R13: ffff8881097c8000 R14: ffff8881097c8000 R15: ffff88810a506038 FS: 00007f9bd18d76c0(0000) GS:ffff8882aef47000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 00007f21964c4620 CR3: 0000000129a4a000 CR4: 00000000003506f0 ================================================================== BUG: KCSAN: data-race in console_flush_all / console_flush_all write to 0xffffffff86a1f818 of 8 bytes by task 8612 on cpu 0: console_emit_next_record kernel/printk/printk.c:3099 [inline] console_flush_all+0x35a/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 isofs_read_inode fs/isofs/inode.c:1378 [inline] __isofs_iget+0xfe9/0x1100 fs/isofs/inode.c:1519 isofs_iget fs/isofs/isofs.h:135 [inline] isofs_get_blocks+0x185/0x490 fs/isofs/inode.c:1064 isofs_get_block fs/isofs/inode.c:1117 [inline] isofs_bmap fs/isofs/inode.c:1128 [inline] isofs_bread+0x5b/0x100 fs/isofs/inode.c:1136 isofs_find_entry fs/isofs/namei.c:59 [inline] isofs_lookup+0x1a8/0x930 fs/isofs/namei.c:165 lookup_open fs/namei.c:3686 [inline] open_last_lookups fs/namei.c:3807 [inline] path_openat+0xcf3/0x2170 fs/namei.c:4043 do_filp_open+0x109/0x230 fs/namei.c:4073 do_sys_openat2+0xa6/0x110 fs/open.c:1435 do_sys_open fs/open.c:1450 [inline] __do_sys_openat fs/open.c:1466 [inline] __se_sys_openat fs/open.c:1461 [inline] __x64_sys_openat+0xf2/0x120 fs/open.c:1461 x64_sys_call+0x2e9c/0x2ff0 arch/x86/include/generated/asm/syscalls_64.h:258 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 0xffffffff86a1f818 of 8 bytes by task 8610 on cpu 1: console_flush_all+0x563/0x730 kernel/printk/printk.c:3227 __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 __show_regs+0x267/0x440 arch/x86/kernel/process_64.c:124 show_regs+0x36/0x70 arch/x86/kernel/dumpstack.c:464 __warn+0x13e/0x340 kernel/panic.c:835 __report_bug lib/bug.c:195 [inline] report_bug+0x309/0x400 lib/bug.c:215 handle_bug+0x84/0x160 arch/x86/kernel/traps.c:338 exc_invalid_op+0x1a/0x50 arch/x86/kernel/traps.c:392 asm_exc_invalid_op+0x1a/0x20 arch/x86/include/asm/idtentry.h:621 reg_bounds_sanity_check+0x673/0x680 kernel/bpf/verifier.c:2722 reg_set_min_max+0x1eb/0x260 kernel/bpf/verifier.c:16335 check_cond_jmp_op+0x1080/0x16e0 kernel/bpf/verifier.c:16768 do_check_insn kernel/bpf/verifier.c:19956 [inline] do_check+0x332a/0x7a10 kernel/bpf/verifier.c:20093 do_check_common+0xc3a/0x1290 kernel/bpf/verifier.c:23258 do_check_main kernel/bpf/verifier.c:23341 [inline] bpf_check+0x942b/0xd9e0 kernel/bpf/verifier.c:24700 bpf_prog_load+0xedd/0x1070 kernel/bpf/syscall.c:2979 __sys_bpf+0x462/0x7b0 kernel/bpf/syscall.c:6029 __do_sys_bpf kernel/bpf/syscall.c:6139 [inline] __se_sys_bpf kernel/bpf/syscall.c:6137 [inline] __x64_sys_bpf+0x41/0x50 kernel/bpf/syscall.c:6137 x64_sys_call+0x2aea/0x2ff0 arch/x86/include/generated/asm/syscalls_64.h:322 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: 0x000000000000162f -> 0x0000000000001630 Reported by Kernel Concurrency Sanitizer on: CPU: 1 UID: 0 PID: 8610 Comm: syz.2.1429 Not tainted 6.16.0-syzkaller-11568-gd632ab86aff2 #0 PREEMPT(voluntary) Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 07/12/2025 ================================================================== Call Trace: reg_set_min_max+0x1eb/0x260 kernel/bpf/verifier.c:16335 check_cond_jmp_op+0x1080/0x16e0 kernel/bpf/verifier.c:16768 do_check_insn kernel/bpf/verifier.c:19956 [inline] do_check+0x332a/0x7a10 kernel/bpf/verifier.c:20093 do_check_common+0xc3a/0x1290 kernel/bpf/verifier.c:23258 do_check_main kernel/bpf/verifier.c:23341 [inline] bpf_check+0x942b/0xd9e0 kernel/bpf/verifier.c:24700 bpf_prog_load+0xedd/0x1070 kernel/bpf/syscall.c:2979 __sys_bpf+0x462/0x7b0 kernel/bpf/syscall.c:6029 __do_sys_bpf kernel/bpf/syscall.c:6139 [inline] __se_sys_bpf kernel/bpf/syscall.c:6137 [inline] __x64_sys_bpf+0x41/0x50 kernel/bpf/syscall.c:6137 x64_sys_call+0x2aea/0x2ff0 arch/x86/include/generated/asm/syscalls_64.h:322 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 RIP: 0033:0x7f9bd326eb69 Code: ff ff c3 66 2e 0f 1f 84 00 00 00 00 00 0f 1f 40 00 48 89 f8 48 89 f7 48 89 d6 48 89 ca 4d 89 c2 4d 89 c8 4c 8b 4c 24 08 0f 05 <48> 3d 01 f0 ff ff 73 01 c3 48 c7 c1 a8 ff ff ff f7 d8 64 89 01 48 RSP: 002b:00007f9bd18d7038 EFLAGS: 00000246 ORIG_RAX: 0000000000000141 RAX: ffffffffffffffda RBX: 00007f9bd3495fa0 RCX: 00007f9bd326eb69 RDX: 0000000000000048 RSI: 00002000000054c0 RDI: 0000000000000005 RBP: 00007f9bd32f1df1 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000 R13: 0000000000000001 R14: 00007f9bd3495fa0 R15: 00007ffeb3a7c638 ---[ end trace 0000000000000000 ]---