syzkaller login: [ 30.483551] BUG: Bad rss-counter state mm:00000000d8c416b5 type:MM_FILEPAGES val:33 [ 30.484698] BUG: Bad rss-counter state mm:00000000d8c416b5 type:MM_ANONPAGES val:22 [ 30.658652] ================================================================== [ 30.659888] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 30.661046] Read of size 8 at addr ffff88800e24c5c8 by task sshd/221 [ 30.661989] [ 30.662266] CPU: 1 PID: 221 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 30.663322] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 30.664532] Call Trace: [ 30.664932] [ 30.665302] dump_stack_lvl+0x91/0xf0 [ 30.665910] print_report+0xcc/0x620 [ 30.666546] ? __virt_addr_valid+0x102/0x340 [ 30.667241] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.668035] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.668848] kasan_report+0xbe/0xf0 [ 30.669462] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.670319] vma_interval_tree_remove+0xc75/0xec0 [ 30.671085] vma_prepare+0xc54/0x11a0 [ 30.671726] __split_vma+0x5af/0x950 [ 30.672331] ? __pfx___split_vma+0x10/0x10 [ 30.673007] ? find_held_lock+0x2c/0x110 [ 30.673692] do_vmi_align_munmap+0x2ba/0x11f0 [ 30.674448] ? lock_is_held_type+0x9f/0x120 [ 30.675149] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 30.675938] ? mtree_range_walk+0x632/0x900 [ 30.676667] ? mas_walk+0x5c7/0x7c0 [ 30.677236] do_vmi_munmap+0x1f1/0x2b0 [ 30.677818] mmap_region+0x1f9/0x2660 [ 30.678399] ? vm_mmap_pgoff+0x15c/0x3a0 [ 30.678995] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 30.679837] ? __pfx_lock_acquire+0x10/0x10 [ 30.680455] ? __pfx_mmap_region+0x10/0x10 [ 30.681072] ? security_mmap_addr+0x7d/0xa0 [ 30.681691] ? get_unmapped_area+0x1f5/0x3f0 [ 30.682356] do_mmap+0x854/0xf00 [ 30.682930] vm_mmap_pgoff+0x1a6/0x3a0 [ 30.683543] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 30.684202] ksys_mmap_pgoff+0x3af/0x500 [ 30.684798] do_syscall_64+0x3f/0x90 [ 30.685372] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.686161] RIP: 0033:0x7f5bd9d80d82 [ 30.686703] 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 [ 30.689245] RSP: 002b:00007ffd51bc31e8 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 30.690360] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f5bd9d80d82 [ 30.691348] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f5bd91ba000 [ 30.692342] RBP: 00007f5bd91ba000 R08: 0000000000000009 R09: 0000000000001000 [ 30.693325] R10: 0000000000000812 R11: 0000000000000206 R12: 00005595aeb5fec0 [ 30.694326] R13: 00007ffd51bc3200 R14: 00007ffd51bc3230 R15: 00007ffd51bc3590 [ 30.695455] [ 30.695815] [ 30.696070] Allocated by task 214: [ 30.696574] kasan_save_stack+0x22/0x50 [ 30.697166] kasan_set_track+0x25/0x30 [ 30.697754] __kasan_slab_alloc+0x59/0x70 [ 30.698398] kmem_cache_alloc+0x16b/0x370 [ 30.699009] vm_area_dup+0x20/0x160 [ 30.699540] __split_vma+0x170/0x950 [ 30.700154] split_vma+0xc6/0x110 [ 30.700671] mprotect_fixup+0x8d2/0xb30 [ 30.701282] do_mprotect_pkey+0x87e/0xd40 [ 30.701956] __x64_sys_mprotect+0x78/0xc0 [ 30.702603] do_syscall_64+0x3f/0x90 [ 30.703154] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.703905] [ 30.704153] Freed by task 214: [ 30.704612] kasan_save_stack+0x22/0x50 [ 30.705198] kasan_set_track+0x25/0x30 [ 30.705766] kasan_save_free_info+0x2b/0x50 [ 30.706398] __kasan_slab_free+0x10a/0x190 [ 30.707014] kmem_cache_free+0x10d/0x4d0 [ 30.707652] rcu_core+0x8c8/0x2860 [ 30.708236] __do_softirq+0x1b7/0x7d4 [ 30.708800] [ 30.709055] Last potentially related work creation: [ 30.709742] kasan_save_stack+0x22/0x50 [ 30.710349] __kasan_record_aux_stack+0x8e/0xa0 [ 30.711022] __call_rcu_common.constprop.0+0x6a/0xb90 [ 30.711761] remove_vma+0x139/0x170 [ 30.712279] do_vmi_align_munmap+0xd4a/0x11f0 [ 30.712918] do_vmi_munmap+0x1f1/0x2b0 [ 30.713481] __vm_munmap+0x138/0x3a0 [ 30.714020] __x64_sys_munmap+0x59/0x80 [ 30.714640] do_syscall_64+0x3f/0x90 [ 30.715256] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.716076] [ 30.716351] The buggy address belongs to the object at ffff88800e24c570 [ 30.716351] which belongs to the cache vm_area_struct of size 168 [ 30.718235] The buggy address is located 88 bytes inside of [ 30.718235] freed 168-byte region [ffff88800e24c570, ffff88800e24c618) [ 30.719974] [ 30.720238] The buggy address belongs to the physical page: [ 30.721069] page:000000000af4c289 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xe24c [ 30.722442] memcg:ffff88800e257001 [ 30.722981] flags: 0x100000000000200(slab|node=0|zone=1) [ 30.723797] page_type: 0xffffffff() [ 30.724357] raw: 0100000000000200 ffff8880087a0c80 ffffea0000406ec0 dead000000000006 [ 30.725507] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800e257001 [ 30.726666] page dumped because: kasan: bad access detected [ 30.727520] [ 30.727791] Memory state around the buggy address: [ 30.728500] ffff88800e24c480: fc fa fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 30.729593] ffff88800e24c500: fb fb fb fb fb fb fc fc fc fc fc fc fc fc fa fb [ 30.730684] >ffff88800e24c580: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 30.731743] ^ [ 30.732579] ffff88800e24c600: fb fb fb fc fc fc fc fc fc fc fc 00 00 00 00 00 [ 30.733619] ffff88800e24c680: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 30.734717] ================================================================== [ 30.735851] Disabling lock debugging due to kernel taint [ 33.464084] BUG: Bad rss-counter state mm:00000000d451b2e7 type:MM_FILEPAGES val:33 [ 33.465244] BUG: Bad rss-counter state mm:00000000d451b2e7 type:MM_ANONPAGES val:22 [ 33.860392] BUG: Bad rss-counter state mm:00000000327d4564 type:MM_FILEPAGES val:33 [ 33.861433] BUG: Bad rss-counter state mm:00000000327d4564 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:31508' (ECDSA) to the list of known hosts. 2023/06/20 17:05:59 fuzzer started 2023/06/20 17:05:59 dialing manager at localhost:36067 2023/06/20 17:05:59 checking machine... 2023/06/20 17:05:59 checking revisions... [ 34.570798] kmemleak: Automatic memory scanning thread ended 2023/06/20 17:05:59 testing simple program... [ 34.625804] cgroup: Unknown subsys name 'net' [ 34.711833] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 17:05:58 Registers: info registers vcpu 0 RAX=dffffc0000000000 RBX=ffffffff8112fc9f RCX=ffffffff864bce01 RDX=1ffff1100d9c135e RSI=0000000000000000 RDI=ffffffff8112fc9f RBP=ffffffff8112fc9f RSP=ffff88806ce09a40 R8 =ffffffff864bce30 R9 =ffff88806ce09ad8 R10=0000000000038001 R11=00000000000b6d7d R12=ffff88806ce09b60 R13=0000000000000000 R14=ffff88801989b680 R15=ffff888014635480 RIP=ffffffff811fc6f7 RFL=00000292 [--S-A--] 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 00007f1913cfa900 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=00007f19142b1618 CR3=000000001a954000 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=563412feff00545000000000000080fe 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=00007f38342b3000 CR3=000000000c462000 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=f4897cde0320dbba13418dd77b601eff XMM02=ec2efd57dc4c00df000000000011a388 XMM03=61b1b12638784cbd000000000011a458 XMM04=addd598d7669f6ff00000000000ae988 XMM05=e4cb8bb95a7664b60000000000131a38 XMM06=069c64ef6154a2ca00000000001308a0 XMM07=e042d86d42eb936e0000000000121ee8 XMM08=61b1b12638784cbd000000000011a458 XMM09=00000000000000000000000000000000 XMM10=20200000000020202020202020200000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000