syzkaller login: [ 47.809395] BUG: Bad rss-counter state mm:00000000f7411b3d type:MM_FILEPAGES val:33 [ 47.810465] BUG: Bad rss-counter state mm:00000000f7411b3d type:MM_ANONPAGES val:22 [ 47.847674] ================================================================== [ 47.848613] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 47.849518] Read of size 8 at addr ffff888009d22ed8 by task sshd/226 [ 47.850241] [ 47.850457] CPU: 0 PID: 226 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 47.851263] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 47.852202] Call Trace: [ 47.852503] [ 47.852831] dump_stack_lvl+0x91/0xf0 [ 47.853324] print_report+0xcc/0x620 [ 47.853803] ? __virt_addr_valid+0x102/0x340 [ 47.854356] ? vma_interval_tree_remove+0xc75/0xec0 [ 47.854977] ? vma_interval_tree_remove+0xc75/0xec0 [ 47.855600] kasan_report+0xbe/0xf0 [ 47.856074] ? vma_interval_tree_remove+0xc75/0xec0 [ 47.856736] vma_interval_tree_remove+0xc75/0xec0 [ 47.857351] vma_prepare+0xc54/0x11a0 [ 47.857833] __split_vma+0x5af/0x950 [ 47.858473] ? __pfx___split_vma+0x10/0x10 [ 47.858993] ? find_held_lock+0x2c/0x110 [ 47.859545] do_vmi_align_munmap+0x2ba/0x11f0 [ 47.860101] ? lock_is_held_type+0x9f/0x120 [ 47.860629] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 47.861234] ? mtree_range_walk+0x632/0x900 [ 47.861761] ? mas_walk+0x5c7/0x7c0 [ 47.862212] do_vmi_munmap+0x1f1/0x2b0 [ 47.862677] mmap_region+0x1f9/0x2660 [ 47.863137] ? vm_mmap_pgoff+0x15c/0x3a0 [ 47.863640] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 47.864319] ? __pfx_lock_acquire+0x10/0x10 [ 47.864878] ? __pfx_mmap_region+0x10/0x10 [ 47.865379] ? security_mmap_addr+0x7d/0xa0 [ 47.865887] ? get_unmapped_area+0x1f5/0x3f0 [ 47.866416] do_mmap+0x854/0xf00 [ 47.866855] vm_mmap_pgoff+0x1a6/0x3a0 [ 47.867325] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 47.867876] ksys_mmap_pgoff+0x3af/0x500 [ 47.868362] do_syscall_64+0x3f/0x90 [ 47.868867] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 47.869488] RIP: 0033:0x7ff512bc8d82 [ 47.869917] 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 [ 47.872019] RSP: 002b:00007ffe01fc4368 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 47.872965] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007ff512bc8d82 [ 47.873812] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007ff512002000 [ 47.874662] RBP: 00007ff512002000 R08: 0000000000000009 R09: 0000000000001000 [ 47.875519] R10: 0000000000000812 R11: 0000000000000206 R12: 000055f99eb00f60 [ 47.876371] R13: 00007ffe01fc4380 R14: 00007ffe01fc43b0 R15: 00007ffe01fc4710 [ 47.877271] [ 47.877564] [ 47.877807] Allocated by task 219: [ 47.878238] kasan_save_stack+0x22/0x50 [ 47.878741] kasan_set_track+0x25/0x30 [ 47.879227] __kasan_slab_alloc+0x59/0x70 [ 47.879768] kmem_cache_alloc+0x16b/0x370 [ 47.880275] vm_area_dup+0x20/0x160 [ 47.880726] __split_vma+0x170/0x950 [ 47.881178] split_vma+0xc6/0x110 [ 47.881616] mprotect_fixup+0x8d2/0xb30 [ 47.882154] do_mprotect_pkey+0x87e/0xd40 [ 47.882667] __x64_sys_mprotect+0x78/0xc0 [ 47.883181] do_syscall_64+0x3f/0x90 [ 47.883680] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 47.884313] [ 47.884525] Freed by task 219: [ 47.884915] kasan_save_stack+0x22/0x50 [ 47.885418] kasan_set_track+0x25/0x30 [ 47.885960] kasan_save_free_info+0x2b/0x50 [ 47.886492] __kasan_slab_free+0x10a/0x190 [ 47.887018] kmem_cache_free+0x10d/0x4d0 [ 47.887541] rcu_core+0x8c8/0x2860 [ 47.887988] __do_softirq+0x1b7/0x7d4 [ 47.888462] [ 47.888680] Last potentially related work creation: [ 47.889264] kasan_save_stack+0x22/0x50 [ 47.889807] __kasan_record_aux_stack+0x8e/0xa0 [ 47.890378] __call_rcu_common.constprop.0+0x6a/0xb90 [ 47.891021] remove_vma+0x139/0x170 [ 47.891473] do_vmi_align_munmap+0xd4a/0x11f0 [ 47.892045] do_vmi_munmap+0x1f1/0x2b0 [ 47.892526] __vm_munmap+0x138/0x3a0 [ 47.892990] __x64_sys_munmap+0x59/0x80 [ 47.893481] do_syscall_64+0x3f/0x90 [ 47.893999] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 47.894638] [ 47.894855] The buggy address belongs to the object at ffff888009d22e80 [ 47.894855] which belongs to the cache vm_area_struct of size 168 [ 47.896333] The buggy address is located 88 bytes inside of [ 47.896333] freed 168-byte region [ffff888009d22e80, ffff888009d22f28) [ 47.897764] [ 47.897981] The buggy address belongs to the physical page: [ 47.898612] page:00000000ceb4252c refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x9d22 [ 47.899689] memcg:ffff88800e806d01 [ 47.900094] flags: 0x100000000000200(slab|node=0|zone=1) [ 47.900698] page_type: 0xffffffff() [ 47.901127] raw: 0100000000000200 ffff88800879fc80 ffffea00003995c0 dead000000000008 [ 47.902009] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800e806d01 [ 47.902912] page dumped because: kasan: bad access detected [ 47.903543] [ 47.903748] Memory state around the buggy address: [ 47.904294] ffff888009d22d80: fc fc fc 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 47.905122] ffff888009d22e00: 00 00 00 00 00 00 00 00 fc fc fc fc fc fc fc fc [ 47.905930] >ffff888009d22e80: fa fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 47.906769] ^ [ 47.907455] ffff888009d22f00: fb fb fb fb fb fc fc fc fc fc fc fc fc fc fc fc [ 47.908281] ffff888009d22f80: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc [ 47.909091] ================================================================== [ 47.910208] Disabling lock debugging due to kernel taint [ 49.947647] BUG: Bad rss-counter state mm:0000000040f023b8 type:MM_FILEPAGES val:33 [ 49.948853] BUG: Bad rss-counter state mm:0000000040f023b8 type:MM_ANONPAGES val:22 [ 50.351007] BUG: Bad rss-counter state mm:000000006ea7472e type:MM_FILEPAGES val:33 [ 50.352131] BUG: Bad rss-counter state mm:000000006ea7472e type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:4673' (ECDSA) to the list of known hosts. 2023/06/19 19:52:46 fuzzer started 2023/06/19 19:52:46 dialing manager at localhost:44161 2023/06/19 19:52:46 checking machine... 2023/06/19 19:52:46 checking revisions... [ 51.104706] kmemleak: Automatic memory scanning thread ended 2023/06/19 19:52:46 testing simple program... [ 51.157556] cgroup: Unknown subsys name 'net' [ 51.205103] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 19:52:37 Registers: info registers vcpu 0 RAX=0000000000000000 RBX=0000000000000001 RCX=ffffffff86136d88 RDX=0000000000000000 RSI=0000000000000001 RDI=0000000000000001 RBP=ffff888015c77ae8 RSP=ffff888015c77a20 R8 =ffffffff86136d8c R9 =ffff888015c77ad0 R10=0000000000038001 R11=0000000000020c48 R12=ffff888015c77af0 R13=ffff888015c77ad8 R14=0000000000000014 R15=ffff888015c77a90 RIP=ffffffff81130b17 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 00007fce80129900 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=00007fce7f55e5c0 CR3=000000000ca52000 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=ffffffffffffffffffffffffffffffff XMM01=30306234386136303638616663356134 XMM02=38303062343861363036386166633561 XMM03=2f6c616e72756f6a2f676f6c2f6e7572 XMM04=d703973ee9ef858700000000000ae988 XMM05=c7e6044c5f44836e00000000001350a0 XMM06=13e856d8d71426c80000000000133b20 XMM07=00000000000000000000000000000000 XMM08=415453454d49545f454d49544c414552 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=0000000000000000 RBX=ffff888008f7f000 RCX=0000000000000000 RDX=ffff88800ea751c0 RSI=ffffffff8386d031 RDI=ffff888008f7f4f8 RBP=ffff88800e1bc0b0 RSP=ffff88801c8479e0 R8 =0000000000000001 R9 =0000000000000000 R10=0000000000000000 R11=6873733d6c616e69 R12=ffff888008c78ea0 R13=0000000000000000 R14=dffffc0000000000 R15=ffff888008f7f6b8 RIP=ffffffff8386d04d 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 00007f531d42d900 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=00007ffc8858c000 CR3=000000000f1be000 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=6720646572637465733a4d41503d706f XMM01=652022746f6f72223d74636361207469 XMM02=3d6c616e696d72657420322e322e302e XMM03=3d656d616e74736f682022646873732f XMM04=40404040404040404040404040404040 XMM05=5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a XMM06=20202020202020202020202020202020 XMM07=00000000000000000000000000000000 XMM08=652075253d64692073253d706f000000 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000