syzkaller login: [ 61.163929] BUG: Bad rss-counter state mm:000000003abbef64 type:MM_FILEPAGES val:33 [ 61.164967] BUG: Bad rss-counter state mm:000000003abbef64 type:MM_ANONPAGES val:22 [ 61.335440] ================================================================== [ 61.336376] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 61.337338] Read of size 8 at addr ffff88800f1ab5c8 by task sshd/220 [ 61.338110] [ 61.338439] CPU: 0 PID: 220 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 61.339321] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 61.340310] Call Trace: [ 61.340797] [ 61.341150] dump_stack_lvl+0x91/0xf0 [ 61.341754] print_report+0xcc/0x620 [ 61.342343] ? __virt_addr_valid+0x102/0x340 [ 61.343045] ? vma_interval_tree_remove+0xc75/0xec0 [ 61.343795] ? vma_interval_tree_remove+0xc75/0xec0 [ 61.344551] kasan_report+0xbe/0xf0 [ 61.345136] ? vma_interval_tree_remove+0xc75/0xec0 [ 61.345901] vma_interval_tree_remove+0xc75/0xec0 [ 61.346657] vma_prepare+0xc54/0x11a0 [ 61.347251] __split_vma+0x5af/0x950 [ 61.347831] ? __pfx___split_vma+0x10/0x10 [ 61.348471] ? find_held_lock+0x2c/0x110 [ 61.349109] do_vmi_align_munmap+0x2ba/0x11f0 [ 61.349797] ? lock_is_held_type+0x9f/0x120 [ 61.350486] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 61.351229] ? mtree_range_walk+0x632/0x900 [ 61.351822] ? mas_walk+0x5c7/0x7c0 [ 61.352305] do_vmi_munmap+0x1f1/0x2b0 [ 61.352801] mmap_region+0x1f9/0x2660 [ 61.353282] ? vm_mmap_pgoff+0x15c/0x3a0 [ 61.353791] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 61.354519] ? __pfx_lock_acquire+0x10/0x10 [ 61.355045] ? __pfx_mmap_region+0x10/0x10 [ 61.355572] ? security_mmap_addr+0x7d/0xa0 [ 61.356102] ? get_unmapped_area+0x1f5/0x3f0 [ 61.356654] do_mmap+0x854/0xf00 [ 61.357099] vm_mmap_pgoff+0x1a6/0x3a0 [ 61.357626] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 61.358201] ksys_mmap_pgoff+0x3af/0x500 [ 61.358715] do_syscall_64+0x3f/0x90 [ 61.359203] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 61.359859] RIP: 0033:0x7fcd4e41ed82 [ 61.360330] 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 [ 61.362588] RSP: 002b:00007ffed1cb3898 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 61.363552] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007fcd4e41ed82 [ 61.364439] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007fcd4d858000 [ 61.365330] RBP: 00007fcd4d858000 R08: 0000000000000009 R09: 0000000000001000 [ 61.366215] R10: 0000000000000812 R11: 0000000000000206 R12: 0000559c90e02ec0 [ 61.367119] R13: 00007ffed1cb38b0 R14: 00007ffed1cb38e0 R15: 00007ffed1cb3c40 [ 61.368014] [ 61.368318] [ 61.368538] Allocated by task 213: [ 61.368984] kasan_save_stack+0x22/0x50 [ 61.369515] kasan_set_track+0x25/0x30 [ 61.370035] __kasan_slab_alloc+0x59/0x70 [ 61.370604] kmem_cache_alloc+0x16b/0x370 [ 61.371148] vm_area_dup+0x20/0x160 [ 61.371625] __split_vma+0x170/0x950 [ 61.372114] split_vma+0xc6/0x110 [ 61.372569] mprotect_fixup+0x8d2/0xb30 [ 61.373096] do_mprotect_pkey+0x87e/0xd40 [ 61.373640] __x64_sys_mprotect+0x78/0xc0 [ 61.374184] do_syscall_64+0x3f/0x90 [ 61.374709] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 61.375379] [ 61.375602] Freed by task 213: [ 61.376016] kasan_save_stack+0x22/0x50 [ 61.376551] kasan_set_track+0x25/0x30 [ 61.377063] kasan_save_free_info+0x2b/0x50 [ 61.377630] __kasan_slab_free+0x10a/0x190 [ 61.378190] kmem_cache_free+0x10d/0x4d0 [ 61.378737] rcu_core+0x8c8/0x2860 [ 61.379204] __do_softirq+0x1b7/0x7d4 [ 61.379713] [ 61.379940] Last potentially related work creation: [ 61.380565] kasan_save_stack+0x22/0x50 [ 61.381088] __kasan_record_aux_stack+0x8e/0xa0 [ 61.381689] __call_rcu_common.constprop.0+0x6a/0xb90 [ 61.382363] remove_vma+0x139/0x170 [ 61.382839] do_vmi_align_munmap+0xd4a/0x11f0 [ 61.383434] do_vmi_munmap+0x1f1/0x2b0 [ 61.383944] __vm_munmap+0x138/0x3a0 [ 61.384433] __x64_sys_munmap+0x59/0x80 [ 61.384949] do_syscall_64+0x3f/0x90 [ 61.385447] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 61.386119] [ 61.386343] The buggy address belongs to the object at ffff88800f1ab570 [ 61.386343] which belongs to the cache vm_area_struct of size 168 [ 61.387902] The buggy address is located 88 bytes inside of [ 61.387902] freed 168-byte region [ffff88800f1ab570, ffff88800f1ab618) [ 61.389364] [ 61.389585] The buggy address belongs to the physical page: [ 61.390275] page:0000000064ec4be5 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xf1ab [ 61.391417] memcg:ffff88800e8d1e01 [ 61.391860] anon flags: 0x100000000000200(slab|node=0|zone=1) [ 61.392591] page_type: 0xffffffff() [ 61.393061] raw: 0100000000000200 ffff8880087a0c80 ffffea00003cb580 dead000000000005 [ 61.394023] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800e8d1e01 [ 61.394985] page dumped because: kasan: bad access detected [ 61.395675] [ 61.395901] Memory state around the buggy address: [ 61.396514] ffff88800f1ab480: fc 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 61.397410] ffff88800f1ab500: 00 00 00 00 00 00 fc fc fc fc fc fc fc fc fa fb [ 61.398305] >ffff88800f1ab580: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 61.399221] ^ [ 61.399914] ffff88800f1ab600: fb fb fb fc fc fc fc fc fc fc fc fa fb fb fb fb [ 61.400815] ffff88800f1ab680: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 61.401707] ================================================================== [ 61.402899] Disabling lock debugging due to kernel taint [ 63.253903] BUG: Bad rss-counter state mm:00000000b641e342 type:MM_FILEPAGES val:33 [ 63.254667] BUG: Bad rss-counter state mm:00000000b641e342 type:MM_ANONPAGES val:22 [ 63.659310] BUG: Bad rss-counter state mm:0000000057b909a3 type:MM_FILEPAGES val:33 [ 63.660031] BUG: Bad rss-counter state mm:0000000057b909a3 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:55721' (ECDSA) to the list of known hosts. 2023/06/21 04:56:37 fuzzer started 2023/06/21 04:56:38 dialing manager at localhost:36067 2023/06/21 04:56:38 checking machine... 2023/06/21 04:56:38 checking revisions... [ 64.278395] kmemleak: Automatic memory scanning thread ended 2023/06/21 04:56:38 testing simple program... [ 64.329071] cgroup: Unknown subsys name 'net' [ 64.370869] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 04:56:37 Registers: info registers vcpu 0 RAX=ffff88806c400000 RBX=00000000331c60ed RCX=ffff88806ca30768 RDX=000000000000000d RSI=0000000000000002 RDI=000000004799b3ad RBP=ffff88800958c000 RSP=ffff88800fb875f0 R8 =00000000c46c2e7d R9 =fffffbfff0ba7a6a R10=ffffffff85d3d357 R11=00000000000b6a61 R12=0000000000000000 R13=0000000000000000 R14=ffff88800fb87658 R15=000000000000000d RIP=ffffffff822704ed 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 00007f487f9e6900 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=00007f487ff9d618 CR3=000000000ebdc000 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=0000000000000000 RBX=ffff88806cf09b40 RCX=ffffffff860a1401 RDX=1ffff1100d9e1369 RSI=ffffffff8451105e RDI=ffff88806cf09b48 RBP=0000000000000009 RSP=ffff88806cf09a58 R8 =ffffffff860a1444 R9 =ffff88806cf09ab8 R10=0000000000038001 R11=000000000000792d R12=ffff88806cf09b40 R13=0000000000000000 R14=ffff888008d951c0 R15=ffff88800db9d380 RIP=ffffffff813ad4be RFL=00000216 [----AP-] 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 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=00007f174180b5f0 CR3=0000000015a98000 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=2037333a36353a3430203132206e754a XMM01=73732878696e755f6d6170203a5d3932 XMM02=65736f6c63206e6f6973736573203a29 XMM03=755f6d6170203a5d3932325b64687373 XMM04=69662068637573206f4e203a656c6163 XMM05=3a656c696620766e65206e65706f206f XMM06=65733a6468737328766e655f6d617020 XMM07=6b7a79732037333a36353a3430203132 XMM08=3d656e696c646d632022656369767265 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000