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Date: Wed, 28 Sep 2022 22:50:40 +0000
From: bugzilla-daemon@...nel.org
To: linux-ext4@...r.kernel.org
Subject: [Bug 216541] New: FUZZ: general protection fault, KASAN:
null-ptr-deref at fs/ext4/ialloc.c:ext4_read_inode_bitmap() when mount a
corrupted image
https://bugzilla.kernel.org/show_bug.cgi?id=216541
Bug ID: 216541
Summary: FUZZ: general protection fault, KASAN: null-ptr-deref
at fs/ext4/ialloc.c:ext4_read_inode_bitmap() when
mount a corrupted image
Product: File System
Version: 2.5
Kernel Version: 5.15.71, 6.0-rc7
Hardware: All
OS: Linux
Tree: Mainline
Status: NEW
Severity: normal
Priority: P1
Component: ext4
Assignee: fs_ext4@...nel-bugs.osdl.org
Reporter: wenqingliu0120@...il.com
Regression: No
Created attachment 301892
--> https://bugzilla.kernel.org/attachment.cgi?id=301892&action=edit
corrupted image and .config
- Overview
FUZZ: general protection fault, KASAN: null-ptr-deref at
fs/ext4/ialloc.c:ext4_read_inode_bitmap() when mount a corrupted image
- Reproduce
Tested on kernel 5.15.71, 6.0-rc7
# mkdir mnt
# mount tmp303.img mnt
-Kernel dump
[ 468.970349] loop5: detected capacity change from 0 to 32768
[ 469.031258] EXT4-fs (loop5): warning: mounting unchecked fs, running e2fsck
is recommended
[ 469.034841] EXT4-fs error (device loop5): ext4_clear_blocks:866: inode #32:
comm mount: attempt to clear invalid blocks 16777450 len 1
[ 469.034935] EXT4-fs error (device loop5): ext4_free_branches:1012: inode
#32: comm mount: invalid indirect mapped block 1258291200 (level 1)
[ 469.034991] EXT4-fs error (device loop5): ext4_free_branches:1012: inode
#32: comm mount: invalid indirect mapped block 7379847 (level 2)
[ 469.035539] general protection fault, probably for non-canonical address
0xdffffc0000000000: 0000 [#1] PREEMPT SMP KASAN NOPTI
[ 469.035603] KASAN: null-ptr-deref in range
[0x0000000000000000-0x0000000000000007]
[ 469.035636] CPU: 1 PID: 1088 Comm: mount Not tainted 6.0.0-rc7 #1
[ 469.035665] Hardware name: QEMU Standard PC (Q35 + ICH9, 2009), BIOS
1.15.0-1 04/01/2014
[ 469.035699] RIP: 0010:ext4_read_inode_bitmap+0x682/0x1240
[ 469.035730] Code: 80 3c 02 00 0f 85 ac 0b 00 00 49 8b 87 b8 02 00 00 8b 54
24 08 4c 8d 3c d0 48 b8 00 00 00 00 00 fc ff df 4c 89 fa 48 c1 ea 03 <80> 3c 02
00 0f 85 75 0b 00 00 4d 8b 3f e8 6c fa 78 ff 48 b8 00 00
[ 469.035803] RSP: 0018:ffffc900007ff730 EFLAGS: 00010246
[ 469.035830] RAX: dffffc0000000000 RBX: 0000000000000000 RCX:
1ffff11024f21407
[ 469.035861] RDX: 0000000000000000 RSI: ffff88812ea2e0a8 RDI:
ffff88812790a2b8
[ 469.035891] RBP: 0000000000000000 R08: 0000000000000002 R09:
ffffed1025d45c16
[ 469.035921] R10: ffff88812ea2e0af R11: ffffed1025d45c15 R12:
ffff888142dd7800
[ 469.035951] R13: ffff888125c07000 R14: ffff88812ea2e0a8 R15:
0000000000000000
[ 469.035981] FS: 00007f99fcf24840(0000) GS:ffff888293680000(0000)
knlGS:0000000000000000
[ 469.036015] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
[ 469.036040] CR2: 000055c988e952f8 CR3: 0000000121fb8003 CR4:
0000000000370ee0
[ 469.036072] DR0: 0000000000000000 DR1: 0000000000000000 DR2:
0000000000000000
[ 469.036101] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7:
0000000000000400
[ 469.036131] Call Trace:
[ 469.036144] <TASK>
[ 469.036156] ext4_free_inode+0x451/0xfb0
[ 469.036179] ? ext4_mark_bitmap_end+0x20/0x20
[ 469.036200] ? __ext4_journal_start_sb+0x23f/0x2d0
[ 469.036223] ext4_evict_inode+0xaf4/0x14e0
[ 469.036243] ? complete_all+0xc0/0xc0
[ 469.036262] ? ext4_da_write_begin+0x6b0/0x6b0
[ 469.036283] ? _raw_spin_lock_irqsave+0xf0/0xf0
[ 469.036305] ? _raw_spin_lock_irqsave+0xf0/0xf0
[ 469.036326] ? kmem_cache_alloc+0x13b/0x4e0
[ 469.036347] evict+0x284/0x4e0
[ 469.036364] ext4_setup_system_zone+0x66c/0x840
[ 469.036386] ? preempt_schedule_common+0x5e/0xd0
[ 469.036408] ? ext4_exit_system_zone+0x20/0x20
[ 469.036429] ? ext4_setup_super+0x3b7/0x8e0
[ 469.036449] ? _raw_spin_unlock+0x15/0x30
[ 469.036468] ext4_fill_super+0x999c/0xea10
[ 469.036490] ? ext4_reconfigure+0x2250/0x2250
[ 469.036511] ? down_write+0xad/0x120
[ 469.037418] ? snprintf+0x9e/0xd0
[ 469.038319] ? vsprintf+0x10/0x10
[ 469.039200] ? mutex_unlock+0x80/0xd0
[ 469.040054] ? __mutex_unlock_slowpath.isra.0+0x2d0/0x2d0
[ 469.040909] ? sget_fc+0x4e9/0x6b0
[ 469.041726] ? get_tree_bdev+0x388/0x660
[ 469.042506] get_tree_bdev+0x388/0x660
[ 469.043256] ? ext4_reconfigure+0x2250/0x2250
[ 469.043983] vfs_get_tree+0x81/0x2b0
[ 469.044681] ? ns_capable_common+0x57/0xe0
[ 469.045363] path_mount+0x47e/0x19d0
[ 469.046027] ? kasan_quarantine_put+0x55/0x180
[ 469.046677] ? finish_automount+0x5f0/0x5f0
[ 469.047312] ? user_path_at_empty+0x45/0x60
[ 469.047934] ? kmem_cache_free+0x1c2/0x4e0
[ 469.048533] do_mount+0xce/0xf0
[ 469.049122] ? path_mount+0x19d0/0x19d0
[ 469.049694] ? _copy_from_user+0x50/0x80
[ 469.050253] ? memdup_user+0x4e/0xa0
[ 469.050804] __x64_sys_mount+0x12c/0x1a0
[ 469.051353] do_syscall_64+0x38/0x90
[ 469.051895] entry_SYSCALL_64_after_hwframe+0x63/0xcd
[ 469.052442] RIP: 0033:0x7f99fd184c7e
[ 469.052990] Code: 48 8b 0d 15 c2 0c 00 f7 d8 64 89 01 48 83 c8 ff c3 66 2e
0f 1f 84 00 00 00 00 00 90 f3 0f 1e fa 49 89 ca b8 a5 00 00 00 0f 05 <48> 3d 01
f0 ff ff 73 01 c3 48 8b 0d e2 c1 0c 00 f7 d8 64 89 01 48
[ 469.054144] RSP: 002b:00007fff57286818 EFLAGS: 00000246 ORIG_RAX:
00000000000000a5
[ 469.054732] RAX: ffffffffffffffda RBX: 00007f99fd2b6204 RCX:
00007f99fd184c7e
[ 469.055332] RDX: 000055c988e8de90 RSI: 000055c988e87370 RDI:
000055c988e8de30
[ 469.055928] RBP: 000055c988e85460 R08: 0000000000000000 R09:
00007f99fd251d60
[ 469.056531] R10: 0000000000000000 R11: 0000000000000246 R12:
0000000000000000
[ 469.057145] R13: 000055c988e8de30 R14: 000055c988e8de90 R15:
000055c988e85460
[ 469.057764] </TASK>
[ 469.058366] Modules linked in: joydev input_leds serio_raw qemu_fw_cfg xfs
autofs4 raid10 raid456 async_raid6_recov async_memcpy async_pq async_xor
async_tx raid1 raid0 multipath linear qxl drm_ttm_helper ttm drm_kms_helper
hid_generic syscopyarea usbhid sysfillrect sysimgblt fb_sys_fops hid
crct10dif_pclmul drm crc32_pclmul ghash_clmulni_intel aesni_intel crypto_simd
cryptd psmouse
[ 469.061085] ---[ end trace 0000000000000000 ]---
[ 469.062245] RIP: 0010:ext4_read_inode_bitmap+0x682/0x1240
[ 469.063133] Code: 80 3c 02 00 0f 85 ac 0b 00 00 49 8b 87 b8 02 00 00 8b 54
24 08 4c 8d 3c d0 48 b8 00 00 00 00 00 fc ff df 4c 89 fa 48 c1 ea 03 <80> 3c 02
00 0f 85 75 0b 00 00 4d 8b 3f e8 6c fa 78 ff 48 b8 00 00
[ 469.065120] RSP: 0018:ffffc900007ff730 EFLAGS: 00010246
[ 469.066087] RAX: dffffc0000000000 RBX: 0000000000000000 RCX:
1ffff11024f21407
[ 469.067293] RDX: 0000000000000000 RSI: ffff88812ea2e0a8 RDI:
ffff88812790a2b8
[ 469.068371] RBP: 0000000000000000 R08: 0000000000000002 R09:
ffffed1025d45c16
[ 469.069678] R10: ffff88812ea2e0af R11: ffffed1025d45c15 R12:
ffff888142dd7800
[ 469.070731] R13: ffff888125c07000 R14: ffff88812ea2e0a8 R15:
0000000000000000
[ 469.072092] FS: 00007f99fcf24840(0000) GS:ffff888293680000(0000)
knlGS:0000000000000000
[ 469.073541] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
[ 469.074966] CR2: 000055c988e952f8 CR3: 0000000121fb8003 CR4:
0000000000370ee0
[ 469.075781] DR0: 0000000000000000 DR1: 0000000000000000 DR2:
0000000000000000
[ 469.076595] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7:
0000000000000400
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