syzkaller login: [ 87.590115] BUG: Bad rss-counter state mm:000000003b15112d type:MM_FILEPAGES val:33 [ 87.591388] BUG: Bad rss-counter state mm:000000003b15112d type:MM_ANONPAGES val:22 [ 87.765235] ================================================================== [ 87.766299] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 87.767431] Read of size 8 at addr ffff888016bcf228 by task sshd/220 [ 87.768158] [ 87.768367] CPU: 0 PID: 220 Comm: sshd Tainted: G L 6.4.0-rc7-next-20230619 #1 [ 87.769345] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 87.770262] Call Trace: [ 87.770562] [ 87.770833] dump_stack_lvl+0x91/0xf0 [ 87.771295] print_report+0xcc/0x620 [ 87.771766] ? __virt_addr_valid+0x102/0x340 [ 87.772293] ? vma_interval_tree_remove+0xc75/0xec0 [ 87.772873] ? vma_interval_tree_remove+0xc75/0xec0 [ 87.773454] kasan_report+0xbe/0xf0 [ 87.773905] ? vma_interval_tree_remove+0xc75/0xec0 [ 87.774492] vma_interval_tree_remove+0xc75/0xec0 [ 87.775067] vma_prepare+0xc54/0x11a0 [ 87.775604] __split_vma+0x5af/0x950 [ 87.776157] ? __pfx___split_vma+0x10/0x10 [ 87.776773] ? find_held_lock+0x2c/0x110 [ 87.777381] do_vmi_align_munmap+0x2ba/0x11f0 [ 87.778038] ? lock_is_held_type+0x9f/0x120 [ 87.778666] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 87.779372] ? mtree_range_walk+0x632/0x900 [ 87.780029] ? mas_walk+0x5c7/0x7c0 [ 87.780579] do_vmi_munmap+0x1f1/0x2b0 [ 87.781157] mmap_region+0x1f9/0x2660 [ 87.781723] ? vm_mmap_pgoff+0x15c/0x3a0 [ 87.782316] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 87.783146] ? __pfx_lock_acquire+0x10/0x10 [ 87.783790] ? __pfx_mmap_region+0x10/0x10 [ 87.784410] ? security_mmap_addr+0x7d/0xa0 [ 87.785026] ? get_unmapped_area+0x1f5/0x3f0 [ 87.785662] do_mmap+0x854/0xf00 [ 87.786171] vm_mmap_pgoff+0x1a6/0x3a0 [ 87.786747] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 87.787398] ksys_mmap_pgoff+0x3af/0x500 [ 87.788001] do_syscall_64+0x3f/0x90 [ 87.788557] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 87.789305] RIP: 0033:0x7fc05ed5fd82 [ 87.789838] 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 [ 87.792337] RSP: 002b:00007ffcc27f46f8 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 87.793388] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007fc05ed5fd82 [ 87.794377] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007fc05e199000 [ 87.795363] RBP: 00007fc05e199000 R08: 0000000000000009 R09: 0000000000001000 [ 87.796379] R10: 0000000000000812 R11: 0000000000000206 R12: 00005621106f0f70 [ 87.797364] R13: 00007ffcc27f4710 R14: 00007ffcc27f4740 R15: 00007ffcc27f4aa0 [ 87.798367] [ 87.798691] [ 87.798937] Allocated by task 213: [ 87.799425] kasan_save_stack+0x22/0x50 [ 87.799998] kasan_set_track+0x25/0x30 [ 87.800557] __kasan_slab_alloc+0x59/0x70 [ 87.801147] kmem_cache_alloc+0x16b/0x370 [ 87.801727] vm_area_dup+0x20/0x160 [ 87.802250] __split_vma+0x170/0x950 [ 87.802780] split_vma+0xc6/0x110 [ 87.803269] mprotect_fixup+0x8d2/0xb30 [ 87.803836] do_mprotect_pkey+0x87e/0xd40 [ 87.804422] __x64_sys_mprotect+0x78/0xc0 [ 87.805000] do_syscall_64+0x3f/0x90 [ 87.805524] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 87.806244] [ 87.806490] Freed by task 213: [ 87.806932] kasan_save_stack+0x22/0x50 [ 87.807517] kasan_set_track+0x25/0x30 [ 87.808097] kasan_save_free_info+0x2b/0x50 [ 87.808657] __kasan_slab_free+0x10a/0x190 [ 87.809188] kmem_cache_free+0x10d/0x4d0 [ 87.809700] rcu_core+0x8c8/0x2860 [ 87.810151] __do_softirq+0x1b7/0x7d4 [ 87.810632] [ 87.810847] Last potentially related work creation: [ 87.811442] kasan_save_stack+0x22/0x50 [ 87.811949] __kasan_record_aux_stack+0x8e/0xa0 [ 87.812529] __call_rcu_common.constprop.0+0x6a/0xb90 [ 87.813169] remove_vma+0x139/0x170 [ 87.813621] do_vmi_align_munmap+0xd4a/0x11f0 [ 87.814182] do_vmi_munmap+0x1f1/0x2b0 [ 87.814670] __vm_munmap+0x138/0x3a0 [ 87.815135] __x64_sys_munmap+0x59/0x80 [ 87.815657] do_syscall_64+0x3f/0x90 [ 87.816136] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 87.816778] [ 87.816994] The buggy address belongs to the object at ffff888016bcf1d0 [ 87.816994] which belongs to the cache vm_area_struct of size 168 [ 87.818476] The buggy address is located 88 bytes inside of [ 87.818476] freed 168-byte region [ffff888016bcf1d0, ffff888016bcf278) [ 87.819922] [ 87.820138] The buggy address belongs to the physical page: [ 87.820795] page:00000000d993fe5d refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x16bcf [ 87.821902] memcg:ffff88800fdb6801 [ 87.822331] flags: 0x100000000000200(slab|node=0|zone=1) [ 87.822994] page_type: 0xffffffff() [ 87.823457] raw: 0100000000000200 ffff88800879fc80 dead000000000122 0000000000000000 [ 87.824376] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800fdb6801 [ 87.825292] page dumped because: kasan: bad access detected [ 87.825960] [ 87.826176] Memory state around the buggy address: [ 87.826759] ffff888016bcf100: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 87.827626] ffff888016bcf180: 00 00 fc fc fc fc fc fc fc fc fa fb fb fb fb fb [ 87.828489] >ffff888016bcf200: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fc [ 87.829344] ^ [ 87.829904] ffff888016bcf280: fc fc fc fc fc fc fc fa fb fb fb fb fb fb fb fb [ 87.830760] ffff888016bcf300: fb fb fb fb fb fb fb fb fb fb fb fb fc fc fc fc [ 87.831634] ================================================================== [ 87.833152] Disabling lock debugging due to kernel taint [ 89.723237] BUG: Bad rss-counter state mm:000000000e3cd2b1 type:MM_FILEPAGES val:33 [ 89.724286] BUG: Bad rss-counter state mm:000000000e3cd2b1 type:MM_ANONPAGES val:22 [ 90.154772] BUG: Bad rss-counter state mm:00000000742af37d type:MM_FILEPAGES val:33 [ 90.155802] BUG: Bad rss-counter state mm:00000000742af37d type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:52598' (ECDSA) to the list of known hosts. 2023/06/19 15:16:51 fuzzer started 2023/06/19 15:16:52 dialing manager at localhost:44161 2023/06/19 15:16:52 checking machine... 2023/06/19 15:16:52 checking revisions... [ 90.856047] kmemleak: Automatic memory scanning thread ended 2023/06/19 15:16:52 testing simple program... [ 90.898657] cgroup: Unknown subsys name 'net' [ 90.936757] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 15:15:55 Registers: info registers vcpu 0 RAX=dffffc0000000000 RBX=0000000000000001 RCX=0000000000000001 RDX=1ffff11001f71f2a RSI=ffffffff81808777 RDI=ffff88800fb8f8f8 RBP=ffff88800fb8f950 RSP=ffff88800fb8f888 R8 =0000000000000001 R9 =ffff88800fb8f938 R10=0000000000038001 R11=0000000000021edf R12=ffff88800fb8f9c0 R13=0000000000000000 R14=ffff888016451b40 R15=ffff88800fb8f8f8 RIP=ffffffff8113062c 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 00007f57581f0900 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=00007f57587a7618 CR3=000000000e1cc000 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=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 info registers vcpu 1 RAX=ffff88806cf35000 RBX=0000000000000001 RCX=ffffffff8450c50e RDX=ffffed100d9e6a01 RSI=0000000000000004 RDI=ffffffff812889a5 RBP=dffffc0000000000 RSP=ffff888008e27e70 R8 =0000000000000000 R9 =ffffed100d9e6a00 R10=ffff88806cf35003 R11=0000000000000001 R12=ffffffff85d3bed0 R13=1ffff110011c4fd3 R14=0000000000000000 R15=0000000000000000 RIP=ffffffff8450d49f RFL=00000246 [---Z-P-] CPL=0 II=0 A20=1 SMM=0 HLT=1 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=00007f57587a80b0 CR3=000000000e1cc000 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=36313a3531203931206e754a3e36383c XMM01=7365733a646873732878696e755f6d61 XMM02=736f6c63206e6f6973736573203a296e XMM03=5f6d6170203a5d3932325b6468737320 XMM04=6456774875434142334f726f59427469 XMM05=485320415352203a3268737320343231 XMM06=206d6f726620746f6f7220726f662079 XMM07=00000000000000000000000000000000 XMM08=3a677562656420676f6c737973720000 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000