syzbot


KASAN: wild-memory-access Read in read_block_bitmap

Status: upstream: reported C repro on 2023/10/12 02:25
Subsystems: ext4
[Documentation on labels]
Reported-by: syzbot+47f3372b693d7f62b8ae@syzkaller.appspotmail.com
First crash: 230d, last: 51d
Discussions (2)
Title Replies (including bot) Last reply
[syzbot] Monthly ext4 report (Apr 2024) 0 (1) 2024/04/12 13:18
[syzbot] [ext4?] KASAN: wild-memory-access Read in read_block_bitmap 0 (1) 2023/10/12 02:25
Similar bugs (1)
Kernel Title Repro Cause bisect Fix bisect Count Last Reported Patched Status
linux-6.1 KASAN: wild-memory-access Read in read_block_bitmap origin:upstream missing-backport C inconclusive 13 51d 230d 0/3 upstream: reported C repro on 2023/10/08 02:34
Last patch testing requests (10)
Created Duration User Patch Repo Result
2024/04/20 13:24 25m retest repro git://git.kernel.org/pub/scm/linux/kernel/git/arm64/linux.git for-kernelci OK log
2024/04/20 13:24 30m retest repro git://git.kernel.org/pub/scm/linux/kernel/git/arm64/linux.git for-kernelci OK log
2024/03/22 13:52 26m retest repro git://git.kernel.org/pub/scm/linux/kernel/git/arm64/linux.git for-kernelci OK log
2024/02/06 01:42 25m retest repro git://git.kernel.org/pub/scm/linux/kernel/git/arm64/linux.git for-kernelci OK log
2024/02/06 01:42 25m retest repro git://git.kernel.org/pub/scm/linux/kernel/git/arm64/linux.git for-kernelci OK log
2024/01/09 14:36 25m retest repro git://git.kernel.org/pub/scm/linux/kernel/git/arm64/linux.git for-kernelci report log
2023/11/25 10:56 28m retest repro git://git.kernel.org/pub/scm/linux/kernel/git/arm64/linux.git for-kernelci report log
2023/11/25 10:56 27m retest repro git://git.kernel.org/pub/scm/linux/kernel/git/arm64/linux.git for-kernelci report log
2023/10/31 13:58 29m retest repro git://git.kernel.org/pub/scm/linux/kernel/git/arm64/linux.git for-kernelci report log
2023/10/15 20:26 26m mukattreyee@gmail.com https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git master report log

Sample crash report:
EXT2-fs (loop0): error: ext2_valid_block_bitmap: Invalid block bitmap - block_group = 0, block = 252
EXT2-fs (loop0): error: ext2_free_blocks: Freeing blocks not in datazone - block = 1, count = 1
==================================================================
BUG: KASAN: wild-memory-access in generic_test_bit include/asm-generic/bitops/generic-non-atomic.h:128 [inline]
BUG: KASAN: wild-memory-access in test_bit_le include/asm-generic/bitops/le.h:21 [inline]
BUG: KASAN: wild-memory-access in ext2_valid_block_bitmap fs/ext2/balloc.c:86 [inline]
BUG: KASAN: wild-memory-access in read_block_bitmap+0x388/0x698 fs/ext2/balloc.c:153
Read of size 8 at addr 1fff0000dc6f8ff8 by task syz-executor234/6171

CPU: 0 PID: 6171 Comm: syz-executor234 Not tainted 6.8.0-rc7-syzkaller-g707081b61156 #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 03/27/2024
Call trace:
 dump_backtrace+0x1b8/0x1e4 arch/arm64/kernel/stacktrace.c:291
 show_stack+0x2c/0x3c arch/arm64/kernel/stacktrace.c:298
 __dump_stack lib/dump_stack.c:88 [inline]
 dump_stack_lvl+0xd0/0x124 lib/dump_stack.c:106
 print_report+0xe4/0x518 mm/kasan/report.c:491
 kasan_report+0xd8/0x138 mm/kasan/report.c:601
 __asan_report_load8_noabort+0x20/0x2c mm/kasan/report_generic.c:381
 generic_test_bit include/asm-generic/bitops/generic-non-atomic.h:128 [inline]
 test_bit_le include/asm-generic/bitops/le.h:21 [inline]
 ext2_valid_block_bitmap fs/ext2/balloc.c:86 [inline]
 read_block_bitmap+0x388/0x698 fs/ext2/balloc.c:153
 ext2_free_blocks+0x284/0x998 fs/ext2/balloc.c:514
 ext2_free_data fs/ext2/inode.c:1111 [inline]
 ext2_free_branches+0x38c/0x3c4 fs/ext2/inode.c:1159
 ext2_free_branches+0x180/0x3c4 fs/ext2/inode.c:1150
 __ext2_truncate_blocks+0x93c/0xd00 fs/ext2/inode.c:1225
 ext2_setsize fs/ext2/inode.c:1291 [inline]
 ext2_setattr+0x774/0xa40 fs/ext2/inode.c:1660
 notify_change+0x9d4/0xc8c fs/attr.c:499
 do_truncate+0x1c0/0x28c fs/open.c:66
 handle_truncate fs/namei.c:3303 [inline]
 do_open fs/namei.c:3649 [inline]
 path_openat+0x2170/0x2830 fs/namei.c:3802
 do_filp_open+0x1bc/0x3cc fs/namei.c:3829
 do_sys_openat2+0x124/0x1b8 fs/open.c:1404
 do_sys_open fs/open.c:1419 [inline]
 __do_sys_openat fs/open.c:1435 [inline]
 __se_sys_openat fs/open.c:1430 [inline]
 __arm64_sys_openat+0x1f0/0x240 fs/open.c:1430
 __invoke_syscall arch/arm64/kernel/syscall.c:34 [inline]
 invoke_syscall+0x98/0x2b8 arch/arm64/kernel/syscall.c:48
 el0_svc_common+0x130/0x23c arch/arm64/kernel/syscall.c:133
 do_el0_svc+0x48/0x58 arch/arm64/kernel/syscall.c:152
 el0_svc+0x54/0x168 arch/arm64/kernel/entry-common.c:712
 el0t_64_sync_handler+0x84/0xfc arch/arm64/kernel/entry-common.c:730
 el0t_64_sync+0x190/0x194 arch/arm64/kernel/entry.S:598
==================================================================
EXT2-fs (loop0): error: ext2_valid_block_bitmap: Invalid block bitmap - block_group = 0, block = 0
EXT2-fs (loop0): error: ext2_free_blocks: Freeing blocks in system zones - Block = 3, count = 1
EXT2-fs (loop0): error: ext2_free_blocks: Freeing blocks in system zones - Block = 2, count = 1

Crashes (33):
Time Kernel Commit Syzkaller Config Log Report Syz repro C repro VM info Assets (help?) Manager Title
2024/04/03 10:18 git://git.kernel.org/pub/scm/linux/kernel/git/arm64/linux.git for-kernelci 707081b61156 7925100d .config console log report syz C [disk image] [vmlinux] [kernel image] [mounted in repro] ci-upstream-gce-arm64 KASAN: wild-memory-access Read in read_block_bitmap
2024/03/27 18:59 git://git.kernel.org/pub/scm/linux/kernel/git/arm64/linux.git for-kernelci 707081b61156 454571b6 .config console log report syz C [disk image] [vmlinux] [kernel image] [mounted in repro] ci-upstream-gce-arm64 KASAN: wild-memory-access Read in read_block_bitmap
2023/11/11 10:26 git://git.kernel.org/pub/scm/linux/kernel/git/arm64/linux.git for-kernelci 8de1e7afcc1c 6d6dbf8a .config console log report syz C [disk image] [vmlinux] [kernel image] [mounted in repro] ci-upstream-gce-arm64 KASAN: wild-memory-access Read in read_block_bitmap
2023/11/08 03:00 git://git.kernel.org/pub/scm/linux/kernel/git/arm64/linux.git for-kernelci 8de1e7afcc1c 83211397 .config console log report syz C [disk image] [vmlinux] [kernel image] [mounted in repro] ci-upstream-gce-arm64 KASAN: wild-memory-access Read in read_block_bitmap
2023/10/08 03:28 git://git.kernel.org/pub/scm/linux/kernel/git/arm64/linux.git for-kernelci 19af4a4ed414 5e837c76 .config console log report syz C [disk image] [vmlinux] [kernel image] [mounted in repro] ci-upstream-gce-arm64 KASAN: wild-memory-access Read in read_block_bitmap
2024/04/03 07:25 git://git.kernel.org/pub/scm/linux/kernel/git/arm64/linux.git for-kernelci 707081b61156 7925100d .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-gce-arm64 KASAN: wild-memory-access Read in read_block_bitmap
2024/04/03 07:25 git://git.kernel.org/pub/scm/linux/kernel/git/arm64/linux.git for-kernelci 707081b61156 7925100d .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-gce-arm64 KASAN: wild-memory-access Read in read_block_bitmap
2024/04/03 07:21 git://git.kernel.org/pub/scm/linux/kernel/git/arm64/linux.git for-kernelci 707081b61156 7925100d .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-gce-arm64 KASAN: wild-memory-access Read in read_block_bitmap
2024/04/03 07:17 git://git.kernel.org/pub/scm/linux/kernel/git/arm64/linux.git for-kernelci 707081b61156 7925100d .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-gce-arm64 KASAN: wild-memory-access Read in read_block_bitmap
2024/03/27 19:10 git://git.kernel.org/pub/scm/linux/kernel/git/arm64/linux.git for-kernelci 707081b61156 454571b6 .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-gce-arm64 KASAN: wild-memory-access Read in read_block_bitmap
2024/03/27 19:06 git://git.kernel.org/pub/scm/linux/kernel/git/arm64/linux.git for-kernelci 707081b61156 454571b6 .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-gce-arm64 KASAN: wild-memory-access Read in read_block_bitmap
2024/03/27 19:06 git://git.kernel.org/pub/scm/linux/kernel/git/arm64/linux.git for-kernelci 707081b61156 454571b6 .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-gce-arm64 KASAN: wild-memory-access Read in read_block_bitmap
2024/03/27 19:06 git://git.kernel.org/pub/scm/linux/kernel/git/arm64/linux.git for-kernelci 707081b61156 454571b6 .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-gce-arm64 KASAN: wild-memory-access Read in read_block_bitmap
2024/03/27 19:05 git://git.kernel.org/pub/scm/linux/kernel/git/arm64/linux.git for-kernelci 707081b61156 454571b6 .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-gce-arm64 KASAN: wild-memory-access Read in read_block_bitmap
2024/03/27 19:05 git://git.kernel.org/pub/scm/linux/kernel/git/arm64/linux.git for-kernelci 707081b61156 454571b6 .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-gce-arm64 KASAN: wild-memory-access Read in read_block_bitmap
2024/03/27 19:05 git://git.kernel.org/pub/scm/linux/kernel/git/arm64/linux.git for-kernelci 707081b61156 454571b6 .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-gce-arm64 KASAN: wild-memory-access Read in read_block_bitmap
2024/03/27 19:03 git://git.kernel.org/pub/scm/linux/kernel/git/arm64/linux.git for-kernelci 707081b61156 454571b6 .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-gce-arm64 KASAN: wild-memory-access Read in read_block_bitmap
2024/03/27 19:03 git://git.kernel.org/pub/scm/linux/kernel/git/arm64/linux.git for-kernelci 707081b61156 454571b6 .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-gce-arm64 KASAN: wild-memory-access Read in read_block_bitmap
2024/03/27 19:03 git://git.kernel.org/pub/scm/linux/kernel/git/arm64/linux.git for-kernelci 707081b61156 454571b6 .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-gce-arm64 KASAN: wild-memory-access Read in read_block_bitmap
2024/03/27 19:00 git://git.kernel.org/pub/scm/linux/kernel/git/arm64/linux.git for-kernelci 707081b61156 454571b6 .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-gce-arm64 KASAN: wild-memory-access Read in read_block_bitmap
2024/03/27 19:00 git://git.kernel.org/pub/scm/linux/kernel/git/arm64/linux.git for-kernelci 707081b61156 454571b6 .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-gce-arm64 KASAN: wild-memory-access Read in read_block_bitmap
2024/03/27 18:56 git://git.kernel.org/pub/scm/linux/kernel/git/arm64/linux.git for-kernelci 707081b61156 454571b6 .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-gce-arm64 KASAN: wild-memory-access Read in read_block_bitmap
2024/03/27 18:56 git://git.kernel.org/pub/scm/linux/kernel/git/arm64/linux.git for-kernelci 707081b61156 454571b6 .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-gce-arm64 KASAN: wild-memory-access Read in read_block_bitmap
2024/03/27 18:53 git://git.kernel.org/pub/scm/linux/kernel/git/arm64/linux.git for-kernelci 707081b61156 454571b6 .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-gce-arm64 KASAN: wild-memory-access Read in read_block_bitmap
2024/03/27 18:45 git://git.kernel.org/pub/scm/linux/kernel/git/arm64/linux.git for-kernelci 707081b61156 454571b6 .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-gce-arm64 KASAN: wild-memory-access Read in read_block_bitmap
2024/03/27 18:42 git://git.kernel.org/pub/scm/linux/kernel/git/arm64/linux.git for-kernelci 707081b61156 454571b6 .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-gce-arm64 KASAN: wild-memory-access Read in read_block_bitmap
2024/03/27 18:41 git://git.kernel.org/pub/scm/linux/kernel/git/arm64/linux.git for-kernelci 707081b61156 454571b6 .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-gce-arm64 KASAN: wild-memory-access Read in read_block_bitmap
2023/10/17 13:40 git://git.kernel.org/pub/scm/linux/kernel/git/arm64/linux.git for-kernelci c295ba49917a 342b9c55 .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-gce-arm64 KASAN: wild-memory-access Read in read_block_bitmap
2023/10/17 07:03 git://git.kernel.org/pub/scm/linux/kernel/git/arm64/linux.git for-kernelci c295ba49917a 342b9c55 .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-gce-arm64 KASAN: wild-memory-access Read in read_block_bitmap
2023/10/16 17:20 git://git.kernel.org/pub/scm/linux/kernel/git/arm64/linux.git for-kernelci c295ba49917a 6388bc36 .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-gce-arm64 KASAN: wild-memory-access Read in read_block_bitmap
2023/10/13 21:42 git://git.kernel.org/pub/scm/linux/kernel/git/arm64/linux.git for-kernelci 249eb8f39efb 6388bc36 .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-gce-arm64 KASAN: wild-memory-access Read in read_block_bitmap
2023/10/08 02:21 git://git.kernel.org/pub/scm/linux/kernel/git/arm64/linux.git for-kernelci 19af4a4ed414 5e837c76 .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-gce-arm64 KASAN: wild-memory-access Read in read_block_bitmap
2024/04/03 07:30 upstream b1e6ec0a0fd0 7925100d .config console log report info [disk image (non-bootable)] [vmlinux] [kernel image] ci-qemu2-arm64-mte KASAN: invalid-access Read in read_block_bitmap
* Struck through repros no longer work on HEAD.