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

Status: fixed on 2024/11/12 23:31
Subsystems: erofs
[Documentation on labels]
Reported-by: syzbot+001306cd9c92ce0df23f@syzkaller.appspotmail.com
Fix commit: 416a8b2c02fe erofs: ensure regular inodes for file-backed mounts
First crash: 128d, last: 38d
▶ ▼ Discussions (3)
Title Replies (including bot) Last reply
[PATCH v2] erofs: ensure regular inodes for file-backed mounts 2 (2) 2024/10/11 03:10
[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 (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 (4) fs C 400 1h00m 34d 0/28 upstream: reported C repro on 2024/11/16 23:40
upstream BUG: unable to handle kernel NULL pointer dereference in filemap_read_folio fs mm 8 783d 792d 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 557d 607d 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 (492):
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
2024/10/20 06:21 upstream 715ca9dd687f cd6fc0a3 .config console log report syz / log C [disk image (non-bootable)] [vmlinux] [kernel image] ci-snapshot-upstream-root BUG: unable to handle kernel NULL pointer dereference in filemap_read_folio
2024/09/17 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
2024/11/12 14:14 upstream 2d5404caa8c7 75bb1b32 .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
2024/11/11 06:09 upstream a9cda7c0ffed 6b856513 .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
2024/11/09 12:22 upstream 50643bbc9eb6 6b856513 .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
2024/11/09 08:45 upstream 50643bbc9eb6 6b856513 .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
2024/11/08 14:51 upstream 906bd684e4b1 179b040e .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
2024/11/06 14:25 upstream 2e1b3cc9d7f7 3a465482 .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
2024/11/06 12:29 upstream 2e1b3cc9d7f7 3a465482 .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
2024/11/05 23:37 upstream 2e1b3cc9d7f7 3a465482 .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
2024/11/05 22:28 upstream 2e1b3cc9d7f7 3a465482 .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
2024/10/12 17:04 upstream 09f6b0c8904b 084d8178 .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
2024/10/09 21:45 upstream 75b607fab38d 0278d004 .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-kasan-gce-root 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
2024/11/12 12:36 upstream 2d5404caa8c7 75bb1b32 .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
2024/11/12 19:40 upstream 3022e9d00ebe c819f227 .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
2024/11/12 10:50 upstream 2d5404caa8c7 75bb1b32 .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
2024/11/12 07:47 upstream 2d5404caa8c7 75bb1b32 .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
2024/11/12 05:49 upstream 2d5404caa8c7 75bb1b32 .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
2024/11/12 02:24 upstream 2d5404caa8c7 75bb1b32 .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
2024/11/12 00:49 upstream 2d5404caa8c7 75bb1b32 .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
2024/11/11 22:32 upstream 2d5404caa8c7 75bb1b32 .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
2024/11/11 17:25 upstream 2d5404caa8c7 0c4b1325 .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
2024/11/11 16:16 upstream 2d5404caa8c7 0c4b1325 .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
2024/11/11 15:00 upstream 2d5404caa8c7 0c4b1325 .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
2024/11/11 12:27 upstream 2d5404caa8c7 0c4b1325 .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
2024/11/10 23:25 upstream a9cda7c0ffed 6b856513 .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
2024/11/10 14:38 upstream de2f378f2b77 6b856513 .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
2024/11/10 09:42 upstream de2f378f2b77 6b856513 .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
2024/11/09 22:39 upstream da4373fbcf00 6b856513 .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
2024/11/09 20:13 upstream da4373fbcf00 6b856513 .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
2024/11/09 19:56 upstream da4373fbcf00 6b856513 .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
2024/11/09 11:14 upstream f1dce1f09380 6b856513 .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
2024/11/09 07:26 upstream f1dce1f09380 6b856513 .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
2024/11/09 02:21 upstream f1dce1f09380 6b856513 .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
2024/11/09 00:22 upstream f1dce1f09380 d40c056e .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
2024/11/08 18:57 upstream f1dce1f09380 d40c056e .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
2024/11/08 16:38 upstream 906bd684e4b1 d40c056e .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
2024/11/08 08:32 upstream 906bd684e4b1 179b040e .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
2024/11/08 05:05 upstream 906bd684e4b1 179b040e .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
2024/11/08 03:13 upstream 906bd684e4b1 179b040e .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
2024/11/08 00:10 upstream ff7afaeca1a1 867e44df .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
2024/11/07 22:32 upstream ff7afaeca1a1 867e44df .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
2024/11/07 20:26 upstream ff7afaeca1a1 867e44df .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
2024/11/07 11:53 upstream 7758b206117d df3dc63b .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
2024/11/07 09:31 upstream 7758b206117d df3dc63b .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
2024/11/07 07:57 upstream 7758b206117d df3dc63b .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
2024/11/07 06:40 upstream 7758b206117d df3dc63b .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
2024/11/07 04:28 upstream 7758b206117d df3dc63b .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
2024/11/06 23:26 upstream 7758b206117d 7b852900 .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
2024/11/06 20:40 upstream 7758b206117d 7b852900 .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
2024/11/06 16:04 upstream 2e1b3cc9d7f7 7b852900 .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
2024/11/06 09:54 upstream 2e1b3cc9d7f7 3a465482 .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
2024/11/06 08:20 upstream 2e1b3cc9d7f7 3a465482 .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
2024/11/06 06:34 upstream 2e1b3cc9d7f7 3a465482 .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
2024/11/06 03:31 upstream 2e1b3cc9d7f7 3a465482 .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
2024/10/12 20:28 upstream 09f6b0c8904b 084d8178 .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
2024/11/12 16:43 linux-next 929beafbe7ac 75bb1b32 .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
2024/11/11 09:35 linux-next 929beafbe7ac 6b856513 .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.