Messages in this thread | | | Date | Wed, 14 Jul 2021 05:47:21 -0700 | Subject | [syzbot] UBSAN: shift-out-of-bounds in profile_init | From | syzbot <> |
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Hello,
syzbot found the following issue on:
HEAD commit: 3dbdb38e Merge branch 'for-5.14' of git://git.kernel.org/p.. git tree: upstream console output: https://syzkaller.appspot.com/x/log.txt?x=11342328300000 kernel config: https://syzkaller.appspot.com/x/.config?x=a1fcf15a09815757 dashboard link: https://syzkaller.appspot.com/bug?extid=e68c89a9510c159d9684 syz repro: https://syzkaller.appspot.com/x/repro.syz?x=149a96d2300000 C reproducer: https://syzkaller.appspot.com/x/repro.c?x=114e5bc4300000
IMPORTANT: if you fix the issue, please add the following tag to the commit: Reported-by: syzbot+e68c89a9510c159d9684@syzkaller.appspotmail.com
kernel profiling enabled (shift: 1000000) ================================================================================ UBSAN: shift-out-of-bounds in kernel/profile.c:110:31 shift exponent 1000000 is too large for 64-bit type 'long int' CPU: 0 PID: 8453 Comm: syz-executor969 Tainted: G W 5.13.0-syzkaller #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 Call Trace: __dump_stack lib/dump_stack.c:79 [inline] dump_stack_lvl+0xcd/0x134 lib/dump_stack.c:96 ubsan_epilogue+0xb/0x5a lib/ubsan.c:148 __ubsan_handle_shift_out_of_bounds.cold+0xb1/0x181 lib/ubsan.c:327 profile_init+0xfc/0x110 kernel/profile.c:110 profiling_store+0x5e/0xd0 kernel/ksysfs.c:80 kobj_attr_store+0x50/0x80 lib/kobject.c:856 sysfs_kf_write+0x110/0x160 fs/sysfs/file.c:139 kernfs_fop_write_iter+0x342/0x500 fs/kernfs/file.c:296 call_write_iter include/linux/fs.h:2114 [inline] new_sync_write+0x426/0x650 fs/read_write.c:518 vfs_write+0x796/0xa30 fs/read_write.c:605 ksys_write+0x12d/0x250 fs/read_write.c:658 do_syscall_x64 arch/x86/entry/common.c:50 [inline] do_syscall_64+0x35/0xb0 arch/x86/entry/common.c:80 entry_SYSCALL_64_after_hwframe+0x44/0xae RIP: 0033:0x43ee69 Code: 28 c3 e8 2a 14 00 00 66 2e 0f 1f 84 00 00 00 00 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 c0 ff ff ff f7 d8 64 89 01 48 RSP: 002b:00007ffee8801868 EFLAGS: 00000246 ORIG_RAX: 0000000000000001 RAX: ffffffffffffffda RBX: 0000000000400488 RCX: 000000000043ee69 RDX: 00000000ffffff82 RSI: 00000000200000c0 RDI: 0000000000000003 RBP: 0000000000402e50 R08: 0000000000000000 R09: 0000000000400488 R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000402ee0 R13: 0000000000000000 R14: 00000000004ac018 R15: 0000000000400488 ================================================================================
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