================================================================== BUG: KASAN: use-after-free in arch_test_bit include/asm-generic/bitops/non-atomic.h:118 [inline] BUG: KASAN: use-after-free in test_bit_le include/asm-generic/bitops/le.h:85 [inline] BUG: KASAN: use-after-free in ext2_valid_block_bitmap+0x10c/0x2e0 fs/ext2/balloc.c:88 Read of size 8 at addr ffff0000fd414ff8 by task syz-executor372/3977 CPU: 1 PID: 3977 Comm: syz-executor372 Not tainted 5.15.135-syzkaller #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 09/06/2023 Call trace: dump_backtrace+0x0/0x530 arch/arm64/kernel/stacktrace.c:152 show_stack+0x2c/0x3c arch/arm64/kernel/stacktrace.c:216 __dump_stack lib/dump_stack.c:88 [inline] dump_stack_lvl+0x108/0x170 lib/dump_stack.c:106 print_address_description+0x7c/0x3f0 mm/kasan/report.c:248 __kasan_report mm/kasan/report.c:434 [inline] kasan_report+0x174/0x1e4 mm/kasan/report.c:451 __asan_report_load8_noabort+0x44/0x50 mm/kasan/report_generic.c:309 arch_test_bit include/asm-generic/bitops/non-atomic.h:118 [inline] test_bit_le include/asm-generic/bitops/le.h:85 [inline] ext2_valid_block_bitmap+0x10c/0x2e0 fs/ext2/balloc.c:88 read_block_bitmap+0x294/0x340 fs/ext2/balloc.c:154 ext2_free_blocks+0x280/0xa38 fs/ext2/balloc.c:515 ext2_free_data fs/ext2/inode.c:1121 [inline] ext2_free_branches+0x2f4/0x3c4 fs/ext2/inode.c:1178 ext2_free_branches+0x180/0x3c4 fs/ext2/inode.c:1169 ext2_free_branches+0x180/0x3c4 fs/ext2/inode.c:1169 __ext2_truncate_blocks+0x9a8/0xd00 fs/ext2/inode.c:1252 ext2_setsize fs/ext2/inode.c:1314 [inline] ext2_setattr+0x658/0x904 fs/ext2/inode.c:1692 notify_change+0xa34/0xcf8 fs/attr.c:505 do_truncate+0x1c0/0x28c fs/open.c:65 handle_truncate fs/namei.c:3195 [inline] do_open fs/namei.c:3542 [inline] path_openat+0x20e8/0x26f0 fs/namei.c:3672 do_filp_open+0x1a8/0x3b4 fs/namei.c:3699 do_sys_openat2+0x128/0x3d8 fs/open.c:1211 do_sys_open fs/open.c:1227 [inline] __do_sys_openat fs/open.c:1243 [inline] __se_sys_openat fs/open.c:1238 [inline] __arm64_sys_openat+0x1f0/0x240 fs/open.c:1238 __invoke_syscall arch/arm64/kernel/syscall.c:38 [inline] invoke_syscall+0x98/0x2b8 arch/arm64/kernel/syscall.c:52 el0_svc_common+0x138/0x258 arch/arm64/kernel/syscall.c:142 do_el0_svc+0x58/0x14c arch/arm64/kernel/syscall.c:181 el0_svc+0x7c/0x1f0 arch/arm64/kernel/entry-common.c:596 el0t_64_sync_handler+0x84/0xe4 arch/arm64/kernel/entry-common.c:614 el0t_64_sync+0x1a0/0x1a4 arch/arm64/kernel/entry.S:584 The buggy address belongs to the page: page:000000005c4593eb refcount:0 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x13d414 flags: 0x5ffc00000000000(node=0|zone=2|lastcpupid=0x7ff) raw: 05ffc00000000000 fffffc0003f50508 fffffc0003f50508 0000000000000000 raw: 0000000000000000 0000000000000000 00000000ffffffff 0000000000000000 page dumped because: kasan: bad access detected Memory state around the buggy address: ffff0000fd414e80: ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ffff0000fd414f00: ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff >ffff0000fd414f80: ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ^ ffff0000fd415000: ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ffff0000fd415080: ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ================================================================== 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 = 3 EXT2-fs (loop0): error: ext2_free_blocks: Freeing blocks not in datazone - block = 983269, count = 1 EXT2-fs (loop0): error: ext2_free_blocks: Freeing blocks not in datazone - block = 589827, count = 1 EXT2-fs (loop0): error: ext2_free_blocks: Freeing blocks not in datazone - block = 2185560079, count = 1 EXT2-fs (loop0): error: ext2_free_blocks: Freeing blocks not in datazone - block = 18346, count = 1 EXT2-fs (loop0): error: ext2_free_blocks: Freeing blocks in system zones - Block = 2, count = 1 EXT2-fs (loop0): error: ext2_free_blocks: Freeing blocks not in datazone - block = 33261, count = 1 EXT2-fs (loop0): error: ext2_free_blocks: bit already cleared for block 100 EXT2-fs (loop0): error: ext2_free_blocks: Freeing blocks not in datazone - block = 1669132791, count = 1 EXT2-fs (loop0): error: ext2_free_blocks: Freeing blocks not in datazone - block = 1669132791, count = 1 EXT2-fs (loop0): error: ext2_free_blocks: bit already cleared for block 64 EXT2-fs (loop0): error: ext2_free_blocks: Freeing blocks not in datazone - block = 65536, count = 1 EXT2-fs (loop0): error: ext2_free_blocks: Freeing blocks not in datazone - block = 268435456, count = 1 EXT2-fs (loop0): error: ext2_free_blocks: Freeing blocks not in datazone - block = 1, count = 1 EXT2-fs (loop0): error: ext2_free_blocks: Freeing blocks not in datazone - block = 1803188595, count = 1 EXT2-fs (loop0): error: ext2_free_blocks: Freeing blocks not in datazone - block = 1701604449, count = 1 EXT2-fs (loop0): error: ext2_free_blocks: Freeing blocks not in datazone - block = 2054779762, count = 1 EXT2-fs (loop0): error: ext2_free_blocks: Freeing blocks not in datazone - block = 1819042155, count = 1 EXT2-fs (loop0): error: ext2_free_blocks: Freeing blocks not in datazone - block = 7565925, count = 1 EXT2-fs (loop0): error: ext2_free_blocks: Freeing blocks not in datazone - block = 1937768448, count = 1 EXT2-fs (loop0): error: ext2_free_blocks: Freeing blocks not in datazone - block = 1634433657, count = 1 EXT2-fs (loop0): error: ext2_free_blocks: Freeing blocks not in datazone - block = 1919249516, count = 1 EXT2-fs (loop0): error: ext2_free_blocks: Freeing blocks not in datazone - block = 1803188595, count = 1 EXT2-fs (loop0): error: ext2_free_blocks: Freeing blocks not in datazone - block = 1701604449, count = 1 EXT2-fs (loop0): error: ext2_free_blocks: Freeing blocks not in datazone - block = 2054779762, count = 1 EXT2-fs (loop0): error: ext2_free_blocks: Freeing blocks not in datazone - block = 1819042155, count = 1 EXT2-fs (loop0): error: ext2_free_blocks: Freeing blocks not in datazone - block = 2037609061, count = 1 EXT2-fs (loop0): error: ext2_free_blocks: Freeing blocks not in datazone - block = 1818323834, count = 1 EXT2-fs (loop0): error: ext2_free_blocks: Freeing blocks not in datazone - block = 3133565699, count = 1 EXT2-fs (loop0): error: ext2_free_blocks: Freeing blocks not in datazone - block = 327680, count = 1 EXT2-fs (loop0): error: ext2_free_blocks: Freeing blocks not in datazone - block = 150994944, count = 1 EXT2-fs (loop0): error: ext2_free_blocks: Freeing blocks not in datazone - block = 2683928664, count = 1 EXT2-fs (loop0): error: ext2_free_blocks: Freeing blocks not in datazone - block = 2683928664, count = 1 EXT2-fs (loop0): error: ext2_free_blocks: Freeing blocks not in datazone - block = 2683928664, count = 1 EXT2-fs (loop0): error: ext2_free_blocks: Freeing blocks not in datazone - block = 1669132791, count = 1 EXT2-fs (loop0): error: ext2_free_blocks: Freeing blocks not in datazone - block = 2683928664, count = 1 EXT2-fs (loop0): error: ext2_free_blocks: Freeing blocks not in datazone - block = 3925999616, count = 1 EXT2-fs (loop0): error: ext2_free_blocks: Freeing blocks not in datazone - block = 3409668, count = 1 EXT2-fs (loop0): error: ext2_free_blocks: bit already cleared for block 40 EXT2-fs (loop0): error: ext2_free_blocks: Freeing blocks not in datazone - block = 1635017060, count = 1 EXT2-fs (loop0): error: ext2_free_blocks: Freeing blocks not in datazone - block = 1936876908, count = 1 EXT2-fs (loop0): error: ext2_free_blocks: Freeing blocks not in datazone - block = 1634433657, count = 1 EXT2-fs (loop0): error: ext2_free_blocks: Freeing blocks not in datazone - block = 1919249516, count = 1 EXT2-fs (loop0): error: ext2_free_blocks: Freeing blocks not in datazone - block = 1803188595, count = 1 EXT2-fs (loop0): error: ext2_free_blocks: Freeing blocks not in datazone - block = 1701604449, count = 1 EXT2-fs (loop0): error: ext2_free_blocks: Freeing blocks not in datazone - block = 2054779762, count = 1 EXT2-fs (loop0): error: ext2_free_blocks: Freeing blocks not in datazone - block = 1819042155, count = 1 EXT2-fs (loop0): error: ext2_free_blocks: Freeing blocks not in datazone - block = 2037609061, count = 1 EXT2-fs (loop0): error: ext2_free_blocks: Freeing blocks not in datazone - block = 1818323834, count = 1 EXT2-fs (loop0): error: ext2_free_blocks: Freeing blocks not in datazone - block = 1936876908, count = 1 EXT2-fs (loop0): error: ext2_free_blocks: bit already cleared for block 9 EXT2-fs (loop0): error: ext2_free_blocks: bit already cleared for block 13 EXT2-fs (loop0): error: ext2_free_blocks: bit already cleared for block 32 EXT2-fs (loop0): error: ext2_free_blocks: Freeing blocks not in datazone - block = 163928, count = 1 EXT2-fs (loop0): error: ext2_free_blocks: Freeing blocks not in datazone - block = 2683895808, count = 1 EXT2-fs (loop0): error: ext2_free_blocks: Freeing blocks not in datazone - block = 1669132790, count = 1 EXT2-fs (loop0): error: ext2_free_blocks: Freeing blocks not in datazone - block = 131072, count = 1 EXT2-fs (loop0): error: ext2_free_blocks: Freeing blocks in system zones - Block = 5, count = 1 EXT2-fs (loop0): error: ext2_free_blocks: Freeing blocks in system zones - Block = 5, count = 1 EXT2-fs (loop0): error: ext2_free_branches: Read failure, inode=16, block=16777216