syzkaller login: [ 31.240338] BUG: Bad rss-counter state mm:00000000b1fe70cc type:MM_FILEPAGES val:33 [ 31.241488] BUG: Bad rss-counter state mm:00000000b1fe70cc type:MM_ANONPAGES val:22 [ 31.282056] ================================================================== [ 31.283287] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 31.284596] Read of size 8 at addr ffff88800ebae6b0 by task sshd/220 [ 31.285523] [ 31.285801] CPU: 1 PID: 220 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 31.286803] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 31.288037] Call Trace: [ 31.288395] <TASK> [ 31.288748] dump_stack_lvl+0x91/0xf0 [ 31.289346] print_report+0xcc/0x620 [ 31.289910] ? __virt_addr_valid+0x102/0x340 [ 31.290565] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.291307] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.292050] kasan_report+0xbe/0xf0 [ 31.292653] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.293390] vma_interval_tree_remove+0xc75/0xec0 [ 31.294126] vma_prepare+0xc54/0x11a0 [ 31.294679] __split_vma+0x5af/0x950 [ 31.295176] ? __pfx___split_vma+0x10/0x10 [ 31.295931] ? find_held_lock+0x2c/0x110 [ 31.296513] do_vmi_align_munmap+0x2ba/0x11f0 [ 31.297132] ? lock_is_held_type+0x9f/0x120 [ 31.297729] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 31.298396] ? mtree_range_walk+0x632/0x900 [ 31.299004] ? mas_walk+0x5c7/0x7c0 [ 31.299528] do_vmi_munmap+0x1f1/0x2b0 [ 31.300072] mmap_region+0x1f9/0x2660 [ 31.300613] ? vm_mmap_pgoff+0x15c/0x3a0 [ 31.301184] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 31.301969] ? __pfx_lock_acquire+0x10/0x10 [ 31.302545] ? __pfx_mmap_region+0x10/0x10 [ 31.303105] ? security_mmap_addr+0x7d/0xa0 [ 31.303686] ? get_unmapped_area+0x1f5/0x3f0 [ 31.304276] do_mmap+0x854/0xf00 [ 31.304759] vm_mmap_pgoff+0x1a6/0x3a0 [ 31.305288] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 31.305890] ksys_mmap_pgoff+0x3af/0x500 [ 31.306431] do_syscall_64+0x3f/0x90 [ 31.306936] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.307640] RIP: 0033:0x7f8f03ec9d82 [ 31.308135] 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 [ 31.310400] RSP: 002b:00007ffe24691c18 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 31.311408] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f8f03ec9d82 [ 31.312319] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f8f03303000 [ 31.313237] RBP: 00007f8f03303000 R08: 0000000000000009 R09: 0000000000001000 [ 31.314152] R10: 0000000000000812 R11: 0000000000000206 R12: 000056295371cec0 [ 31.315074] R13: 00007ffe24691c30 R14: 00007ffe24691c60 R15: 00007ffe24691fc0 [ 31.316010] </TASK> [ 31.316324] [ 31.316554] Allocated by task 213: [ 31.317018] kasan_save_stack+0x22/0x50 [ 31.317565] kasan_set_track+0x25/0x30 [ 31.318096] __kasan_slab_alloc+0x59/0x70 [ 31.318641] kmem_cache_alloc+0x16b/0x370 [ 31.319181] vm_area_dup+0x20/0x160 [ 31.319857] __split_vma+0x170/0x950 [ 31.320407] split_vma+0xc6/0x110 [ 31.320925] mprotect_fixup+0x8d2/0xb30 [ 31.321516] do_mprotect_pkey+0x87e/0xd40 [ 31.322115] __x64_sys_mprotect+0x78/0xc0 [ 31.322730] do_syscall_64+0x3f/0x90 [ 31.323312] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.324049] [ 31.324307] Freed by task 213: [ 31.324752] kasan_save_stack+0x22/0x50 [ 31.325439] kasan_set_track+0x25/0x30 [ 31.326020] kasan_save_free_info+0x2b/0x50 [ 31.326626] __kasan_slab_free+0x10a/0x190 [ 31.327285] kmem_cache_free+0x10d/0x4d0 [ 31.327913] rcu_core+0x8c8/0x2860 [ 31.328463] __do_softirq+0x1b7/0x7d4 [ 31.329048] [ 31.329313] Last potentially related work creation: [ 31.330041] kasan_save_stack+0x22/0x50 [ 31.330668] __kasan_record_aux_stack+0x8e/0xa0 [ 31.331383] __call_rcu_common.constprop.0+0x6a/0xb90 [ 31.332172] remove_vma+0x139/0x170 [ 31.332733] do_vmi_align_munmap+0xd4a/0x11f0 [ 31.333404] do_vmi_munmap+0x1f1/0x2b0 [ 31.334005] __vm_munmap+0x138/0x3a0 [ 31.334581] __x64_sys_munmap+0x59/0x80 [ 31.335188] do_syscall_64+0x3f/0x90 [ 31.335808] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.336438] [ 31.336648] The buggy address belongs to the object at ffff88800ebae658 [ 31.336648] which belongs to the cache vm_area_struct of size 168 [ 31.338067] The buggy address is located 88 bytes inside of [ 31.338067] freed 168-byte region [ffff88800ebae658, ffff88800ebae700) [ 31.339436] [ 31.339648] The buggy address belongs to the physical page: [ 31.340283] page:0000000046ec669e refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xebae [ 31.341339] memcg:ffff88800e6e2701 [ 31.341755] flags: 0x100000000000200(slab|node=0|zone=1) [ 31.342382] page_type: 0xffffffff() [ 31.342820] raw: 0100000000000200 ffff8880087a0c80 ffffea00003aa8c0 dead000000000008 [ 31.343715] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800e6e2701 [ 31.344595] page dumped because: kasan: bad access detected [ 31.345228] [ 31.345435] Memory state around the buggy address: [ 31.346000] ffff88800ebae580: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 31.346824] ffff88800ebae600: fb fb fb fc fc fc fc fc fc fc fc fa fb fb fb fb [ 31.347668] >ffff88800ebae680: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 31.348495] ^ [ 31.349052] ffff88800ebae700: fc fc fc fc fc fc fc fc fa fb fb fb fb fb fb fb [ 31.349876] ffff88800ebae780: fb fb fb fb fb fb fb fb fb fb fb fb fb fc fc fc [ 31.350710] ================================================================== [ 31.351686] Disabling lock debugging due to kernel taint [ 33.368753] BUG: Bad rss-counter state mm:00000000627fda0f type:MM_FILEPAGES val:33 [ 33.369962] BUG: Bad rss-counter state mm:00000000627fda0f type:MM_ANONPAGES val:22 [ 33.916632] BUG: Bad rss-counter state mm:0000000029c03b03 type:MM_FILEPAGES val:33 [ 33.917801] BUG: Bad rss-counter state mm:0000000029c03b03 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:33731' (ECDSA) to the list of known hosts. 2023/06/20 16:51:36 fuzzer started 2023/06/20 16:51:36 dialing manager at localhost:36067 2023/06/20 16:51:36 checking machine... 2023/06/20 16:51:36 checking revisions... [ 34.593639] kmemleak: Automatic memory scanning thread ended 2023/06/20 16:51:36 testing simple program... [ 34.638805] cgroup: Unknown subsys name 'net' [ 34.704936] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 16:51:36 Registers: info registers vcpu 0 RAX=0000000000000000 RBX=0000000000000000 RCX=ffffffff83c60bd1 RDX=ffff888010103680 RSI=00000000000000ff RDI=00000000000000ff RBP=0000000000000000 RSP=ffff88800c5c76a0 R8 =0000000000000005 R9 =00000000000000ff R10=00000000000000fe R11=0000098500000985 R12=0000000000000000 R13=00000000000000ff R14=dffffc0000000000 R15=0000000000000001 RIP=ffffffff814c0408 RFL=00000206 [-----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 00007f72a724f900 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=00007f72a7806618 CR3=0000000009d46000 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=dffffc0000000000 RBX=ffff88806cf09a98 RCX=0000000000000001 RDX=1ffff1100d9e135e RSI=ffff8880068179e8 RDI=ffff88806cf09a98 RBP=ffff88806cf09af0 RSP=ffff88806cf09a80 R8 =0000000000000001 R9 =ffff88806cf09ad8 R10=0000000000038001 R11=00000000000237cd R12=ffff88806cf09b60 R13=0000000000000000 R14=ffff888006849b40 R15=ffff88800d9d9080 RIP=ffffffff8113038e 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 00007f17b35e4900 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=00007f17b2a7a480 CR3=000000000d69c000 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=ffffffffffffffffffffffffffffffff XMM01=30306234386136303638616663356134 XMM02=38303062343861363036386166633561 XMM03=2f6c616e72756f6a2f676f6c2f6e7572 XMM04=4c915f160e60093000000000000ae988 XMM05=64018e021d97a40b0000000000133198 XMM06=4fda316b135da52b0000000000131f88 XMM07=00000000000000000000000000000000 XMM08=415453454d49545f454d49544c414552 XMM09=00000000000000000000000000000000 XMM10=20200000000020202020202020200000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000