https://bugzilla.kernel.org/show_bug.cgi?id=206525
Bug ID: 206525 Summary: BUG: KASAN: stack-out-of-bounds in test_bit+0x30/0x44 (kernel 5.6-rc1) Product: Platform Specific/Hardware Version: 2.5 Kernel Version: 5.6.0-rc1 Hardware: PPC-32 OS: Linux Tree: Mainline Status: NEW Severity: normal Priority: P1 Component: PPC-32 Assignee: platform_ppc...@kernel-bugs.osdl.org Reporter: erhar...@mailbox.org Regression: No Created attachment 287357 --> https://bugzilla.kernel.org/attachment.cgi?id=287357&action=edit dmesg (5.6.0-rc1 + v2 Fix DSI and ISI... patch, PowerMac G4 DP) [...] Feb 13 20:18:53 T600 kernel: ================================================================== Feb 13 20:18:53 T600 kernel: BUG: KASAN: stack-out-of-bounds in test_bit+0x30/0x44 Feb 13 20:18:53 T600 kernel: Read of size 4 at addr ee8bddac by task systemd/1 Feb 13 20:18:53 T600 kernel: Feb 13 20:18:53 T600 kernel: CPU: 0 PID: 1 Comm: systemd Tainted: G W 5.6.0-rc1-PowerMacG4+ #20 Feb 13 20:18:53 T600 kernel: Call Trace: Feb 13 20:18:53 T600 kernel: [ee8bdc38] [c078cf18] dump_stack+0xbc/0x118 (unreliable) Feb 13 20:18:53 T600 kernel: [ee8bdc68] [c0249f94] print_address_description.isra.0+0x3c/0x420 Feb 13 20:18:53 T600 kernel: [ee8bdcf8] [c024a554] __kasan_report+0x138/0x180 Feb 13 20:18:53 T600 kernel: [ee8bdd38] [c0249718] kasan_report+0x7c/0x104 Feb 13 20:18:53 T600 kernel: [ee8bdd58] [c06526b4] test_bit+0x30/0x44 Feb 13 20:18:53 T600 kernel: [ee8bdd78] [c0657c6c] netlink_bind+0x24c/0x33c Feb 13 20:18:53 T600 kernel: [ee8bde18] [c05c0c3c] __sys_bind+0xd4/0x120 Feb 13 20:18:53 T600 kernel: [ee8bdf38] [c001a278] ret_from_syscall+0x0/0x34 Feb 13 20:18:53 T600 kernel: --- interrupt: c01 at 0x4f3ea8 LR = 0x8f5b80 Feb 13 20:18:53 T600 kernel: Feb 13 20:18:53 T600 kernel: The buggy address belongs to the page: Feb 13 20:18:53 T600 kernel: page:ef460a94 refcount:0 mapcount:0 mapping:00000000 index:0x0 Feb 13 20:18:53 T600 kernel: flags: 0x0() Feb 13 20:18:53 T600 kernel: raw: 00000000 ef460a98 ef460a98 00000000 00000000 00000000 ffffffff 00000000 Feb 13 20:18:53 T600 kernel: raw: 00000000 Feb 13 20:18:53 T600 kernel: page dumped because: kasan: bad access detected Feb 13 20:18:53 T600 kernel: Feb 13 20:18:53 T600 kernel: addr ee8bddac is located in stack of task systemd/1 at offset 36 in frame: Feb 13 20:18:53 T600 kernel: netlink_bind+0x0/0x33c Feb 13 20:18:53 T600 kernel: Feb 13 20:18:53 T600 kernel: this frame has 1 object: Feb 13 20:18:53 T600 kernel: [32, 36) 'groups' Feb 13 20:18:53 T600 kernel: Feb 13 20:18:53 T600 kernel: Memory state around the buggy address: Feb 13 20:18:53 T600 kernel: ee8bdc80: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 Feb 13 20:18:53 T600 kernel: ee8bdd00: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 Feb 13 20:18:53 T600 kernel: >ee8bdd80: 00 f1 f1 f1 f1 04 f3 f3 f3 00 00 00 00 00 00 00 Feb 13 20:18:53 T600 kernel: ^ Feb 13 20:18:53 T600 kernel: ee8bde00: 00 00 00 00 00 f1 f1 f1 f1 04 f2 04 f2 00 00 00 Feb 13 20:18:53 T600 kernel: ee8bde80: 00 00 00 00 00 00 00 00 00 00 00 00 00 f3 f3 f3 Feb 13 20:18:53 T600 kernel: ================================================================== Happens on my G4 DP with kernel 5.6.0-rc1 and KASAN enabled (outline) during boot. kernel is patched with Christophe's '[v2] powerpc/32s: Fix DSI and ISI exceptions for CONFIG_VMAP_STACK' (https://patchwork.ozlabs.org/patch/1237387/) but CONFIG_VMAP_STACK was not used here. -- You are receiving this mail because: You are watching the assignee of the bug.