syzkaller login: [ 31.136915] BUG: Bad rss-counter state mm:000000002e524fb9 type:MM_FILEPAGES val:33 [ 31.138221] BUG: Bad rss-counter state mm:000000002e524fb9 type:MM_ANONPAGES val:22 [ 31.300381] ================================================================== [ 31.301288] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 31.302235] Read of size 8 at addr ffff88801a29b4e0 by task sshd/219 [ 31.303002] [ 31.303316] CPU: 0 PID: 219 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 31.304203] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 31.305197] Call Trace: [ 31.305555] [ 31.305870] dump_stack_lvl+0x91/0xf0 [ 31.306370] print_report+0xcc/0x620 [ 31.306857] ? __virt_addr_valid+0x102/0x340 [ 31.307422] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.308045] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.308672] kasan_report+0xbe/0xf0 [ 31.309146] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.309789] vma_interval_tree_remove+0xc75/0xec0 [ 31.310418] vma_prepare+0xc54/0x11a0 [ 31.310897] __split_vma+0x5af/0x950 [ 31.311375] ? __pfx___split_vma+0x10/0x10 [ 31.311904] ? find_held_lock+0x2c/0x110 [ 31.312432] do_vmi_align_munmap+0x2ba/0x11f0 [ 31.313004] ? lock_is_held_type+0x9f/0x120 [ 31.313556] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 31.314181] ? mtree_range_walk+0x632/0x900 [ 31.314740] ? mas_walk+0x5c7/0x7c0 [ 31.315219] do_vmi_munmap+0x1f1/0x2b0 [ 31.315716] mmap_region+0x1f9/0x2660 [ 31.316201] ? vm_mmap_pgoff+0x15c/0x3a0 [ 31.316717] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 31.317436] ? __pfx_lock_acquire+0x10/0x10 [ 31.317991] ? __pfx_mmap_region+0x10/0x10 [ 31.318518] ? security_mmap_addr+0x7d/0xa0 [ 31.319054] ? get_unmapped_area+0x1f5/0x3f0 [ 31.319614] do_mmap+0x854/0xf00 [ 31.320050] vm_mmap_pgoff+0x1a6/0x3a0 [ 31.320544] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 31.321107] ksys_mmap_pgoff+0x3af/0x500 [ 31.321615] do_syscall_64+0x3f/0x90 [ 31.322104] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.322754] RIP: 0033:0x7f60e06e6d82 [ 31.323214] 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 [ 31.325346] RSP: 002b:00007fff8de72218 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 31.326257] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f60e06e6d82 [ 31.327106] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f60dfb20000 [ 31.327953] RBP: 00007f60dfb20000 R08: 0000000000000009 R09: 0000000000001000 [ 31.328805] R10: 0000000000000812 R11: 0000000000000206 R12: 000055b499c6eec0 [ 31.329657] R13: 00007fff8de72230 R14: 00007fff8de72260 R15: 00007fff8de725c0 [ 31.330538] [ 31.330832] [ 31.331049] Allocated by task 212: [ 31.331476] kasan_save_stack+0x22/0x50 [ 31.331982] kasan_set_track+0x25/0x30 [ 31.332481] __kasan_slab_alloc+0x59/0x70 [ 31.333003] kmem_cache_alloc+0x16b/0x370 [ 31.333521] vm_area_dup+0x20/0x160 [ 31.334023] __split_vma+0x170/0x950 [ 31.334493] split_vma+0xc6/0x110 [ 31.334938] mprotect_fixup+0x8d2/0xb30 [ 31.335441] do_mprotect_pkey+0x87e/0xd40 [ 31.335965] __x64_sys_mprotect+0x78/0xc0 [ 31.336486] do_syscall_64+0x3f/0x90 [ 31.336960] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.337605] [ 31.337830] Freed by task 19: [ 31.338217] kasan_save_stack+0x22/0x50 [ 31.338717] kasan_set_track+0x25/0x30 [ 31.339213] kasan_save_free_info+0x2b/0x50 [ 31.339727] __kasan_slab_free+0x10a/0x190 [ 31.340251] kmem_cache_free+0x10d/0x4d0 [ 31.340745] rcu_core+0x8c8/0x2860 [ 31.341181] __do_softirq+0x1b7/0x7d4 [ 31.341656] [ 31.341890] Last potentially related work creation: [ 31.342457] kasan_save_stack+0x22/0x50 [ 31.342949] __kasan_record_aux_stack+0x8e/0xa0 [ 31.343505] __call_rcu_common.constprop.0+0x6a/0xb90 [ 31.344135] remove_vma+0x139/0x170 [ 31.344577] do_vmi_align_munmap+0xd4a/0x11f0 [ 31.345116] do_vmi_munmap+0x1f1/0x2b0 [ 31.345589] __vm_munmap+0x138/0x3a0 [ 31.346044] __x64_sys_munmap+0x59/0x80 [ 31.346522] do_syscall_64+0x3f/0x90 [ 31.346981] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.347604] [ 31.347814] The buggy address belongs to the object at ffff88801a29b488 [ 31.347814] which belongs to the cache vm_area_struct of size 168 [ 31.349229] The buggy address is located 88 bytes inside of [ 31.349229] freed 168-byte region [ffff88801a29b488, ffff88801a29b530) [ 31.350588] [ 31.350801] The buggy address belongs to the physical page: [ 31.351445] page:00000000013782e2 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x1a29b [ 31.352496] memcg:ffff88800fc8e601 [ 31.352909] flags: 0x100000000000200(slab|node=0|zone=1) [ 31.353534] page_type: 0xffffffff() [ 31.353974] raw: 0100000000000200 ffff8880087a0c80 dead000000000122 0000000000000000 [ 31.354863] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800fc8e601 [ 31.355738] page dumped because: kasan: bad access detected [ 31.356371] [ 31.356579] Memory state around the buggy address: [ 31.357141] ffff88801a29b380: fc fc fc fc 00 00 00 00 00 00 00 00 00 00 00 00 [ 31.358042] ffff88801a29b400: 00 00 00 00 00 00 00 00 00 fc fc fc fc fc fc fc [ 31.358903] >ffff88801a29b480: fc fa fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 31.359754] ^ [ 31.360512] ffff88801a29b500: fb fb fb fb fb fb fc fc fc fc fc fc fc fc fa fb [ 31.361379] ffff88801a29b580: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 31.362240] ================================================================== [ 31.363415] Disabling lock debugging due to kernel taint [ 33.317671] BUG: Bad rss-counter state mm:00000000e8047e16 type:MM_FILEPAGES val:33 [ 33.318885] BUG: Bad rss-counter state mm:00000000e8047e16 type:MM_ANONPAGES val:22 [ 33.720865] BUG: Bad rss-counter state mm:0000000042a63b82 type:MM_FILEPAGES val:33 [ 33.721420] BUG: Bad rss-counter state mm:0000000042a63b82 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:44473' (ECDSA) to the list of known hosts. 2023/06/21 01:04:28 fuzzer started 2023/06/21 01:04:28 dialing manager at localhost:36067 2023/06/21 01:04:28 checking machine... 2023/06/21 01:04:28 checking revisions... [ 34.501200] kmemleak: Automatic memory scanning thread ended 2023/06/21 01:04:28 testing simple program... [ 34.557035] cgroup: Unknown subsys name 'net' [ 34.610234] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 01:04:27 Registers: info registers vcpu 0 RAX=ffff88806ce35000 RBX=0000000000000000 RCX=ffffffff8451250e RDX=ffffed100d9c6a01 RSI=0000000000000004 RDI=ffffffff81288ac5 RBP=dffffc0000000000 RSP=ffffffff85407e10 R8 =0000000000000000 R9 =ffffed100d9c6a00 R10=ffff88806ce35003 R11=ffff888008c04000 R12=ffffffff85d3d350 R13=1ffffffff0a80fc7 R14=0000000000000000 R15=0000000000000000 RIP=ffffffff8451349f 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 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=00007ffd9613f618 CR3=000000000dc12000 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=2037323a34303a3130203132206e754a XMM01=657463656e6e6f63736944203a5d3832 XMM02=302e303120746f6f722072657375206d XMM03=203a5d3832325b646873732072656c6c XMM04=69662068637573206f4e203a656c6163 XMM05=3a656c696620766e65206e65706f206f XMM06=65733a6468737328766e655f6d617020 XMM07=6b7a79732037323a34303a3130203132 XMM08=7020303d64696720303d64697520612f XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=ffff88806cf35000 RBX=0000000000000001 RCX=ffffffff8451250e RDX=ffffed100d9e6a01 RSI=0000000000000004 RDI=ffffffff81288ac5 RBP=dffffc0000000000 RSP=ffff888008e07e70 R8 =0000000000000000 R9 =ffffed100d9e6a00 R10=ffff88806cf35003 R11=ffff888008c04400 R12=ffffffff85d3d350 R13=1ffff110011c0fd3 R14=0000000000000000 R15=0000000000000000 RIP=ffffffff8451349f 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=00007f52835e2540 CR3=000000000d5d4000 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=1d70eaea84ed4b9bc14e96463189f18d XMM02=000000000011a890ec2efd57dc4c00df XMM03=00000000001221d8fc9c183775f96dae XMM04=dbad18cfbff34f1700000000000ae988 XMM05=dfcdbad4f1609c370000000000132050 XMM06=7a533f573b52452e0000000000130eb8 XMM07=e042d86d42eb936e0000000000122458 XMM08=fc9c183775f96dae000000000011a8f0 XMM09=00000000000000000000000000000000 XMM10=20200000000020202020202020200000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000