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BUG: unable to handle kernel NULL pointer dereference in filemap_read_folio (3)

Status: upstream: reported C repro on 2024/09/17 04:59
Subsystems: erofs mm
[Documentation on labels]
Reported-by: syzbot+001306cd9c92ce0df23f@syzkaller.appspotmail.com
Fix commit: erofs: ensure regular inodes for file-backed mounts
Patched on: [ci-upstream-linux-next-kasan-gce-root], missing on: [ci-qemu-gce-upstream-auto ci-qemu-native-arm64-kvm ci-qemu-upstream ci-qemu-upstream-386 ci-qemu2-arm32 ci-qemu2-arm64 ci-qemu2-arm64-compat ci-qemu2-arm64-mte ci-qemu2-riscv64 ci-snapshot-upstream-root ci-upstream-bpf-kasan-gce ci-upstream-bpf-next-kasan-gce ci-upstream-gce-arm64 ci-upstream-gce-leak ci-upstream-kasan-badwrites-root ci-upstream-kasan-gce ci-upstream-kasan-gce-386 ci-upstream-kasan-gce-root ci-upstream-kasan-gce-selinux-root ci-upstream-kasan-gce-smack-root ci-upstream-kmsan-gce-386-root ci-upstream-kmsan-gce-root ci-upstream-net-kasan-gce ci-upstream-net-this-kasan-gce ci2-upstream-fs ci2-upstream-kcsan-gce ci2-upstream-usb]
First crash: 55d, last: now
▶ ▼ Discussions (3)
Title Replies (including bot) Last reply
[PATCH v2] erofs: ensure regular inodes for file-backed mounts 1 (1) 2024/09/17 13:08
[syzbot] [erofs?] [mm?] BUG: unable to handle kernel NULL pointer dereference in filemap_read_folio (3) 1 (3) 2024/09/17 07:02
[PATCH] erofs: ensure regular inodes for file-backed mounts 1 (1) 2024/09/17 05:58
▶ ▼ Similar bugs (2)
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 fs mm 8 709d 719d 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 483d 533d 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
2024/09/17 06:39 21m hsiangkao@linux.alibaba.com git://git.kernel.org/pub/scm/linux/kernel/git/xiang/erofs.git dev-test OK log

Sample crash report:
vfat: Unknown parameter 's'
./file1: Can't lookup blockdev
BUG: kernel NULL pointer dereference, address: 0000000000000000
#PF: supervisor instruction fetch in kernel mode
#PF: error_code(0x0010) - not-present page
PGD 8000000074401067 P4D 8000000074401067 PUD 74410067 PMD 0 
Oops: Oops: 0010 [#1] PREEMPT SMP KASAN PTI
CPU: 0 UID: 0 PID: 5218 Comm: syz-executor218 Not tainted 6.11.0-syzkaller-08481-g88264981f208 #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 08/06/2024
RIP: 0010:0x0
Code: Unable to access opcode bytes at 0xffffffffffffffd6.
RSP: 0018:ffffc90002e7f9f8 EFLAGS: 00010293
RAX: ffffffff81cd4cdc RBX: 0000000000000000 RCX: ffff88802c658000
RDX: 0000000000000000 RSI: ffffea0001cd4f00 RDI: 0000000000000000
RBP: ffffc90002e7fab0 R08: ffffffff81cd4ca6 R09: 1ffffd400039a9e0
R10: dffffc0000000000 R11: 0000000000000000 R12: 1ffffd400039a9e0
R13: ffffea0001cd4f00 R14: ffffc90002e7fa40 R15: 1ffffd400039a9e1
FS:  0000555585b2e380(0000) GS:ffff8880b8600000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: ffffffffffffffd6 CR3: 0000000071830000 CR4: 00000000003506f0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Call Trace:
 <TASK>
 filemap_read_folio+0x14b/0x630 mm/filemap.c:2363
 do_read_cache_folio+0x3f5/0x850 mm/filemap.c:3821
 read_mapping_folio include/linux/pagemap.h:1011 [inline]
 erofs_bread+0x499/0xd40 fs/erofs/data.c:41
 erofs_read_superblock fs/erofs/super.c:277 [inline]
 erofs_fc_fill_super+0x345/0x1770 fs/erofs/super.c:621
 vfs_get_super fs/super.c:1280 [inline]
 get_tree_nodev+0xb7/0x140 fs/super.c:1299
 vfs_get_tree+0x90/0x2b0 fs/super.c:1800
 do_new_mount+0x2be/0xb40 fs/namespace.c:3507
 do_mount fs/namespace.c:3847 [inline]
 __do_sys_mount fs/namespace.c:4055 [inline]
 __se_sys_mount+0x2d6/0x3c0 fs/namespace.c:4032
 do_syscall_x64 arch/x86/entry/common.c:52 [inline]
 do_syscall_64+0xf3/0x230 arch/x86/entry/common.c:83
 entry_SYSCALL_64_after_hwframe+0x77/0x7f
RIP: 0033:0x7f78950a6af9
Code: 28 00 00 00 75 05 48 83 c4 28 c3 e8 61 17 00 00 90 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:00007fff13b372f8 EFLAGS: 00000246 ORIG_RAX: 00000000000000a5
RAX: ffffffffffffffda RBX: 6d616e74726f6873 RCX: 00007f78950a6af9
RDX: 00000000200005c0 RSI: 0000000020000580 RDI: 0000000020000540
RBP: 0031656c69662f2e R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000200000 R11: 0000000000000246 R12: 74616c785f696e75
R13: 746e6e69773d656d R14: 646578696d3d656d R15: 0000000000000001
 </TASK>
Modules linked in:
CR2: 0000000000000000
---[ end trace 0000000000000000 ]---
RIP: 0010:0x0
Code: Unable to access opcode bytes at 0xffffffffffffffd6.
RSP: 0018:ffffc90002e7f9f8 EFLAGS: 00010293
RAX: ffffffff81cd4cdc RBX: 0000000000000000 RCX: ffff88802c658000
RDX: 0000000000000000 RSI: ffffea0001cd4f00 RDI: 0000000000000000
RBP: ffffc90002e7fab0 R08: ffffffff81cd4ca6 R09: 1ffffd400039a9e0
R10: dffffc0000000000 R11: 0000000000000000 R12: 1ffffd400039a9e0
R13: ffffea0001cd4f00 R14: ffffc90002e7fa40 R15: 1ffffd400039a9e1
FS:  0000555585b2e380(0000) GS:ffff8880b8600000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: ffffffffffffffd6 CR3: 0000000071830000 CR4: 00000000003506f0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400

Crashes (199):
Time Kernel Commit Syzkaller Config Log Report Syz repro C repro VM info Assets (help?) Manager Title
2024/09/22 11:58 upstream 88264981f208 6f888b75 .config strace log report syz / log C [disk image] [vmlinux] [kernel image] [mounted in repro] ci2-upstream-fs BUG: unable to handle kernel NULL pointer dereference in filemap_read_folio
2024/09/17 04:58 upstream a430d95c5efa c673ca06 .config console log report syz / log C [disk image (non-bootable)] [vmlinux] [kernel image] [mounted in repro] ci-snapshot-upstream-root BUG: unable to handle kernel NULL pointer dereference in filemap_read_folio
2024/10/08 13:30 upstream 87d6aab2389e 402f1df0 .config console log report info [disk image] [vmlinux] [kernel image] ci2-upstream-fs BUG: unable to handle kernel NULL pointer dereference in filemap_read_folio
2024/10/08 11:57 upstream 87d6aab2389e 402f1df0 .config console log report info [disk image] [vmlinux] [kernel image] ci2-upstream-fs BUG: unable to handle kernel NULL pointer dereference in filemap_read_folio
2024/10/07 13:33 upstream 8cf0b93919e1 d7906eff .config console log report info [disk image] [vmlinux] [kernel image] ci2-upstream-fs BUG: unable to handle kernel NULL pointer dereference in filemap_read_folio
2024/10/06 21:07 upstream 8f602276d390 d7906eff .config console log report info [disk image] [vmlinux] [kernel image] ci2-upstream-fs BUG: unable to handle kernel NULL pointer dereference in filemap_read_folio
2024/10/06 16:06 upstream 8f602276d390 d7906eff .config console log report info [disk image] [vmlinux] [kernel image] ci2-upstream-fs BUG: unable to handle kernel NULL pointer dereference in filemap_read_folio
2024/10/06 11:10 upstream fc20a3e57247 d7906eff .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
2024/10/05 23:24 upstream fc20a3e57247 d7906eff .config console log report info [disk image] [vmlinux] [kernel image] ci2-upstream-fs BUG: unable to handle kernel NULL pointer dereference in filemap_read_folio
2024/10/05 20:35 upstream 27cc6fdf7201 d7906eff .config console log report info [disk image] [vmlinux] [kernel image] ci2-upstream-fs BUG: unable to handle kernel NULL pointer dereference in filemap_read_folio
2024/10/05 07:39 upstream 360c1f1f24c6 d7906eff .config console log report info [disk image] [vmlinux] [kernel image] ci2-upstream-fs BUG: unable to handle kernel NULL pointer dereference in filemap_read_folio
2024/10/05 05:56 upstream 360c1f1f24c6 d7906eff .config console log report info [disk image] [vmlinux] [kernel image] ci2-upstream-fs BUG: unable to handle kernel NULL pointer dereference in filemap_read_folio
2024/10/05 04:36 upstream 360c1f1f24c6 d7906eff .config console log report info [disk image] [vmlinux] [kernel image] ci2-upstream-fs BUG: unable to handle kernel NULL pointer dereference in filemap_read_folio
2024/10/05 03:25 upstream 360c1f1f24c6 d7906eff .config console log report info [disk image] [vmlinux] [kernel image] ci2-upstream-fs BUG: unable to handle kernel NULL pointer dereference in filemap_read_folio
2024/10/04 20:46 upstream 360c1f1f24c6 d7906eff .config console log report info [disk image] [vmlinux] [kernel image] ci2-upstream-fs BUG: unable to handle kernel NULL pointer dereference in filemap_read_folio
2024/10/04 09:55 upstream 0c559323bbaa d7906eff .config console log report info [disk image] [vmlinux] [kernel image] ci2-upstream-fs BUG: unable to handle kernel NULL pointer dereference in filemap_read_folio
2024/10/03 21:17 upstream 7ec462100ef9 d7906eff .config console log report info [disk image] [vmlinux] [kernel image] ci2-upstream-fs BUG: unable to handle kernel NULL pointer dereference in filemap_read_folio
2024/10/03 03:42 upstream f23aa4c0761a a4c7fd36 .config console log report info [disk image] [vmlinux] [kernel image] ci2-upstream-fs BUG: unable to handle kernel NULL pointer dereference in filemap_read_folio
2024/10/03 00:05 upstream f23aa4c0761a 02f9582a .config console log report info [disk image] [vmlinux] [kernel image] ci2-upstream-fs BUG: unable to handle kernel NULL pointer dereference in filemap_read_folio
2024/10/01 22:56 upstream e32cde8d2bd7 ea2b66a6 .config console log report info [disk image] [vmlinux] [kernel image] ci2-upstream-fs BUG: unable to handle kernel NULL pointer dereference in filemap_read_folio
2024/10/01 18:21 upstream e32cde8d2bd7 ea2b66a6 .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
2024/09/30 16:47 upstream 9852d85ec9d4 bbd4e0a4 .config console log report info [disk image] [vmlinux] [kernel image] ci2-upstream-fs BUG: unable to handle kernel NULL pointer dereference in filemap_read_folio
2024/08/14 13:24 upstream 6b0f8db921ab 890d2dda .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
2024/10/08 09:36 upstream 87d6aab2389e 402f1df0 .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
2024/10/07 20:25 upstream 8cf0b93919e1 d7906eff .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
2024/10/07 19:18 upstream 8cf0b93919e1 d7906eff .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
2024/10/07 15:14 upstream 8cf0b93919e1 d7906eff .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
2024/10/07 10:08 upstream 2a130b7e1fcd d7906eff .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
2024/10/07 07:25 upstream 2a130b7e1fcd d7906eff .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
2024/10/07 05:13 upstream 2a130b7e1fcd d7906eff .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
2024/10/06 18:33 upstream 8f602276d390 d7906eff .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
2024/10/06 05:40 upstream fc20a3e57247 d7906eff .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
2024/10/05 18:30 upstream 27cc6fdf7201 d7906eff .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
2024/10/05 01:31 upstream 0c559323bbaa d7906eff .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
2024/10/05 00:04 upstream 0c559323bbaa d7906eff .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
2024/10/04 18:21 upstream 0c559323bbaa d7906eff .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
2024/10/04 12:49 upstream 3840cbe24cf0 d7906eff .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
2024/10/04 06:49 upstream 3840cbe24cf0 d7906eff .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
2024/10/03 10:36 upstream f23aa4c0761a a4c7fd36 .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
2024/10/03 08:54 upstream f23aa4c0761a a4c7fd36 .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
2024/10/02 05:16 upstream e32cde8d2bd7 ea2b66a6 .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
2024/10/01 21:39 upstream e32cde8d2bd7 e9f6e118 .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
2024/10/01 16:02 upstream e32cde8d2bd7 e9f6e118 .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
2024/10/01 06:03 upstream e32cde8d2bd7 bbd4e0a4 .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
2024/10/01 02:21 upstream e32cde8d2bd7 bbd4e0a4 .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
2024/09/30 21:05 upstream 9852d85ec9d4 179f4029 .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
2024/09/30 20:04 upstream 9852d85ec9d4 179f4029 .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
2024/09/30 16:08 upstream 9852d85ec9d4 179f4029 .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
2024/09/30 10:06 upstream 9852d85ec9d4 ba29ff75 .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
2024/09/28 22:44 upstream ad46e8f95e93 ba29ff75 .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
2024/10/08 07:58 upstream 87d6aab2389e 402f1df0 .config console log report info [disk image (non-bootable)] [vmlinux] [kernel image] ci-qemu-upstream-386 BUG: unable to handle kernel NULL pointer dereference in filemap_read_folio
2024/10/05 16:01 upstream 27cc6fdf7201 d7906eff .config console log report info [disk image (non-bootable)] [vmlinux] [kernel image] ci-qemu-upstream-386 BUG: unable to handle kernel NULL pointer dereference in filemap_read_folio
2024/10/03 19:05 upstream 7ec462100ef9 d7906eff .config console log report info [disk image (non-bootable)] [vmlinux] [kernel image] ci-qemu-upstream-386 BUG: unable to handle kernel NULL pointer dereference in filemap_read_folio
2024/10/02 07:43 upstream e32cde8d2bd7 ea2b66a6 .config console log report info [disk image (non-bootable)] [vmlinux] [kernel image] ci-qemu-upstream-386 BUG: unable to handle kernel NULL pointer dereference in filemap_read_folio
2024/09/30 00:37 upstream e7ed34365879 ba29ff75 .config console log report info [disk image (non-bootable)] [vmlinux] [kernel image] ci-qemu-upstream-386 BUG: unable to handle kernel NULL pointer dereference in filemap_read_folio
* Struck through repros no longer work on HEAD.