syzkaller login: [ 28.697742] BUG: Bad rss-counter state mm:00000000a941f41e type:MM_FILEPAGES val:33 [ 28.699375] BUG: Bad rss-counter state mm:00000000a941f41e type:MM_ANONPAGES val:22 [ 28.876825] ================================================================== [ 28.877720] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 28.878683] Read of size 8 at addr ffff88800d8db798 by task sshd/220 [ 28.879587] [ 28.879804] CPU: 0 PID: 220 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 28.880686] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 28.881755] Call Trace: [ 28.882143] [ 28.882502] dump_stack_lvl+0x91/0xf0 [ 28.883083] print_report+0xcc/0x620 [ 28.883676] ? __virt_addr_valid+0x102/0x340 [ 28.884341] ? vma_interval_tree_remove+0xc75/0xec0 [ 28.885089] ? vma_interval_tree_remove+0xc75/0xec0 [ 28.885831] kasan_report+0xbe/0xf0 [ 28.886398] ? vma_interval_tree_remove+0xc75/0xec0 [ 28.887187] vma_interval_tree_remove+0xc75/0xec0 [ 28.887943] vma_prepare+0xc54/0x11a0 [ 28.888562] __split_vma+0x5af/0x950 [ 28.889143] ? __pfx___split_vma+0x10/0x10 [ 28.889808] ? find_held_lock+0x2c/0x110 [ 28.890463] do_vmi_align_munmap+0x2ba/0x11f0 [ 28.891184] ? lock_is_held_type+0x9f/0x120 [ 28.891867] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 28.892671] ? mtree_range_walk+0x632/0x900 [ 28.893369] ? mas_walk+0x5c7/0x7c0 [ 28.893859] do_vmi_munmap+0x1f1/0x2b0 [ 28.894378] mmap_region+0x1f9/0x2660 [ 28.894887] ? vm_mmap_pgoff+0x15c/0x3a0 [ 28.895417] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 28.896167] ? __pfx_lock_acquire+0x10/0x10 [ 28.896745] ? __pfx_mmap_region+0x10/0x10 [ 28.897302] ? security_mmap_addr+0x7d/0xa0 [ 28.897863] ? get_unmapped_area+0x1f5/0x3f0 [ 28.898432] do_mmap+0x854/0xf00 [ 28.898898] vm_mmap_pgoff+0x1a6/0x3a0 [ 28.899424] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 28.900004] ksys_mmap_pgoff+0x3af/0x500 [ 28.900551] do_syscall_64+0x3f/0x90 [ 28.901060] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 28.901736] RIP: 0033:0x7fd705c49d82 [ 28.902210] 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 [ 28.904444] RSP: 002b:00007ffe89ada148 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 28.905384] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007fd705c49d82 [ 28.906270] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007fd705083000 [ 28.907153] RBP: 00007fd705083000 R08: 0000000000000009 R09: 0000000000001000 [ 28.908036] R10: 0000000000000812 R11: 0000000000000206 R12: 000055f5380abec0 [ 28.908931] R13: 00007ffe89ada160 R14: 00007ffe89ada190 R15: 00007ffe89ada4f0 [ 28.909816] [ 28.910134] [ 28.910354] Allocated by task 212: [ 28.910807] kasan_save_stack+0x22/0x50 [ 28.911334] kasan_set_track+0x25/0x30 [ 28.911849] __kasan_slab_alloc+0x59/0x70 [ 28.912400] kmem_cache_alloc+0x16b/0x370 [ 28.912937] vm_area_dup+0x20/0x160 [ 28.913424] __split_vma+0x170/0x950 [ 28.913915] split_vma+0xc6/0x110 [ 28.914378] mprotect_fixup+0x8d2/0xb30 [ 28.914907] do_mprotect_pkey+0x87e/0xd40 [ 28.915449] __x64_sys_mprotect+0x78/0xc0 [ 28.915991] do_syscall_64+0x3f/0x90 [ 28.916515] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 28.917189] [ 28.917408] Freed by task 188: [ 28.917826] kasan_save_stack+0x22/0x50 [ 28.918341] kasan_set_track+0x25/0x30 [ 28.918859] kasan_save_free_info+0x2b/0x50 [ 28.919415] __kasan_slab_free+0x10a/0x190 [ 28.919976] kmem_cache_free+0x10d/0x4d0 [ 28.920522] rcu_core+0x8c8/0x2860 [ 28.920993] __do_softirq+0x1b7/0x7d4 [ 28.921500] [ 28.921724] Last potentially related work creation: [ 28.922334] kasan_save_stack+0x22/0x50 [ 28.922881] __kasan_record_aux_stack+0x8e/0xa0 [ 28.923479] __call_rcu_common.constprop.0+0x6a/0xb90 [ 28.924165] remove_vma+0x139/0x170 [ 28.924657] do_vmi_align_munmap+0xd4a/0x11f0 [ 28.925236] do_vmi_munmap+0x1f1/0x2b0 [ 28.925748] __vm_munmap+0x138/0x3a0 [ 28.926243] __x64_sys_munmap+0x59/0x80 [ 28.926763] do_syscall_64+0x3f/0x90 [ 28.927261] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 28.927947] [ 28.928171] The buggy address belongs to the object at ffff88800d8db740 [ 28.928171] which belongs to the cache vm_area_struct of size 168 [ 28.929726] The buggy address is located 88 bytes inside of [ 28.929726] freed 168-byte region [ffff88800d8db740, ffff88800d8db7e8) [ 28.931218] [ 28.931441] The buggy address belongs to the physical page: [ 28.932132] page:0000000041951058 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xd8db [ 28.933283] memcg:ffff88800bba8e01 [ 28.933743] flags: 0x100000000000200(slab|node=0|zone=1) [ 28.934417] page_type: 0xffffffff() [ 28.934891] raw: 0100000000000200 ffff8880087a0c80 ffffea00005932c0 dead000000000004 [ 28.935867] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800bba8e01 [ 28.936845] page dumped because: kasan: bad access detected [ 28.937536] [ 28.937769] Memory state around the buggy address: [ 28.938374] ffff88800d8db680: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 28.939282] ffff88800d8db700: fc fc fc fc fc fc fc fc fa fb fb fb fb fb fb fb [ 28.940185] >ffff88800d8db780: fb fb fb fb fb fb fb fb fb fb fb fb fb fc fc fc [ 28.941103] ^ [ 28.941623] ffff88800d8db800: fc fc fc fc fc fa fb fb fb fb fb fb fb fb fb fb [ 28.942499] ffff88800d8db880: fb fb fb fb fb fb fb fb fb fb fc fc fc fc fc fc [ 28.943419] ================================================================== [ 28.944466] Disabling lock debugging due to kernel taint [ 30.943230] BUG: Bad rss-counter state mm:00000000f62506e5 type:MM_FILEPAGES val:33 [ 30.944405] BUG: Bad rss-counter state mm:00000000f62506e5 type:MM_ANONPAGES val:22 [ 31.353726] BUG: Bad rss-counter state mm:0000000054e11d3f type:MM_FILEPAGES val:33 [ 31.354946] BUG: Bad rss-counter state mm:0000000054e11d3f type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:49812' (ECDSA) to the list of known hosts. 2023/06/20 13:18:40 fuzzer started 2023/06/20 13:18:40 dialing manager at localhost:36067 2023/06/20 13:18:40 checking machine... 2023/06/20 13:18:40 checking revisions... [ 32.007015] kmemleak: Automatic memory scanning thread ended 2023/06/20 13:18:40 testing simple program... [ 32.058090] cgroup: Unknown subsys name 'net' [ 32.101047] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 13:18:39 Registers: info registers vcpu 0 RAX=0000000000000007 RBX=0000000000000f48 RCX=ffffffff8366282e RDX=0000000000000000 RSI=0000000000001ec0 RDI=0000000000000f48 RBP=ffff88800dd04780 RSP=ffff888016ac73e8 R8 =0000000000000005 R9 =0000000000000000 R10=0000000000000000 R11=563412feff005450 R12=0000000000000014 R13=ffff888019c50f34 R14=0000000000001ec0 R15=0000000000000f8c RIP=ffffffff814c0348 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 00007fd9c30b4900 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=00007fd9c366b618 CR3=0000000010106000 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=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=00007f1450e98d80 CR3=000000000eb98000 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=2039333a38313a3331203032206e754a XMM01=73732878696e755f6d6170203a5d3932 XMM02=65736f6c63206e6f6973736573203a29 XMM03=755f6d6170203a5d3932325b64687373 XMM04=69662068637573206f4e203a656c6163 XMM05=3a656c696620766e65206e65706f206f XMM06=65733a6468737328766e655f6d617020 XMM07=6b7a79732039333a38313a3331203032 XMM08=3d656e696c646d632022656369767265 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000