Oops: general protection fault, probably for non-canonical address 0xc748c789c3899076: 0000 [#1] PREEMPT SMP KASAN NOPTI CPU: 0 UID: 0 PID: 5874 Comm: syz-executor Not tainted 6.14.0-rc4-syzkaller-g1973160c90d7 #0 Hardware name: QEMU Standard PC (Q35 + ICH9, 2009), BIOS 1.16.3-debian-1.16.3-2~bpo12+1 04/01/2014 RIP: 0010:find_stack lib/stackdepot.c:553 [inline] RIP: 0010:stack_depot_save_flags+0x1b4/0x940 lib/stackdepot.c:618 Code: 00 31 f6 48 89 d5 4c 89 cb e8 d8 ba c7 ff 49 89 d9 8b 5c 24 04 48 89 ea 4c 8b 44 24 08 45 85 e4 75 67 4d 8b 3f 49 39 d7 74 5c <45> 39 77 10 75 f2 45 39 4f 14 75 ec 31 c0 49 8b 0c c0 49 3b 4c c7 RSP: 0018:ffffc9000cdaf280 EFLAGS: 00010083 RAX: ffff88805e200000 RBX: 0000000000000000 RCX: 0000000000943390 RDX: ffff88805eb43390 RSI: 0000000000000001 RDI: 000000002bacfb0a RBP: 0000000088855f98 R08: ffffc9000cdaf2f0 R09: 000000000000000e R10: dffffc0000000000 R11: fffffbfff2079def R12: dffffc0000000000 R13: 000000000000000e R14: 00000000f1d94339 R15: c748c789c3899066 FS: 0000555561f4c500(0000) GS:ffff88801fc00000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 00007fff86834d40 CR3: 0000000040244000 CR4: 0000000000352ef0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 Call Trace: kasan_save_stack+0x4f/0x60 mm/kasan/common.c:48 kasan_record_aux_stack+0xaa/0xc0 mm/kasan/generic.c:548 __call_rcu_common kernel/rcu/tree.c:3065 [inline] call_rcu+0x168/0xac0 kernel/rcu/tree.c:3172 radix_tree_node_free lib/radix-tree.c:310 [inline] radix_tree_shrink lib/radix-tree.c:536 [inline] delete_node+0x57d/0x770 lib/radix-tree.c:554 radix_tree_delete_item+0x2e0/0x3f0 lib/radix-tree.c:1430 free_pid+0x1a6/0x290 kernel/pid.c:155 __unhash_process kernel/exit.c:131 [inline] __exit_signal kernel/exit.c:200 [inline] release_task+0xddc/0x1830 kernel/exit.c:257 wait_task_zombie kernel/exit.c:1249 [inline] wait_consider_task+0x1a14/0x2e60 kernel/exit.c:1476 do_wait_thread kernel/exit.c:1539 [inline] __do_wait+0x1b0/0x850 kernel/exit.c:1657 do_wait+0x1e9/0x550 kernel/exit.c:1691 kernel_wait4+0x2a7/0x3e0 kernel/exit.c:1850 __do_sys_wait4 kernel/exit.c:1878 [inline] __se_sys_wait4 kernel/exit.c:1874 [inline] __x64_sys_wait4+0x134/0x1e0 kernel/exit.c:1874 do_syscall_x64 arch/x86/entry/common.c:52 [inline] do_syscall_64+0xf3/0x230 arch/x86/entry/common.c:83 entry_SYSCALL_64_after_hwframe+0x77/0x7f RIP: 0033:0x7f7dbf183057 Code: 89 7c 24 10 48 89 4c 24 18 e8 45 1b 03 00 4c 8b 54 24 18 8b 54 24 14 41 89 c0 48 8b 74 24 08 8b 7c 24 10 b8 3d 00 00 00 0f 05 <48> 3d 00 f0 ff ff 77 31 44 89 c7 89 44 24 10 e8 95 1b 03 00 8b 44 RSP: 002b:00007fff868356b0 EFLAGS: 00000293 ORIG_RAX: 000000000000003d RAX: ffffffffffffffda RBX: 000000000000005f RCX: 00007f7dbf183057 RDX: 0000000040000001 RSI: 00007fff8683571c RDI: 00000000ffffffff RBP: 00007fff8683571c R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000293 R12: 0000000000001388 R13: 00000000000927c0 R14: 0000000000047932 R15: 00007fff86835770 Modules linked in: ---[ end trace 0000000000000000 ]--- RIP: 0010:find_stack lib/stackdepot.c:553 [inline] RIP: 0010:stack_depot_save_flags+0x1b4/0x940 lib/stackdepot.c:618 Code: 00 31 f6 48 89 d5 4c 89 cb e8 d8 ba c7 ff 49 89 d9 8b 5c 24 04 48 89 ea 4c 8b 44 24 08 45 85 e4 75 67 4d 8b 3f 49 39 d7 74 5c <45> 39 77 10 75 f2 45 39 4f 14 75 ec 31 c0 49 8b 0c c0 49 3b 4c c7 RSP: 0018:ffffc9000cdaf280 EFLAGS: 00010083 RAX: ffff88805e200000 RBX: 0000000000000000 RCX: 0000000000943390 RDX: ffff88805eb43390 RSI: 0000000000000001 RDI: 000000002bacfb0a RBP: 0000000088855f98 R08: ffffc9000cdaf2f0 R09: 000000000000000e R10: dffffc0000000000 R11: fffffbfff2079def R12: dffffc0000000000 R13: 000000000000000e R14: 00000000f1d94339 R15: c748c789c3899066 FS: 0000555561f4c500(0000) GS:ffff88801fc00000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 00007fff86834d40 CR3: 0000000040244000 CR4: 0000000000352ef0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 ---------------- Code disassembly (best guess): 0: 00 31 add %dh,(%rcx) 2: f6 48 89 d5 testb $0xd5,-0x77(%rax) 6: 4c 89 cb mov %r9,%rbx 9: e8 d8 ba c7 ff call 0xffc7bae6 e: 49 89 d9 mov %rbx,%r9 11: 8b 5c 24 04 mov 0x4(%rsp),%ebx 15: 48 89 ea mov %rbp,%rdx 18: 4c 8b 44 24 08 mov 0x8(%rsp),%r8 1d: 45 85 e4 test %r12d,%r12d 20: 75 67 jne 0x89 22: 4d 8b 3f mov (%r15),%r15 25: 49 39 d7 cmp %rdx,%r15 28: 74 5c je 0x86 * 2a: 45 39 77 10 cmp %r14d,0x10(%r15) <-- trapping instruction 2e: 75 f2 jne 0x22 30: 45 39 4f 14 cmp %r9d,0x14(%r15) 34: 75 ec jne 0x22 36: 31 c0 xor %eax,%eax 38: 49 8b 0c c0 mov (%r8,%rax,8),%rcx 3c: 49 rex.WB 3d: 3b .byte 0x3b 3e: 4c rex.WR 3f: c7 .byte 0xc7