loop5: detected capacity change from 0 to 1024 EXT4-fs (loop5): Invalid log block size: 10551296 ================================================================== BUG: KCSAN: data-race in __lru_add_drain_all / lru_cache_add_inactive_or_unevictable write to 0xffff888237c22528 of 1 bytes by task 11098 on cpu 0: pagevec_add include/linux/pagevec.h:74 [inline] pagevec_add_and_need_flush mm/swap.c:222 [inline] lru_cache_add mm/swap.c:452 [inline] lru_cache_add_inactive_or_unevictable+0xaa/0x270 mm/swap.c:484 do_anonymous_page+0x716/0x8b0 mm/memory.c:3808 handle_pte_fault mm/memory.c:4557 [inline] __handle_mm_fault mm/memory.c:4694 [inline] handle_mm_fault+0x7f5/0x1580 mm/memory.c:4792 faultin_page mm/gup.c:937 [inline] __get_user_pages+0x381/0xc50 mm/gup.c:1158 __get_user_pages_locked mm/gup.c:1343 [inline] __get_user_pages_remote+0x17f/0x610 mm/gup.c:1852 get_user_pages_remote+0x6f/0xa0 mm/gup.c:1925 get_arg_page fs/exec.c:221 [inline] copy_string_kernel+0x1a3/0x420 fs/exec.c:633 kernel_execve+0x397/0x640 fs/exec.c:1965 call_usermodehelper_exec_async+0x1d8/0x290 kernel/umh.c:112 ret_from_fork+0x1f/0x30 read to 0xffff888237c22528 of 1 bytes by task 11085 on cpu 1: pagevec_count include/linux/pagevec.h:61 [inline] __lru_add_drain_all+0x12c/0x3e0 mm/swap.c:806 lru_add_drain_all+0xc/0x10 mm/swap.c:828 invalidate_bdev+0x56/0x80 block/bdev.c:87 __loop_clr_fd+0x521/0x850 drivers/block/loop.c:1399 loop_clr_fd drivers/block/loop.c:1494 [inline] lo_ioctl+0xac5/0x13e0 drivers/block/loop.c:1850 blkdev_ioctl+0x1d0/0x3f0 block/ioctl.c:589 block_ioctl+0x6e/0x80 block/fops.c:477 vfs_ioctl fs/ioctl.c:51 [inline] __do_sys_ioctl fs/ioctl.c:874 [inline] __se_sys_ioctl+0xcb/0x140 fs/ioctl.c:860 __x64_sys_ioctl+0x3f/0x50 fs/ioctl.c:860 do_syscall_x64 arch/x86/entry/common.c:50 [inline] do_syscall_64+0x44/0xa0 arch/x86/entry/common.c:80 entry_SYSCALL_64_after_hwframe+0x44/0xae value changed: 0x00 -> 0x01 Reported by Kernel Concurrency Sanitizer on: CPU: 1 PID: 11085 Comm: syz-executor.5 Not tainted 5.15.0-rc2-syzkaller #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 ================================================================== loop5: detected capacity change from 0 to 1024 EXT4-fs (loop5): Invalid log block size: 10551296