EXT4-fs: Ignoring removed mblk_io_submit option EXT4-fs (loop0): encrypted files will use data=ordered instead of data journaling mode [EXT4 FS bs=1024, gc=1, bpg=8192, ipg=32, mo=e016c018, mo2=0002] System zones: 1-12 ================================================================== BUG: KCSAN: data-race in _prb_read_valid / prb_reserve write to 0xffffffff868dffa0 of 88 bytes by task 26182 on cpu 0: prb_reserve+0x696/0xaf0 kernel/printk/printk_ringbuffer.c:1635 vprintk_store+0x56d/0x860 kernel/printk/printk.c:2326 vprintk_emit+0x178/0x650 kernel/printk/printk.c:2426 vprintk_default+0x26/0x30 kernel/printk/printk.c:2465 vprintk+0x1d/0x30 kernel/printk/printk_safe.c:82 _printk+0x79/0xa0 kernel/printk/printk.c:2475 ib_get_eth_speed+0x33d/0x4b0 drivers/infiniband/core/verbs.c:2006 siw_query_port+0x3a/0x2d0 drivers/infiniband/sw/siw/siw_verbs.c:179 iw_query_port drivers/infiniband/core/device.c:2100 [inline] ib_query_port+0x390/0x3d0 drivers/infiniband/core/device.c:2141 ib_setup_port_attrs+0x14a/0x1430 drivers/infiniband/core/sysfs.c:1429 add_one_compat_dev+0x261/0x360 drivers/infiniband/core/device.c:968 rdma_dev_init_net+0x182/0x210 drivers/infiniband/core/device.c:1184 ops_init+0x22a/0x2e0 net/core/net_namespace.c:138 setup_net+0x124/0x2e0 net/core/net_namespace.c:442 copy_net_ns+0x55c/0x690 net/core/net_namespace.c:574 create_new_namespaces+0x20e/0x3d0 kernel/nsproxy.c:110 unshare_nsproxy_namespaces+0xe8/0x120 kernel/nsproxy.c:218 ksys_unshare+0x3d0/0x6d0 kernel/fork.c:3121 __do_sys_unshare kernel/fork.c:3192 [inline] __se_sys_unshare kernel/fork.c:3190 [inline] __x64_sys_unshare+0x1f/0x30 kernel/fork.c:3190 x64_sys_call+0x2d4b/0x2fb0 arch/x86/include/generated/asm/syscalls_64.h:273 do_syscall_x64 arch/x86/entry/syscall_64.c:63 [inline] do_syscall_64+0xd2/0x200 arch/x86/entry/syscall_64.c:94 entry_SYSCALL_64_after_hwframe+0x77/0x7f read to 0xffffffff868dffa0 of 8 bytes by task 26187 on cpu 1: desc_read kernel/printk/printk_ringbuffer.c:486 [inline] prb_first_seq kernel/printk/printk_ringbuffer.c:1957 [inline] _prb_read_valid+0x383/0x920 kernel/printk/printk_ringbuffer.c:2114 prb_read_valid+0x3c/0x60 kernel/printk/printk_ringbuffer.c:2185 printk_get_next_message+0xc8/0x510 kernel/printk/printk.c:3005 console_emit_next_record kernel/printk/printk.c:3092 [inline] console_flush_all+0x290/0x730 kernel/printk/printk.c:3226 __console_flush_and_unlock kernel/printk/printk.c:3285 [inline] console_unlock+0xa1/0x330 kernel/printk/printk.c:3325 vprintk_emit+0x388/0x650 kernel/printk/printk.c:2450 vprintk_default+0x26/0x30 kernel/printk/printk.c:2465 vprintk+0x1d/0x30 kernel/printk/printk_safe.c:82 _printk+0x79/0xa0 kernel/printk/printk.c:2475 debug_print_tree+0xf9/0x110 fs/ext4/block_validity.c:144 ext4_setup_system_zone+0x45b/0x610 fs/ext4/block_validity.c:265 __ext4_fill_super fs/ext4/super.c:5531 [inline] ext4_fill_super+0x2e0b/0x34e0 fs/ext4/super.c:5724 get_tree_bdev_flags+0x291/0x300 fs/super.c:1679 get_tree_bdev+0x1f/0x30 fs/super.c:1702 ext4_get_tree+0x1c/0x30 fs/ext4/super.c:5756 vfs_get_tree+0x54/0x1d0 fs/super.c:1802 do_new_mount+0x207/0x680 fs/namespace.c:3856 path_mount+0x4a4/0xb20 fs/namespace.c:4180 do_mount fs/namespace.c:4193 [inline] __do_sys_mount fs/namespace.c:4404 [inline] __se_sys_mount+0x28f/0x2e0 fs/namespace.c:4381 __x64_sys_mount+0x67/0x80 fs/namespace.c:4381 x64_sys_call+0xd36/0x2fb0 arch/x86/include/generated/asm/syscalls_64.h:166 do_syscall_x64 arch/x86/entry/syscall_64.c:63 [inline] do_syscall_64+0xd2/0x200 arch/x86/entry/syscall_64.c:94 entry_SYSCALL_64_after_hwframe+0x77/0x7f value changed: 0x0000000000006cd8 -> 0x0000000000008cd8 Reported by Kernel Concurrency Sanitizer on: CPU: 1 UID: 0 PID: 26187 Comm: syz.0.19091 Not tainted 6.15.0-syzkaller-10815-gbb1556ec9464 #0 PREEMPT(voluntary) Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 05/07/2025 ================================================================== EXT4-fs (loop0): 1 truncate cleaned up EXT4-fs (loop0): mounted filesystem 00000000-0000-0000-0000-000000000000 r/w without journal. Quota mode: writeback. __nla_validate_parse: 19 callbacks suppressed netlink: 12 bytes leftover after parsing attributes in process `syz.0.19091'. netlink: 8 bytes leftover after parsing attributes in process `syz.0.19091'.