syzbot |
sign-in | mailing list | source | docs |
🐞 Open [982] ≡ Subsystems 🐞 Fixed [5236] 🐞 Invalid [12500] ⬇ Missing Backports [83] 📈 Kernel Health 📈 Bug Lifetimes 📈 Fuzzing 📈 Crashes | 💬 Send us feedback |
================================================================== BUG: KCSAN: data-race in data_push_tail / hex_string write to 0xffffffff84162a16 of 1 bytes by task 12624 on cpu 1: hex_string+0x265/0x350 lib/vsprintf.c:1179 pointer+0x15d/0x820 lib/vsprintf.c:2399 vsnprintf+0x8a1/0xed0 lib/vsprintf.c:2801 vscnprintf+0x29/0x80 lib/vsprintf.c:2900 printk_sprint kernel/printk/printk.c:2012 [inline] vprintk_store+0x4c1/0x9c0 kernel/printk/printk.c:2115 vprintk_emit+0xca/0x3d0 kernel/printk/printk.c:2157 vprintk_default+0x22/0x30 kernel/printk/printk.c:2185 vprintk+0x15a/0x170 kernel/printk/printk_safe.c:392 printk+0x62/0x87 kernel/printk/printk.c:2216 show_opcodes+0xc1/0xe0 arch/x86/kernel/dumpstack.c:129 show_ip arch/x86/kernel/dumpstack.c:150 [inline] show_iret_regs+0x2f/0x60 arch/x86/kernel/dumpstack.c:155 __show_regs+0x1e/0x330 arch/x86/kernel/process_64.c:74 show_regs_if_on_stack arch/x86/kernel/dumpstack.c:173 [inline] show_trace_log_lvl+0x548/0x600 arch/x86/kernel/dumpstack.c:298 __dump_stack lib/dump_stack.c:88 [inline] dump_stack_lvl+0xb7/0x103 lib/dump_stack.c:105 dump_stack+0x11/0x1a lib/dump_stack.c:112 fail_dump lib/fault-inject.c:52 [inline] should_fail+0x23c/0x250 lib/fault-inject.c:146 __should_failslab+0x81/0x90 mm/failslab.c:33 should_failslab+0x5/0x20 mm/slab_common.c:1326 slab_pre_alloc_hook mm/slab.h:494 [inline] slab_alloc mm/slab.c:3306 [inline] __do_kmalloc mm/slab.c:3700 [inline] __kmalloc_track_caller+0x64/0x340 mm/slab.c:3717 memdup_user mm/util.c:173 [inline] strndup_user+0x73/0x120 mm/util.c:232 copy_mount_string fs/namespace.c:3143 [inline] __do_sys_mount fs/namespace.c:3441 [inline] __se_sys_mount+0x4e/0x2e0 fs/namespace.c:3433 __x64_sys_mount+0x63/0x70 fs/namespace.c:3433 do_syscall_x64 arch/x86/entry/common.c:50 [inline] do_syscall_64+0x3d/0x90 arch/x86/entry/common.c:80 entry_SYSCALL_64_after_hwframe+0x44/0xae read to 0xffffffff84162a10 of 8 bytes by task 12635 on cpu 0: data_make_reusable kernel/printk/printk_ringbuffer.c:587 [inline] data_push_tail+0x125/0x460 kernel/printk/printk_ringbuffer.c:672 data_alloc+0xbc/0x2b0 kernel/printk/printk_ringbuffer.c:1043 prb_reserve+0x8f0/0xbc0 kernel/printk/printk_ringbuffer.c:1549 vprintk_store+0x3e9/0x9c0 kernel/printk/printk.c:2105 vprintk_emit+0xca/0x3d0 kernel/printk/printk.c:2157 vprintk_default+0x22/0x30 kernel/printk/printk.c:2185 vprintk+0x15a/0x170 kernel/printk/printk_safe.c:392 printk+0x62/0x87 kernel/printk/printk.c:2216 fail_dump lib/fault-inject.c:45 [inline] should_fail+0x223/0x250 lib/fault-inject.c:146 should_fail_usercopy+0x16/0x20 lib/fault-inject-usercopy.c:37 _copy_to_user+0x1c/0x90 lib/usercopy.c:29 copy_to_user include/linux/uaccess.h:200 [inline] simple_read_from_buffer+0xab/0x120 fs/libfs.c:741 proc_fail_nth_read+0xf6/0x140 fs/proc/base.c:1422 vfs_read+0x154/0x5d0 fs/read_write.c:494 ksys_read+0xce/0x180 fs/read_write.c:634 __do_sys_read fs/read_write.c:644 [inline] __se_sys_read fs/read_write.c:642 [inline] __x64_sys_read+0x3e/0x50 fs/read_write.c:642 do_syscall_x64 arch/x86/entry/common.c:50 [inline] do_syscall_64+0x3d/0x90 arch/x86/entry/common.c:80 entry_SYSCALL_64_after_hwframe+0x44/0xae value changed: 0x00000000fffff999 -> 0x6666203a65646f43 Reported by Kernel Concurrency Sanitizer on: CPU: 0 PID: 12635 Comm: syz-executor.5 Not tainted 5.14.0-rc2-syzkaller #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 ==================================================================
Time | Kernel | Commit | Syzkaller | Config | Log | Report | Syz repro | C repro | VM info | Assets (help?) | Manager | Title |
---|---|---|---|---|---|---|---|---|---|---|---|---|
2021/07/23 18:14 | upstream | 8baef6386baa | bc5f1d88 | .config | console log | report | info | ci2-upstream-kcsan-gce | KCSAN: data-race in data_push_tail / hex_string |