================================================================== BUG: KCSAN: data-race in delete_from_page_cache_batch / page_mapping write to 0xffffea00046ec358 of 8 bytes by task 12191 on cpu 1: page_cache_delete_batch mm/filemap.c:319 [inline] delete_from_page_cache_batch+0x30c/0x6c0 mm/filemap.c:349 truncate_inode_pages_range+0x1d5/0xad0 mm/truncate.c:326 truncate_inode_pages+0x20/0x30 mm/truncate.c:425 kill_bdev block/bdev.c:77 [inline] set_blocksize+0x24e/0x270 block/bdev.c:157 sb_set_blocksize block/bdev.c:166 [inline] sb_min_blocksize+0x9d/0x120 block/bdev.c:182 fat_fill_super+0xe95/0x2b10 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:2988 [inline] path_mount+0x11ec/0x1d20 fs/namespace.c:3318 do_mount fs/namespace.c:3331 [inline] __do_sys_mount fs/namespace.c:3539 [inline] __se_sys_mount+0x24b/0x2f0 fs/namespace.c:3516 __x64_sys_mount+0x63/0x70 fs/namespace.c:3516 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 read to 0xffffea00046ec358 of 8 bytes by task 1136 on cpu 0: page_mapping+0x111/0x1c0 mm/util.c:725 page_evictable mm/internal.h:83 [inline] __pagevec_lru_add_fn+0x82/0x490 mm/swap.c:1024 __pagevec_lru_add+0x189/0x240 mm/swap.c:1052 lru_cache_add+0x121/0x150 mm/swap.c:453 shmem_getpage_gfp+0xcb9/0x13d0 mm/shmem.c:1940 shmem_getpage mm/shmem.c:151 [inline] shmem_file_read_iter+0x1b2/0x5d0 mm/shmem.c:2546 call_read_iter include/linux/fs.h:2157 [inline] do_iter_readv_writev+0x2fb/0x380 fs/read_write.c:727 do_iter_read+0x192/0x5d0 fs/read_write.c:790 vfs_iter_read+0x4c/0x70 fs/read_write.c:832 lo_read_simple drivers/block/loop.c:404 [inline] do_req_filebacked drivers/block/loop.c:675 [inline] loop_handle_cmd drivers/block/loop.c:2201 [inline] loop_process_work+0x11ae/0x18f0 drivers/block/loop.c:2241 loop_rootcg_workfn+0x1b/0x20 drivers/block/loop.c:2272 process_one_work+0x402/0x910 kernel/workqueue.c:2297 worker_thread+0x636/0xae0 kernel/workqueue.c:2444 kthread+0x262/0x280 kernel/kthread.c:319 ret_from_fork+0x1f/0x30 value changed: 0xffff888101079568 -> 0x0000000000000000 Reported by Kernel Concurrency Sanitizer on: CPU: 0 PID: 1136 Comm: kworker/u4:6 Not tainted 5.15.0-rc3-syzkaller #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 Workqueue: loop1 loop_rootcg_workfn ==================================================================