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UBSAN: array-index-out-of-bounds in truncate_inode_pages_final

Status: upstream: reported C repro on 2023/07/15 18:53
Bug presence: origin:upstream
Labels: missing-backport
[Documentation on labels]
Reported-by: syzbot+e353a0aff7f485e2b236@syzkaller.appspotmail.com
First crash: 291d, last: 10d
Fix bisection: the issue occurs on the latest tested release (bisect log)
Crash: INFO: rcu detected stall in corrupted (log)
Repro: C syz .config
  
▶ ▼ Bug presence (3)
Date Name Commit Repro Result
2024/01/12 linux-6.1.y (ToT) 7c58bfa711cb C [report] INFO: rcu detected stall in corrupted
2023/07/15 upstream (ToT) 831fe284d827 C [report] UBSAN: array-index-out-of-bounds in truncate_inode_pages_final
2024/01/12 upstream (ToT) cf65598d5909 C Didn't crash
▶ ▼ Similar bugs (2)
Kernel Title Repro Cause bisect Fix bisect Count Last Reported Patched Status
upstream UBSAN: array-index-out-of-bounds in truncate_inode_pages_final ntfs3 C 11 33d 298d 0/26 upstream: reported C repro on 2023/07/09 12:32
upstream BUG: unable to handle kernel NULL pointer dereference in truncate_inode_pages_final ntfs3 1 583d 579d 0/26 auto-obsoleted due to no activity on 2023/01/25 10:14
▶ ▼ Fix bisection attempts (4)
Created Duration User Patch Repo Result
2024/01/16 08:46 3h01m fix candidate upstream job log (0)
2023/12/28 19:53 2h46m bisect fix linux-6.1.y job log (0) log
2023/10/30 21:48 2h39m bisect fix linux-6.1.y job log (0) log
2023/09/29 22:15 2h18m bisect fix linux-6.1.y job log (0) log

Sample crash report:
================================================================================
UBSAN: array-index-out-of-bounds in ./include/linux/pagevec.h:129:2
index 255 is out of range for type 'struct folio *[15]'
CPU: 0 PID: 4771 Comm: syz-executor373 Not tainted 6.1.81-syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/25/2024
Call trace:
 dump_backtrace+0x1c8/0x1f4 arch/arm64/kernel/stacktrace.c:158
 show_stack+0x2c/0x3c arch/arm64/kernel/stacktrace.c:165
 __dump_stack lib/dump_stack.c:88 [inline]
 dump_stack_lvl+0x108/0x170 lib/dump_stack.c:106
 dump_stack+0x1c/0x58 lib/dump_stack.c:113
 ubsan_epilogue lib/ubsan.c:151 [inline]
 __ubsan_handle_out_of_bounds+0xfc/0x148 lib/ubsan.c:282
 folio_batch_add include/linux/pagevec.h:129 [inline]
 find_lock_entries+0x7ac/0xa08 mm/filemap.c:2110
 truncate_inode_pages_range+0x178/0xf10 mm/truncate.c:363
 truncate_inode_pages mm/truncate.c:451 [inline]
 truncate_inode_pages_final+0x90/0xc0 mm/truncate.c:486
 ntfs_evict_inode+0x24/0xc8 fs/ntfs3/inode.c:1762
 evict+0x260/0x68c fs/inode.c:666
 iput_final fs/inode.c:1791 [inline]
 iput+0x7c0/0x8a4 fs/inode.c:1817
 ntfs_fill_super+0x2d88/0x3458 fs/ntfs3/super.c:1190
 get_tree_bdev+0x360/0x54c fs/super.c:1355
 ntfs_fs_get_tree+0x28/0x38 fs/ntfs3/super.c:1359
 vfs_get_tree+0x90/0x274 fs/super.c:1562
 do_new_mount+0x278/0x8fc fs/namespace.c:3051
 path_mount+0x590/0xe5c fs/namespace.c:3381
 do_mount fs/namespace.c:3394 [inline]
 __do_sys_mount fs/namespace.c:3602 [inline]
 __se_sys_mount fs/namespace.c:3579 [inline]
 __arm64_sys_mount+0x45c/0x594 fs/namespace.c:3579
 __invoke_syscall arch/arm64/kernel/syscall.c:38 [inline]
 invoke_syscall+0x98/0x2c0 arch/arm64/kernel/syscall.c:52
 el0_svc_common+0x138/0x258 arch/arm64/kernel/syscall.c:142
 do_el0_svc+0x64/0x218 arch/arm64/kernel/syscall.c:206
 el0_svc+0x58/0x168 arch/arm64/kernel/entry-common.c:637
 el0t_64_sync_handler+0x84/0xf0 arch/arm64/kernel/entry-common.c:655
 el0t_64_sync+0x18c/0x190 arch/arm64/kernel/entry.S:585
================================================================================

Crashes (9):
Time Kernel Commit Syzkaller Config Log Report Syz repro C repro VM info Assets (help?) Manager Title
2024/03/08 22:46 linux-6.1.y 61adba85cc40 8e75c913 .config console log report syz C [disk image] [vmlinux] [kernel image] [mounted in repro] ci2-linux-6-1-kasan-arm64 UBSAN: array-index-out-of-bounds in truncate_inode_pages_final
2024/02/07 21:37 linux-6.1.y f1bb70486c9c 6404acf9 .config console log report syz C [disk image] [vmlinux] [kernel image] [mounted in repro] ci2-linux-6-1-kasan-arm64 UBSAN: array-index-out-of-bounds in truncate_inode_pages_final
2023/11/20 23:41 linux-6.1.y 69e434a1cb21 cb976f63 .config console log report syz C [disk image] [vmlinux] [kernel image] [mounted in repro] ci2-linux-6-1-kasan-arm64 UBSAN: array-index-out-of-bounds in truncate_inode_pages_final
2023/07/15 18:52 linux-6.1.y 61fd484b2cf6 35d9ecc5 .config console log report syz C [disk image] [vmlinux] [kernel image] [mounted in repro] ci2-linux-6-1-kasan-arm64 UBSAN: array-index-out-of-bounds in truncate_inode_pages_final
2023/07/30 02:16 linux-6.1.y d2a6dc4eaf6d 92476829 .config console log report syz C [disk image] [vmlinux] [kernel image] [mounted in repro] ci2-linux-6-1-kasan-arm64 UBSAN: array-index-out-of-bounds in truncate_inode_pages_final
2024/04/22 06:53 linux-6.1.y 6741e066ec76 af24b050 .config console log report syz C [disk image] [vmlinux] [kernel image] [mounted in repro] ci2-linux-6-1-kasan-arm64 KASAN: stack-out-of-bounds Write in truncate_inode_pages_final
2024/04/08 14:14 linux-6.1.y 347385861c50 53df08b6 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-6-1-kasan-arm64 UBSAN: array-index-out-of-bounds in truncate_inode_pages_final
2023/11/27 16:14 linux-6.1.y 69e434a1cb21 7ec6c044 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-6-1-kasan-arm64 UBSAN: array-index-out-of-bounds in truncate_inode_pages_final
2023/07/25 18:28 linux-6.1.y 5302e81aa209 6756545c .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-6-1-kasan-arm64 KASAN: stack-out-of-bounds Write in truncate_inode_pages_final
* Struck through repros no longer work on HEAD.