syzkaller login: [ 23.719691] BUG: Bad rss-counter state mm:00000000b41cabfa type:MM_FILEPAGES val:33 [ 23.720697] BUG: Bad rss-counter state mm:00000000b41cabfa type:MM_ANONPAGES val:22 [ 23.879079] ================================================================== [ 23.880003] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 23.880937] Read of size 8 at addr ffff888016ef25c8 by task sshd/219 [ 23.881704] [ 23.881922] CPU: 0 PID: 219 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 23.882894] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 23.883877] Call Trace: [ 23.884202] [ 23.884486] dump_stack_lvl+0x91/0xf0 [ 23.885002] print_report+0xcc/0x620 [ 23.885486] ? __virt_addr_valid+0x102/0x340 [ 23.886043] ? vma_interval_tree_remove+0xc75/0xec0 [ 23.886686] ? vma_interval_tree_remove+0xc75/0xec0 [ 23.887302] kasan_report+0xbe/0xf0 [ 23.887781] ? vma_interval_tree_remove+0xc75/0xec0 [ 23.888416] vma_interval_tree_remove+0xc75/0xec0 [ 23.889034] vma_prepare+0xc54/0x11a0 [ 23.889509] __split_vma+0x5af/0x950 [ 23.889978] ? __pfx___split_vma+0x10/0x10 [ 23.890517] ? find_held_lock+0x2c/0x110 [ 23.891030] do_vmi_align_munmap+0x2ba/0x11f0 [ 23.891589] ? lock_is_held_type+0x9f/0x120 [ 23.892123] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 23.892727] ? mtree_range_walk+0x632/0x900 [ 23.893274] ? mas_walk+0x5c7/0x7c0 [ 23.893749] do_vmi_munmap+0x1f1/0x2b0 [ 23.894258] mmap_region+0x1f9/0x2660 [ 23.894755] ? vm_mmap_pgoff+0x15c/0x3a0 [ 23.895262] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 23.895964] ? __pfx_lock_acquire+0x10/0x10 [ 23.896487] ? __pfx_mmap_region+0x10/0x10 [ 23.897014] ? security_mmap_addr+0x7d/0xa0 [ 23.897546] ? get_unmapped_area+0x1f5/0x3f0 [ 23.898103] do_mmap+0x854/0xf00 [ 23.898564] vm_mmap_pgoff+0x1a6/0x3a0 [ 23.899052] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 23.899604] ksys_mmap_pgoff+0x3af/0x500 [ 23.900108] do_syscall_64+0x3f/0x90 [ 23.900596] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 23.901238] RIP: 0033:0x7f9a4ab2cd82 [ 23.901692] 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 [ 23.903830] RSP: 002b:00007ffc9e9832e8 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 23.904726] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f9a4ab2cd82 [ 23.905568] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f9a49f66000 [ 23.906376] RBP: 00007f9a49f66000 R08: 0000000000000009 R09: 0000000000001000 [ 23.907168] R10: 0000000000000812 R11: 0000000000000206 R12: 0000562d775a4ec0 [ 23.907969] R13: 00007ffc9e983300 R14: 00007ffc9e983330 R15: 00007ffc9e983690 [ 23.908771] [ 23.909046] [ 23.909251] Allocated by task 212: [ 23.909655] kasan_save_stack+0x22/0x50 [ 23.910135] kasan_set_track+0x25/0x30 [ 23.910626] __kasan_slab_alloc+0x59/0x70 [ 23.911131] kmem_cache_alloc+0x16b/0x370 [ 23.911652] vm_area_dup+0x20/0x160 [ 23.912108] __split_vma+0x170/0x950 [ 23.912570] split_vma+0xc6/0x110 [ 23.913012] mprotect_fixup+0x8d2/0xb30 [ 23.913503] do_mprotect_pkey+0x87e/0xd40 [ 23.914022] __x64_sys_mprotect+0x78/0xc0 [ 23.914551] do_syscall_64+0x3f/0x90 [ 23.915021] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 23.915657] [ 23.915873] Freed by task 210: [ 23.916252] kasan_save_stack+0x22/0x50 [ 23.916752] kasan_set_track+0x25/0x30 [ 23.917246] kasan_save_free_info+0x2b/0x50 [ 23.917774] __kasan_slab_free+0x10a/0x190 [ 23.918326] kmem_cache_free+0x10d/0x4d0 [ 23.918840] rcu_core+0x8c8/0x2860 [ 23.919283] __do_softirq+0x1b7/0x7d4 [ 23.919762] [ 23.919974] Last potentially related work creation: [ 23.920556] kasan_save_stack+0x22/0x50 [ 23.921050] __kasan_record_aux_stack+0x8e/0xa0 [ 23.921618] __call_rcu_common.constprop.0+0x6a/0xb90 [ 23.922261] remove_vma+0x139/0x170 [ 23.922713] do_vmi_align_munmap+0xd4a/0x11f0 [ 23.923264] do_vmi_munmap+0x1f1/0x2b0 [ 23.923751] __vm_munmap+0x138/0x3a0 [ 23.924212] __x64_sys_munmap+0x59/0x80 [ 23.924704] do_syscall_64+0x3f/0x90 [ 23.925173] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 23.925809] [ 23.926027] The buggy address belongs to the object at ffff888016ef2570 [ 23.926027] which belongs to the cache vm_area_struct of size 168 [ 23.927497] The buggy address is located 88 bytes inside of [ 23.927497] freed 168-byte region [ffff888016ef2570, ffff888016ef2618) [ 23.928898] [ 23.929110] The buggy address belongs to the physical page: [ 23.929760] page:00000000fe569e11 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x16ef2 [ 23.930864] memcg:ffff88800dac6701 [ 23.931289] anon flags: 0x100000000000200(slab|node=0|zone=1) [ 23.931972] page_type: 0xffffffff() [ 23.932412] raw: 0100000000000200 ffff8880087a0c80 ffffea0000389ac0 dead000000000005 [ 23.933315] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800dac6701 [ 23.934225] page dumped because: kasan: bad access detected [ 23.934885] [ 23.935104] Memory state around the buggy address: [ 23.935678] ffff888016ef2480: fc fa fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 23.936527] ffff888016ef2500: fb fb fb fb fb fb fc fc fc fc fc fc fc fc fa fb [ 23.937374] >ffff888016ef2580: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 23.938236] ^ [ 23.938908] ffff888016ef2600: fb fb fb fc fc fc fc fc fc fc fc fa fb fb fb fb [ 23.939766] ffff888016ef2680: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 23.940607] ================================================================== [ 23.941893] Disabling lock debugging due to kernel taint [ 25.901367] BUG: Bad rss-counter state mm:000000005bd31dc8 type:MM_FILEPAGES val:33 [ 25.902601] BUG: Bad rss-counter state mm:000000005bd31dc8 type:MM_ANONPAGES val:22 [ 26.345472] BUG: Bad rss-counter state mm:000000007eb7b87f type:MM_FILEPAGES val:33 [ 26.346701] BUG: Bad rss-counter state mm:000000007eb7b87f type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:2913' (ECDSA) to the list of known hosts. 2023/06/20 19:55:07 fuzzer started 2023/06/20 19:55:08 dialing manager at localhost:36067 2023/06/20 19:55:08 checking machine... 2023/06/20 19:55:08 checking revisions... [ 27.012089] kmemleak: Automatic memory scanning thread ended 2023/06/20 19:55:08 testing simple program... [ 27.052512] cgroup: Unknown subsys name 'net' [ 27.104335] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 19:55:07 Registers: info registers vcpu 0 RAX=0000000000000001 RBX=ffffffff813ad470 RCX=0000000000000001 RDX=ffff88800ec3f838 RSI=ffff88800ec3f818 RDI=ffff88800ec3f400 RBP=ffff88800ec38000 RSP=ffff88800ec3f3c0 R8 =0000000000000001 R9 =ffff88800ec3f430 R10=0000000000038001 R11=000000000008b92e R12=ffff88800ec3f450 R13=ffff88800ec3f438 R14=ffff88800ec3f818 R15=ffff88800ec3f3f0 RIP=ffffffff81130930 RFL=00000286 [--S--P-] 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 00007f12e35b9900 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=00007f12e3b70618 CR3=000000000eed8000 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=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 info registers vcpu 1 RAX=ffffffff8118ddc3 RBX=0000000000000002 RCX=0000000000000001 RDX=ffff88806cf09ac0 RSI=ffffffff8118ddc3 RDI=ffff88806cf09a78 RBP=ffff88806cf09ad0 RSP=ffff88806cf09a08 R8 =0000000000000001 R9 =ffff88806cf09ab8 R10=0000000000038001 R11=00000000000b5d59 R12=ffff88806cf09b40 R13=ffff88806cf09ac0 R14=ffff888008d951c0 R15=ffff88806cf09a78 RIP=ffffffff81130641 RFL=00000246 [---Z-P-] 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 0000000000000000 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=00007fca1e7e57c0 CR3=000000000d5ec000 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=6bf98da6697eedad5947b51635a843ba XMM02=000000000011fcd0eff9b2d0a8fce9cb XMM03=000000000011fda02c67c8bc2e329bc3 XMM04=2758bee53a75916d00000000000ae988 XMM05=dfcdbad4f1609c370000000000132230 XMM06=b1ee899a7544b8740000000000131408 XMM07=e042d86d42eb936e0000000000122630 XMM08=93e36113c8a2dbca000000000011fda0 XMM09=00000000000000000000000000000000 XMM10=20200000000020202020202020200000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000