syzkaller login: [ 31.420171] BUG: Bad rss-counter state mm:00000000f52b17a2 type:MM_FILEPAGES val:33 [ 31.421360] BUG: Bad rss-counter state mm:00000000f52b17a2 type:MM_ANONPAGES val:22 [ 31.458903] ================================================================== [ 31.459869] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 31.460815] Read of size 8 at addr ffff8880168db4e0 by task sshd/221 [ 31.461594] [ 31.461811] CPU: 0 PID: 221 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 31.462675] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 31.463648] Call Trace: [ 31.463970] [ 31.464258] dump_stack_lvl+0x91/0xf0 [ 31.464751] print_report+0xcc/0x620 [ 31.465243] ? __virt_addr_valid+0x102/0x340 [ 31.465826] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.466448] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.467069] kasan_report+0xbe/0xf0 [ 31.467542] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.468160] vma_interval_tree_remove+0xc75/0xec0 [ 31.468789] vma_prepare+0xc54/0x11a0 [ 31.469288] __split_vma+0x5af/0x950 [ 31.469794] ? __pfx___split_vma+0x10/0x10 [ 31.470345] ? find_held_lock+0x2c/0x110 [ 31.470888] do_vmi_align_munmap+0x2ba/0x11f0 [ 31.471481] ? lock_is_held_type+0x9f/0x120 [ 31.472043] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 31.472676] ? mtree_range_walk+0x632/0x900 [ 31.473252] ? mas_walk+0x5c7/0x7c0 [ 31.473757] do_vmi_munmap+0x1f1/0x2b0 [ 31.474263] mmap_region+0x1f9/0x2660 [ 31.474763] ? vm_mmap_pgoff+0x15c/0x3a0 [ 31.475294] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 31.476041] ? __pfx_lock_acquire+0x10/0x10 [ 31.476605] ? __pfx_mmap_region+0x10/0x10 [ 31.477160] ? security_mmap_addr+0x7d/0xa0 [ 31.477732] ? get_unmapped_area+0x1f5/0x3f0 [ 31.478296] do_mmap+0x854/0xf00 [ 31.478747] vm_mmap_pgoff+0x1a6/0x3a0 [ 31.479262] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 31.479847] ksys_mmap_pgoff+0x3af/0x500 [ 31.480374] do_syscall_64+0x3f/0x90 [ 31.480873] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.481559] RIP: 0033:0x7fc3a2fd5d82 [ 31.482028] 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 [ 31.484237] RSP: 002b:00007fff9b127458 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 31.485184] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007fc3a2fd5d82 [ 31.486066] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007fc3a240f000 [ 31.487070] RBP: 00007fc3a240f000 R08: 0000000000000009 R09: 0000000000001000 [ 31.487919] R10: 0000000000000812 R11: 0000000000000206 R12: 000055ea3ab7bec0 [ 31.488775] R13: 00007fff9b127470 R14: 00007fff9b1274a0 R15: 00007fff9b127800 [ 31.489645] [ 31.489941] [ 31.490159] Allocated by task 214: [ 31.490589] kasan_save_stack+0x22/0x50 [ 31.491093] kasan_set_track+0x25/0x30 [ 31.491587] __kasan_slab_alloc+0x59/0x70 [ 31.492116] kmem_cache_alloc+0x16b/0x370 [ 31.492628] vm_area_dup+0x20/0x160 [ 31.493084] __split_vma+0x170/0x950 [ 31.493569] split_vma+0xc6/0x110 [ 31.494016] mprotect_fixup+0x8d2/0xb30 [ 31.494538] do_mprotect_pkey+0x87e/0xd40 [ 31.495065] __x64_sys_mprotect+0x78/0xc0 [ 31.495581] do_syscall_64+0x3f/0x90 [ 31.496056] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.496701] [ 31.496917] Freed by task 214: [ 31.497307] kasan_save_stack+0x22/0x50 [ 31.497817] kasan_set_track+0x25/0x30 [ 31.498308] kasan_save_free_info+0x2b/0x50 [ 31.498838] __kasan_slab_free+0x10a/0x190 [ 31.499368] kmem_cache_free+0x10d/0x4d0 [ 31.499871] rcu_core+0x8c8/0x2860 [ 31.500311] __do_softirq+0x1b7/0x7d4 [ 31.500790] [ 31.501010] Last potentially related work creation: [ 31.501606] kasan_save_stack+0x22/0x50 [ 31.502110] __kasan_record_aux_stack+0x8e/0xa0 [ 31.502683] __call_rcu_common.constprop.0+0x6a/0xb90 [ 31.503316] remove_vma+0x139/0x170 [ 31.503762] do_vmi_align_munmap+0xd4a/0x11f0 [ 31.504321] do_vmi_munmap+0x1f1/0x2b0 [ 31.504802] __vm_munmap+0x138/0x3a0 [ 31.505271] __x64_sys_munmap+0x59/0x80 [ 31.505770] do_syscall_64+0x3f/0x90 [ 31.506242] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.506879] [ 31.507095] The buggy address belongs to the object at ffff8880168db488 [ 31.507095] which belongs to the cache vm_area_struct of size 168 [ 31.508548] The buggy address is located 88 bytes inside of [ 31.508548] freed 168-byte region [ffff8880168db488, ffff8880168db530) [ 31.509950] [ 31.510162] The buggy address belongs to the physical page: [ 31.510821] page:00000000ab076c38 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x168db [ 31.511916] memcg:ffff88800e5ff001 [ 31.512340] anon flags: 0x100000000000200(slab|node=0|zone=1) [ 31.513053] page_type: 0xffffffff() [ 31.513505] raw: 0100000000000200 ffff8880087a0c80 ffffea000037b780 dead000000000005 [ 31.514443] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800e5ff001 [ 31.515347] page dumped because: kasan: bad access detected [ 31.516007] [ 31.516222] Memory state around the buggy address: [ 31.516800] ffff8880168db380: fc fc fc fc fa fb fb fb fb fb fb fb fb fb fb fb [ 31.517656] ffff8880168db400: fb fb fb fb fb fb fb fb fb fc fc fc fc fc fc fc [ 31.518516] >ffff8880168db480: fc fa fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 31.519363] ^ [ 31.520110] ffff8880168db500: fb fb fb fb fb fb fc fc fc fc fc fc fc fc 00 00 [ 31.520960] ffff8880168db580: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 31.521852] ================================================================== [ 31.522960] Disabling lock debugging due to kernel taint [ 33.351114] BUG: Bad rss-counter state mm:000000000aa7ebe6 type:MM_FILEPAGES val:33 [ 33.351810] BUG: Bad rss-counter state mm:000000000aa7ebe6 type:MM_ANONPAGES val:22 [ 33.819171] BUG: Bad rss-counter state mm:0000000045006c3b type:MM_FILEPAGES val:33 [ 33.820253] BUG: Bad rss-counter state mm:0000000045006c3b type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:20684' (ECDSA) to the list of known hosts. 2023/06/21 02:38:32 fuzzer started 2023/06/21 02:38:32 dialing manager at localhost:36067 2023/06/21 02:38:32 checking machine... 2023/06/21 02:38:32 checking revisions... [ 34.575096] kmemleak: Automatic memory scanning thread ended 2023/06/21 02:38:32 testing simple program... [ 34.626438] cgroup: Unknown subsys name 'net' [ 34.666646] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 02:38:32 Registers: info registers vcpu 0 RAX=dffffc0000000000 RBX=ffff8880167afb68 RCX=ffffffff86138e01 RDX=1ffff11002cf5f7c RSI=ffffffff8180effe RDI=ffff8880167afb74 RBP=ffff8880167afbe0 RSP=ffff8880167afa80 R8 =ffffffff86138e90 R9 =ffff8880167afae0 R10=0000000000038001 R11=0000000000020d8f R12=ffff8880167afb68 R13=0000000000000000 R14=ffff888019fd51c0 R15=dffffc0000000000 RIP=ffffffff813ad549 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 00007f7f4d4ba900 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=00007f7f4da720b0 CR3=000000000d876000 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=ffffffffffffffffffffffff00000000 XMM01=000000000000000000005600746f6f72 XMM02=00000000000000000000000000000000 XMM03=5320444f4854454d5f54505952434e45 XMM04=40404040404040404040404040404040 XMM05=5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a XMM06=20202020202020202020202020202020 XMM07=00000000000000000000000000000000 XMM08=2f3a746f6f723a303a303a3a746f6f72 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=0000000000038000 RBX=0000000000000001 RCX=ffffffff84537da6 RDX=dffffc0000000000 RSI=000000000003537d RDI=ffff888008e37950 RBP=ffff888008e379a8 RSP=ffff888008e378e0 R8 =0000000000000001 R9 =ffff888008e37990 R10=0000000000038001 R11=000000000000fdcc R12=ffff888008e379b0 R13=ffff888008e37998 R14=ffff888008e37991 R15=ffff888008e37950 RIP=ffffffff81130754 RFL=00000287 [--S--PC] 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=00007f3e67c7a0b0 CR3=000000000cd6e000 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=ffffffffffffffffffffffffffffffff XMM01=30306234386136303638616663356134 XMM02=38303062343861363036386166633561 XMM03=2f6c616e72756f6a2f676f6c2f6e7572 XMM04=df12122a35bd0d0600000000000ae988 XMM05=4bd344a847da76ec0000000000132c40 XMM06=e4cb8bb95a7664b60000000000131ad8 XMM07=00000000000000000000000000000000 XMM08=415453454d49545f454d49544c414552 XMM09=00000000000000000000000000000000 XMM10=20200000000020202020202020200000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000