syzkaller login: [ 35.768281] BUG: Bad rss-counter state mm:00000000c8666db1 type:MM_FILEPAGES val:33 [ 35.769727] BUG: Bad rss-counter state mm:00000000c8666db1 type:MM_ANONPAGES val:22 [ 35.939354] ================================================================== [ 35.940420] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 35.941539] Read of size 8 at addr ffff888016577880 by task sshd/219 [ 35.942594] [ 35.942854] CPU: 1 PID: 219 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 35.943877] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 35.945132] Call Trace: [ 35.945531] [ 35.945876] dump_stack_lvl+0x91/0xf0 [ 35.946460] print_report+0xcc/0x620 [ 35.947057] ? __virt_addr_valid+0x102/0x340 [ 35.947715] ? vma_interval_tree_remove+0xc75/0xec0 [ 35.948445] ? vma_interval_tree_remove+0xc75/0xec0 [ 35.949174] kasan_report+0xbe/0xf0 [ 35.949754] ? vma_interval_tree_remove+0xc75/0xec0 [ 35.950495] vma_interval_tree_remove+0xc75/0xec0 [ 35.951211] vma_prepare+0xc54/0x11a0 [ 35.951777] __split_vma+0x5af/0x950 [ 35.952346] ? __pfx___split_vma+0x10/0x10 [ 35.952978] ? find_held_lock+0x2c/0x110 [ 35.953641] do_vmi_align_munmap+0x2ba/0x11f0 [ 35.954267] ? lock_is_held_type+0x9f/0x120 [ 35.954830] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 35.955467] ? mtree_range_walk+0x632/0x900 [ 35.956048] ? mas_walk+0x5c7/0x7c0 [ 35.956547] do_vmi_munmap+0x1f1/0x2b0 [ 35.957063] mmap_region+0x1f9/0x2660 [ 35.957574] ? vm_mmap_pgoff+0x15c/0x3a0 [ 35.958111] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 35.958858] ? __pfx_lock_acquire+0x10/0x10 [ 35.959412] ? __pfx_mmap_region+0x10/0x10 [ 35.959968] ? security_mmap_addr+0x7d/0xa0 [ 35.960526] ? get_unmapped_area+0x1f5/0x3f0 [ 35.961105] do_mmap+0x854/0xf00 [ 35.961578] vm_mmap_pgoff+0x1a6/0x3a0 [ 35.962102] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 35.962692] ksys_mmap_pgoff+0x3af/0x500 [ 35.963230] do_syscall_64+0x3f/0x90 [ 35.963730] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 35.964408] RIP: 0033:0x7f1973fbdd82 [ 35.964887] 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 [ 35.967175] RSP: 002b:00007ffd3cd7c778 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 35.968127] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f1973fbdd82 [ 35.969036] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f19733f7000 [ 35.969958] RBP: 00007f19733f7000 R08: 0000000000000009 R09: 0000000000001000 [ 35.970850] R10: 0000000000000812 R11: 0000000000000206 R12: 0000557837692f70 [ 35.971757] R13: 00007ffd3cd7c790 R14: 00007ffd3cd7c7c0 R15: 00007ffd3cd7cb20 [ 35.972664] [ 35.972977] [ 35.973202] Allocated by task 212: [ 35.973666] kasan_save_stack+0x22/0x50 [ 35.974201] kasan_set_track+0x25/0x30 [ 35.974724] __kasan_slab_alloc+0x59/0x70 [ 35.975277] kmem_cache_alloc+0x16b/0x370 [ 35.975825] vm_area_dup+0x20/0x160 [ 35.976307] __split_vma+0x170/0x950 [ 35.976790] split_vma+0xc6/0x110 [ 35.977254] mprotect_fixup+0x8d2/0xb30 [ 35.977803] do_mprotect_pkey+0x87e/0xd40 [ 35.978347] __x64_sys_mprotect+0x78/0xc0 [ 35.978888] do_syscall_64+0x3f/0x90 [ 35.979394] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 35.980081] [ 35.980304] Freed by task 212: [ 35.980708] kasan_save_stack+0x22/0x50 [ 35.981244] kasan_set_track+0x25/0x30 [ 35.981781] kasan_save_free_info+0x2b/0x50 [ 35.982345] __kasan_slab_free+0x10a/0x190 [ 35.982904] kmem_cache_free+0x10d/0x4d0 [ 35.983519] rcu_core+0x8c8/0x2860 [ 35.983991] __do_softirq+0x1b7/0x7d4 [ 35.984492] [ 35.984720] Last potentially related work creation: [ 35.985346] kasan_save_stack+0x22/0x50 [ 35.985903] __kasan_record_aux_stack+0x8e/0xa0 [ 35.986503] __call_rcu_common.constprop.0+0x6a/0xb90 [ 35.987176] remove_vma+0x139/0x170 [ 35.987655] do_vmi_align_munmap+0xd4a/0x11f0 [ 35.988241] do_vmi_munmap+0x1f1/0x2b0 [ 35.988745] __vm_munmap+0x138/0x3a0 [ 35.989231] __x64_sys_munmap+0x59/0x80 [ 35.989763] do_syscall_64+0x3f/0x90 [ 35.990261] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 35.990930] [ 35.991155] The buggy address belongs to the object at ffff888016577828 [ 35.991155] which belongs to the cache vm_area_struct of size 168 [ 35.992719] The buggy address is located 88 bytes inside of [ 35.992719] freed 168-byte region [ffff888016577828, ffff8880165778d0) [ 35.994246] [ 35.994467] The buggy address belongs to the physical page: [ 35.995172] page:00000000da9675b3 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x16577 [ 35.996332] memcg:ffff88800e06e501 [ 35.996784] anon flags: 0x100000000000200(slab|node=0|zone=1) [ 35.997528] page_type: 0xffffffff() [ 35.998000] raw: 0100000000000200 ffff8880087a0c80 ffffea0000628380 dead000000000005 [ 35.998970] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800e06e501 [ 35.999938] page dumped because: kasan: bad access detected [ 36.000627] [ 36.000853] Memory state around the buggy address: [ 36.001474] ffff888016577780: 00 00 00 00 00 00 00 00 00 00 00 00 00 fc fc fc [ 36.002406] ffff888016577800: fc fc fc fc fc fa fb fb fb fb fb fb fb fb fb fb [ 36.003314] >ffff888016577880: fb fb fb fb fb fb fb fb fb fb fc fc fc fc fc fc [ 36.004226] ^ [ 36.004653] ffff888016577900: fc fc fa fb fb fb fb fb fb fb fb fb fb fb fb fb [ 36.005577] ffff888016577980: fb fb fb fb fb fb fb fc fc fc fc fc fc fc fc 00 [ 36.006493] ================================================================== [ 36.007576] Disabling lock debugging due to kernel taint [ 38.027041] BUG: Bad rss-counter state mm:000000000ae6a2b2 type:MM_FILEPAGES val:33 [ 38.028474] BUG: Bad rss-counter state mm:000000000ae6a2b2 type:MM_ANONPAGES val:22 [ 38.622157] BUG: Bad rss-counter state mm:0000000073b74a42 type:MM_FILEPAGES val:33 [ 38.623502] BUG: Bad rss-counter state mm:0000000073b74a42 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:15687' (ECDSA) to the list of known hosts. 2023/06/21 02:49:33 fuzzer started 2023/06/21 02:49:33 dialing manager at localhost:36067 2023/06/21 02:49:33 checking machine... 2023/06/21 02:49:33 checking revisions... [ 39.279090] kmemleak: Automatic memory scanning thread ended 2023/06/21 02:49:33 testing simple program... [ 39.334522] cgroup: Unknown subsys name 'net' [ 39.401810] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 02:49:33 Registers: info registers vcpu 0 RAX=dffffc0000000000 RBX=ffff888018b77800 RCX=0000000000000001 RDX=1ffff1100316ef02 RSI=ffff888018b77da0 RDI=ffff888018b77810 RBP=ffff888018b77da0 RSP=ffff888018b77758 R8 =0000000000000001 R9 =ffff888018b77840 R10=0000000000038001 R11=0000000000023906 R12=0000000000000008 R13=ffff888018b70000 R14=ffff888018b77da0 R15=ffff888018b77800 RIP=ffffffff8113046e 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 00007f840c62b900 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=00007f840cbe30b0 CR3=000000000dde0000 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=000000000000000000000000000000ff XMM02=000000000000000000000000000000ff XMM03=5320444f4854454d5f54505952434e45 XMM04=40404040404040404040404040404040 XMM05=5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a XMM06=20202020202020202020202020202020 XMM07=00000000000000000000000000000000 XMM08=ffbc64ffffbc44ffffbc34ffffbc9f00 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=0000000000000001 RBX=ffffffff813ad470 RCX=ffffffff86138e01 RDX=ffff888008e37cb0 RSI=0000000000000000 RDI=ffff888008e37968 RBP=ffff888008e379f0 RSP=ffff888008e37958 R8 =ffffffff86138e90 R9 =ffff888008e37998 R10=0000000000038001 R11=0000000000020d8f R12=ffff888008e37a20 R13=0000000000000000 R14=ffff888008e0d1c0 R15=ffff88800dc24d80 RIP=ffffffff810bd057 RFL=00000292 [--S-A--] 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=00007fa4c42d8f40 CR3=000000000c686000 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=15d1323e65d4c99900000000000ae988 XMM05=e940e02d0b04d1c10000000000133200 XMM06=dfcdbad4f1609c370000000000131d28 XMM07=00000000000000000000000000000000 XMM08=415453454d49545f454d49544c414552 XMM09=00000000000000000000000000000000 XMM10=20200000000020202020202020200000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000