syzkaller login: [ 35.708080] BUG: Bad rss-counter state mm:000000005746b150 type:MM_FILEPAGES val:33 [ 35.709728] BUG: Bad rss-counter state mm:000000005746b150 type:MM_ANONPAGES val:22 [ 35.891438] ================================================================== [ 35.892472] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 35.893538] Read of size 8 at addr ffff88801940bed8 by task sshd/221 [ 35.894504] [ 35.894758] CPU: 0 PID: 221 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 35.895772] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 35.896910] Call Trace: [ 35.897279] [ 35.897606] dump_stack_lvl+0x91/0xf0 [ 35.898154] print_report+0xcc/0x620 [ 35.898705] ? __virt_addr_valid+0x102/0x340 [ 35.899333] ? vma_interval_tree_remove+0xc75/0xec0 [ 35.900051] ? vma_interval_tree_remove+0xc75/0xec0 [ 35.900753] kasan_report+0xbe/0xf0 [ 35.901303] ? vma_interval_tree_remove+0xc75/0xec0 [ 35.902033] vma_interval_tree_remove+0xc75/0xec0 [ 35.902734] vma_prepare+0xc54/0x11a0 [ 35.903293] __split_vma+0x5af/0x950 [ 35.903866] ? __pfx___split_vma+0x10/0x10 [ 35.904481] ? find_held_lock+0x2c/0x110 [ 35.905083] do_vmi_align_munmap+0x2ba/0x11f0 [ 35.905747] ? lock_is_held_type+0x9f/0x120 [ 35.906376] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 35.907088] ? mtree_range_walk+0x632/0x900 [ 35.907743] ? mas_walk+0x5c7/0x7c0 [ 35.908298] do_vmi_munmap+0x1f1/0x2b0 [ 35.908873] mmap_region+0x1f9/0x2660 [ 35.909441] ? vm_mmap_pgoff+0x15c/0x3a0 [ 35.910034] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 35.910868] ? __pfx_lock_acquire+0x10/0x10 [ 35.911493] ? __pfx_mmap_region+0x10/0x10 [ 35.912128] ? security_mmap_addr+0x7d/0xa0 [ 35.912751] ? get_unmapped_area+0x1f5/0x3f0 [ 35.913402] do_mmap+0x854/0xf00 [ 35.913915] vm_mmap_pgoff+0x1a6/0x3a0 [ 35.914501] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 35.915157] ksys_mmap_pgoff+0x3af/0x500 [ 35.915782] do_syscall_64+0x3f/0x90 [ 35.916339] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 35.917094] RIP: 0033:0x7fe0deb21d82 [ 35.917634] 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 [ 35.920160] RSP: 002b:00007ffec1ebce88 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 35.921207] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007fe0deb21d82 [ 35.922187] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007fe0ddf5b000 [ 35.923160] RBP: 00007fe0ddf5b000 R08: 0000000000000009 R09: 0000000000001000 [ 35.924168] R10: 0000000000000812 R11: 0000000000000206 R12: 000055a383cdcf70 [ 35.925163] R13: 00007ffec1ebcea0 R14: 00007ffec1ebced0 R15: 00007ffec1ebd230 [ 35.926149] [ 35.926483] [ 35.926733] Allocated by task 214: [ 35.927234] kasan_save_stack+0x22/0x50 [ 35.927834] kasan_set_track+0x25/0x30 [ 35.928399] __kasan_slab_alloc+0x59/0x70 [ 35.928999] kmem_cache_alloc+0x16b/0x370 [ 35.929593] vm_area_dup+0x20/0x160 [ 35.930114] __split_vma+0x170/0x950 [ 35.930672] split_vma+0xc6/0x110 [ 35.931181] mprotect_fixup+0x8d2/0xb30 [ 35.931787] do_mprotect_pkey+0x87e/0xd40 [ 35.932395] __x64_sys_mprotect+0x78/0xc0 [ 35.933008] do_syscall_64+0x3f/0x90 [ 35.933561] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 35.934304] [ 35.934556] Freed by task 214: [ 35.935020] kasan_save_stack+0x22/0x50 [ 35.935635] kasan_set_track+0x25/0x30 [ 35.936210] kasan_save_free_info+0x2b/0x50 [ 35.936834] __kasan_slab_free+0x10a/0x190 [ 35.937457] kmem_cache_free+0x10d/0x4d0 [ 35.938058] rcu_core+0x8c8/0x2860 [ 35.938580] __do_softirq+0x1b7/0x7d4 [ 35.939141] [ 35.939396] Last potentially related work creation: [ 35.940100] kasan_save_stack+0x22/0x50 [ 35.940694] __kasan_record_aux_stack+0x8e/0xa0 [ 35.941371] __call_rcu_common.constprop.0+0x6a/0xb90 [ 35.942132] remove_vma+0x139/0x170 [ 35.942660] do_vmi_align_munmap+0xd4a/0x11f0 [ 35.943313] do_vmi_munmap+0x1f1/0x2b0 [ 35.943898] __vm_munmap+0x138/0x3a0 [ 35.944440] __x64_sys_munmap+0x59/0x80 [ 35.945023] do_syscall_64+0x3f/0x90 [ 35.945574] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 35.946331] [ 35.946581] The buggy address belongs to the object at ffff88801940be80 [ 35.946581] which belongs to the cache vm_area_struct of size 168 [ 35.948326] The buggy address is located 88 bytes inside of [ 35.948326] freed 168-byte region [ffff88801940be80, ffff88801940bf28) [ 35.949990] [ 35.950245] The buggy address belongs to the physical page: [ 35.951023] page:00000000a8e22577 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x1940b [ 35.952336] memcg:ffff888010352601 [ 35.952838] flags: 0x100000000000200(slab|node=0|zone=1) [ 35.953586] page_type: 0xffffffff() [ 35.954118] raw: 0100000000000200 ffff88800879fc80 dead000000000122 0000000000000000 [ 35.955193] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff888010352601 [ 35.956264] page dumped because: kasan: bad access detected [ 35.957048] [ 35.957299] Memory state around the buggy address: [ 35.957990] ffff88801940bd80: fc fc fc 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 35.959001] ffff88801940be00: 00 00 00 00 00 00 00 00 fc fc fc fc fc fc fc fc [ 35.960032] >ffff88801940be80: fa fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 35.961033] ^ [ 35.961889] ffff88801940bf00: fb fb fb fb fb fc fc fc fc fc fc fc fc fc fc fc [ 35.962896] ffff88801940bf80: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc [ 35.963916] ================================================================== [ 35.965179] Disabling lock debugging due to kernel taint [ 37.960953] BUG: Bad rss-counter state mm:0000000083de4232 type:MM_FILEPAGES val:33 [ 37.962384] BUG: Bad rss-counter state mm:0000000083de4232 type:MM_ANONPAGES val:22 [ 38.504182] BUG: Bad rss-counter state mm:00000000527bc0e7 type:MM_FILEPAGES val:33 [ 38.505599] BUG: Bad rss-counter state mm:00000000527bc0e7 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:38156' (ECDSA) to the list of known hosts. 2023/06/20 05:06:30 fuzzer started 2023/06/20 05:06:31 dialing manager at localhost:44161 2023/06/20 05:06:31 checking machine... 2023/06/20 05:06:31 checking revisions... [ 39.142369] kmemleak: Automatic memory scanning thread ended 2023/06/20 05:06:31 testing simple program... [ 39.186538] cgroup: Unknown subsys name 'net' [ 39.235256] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 05:06:25 Registers: info registers vcpu 0 RAX=0000000000000000 RBX=1ffff1100202efb4 RCX=0000000000000000 RDX=ffff88801b3bb680 RSI=ffffffff818f050e RDI=ffff888008c14aa0 RBP=ffff888008c14aa0 RSP=ffff888010177d80 R8 =0000000000000005 R9 =0000000000000000 R10=0000000000000000 R11=00000000000b6996 R12=ffff888008c14aa0 R13=ffff8880142cc000 R14=ffffffff84d2fa00 R15=ffff888008f92000 RIP=ffffffff814c07e0 RFL=00000286 [--S--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 00007f45844b2900 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=00007f4584a69618 CR3=000000000ecda000 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=ffffffff8450c50e RDX=ffffed100d9e6a01 RSI=0000000000000004 RDI=ffffffff812889a5 RBP=dffffc0000000000 RSP=ffff888008e27e70 R8 =0000000000000000 R9 =ffffed100d9e6a00 R10=ffff88806cf35003 R11=ffff888008c58400 R12=ffffffff85d3bed0 R13=1ffff110011c4fd3 R14=0000000000000000 R15=0000000000000000 RIP=ffffffff8450d49f 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=00007f2e90fb8f40 CR3=000000000c7b4000 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=87abbc7023681289bb4a746936b5dbca XMM02=2c67c8bc2e329bc3000000000011cca8 XMM03=fb795ef6d65770560000000000123d08 XMM04=e7e28dd42e3fd40000000000000ae988 XMM05=e4cb8bb95a7664b600000000001338a8 XMM06=65e1d36024599ada0000000000132710 XMM07=e042d86d42eb936e0000000000123f88 XMM08=8b5a6152454e52f4000000000011cd08 XMM09=00000000000000000000000000000000 XMM10=20200000000020202020202020200000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000