syzkaller login: [ 68.314192] BUG: Bad rss-counter state mm:000000000b5396b7 type:MM_FILEPAGES val:33 [ 68.314840] BUG: Bad rss-counter state mm:000000000b5396b7 type:MM_ANONPAGES val:22 [ 68.433358] ================================================================== [ 68.434012] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 68.434718] Read of size 8 at addr ffff88800fb9f310 by task sshd/220 [ 68.435243] [ 68.435392] CPU: 0 PID: 220 Comm: sshd Tainted: G L 6.4.0-rc7-next-20230619 #1 [ 68.436062] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 68.436730] Call Trace: [ 68.436952] [ 68.437156] dump_stack_lvl+0x91/0xf0 [ 68.437498] print_report+0xcc/0x620 [ 68.438009] ? __virt_addr_valid+0x102/0x340 [ 68.438426] ? vma_interval_tree_remove+0xc75/0xec0 [ 68.438863] ? vma_interval_tree_remove+0xc75/0xec0 [ 68.439277] kasan_report+0xbe/0xf0 [ 68.439589] ? vma_interval_tree_remove+0xc75/0xec0 [ 68.440010] vma_interval_tree_remove+0xc75/0xec0 [ 68.440449] vma_prepare+0xc54/0x11a0 [ 68.440815] __split_vma+0x5af/0x950 [ 68.441146] ? __pfx___split_vma+0x10/0x10 [ 68.441513] ? find_held_lock+0x2c/0x110 [ 68.441885] do_vmi_align_munmap+0x2ba/0x11f0 [ 68.442266] ? lock_is_held_type+0x9f/0x120 [ 68.442643] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 68.443043] ? mtree_range_walk+0x632/0x900 [ 68.443415] ? mas_walk+0x5c7/0x7c0 [ 68.443733] do_vmi_munmap+0x1f1/0x2b0 [ 68.444066] mmap_region+0x1f9/0x2660 [ 68.444398] ? vm_mmap_pgoff+0x15c/0x3a0 [ 68.444852] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 68.445349] ? __pfx_lock_acquire+0x10/0x10 [ 68.445714] ? __pfx_mmap_region+0x10/0x10 [ 68.446065] ? security_mmap_addr+0x7d/0xa0 [ 68.446426] ? get_unmapped_area+0x1f5/0x3f0 [ 68.446795] do_mmap+0x854/0xf00 [ 68.447097] vm_mmap_pgoff+0x1a6/0x3a0 [ 68.447435] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 68.447821] ksys_mmap_pgoff+0x3af/0x500 [ 68.448171] do_syscall_64+0x3f/0x90 [ 68.448498] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 68.448979] RIP: 0033:0x7fcef3017d82 [ 68.449288] 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 [ 68.450748] RSP: 002b:00007fff7406fc68 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 68.451363] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007fcef3017d82 [ 68.451940] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007fcef2451000 [ 68.452569] RBP: 00007fcef2451000 R08: 0000000000000009 R09: 0000000000001000 [ 68.453157] R10: 0000000000000812 R11: 0000000000000206 R12: 0000564e3fd2cec0 [ 68.453757] R13: 00007fff7406fc80 R14: 00007fff7406fcb0 R15: 00007fff74070010 [ 68.454351] [ 68.454557] [ 68.454707] Allocated by task 213: [ 68.455004] kasan_save_stack+0x22/0x50 [ 68.455377] kasan_set_track+0x25/0x30 [ 68.455772] __kasan_slab_alloc+0x59/0x70 [ 68.456148] kmem_cache_alloc+0x16b/0x370 [ 68.456504] vm_area_dup+0x20/0x160 [ 68.456871] __split_vma+0x170/0x950 [ 68.457173] split_vma+0xc6/0x110 [ 68.457457] mprotect_fixup+0x8d2/0xb30 [ 68.457801] do_mprotect_pkey+0x87e/0xd40 [ 68.458162] __x64_sys_mprotect+0x78/0xc0 [ 68.458541] do_syscall_64+0x3f/0x90 [ 68.458879] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 68.459310] [ 68.459454] Freed by task 213: [ 68.459717] kasan_save_stack+0x22/0x50 [ 68.460058] kasan_set_track+0x25/0x30 [ 68.460386] kasan_save_free_info+0x2b/0x50 [ 68.460792] __kasan_slab_free+0x10a/0x190 [ 68.461150] kmem_cache_free+0x10d/0x4d0 [ 68.461489] rcu_core+0x8c8/0x2860 [ 68.461834] __do_softirq+0x1b7/0x7d4 [ 68.462194] [ 68.462342] Last potentially related work creation: [ 68.462736] kasan_save_stack+0x22/0x50 [ 68.463073] __kasan_record_aux_stack+0x8e/0xa0 [ 68.463451] __call_rcu_common.constprop.0+0x6a/0xb90 [ 68.463870] remove_vma+0x139/0x170 [ 68.464179] do_vmi_align_munmap+0xd4a/0x11f0 [ 68.464617] do_vmi_munmap+0x1f1/0x2b0 [ 68.464969] __vm_munmap+0x138/0x3a0 [ 68.465335] __x64_sys_munmap+0x59/0x80 [ 68.465728] do_syscall_64+0x3f/0x90 [ 68.466056] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 68.466493] [ 68.466640] The buggy address belongs to the object at ffff88800fb9f2b8 [ 68.466640] which belongs to the cache vm_area_struct of size 168 [ 68.467625] The buggy address is located 88 bytes inside of [ 68.467625] freed 168-byte region [ffff88800fb9f2b8, ffff88800fb9f360) [ 68.468646] [ 68.468817] The buggy address belongs to the physical page: [ 68.469304] page:0000000075455858 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xfb9f [ 68.470033] memcg:ffff88800c497301 [ 68.470334] flags: 0x100000000000200(slab|node=0|zone=1) [ 68.470757] page_type: 0xffffffff() [ 68.471068] raw: 0100000000000200 ffff88800879fc80 dead000000000122 0000000000000000 [ 68.471689] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800c497301 [ 68.472313] page dumped because: kasan: bad access detected [ 68.472852] [ 68.473003] Memory state around the buggy address: [ 68.473393] ffff88800fb9f200: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 fc [ 68.473972] ffff88800fb9f280: fc fc fc fc fc fc fc fa fb fb fb fb fb fb fb fb [ 68.474531] >ffff88800fb9f300: fb fb fb fb fb fb fb fb fb fb fb fb fc fc fc fc [ 68.475096] ^ [ 68.475413] ffff88800fb9f380: fc fc fc fc fa fb fb fb fb fb fb fb fb fb fb fb [ 68.476039] ffff88800fb9f400: fb fb fb fb fb fb fb fb fb fc fc fc fc fc fc fc [ 68.476693] ================================================================== [ 68.477581] Disabling lock debugging due to kernel taint [ 70.025399] BUG: Bad rss-counter state mm:00000000747e4ae7 type:MM_FILEPAGES val:33 [ 70.026461] BUG: Bad rss-counter state mm:00000000747e4ae7 type:MM_ANONPAGES val:22 [ 70.359266] BUG: Bad rss-counter state mm:0000000037f62e62 type:MM_FILEPAGES val:33 [ 70.360015] BUG: Bad rss-counter state mm:0000000037f62e62 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:7571' (ECDSA) to the list of known hosts. 2023/06/20 09:05:08 fuzzer started 2023/06/20 09:05:08 dialing manager at localhost:44161 2023/06/20 09:05:08 checking machine... 2023/06/20 09:05:08 checking revisions... [ 70.978720] kmemleak: Automatic memory scanning thread ended 2023/06/20 09:05:08 testing simple program... [ 71.014443] cgroup: Unknown subsys name 'net' [ 71.046915] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 09:04:30 Registers: info registers vcpu 0 RAX=dffffc0000000000 RBX=ffff8880147876b8 RCX=ffffffff81132ffe RDX=ffff888014787648 RSI=0000000000000000 RDI=ffff888014787690 RBP=ffff88800f8b3680 RSP=ffff8880147875d0 R8 =0000000000000001 R9 =0000000000000000 R10=ffff888014787620 R11=00000000000b6c88 R12=ffff888014787640 R13=ffff888014787648 R14=ffff888014787668 R15=ffff888014787620 RIP=ffffffff81132eda 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 =0000 0000000000000000 00000000 00000000 DS =0000 0000000000000000 00000000 00000000 FS =0000 00007f047f974900 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=00007f047ed86970 CR3=000000000d6b0000 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=656e6e6f637369443d4547415353454d XMM01=2e303120746f6f722072657375206d6f XMM02=ffffffffffffffffffffffffffffffff XMM03=2f6c616e72756f6a2f676f6c2f6e7572 XMM04=0a94357e9dfa656300000000000ae988 XMM05=9497759830b512aa00000000001395b0 XMM06=4fda316b135da52b0000000000138650 XMM07=00000000000000000000000000000000 XMM08=415453454d49545f454d49544c414552 XMM09=00000000000000000000000000000000 XMM10=20200000000020202020202020200000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=0000000000000001 RBX=0000000000000002 RCX=ffff88801c9d8000 RDX=ffff88801c9d7b01 RSI=0000000000000001 RDI=ffff88806cf09a88 RBP=ffff88806cf09ad0 RSP=ffff88806cf099f0 R8 =0000000000000000 R9 =ffff88806cf09ab8 R10=0000000000038001 R11=00000000000b523e R12=ffff88806cf09ad8 R13=ffff88801c9d0000 R14=ffff88801c9d8000 R15=ffff88806cf09a78 RIP=ffffffff811304d1 RFL=00000286 [--S--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 00007fed875a8900 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=00007ffed2f33000 CR3=0000000019cb2000 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=ffffffffffffffffffff000000000000 XMM01=000000000000003635006b6f6c6c756e XMM02=62003d73646e756f7200323135616873 XMM03=5320444f4854454d5f54505952434e45 XMM04=40404040404040404040404040404040 XMM05=5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a XMM06=20202020202020202020202020202020 XMM07=00000000000000000000000000000000 XMM08=00000000000000000000000000202020 XMM09=ff0000ffffffffffff00000000ffffff XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000