Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 09/13/2024 Call Trace: __dump_stack lib/dump_stack.c:94 [inline] dump_stack_lvl+0xf2/0x150 lib/dump_stack.c:120 dump_stack+0x15/0x1a lib/dump_stack.c:129 ================================================================== BUG: KCSAN: data-race in console_flush_all / console_flush_all write to 0xffffffff8681a0d8 of 8 bytes by task 26562 on cpu 1: console_emit_next_record kernel/printk/printk.c:3083 [inline] console_flush_all+0x395/0x770 kernel/printk/printk.c:3210 __console_flush_and_unlock kernel/printk/printk.c:3269 [inline] console_unlock+0xab/0x330 kernel/printk/printk.c:3309 vprintk_emit+0x3f4/0x680 kernel/printk/printk.c:2432 vprintk_default+0x26/0x30 kernel/printk/printk.c:2447 vprintk+0x75/0x80 kernel/printk/printk_safe.c:86 _printk+0x7a/0xa0 kernel/printk/printk.c:2457 isofs_read_inode fs/isofs/inode.c:1370 [inline] __isofs_iget+0xe9d/0xf80 fs/isofs/inode.c:1509 isofs_iget fs/isofs/isofs.h:133 [inline] isofs_get_blocks+0x18c/0x4a0 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+0x189/0x8c0 fs/isofs/namei.c:165 __lookup_slow+0x184/0x250 fs/namei.c:1791 lookup_slow+0x3c/0x60 fs/namei.c:1808 walk_component fs/namei.c:2112 [inline] link_path_walk+0x69e/0x820 fs/namei.c:2477 path_openat+0x1af/0x1fa0 fs/namei.c:3983 do_filp_open+0x107/0x230 fs/namei.c:4014 do_sys_openat2+0xab/0x120 fs/open.c:1402 do_sys_open fs/open.c:1417 [inline] __do_sys_openat fs/open.c:1433 [inline] __se_sys_openat fs/open.c:1428 [inline] __x64_sys_openat+0xf3/0x120 fs/open.c:1428 x64_sys_call+0x2b30/0x2dc0 arch/x86/include/generated/asm/syscalls_64.h:258 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 0xffffffff8681a0d8 of 8 bytes by task 26566 on cpu 0: console_flush_all+0x57e/0x770 kernel/printk/printk.c:3211 __console_flush_and_unlock kernel/printk/printk.c:3269 [inline] console_unlock+0xab/0x330 kernel/printk/printk.c:3309 vprintk_emit+0x3f4/0x680 kernel/printk/printk.c:2432 vprintk_default+0x26/0x30 kernel/printk/printk.c:2447 vprintk+0x75/0x80 kernel/printk/printk_safe.c:86 _printk+0x7a/0xa0 kernel/printk/printk.c:2457 printk_stack_address arch/x86/kernel/dumpstack.c:72 [inline] show_trace_log_lvl+0x380/0x400 arch/x86/kernel/dumpstack.c:285 __dump_stack lib/dump_stack.c:94 [inline] dump_stack_lvl+0xf2/0x150 lib/dump_stack.c:120 dump_stack+0x15/0x1a lib/dump_stack.c:129 fail_dump lib/fault-inject.c:53 [inline] should_fail_ex+0x223/0x230 lib/fault-inject.c:154 should_fail+0xb/0x10 lib/fault-inject.c:164 should_fail_usercopy+0x1a/0x20 lib/fault-inject-usercopy.c:37 _inline_copy_from_user include/linux/uaccess.h:163 [inline] _copy_from_user+0x1e/0xb0 lib/usercopy.c:18 copy_from_user include/linux/uaccess.h:212 [inline] ioctl_preallocate fs/ioctl.c:274 [inline] file_ioctl fs/ioctl.c:335 [inline] do_vfs_ioctl+0x113c/0x1530 fs/ioctl.c:885 __do_sys_ioctl fs/ioctl.c:904 [inline] __se_sys_ioctl+0x80/0x140 fs/ioctl.c:892 __x64_sys_ioctl+0x43/0x50 fs/ioctl.c:892 x64_sys_call+0x1690/0x2dc0 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 value changed: 0x00000000000088b1 -> 0x00000000000088b2 Reported by Kernel Concurrency Sanitizer on: CPU: 0 UID: 0 PID: 26566 Comm: syz.6.17366 Not tainted 6.13.0-rc7-syzkaller-00039-gc3812b15000c #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 09/13/2024 ================================================================== fail_dump lib/fault-inject.c:53 [inline] should_fail_ex+0x223/0x230 lib/fault-inject.c:154 should_fail+0xb/0x10 lib/fault-inject.c:164 should_fail_usercopy+0x1a/0x20 lib/fault-inject-usercopy.c:37 _inline_copy_from_user include/linux/uaccess.h:163 [inline] _copy_from_user+0x1e/0xb0 lib/usercopy.c:18 copy_from_user include/linux/uaccess.h:212 [inline] ioctl_preallocate fs/ioctl.c:274 [inline] file_ioctl fs/ioctl.c:335 [inline] do_vfs_ioctl+0x113c/0x1530 fs/ioctl.c:885 __do_sys_ioctl fs/ioctl.c:904 [inline] __se_sys_ioctl+0x80/0x140 fs/ioctl.c:892 __x64_sys_ioctl+0x43/0x50 fs/ioctl.c:892 x64_sys_call+0x1690/0x2dc0 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 RIP: 0033:0x7f1416635d29 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:00007f1414c80038 EFLAGS: 00000246 ORIG_RAX: 0000000000000010 RAX: ffffffffffffffda RBX: 00007f1416826080 RCX: 00007f1416635d29 RDX: 0000000020000080 RSI: 0000000040305839 RDI: 0000000000000005 RBP: 00007f1414c80090 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000001 R13: 0000000000000000 R14: 00007f1416826080 R15: 00007ffd4e22f8a8