syzkaller login: [ 31.192033] BUG: Bad rss-counter state mm:0000000066e5356c type:MM_FILEPAGES val:33 [ 31.193452] BUG: Bad rss-counter state mm:0000000066e5356c type:MM_ANONPAGES val:22 [ 31.350129] ================================================================== [ 31.351274] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 31.352482] Read of size 8 at addr ffff888006a6a4e0 by task sshd/220 [ 31.353621] [ 31.353896] CPU: 1 PID: 220 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 31.354986] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 31.355715] Call Trace: [ 31.355911] [ 31.356074] dump_stack_lvl+0x91/0xf0 [ 31.356378] print_report+0xcc/0x620 [ 31.356669] ? __virt_addr_valid+0x102/0x340 [ 31.356993] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.357349] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.357713] kasan_report+0xbe/0xf0 [ 31.357993] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.358358] vma_interval_tree_remove+0xc75/0xec0 [ 31.358708] vma_prepare+0xc54/0x11a0 [ 31.358995] __split_vma+0x5af/0x950 [ 31.359273] ? __pfx___split_vma+0x10/0x10 [ 31.359589] ? find_held_lock+0x2c/0x110 [ 31.359901] do_vmi_align_munmap+0x2ba/0x11f0 [ 31.360230] ? lock_is_held_type+0x9f/0x120 [ 31.360554] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 31.360916] ? mtree_range_walk+0x632/0x900 [ 31.361235] ? mas_walk+0x5c7/0x7c0 [ 31.361513] do_vmi_munmap+0x1f1/0x2b0 [ 31.361804] mmap_region+0x1f9/0x2660 [ 31.362089] ? vm_mmap_pgoff+0x15c/0x3a0 [ 31.362387] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 31.362801] ? __pfx_lock_acquire+0x10/0x10 [ 31.363101] ? __pfx_mmap_region+0x10/0x10 [ 31.363403] ? security_mmap_addr+0x7d/0xa0 [ 31.363699] ? get_unmapped_area+0x1f5/0x3f0 [ 31.364012] do_mmap+0x854/0xf00 [ 31.364265] vm_mmap_pgoff+0x1a6/0x3a0 [ 31.364566] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 31.364899] ksys_mmap_pgoff+0x3af/0x500 [ 31.365199] do_syscall_64+0x3f/0x90 [ 31.365478] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.365864] RIP: 0033:0x7fc182c42d82 [ 31.366135] 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 [ 31.367402] RSP: 002b:00007ffd3dd8f248 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 31.367943] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007fc182c42d82 [ 31.368458] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007fc18207c000 [ 31.368968] RBP: 00007fc18207c000 R08: 0000000000000009 R09: 0000000000001000 [ 31.369471] R10: 0000000000000812 R11: 0000000000000206 R12: 000056366908db20 [ 31.369975] R13: 00007ffd3dd8f260 R14: 00007ffd3dd8f290 R15: 00007ffd3dd8f5f0 [ 31.370487] [ 31.370658] [ 31.370784] Allocated by task 213: [ 31.371041] kasan_save_stack+0x22/0x50 [ 31.371341] kasan_set_track+0x25/0x30 [ 31.371636] __kasan_slab_alloc+0x59/0x70 [ 31.371952] kmem_cache_alloc+0x16b/0x370 [ 31.372257] vm_area_dup+0x20/0x160 [ 31.372543] __split_vma+0x170/0x950 [ 31.372811] split_vma+0xc6/0x110 [ 31.373070] mprotect_fixup+0x8d2/0xb30 [ 31.373367] do_mprotect_pkey+0x87e/0xd40 [ 31.373668] __x64_sys_mprotect+0x78/0xc0 [ 31.373992] do_syscall_64+0x3f/0x90 [ 31.374283] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.374639] [ 31.374758] Freed by task 213: [ 31.374976] kasan_save_stack+0x22/0x50 [ 31.375267] kasan_set_track+0x25/0x30 [ 31.375564] kasan_save_free_info+0x2b/0x50 [ 31.375874] __kasan_slab_free+0x10a/0x190 [ 31.376191] kmem_cache_free+0x10d/0x4d0 [ 31.376482] rcu_core+0x8c8/0x2860 [ 31.376736] __do_softirq+0x1b7/0x7d4 [ 31.377005] [ 31.377127] Last potentially related work creation: [ 31.377456] kasan_save_stack+0x22/0x50 [ 31.377736] __kasan_record_aux_stack+0x8e/0xa0 [ 31.378059] __call_rcu_common.constprop.0+0x6a/0xb90 [ 31.378424] remove_vma+0x139/0x170 [ 31.378676] do_vmi_align_munmap+0xd4a/0x11f0 [ 31.378990] do_vmi_munmap+0x1f1/0x2b0 [ 31.379269] __vm_munmap+0x138/0x3a0 [ 31.379536] __x64_sys_munmap+0x59/0x80 [ 31.379816] do_syscall_64+0x3f/0x90 [ 31.380084] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.380452] [ 31.380583] The buggy address belongs to the object at ffff888006a6a488 [ 31.380583] which belongs to the cache vm_area_struct of size 168 [ 31.381403] The buggy address is located 88 bytes inside of [ 31.381403] freed 168-byte region [ffff888006a6a488, ffff888006a6a530) [ 31.382190] [ 31.382309] The buggy address belongs to the physical page: [ 31.382675] page:000000002567b02f refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x6a6a [ 31.383281] memcg:ffff888018ea9d01 [ 31.383520] flags: 0x100000000000200(slab|node=0|zone=1) [ 31.383883] page_type: 0xffffffff() [ 31.384138] raw: 0100000000000200 ffff8880087a0c80 dead000000000122 0000000000000000 [ 31.384661] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff888018ea9d01 [ 31.385169] page dumped because: kasan: bad access detected [ 31.385540] [ 31.385660] Memory state around the buggy address: [ 31.385988] ffff888006a6a380: fc fc fc fc 00 00 00 00 00 00 00 00 00 00 00 00 [ 31.386459] ffff888006a6a400: 00 00 00 00 00 00 00 00 00 fc fc fc fc fc fc fc [ 31.386945] >ffff888006a6a480: fc fa fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 31.387434] ^ [ 31.387870] ffff888006a6a500: fb fb fb fb fb fb fc fc fc fc fc fc fc fc fa fb [ 31.388364] ffff888006a6a580: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 31.388853] ================================================================== [ 31.389431] Disabling lock debugging due to kernel taint [ 33.245499] BUG: Bad rss-counter state mm:00000000dfca0e97 type:MM_FILEPAGES val:33 [ 33.246937] BUG: Bad rss-counter state mm:00000000dfca0e97 type:MM_ANONPAGES val:22 [ 33.785389] BUG: Bad rss-counter state mm:00000000bae5d497 type:MM_FILEPAGES val:33 [ 33.786605] BUG: Bad rss-counter state mm:00000000bae5d497 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:2507' (ECDSA) to the list of known hosts. 2023/06/20 12:06:30 fuzzer started 2023/06/20 12:06:31 dialing manager at localhost:36067 2023/06/20 12:06:31 checking machine... 2023/06/20 12:06:31 checking revisions... [ 34.470534] kmemleak: Automatic memory scanning thread ended 2023/06/20 12:06:31 testing simple program... [ 34.521747] cgroup: Unknown subsys name 'net' [ 34.558155] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 12:06:30 Registers: info registers vcpu 0 RAX=1ffff11002e8778f RBX=ffff88801743bc48 RCX=ffffffff812e0135 RDX=0000000000000000 RSI=0000000000000000 RDI=ffff88801743bc78 RBP=ffff8880191ec000 RSP=ffff88806ce09db8 R8 =0000000000000001 R9 =ffffed100d9c13ab R10=0000000000000003 R11=00000000000b6a61 R12=dffffc0000000000 R13=ffff888019217480 R14=ffffffff818d9c06 R15=ffff888017465a00 RIP=ffffffff818464e2 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 00007f98d87a9900 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=00007f0aa2558650 CR3=000000000c5b2000 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=3a7c174e0646ca98ff41b167c647b13b XMM02=000000000011c260d59e07bde36eea69 XMM03=000000000011c388ec2efd57dc4c00df XMM04=5d5460c7fd63265f00000000000ae988 XMM05=4fec3e36aeb797590000000000133fd0 XMM06=4fda316b135da52b0000000000132dc0 XMM07=fb795ef6d65770560000000000123058 XMM08=2c67c8bc2e329bc3000000000011c388 XMM09=00000000000000000000000000000000 XMM10=20200000000020202020202020200000 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=ffff888008c04400 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=00007ffe2930cbc8 CR3=000000000973c000 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=2030333a36303a3231203032206e754a XMM01=657463656e6e6f63736944203a5d3932 XMM02=302e303120746f6f722072657375206d XMM03=203a5d3932325b646873732072656c6c XMM04=69662068637573206f4e203a656c6163 XMM05=3a656c696620766e65206e65706f206f XMM06=65733a6468737328766e655f6d617020 XMM07=6b7a79732030333a36303a3231203032 XMM08=3d656e696c646d632022656369767265 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000