syzkaller login: [ 30.581454] BUG: Bad rss-counter state mm:00000000cb7f42d9 type:MM_FILEPAGES val:33 [ 30.583232] BUG: Bad rss-counter state mm:00000000cb7f42d9 type:MM_ANONPAGES val:22 [ 30.742889] ================================================================== [ 30.743851] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 30.744844] Read of size 8 at addr ffff88801a12b4e0 by task sshd/220 [ 30.745674] [ 30.745976] CPU: 0 PID: 220 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 30.746900] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 30.747935] Call Trace: [ 30.748297] [ 30.748601] dump_stack_lvl+0x91/0xf0 [ 30.749113] print_report+0xcc/0x620 [ 30.749652] ? __virt_addr_valid+0x102/0x340 [ 30.750227] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.750870] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.751513] kasan_report+0xbe/0xf0 [ 30.752017] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.752669] vma_interval_tree_remove+0xc75/0xec0 [ 30.753311] vma_prepare+0xc54/0x11a0 [ 30.753832] __split_vma+0x5af/0x950 [ 30.754327] ? __pfx___split_vma+0x10/0x10 [ 30.754878] ? find_held_lock+0x2c/0x110 [ 30.755430] do_vmi_align_munmap+0x2ba/0x11f0 [ 30.756032] ? lock_is_held_type+0x9f/0x120 [ 30.756590] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 30.757231] ? mtree_range_walk+0x632/0x900 [ 30.757827] ? mas_walk+0x5c7/0x7c0 [ 30.758336] do_vmi_munmap+0x1f1/0x2b0 [ 30.758852] mmap_region+0x1f9/0x2660 [ 30.759354] ? vm_mmap_pgoff+0x15c/0x3a0 [ 30.759895] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 30.760662] ? __pfx_lock_acquire+0x10/0x10 [ 30.761231] ? __pfx_mmap_region+0x10/0x10 [ 30.761792] ? security_mmap_addr+0x7d/0xa0 [ 30.762350] ? get_unmapped_area+0x1f5/0x3f0 [ 30.762933] do_mmap+0x854/0xf00 [ 30.763392] vm_mmap_pgoff+0x1a6/0x3a0 [ 30.763912] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 30.764500] ksys_mmap_pgoff+0x3af/0x500 [ 30.765038] do_syscall_64+0x3f/0x90 [ 30.765549] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.766236] RIP: 0033:0x7f62a195ed82 [ 30.766716] 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 [ 30.768975] RSP: 002b:00007ffc0441af28 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 30.769948] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f62a195ed82 [ 30.770853] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f62a0d98000 [ 30.771744] RBP: 00007f62a0d98000 R08: 0000000000000009 R09: 0000000000001000 [ 30.772620] R10: 0000000000000812 R11: 0000000000000206 R12: 000055595a2b6d90 [ 30.773527] R13: 00007ffc0441af40 R14: 00007ffc0441af70 R15: 00007ffc0441b2d0 [ 30.774431] [ 30.774737] [ 30.774962] Allocated by task 213: [ 30.775418] kasan_save_stack+0x22/0x50 [ 30.775944] kasan_set_track+0x25/0x30 [ 30.776452] __kasan_slab_alloc+0x59/0x70 [ 30.777010] kmem_cache_alloc+0x16b/0x370 [ 30.777566] vm_area_dup+0x20/0x160 [ 30.778044] __split_vma+0x170/0x950 [ 30.778530] split_vma+0xc6/0x110 [ 30.778985] mprotect_fixup+0x8d2/0xb30 [ 30.779500] do_mprotect_pkey+0x87e/0xd40 [ 30.780048] __x64_sys_mprotect+0x78/0xc0 [ 30.780588] do_syscall_64+0x3f/0x90 [ 30.781080] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.781765] [ 30.781991] Freed by task 213: [ 30.782396] kasan_save_stack+0x22/0x50 [ 30.782935] kasan_set_track+0x25/0x30 [ 30.783463] kasan_save_free_info+0x2b/0x50 [ 30.784030] __kasan_slab_free+0x10a/0x190 [ 30.784593] kmem_cache_free+0x10d/0x4d0 [ 30.785123] rcu_core+0x8c8/0x2860 [ 30.785603] __do_softirq+0x1b7/0x7d4 [ 30.786093] [ 30.786318] Last potentially related work creation: [ 30.786936] kasan_save_stack+0x22/0x50 [ 30.787469] __kasan_record_aux_stack+0x8e/0xa0 [ 30.788062] __call_rcu_common.constprop.0+0x6a/0xb90 [ 30.788747] remove_vma+0x139/0x170 [ 30.789225] do_vmi_align_munmap+0xd4a/0x11f0 [ 30.789832] do_vmi_munmap+0x1f1/0x2b0 [ 30.790333] __vm_munmap+0x138/0x3a0 [ 30.790816] __x64_sys_munmap+0x59/0x80 [ 30.791336] do_syscall_64+0x3f/0x90 [ 30.791828] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.792495] [ 30.792712] The buggy address belongs to the object at ffff88801a12b488 [ 30.792712] which belongs to the cache vm_area_struct of size 168 [ 30.794279] The buggy address is located 88 bytes inside of [ 30.794279] freed 168-byte region [ffff88801a12b488, ffff88801a12b530) [ 30.795766] [ 30.795988] The buggy address belongs to the physical page: [ 30.796693] page:000000001d03a573 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x1a12b [ 30.797867] memcg:ffff8880165adc01 [ 30.798321] flags: 0x100000000000200(slab|node=0|zone=1) [ 30.799003] page_type: 0xffffffff() [ 30.799472] raw: 0100000000000200 ffff8880087a0c80 dead000000000122 0000000000000000 [ 30.800444] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff8880165adc01 [ 30.801405] page dumped because: kasan: bad access detected [ 30.802097] [ 30.802319] Memory state around the buggy address: [ 30.802924] ffff88801a12b380: fc fc fc fc 00 00 00 00 00 00 00 00 00 00 00 00 [ 30.803844] ffff88801a12b400: 00 00 00 00 00 00 00 00 00 fc fc fc fc fc fc fc [ 30.804767] >ffff88801a12b480: fc fa fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 30.805676] ^ [ 30.806484] ffff88801a12b500: fb fb fb fb fb fb fc fc fc fc fc fc fc fc fa fb [ 30.807375] ffff88801a12b580: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 30.808287] ================================================================== [ 30.809602] Disabling lock debugging due to kernel taint [ 33.356843] BUG: Bad rss-counter state mm:000000002b2024db type:MM_FILEPAGES val:33 [ 33.357833] BUG: Bad rss-counter state mm:000000002b2024db type:MM_ANONPAGES val:22 [ 33.728324] BUG: Bad rss-counter state mm:00000000dc043953 type:MM_FILEPAGES val:33 [ 33.729351] BUG: Bad rss-counter state mm:00000000dc043953 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:32929' (ECDSA) to the list of known hosts. 2023/06/21 01:20:45 fuzzer started 2023/06/21 01:20:45 dialing manager at localhost:36067 2023/06/21 01:20:46 checking machine... 2023/06/21 01:20:46 checking revisions... [ 34.434630] kmemleak: Automatic memory scanning thread ended 2023/06/21 01:20:46 testing simple program... [ 34.481686] cgroup: Unknown subsys name 'net' [ 34.535381] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 01:20:45 Registers: info registers vcpu 0 RAX=0000000000000000 RBX=0000000000000000 RCX=0000000000000000 RDX=0000000000000400 RSI=ffff8880145c0000 RDI=ffff888008442140 RBP=ffff888008442140 RSP=ffff888019ff74d8 R8 =ffff8880145c0000 R9 =0000000000000000 R10=0000000000001000 R11=ffffffff81806f71 R12=ffff8880145c0000 R13=0000000000082cc0 R14=0000000000000000 R15=0000000000000000 RIP=ffffffff81810875 RFL=00000206 [-----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 00007f50073f8900 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=00007f50079af618 CR3=000000000f662000 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=ffffffff8451250e RDX=ffffed100d9e6a01 RSI=0000000000000004 RDI=ffffffff81288ac5 RBP=dffffc0000000000 RSP=ffff888008e07e70 R8 =0000000000000000 R9 =ffffed100d9e6a00 R10=ffff88806cf35003 R11=0000000000000001 R12=ffffffff85d3d350 R13=1ffff110011c0fd3 R14=0000000000000000 R15=0000000000000000 RIP=ffffffff8451349f 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=00007f1ccea46fe8 CR3=000000000cbc4000 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=d8cacea984d8b686814759735c5dbb12 XMM02=000000000011d5f8ec2efd57dc4c00df XMM03=0000000000121d98d31c6bee42e2f704 XMM04=b14cf3d3de12cc0100000000000ae988 XMM05=19e9129bd510f2350000000000131bd8 XMM06=4fda316b135da52b0000000000131a60 XMM07=e042d86d42eb936e0000000000122018 XMM08=d31c6bee42e2f704000000000011d658 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000