syzbot


UBSAN: shift-out-of-bounds in ext2_fill_super

Status: upstream: reported C repro on 2023/03/10 21:57
Bug presence: origin:lts-only
[Documentation on labels]
Reported-by: syzbot+2cb887435a9c92a6f4d8@syzkaller.appspotmail.com
First crash: 466d, last: 313d
Bug presence (2)
Date Name Commit Repro Result
2023/05/14 linux-6.1.y (ToT) bf4ad6fa4e53 C [report] UBSAN: shift-out-of-bounds in ext2_fill_super
2023/05/14 upstream (ToT) bb7c241fae62 C Didn't crash
Similar bugs (3)
Kernel Title Repro Cause bisect Fix bisect Count Last Reported Patched Status
upstream UBSAN: shift-out-of-bounds in ext2_fill_super ext4 C 2265 376d 480d 22/27 fixed on 2023/06/08 14:41
upstream UBSAN: shift-out-of-bounds in ext2_fill_super (2) ext4 C 571 328d 372d 23/27 fixed on 2023/10/12 12:48
linux-5.15 UBSAN: shift-out-of-bounds in ext2_fill_super origin:lts-only C error 1031 312d 466d 0/3 upstream: reported C repro on 2023/03/10 14:44
Fix bisection attempts (1)
Created Duration User Patch Repo Result
2023/09/27 08:24 1h31m fix candidate upstream job log (0)

Sample crash report:
loop0: detected capacity change from 0 to 512
================================================================================
UBSAN: shift-out-of-bounds in fs/ext2/super.c:948:25
shift exponent 524290 is too large for 32-bit type 'int'
CPU: 1 PID: 4215 Comm: syz-executor197 Not tainted 6.1.27-syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 04/14/2023
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/0x5c lib/dump_stack.c:113
 ubsan_epilogue lib/ubsan.c:151 [inline]
 __ubsan_handle_shift_out_of_bounds+0x2f4/0x36c lib/ubsan.c:321
 ext2_fill_super+0x2074/0x23fc fs/ext2/super.c:948
 mount_bdev+0x26c/0x368 fs/super.c:1423
 ext2_mount+0x44/0x58 fs/ext2/super.c:1484
 legacy_get_tree+0xd4/0x16c fs/fs_context.c:610
 vfs_get_tree+0x90/0x274 fs/super.c:1553
 do_new_mount+0x25c/0x8c8 fs/namespace.c:3040
 path_mount+0x590/0xe58 fs/namespace.c:3370
 do_mount fs/namespace.c:3383 [inline]
 __do_sys_mount fs/namespace.c:3591 [inline]
 __se_sys_mount fs/namespace.c:3568 [inline]
 __arm64_sys_mount+0x45c/0x594 fs/namespace.c:3568
 __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:581
================================================================================

Crashes (1037):
Time Kernel Commit Syzkaller Config Log Report Syz repro C repro VM info Assets (help?) Manager Title
2023/05/07 07:24 linux-6.1.y ca48fc16c493 90c93c40 .config console log report syz C [disk image] [vmlinux] [kernel image] [mounted in repro] ci2-linux-6-1-kasan-arm64 UBSAN: shift-out-of-bounds in ext2_fill_super
2023/06/09 02:57 linux-6.1.y 76ba310227d2 058b3a5a .config console log report syz C [disk image] [vmlinux] [kernel image] [mounted in repro] ci2-linux-6-1-kasan-arm64 UBSAN: shift-out-of-bounds in ext2_fill_super
2023/05/05 07:43 linux-6.1.y ca48fc16c493 518a39a6 .config console log report syz C [disk image] [vmlinux] [kernel image] [mounted in repro] ci2-linux-6-1-kasan-arm64 UBSAN: shift-out-of-bounds in ext2_fill_super
2023/08/10 15:52 linux-6.1.y 0a4a7855302d da3c3ef8 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-6-1-kasan-arm64 UBSAN: shift-out-of-bounds in ext2_fill_super
2023/08/09 23:04 linux-6.1.y 0a4a7855302d 13ca4cd6 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-6-1-kasan-arm64 UBSAN: shift-out-of-bounds in ext2_fill_super
2023/08/09 08:56 linux-6.1.y 0a4a7855302d 8ad1a287 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-6-1-kasan-arm64 UBSAN: shift-out-of-bounds in ext2_fill_super
2023/08/09 07:18 linux-6.1.y 0a4a7855302d 8ad1a287 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-6-1-kasan-arm64 UBSAN: shift-out-of-bounds in ext2_fill_super
2023/08/09 06:02 linux-6.1.y 0a4a7855302d 8ad1a287 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-6-1-kasan-arm64 UBSAN: shift-out-of-bounds in ext2_fill_super
2023/08/09 01:51 linux-6.1.y 0a4a7855302d 9552ae77 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-6-1-kasan-arm64 UBSAN: shift-out-of-bounds in ext2_fill_super
2023/08/08 20:53 linux-6.1.y 0a4a7855302d 9552ae77 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-6-1-kasan-arm64 UBSAN: shift-out-of-bounds in ext2_fill_super
2023/08/08 14:29 linux-6.1.y 52a953d0934b 9552ae77 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-6-1-kasan-arm64 UBSAN: shift-out-of-bounds in ext2_fill_super
2023/08/08 10:41 linux-6.1.y 52a953d0934b 9552ae77 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-6-1-kasan-arm64 UBSAN: shift-out-of-bounds in ext2_fill_super
2023/08/07 20:29 linux-6.1.y 52a953d0934b b1b6ae3d .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-6-1-kasan-arm64 UBSAN: shift-out-of-bounds in ext2_fill_super
2023/08/07 17:32 linux-6.1.y 52a953d0934b b1b6ae3d .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-6-1-kasan-arm64 UBSAN: shift-out-of-bounds in ext2_fill_super
2023/08/07 13:06 linux-6.1.y 52a953d0934b dda824c4 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-6-1-kasan-arm64 UBSAN: shift-out-of-bounds in ext2_fill_super
2023/08/05 16:25 linux-6.1.y 52a953d0934b 4ffcc9ef .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-6-1-kasan-arm64 UBSAN: shift-out-of-bounds in ext2_fill_super
2023/08/05 06:12 linux-6.1.y 52a953d0934b cdae481e .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-6-1-kasan-arm64 UBSAN: shift-out-of-bounds in ext2_fill_super
2023/08/05 03:16 linux-6.1.y 52a953d0934b cdae481e .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-6-1-kasan-arm64 UBSAN: shift-out-of-bounds in ext2_fill_super
2023/08/04 21:23 linux-6.1.y 52a953d0934b cdae481e .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-6-1-kasan-arm64 UBSAN: shift-out-of-bounds in ext2_fill_super
2023/08/04 17:43 linux-6.1.y 52a953d0934b cdae481e .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-6-1-kasan-arm64 UBSAN: shift-out-of-bounds in ext2_fill_super
2023/08/03 23:28 linux-6.1.y 52a953d0934b 74621247 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-6-1-kasan-arm64 UBSAN: shift-out-of-bounds in ext2_fill_super
2023/08/03 19:22 linux-6.1.y 52a953d0934b 74621247 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-6-1-kasan-arm64 UBSAN: shift-out-of-bounds in ext2_fill_super
2023/08/03 15:14 linux-6.1.y 52a953d0934b 39a91c18 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-6-1-kasan-arm64 UBSAN: shift-out-of-bounds in ext2_fill_super
2023/08/03 12:53 linux-6.1.y 52a953d0934b 39a91c18 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-6-1-kasan-arm64 UBSAN: shift-out-of-bounds in ext2_fill_super
2023/08/03 06:41 linux-6.1.y d2a6dc4eaf6d 39a91c18 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-6-1-kasan-arm64 UBSAN: shift-out-of-bounds in ext2_fill_super
2023/08/02 19:18 linux-6.1.y d2a6dc4eaf6d b178af49 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-6-1-kasan-arm64 UBSAN: shift-out-of-bounds in ext2_fill_super
2023/08/02 15:56 linux-6.1.y d2a6dc4eaf6d b178af49 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-6-1-kasan-arm64 UBSAN: shift-out-of-bounds in ext2_fill_super
2023/08/01 20:37 linux-6.1.y d2a6dc4eaf6d df07ffe8 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-6-1-kasan-arm64 UBSAN: shift-out-of-bounds in ext2_fill_super
2023/07/30 16:22 linux-6.1.y d2a6dc4eaf6d 2a0d0f29 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-6-1-kasan-arm64 UBSAN: shift-out-of-bounds in ext2_fill_super
2023/07/30 14:50 linux-6.1.y d2a6dc4eaf6d 92476829 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-6-1-kasan-arm64 UBSAN: shift-out-of-bounds in ext2_fill_super
2023/07/27 17:55 linux-6.1.y d2a6dc4eaf6d 92476829 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-6-1-kasan-arm64 UBSAN: shift-out-of-bounds in ext2_fill_super
2023/07/27 15:19 linux-6.1.y d2a6dc4eaf6d 92476829 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-6-1-kasan-arm64 UBSAN: shift-out-of-bounds in ext2_fill_super
2023/07/27 13:47 linux-6.1.y d2a6dc4eaf6d 92476829 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-6-1-kasan-arm64 UBSAN: shift-out-of-bounds in ext2_fill_super
2023/07/27 12:00 linux-6.1.y d2a6dc4eaf6d 41fe1bae .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-6-1-kasan-arm64 UBSAN: shift-out-of-bounds in ext2_fill_super
2023/07/27 10:58 linux-6.1.y d2a6dc4eaf6d 41fe1bae .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-6-1-kasan-arm64 UBSAN: shift-out-of-bounds in ext2_fill_super
2023/07/26 22:06 linux-6.1.y 5302e81aa209 41fe1bae .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-6-1-kasan-arm64 UBSAN: shift-out-of-bounds in ext2_fill_super
2023/07/26 19:40 linux-6.1.y 5302e81aa209 41fe1bae .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-6-1-kasan-arm64 UBSAN: shift-out-of-bounds in ext2_fill_super
2023/07/26 18:22 linux-6.1.y 5302e81aa209 41fe1bae .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-6-1-kasan-arm64 UBSAN: shift-out-of-bounds in ext2_fill_super
2023/07/26 17:08 linux-6.1.y 5302e81aa209 41fe1bae .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-6-1-kasan-arm64 UBSAN: shift-out-of-bounds in ext2_fill_super
2023/07/26 15:04 linux-6.1.y 5302e81aa209 2a509c27 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-6-1-kasan-arm64 UBSAN: shift-out-of-bounds in ext2_fill_super
2023/07/26 11:50 linux-6.1.y 5302e81aa209 2a509c27 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-6-1-kasan-arm64 UBSAN: shift-out-of-bounds in ext2_fill_super
2023/07/25 20:43 linux-6.1.y 5302e81aa209 6756545c .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-6-1-kasan-arm64 UBSAN: shift-out-of-bounds in ext2_fill_super
2023/07/25 19:28 linux-6.1.y 5302e81aa209 6756545c .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-6-1-kasan-arm64 UBSAN: shift-out-of-bounds in ext2_fill_super
2023/07/25 17:03 linux-6.1.y 5302e81aa209 6756545c .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-6-1-kasan-arm64 UBSAN: shift-out-of-bounds in ext2_fill_super
2023/07/25 12:47 linux-6.1.y 5302e81aa209 3b91ad04 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-6-1-kasan-arm64 UBSAN: shift-out-of-bounds in ext2_fill_super
2023/07/25 11:22 linux-6.1.y 5302e81aa209 3b91ad04 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-6-1-kasan-arm64 UBSAN: shift-out-of-bounds in ext2_fill_super
2023/07/25 08:05 linux-6.1.y 5302e81aa209 b03242d7 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-6-1-kasan-arm64 UBSAN: shift-out-of-bounds in ext2_fill_super
2023/07/25 01:20 linux-6.1.y 5302e81aa209 b03242d7 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-6-1-kasan-arm64 UBSAN: shift-out-of-bounds in ext2_fill_super
2023/07/25 00:07 linux-6.1.y 5302e81aa209 b03242d7 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-6-1-kasan-arm64 UBSAN: shift-out-of-bounds in ext2_fill_super
2023/07/24 19:57 linux-6.1.y 5302e81aa209 b03242d7 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-6-1-kasan-arm64 UBSAN: shift-out-of-bounds in ext2_fill_super
2023/07/24 12:14 linux-6.1.y 75389113731b b03242d7 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-6-1-kasan-arm64 UBSAN: shift-out-of-bounds in ext2_fill_super
2023/03/10 21:57 linux-6.1.y 8a923980a190 5205ef30 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-6-1-kasan-arm64 UBSAN: shift-out-of-bounds in ext2_fill_super
* Struck through repros no longer work on HEAD.