================================================================== BUG: KCSAN: data-race in delete_from_page_cache_batch / page_mapping write to 0xffffea0004a31658 of 8 bytes by task 8432 on cpu 0: 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 ext4_fill_super+0x3a5/0x7830 fs/ext4/super.c:3924 mount_bdev+0x1e8/0x290 fs/super.c:1368 ext4_mount+0x2d/0x40 fs/ext4/super.c:6515 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 0xffffea0004a31658 of 8 bytes by task 8228 on cpu 1: 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_add_drain_cpu+0x6a/0x270 mm/swap.c:597 lru_add_drain mm/swap.c:701 [inline] __pagevec_release+0x57/0xa0 mm/swap.c:980 pagevec_release include/linux/pagevec.h:81 [inline] mpage_prepare_extent_to_map+0x5f5/0x650 fs/ext4/inode.c:2636 ext4_writepages+0x706/0x1d70 fs/ext4/inode.c:2752 do_writepages+0x26b/0x3c0 mm/page-writeback.c:2364 filemap_fdatawrite_wbc mm/filemap.c:400 [inline] __filemap_fdatawrite_range mm/filemap.c:433 [inline] file_write_and_wait_range+0x1ae/0x240 mm/filemap.c:810 ext4_sync_file+0x105/0x670 fs/ext4/fsync.c:151 vfs_fsync_range+0x107/0x120 fs/sync.c:200 generic_write_sync include/linux/fs.h:2955 [inline] ext4_buffered_write_iter+0x3af/0x400 fs/ext4/file.c:277 ext4_file_write_iter+0x2e7/0x11f0 call_write_iter include/linux/fs.h:2163 [inline] do_iter_readv_writev+0x2de/0x380 fs/read_write.c:729 do_iter_write+0x192/0x5c0 fs/read_write.c:855 vfs_iter_write+0x4c/0x70 fs/read_write.c:896 iter_file_splice_write+0x43a/0x790 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+0x106/0x190 fs/splice.c:979 do_sendfile+0x63e/0xbb0 fs/read_write.c:1249 __do_sys_sendfile64 fs/read_write.c:1314 [inline] __se_sys_sendfile64 fs/read_write.c:1300 [inline] __x64_sys_sendfile64+0x102/0x140 fs/read_write.c:1300 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: 0xffff888101098ba8 -> 0x0000000000000000 Reported by Kernel Concurrency Sanitizer on: CPU: 1 PID: 8228 Comm: syz-executor.1 Not tainted 5.15.0-rc7-syzkaller #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 ==================================================================