 2019/11/25 07:12
android-6-12 BUG: unable to handle kernel paging request in read_pages 8 C 5 60d 93d 0/1 premoderation: reported C repro on 2025/07/29 15:58
▶ ▼ Last patch testing requests (5)
Created Duration User Patch Repo Result
2025/09/27 10:20 48m retest repro android14-6.1 OK log
2025/07/19 07:53 9m retest repro android14-6.1 report log
2025/05/10 04:27 6m retest repro android14-6.1 report log
2024/12/20 14:25 6m retest repro android14-6.1 report log
2024/10/11 11:13 14m retest repro android14-6.1 report log
▶ ▼ Fix bisection attempts (3)
Created Duration User Patch Repo Result
2025/02/27 18:46 1h46m bisect fix android14-6.1 OK (0) job log
2024/08/01 09:23 45m bisect fix android14-6.1 OK (0) job log log
2024/06/19 10:01 1h13m bisect fix android14-6.1 OK (0) job log log

Sample crash report:
BUG: kernel NULL pointer dereference, address: 0000000000000000
#PF: supervisor instruction fetch in kernel mode
#PF: error_code(0x0010) - not-present page
PGD 128876067 P4D 128876067 PUD 0 
Oops: 0010 [#1] PREEMPT SMP KASAN
CPU: 0 PID: 4292 Comm: syz.2.1633 Not tainted 6.1.129-syzkaller-00051-gc1fd50266bd6 #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 02/12/2025
RIP: 0010:0x0
Code: Unable to access opcode bytes at 0xffffffffffffffd6.
RSP: 0018:ffffc90000d26ff8 EFLAGS: 00010246
RAX: 1ffff920001a4eb8 RBX: dffffc0000000000 RCX: 0000000000080000
RDX: ffffc90002a9f000 RSI: ffffea0004d79200 RDI: ffff88811198f980
RBP: ffffc90000d27150 R08: ffffffff81a49318 R09: fffff940009af247
R10: 0000000000000000 R11: dffffc0000000001 R12: ffffc90000d275c0
R13: ffffea0004d79200 R14: ffffc90000d275d8 R15: 0000000000000000
FS:  00007f8d4a19c6c0(0000) GS:ffff8881f6e00000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: ffffffffffffffd6 CR3: 0000000121cd9000 CR4: 00000000003506b0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Call Trace:
 <TASK>
 read_pages+0x89c/0xd40 mm/readahead.c:192
 page_cache_ra_order+0x822/0xc40 mm/readahead.c:564
 ondemand_readahead+0x925/0xef0 mm/readahead.c:704
 page_cache_sync_ra+0x3d6/0x450 mm/readahead.c:731
 page_cache_sync_readahead include/linux/pagemap.h:1257 [inline]
 collapse_file mm/khugepaged.c:1887 [inline]
 hpage_collapse_scan_file+0x196e/0x48c0 mm/khugepaged.c:2259
 madvise_collapse+0x639/0xcf0 mm/khugepaged.c:2714
 madvise_vma_behavior mm/madvise.c:1125 [inline]
 madvise_walk_vmas mm/madvise.c:1299 [inline]
 do_madvise+0x1604/0x40b0 mm/madvise.c:1478
 __do_sys_madvise mm/madvise.c:1491 [inline]
 __se_sys_madvise mm/madvise.c:1489 [inline]
 __x64_sys_madvise+0xa8/0xc0 mm/madvise.c:1489
 x64_sys_call+0xec/0x9a0 arch/x86/include/generated/asm/syscalls_64.h:29
 do_syscall_x64 arch/x86/entry/common.c:51 [inline]
 do_syscall_64+0x3b/0xb0 arch/x86/entry/common.c:81
 entry_SYSCALL_64_after_hwframe+0x68/0xd2
RIP: 0033:0x7f8d4938d169
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:00007f8d4a19c038 EFLAGS: 00000246 ORIG_RAX: 000000000000001c
RAX: ffffffffffffffda RBX: 00007f8d495a5fa0 RCX: 00007f8d4938d169
RDX: 0000000000000019 RSI: 0000000000600003 RDI: 0000200000000000
RBP: 00007f8d4940e2a0 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000
R13: 0000000000000000 R14: 00007f8d495a5fa0 R15: 00007ffe5ca32fb8
 </TASK>
Modules linked in:
CR2: 0000000000000000
---[ end trace 0000000000000000 ]---
RIP: 0010:0x0
Code: Unable to access opcode bytes at 0xffffffffffffffd6.
RSP: 0018:ffffc90000d26ff8 EFLAGS: 00010246
RAX: 1ffff920001a4eb8 RBX: dffffc0000000000 RCX: 0000000000080000
RDX: ffffc90002a9f000 RSI: ffffea0004d79200 RDI: ffff88811198f980
RBP: ffffc90000d27150 R08: ffffffff81a49318 R09: fffff940009af247
R10: 0000000000000000 R11: dffffc0000000001 R12: ffffc90000d275c0
R13: ffffea0004d79200 R14: ffffc90000d275d8 R15: 0000000000000000
FS:  00007f8d4a19c6c0(0000) GS:ffff8881f6e00000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: ffffffffffffffd6 CR3: 0000000121cd9000 CR4: 00000000003506b0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400

Crashes (64):
Time Kernel Commit Syzkaller Config Log Report Syz repro C repro VM info Assets (help?) Manager Title
2025/03/29 04:45 android14-6.1 c1fd50266bd6 cf25e2c2 .config console log report info [disk image] [vmlinux] [kernel image] ci2-android-6-1 BUG: unable to handle kernel NULL pointer dereference in read_pages
2025/01/26 23:49 android14-6.1 ef4fb40b87a9 9fbd772e .config console log report info [disk image] [vmlinux] [kernel image] ci2-android-6-1 BUG: unable to handle kernel NULL pointer dereference in read_pages
2024/12/26 03:08 android14-6.1 4c2d86d81fa6 444551c4 .config console log report info [disk image] [vmlinux] [kernel image] ci2-android-6-1 BUG: unable to handle kernel NULL pointer dereference in read_pages
2024/11/12 07:52 android14-6.1 96ad4e759ff4 75bb1b32 .config console log report info [disk image] [vmlinux] [kernel image] ci2-android-6-1 BUG: unable to handle kernel NULL pointer dereference in read_pages
2024/11/12 07:52 android14-6.1 96ad4e759ff4 75bb1b32 .config console log report info [disk image] [vmlinux] [kernel image] ci2-android-6-1 BUG: unable to handle kernel NULL pointer dereference in read_pages
2024/09/06 09:07 android14-6.1 c7596f093d79 464ac2ed .config console log report info [disk image] [vmlinux] [kernel image] ci2-android-6-1 BUG: unable to handle kernel NULL pointer dereference in read_pages
2024/09/06 09:07 android14-6.1 c7596f093d79 464ac2ed .config console log report info [disk image] [vmlinux] [kernel image] ci2-android-6-1 BUG: unable to handle kernel NULL pointer dereference in read_pages
2024/09/03 01:22 android14-6.1 a1895da8bd3b 8045124c .config console log report info [disk image] [vmlinux] [kernel image] ci2-android-6-1 BUG: unable to handle kernel NULL pointer dereference in read_pages
2024/09/03 00:54 android14-6.1 a1895da8bd3b 8045124c .config console log report info [disk image] [vmlinux] [kernel image] ci2-android-6-1 BUG: unable to handle kernel NULL pointer dereference in read_pages
2024/09/02 21:09 android14-6.1 a1895da8bd3b 8045124c .config console log report info [disk image] [vmlinux] [kernel image] ci2-android-6-1 BUG: unable to handle kernel NULL pointer dereference in read_pages
2024/09/02 21:09 android14-6.1 a1895da8bd3b 8045124c .config console log report info [disk image] [vmlinux] [kernel image] ci2-android-6-1 BUG: unable to handle kernel NULL pointer dereference in read_pages
2024/09/02 16:22 android14-6.1 a1895da8bd3b 1eda0d14 .config console log report info [disk image] [vmlinux] [kernel image] ci2-android-6-1 BUG: unable to handle kernel NULL pointer dereference in read_pages
2024/09/02 16:22 android14-6.1 a1895da8bd3b 1eda0d14 .config console log report info [disk image] [vmlinux] [kernel image] ci2-android-6-1 BUG: unable to handle kernel NULL pointer dereference in read_pages
2024/09/02 16:21 android14-6.1 a1895da8bd3b 1eda0d14 .config console log report info [disk image] [vmlinux] [kernel image] ci2-android-6-1 BUG: unable to handle kernel NULL pointer dereference in read_pages
2024/09/02 16:21 android14-6.1 a1895da8bd3b 1eda0d14 .config console log report info [disk image] [vmlinux] [kernel image] ci2-android-6-1 BUG: unable to handle kernel NULL pointer dereference in read_pages
2024/09/02 16:20 android14-6.1 a1895da8bd3b 1eda0d14 .config console log report info [disk image] [vmlinux] [kernel image] ci2-android-6-1 BUG: unable to handle kernel NULL pointer dereference in read_pages
2024/09/02 14:44 android14-6.1 b5e374dda921 1eda0d14 .config console log report info [disk image] [vmlinux] [kernel image] ci2-android-6-1 BUG: unable to handle kernel NULL pointer dereference in read_pages
2024/09/02 10:03 android14-6.1 b5e374dda921 1eda0d14 .config console log report info [disk image] [vmlinux] [kernel image] ci2-android-6-1 BUG: unable to handle kernel NULL pointer dereference in read_pages
2024/09/02 04:37 android14-6.1 b5e374dda921 1eda0d14 .config console log report info [disk image] [vmlinux] [kernel image] ci2-android-6-1 BUG: unable to handle kernel NULL pointer dereference in read_pages
2024/09/02 01:06 android14-6.1 b5e374dda921 1eda0d14 .config console log report info [disk image] [vmlinux] [kernel image] ci2-android-6-1 BUG: unable to handle kernel NULL pointer dereference in read_pages
2024/09/01 23:37 android14-6.1 b5e374dda921 1eda0d14 .config console log report info [disk image] [vmlinux] [kernel image] ci2-android-6-1 BUG: unable to handle kernel NULL pointer dereference in read_pages
2024/09/01 09:48 android14-6.1 b5e374dda921 1eda0d14 .config console log report info [disk image] [vmlinux] [kernel image] ci2-android-6-1 BUG: unable to handle kernel NULL pointer dereference in read_pages
2024/09/01 06:08 android14-6.1 b5e374dda921 1eda0d14 .config console log report info [disk image] [vmlinux] [kernel image] ci2-android-6-1 BUG: unable to handle kernel NULL pointer dereference in read_pages
2024/09/01 00:50 android14-6.1 b5e374dda921 1eda0d14 .config console log report info [disk image] [vmlinux] [kernel image] ci2-android-6-1 BUG: unable to handle kernel NULL pointer dereference in read_pages
2024/08/31 23:14 android14-6.1 b5e374dda921 1eda0d14 .config console log report info [disk image] [vmlinux] [kernel image] ci2-android-6-1 BUG: unable to handle kernel NULL pointer dereference in read_pages
2024/08/31 14:47 android14-6.1 b5e374dda921 1eda0d14 .config console log report info [disk image] [vmlinux] [kernel image] ci2-android-6-1 BUG: unable to handle kernel NULL pointer dereference in read_pages
2024/08/31 14:47 android14-6.1 b5e374dda921 1eda0d14 .config console log report info [disk image] [vmlinux] [kernel image] ci2-android-6-1 BUG: unable to handle kernel NULL pointer dereference in read_pages
2024/08/20 15:03 android14-6.1 edca080b95df 9f0ab3fb .config console log report info [disk image] [vmlinux] [kernel image] ci2-android-6-1 BUG: unable to handle kernel NULL pointer dereference in read_pages
2024/08/20 15:03 android14-6.1 edca080b95df 9f0ab3fb .config console log report info [disk image] [vmlinux] [kernel image] ci2-android-6-1 BUG: unable to handle kernel NULL pointer dereference in read_pages
2024/05/15 17:26 android14-6.1 274e3e96961d 94b087b1 .config console log report info [disk image] [vmlinux] [kernel image] ci2-android-6-1 BUG: unable to handle kernel NULL pointer dereference in read_pages
2024/05/11 10:41 android14-6.1 4d55129aea65 9026e142 .config console log report info [disk image] [vmlinux] [kernel image] ci2-android-6-1 BUG: unable to handle kernel NULL pointer dereference in read_pages
2024/05/11 09:41 android14-6.1 4d55129aea65 9026e142 .config console log report info [disk image] [vmlinux] [kernel image] ci2-android-6-1 BUG: unable to handle kernel NULL pointer dereference in read_pages
2024/04/26 05:25 android14-6.1 fa87a072a7fc 8bdc0f22 .config console log report info [disk image] [vmlinux] [kernel image] ci2-android-6-1 BUG: unable to handle kernel NULL pointer dereference in read_pages
2024/04/19 01:04 android14-6.1 dcb09569bbff af24b050 .config console log report info [disk image] [vmlinux] [kernel image] ci2-android-6-1 BUG: unable to handle kernel NULL pointer dereference in read_pages
2024/04/18 22:20 android14-6.1 dcb09569bbff af24b050 .config console log report info [disk image] [vmlinux] [kernel image] ci2-android-6-1 BUG: unable to handle kernel NULL pointer dereference in read_pages
2024/04/18 22:08 android14-6.1 dcb09569bbff af24b050 .config console log report info [disk image] [vmlinux] [kernel image] ci2-android-6-1 BUG: unable to handle kernel NULL pointer dereference in read_pages
2024/04/14 11:25 android14-6.1 b76ed1185975 c8349e48 .config console log report info [disk image] [vmlinux] [kernel image] ci2-android-6-1 BUG: unable to handle kernel NULL pointer dereference in read_pages
2024/04/14 11:24 android14-6.1 b76ed1185975 c8349e48 .config console log report info [disk image] [vmlinux] [kernel image] ci2-android-6-1 BUG: unable to handle kernel NULL pointer dereference in read_pages
2024/04/14 06:33 android14-6.1 cfa154389a65 c8349e48 .config console log report info [disk image] [vmlinux] [kernel image] ci2-android-6-1 BUG: unable to handle kernel NULL pointer dereference in read_pages
2024/04/14 03:37 android14-6.1 cfa154389a65 c8349e48 .config console log report info [disk image] [vmlinux] [kernel image] ci2-android-6-1 BUG: unable to handle kernel NULL pointer dereference in read_pages
2024/04/14 01:26 android14-6.1 cfa154389a65 c8349e48 .config console log report info [disk image] [vmlinux] [kernel image] ci2-android-6-1 BUG: unable to handle kernel NULL pointer dereference in read_pages
2024/04/13 20:37 android14-6.1 cfa154389a65 c8349e48 .config console log report info [disk image] [vmlinux] [kernel image] ci2-android-6-1 BUG: unable to handle kernel NULL pointer dereference in read_pages
2024/04/08 09:03 android14-6.1 60534eef4739 ca620dd8 .config strace log report syz C [disk image] [vmlinux] [kernel image] [mounted in repro] ci2-android-6-1 BUG: unable to handle kernel NULL pointer dereference in read_pages
2024/04/08 08:23 android14-6.1 60534eef4739 ca620dd8 .config console log report info [disk image] [vmlinux] [kernel image] ci2-android-6-1 BUG: unable to handle kernel NULL pointer dereference in read_pages
2025/08/04 15:11 android14-6.1 3b4ff5af8d36 7368264b .config console log report info [disk image] [vmlinux] [kernel image] ci2-android-6-1 BUG: unable to handle kernel paging request in read_pages
2025/08/04 04:16 android14-6.1 3b4ff5af8d36 7368264b .config console log report info [disk image] [vmlinux] [kernel image] ci2-android-6-1 BUG: unable to handle kernel paging request in read_pages
2025/08/03 20:39 android14-6.1 3b4ff5af8d36 7368264b .config console log report info [disk image] [vmlinux] [kernel image] ci2-android-6-1 BUG: unable to handle kernel paging request in read_pages
2025/08/03 17:54 android14-6.1 3b4ff5af8d36 7368264b .config console log report info [disk image] [vmlinux] [kernel image] ci2-android-6-1 BUG: unable to handle kernel paging request in read_pages
2025/08/03 16:18 android14-6.1 3b4ff5af8d36 7368264b .config console log report info [disk image] [vmlinux] [kernel image] ci2-android-6-1 BUG: unable to handle kernel paging request in read_pages
2025/08/03 04:10 android14-6.1 3b4ff5af8d36 7368264b .config console log report info [disk image] [vmlinux] [kernel image] ci2-android-6-1 BUG: unable to handle kernel paging request in read_pages
2025/08/03 00:54 android14-6.1 3b4ff5af8d36 7368264b .config console log report info [disk image] [vmlinux] [kernel image] ci2-android-6-1 BUG: unable to handle kernel paging request in read_pages
2025/06/07 23:43 android14-6.1 7af56ffc913d 4826c28e .config console log report info [disk image] [vmlinux] [kernel image] ci2-android-6-1 BUG: unable to handle kernel paging request in read_pages
2025/05/23 00:24 android14-6.1 3c6d0251e1fb fa44301a .config console log report info [disk image] [vmlinux] [kernel image] ci2-android-6-1 BUG: unable to handle kernel paging request in read_pages
2025/05/22 08:45 android14-6.1 3c6d0251e1fb 0919b50b .config console log report info [disk image] [vmlinux] [kernel image] ci2-android-6-1 BUG: unable to handle kernel paging request in read_pages
* Struck through repros no longer work on HEAD.