syzkaller login: [ 31.285029] BUG: Bad rss-counter state mm:00000000366e3bc5 type:MM_FILEPAGES val:33 [ 31.285778] BUG: Bad rss-counter state mm:00000000366e3bc5 type:MM_ANONPAGES val:22 [ 31.409455] ================================================================== [ 31.410092] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 31.410714] Read of size 8 at addr ffff88800d47f5c8 by task sshd/221 [ 31.411213] [ 31.411353] CPU: 0 PID: 221 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 31.411918] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 31.412554] Call Trace: [ 31.412929] [ 31.413116] dump_stack_lvl+0x91/0xf0 [ 31.413467] print_report+0xcc/0x620 [ 31.413951] ? __virt_addr_valid+0x102/0x340 [ 31.414340] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.414741] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.415131] kasan_report+0xbe/0xf0 [ 31.415435] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.415848] vma_interval_tree_remove+0xc75/0xec0 [ 31.416267] vma_prepare+0xc54/0x11a0 [ 31.416575] __split_vma+0x5af/0x950 [ 31.416877] ? __pfx___split_vma+0x10/0x10 [ 31.417253] ? find_held_lock+0x2c/0x110 [ 31.417606] do_vmi_align_munmap+0x2ba/0x11f0 [ 31.417977] ? lock_is_held_type+0x9f/0x120 [ 31.418338] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 31.418734] ? mtree_range_walk+0x632/0x900 [ 31.419089] ? mas_walk+0x5c7/0x7c0 [ 31.419396] do_vmi_munmap+0x1f1/0x2b0 [ 31.419732] mmap_region+0x1f9/0x2660 [ 31.420057] ? vm_mmap_pgoff+0x15c/0x3a0 [ 31.420399] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 31.420855] ? __pfx_lock_acquire+0x10/0x10 [ 31.421198] ? __pfx_mmap_region+0x10/0x10 [ 31.421607] ? security_mmap_addr+0x7d/0xa0 [ 31.421953] ? get_unmapped_area+0x1f5/0x3f0 [ 31.422314] do_mmap+0x854/0xf00 [ 31.422602] vm_mmap_pgoff+0x1a6/0x3a0 [ 31.422933] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 31.423287] ksys_mmap_pgoff+0x3af/0x500 [ 31.423622] do_syscall_64+0x3f/0x90 [ 31.423936] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.424359] RIP: 0033:0x7ff96e771d82 [ 31.424652] 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 [ 31.426092] RSP: 002b:00007ffd3b8d2868 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 31.426693] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007ff96e771d82 [ 31.427242] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007ff96dbab000 [ 31.427796] RBP: 00007ff96dbab000 R08: 0000000000000009 R09: 0000000000001000 [ 31.428346] R10: 0000000000000812 R11: 0000000000000206 R12: 000055b5e7215f70 [ 31.428889] R13: 00007ffd3b8d2880 R14: 00007ffd3b8d28b0 R15: 00007ffd3b8d2c10 [ 31.429471] [ 31.429669] [ 31.429805] Allocated by task 214: [ 31.430089] kasan_save_stack+0x22/0x50 [ 31.430425] kasan_set_track+0x25/0x30 [ 31.430743] __kasan_slab_alloc+0x59/0x70 [ 31.431081] kmem_cache_alloc+0x16b/0x370 [ 31.431446] vm_area_dup+0x20/0x160 [ 31.431771] __split_vma+0x170/0x950 [ 31.432092] split_vma+0xc6/0x110 [ 31.432402] mprotect_fixup+0x8d2/0xb30 [ 31.432756] do_mprotect_pkey+0x87e/0xd40 [ 31.433097] __x64_sys_mprotect+0x78/0xc0 [ 31.433478] do_syscall_64+0x3f/0x90 [ 31.433798] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.434255] [ 31.434410] Freed by task 166: [ 31.434671] kasan_save_stack+0x22/0x50 [ 31.435030] kasan_set_track+0x25/0x30 [ 31.435382] kasan_save_free_info+0x2b/0x50 [ 31.435735] __kasan_slab_free+0x10a/0x190 [ 31.436083] kmem_cache_free+0x10d/0x4d0 [ 31.436411] rcu_core+0x8c8/0x2860 [ 31.436692] __do_softirq+0x1b7/0x7d4 [ 31.436994] [ 31.437129] Last potentially related work creation: [ 31.437523] kasan_save_stack+0x22/0x50 [ 31.437885] __kasan_record_aux_stack+0x8e/0xa0 [ 31.438292] __call_rcu_common.constprop.0+0x6a/0xb90 [ 31.438736] remove_vma+0x139/0x170 [ 31.439044] do_vmi_align_munmap+0xd4a/0x11f0 [ 31.439414] do_vmi_munmap+0x1f1/0x2b0 [ 31.439737] __vm_munmap+0x138/0x3a0 [ 31.440039] __x64_sys_munmap+0x59/0x80 [ 31.440362] do_syscall_64+0x3f/0x90 [ 31.440670] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.441087] [ 31.441225] Second to last potentially related work creation: [ 31.441729] kasan_save_stack+0x22/0x50 [ 31.442050] __kasan_record_aux_stack+0x8e/0xa0 [ 31.442460] __call_rcu_common.constprop.0+0x6a/0xb90 [ 31.442901] remove_vma+0x139/0x170 [ 31.443204] do_vmi_align_munmap+0xd4a/0x11f0 [ 31.443622] do_vmi_munmap+0x1f1/0x2b0 [ 31.443939] mmap_region+0x1f9/0x2660 [ 31.444246] do_mmap+0x854/0xf00 [ 31.444546] vm_mmap_pgoff+0x1a6/0x3a0 [ 31.444860] ksys_mmap_pgoff+0x3af/0x500 [ 31.445174] do_syscall_64+0x3f/0x90 [ 31.445528] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.445972] [ 31.446111] The buggy address belongs to the object at ffff88800d47f570 [ 31.446111] which belongs to the cache vm_area_struct of size 168 [ 31.447068] The buggy address is located 88 bytes inside of [ 31.447068] freed 168-byte region [ffff88800d47f570, ffff88800d47f618) [ 31.447987] [ 31.448129] The buggy address belongs to the physical page: [ 31.448581] page:0000000029b85c74 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xd47f [ 31.449292] memcg:ffff88800d90ba01 [ 31.449596] anon flags: 0x100000000000200(slab|node=0|zone=1) [ 31.450077] page_type: 0xffffffff() [ 31.450402] raw: 0100000000000200 ffff8880087a0c80 ffffea000025d280 dead000000000003 [ 31.451030] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800d90ba01 [ 31.451674] page dumped because: kasan: bad access detected [ 31.452099] [ 31.452238] Memory state around the buggy address: [ 31.452624] ffff88800d47f480: fc 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 31.453171] ffff88800d47f500: 00 00 00 00 00 00 fc fc fc fc fc fc fc fc fa fb [ 31.453778] >ffff88800d47f580: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 31.454344] ^ [ 31.454784] ffff88800d47f600: fb fb fb fc fc fc fc fc fc fc fc 00 00 00 00 00 [ 31.455331] ffff88800d47f680: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 31.455890] ================================================================== [ 31.456586] Disabling lock debugging due to kernel taint [ 32.985173] BUG: Bad rss-counter state mm:00000000608b8eb8 type:MM_FILEPAGES val:33 [ 32.986158] BUG: Bad rss-counter state mm:00000000608b8eb8 type:MM_ANONPAGES val:22 [ 33.347889] BUG: Bad rss-counter state mm:00000000912b4f1e type:MM_FILEPAGES val:33 [ 33.348516] BUG: Bad rss-counter state mm:00000000912b4f1e type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:25406' (ECDSA) to the list of known hosts. 2023/06/21 09:50:40 fuzzer started 2023/06/21 09:50:40 dialing manager at localhost:36067 2023/06/21 09:50:40 checking machine... 2023/06/21 09:50:40 checking revisions... [ 33.927744] kmemleak: Automatic memory scanning thread ended 2023/06/21 09:50:40 testing simple program... [ 33.970825] cgroup: Unknown subsys name 'net' [ 34.011180] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 09:50:40 Registers: info registers vcpu 0 RAX=0000000000000000 RBX=ffffffff85dfe028 RCX=ffffffff8180c6a1 RDX=0000000000000002 RSI=ffffffff86138e62 RDI=ffffffff85dfe000 RBP=ffffffff85dfe01c RSP=ffff88800cb6f930 R8 =ffffffff86138e62 R9 =ffff88800cb6fa28 R10=0000000000038001 R11=0000000000020d8f R12=ffffffff85dfe024 R13=ffffffff85dfe000 R14=ffffffff85dfe018 R15=dffffc0000000000 RIP=ffffffff8112fc68 RFL=00000212 [----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 00007fafe7363900 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=00007fafe791a618 CR3=0000000010116000 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=dffffc0000000000 RBX=ffff88806cf09a50 RCX=0000000000000002 RDX=1ffff1100d9e134b RSI=ffff88806cf09da8 RDI=ffff88806cf09a58 RBP=ffff88806cf09da8 RSP=ffff88806cf099a8 R8 =0000000000000001 R9 =ffff88806cf09a90 R10=0000000000038001 R11=0000000000020ed2 R12=0000000000000008 R13=ffff88806cf09a98 R14=ffff88806cf09da8 R15=ffff88806cf09a50 RIP=ffffffff81130445 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 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=00007f570f035690 CR3=00000000102b4000 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=2039333a30353a3930203132206e754a XMM01=73732878696e755f6d6170203a5d3033 XMM02=65736f6c63206e6f6973736573203a29 XMM03=755f6d6170203a5d3033325b64687373 XMM04=69662068637573206f4e203a656c6163 XMM05=3a656c696620766e65206e65706f206f XMM06=65733a6468737328766e655f6d617020 XMM07=6b7a79732039333a30353a3930203132 XMM08=3d656e696c646d632022656369767265 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000