syzkaller login: [ 31.753779] BUG: Bad rss-counter state mm:000000009ac6ec83 type:MM_FILEPAGES val:33 [ 31.754825] BUG: Bad rss-counter state mm:000000009ac6ec83 type:MM_ANONPAGES val:22 [ 31.917732] ================================================================== [ 31.919091] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 31.920427] Read of size 8 at addr ffff888015996058 by task sshd/221 [ 31.921440] [ 31.921721] CPU: 0 PID: 221 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 31.922885] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 31.924209] Call Trace: [ 31.924634] [ 31.925010] dump_stack_lvl+0x91/0xf0 [ 31.925644] print_report+0xcc/0x620 [ 31.926290] ? __virt_addr_valid+0x102/0x340 [ 31.927010] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.927828] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.928633] kasan_report+0xbe/0xf0 [ 31.929263] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.930085] vma_interval_tree_remove+0xc75/0xec0 [ 31.930875] vma_prepare+0xc54/0x11a0 [ 31.931517] __split_vma+0x5af/0x950 [ 31.932145] ? __pfx___split_vma+0x10/0x10 [ 31.932853] ? find_held_lock+0x2c/0x110 [ 31.933530] do_vmi_align_munmap+0x2ba/0x11f0 [ 31.934291] ? lock_is_held_type+0x9f/0x120 [ 31.934999] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 31.935812] ? mtree_range_walk+0x632/0x900 [ 31.936524] ? mas_walk+0x5c7/0x7c0 [ 31.937133] do_vmi_munmap+0x1f1/0x2b0 [ 31.937773] mmap_region+0x1f9/0x2660 [ 31.938433] ? vm_mmap_pgoff+0x15c/0x3a0 [ 31.939113] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 31.940043] ? __pfx_lock_acquire+0x10/0x10 [ 31.940736] ? __pfx_mmap_region+0x10/0x10 [ 31.941440] ? security_mmap_addr+0x7d/0xa0 [ 31.942153] ? get_unmapped_area+0x1f5/0x3f0 [ 31.942878] do_mmap+0x854/0xf00 [ 31.943444] vm_mmap_pgoff+0x1a6/0x3a0 [ 31.944095] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 31.944846] ksys_mmap_pgoff+0x3af/0x500 [ 31.945504] do_syscall_64+0x3f/0x90 [ 31.946127] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.946991] RIP: 0033:0x7f753440ed82 [ 31.947602] 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 [ 31.950482] RSP: 002b:00007fff67546a98 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 31.951691] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f753440ed82 [ 31.952823] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f7533848000 [ 31.953974] RBP: 00007f7533848000 R08: 0000000000000009 R09: 0000000000001000 [ 31.955124] R10: 0000000000000812 R11: 0000000000000206 R12: 000055d56a388980 [ 31.956268] R13: 00007fff67546ab0 R14: 00007fff67546ae0 R15: 00007fff67546e40 [ 31.957394] [ 31.957784] [ 31.958079] Allocated by task 214: [ 31.958636] kasan_save_stack+0x22/0x50 [ 31.959295] kasan_set_track+0x25/0x30 [ 31.959929] __kasan_slab_alloc+0x59/0x70 [ 31.960610] kmem_cache_alloc+0x16b/0x370 [ 31.961295] vm_area_dup+0x20/0x160 [ 31.961896] __split_vma+0x170/0x950 [ 31.962516] split_vma+0xc6/0x110 [ 31.963087] mprotect_fixup+0x8d2/0xb30 [ 31.963732] do_mprotect_pkey+0x87e/0xd40 [ 31.964412] __x64_sys_mprotect+0x78/0xc0 [ 31.965107] do_syscall_64+0x3f/0x90 [ 31.965732] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.966574] [ 31.966850] Freed by task 214: [ 31.967369] kasan_save_stack+0x22/0x50 [ 31.968047] kasan_set_track+0x25/0x30 [ 31.968707] kasan_save_free_info+0x2b/0x50 [ 31.969406] __kasan_slab_free+0x10a/0x190 [ 31.970124] kmem_cache_free+0x10d/0x4d0 [ 31.970776] rcu_core+0x8c8/0x2860 [ 31.971368] __do_softirq+0x1b7/0x7d4 [ 31.971982] [ 31.972261] Last potentially related work creation: [ 31.973055] kasan_save_stack+0x22/0x50 [ 31.973705] __kasan_record_aux_stack+0x8e/0xa0 [ 31.974472] __call_rcu_common.constprop.0+0x6a/0xb90 [ 31.975306] remove_vma+0x139/0x170 [ 31.975909] do_vmi_align_munmap+0xd4a/0x11f0 [ 31.976636] do_vmi_munmap+0x1f1/0x2b0 [ 31.977262] __vm_munmap+0x138/0x3a0 [ 31.977863] __x64_sys_munmap+0x59/0x80 [ 31.978526] do_syscall_64+0x3f/0x90 [ 31.979156] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.979999] [ 31.980277] The buggy address belongs to the object at ffff888015996000 [ 31.980277] which belongs to the cache vm_area_struct of size 168 [ 31.982246] The buggy address is located 88 bytes inside of [ 31.982246] freed 168-byte region [ffff888015996000, ffff8880159960a8) [ 31.984142] [ 31.984426] The buggy address belongs to the physical page: [ 31.985288] page:00000000bb140e56 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x15996 [ 31.986768] memcg:ffff888016c34e01 [ 31.987337] flags: 0x100000000000200(slab|node=0|zone=1) [ 31.988173] page_type: 0xffffffff() [ 31.988754] raw: 0100000000000200 ffff88800879fc80 dead000000000122 0000000000000000 [ 31.989993] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff888016c34e01 [ 31.991211] page dumped because: kasan: bad access detected [ 31.992099] [ 31.992376] Memory state around the buggy address: [ 31.993162] ffff888015995f00: 00 00 00 00 00 00 fc fc fc fc fc fc fc fc fc fc [ 31.994271] ffff888015995f80: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc [ 31.995131] >ffff888015996000: fa fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 31.995985] ^ [ 31.996711] ffff888015996080: fb fb fb fb fb fc fc fc fc fc fc fc fc fa fb fb [ 31.997569] ffff888015996100: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 31.998445] ================================================================== [ 31.999524] Disabling lock debugging due to kernel taint [ 34.046218] BUG: Bad rss-counter state mm:000000005b6481eb type:MM_FILEPAGES val:33 [ 34.047660] BUG: Bad rss-counter state mm:000000005b6481eb type:MM_ANONPAGES val:22 [ 34.504371] BUG: Bad rss-counter state mm:000000004dbe8ab9 type:MM_FILEPAGES val:33 [ 34.505772] BUG: Bad rss-counter state mm:000000004dbe8ab9 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:41749' (ECDSA) to the list of known hosts. 2023/06/19 10:55:06 fuzzer started 2023/06/19 10:55:06 dialing manager at localhost:44161 2023/06/19 10:55:06 checking machine... 2023/06/19 10:55:06 checking revisions... [ 35.161295] kmemleak: Automatic memory scanning thread ended 2023/06/19 10:55:06 testing simple program... [ 35.205498] cgroup: Unknown subsys name 'net' [ 35.261580] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 10:55:04 Registers: info registers vcpu 0 RAX=ffff88800ca5e800 RBX=ffff888010166b18 RCX=1ffff110019129dc RDX=dffffc0000000000 RSI=ffff88800caf5400 RDI=ffff888010166b48 RBP=ffff88800ca53c58 RSP=ffff88800d7dfcb8 R8 =0000000000000001 R9 =0000000000000246 R10=0000000000000003 R11=00000000000b6996 R12=ffff88800caf4400 R13=0000000000000000 R14=ffff88800f06be88 R15=ffff88800f06be40 RIP=ffffffff81847508 RFL=00000046 [---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 00007fab4ede2900 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=00007f2156e80650 CR3=000000000c870000 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=ffffffffffffffffffffffffffffffff XMM01=30306234386136303638616663356134 XMM02=38303062343861363036386166633561 XMM03=2f6c616e72756f6a2f676f6c2f6e7572 XMM04=5f11971e6fa4946200000000000ae988 XMM05=d7afbab4316ba2f50000000000134560 XMM06=c291bd5c70af25b90000000000133350 XMM07=00000000000000000000000000000000 XMM08=415453454d49545f454d49544c414552 XMM09=00000000000000000000000000000000 XMM10=20200000000020202020202020200000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=0000000000000007 RBX=0000000000000000 RCX=0000000000000000 RDX=0000000000000000 RSI=ffffffff814c84fa RDI=ffff88801668d5b4 RBP=ffff88801668d1c0 RSP=ffff88801ca37940 R8 =0000000000000005 R9 =0000000000000000 R10=0000000000000000 R11=00000000000b6996 R12=ffff88801668d1c0 R13=0000000000000000 R14=ffffffff85652a88 R15=ffff888016e4b850 RIP=ffffffff813744ea 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 00007f21568cb900 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=00007f2156e82618 CR3=000000000efea000 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