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Groups > linux.kernel > #1319060
| From | Toralf Förster <toralf.foerster@gmx.de> |
|---|---|
| Newsgroups | linux.kernel |
| Subject | UBSAN: Undefined behaviour in mm/fadvise.c:72:10 |
| Date | 2016-01-27 16:20 +0100 |
| Message-ID | <qVA31-5qa-23@gated-at.bofh.it> (permalink) |
| Organization | linux.* mail to news gateway |
got this at a 32 bit Gentoo Linux KVM while fuzzying with trinity : Jan 27 15:30:50 n22kvm-clone kernel: ================================================================================ Jan 27 15:30:50 n22kvm-clone kernel: UBSAN: Undefined behaviour in mm/fadvise.c:72:10 Jan 27 15:30:50 n22kvm-clone kernel: signed integer overflow: Jan 27 15:30:50 n22kvm-clone kernel: 3218697763487219936 + 7957419010335735808 cannot be represented in type 'long long int' Jan 27 15:30:50 n22kvm-clone kernel: CPU: 1 PID: 30658 Comm: trinity-c0 Not tainted 4.5.0-rc1 #1 Jan 27 15:30:50 n22kvm-clone kernel: Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS rel-1.8.2-0-g33fbe13 by qemu-project.org 04/01/2014 Jan 27 15:30:50 n22kvm-clone kernel: f0529f4c 00000000 f0529e70 d2bcd78b 00000007 f0529ea0 f0529e80 d2c31bbe Jan 27 15:30:50 n22kvm-clone kernel: f0529e80 d3531e1c f0529f04 d2c31f0b d3308e5c f0529ea4 0000002b f0529ecc Jan 27 15:30:50 n22kvm-clone kernel: d3531e1c 0000002b 00000286 38313233 37373936 38343336 39313237 00363339 Jan 27 15:30:50 n22kvm-clone kernel: Call Trace: Jan 27 15:30:50 n22kvm-clone kernel: [<d2bcd78b>] dump_stack+0x42/0x67 Jan 27 15:30:50 n22kvm-clone kernel: [<d2c31bbe>] ubsan_epilogue+0xe/0x40 Jan 27 15:30:50 n22kvm-clone kernel: [<d2c31f0b>] handle_overflow+0xbb/0xf0 Jan 27 15:30:50 n22kvm-clone kernel: [<d27d8676>] ? __audit_syscall_entry+0x106/0x2a0 Jan 27 15:30:50 n22kvm-clone kernel: [<d2c31f52>] __ubsan_handle_add_overflow+0x12/0x20 Jan 27 15:30:50 n22kvm-clone kernel: [<d28f5bf3>] SyS_fadvise64_64+0xd3/0x630 Jan 27 15:30:50 n22kvm-clone kernel: [<d260333f>] do_fast_syscall_32+0x14f/0x940 Jan 27 15:30:50 n22kvm-clone kernel: [<d28f5b20>] ? reset_node_managed_pages+0x50/0x50 Jan 27 15:30:50 n22kvm-clone kernel: [<d31882a1>] sysenter_past_esp+0x42/0x69 Jan 27 15:30:50 n22kvm-clone kernel: ================================================================================ -- Toralf, pgp: C4EACDDE 0076E94E
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UBSAN: Undefined behaviour in mm/fadvise.c:72:10 Toralf Förster <toralf.foerster@gmx.de> - 2016-01-27 16:20 +0100
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