syzkaller login: [ 38.707823] BUG: Bad rss-counter state mm:00000000a13f5cc1 type:MM_FILEPAGES val:33 [ 38.709153] BUG: Bad rss-counter state mm:00000000a13f5cc1 type:MM_ANONPAGES val:22 [ 38.838451] ================================================================== [ 38.839631] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 38.841056] Read of size 8 at addr ffff888010104d08 by task sshd/221 [ 38.842106] [ 38.842379] CPU: 1 PID: 221 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 38.843357] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 38.844452] Call Trace: [ 38.844809] [ 38.845128] dump_stack_lvl+0x91/0xf0 [ 38.845684] print_report+0xcc/0x620 [ 38.846224] ? __virt_addr_valid+0x102/0x340 [ 38.846861] ? vma_interval_tree_remove+0xc75/0xec0 [ 38.847561] ? vma_interval_tree_remove+0xc75/0xec0 [ 38.848257] kasan_report+0xbe/0xf0 [ 38.848794] ? vma_interval_tree_remove+0xc75/0xec0 [ 38.849511] vma_interval_tree_remove+0xc75/0xec0 [ 38.850193] vma_prepare+0xc54/0x11a0 [ 38.850738] __split_vma+0x5af/0x950 [ 38.851277] ? __pfx___split_vma+0x10/0x10 [ 38.851883] ? find_held_lock+0x2c/0x110 [ 38.852471] do_vmi_align_munmap+0x2ba/0x11f0 [ 38.853120] ? lock_is_held_type+0x9f/0x120 [ 38.853754] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 38.854451] ? mtree_range_walk+0x632/0x900 [ 38.855074] ? mas_walk+0x5c7/0x7c0 [ 38.855607] do_vmi_munmap+0x1f1/0x2b0 [ 38.856160] mmap_region+0x1f9/0x2660 [ 38.856705] ? vm_mmap_pgoff+0x15c/0x3a0 [ 38.857288] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 38.858084] ? __pfx_lock_acquire+0x10/0x10 [ 38.858684] ? __pfx_mmap_region+0x10/0x10 [ 38.859277] ? security_mmap_addr+0x7d/0xa0 [ 38.859868] ? get_unmapped_area+0x1f5/0x3f0 [ 38.860483] do_mmap+0x854/0xf00 [ 38.860976] vm_mmap_pgoff+0x1a6/0x3a0 [ 38.861545] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 38.862182] ksys_mmap_pgoff+0x3af/0x500 [ 38.862713] do_syscall_64+0x3f/0x90 [ 38.863203] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 38.863856] RIP: 0033:0x7fea04a73d82 [ 38.864312] 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 [ 38.866494] RSP: 002b:00007ffd30d2eb58 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 38.867420] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007fea04a73d82 [ 38.868284] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007fea03ead000 [ 38.869137] RBP: 00007fea03ead000 R08: 0000000000000009 R09: 0000000000001000 [ 38.869989] R10: 0000000000000812 R11: 0000000000000206 R12: 000055ca04ac1d90 [ 38.870831] R13: 00007ffd30d2eb70 R14: 00007ffd30d2eba0 R15: 00007ffd30d2ef00 [ 38.871692] [ 38.871984] [ 38.872199] Allocated by task 214: [ 38.872637] kasan_save_stack+0x22/0x50 [ 38.873142] kasan_set_track+0x25/0x30 [ 38.873665] __kasan_slab_alloc+0x59/0x70 [ 38.874196] kmem_cache_alloc+0x16b/0x370 [ 38.874733] vm_area_dup+0x20/0x160 [ 38.875193] __split_vma+0x170/0x950 [ 38.875667] split_vma+0xc6/0x110 [ 38.876112] mprotect_fixup+0x8d2/0xb30 [ 38.876619] do_mprotect_pkey+0x87e/0xd40 [ 38.877142] __x64_sys_mprotect+0x78/0xc0 [ 38.877677] do_syscall_64+0x3f/0x90 [ 38.878151] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 38.878803] [ 38.879017] Freed by task 204: [ 38.879427] kasan_save_stack+0x22/0x50 [ 38.879931] kasan_set_track+0x25/0x30 [ 38.880484] kasan_save_free_info+0x2b/0x50 [ 38.881036] __kasan_slab_free+0x10a/0x190 [ 38.881595] kmem_cache_free+0x10d/0x4d0 [ 38.882109] rcu_core+0x8c8/0x2860 [ 38.882556] __do_softirq+0x1b7/0x7d4 [ 38.883037] [ 38.883253] Last potentially related work creation: [ 38.883842] kasan_save_stack+0x22/0x50 [ 38.884359] __kasan_record_aux_stack+0x8e/0xa0 [ 38.884957] __call_rcu_common.constprop.0+0x6a/0xb90 [ 38.885624] remove_vma+0x139/0x170 [ 38.886078] do_vmi_align_munmap+0xd4a/0x11f0 [ 38.886646] do_vmi_munmap+0x1f1/0x2b0 [ 38.887145] __vm_munmap+0x138/0x3a0 [ 38.887618] __x64_sys_munmap+0x59/0x80 [ 38.888113] do_syscall_64+0x3f/0x90 [ 38.888593] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 38.889247] [ 38.889475] The buggy address belongs to the object at ffff888010104cb0 [ 38.889475] which belongs to the cache vm_area_struct of size 168 [ 38.890981] The buggy address is located 88 bytes inside of [ 38.890981] freed 168-byte region [ffff888010104cb0, ffff888010104d58) [ 38.892426] [ 38.892645] The buggy address belongs to the physical page: [ 38.893346] page:000000007fbc36b0 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x10104 [ 38.894455] memcg:ffff88801678e501 [ 38.894881] flags: 0x100000000000200(slab|node=0|zone=1) [ 38.895544] page_type: 0xffffffff() [ 38.896013] raw: 0100000000000200 ffff8880087a0c80 dead000000000122 0000000000000000 [ 38.896939] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88801678e501 [ 38.897860] page dumped because: kasan: bad access detected [ 38.898550] [ 38.898765] Memory state around the buggy address: [ 38.899358] ffff888010104c00: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 fc fc [ 38.900236] ffff888010104c80: fc fc fc fc fc fc fa fb fb fb fb fb fb fb fb fb [ 38.901106] >ffff888010104d00: fb fb fb fb fb fb fb fb fb fb fb fc fc fc fc fc [ 38.902000] ^ [ 38.902448] ffff888010104d80: fc fc fc fa fb fb fb fb fb fb fb fb fb fb fb fb [ 38.903324] ffff888010104e00: fb fb fb fb fb fb fb fb fc fc fc fc fc fc fc fc [ 38.904175] ================================================================== [ 38.905226] Disabling lock debugging due to kernel taint [ 40.816076] BUG: Bad rss-counter state mm:000000005569f5a4 type:MM_FILEPAGES val:33 [ 40.816834] BUG: Bad rss-counter state mm:000000005569f5a4 type:MM_ANONPAGES val:22 [ 41.218126] BUG: Bad rss-counter state mm:00000000acc8367c type:MM_FILEPAGES val:33 [ 41.218782] BUG: Bad rss-counter state mm:00000000acc8367c type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:50679' (ECDSA) to the list of known hosts. 2023/06/20 22:14:28 fuzzer started 2023/06/20 22:14:28 dialing manager at localhost:36067 2023/06/20 22:14:28 checking machine... 2023/06/20 22:14:28 checking revisions... [ 41.833874] kmemleak: Automatic memory scanning thread ended 2023/06/20 22:14:28 testing simple program... [ 41.879885] cgroup: Unknown subsys name 'net' [ 41.931781] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 22:14:28 Registers: info registers vcpu 0 RAX=dffffc0000000000 RBX=ffff8880147475e8 RCX=0000000000000001 RDX=1ffff110028e8ecd RSI=ffffffff81370a8a RDI=ffff8880147475f4 RBP=ffff888014747668 RSP=ffff888014747500 R8 =0000000000000001 R9 =ffff888014747560 R10=0000000000038001 R11=0000000000020ed2 R12=ffff8880147475e8 R13=0000000000000000 R14=ffff888016991b40 R15=00000000000000a4 RIP=ffffffff813ad547 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 00007f7199fa3900 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=00007f719a55a618 CR3=00000000096ea000 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=00007f9dde6fdba0 CR3=000000000e2e0000 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=34313a3232203032206e754a3e36383c XMM01=7365733a646873732878696e755f6d61 XMM02=736f6c63206e6f6973736573203a296e XMM03=5f6d6170203a5d3133325b6468737320 XMM04=6456774875434142334f726f59427469 XMM05=485320415352203a3268737320363237 XMM06=206d6f726620746f6f7220726f662079 XMM07=00000000000000000000000000000000 XMM08=3a677562656420676f6c737973720000 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000