syzkaller login: [ 30.750666] BUG: Bad rss-counter state mm:000000002e0dc67b type:MM_FILEPAGES val:33 [ 30.752487] BUG: Bad rss-counter state mm:000000002e0dc67b type:MM_ANONPAGES val:22 [ 30.943817] ================================================================== [ 30.945001] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 30.946093] Read of size 8 at addr ffff88800ee54a50 by task sshd/219 [ 30.946994] [ 30.947247] CPU: 0 PID: 219 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 30.948243] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 30.949417] Call Trace: [ 30.949822] [ 30.950180] dump_stack_lvl+0x91/0xf0 [ 30.950780] print_report+0xcc/0x620 [ 30.951377] ? __virt_addr_valid+0x102/0x340 [ 30.952054] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.952808] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.953594] kasan_report+0xbe/0xf0 [ 30.954180] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.954945] vma_interval_tree_remove+0xc75/0xec0 [ 30.955710] vma_prepare+0xc54/0x11a0 [ 30.956287] __split_vma+0x5af/0x950 [ 30.956862] ? __pfx___split_vma+0x10/0x10 [ 30.957516] ? find_held_lock+0x2c/0x110 [ 30.958164] do_vmi_align_munmap+0x2ba/0x11f0 [ 30.958882] ? lock_is_held_type+0x9f/0x120 [ 30.959597] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 30.960390] ? mtree_range_walk+0x632/0x900 [ 30.961111] ? mas_walk+0x5c7/0x7c0 [ 30.961734] do_vmi_munmap+0x1f1/0x2b0 [ 30.962380] mmap_region+0x1f9/0x2660 [ 30.962992] ? vm_mmap_pgoff+0x15c/0x3a0 [ 30.963646] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 30.964561] ? __pfx_lock_acquire+0x10/0x10 [ 30.965263] ? __pfx_mmap_region+0x10/0x10 [ 30.965933] ? security_mmap_addr+0x7d/0xa0 [ 30.966595] ? get_unmapped_area+0x1f5/0x3f0 [ 30.967274] do_mmap+0x854/0xf00 [ 30.967818] vm_mmap_pgoff+0x1a6/0x3a0 [ 30.968428] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 30.969148] ksys_mmap_pgoff+0x3af/0x500 [ 30.969776] do_syscall_64+0x3f/0x90 [ 30.970381] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.971188] RIP: 0033:0x7f7355fe5d82 [ 30.971763] 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 [ 30.974466] RSP: 002b:00007ffc879f1eb8 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 30.975603] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f7355fe5d82 [ 30.976646] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f735541f000 [ 30.977720] RBP: 00007f735541f000 R08: 0000000000000009 R09: 0000000000001000 [ 30.978762] R10: 0000000000000812 R11: 0000000000000206 R12: 000055e55a8a0d90 [ 30.979818] R13: 00007ffc879f1ed0 R14: 00007ffc879f1f00 R15: 00007ffc879f2260 [ 30.980877] [ 30.981253] [ 30.981528] Allocated by task 212: [ 30.982065] kasan_save_stack+0x22/0x50 [ 30.982699] kasan_set_track+0x25/0x30 [ 30.983313] __kasan_slab_alloc+0x59/0x70 [ 30.983985] kmem_cache_alloc+0x16b/0x370 [ 30.984641] vm_area_dup+0x20/0x160 [ 30.985221] __split_vma+0x170/0x950 [ 30.985806] split_vma+0xc6/0x110 [ 30.986348] mprotect_fixup+0x8d2/0xb30 [ 30.986980] do_mprotect_pkey+0x87e/0xd40 [ 30.987638] __x64_sys_mprotect+0x78/0xc0 [ 30.988289] do_syscall_64+0x3f/0x90 [ 30.988887] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.989714] [ 30.989991] Freed by task 13: [ 30.990475] kasan_save_stack+0x22/0x50 [ 30.991116] kasan_set_track+0x25/0x30 [ 30.991741] kasan_save_free_info+0x2b/0x50 [ 30.992399] __kasan_slab_free+0x10a/0x190 [ 30.993083] kmem_cache_free+0x10d/0x4d0 [ 30.993709] rcu_core+0x8c8/0x2860 [ 30.994267] __do_softirq+0x1b7/0x7d4 [ 30.994872] [ 30.995141] Last potentially related work creation: [ 30.995862] kasan_save_stack+0x22/0x50 [ 30.996484] __kasan_record_aux_stack+0x8e/0xa0 [ 30.997202] __call_rcu_common.constprop.0+0x6a/0xb90 [ 30.997991] remove_vma+0x139/0x170 [ 30.998544] do_vmi_align_munmap+0xd4a/0x11f0 [ 30.999226] do_vmi_munmap+0x1f1/0x2b0 [ 30.999820] __vm_munmap+0x138/0x3a0 [ 31.000398] __x64_sys_munmap+0x59/0x80 [ 31.001038] do_syscall_64+0x3f/0x90 [ 31.001625] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.002416] [ 31.002685] The buggy address belongs to the object at ffff88800ee549f8 [ 31.002685] which belongs to the cache vm_area_struct of size 168 [ 31.004493] The buggy address is located 88 bytes inside of [ 31.004493] freed 168-byte region [ffff88800ee549f8, ffff88800ee54aa0) [ 31.006245] [ 31.006516] The buggy address belongs to the physical page: [ 31.007333] page:0000000047319de5 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xee54 [ 31.008683] memcg:ffff88800ce3c901 [ 31.009221] flags: 0x100000000000200(slab|node=0|zone=1) [ 31.010023] page_type: 0xffffffff() [ 31.010582] raw: 0100000000000200 ffff88800879fc80 dead000000000122 0000000000000000 [ 31.011716] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800ce3c901 [ 31.012838] page dumped because: kasan: bad access detected [ 31.013682] [ 31.013946] Memory state around the buggy address: [ 31.014664] ffff88800ee54900: fc fc 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 31.015718] ffff88800ee54980: 00 00 00 00 00 00 00 fc fc fc fc fc fc fc fc fa [ 31.016772] >ffff88800ee54a00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 31.017845] ^ [ 31.018710] ffff88800ee54a80: fb fb fb fb fc fc fc fc fc fc fc fc fa fb fb fb [ 31.019763] ffff88800ee54b00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 31.020816] ================================================================== [ 31.022179] Disabling lock debugging due to kernel taint [ 33.108771] BUG: Bad rss-counter state mm:00000000a720d1e8 type:MM_FILEPAGES val:33 [ 33.110089] BUG: Bad rss-counter state mm:00000000a720d1e8 type:MM_ANONPAGES val:22 [ 33.514779] BUG: Bad rss-counter state mm:0000000071bb6b50 type:MM_FILEPAGES val:33 [ 33.515801] BUG: Bad rss-counter state mm:0000000071bb6b50 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:29128' (ECDSA) to the list of known hosts. 2023/06/19 18:18:44 fuzzer started 2023/06/19 18:18:44 dialing manager at localhost:44161 2023/06/19 18:18:44 checking machine... 2023/06/19 18:18:44 checking revisions... [ 34.265855] kmemleak: Automatic memory scanning thread ended 2023/06/19 18:18:45 testing simple program... [ 34.319143] cgroup: Unknown subsys name 'net' [ 34.357250] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 18:18:43 Registers: info registers vcpu 0 RAX=dffffc0000000000 RBX=0000000000000000 RCX=0000000000000000 RDX=ffff8880142651c0 RSI=ffffffff81716ac4 RDI=ffffffff8560b640 RBP=00007f9988052280 RSP=ffff88800da8fd20 R8 =0000000000000005 R9 =0000000000000000 R10=0000000000000000 R11=0000000000000000 R12=ffffffff8560b640 R13=ffffffff81716ac4 R14=0000000000000040 R15=ffff88800f11b780 RIP=ffffffff812d862e RFL=00000282 [--S----] 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 =0000 0000000000000000 00000000 00000000 DS =0000 0000000000000000 00000000 00000000 FS =0000 00007f9988c32900 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=00007f9988052280 CR3=000000000ca8a000 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=454d49544c4145525f454352554f535f XMM01=3d504d415453454d49545f454d49544c XMM02=ffffffffffffffffffffffffffffffff XMM03=2f6c616e72756f6a2f676f6c2f6e7572 XMM04=6776f577b8f1581b00000000000ae988 XMM05=9c41ce381f2fc3d40000000000134d50 XMM06=9ea594877667b81d0000000000133af0 XMM07=00000000000000000000000000000000 XMM08=415453454d49545f454d49544c414552 XMM09=00000000000000000000000000000000 XMM10=20200000000020202020202020200000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=dffffc0000000000 RBX=ffffffff8186bd0b RCX=0000000000000001 RDX=1ffff1100d9e1355 RSI=ffff888017a6fe90 RDI=ffffffff8186bd0b RBP=ffffffff8186bd0b RSP=ffff88806cf09a00 R8 =0000000000000001 R9 =ffff88806cf09a90 R10=0000000000038001 R11=0000000000009755 R12=0000000000000001 R13=0000000000000000 R14=ffff888017b2b680 R15=ffff88800d9fed00 RIP=ffffffff811fc772 RFL=00000283 [--S---C] 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 00007ffb5744c900 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=00007ffc08002000 CR3=00000000096e8000 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=635f6e6f69737365733a4d41503d706f XMM01=6f6c5f6d61702c78756e696c65735f6d XMM02=61702c74696d7265705f6d61702c7469 XMM03=655f6d61702c7374696d696c5f6d6170 XMM04=3d6c616e696d72657420322e322e302e XMM05=3d656d616e74736f682022646873732f XMM06=746f6f72223d746363612078756e696c XMM07=6e655f6d61702c7374696d696c5f6d61 XMM08=652075253d64692073253d706f000000 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000