loop0: detected capacity change from 0 to 262160 ================================================================== BUG: KCSAN: data-race in has_bh_in_lru / invalidate_bh_lrus_cpu write to 0xffff888237c42f10 of 8 bytes by task 10650 on cpu 0: __invalidate_bh_lrus fs/buffer.c:1393 [inline] invalidate_bh_lrus_cpu+0xad/0xe0 fs/buffer.c:1434 lru_add_drain_cpu+0x243/0x270 mm/swap.c:645 lru_add_drain mm/swap.c:724 [inline] __pagevec_release+0x57/0xa0 mm/swap.c:989 pagevec_release include/linux/pagevec.h:81 [inline] write_cache_pages+0x6b7/0x810 mm/page-writeback.c:2288 mpage_writepages+0x6d/0x120 fs/mpage.c:712 fat_writepages+0x20/0x30 fs/fat/inode.c:205 do_writepages+0x7b/0x150 mm/page-writeback.c:2355 __filemap_fdatawrite_range mm/filemap.c:413 [inline] file_write_and_wait_range+0x180/0x210 mm/filemap.c:792 __generic_file_fsync+0x48/0x140 fs/libfs.c:1088 fat_file_fsync+0x48/0x100 fs/fat/file.c:190 vfs_fsync_range+0x107/0x120 fs/sync.c:200 generic_write_sync include/linux/fs.h:2987 [inline] generic_file_write_iter+0x103/0x130 mm/filemap.c:3819 call_write_iter include/linux/fs.h:2114 [inline] do_iter_readv_writev+0x2cb/0x360 fs/read_write.c:740 do_iter_write+0x112/0x4c0 fs/read_write.c:866 vfs_iter_write+0x4c/0x70 fs/read_write.c:907 iter_file_splice_write+0x40a/0x750 fs/splice.c:689 do_splice_from fs/splice.c:767 [inline] direct_splice_actor+0x80/0xa0 fs/splice.c:936 splice_direct_to_actor+0x345/0x650 fs/splice.c:891 do_splice_direct+0xf5/0x170 fs/splice.c:979 do_sendfile+0x773/0xda0 fs/read_write.c:1260 __do_sys_sendfile64 fs/read_write.c:1319 [inline] __se_sys_sendfile64 fs/read_write.c:1311 [inline] __x64_sys_sendfile64+0xa9/0x130 fs/read_write.c:1311 do_syscall_x64 arch/x86/entry/common.c:50 [inline] do_syscall_64+0x3d/0x90 arch/x86/entry/common.c:80 entry_SYSCALL_64_after_hwframe+0x44/0xae read to 0xffff888237c42f10 of 8 bytes by task 10646 on cpu 1: has_bh_in_lru+0x31/0x1c0 fs/buffer.c:1415 smp_call_function_many_cond+0x226/0x620 kernel/smp.c:915 on_each_cpu_cond_mask+0x31/0x40 kernel/smp.c:1133 on_each_cpu_cond include/linux/smp.h:105 [inline] invalidate_bh_lrus+0x26/0x30 fs/buffer.c:1424 kill_bdev fs/block_dev.c:85 [inline] set_blocksize+0x242/0x270 fs/block_dev.c:166 sb_set_blocksize fs/block_dev.c:175 [inline] sb_min_blocksize+0x9d/0x120 fs/block_dev.c:191 fat_fill_super+0xe40/0x2a80 fs/fat/inode.c:1649 vfat_fill_super+0x2c/0x40 fs/fat/namei_vfat.c:1051 mount_bdev+0x1e8/0x290 fs/super.c:1368 vfat_mount+0x2d/0x40 fs/fat/namei_vfat.c:1058 legacy_get_tree+0x70/0xc0 fs/fs_context.c:610 vfs_get_tree+0x4a/0x1a0 fs/super.c:1498 do_new_mount fs/namespace.c:2919 [inline] path_mount+0x11d4/0x1ce0 fs/namespace.c:3249 do_mount fs/namespace.c:3262 [inline] __do_sys_mount fs/namespace.c:3470 [inline] __se_sys_mount+0x23d/0x2e0 fs/namespace.c:3447 __x64_sys_mount+0x63/0x70 fs/namespace.c:3447 do_syscall_x64 arch/x86/entry/common.c:50 [inline] do_syscall_64+0x3d/0x90 arch/x86/entry/common.c:80 entry_SYSCALL_64_after_hwframe+0x44/0xae value changed: 0xffff888106a7f820 -> 0x0000000000000000 Reported by Kernel Concurrency Sanitizer on: CPU: 1 PID: 10646 Comm: syz-executor.0 Not tainted 5.14.0-rc5-syzkaller #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 ==================================================================