xt_TCPMSS: Only works on TCP SYN packets
loop7: detected capacity change from 0 to 16384
==================================================================
BUG: KCSAN: data-race in __filemap_remove_folio / file_write_and_wait_range
read-write to 0xffff8881006311f0 of 8 bytes by task 5633 on cpu 1:
page_cache_delete mm/filemap.c:154 [inline]
__filemap_remove_folio+0x1c5/0x2c0 mm/filemap.c:232
__remove_mapping+0x33f/0x470 mm/vmscan.c:762
remove_mapping+0x22/0x90 mm/vmscan.c:795
mapping_evict_folio mm/truncate.c:293 [inline]
mapping_try_invalidate+0x288/0x3e0 mm/truncate.c:511
invalidate_mapping_pages+0x27/0x40 mm/truncate.c:549
invalidate_bdev+0x58/0x70 block/bdev.c:101
loop_set_block_size drivers/block/loop.c:1471 [inline]
lo_simple_ioctl drivers/block/loop.c:1497 [inline]
lo_ioctl+0xb44/0x11d0 drivers/block/loop.c:1560
blkdev_ioctl+0x35f/0x450 block/ioctl.c:676
vfs_ioctl fs/ioctl.c:51 [inline]
__do_sys_ioctl fs/ioctl.c:907 [inline]
__se_sys_ioctl+0xd3/0x150 fs/ioctl.c:893
__x64_sys_ioctl+0x43/0x50 fs/ioctl.c:893
x64_sys_call+0x1688/0x2e00 arch/x86/include/generated/asm/syscalls_64.h:17
do_syscall_x64 arch/x86/entry/common.c:52 [inline]
do_syscall_64+0xc9/0x1c0 arch/x86/entry/common.c:83
entry_SYSCALL_64_after_hwframe+0x77/0x7f
read to 0xffff8881006311f0 of 8 bytes by task 5628 on cpu 0:
mapping_needs_writeback mm/filemap.c:635 [inline]
file_write_and_wait_range+0x6d/0x170 mm/filemap.c:787
blkdev_fsync+0x4e/0xa0 block/fops.c:554
vfs_fsync_range+0x122/0x140 fs/sync.c:188
generic_write_sync+0xf2/0x130 include/linux/fs.h:2816
blkdev_write_iter+0x379/0x3c0 block/fops.c:722
iter_file_splice_write+0x5e6/0x970 fs/splice.c:743
do_splice_from fs/splice.c:941 [inline]
direct_splice_actor+0x16c/0x2c0 fs/splice.c:1164
splice_direct_to_actor+0x305/0x670 fs/splice.c:1108
do_splice_direct_actor fs/splice.c:1207 [inline]
do_splice_direct+0xd7/0x150 fs/splice.c:1233
do_sendfile+0x3ab/0x950 fs/read_write.c:1295
__do_sys_sendfile64 fs/read_write.c:1362 [inline]
__se_sys_sendfile64 fs/read_write.c:1348 [inline]
__x64_sys_sendfile64+0x110/0x150 fs/read_write.c:1348
x64_sys_call+0xfc3/0x2e00 arch/x86/include/generated/asm/syscalls_64.h:41
do_syscall_x64 arch/x86/entry/common.c:52 [inline]
do_syscall_64+0xc9/0x1c0 arch/x86/entry/common.c:83
entry_SYSCALL_64_after_hwframe+0x77/0x7f
value changed: 0x00000000000001c1 -> 0x00000000000001bd
Reported by Kernel Concurrency Sanitizer on:
CPU: 0 PID: 5628 Comm: syz.0.608 Not tainted 6.10.0-syzkaller-08676-g720261cfc732 #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 06/27/2024
==================================================================
I/O error, dev loop7, sector 7168 op 0x1:(WRITE) flags 0x800 phys_seg 16 prio class 0
Buffer I/O error on dev loop7, logical block 896, lost async page write
Buffer I/O error on dev loop7, logical block 897, lost async page write
Buffer I/O error on dev loop7, logical block 898, lost async page write
Buffer I/O error on dev loop7, logical block 899, lost async page write
Buffer I/O error on dev loop7, logical block 900, lost async page write
Buffer I/O error on dev loop7, logical block 901, lost async page write
Buffer I/O error on dev loop7, logical block 902, lost async page write
Buffer I/O error on dev loop7, logical block 903, lost async page write