syzbot

loop1: detected capacity change from 0 to 512
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BUG: KCSAN: data-race in __find_get_block / has_bh_in_lru

write to 0xffff888237c283f8 of 8 bytes by task 10703 on cpu 0:
 bh_lru_install fs/buffer.c:1250 [inline]
 __find_get_block+0x22c/0x6c0 fs/buffer.c:1309
 __getblk_slow fs/buffer.c:1034 [inline]
 __getblk_gfp+0xde/0x1c0 fs/buffer.c:1333
 sb_getblk_gfp include/linux/buffer_head.h:333 [inline]
 __ext4_sb_bread_gfp fs/ext4/super.c:236 [inline]
 ext4_sb_bread_unmovable+0x3b/0x1a0 fs/ext4/super.c:259
 __ext4_fill_super fs/ext4/super.c:4343 [inline]
 ext4_fill_super+0x416/0x4f10 fs/ext4/super.c:5499
 get_tree_bdev+0x2b4/0x3b0 fs/super.c:1292
 ext4_get_tree+0x18/0x20 fs/ext4/super.c:5529
 vfs_get_tree+0x49/0x190 fs/super.c:1497
 do_new_mount+0x200/0x650 fs/namespace.c:3040
 path_mount+0x4b1/0xb60 fs/namespace.c:3370
 do_mount fs/namespace.c:3383 [inline]
 __do_sys_mount fs/namespace.c:3591 [inline]
 __se_sys_mount+0x281/0x2d0 fs/namespace.c:3568
 __x64_sys_mount+0x63/0x70 fs/namespace.c:3568
 do_syscall_x64 arch/x86/entry/common.c:50 [inline]
 do_syscall_64+0x2b/0x70 arch/x86/entry/common.c:80
 entry_SYSCALL_64_after_hwframe+0x46/0xb0

read to 0xffff888237c283f8 of 8 bytes by task 10701 on cpu 1:
 has_bh_in_lru+0x31/0x1c0 fs/buffer.c:1414
 smp_call_function_many_cond+0x2a9/0x6d0 kernel/smp.c:936
 on_each_cpu_cond_mask+0x3b/0x80 kernel/smp.c:1154
 on_each_cpu_cond include/linux/smp.h:105 [inline]
 invalidate_bh_lrus+0x26/0x30 fs/buffer.c:1423
 kill_bdev block/bdev.c:76 [inline]
 set_blocksize+0x242/0x270 block/bdev.c:153
 sb_set_blocksize+0x2c/0xa0 block/bdev.c:162
 __ext4_fill_super fs/ext4/super.c:4735 [inline]
 ext4_fill_super+0x21d2/0x4f10 fs/ext4/super.c:5499
 get_tree_bdev+0x2b4/0x3b0 fs/super.c:1292
 ext4_get_tree+0x18/0x20 fs/ext4/super.c:5529
 vfs_get_tree+0x49/0x190 fs/super.c:1497
 do_new_mount+0x200/0x650 fs/namespace.c:3040
 path_mount+0x4b1/0xb60 fs/namespace.c:3370
 do_mount fs/namespace.c:3383 [inline]
 __do_sys_mount fs/namespace.c:3591 [inline]
 __se_sys_mount+0x281/0x2d0 fs/namespace.c:3568
 __x64_sys_mount+0x63/0x70 fs/namespace.c:3568
 do_syscall_x64 arch/x86/entry/common.c:50 [inline]
 do_syscall_64+0x2b/0x70 arch/x86/entry/common.c:80
 entry_SYSCALL_64_after_hwframe+0x46/0xb0

value changed: 0xffff888106749548 -> 0xffff88813c0055b0

Reported by Kernel Concurrency Sanitizer on:
CPU: 1 PID: 10701 Comm: syz-executor.1 Not tainted 5.18.0-syzkaller-09061-g16477cdfefdb-dirty #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
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EXT4-fs (loop1): inodes count not valid: 262176 vs 32