syzkaller login: [ 32.069278] BUG: Bad rss-counter state mm:00000000588c49df type:MM_FILEPAGES val:33 [ 32.070516] BUG: Bad rss-counter state mm:00000000588c49df type:MM_ANONPAGES val:22 [ 32.102637] ================================================================== [ 32.103572] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 32.104615] Read of size 8 at addr ffff88800f232df0 by task sshd/220 [ 32.105412] [ 32.105641] CPU: 0 PID: 220 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 32.106536] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 32.107540] Call Trace: [ 32.107861] [ 32.108148] dump_stack_lvl+0x91/0xf0 [ 32.108662] print_report+0xcc/0x620 [ 32.109173] ? __virt_addr_valid+0x102/0x340 [ 32.109741] ? vma_interval_tree_remove+0xc75/0xec0 [ 32.110359] ? vma_interval_tree_remove+0xc75/0xec0 [ 32.110992] kasan_report+0xbe/0xf0 [ 32.111492] ? vma_interval_tree_remove+0xc75/0xec0 [ 32.112135] vma_interval_tree_remove+0xc75/0xec0 [ 32.112756] vma_prepare+0xc54/0x11a0 [ 32.113256] __split_vma+0x5af/0x950 [ 32.113740] ? __pfx___split_vma+0x10/0x10 [ 32.114270] ? find_held_lock+0x2c/0x110 [ 32.114806] do_vmi_align_munmap+0x2ba/0x11f0 [ 32.115374] ? lock_is_held_type+0x9f/0x120 [ 32.115945] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 32.116579] ? mtree_range_walk+0x632/0x900 [ 32.117165] ? mas_walk+0x5c7/0x7c0 [ 32.117655] do_vmi_munmap+0x1f1/0x2b0 [ 32.118153] mmap_region+0x1f9/0x2660 [ 32.118646] ? vm_mmap_pgoff+0x15c/0x3a0 [ 32.119181] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 32.119917] ? __pfx_lock_acquire+0x10/0x10 [ 32.120466] ? __pfx_mmap_region+0x10/0x10 [ 32.121019] ? security_mmap_addr+0x7d/0xa0 [ 32.121563] ? get_unmapped_area+0x1f5/0x3f0 [ 32.122123] do_mmap+0x854/0xf00 [ 32.122578] vm_mmap_pgoff+0x1a6/0x3a0 [ 32.123080] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 32.123672] ksys_mmap_pgoff+0x3af/0x500 [ 32.124192] do_syscall_64+0x3f/0x90 [ 32.124685] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 32.125352] RIP: 0033:0x7f7164fe4d82 [ 32.125830] Code: eb aa 66 0f 1f 44 00 00 41 f7 c1 ff 0f 00 00 75 27 55 48 89 fd 53 89 cb 48 85 ff 74 33 41 89 da 48 89 ef b8 09 00 00 00 0f 05 <48> 3d 00 f0 ff ff 77 56 5b 5d c3 0f 1f 00 c7 05 ae 03 01 00 16 00 [ 32.128006] RSP: 002b:00007fffdda33518 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 32.128946] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f7164fe4d82 [ 32.129827] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f716441e000 [ 32.130699] RBP: 00007f716441e000 R08: 0000000000000009 R09: 0000000000001000 [ 32.131572] R10: 0000000000000812 R11: 0000000000000206 R12: 0000562cb4536b20 [ 32.132444] R13: 00007fffdda33530 R14: 00007fffdda33560 R15: 00007fffdda338c0 [ 32.133333] [ 32.133646] [ 32.133861] Allocated by task 213: [ 32.134295] kasan_save_stack+0x22/0x50 [ 32.134820] kasan_set_track+0x25/0x30 [ 32.135326] __kasan_slab_alloc+0x59/0x70 [ 32.135886] kmem_cache_alloc+0x16b/0x370 [ 32.136414] vm_area_dup+0x20/0x160 [ 32.136887] __split_vma+0x170/0x950 [ 32.137353] split_vma+0xc6/0x110 [ 32.137805] mprotect_fixup+0x8d2/0xb30 [ 32.138316] do_mprotect_pkey+0x87e/0xd40 [ 32.138847] __x64_sys_mprotect+0x78/0xc0 [ 32.139374] do_syscall_64+0x3f/0x90 [ 32.139871] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 32.140554] [ 32.140848] Freed by task 213: [ 32.141364] kasan_save_stack+0x22/0x50 [ 32.142020] kasan_set_track+0x25/0x30 [ 32.142668] kasan_save_free_info+0x2b/0x50 [ 32.143370] __kasan_slab_free+0x10a/0x190 [ 32.144025] kmem_cache_free+0x10d/0x4d0 [ 32.144563] rcu_core+0x8c8/0x2860 [ 32.145031] __do_softirq+0x1b7/0x7d4 [ 32.145567] [ 32.145852] Last potentially related work creation: [ 32.146486] kasan_save_stack+0x22/0x50 [ 32.146994] __kasan_record_aux_stack+0x8e/0xa0 [ 32.147589] __call_rcu_common.constprop.0+0x6a/0xb90 [ 32.148248] remove_vma+0x139/0x170 [ 32.148730] do_vmi_align_munmap+0xd4a/0x11f0 [ 32.149317] do_vmi_munmap+0x1f1/0x2b0 [ 32.149826] __vm_munmap+0x138/0x3a0 [ 32.150297] __x64_sys_munmap+0x59/0x80 [ 32.150808] do_syscall_64+0x3f/0x90 [ 32.151289] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 32.151948] [ 32.152168] The buggy address belongs to the object at ffff88800f232d98 [ 32.152168] which belongs to the cache vm_area_struct of size 168 [ 32.153693] The buggy address is located 88 bytes inside of [ 32.153693] freed 168-byte region [ffff88800f232d98, ffff88800f232e40) [ 32.155125] [ 32.155341] The buggy address belongs to the physical page: [ 32.156010] page:0000000084b288ea refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xf232 [ 32.157129] memcg:ffff888016697b01 [ 32.157574] flags: 0x100000000000200(slab|node=0|zone=1) [ 32.158230] page_type: 0xffffffff() [ 32.158711] raw: 0100000000000200 ffff88800879fc80 ffffea0000375e80 dead000000000004 [ 32.159642] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff888016697b01 [ 32.160583] page dumped because: kasan: bad access detected [ 32.161272] [ 32.161502] Memory state around the buggy address: [ 32.162092] ffff88800f232c80: fc fc fc fc fc fc fa fb fb fb fb fb fb fb fb fb [ 32.162988] ffff88800f232d00: fb fb fb fb fb fb fb fb fb fb fb fc fc fc fc fc [ 32.163865] >ffff88800f232d80: fc fc fc fa fb fb fb fb fb fb fb fb fb fb fb fb [ 32.164742] ^ [ 32.165598] ffff88800f232e00: fb fb fb fb fb fb fb fb fc fc fc fc fc fc fc fc [ 32.166474] ffff88800f232e80: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 32.167447] ================================================================== [ 32.168578] Disabling lock debugging due to kernel taint [ 34.445990] BUG: Bad rss-counter state mm:00000000d1cab0f2 type:MM_FILEPAGES val:33 [ 34.447502] BUG: Bad rss-counter state mm:00000000d1cab0f2 type:MM_ANONPAGES val:22 [ 34.927006] BUG: Bad rss-counter state mm:000000006b338e30 type:MM_FILEPAGES val:33 [ 34.928044] BUG: Bad rss-counter state mm:000000006b338e30 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:35592' (ECDSA) to the list of known hosts. 2023/06/19 14:07:18 fuzzer started 2023/06/19 14:07:18 dialing manager at localhost:44161 2023/06/19 14:07:18 checking machine... 2023/06/19 14:07:18 checking revisions... [ 35.619803] kmemleak: Automatic memory scanning thread ended 2023/06/19 14:07:18 testing simple program... [ 35.656582] cgroup: Unknown subsys name 'net' [ 35.709486] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 14:07:17 Registers: info registers vcpu 0 RAX=ffff88806ce35000 RBX=0000000000000000 RCX=ffffffff8450c50e RDX=ffffed100d9c6a01 RSI=0000000000000004 RDI=ffffffff812889a5 RBP=dffffc0000000000 RSP=ffffffff85407e10 R8 =0000000000000000 R9 =ffffed100d9c6a00 R10=ffff88806ce35003 R11=ffff888008c58000 R12=ffffffff85d3bed0 R13=1ffffffff0a80fc7 R14=0000000000000000 R15=0000000000000000 RIP=ffffffff8450d49f RFL=00000246 [---Z-P-] CPL=0 II=0 A20=1 SMM=0 HLT=1 ES =0000 0000000000000000 00000000 00000000 CS =0010 0000000000000000 ffffffff 00a09b00 DPL=0 CS64 [-RA] SS =0018 0000000000000000 ffffffff 00c09300 DPL=0 DS [-WA] DS =0000 0000000000000000 00000000 00000000 FS =0000 0000000000000000 00000000 00000000 GS =0000 ffff88806ce00000 00000000 00000000 LDT=0000 fffffe0000000000 00000000 00000000 TR =0040 fffffe0000003000 00004087 00008b00 DPL=0 TSS64-busy GDT= fffffe0000001000 0000007f IDT= fffffe0000000000 00000fff CR0=80050033 CR2=00007f48f1b4c4b0 CR3=0000000017c4e000 CR4=00350ef0 DR0=0000000000000000 DR1=0000000000000000 DR2=0000000000000000 DR3=0000000000000000 DR6=00000000ffff0ff0 DR7=0000000000000400 EFER=0000000000000d01 FCW=037f FSW=0000 [ST=0] FTW=00 MXCSR=00001f80 FPR0=0000000000000000 0000 FPR1=0000000000000000 0000 FPR2=0000000000000000 0000 FPR3=0000000000000000 0000 FPR4=0000000000000000 0000 FPR5=0000000000000000 0000 FPR6=0000000000000000 0000 FPR7=0000000000000000 0000 XMM00=2038313a37303a3431203931206e754a XMM01=6964206465766965636552203a5d3932 XMM02=6f63736964203a31313a323739393320 XMM03=7266207463656e6e6f63736964206465 XMM04=69662068637573206f4e203a656c6163 XMM05=3a656c696620766e65206e65706f206f XMM06=65733a6468737328766e655f6d617020 XMM07=6b7a79732037313a37303a3431203931 XMM08=3d656e696c646d632022656369767265 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=1ffffffff0c09a5a RBX=ffffffff8604d2d0 RCX=ffffffff84506c7e RDX=0000000000000000 RSI=ffffffff864b0222 RDI=ffffffff8604d2b8 RBP=ffffffff8604d2b8 RSP=ffff888017ce75e0 R8 =ffffffff864b0222 R9 =ffff888017ce76d8 R10=0000000000038001 R11=00000000000b4fb9 R12=ffffffff8604d2e8 R13=ffffffff8604d2b8 R14=ffffffff8604d2b8 R15=dffffc0000000000 RIP=ffffffff8112fc7f RFL=00000216 [----AP-] CPL=0 II=0 A20=1 SMM=0 HLT=0 ES =0000 0000000000000000 00000000 00000000 CS =0010 0000000000000000 ffffffff 00a09b00 DPL=0 CS64 [-RA] SS =0018 0000000000000000 ffffffff 00c09300 DPL=0 DS [-WA] DS =0000 0000000000000000 00000000 00000000 FS =0000 00007f40c4b1b900 00000000 00000000 GS =0000 ffff88806cf00000 00000000 00000000 LDT=0000 fffffe0000000000 00000000 00000000 TR =0040 fffffe000004a000 00004087 00008b00 DPL=0 TSS64-busy GDT= fffffe0000048000 0000007f IDT= fffffe0000000000 00000fff CR0=80050033 CR2=00007f40c50d2618 CR3=00000000184e0000 CR4=00350ee0 DR0=0000000000000000 DR1=0000000000000000 DR2=0000000000000000 DR3=0000000000000000 DR6=00000000ffff0ff0 DR7=0000000000000400 EFER=0000000000000d01 FCW=037f FSW=0000 [ST=0] FTW=00 MXCSR=00001f80 FPR0=0000000000000000 0000 FPR1=0000000000000000 0000 FPR2=0000000000000000 0000 FPR3=0000000000000000 0000 FPR4=0000000000000000 0000 FPR5=0000000000000000 0000 FPR6=0000000000000000 0000 FPR7=0000000000000000 0000 XMM00=00000000000000000000000000000000 XMM01=6e69676f6c5f6d61702c78756e696c65 XMM02=755f6d61702c74696d7265705f6d6170 XMM03=2c766e655f6d61702c7374696d696c5f XMM04=6d61702c766e655f6d61702c7374696d XMM05=78696e755f6d61702c74696d7265705f XMM06=6469756e69676f6c5f6d61702c78756e XMM07=672065736f6c635f6e6f69737365733a XMM08=61662029286e65706f5f746964756100 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000