syzbot

 sign-in | mailing list | source | docs
🐞 Open [1651]
≡ Subsystems
🐞 Fixed [5990]
🐞 Invalid [14761]
⬇ Missing Backports [132]
≡ Crashes
Kernel Health Bugs/Month Bug Lifetimes Fuzzing
Total Repo Heatmap Subsystems Heatmap
💬 Send us feedback

BUG: unable to handle kernel NULL pointer dereference in filemap_read_folio (4)

Status: upstream: reported C repro on 2024/11/16 23:40
Subsystems: fs
[Documentation on labels]
Reported-by: syzbot+09b7d050e4806540153d@syzkaller.appspotmail.com
First crash: 72d, last: 28m
▶ ▼ Discussions (1)
Title Replies (including bot) Last reply
[syzbot] [fs?] BUG: unable to handle kernel NULL pointer dereference in filemap_read_folio (4) 1 (3) 2024/11/17 00:37
▶ ▼ Similar bugs (3)
Kernel Title Repro Cause bisect Fix bisect Count Last Reported Patched Status
upstream BUG: unable to handle kernel NULL pointer dereference in filemap_read_folio (3) erofs C 492 72d 128d 28/28 fixed on 2024/11/12 23:31
upstream BUG: unable to handle kernel NULL pointer dereference in filemap_read_folio fs mm 8 817d 826d 0/28 auto-obsoleted due to no activity on 2023/02/26 19:26
upstream BUG: unable to handle kernel NULL pointer dereference in filemap_read_folio (2) fs 6 591d 640d 0/28 auto-obsoleted due to no activity on 2023/09/20 22:50
▶ ▼ Last patch testing requests (1)
Created Duration User Patch Repo Result
2024/11/17 00:18 17m hdanton@sina.com patch upstream OK 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 800000007bdd5067 P4D 800000007bdd5067 PUD 32d5c067 PMD 0 
Oops: Oops: 0010 [#1] PREEMPT SMP KASAN PTI
CPU: 0 UID: 0 PID: 5823 Comm: syz-executor166 Not tainted 6.13.0-rc5-syzkaller-00006-g56e6a3499e14 #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 09/13/2024
RIP: 0010:0x0
Code: Unable to access opcode bytes at 0xffffffffffffffd6.
RSP: 0018:ffffc90003c1f9d0 EFLAGS: 00010293
RAX: 0000000000000000 RBX: 0000000000000000 RCX: ffffffff81cf232f
RDX: ffff88805f0dbc00 RSI: ffffea00004bad80 RDI: ffff888029a1a380
RBP: ffffea00004bad80 R08: 0000000000000007 R09: 0000000000000000
R10: 0000000000000000 R11: 00000000000a2001 R12: 1ffff92000783f3b
R13: ffff888029a1a380 R14: 0000000000000000 R15: dffffc0000000000
FS:  0000555573756380(0000) GS:ffff8880b8600000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: ffffffffffffffd6 CR3: 000000005f222000 CR4: 00000000003526f0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Call Trace:
 <TASK>
 filemap_read_folio+0xc6/0x2a0 mm/filemap.c:2366
 do_read_cache_folio+0x263/0x5c0 mm/filemap.c:3826
 freader_get_folio+0x337/0x8e0 lib/buildid.c:77
 freader_fetch+0xc2/0x5b0 lib/buildid.c:120
 __build_id_parse.isra.0+0xef/0x770 lib/buildid.c:305
 do_procmap_query+0xdb2/0xfe0 fs/proc/task_mmu.c:534
 procfs_procmap_ioctl+0x7d/0xb0 fs/proc/task_mmu.c:613
 vfs_ioctl fs/ioctl.c:51 [inline]
 __do_sys_ioctl fs/ioctl.c:906 [inline]
 __se_sys_ioctl fs/ioctl.c:892 [inline]
 __x64_sys_ioctl+0x190/0x200 fs/ioctl.c:892
 do_syscall_x64 arch/x86/entry/common.c:52 [inline]
 do_syscall_64+0xcd/0x250 arch/x86/entry/common.c:83
 entry_SYSCALL_64_after_hwframe+0x77/0x7f
RIP: 0033:0x7f393b4443a9
Code: 48 83 c4 28 c3 e8 37 17 00 00 0f 1f 80 00 00 00 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 b8 ff ff ff f7 d8 64 89 01 48
RSP: 002b:00007ffedf710518 EFLAGS: 00000246 ORIG_RAX: 0000000000000010
RAX: ffffffffffffffda RBX: 00007ffedf7106f8 RCX: 00007f393b4443a9
RDX: 0000000020000080 RSI: 00000000c0686611 RDI: 0000000000000003
RBP: 00007f393b4b7610 R08: 0000000000008000 R09: 0000000000008000
R10: 0000000000000401 R11: 0000000000000246 R12: 0000000000000001
R13: 00007ffedf7106e8 R14: 0000000000000001 R15: 0000000000000001
 </TASK>
Modules linked in:
CR2: 0000000000000000
---[ end trace 0000000000000000 ]---
RIP: 0010:0x0
Code: Unable to access opcode bytes at 0xffffffffffffffd6.
RSP: 0018:ffffc90003c1f9d0 EFLAGS: 00010293
RAX: 0000000000000000 RBX: 0000000000000000 RCX: ffffffff81cf232f
RDX: ffff88805f0dbc00 RSI: ffffea00004bad80 RDI: ffff888029a1a380
RBP: ffffea00004bad80 R08: 0000000000000007 R09: 0000000000000000
R10: 0000000000000000 R11: 00000000000a2001 R12: 1ffff92000783f3b
R13: ffff888029a1a380 R14: 0000000000000000 R15: dffffc0000000000
FS:  0000555573756380(0000) GS:ffff8880b8600000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: ffffffffffffffd6 CR3: 000000005f222000 CR4: 00000000003526f0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400

Crashes (1011):
Time Kernel Commit Syzkaller Config Log Report Syz repro C repro VM info Assets (help?) Manager Title
2025/01/02 11:29 upstream 56e6a3499e14 d3ccff63 .config console log report syz / log C [disk image] [vmlinux] [kernel image] ci-qemu-gce-upstream-auto BUG: unable to handle kernel NULL pointer dereference in filemap_read_folio
2024/12/26 20:28 upstream 9b2ffa6148b1 d3ccff63 .config console log report syz / log C [disk image] [vmlinux] [kernel image] ci-qemu-gce-upstream-auto BUG: unable to handle kernel NULL pointer dereference in filemap_read_folio
2024/12/26 06:49 upstream 9b2ffa6148b1 444551c4 .config console log report syz / log C [disk image] [vmlinux] [kernel image] ci-qemu-gce-upstream-auto BUG: unable to handle kernel NULL pointer dereference in filemap_read_folio
2024/12/24 12:38 upstream f07044dd0df0 444551c4 .config console log report syz / log C [disk image] [vmlinux] [kernel image] ci-qemu-gce-upstream-auto BUG: unable to handle kernel NULL pointer dereference in filemap_read_folio
2024/12/23 04:24 upstream bcde95ce32b6 b4fbdbd4 .config console log report syz / log C [disk image] [vmlinux] [kernel image] ci-qemu-gce-upstream-auto BUG: unable to handle kernel NULL pointer dereference in filemap_read_folio
2024/12/20 19:09 upstream 8faabc041a00 49cfeac8 .config console log report syz / log C [disk image] [vmlinux] [kernel image] ci-qemu-gce-upstream-auto BUG: unable to handle kernel NULL pointer dereference in filemap_read_folio
2024/12/20 18:12 upstream 8faabc041a00 49cfeac8 .config console log report syz / log C [disk image] [vmlinux] [kernel image] ci-qemu-gce-upstream-auto BUG: unable to handle kernel NULL pointer dereference in filemap_read_folio
2024/12/18 12:32 upstream aef25be35d23 a0626d3a .config console log report syz / log C [disk image] [vmlinux] [kernel image] ci-qemu-gce-upstream-auto BUG: unable to handle kernel NULL pointer dereference in filemap_read_folio
2024/12/18 12:09 upstream aef25be35d23 a0626d3a .config console log report syz / log C [disk image] [vmlinux] [kernel image] ci-qemu-gce-upstream-auto BUG: unable to handle kernel NULL pointer dereference in filemap_read_folio
2024/12/18 11:44 upstream aef25be35d23 a0626d3a .config console log report syz / log C [disk image] [vmlinux] [kernel image] ci-qemu-gce-upstream-auto BUG: unable to handle kernel NULL pointer dereference in filemap_read_folio
2024/12/18 11:17 upstream aef25be35d23 a0626d3a .config console log report syz / log C [disk image] [vmlinux] [kernel image] ci-qemu-gce-upstream-auto BUG: unable to handle kernel NULL pointer dereference in filemap_read_folio
2024/11/13 00:01 upstream 3022e9d00ebe c819f227 .config console log report syz / log C [disk image (non-bootable)] [vmlinux] [kernel image] ci-qemu-upstream BUG: unable to handle kernel NULL pointer dereference in filemap_read_folio
2025/01/03 18:03 upstream 0bc21e701a6f 96d578a3 .config console log report syz / log [disk image] [vmlinux] [kernel image] ci-qemu-gce-upstream-auto BUG: unable to handle kernel NULL pointer dereference in filemap_read_folio
2025/01/24 03:28 upstream 8883957b3c9d 521b0ce3 .config console log report info [disk image] [vmlinux] [kernel image] ci-qemu-gce-upstream-auto BUG: unable to handle kernel NULL pointer dereference in filemap_read_folio
2025/01/23 23:08 upstream 21266b8df522 af620dc7 .config console log report info [disk image] [vmlinux] [kernel image] ci-qemu-gce-upstream-auto BUG: unable to handle kernel NULL pointer dereference in filemap_read_folio
2025/01/23 21:05 upstream 21266b8df522 af620dc7 .config console log report info [disk image] [vmlinux] [kernel image] ci-qemu-gce-upstream-auto BUG: unable to handle kernel NULL pointer dereference in filemap_read_folio
2025/01/23 01:35 upstream df60eac9efe8 9d4f14f8 .config console log report info [disk image] [vmlinux] [kernel image] ci-qemu-gce-upstream-auto BUG: unable to handle kernel NULL pointer dereference in filemap_read_folio
2025/01/22 17:02 upstream c4b9570cfb63 25e17fd3 .config console log report info [disk image] [vmlinux] [kernel image] ci-qemu-gce-upstream-auto BUG: unable to handle kernel NULL pointer dereference in filemap_read_folio
2025/01/22 03:40 upstream 95ec54a420b8 da72ac06 .config console log report info [disk image] [vmlinux] [kernel image] ci-qemu-gce-upstream-auto BUG: unable to handle kernel NULL pointer dereference in filemap_read_folio
2025/01/22 03:37 upstream 95ec54a420b8 da72ac06 .config console log report info [disk image] [vmlinux] [kernel image] ci-qemu-gce-upstream-auto BUG: unable to handle kernel NULL pointer dereference in filemap_read_folio
2025/01/22 00:26 upstream 95ec54a420b8 da72ac06 .config console log report info [disk image] [vmlinux] [kernel image] ci-qemu-gce-upstream-auto BUG: unable to handle kernel NULL pointer dereference in filemap_read_folio
2025/01/21 23:25 upstream 95ec54a420b8 da72ac06 .config console log report info [disk image] [vmlinux] [kernel image] ci-qemu-gce-upstream-auto BUG: unable to handle kernel NULL pointer dereference in filemap_read_folio
2025/01/21 13:06 upstream 3d3a9c8b89d4 6e87cfa2 .config console log report info [disk image] [vmlinux] [kernel image] ci-qemu-gce-upstream-auto BUG: unable to handle kernel NULL pointer dereference in filemap_read_folio
2025/01/21 11:36 upstream 3d3a9c8b89d4 6e87cfa2 .config console log report info [disk image] [vmlinux] [kernel image] ci-qemu-gce-upstream-auto BUG: unable to handle kernel NULL pointer dereference in filemap_read_folio
2025/01/21 09:23 upstream 3d3a9c8b89d4 6e87cfa2 .config console log report info [disk image] [vmlinux] [kernel image] ci-qemu-gce-upstream-auto BUG: unable to handle kernel NULL pointer dereference in filemap_read_folio
2025/01/21 06:41 upstream 3d3a9c8b89d4 6e87cfa2 .config console log report info [disk image] [vmlinux] [kernel image] ci-qemu-gce-upstream-auto BUG: unable to handle kernel NULL pointer dereference in filemap_read_folio
2025/01/21 06:21 upstream ffd294d346d1 6e87cfa2 .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-kasan-gce-selinux-root BUG: unable to handle kernel NULL pointer dereference in filemap_read_folio
2025/01/20 23:26 upstream ffd294d346d1 6e87cfa2 .config console log report info [disk image] [vmlinux] [kernel image] ci-qemu-gce-upstream-auto BUG: unable to handle kernel NULL pointer dereference in filemap_read_folio
2025/01/20 21:03 upstream ffd294d346d1 6e87cfa2 .config console log report info [disk image] [vmlinux] [kernel image] ci-qemu-gce-upstream-auto BUG: unable to handle kernel NULL pointer dereference in filemap_read_folio
2025/01/20 17:42 upstream ffd294d346d1 6e87cfa2 .config console log report info [disk image] [vmlinux] [kernel image] ci-qemu-gce-upstream-auto BUG: unable to handle kernel NULL pointer dereference in filemap_read_folio
2025/01/20 16:37 upstream ffd294d346d1 6e87cfa2 .config console log report info [disk image] [vmlinux] [kernel image] ci-qemu-gce-upstream-auto BUG: unable to handle kernel NULL pointer dereference in filemap_read_folio
2025/01/20 16:37 upstream ffd294d346d1 6e87cfa2 .config console log report info [disk image] [vmlinux] [kernel image] ci-qemu-gce-upstream-auto BUG: unable to handle kernel NULL pointer dereference in filemap_read_folio
2025/01/20 12:57 upstream ffd294d346d1 f2cb035c .config console log report info [disk image] [vmlinux] [kernel image] ci-qemu-gce-upstream-auto BUG: unable to handle kernel NULL pointer dereference in filemap_read_folio
2025/01/20 05:31 upstream 9528d418de4d f2cb035c .config console log report info [disk image] [vmlinux] [kernel image] ci-qemu-gce-upstream-auto BUG: unable to handle kernel NULL pointer dereference in filemap_read_folio
2025/01/20 02:05 upstream 9528d418de4d f2cb035c .config console log report info [disk image] [vmlinux] [kernel image] ci-qemu-gce-upstream-auto BUG: unable to handle kernel NULL pointer dereference in filemap_read_folio
2025/01/20 00:56 upstream 9528d418de4d f2cb035c .config console log report info [disk image] [vmlinux] [kernel image] ci-qemu-gce-upstream-auto BUG: unable to handle kernel NULL pointer dereference in filemap_read_folio
2025/01/19 21:52 upstream 9528d418de4d f2cb035c .config console log report info [disk image] [vmlinux] [kernel image] ci-qemu-gce-upstream-auto BUG: unable to handle kernel NULL pointer dereference in filemap_read_folio
2025/01/19 19:59 upstream 9528d418de4d f2cb035c .config console log report info [disk image] [vmlinux] [kernel image] ci-qemu-gce-upstream-auto BUG: unable to handle kernel NULL pointer dereference in filemap_read_folio
2025/01/19 17:11 upstream fda5e3f28400 f2cb035c .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-kasan-gce-selinux-root BUG: unable to handle kernel NULL pointer dereference in filemap_read_folio
2025/01/19 14:34 upstream fda5e3f28400 f2cb035c .config console log report info [disk image] [vmlinux] [kernel image] ci-qemu-gce-upstream-auto BUG: unable to handle kernel NULL pointer dereference in filemap_read_folio
2025/01/18 23:58 upstream 595523945be0 f2cb035c .config console log report info [disk image] [vmlinux] [kernel image] ci-qemu-gce-upstream-auto BUG: unable to handle kernel NULL pointer dereference in filemap_read_folio
2025/01/18 10:07 upstream 595523945be0 f2cb035c .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-kasan-gce BUG: unable to handle kernel NULL pointer dereference in filemap_read_folio
2025/01/09 08:49 upstream 0b7958fa05d5 f3558dbf .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-kasan-gce-smack-root BUG: unable to handle kernel NULL pointer dereference in filemap_read_folio
2025/01/21 14:28 upstream 95ec54a420b8 6e87cfa2 .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-kasan-gce-386 BUG: unable to handle kernel NULL pointer dereference in filemap_read_folio
2025/01/24 01:13 upstream 8883957b3c9d 521b0ce3 .config console log report info [disk image (non-bootable)] [vmlinux] [kernel image] ci-qemu-upstream BUG: unable to handle kernel NULL pointer dereference in filemap_read_folio
2025/01/23 18:11 upstream 21266b8df522 f6a35ef3 .config console log report [disk image (non-bootable)] [vmlinux] [kernel image] ci-snapshot-upstream-root BUG: unable to handle kernel NULL pointer dereference in filemap_read_folio
2025/01/23 14:08 upstream 21266b8df522 af620dc7 .config console log report info [disk image (non-bootable)] [vmlinux] [kernel image] ci-qemu-upstream BUG: unable to handle kernel NULL pointer dereference in filemap_read_folio
2025/01/23 06:41 upstream df60eac9efe8 9d4f14f8 .config console log report [disk image (non-bootable)] [vmlinux] [kernel image] ci-snapshot-upstream-root BUG: unable to handle kernel NULL pointer dereference in filemap_read_folio
2025/01/23 06:28 upstream df60eac9efe8 9d4f14f8 .config console log report info [disk image (non-bootable)] [vmlinux] [kernel image] ci-qemu-upstream BUG: unable to handle kernel NULL pointer dereference in filemap_read_folio
2025/01/22 23:27 upstream df60eac9efe8 25e17fd3 .config console log report [disk image (non-bootable)] [vmlinux] [kernel image] ci-snapshot-upstream-root BUG: unable to handle kernel NULL pointer dereference in filemap_read_folio
2025/01/22 12:03 upstream c4b9570cfb63 da72ac06 .config console log report [disk image (non-bootable)] [vmlinux] [kernel image] ci-snapshot-upstream-root BUG: unable to handle kernel NULL pointer dereference in filemap_read_folio
2025/01/22 10:48 upstream c4b9570cfb63 da72ac06 .config console log report info [disk image (non-bootable)] [vmlinux] [kernel image] ci-qemu-upstream BUG: unable to handle kernel NULL pointer dereference in filemap_read_folio
2025/01/22 09:42 upstream c4b9570cfb63 da72ac06 .config console log report info [disk image (non-bootable)] [vmlinux] [kernel image] ci-qemu-upstream BUG: unable to handle kernel NULL pointer dereference in filemap_read_folio
2025/01/21 20:14 upstream 95ec54a420b8 da72ac06 .config console log report info [disk image (non-bootable)] [vmlinux] [kernel image] ci-qemu-upstream BUG: unable to handle kernel NULL pointer dereference in filemap_read_folio
2025/01/21 05:14 upstream 3d3a9c8b89d4 6e87cfa2 .config console log report [disk image (non-bootable)] [vmlinux] [kernel image] ci-snapshot-upstream-root BUG: unable to handle kernel NULL pointer dereference in filemap_read_folio
2025/01/21 01:51 upstream ffd294d346d1 6e87cfa2 .config console log report [disk image (non-bootable)] [vmlinux] [kernel image] ci-snapshot-upstream-root BUG: unable to handle kernel NULL pointer dereference in filemap_read_folio
2025/01/20 19:26 upstream ffd294d346d1 6e87cfa2 .config console log report [disk image (non-bootable)] [vmlinux] [kernel image] ci-snapshot-upstream-root BUG: unable to handle kernel NULL pointer dereference in filemap_read_folio
2025/01/20 10:51 upstream ffd294d346d1 f2cb035c .config console log report [disk image (non-bootable)] [vmlinux] [kernel image] ci-snapshot-upstream-root BUG: unable to handle kernel NULL pointer dereference in filemap_read_folio
2025/01/19 15:53 upstream fda5e3f28400 f2cb035c .config console log report [disk image (non-bootable)] [vmlinux] [kernel image] ci-snapshot-upstream-root BUG: unable to handle kernel NULL pointer dereference in filemap_read_folio
2025/01/19 12:03 upstream fda5e3f28400 f2cb035c .config console log report info [disk image (non-bootable)] [vmlinux] [kernel image] ci-qemu-upstream BUG: unable to handle kernel NULL pointer dereference in filemap_read_folio
2025/01/19 08:05 upstream fda5e3f28400 f2cb035c .config console log report [disk image (non-bootable)] [vmlinux] [kernel image] ci-snapshot-upstream-root BUG: unable to handle kernel NULL pointer dereference in filemap_read_folio
2025/01/12 15:32 linux-next 7b4b9bf203da 6dbc6a9b .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-linux-next-kasan-gce-root BUG: unable to handle kernel NULL pointer dereference in filemap_read_folio
* Struck through repros no longer work on HEAD.