================================================================== BUG: KCSAN: data-race in delete_from_page_cache_batch / folio_mapping write to 0xffffea0004d4f0d8 of 8 bytes by task 22386 on cpu 1: page_cache_delete_batch mm/filemap.c:315 [inline] delete_from_page_cache_batch+0x301/0x760 mm/filemap.c:341 truncate_inode_pages_range+0x305/0x8b0 mm/truncate.c:381 truncate_inode_pages+0x20/0x30 mm/truncate.c:466 kill_bdev block/bdev.c:78 [inline] set_blocksize+0x24e/0x270 block/bdev.c:158 sb_set_blocksize+0x2c/0xa0 block/bdev.c:167 __ext4_fill_super+0x1b64/0x59b0 fs/ext4/super.c:4793 ext4_fill_super+0xfd/0x2f0 fs/ext4/super.c:5558 get_tree_bdev+0x2c2/0x3d0 fs/super.c:1295 vfs_get_tree+0x4a/0x1a0 fs/super.c:1500 do_new_mount fs/namespace.c:2994 [inline] path_mount+0x11cf/0x1c40 fs/namespace.c:3324 do_mount fs/namespace.c:3337 [inline] __do_sys_mount fs/namespace.c:3545 [inline] __se_sys_mount+0x24b/0x2f0 fs/namespace.c:3522 __x64_sys_mount+0x63/0x70 fs/namespace.c:3522 do_syscall_x64 arch/x86/entry/common.c:50 [inline] do_syscall_64+0x44/0xd0 arch/x86/entry/common.c:80 entry_SYSCALL_64_after_hwframe+0x44/0xae read to 0xffffea0004d4f0d8 of 8 bytes by task 3467 on cpu 0: folio_mapping+0x92/0x120 mm/util.c:715 folio_evictable mm/internal.h:121 [inline] __pagevec_lru_add_fn+0x81/0x380 mm/swap.c:1043 __pagevec_lru_add+0x1c3/0x270 mm/swap.c:1071 folio_add_lru+0x11a/0x160 mm/swap.c:469 filemap_add_folio+0xf8/0x150 mm/filemap.c:976 page_cache_ra_unbounded+0x274/0x400 mm/readahead.c:221 do_page_cache_ra mm/readahead.c:268 [inline] force_page_cache_ra+0x1e6/0x220 mm/readahead.c:300 page_cache_sync_ra+0xcc/0xe0 mm/readahead.c:574 page_cache_sync_readahead include/linux/pagemap.h:1056 [inline] filemap_get_pages mm/filemap.c:2511 [inline] filemap_read+0x3ed/0x1430 mm/filemap.c:2598 blkdev_read_iter+0xcb/0x350 block/fops.c:610 call_read_iter include/linux/fs.h:2080 [inline] new_sync_read fs/read_write.c:400 [inline] vfs_read+0x66c/0x750 fs/read_write.c:481 ksys_read+0xd9/0x190 fs/read_write.c:619 __do_sys_read fs/read_write.c:629 [inline] __se_sys_read fs/read_write.c:627 [inline] __x64_sys_read+0x3e/0x50 fs/read_write.c:627 do_syscall_x64 arch/x86/entry/common.c:50 [inline] do_syscall_64+0x44/0xd0 arch/x86/entry/common.c:80 entry_SYSCALL_64_after_hwframe+0x44/0xae value changed: 0xffff888101374bb0 -> 0x0000000000000000 Reported by Kernel Concurrency Sanitizer on: CPU: 0 PID: 3467 Comm: udevd Not tainted 5.16.0-syzkaller #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 ================================================================== I/O error, dev loop3, sector 3968 op 0x0:(READ) flags 0x80700 phys_seg 1 prio class 0 I/O error, dev loop3, sector 3968 op 0x0:(READ) flags 0x0 phys_seg 1 prio class 0 Buffer I/O error on dev loop3, logical block 496, async page read I/O error, dev loop3, sector 3968 op 0x0:(READ) flags 0x80700 phys_seg 1 prio class 0 Buffer I/O error on dev loop3, logical block 0, async page read Buffer I/O error on dev loop3, logical block 496, async page read Buffer I/O error on dev loop3, logical block 496, async page read blk_print_req_error: 14 callbacks suppressed I/O error, dev loop3, sector 264064 op 0x0:(READ) flags 0x80700 phys_seg 1 prio class 0 I/O error, dev loop3, sector 3968 op 0x0:(READ) flags 0x80700 phys_seg 1 prio class 0 I/O error, dev loop3, sector 3968 op 0x0:(READ) flags 0x80700 phys_seg 1 prio class 0 I/O error, dev loop3, sector 3968 op 0x0:(READ) flags 0x80700 phys_seg 1 prio class 0 I/O error, dev loop3, sector 3968 op 0x0:(READ) flags 0x80700 phys_seg 1 prio class 0 I/O error, dev loop3, sector 3968 op 0x0:(READ) flags 0x80700 phys_seg 1 prio class 0 I/O error, dev loop3, sector 3968 op 0x0:(READ) flags 0x80700 phys_seg 1 prio class 0 blk_print_req_error: 1 callbacks suppressed I/O error, dev loop3, sector 3968 op 0x0:(READ) flags 0x80700 phys_seg 1 prio class 0