syzkaller login: [ 30.616434] BUG: Bad rss-counter state mm:000000007691b1c4 type:MM_FILEPAGES val:33 [ 30.618593] BUG: Bad rss-counter state mm:000000007691b1c4 type:MM_ANONPAGES val:22 [ 30.802152] ================================================================== [ 30.803069] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 30.804135] Read of size 8 at addr ffff88800f0b5798 by task sshd/219 [ 30.804915] [ 30.805137] CPU: 0 PID: 219 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 30.805999] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 30.806993] Call Trace: [ 30.807321] [ 30.807606] dump_stack_lvl+0x91/0xf0 [ 30.808096] print_report+0xcc/0x620 [ 30.808580] ? __virt_addr_valid+0x102/0x340 [ 30.809144] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.809775] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.810421] kasan_report+0xbe/0xf0 [ 30.810915] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.811568] vma_interval_tree_remove+0xc75/0xec0 [ 30.812193] vma_prepare+0xc54/0x11a0 [ 30.812691] __split_vma+0x5af/0x950 [ 30.813215] ? __pfx___split_vma+0x10/0x10 [ 30.813771] ? find_held_lock+0x2c/0x110 [ 30.814318] do_vmi_align_munmap+0x2ba/0x11f0 [ 30.814905] ? lock_is_held_type+0x9f/0x120 [ 30.815473] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 30.816099] ? mtree_range_walk+0x632/0x900 [ 30.816677] ? mas_walk+0x5c7/0x7c0 [ 30.817185] do_vmi_munmap+0x1f1/0x2b0 [ 30.817694] mmap_region+0x1f9/0x2660 [ 30.818189] ? vm_mmap_pgoff+0x15c/0x3a0 [ 30.818720] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 30.819462] ? __pfx_lock_acquire+0x10/0x10 [ 30.820009] ? __pfx_mmap_region+0x10/0x10 [ 30.820557] ? security_mmap_addr+0x7d/0xa0 [ 30.821119] ? get_unmapped_area+0x1f5/0x3f0 [ 30.821685] do_mmap+0x854/0xf00 [ 30.822143] vm_mmap_pgoff+0x1a6/0x3a0 [ 30.822654] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 30.823229] ksys_mmap_pgoff+0x3af/0x500 [ 30.823758] do_syscall_64+0x3f/0x90 [ 30.824251] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.824942] RIP: 0033:0x7fa2f255fd82 [ 30.825412] 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 [ 30.827606] RSP: 002b:00007ffcb3115d18 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 30.828734] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007fa2f255fd82 [ 30.829820] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007fa2f1999000 [ 30.830888] RBP: 00007fa2f1999000 R08: 0000000000000009 R09: 0000000000001000 [ 30.831937] R10: 0000000000000812 R11: 0000000000000206 R12: 0000565300d7ef70 [ 30.833015] R13: 00007ffcb3115d30 R14: 00007ffcb3115d60 R15: 00007ffcb31160c0 [ 30.834074] [ 30.834437] [ 30.834702] Allocated by task 212: [ 30.835220] kasan_save_stack+0x22/0x50 [ 30.835850] kasan_set_track+0x25/0x30 [ 30.836477] __kasan_slab_alloc+0x59/0x70 [ 30.837137] kmem_cache_alloc+0x16b/0x370 [ 30.837777] vm_area_dup+0x20/0x160 [ 30.838350] __split_vma+0x170/0x950 [ 30.838943] split_vma+0xc6/0x110 [ 30.839481] mprotect_fixup+0x8d2/0xb30 [ 30.840097] do_mprotect_pkey+0x87e/0xd40 [ 30.840734] __x64_sys_mprotect+0x78/0xc0 [ 30.841384] do_syscall_64+0x3f/0x90 [ 30.841970] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.842735] [ 30.842978] Freed by task 202: [ 30.843430] kasan_save_stack+0x22/0x50 [ 30.843998] kasan_set_track+0x25/0x30 [ 30.844570] kasan_save_free_info+0x2b/0x50 [ 30.845175] __kasan_slab_free+0x10a/0x190 [ 30.845789] kmem_cache_free+0x10d/0x4d0 [ 30.846359] rcu_core+0x8c8/0x2860 [ 30.846864] __do_softirq+0x1b7/0x7d4 [ 30.847398] [ 30.847647] Last potentially related work creation: [ 30.848307] kasan_save_stack+0x22/0x50 [ 30.848882] __kasan_record_aux_stack+0x8e/0xa0 [ 30.849562] __call_rcu_common.constprop.0+0x6a/0xb90 [ 30.850318] remove_vma+0x139/0x170 [ 30.850839] do_vmi_align_munmap+0xd4a/0x11f0 [ 30.851494] do_vmi_munmap+0x1f1/0x2b0 [ 30.852036] __vm_munmap+0x138/0x3a0 [ 30.852564] __x64_sys_munmap+0x59/0x80 [ 30.853147] do_syscall_64+0x3f/0x90 [ 30.853686] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.854421] [ 30.854662] The buggy address belongs to the object at ffff88800f0b5740 [ 30.854662] which belongs to the cache vm_area_struct of size 168 [ 30.856363] The buggy address is located 88 bytes inside of [ 30.856363] freed 168-byte region [ffff88800f0b5740, ffff88800f0b57e8) [ 30.858040] [ 30.858299] The buggy address belongs to the physical page: [ 30.859056] page:00000000538daf1a refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xf0b5 [ 30.860279] memcg:ffff88800b9d0101 [ 30.860764] flags: 0x100000000000200(slab|node=0|zone=1) [ 30.861497] page_type: 0xffffffff() [ 30.862013] raw: 0100000000000200 ffff8880087a0c80 dead000000000122 0000000000000000 [ 30.863052] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800b9d0101 [ 30.864078] page dumped because: kasan: bad access detected [ 30.864845] [ 30.865098] Memory state around the buggy address: [ 30.865758] ffff88800f0b5680: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 30.866734] ffff88800f0b5700: fc fc fc fc fc fc fc fc fa fb fb fb fb fb fb fb [ 30.867709] >ffff88800f0b5780: fb fb fb fb fb fb fb fb fb fb fb fb fb fc fc fc [ 30.868711] ^ [ 30.869306] ffff88800f0b5800: fc fc fc fc fc fa fb fb fb fb fb fb fb fb fb fb [ 30.870336] ffff88800f0b5880: fb fb fb fb fb fb fb fb fb fb fc fc fc fc fc fc [ 30.871358] ================================================================== [ 30.872694] Disabling lock debugging due to kernel taint [ 32.824528] BUG: Bad rss-counter state mm:00000000658b2ca1 type:MM_FILEPAGES val:33 [ 32.825523] BUG: Bad rss-counter state mm:00000000658b2ca1 type:MM_ANONPAGES val:22 [ 33.317902] BUG: Bad rss-counter state mm:00000000f50de271 type:MM_FILEPAGES val:33 [ 33.318994] BUG: Bad rss-counter state mm:00000000f50de271 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:51428' (ECDSA) to the list of known hosts. 2023/06/20 12:05:12 fuzzer started 2023/06/20 12:05:12 dialing manager at localhost:36067 2023/06/20 12:05:12 checking machine... 2023/06/20 12:05:12 checking revisions... [ 34.057006] kmemleak: Automatic memory scanning thread ended 2023/06/20 12:05:12 testing simple program... [ 34.116110] cgroup: Unknown subsys name 'net' [ 34.158907] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 12:05:12 Registers: info registers vcpu 0 RAX=1ffffffff0bbfb97 RBX=ffffffff85dfdcb8 RCX=ffffffff81809a90 RDX=0000000000000000 RSI=ffffffff86138976 RDI=ffffffff85dfdcb8 RBP=ffffffff85dfdcb8 RSP=ffff888008d9f898 R8 =ffffffff86138976 R9 =ffff888008d9f990 R10=0000000000038001 R11=0000000000020cbd R12=ffffffff85dfdcb8 R13=ffffffff85dfdcb8 R14=ffffffff85dfdcb8 R15=dffffc0000000000 RIP=ffffffff8112fc7f RFL=00000212 [----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 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=00007f16660fb0b0 CR3=0000000014574000 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=35303a3231203032206e754a3e36383c XMM01=7365733a646873732878696e755f6d61 XMM02=736f6c63206e6f6973736573203a296e XMM03=5f6d6170203a5d3832325b6468737320 XMM04=6456774875434142334f726f59427469 XMM05=485320415352203a3268737320383531 XMM06=206d6f726620746f6f7220726f662079 XMM07=00000000000000000000000000000000 XMM08=3a677562656420676f6c737973720000 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=0000000000000000 RBX=ffffffff87b7de20 RCX=ffffffff817f5f29 RDX=ffff88800fdb9b40 RSI=0000000000000001 RDI=0000000000000005 RBP=0000000000000001 RSP=ffff88801026fac0 R8 =0000000000000005 R9 =0000000000000002 R10=0000000000000001 R11=00000000000b6a61 R12=0000000000092c40 R13=0000000000000000 R14=0000000000000000 R15=00000000ffffffff RIP=ffffffff814c0408 RFL=00000293 [--S-A-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 00007f1665b43900 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=00007f16660fa618 CR3=000000000e992000 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=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