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================================================================== BUG: KCSAN: data-race in _copy_to_iter / string write to 0xffff88811bb16050 of 1 bytes by task 4878 on cpu 0: string_nocheck lib/vsprintf.c:650 [inline] string+0x16c/0x210 lib/vsprintf.c:728 bdev_name+0x140/0x250 lib/vsprintf.c:968 pointer+0x5e3/0xd20 lib/vsprintf.c:2474 vsnprintf+0x861/0xe30 lib/vsprintf.c:2828 snprintf+0x87/0xb0 lib/vsprintf.c:2959 ext4_multi_mount_protect+0x4d0/0x5e0 fs/ext4/mmp.c:386 __ext4_fill_super fs/ext4/super.c:5325 [inline] ext4_fill_super+0x2940/0x39e0 fs/ext4/super.c:5664 get_tree_bdev+0x256/0x2e0 fs/super.c:1635 ext4_get_tree+0x1c/0x30 fs/ext4/super.c:5696 vfs_get_tree+0x56/0x1e0 fs/super.c:1800 do_new_mount+0x227/0x690 fs/namespace.c:3472 path_mount+0x49b/0xb30 fs/namespace.c:3799 do_mount fs/namespace.c:3812 [inline] __do_sys_mount fs/namespace.c:4020 [inline] __se_sys_mount+0x27c/0x2d0 fs/namespace.c:3997 __x64_sys_mount+0x67/0x80 fs/namespace.c:3997 x64_sys_call+0x203e/0x2d60 arch/x86/include/generated/asm/syscalls_64.h:166 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 0xffff88811bb16000 of 512 bytes by task 4477 on cpu 1: instrument_copy_to_user include/linux/instrumented.h:113 [inline] copy_to_user_iter lib/iov_iter.c:24 [inline] iterate_ubuf include/linux/iov_iter.h:29 [inline] iterate_and_advance2 include/linux/iov_iter.h:245 [inline] iterate_and_advance include/linux/iov_iter.h:271 [inline] _copy_to_iter+0x126/0xb00 lib/iov_iter.c:185 copy_page_to_iter+0x171/0x2b0 lib/iov_iter.c:362 copy_folio_to_iter include/linux/uio.h:180 [inline] filemap_read+0x42c/0x690 mm/filemap.c:2676 blkdev_read_iter+0x217/0x2c0 block/fops.c:764 new_sync_read fs/read_write.c:395 [inline] vfs_read+0x5e9/0x6e0 fs/read_write.c:476 ksys_read+0xeb/0x1b0 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+0x42/0x50 fs/read_write.c:627 x64_sys_call+0x27d3/0x2d60 arch/x86/include/generated/asm/syscalls_64.h:1 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 Reported by Kernel Concurrency Sanitizer on: CPU: 1 UID: 0 PID: 4477 Comm: udevd Not tainted 6.11.0-rc5-syzkaller-00079-g928f79a188aa #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 08/06/2024 ==================================================================
Time | Kernel | Commit | Syzkaller | Config | Log | Report | Syz repro | C repro | VM info | Assets (help?) | Manager | Title |
---|---|---|---|---|---|---|---|---|---|---|---|---|
2024/08/29 11:49 | upstream | 928f79a188aa | ef3de9e8 | .config | console log | report | info | [disk image] [vmlinux] [kernel image] | ci2-upstream-kcsan-gce | KCSAN: data-race in _copy_to_iter / string | ||
2024/08/22 08:00 | upstream | 872cf28b8df9 | ca02180f | .config | console log | report | info | [disk image] [vmlinux] [kernel image] | ci2-upstream-kcsan-gce | KCSAN: data-race in _copy_to_iter / string |