loop4: detected capacity change from 0 to 164 ================================================================== BUG: KCSAN: data-race in __find_get_block / has_bh_in_lru read-write to 0xffff888237d26b30 of 8 bytes by task 4340 on cpu 1: bh_lru_install fs/buffer.c:1337 [inline] __find_get_block+0x430/0x8a0 fs/buffer.c:1400 bdev_getblk+0x30/0x3b0 fs/buffer.c:1425 __bread_gfp+0x52/0x280 fs/buffer.c:1485 sb_bread include/linux/buffer_head.h:345 [inline] fat__get_entry fs/fat/dir.c:100 [inline] fat_get_entry+0x486/0x5f0 fs/fat/dir.c:128 fat_get_short_entry fs/fat/dir.c:885 [inline] fat_scan+0x110/0x210 fs/fat/dir.c:970 vfat_find_form fs/fat/namei_vfat.c:236 [inline] vfat_create_shortname fs/fat/namei_vfat.c:484 [inline] vfat_build_slots fs/fat/namei_vfat.c:608 [inline] vfat_add_entry+0x14f4/0x1c20 fs/fat/namei_vfat.c:669 vfat_create+0xab/0x190 fs/fat/namei_vfat.c:768 lookup_open fs/namei.c:3666 [inline] open_last_lookups fs/namei.c:3765 [inline] path_openat+0xec8/0x2000 fs/namei.c:4001 do_filp_open+0x115/0x240 fs/namei.c:4031 do_sys_openat2+0xaa/0x110 fs/open.c:1429 do_sys_open fs/open.c:1444 [inline] __do_sys_openat fs/open.c:1460 [inline] __se_sys_openat fs/open.c:1455 [inline] __x64_sys_openat+0xf8/0x120 fs/open.c:1455 x64_sys_call+0x1ac/0x2e10 arch/x86/include/generated/asm/syscalls_64.h:258 do_syscall_x64 arch/x86/entry/syscall_64.c:63 [inline] do_syscall_64+0xc9/0x1c0 arch/x86/entry/syscall_64.c:94 entry_SYSCALL_64_after_hwframe+0x77/0x7f read to 0xffff888237d26b30 of 8 bytes by task 4347 on cpu 0: has_bh_in_lru+0x35/0x1f0 fs/buffer.c:1521 smp_call_function_many_cond+0x30a/0xbc0 kernel/smp.c:838 on_each_cpu_cond_mask+0x3c/0x90 kernel/smp.c:1052 on_each_cpu_cond include/linux/smp.h:105 [inline] invalidate_bh_lrus+0x2a/0x30 fs/buffer.c:1530 kill_bdev block/bdev.c:90 [inline] set_blocksize+0x24f/0x270 block/bdev.c:175 sb_set_blocksize+0x7e/0x100 block/bdev.c:186 isofs_fill_super+0xa18/0x12c0 fs/isofs/inode.c:816 get_tree_bdev_flags+0x2b4/0x330 fs/super.c:1636 get_tree_bdev+0x1f/0x30 fs/super.c:1659 isofs_get_tree+0x1c/0x30 fs/isofs/inode.c:1523 vfs_get_tree+0x56/0x1e0 fs/super.c:1759 do_new_mount+0x246/0x6b0 fs/namespace.c:3879 path_mount+0x49b/0xb30 fs/namespace.c:4206 do_mount fs/namespace.c:4219 [inline] __do_sys_mount fs/namespace.c:4430 [inline] __se_sys_mount+0x28f/0x2e0 fs/namespace.c:4407 __x64_sys_mount+0x67/0x80 fs/namespace.c:4407 x64_sys_call+0xd11/0x2e10 arch/x86/include/generated/asm/syscalls_64.h:166 do_syscall_x64 arch/x86/entry/syscall_64.c:63 [inline] do_syscall_64+0xc9/0x1c0 arch/x86/entry/syscall_64.c:94 entry_SYSCALL_64_after_hwframe+0x77/0x7f value changed: 0xffff8881060c2548 -> 0xffff8881062cdea0 Reported by Kernel Concurrency Sanitizer on: CPU: 0 UID: 0 PID: 4347 Comm: syz.4.298 Not tainted 6.15.0-rc1-syzkaller #0 PREEMPT(voluntary) Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 02/12/2025 ================================================================== Unable to read rock-ridge attributes Unable to read rock-ridge attributes iso9660: Corrupted directory entry in block 4 of inode 1792 syz.4.298: attempt to access beyond end of device loop0: rw=2048, sector=0, nr_sectors = 8 limit=0 Unable to read rock-ridge attributes