syzkaller login: [ 31.119615] BUG: Bad rss-counter state mm:000000006ea3170e type:MM_FILEPAGES val:33 [ 31.121585] BUG: Bad rss-counter state mm:000000006ea3170e type:MM_ANONPAGES val:22 [ 31.290102] ================================================================== [ 31.291191] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 31.292308] Read of size 8 at addr ffff888018e40d08 by task sshd/220 [ 31.293403] [ 31.293665] CPU: 1 PID: 220 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 31.294680] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 31.295847] Call Trace: [ 31.296233] [ 31.296574] dump_stack_lvl+0x91/0xf0 [ 31.297188] print_report+0xcc/0x620 [ 31.297670] ? __virt_addr_valid+0x102/0x340 [ 31.298189] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.298766] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.299342] kasan_report+0xbe/0xf0 [ 31.299809] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.300422] vma_interval_tree_remove+0xc75/0xec0 [ 31.301030] vma_prepare+0xc54/0x11a0 [ 31.301504] __split_vma+0x5af/0x950 [ 31.301968] ? __pfx___split_vma+0x10/0x10 [ 31.302490] ? find_held_lock+0x2c/0x110 [ 31.302999] do_vmi_align_munmap+0x2ba/0x11f0 [ 31.303558] ? lock_is_held_type+0x9f/0x120 [ 31.304091] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 31.304691] ? mtree_range_walk+0x632/0x900 [ 31.305241] ? mas_walk+0x5c7/0x7c0 [ 31.305712] do_vmi_munmap+0x1f1/0x2b0 [ 31.306195] mmap_region+0x1f9/0x2660 [ 31.306671] ? vm_mmap_pgoff+0x15c/0x3a0 [ 31.307170] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 31.307877] ? __pfx_lock_acquire+0x10/0x10 [ 31.308402] ? __pfx_mmap_region+0x10/0x10 [ 31.308960] ? security_mmap_addr+0x7d/0xa0 [ 31.309492] ? get_unmapped_area+0x1f5/0x3f0 [ 31.310036] do_mmap+0x854/0xf00 [ 31.310471] vm_mmap_pgoff+0x1a6/0x3a0 [ 31.310958] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 31.311515] ksys_mmap_pgoff+0x3af/0x500 [ 31.312017] do_syscall_64+0x3f/0x90 [ 31.312495] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.313141] RIP: 0033:0x7fd67649fd82 [ 31.313593] 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 [ 31.315716] RSP: 002b:00007ffd2752eeb8 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 31.316623] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007fd67649fd82 [ 31.317487] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007fd6758d9000 [ 31.318361] RBP: 00007fd6758d9000 R08: 0000000000000009 R09: 0000000000001000 [ 31.319231] R10: 0000000000000812 R11: 0000000000000206 R12: 00005648e8742ec0 [ 31.320099] R13: 00007ffd2752eed0 R14: 00007ffd2752ef00 R15: 00007ffd2752f260 [ 31.320978] [ 31.321278] [ 31.321492] Allocated by task 213: [ 31.321924] kasan_save_stack+0x22/0x50 [ 31.322450] kasan_set_track+0x25/0x30 [ 31.322941] __kasan_slab_alloc+0x59/0x70 [ 31.323470] kmem_cache_alloc+0x16b/0x370 [ 31.323984] vm_area_dup+0x20/0x160 [ 31.324438] __split_vma+0x170/0x950 [ 31.324921] split_vma+0xc6/0x110 [ 31.325359] mprotect_fixup+0x8d2/0xb30 [ 31.325863] do_mprotect_pkey+0x87e/0xd40 [ 31.326380] __x64_sys_mprotect+0x78/0xc0 [ 31.326901] do_syscall_64+0x3f/0x90 [ 31.327374] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.328012] [ 31.328225] Freed by task 213: [ 31.328620] kasan_save_stack+0x22/0x50 [ 31.329132] kasan_set_track+0x25/0x30 [ 31.329619] kasan_save_free_info+0x2b/0x50 [ 31.330155] __kasan_slab_free+0x10a/0x190 [ 31.330691] kmem_cache_free+0x10d/0x4d0 [ 31.331198] rcu_core+0x8c8/0x2860 [ 31.331641] __do_softirq+0x1b7/0x7d4 [ 31.332114] [ 31.332326] Last potentially related work creation: [ 31.332916] kasan_save_stack+0x22/0x50 [ 31.333422] __kasan_record_aux_stack+0x8e/0xa0 [ 31.334068] __call_rcu_common.constprop.0+0x6a/0xb90 [ 31.334710] remove_vma+0x139/0x170 [ 31.335160] do_vmi_align_munmap+0xd4a/0x11f0 [ 31.335719] do_vmi_munmap+0x1f1/0x2b0 [ 31.336208] __vm_munmap+0x138/0x3a0 [ 31.336674] __x64_sys_munmap+0x59/0x80 [ 31.337229] do_syscall_64+0x3f/0x90 [ 31.337704] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.338355] [ 31.338574] The buggy address belongs to the object at ffff888018e40cb0 [ 31.338574] which belongs to the cache vm_area_struct of size 168 [ 31.340029] The buggy address is located 88 bytes inside of [ 31.340029] freed 168-byte region [ffff888018e40cb0, ffff888018e40d58) [ 31.341433] [ 31.341656] The buggy address belongs to the physical page: [ 31.342314] page:00000000bf4b0d72 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x18e40 [ 31.343401] memcg:ffff88800f3b4c01 [ 31.343831] flags: 0x100000000000200(slab|node=0|zone=1) [ 31.344478] page_type: 0xffffffff() [ 31.344948] raw: 0100000000000200 ffff8880087a0c80 dead000000000122 0000000000000000 [ 31.345870] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800f3b4c01 [ 31.346768] page dumped because: kasan: bad access detected [ 31.347424] [ 31.347641] Memory state around the buggy address: [ 31.348198] ffff888018e40c00: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 fc fc [ 31.349025] ffff888018e40c80: fc fc fc fc fc fc fa fb fb fb fb fb fb fb fb fb [ 31.349820] >ffff888018e40d00: fb fb fb fb fb fb fb fb fb fb fb fc fc fc fc fc [ 31.350623] ^ [ 31.351045] ffff888018e40d80: fc fc fc fa fb fb fb fb fb fb fb fb fb fb fb fb [ 31.351851] ffff888018e40e00: fb fb fb fb fb fb fb fb fc fc fc fc fc fc fc fc [ 31.352651] ================================================================== [ 31.353552] Disabling lock debugging due to kernel taint [ 33.540722] BUG: Bad rss-counter state mm:0000000008837bcb type:MM_FILEPAGES val:33 [ 33.542161] BUG: Bad rss-counter state mm:0000000008837bcb type:MM_ANONPAGES val:22 [ 34.077586] BUG: Bad rss-counter state mm:00000000a7f7a5ae type:MM_FILEPAGES val:33 [ 34.079234] BUG: Bad rss-counter state mm:00000000a7f7a5ae type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:42525' (ECDSA) to the list of known hosts. 2023/06/20 18:07:50 fuzzer started 2023/06/20 18:07:50 dialing manager at localhost:36067 2023/06/20 18:07:51 checking machine... 2023/06/20 18:07:51 checking revisions... [ 34.864310] kmemleak: Automatic memory scanning thread ended 2023/06/20 18:07:51 testing simple program... [ 34.926848] cgroup: Unknown subsys name 'net' [ 34.979785] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 18:07:50 Registers: info registers vcpu 0 RAX=dffffc0000000000 RBX=ffffffff852ca350 RCX=0000000000000000 RDX=1ffff1100110b50b RSI=0000000000000002 RDI=ffff88800cf28000 RBP=dffffc0000000000 RSP=ffff888017de7ab8 R8 =0000000000000005 R9 =0000000000000000 R10=0000000000000000 R11=0000000000000000 R12=dffffc0000000000 R13=0000000000001fa0 R14=ffff888017de7e60 R15=ffff88800885a840 RIP=ffffffff81f0fc02 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 00007feb78f4b700 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=00007fcb77e29f70 CR3=000000000ea84000 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=656e6e6f637369642064657669656365 XMM02=63736964203a31313a34363430342074 XMM03=66207463656e6e6f6373696420646576 XMM04=6456774875434142334f726f59427469 XMM05=485320415352203a3268737320343634 XMM06=206d6f726620746f6f7220726f662079 XMM07=00000000000000000000000000000000 XMM08=3a677562656420676f6c737973720000 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=1ffffffff0bb2584 RBX=ffffffff85d92c20 RCX=ffffffff81132ffd RDX=0000000000000000 RSI=ffffffff86098092 RDI=ffffffff85d92c20 RBP=ffffffff85d92c20 RSP=ffff88806cf09990 R8 =ffffffff86098092 R9 =0000000000000000 R10=0000000000038001 R11=0000000000006097 R12=ffffffff85d92c20 R13=ffffffff85d92c20 R14=ffffffff85d92c20 R15=dffffc0000000000 RIP=ffffffff8112fc7f 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 00007fa80f1fd900 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=00007fa80f7b4618 CR3=000000000951a000 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=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