syzkaller login: [ 51.821685] BUG: Bad rss-counter state mm:0000000027a0d4b2 type:MM_FILEPAGES val:33 [ 51.823019] BUG: Bad rss-counter state mm:0000000027a0d4b2 type:MM_ANONPAGES val:22 [ 51.872753] ================================================================== [ 51.873794] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 51.875114] Read of size 8 at addr ffff888009460c20 by task sshd/219 [ 51.876113] [ 51.876447] CPU: 1 PID: 219 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 51.877584] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 51.878844] Call Trace: [ 51.879256] [ 51.879626] dump_stack_lvl+0x91/0xf0 [ 51.880263] print_report+0xcc/0x620 [ 51.880926] ? __virt_addr_valid+0x102/0x340 [ 51.881665] ? vma_interval_tree_remove+0xc75/0xec0 [ 51.882487] ? vma_interval_tree_remove+0xc75/0xec0 [ 51.883303] kasan_report+0xbe/0xf0 [ 51.883938] ? vma_interval_tree_remove+0xc75/0xec0 [ 51.884774] vma_interval_tree_remove+0xc75/0xec0 [ 51.885583] vma_prepare+0xc54/0x11a0 [ 51.886231] __split_vma+0x5af/0x950 [ 51.886857] ? __pfx___split_vma+0x10/0x10 [ 51.887561] ? find_held_lock+0x2c/0x110 [ 51.888265] do_vmi_align_munmap+0x2ba/0x11f0 [ 51.889054] ? lock_is_held_type+0x9f/0x120 [ 51.889775] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 51.890591] ? mtree_range_walk+0x632/0x900 [ 51.891339] ? mas_walk+0x5c7/0x7c0 [ 51.891972] do_vmi_munmap+0x1f1/0x2b0 [ 51.892651] mmap_region+0x1f9/0x2660 [ 51.893299] ? vm_mmap_pgoff+0x15c/0x3a0 [ 51.893995] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 51.894964] ? __pfx_lock_acquire+0x10/0x10 [ 51.895686] ? __pfx_mmap_region+0x10/0x10 [ 51.896425] ? security_mmap_addr+0x7d/0xa0 [ 51.897147] ? get_unmapped_area+0x1f5/0x3f0 [ 51.897884] do_mmap+0x854/0xf00 [ 51.898481] vm_mmap_pgoff+0x1a6/0x3a0 [ 51.899150] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 51.899904] ksys_mmap_pgoff+0x3af/0x500 [ 51.900596] do_syscall_64+0x3f/0x90 [ 51.901239] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 51.902107] RIP: 0033:0x7f9ace1f0d82 [ 51.902720] 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 [ 51.905549] RSP: 002b:00007fff4ae9ffc8 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 51.906648] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f9ace1f0d82 [ 51.907674] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f9acd62a000 [ 51.908717] RBP: 00007f9acd62a000 R08: 0000000000000009 R09: 0000000000001000 [ 51.909554] R10: 0000000000000812 R11: 0000000000000206 R12: 00005610208a1ec0 [ 51.910385] R13: 00007fff4ae9ffe0 R14: 00007fff4aea0010 R15: 00007fff4aea0370 [ 51.911236] [ 51.911524] [ 51.911736] Allocated by task 212: [ 51.912155] kasan_save_stack+0x22/0x50 [ 51.912666] kasan_set_track+0x25/0x30 [ 51.913155] __kasan_slab_alloc+0x59/0x70 [ 51.913670] kmem_cache_alloc+0x16b/0x370 [ 51.914237] vm_area_dup+0x20/0x160 [ 51.914689] __split_vma+0x170/0x950 [ 51.915156] split_vma+0xc6/0x110 [ 51.915590] mprotect_fixup+0x8d2/0xb30 [ 51.916091] do_mprotect_pkey+0x87e/0xd40 [ 51.917189] __x64_sys_mprotect+0x78/0xc0 [ 51.917870] do_syscall_64+0x3f/0x90 [ 51.918453] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 51.919263] [ 51.919533] Freed by task 200: [ 51.920015] kasan_save_stack+0x22/0x50 [ 51.920652] kasan_set_track+0x25/0x30 [ 51.921146] kasan_save_free_info+0x2b/0x50 [ 51.921677] __kasan_slab_free+0x10a/0x190 [ 51.922208] kmem_cache_free+0x10d/0x4d0 [ 51.922725] rcu_core+0x8c8/0x2860 [ 51.923167] __do_softirq+0x1b7/0x7d4 [ 51.923640] [ 51.923861] Last potentially related work creation: [ 51.924456] kasan_save_stack+0x22/0x50 [ 51.924961] __kasan_record_aux_stack+0x8e/0xa0 [ 51.925532] __call_rcu_common.constprop.0+0x6a/0xb90 [ 51.926173] remove_vma+0x139/0x170 [ 51.926625] do_vmi_align_munmap+0xd4a/0x11f0 [ 51.927185] do_vmi_munmap+0x1f1/0x2b0 [ 51.927677] __vm_munmap+0x138/0x3a0 [ 51.928152] __x64_sys_munmap+0x59/0x80 [ 51.928652] do_syscall_64+0x3f/0x90 [ 51.929128] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 51.929766] [ 51.929980] Second to last potentially related work creation: [ 51.930678] kasan_save_stack+0x22/0x50 [ 51.931185] __kasan_record_aux_stack+0x8e/0xa0 [ 51.931760] __call_rcu_common.constprop.0+0x6a/0xb90 [ 51.932421] remove_vma+0x139/0x170 [ 51.932882] do_vmi_align_munmap+0xd4a/0x11f0 [ 51.933445] do_vmi_munmap+0x1f1/0x2b0 [ 51.933942] mmap_region+0x1f9/0x2660 [ 51.934417] do_mmap+0x854/0xf00 [ 51.934848] vm_mmap_pgoff+0x1a6/0x3a0 [ 51.935338] ksys_mmap_pgoff+0x3af/0x500 [ 51.935841] do_syscall_64+0x3f/0x90 [ 51.936317] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 51.936960] [ 51.937175] The buggy address belongs to the object at ffff888009460bc8 [ 51.937175] which belongs to the cache vm_area_struct of size 168 [ 51.938656] The buggy address is located 88 bytes inside of [ 51.938656] freed 168-byte region [ffff888009460bc8, ffff888009460c70) [ 51.940082] [ 51.940299] The buggy address belongs to the physical page: [ 51.940997] page:000000005fdfb59a refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x9460 [ 51.942087] memcg:ffff88800ec4f801 [ 51.942514] flags: 0x100000000000200(slab|node=0|zone=1) [ 51.943172] page_type: 0xffffffff() [ 51.943626] raw: 0100000000000200 ffff88800879fc80 ffffea000030da80 dead000000000008 [ 51.944564] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800ec4f801 [ 51.945478] page dumped because: kasan: bad access detected [ 51.946137] [ 51.946357] Memory state around the buggy address: [ 51.946948] ffff888009460b00: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 51.947806] ffff888009460b80: 00 fc fc fc fc fc fc fc fc fa fb fb fb fb fb fb [ 51.948697] >ffff888009460c00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fc fc [ 51.949556] ^ [ 51.950097] ffff888009460c80: fc fc fc fc fc fc 00 00 00 00 00 00 00 00 00 00 [ 51.950959] ffff888009460d00: 00 00 00 00 00 00 00 00 00 00 00 fc fc fc fc fc [ 51.951821] ================================================================== [ 51.952850] Disabling lock debugging due to kernel taint [ 54.101504] BUG: Bad rss-counter state mm:00000000d7d67ad4 type:MM_FILEPAGES val:33 [ 54.102516] BUG: Bad rss-counter state mm:00000000d7d67ad4 type:MM_ANONPAGES val:22 [ 54.582895] BUG: Bad rss-counter state mm:0000000006d42b00 type:MM_FILEPAGES val:33 [ 54.583900] BUG: Bad rss-counter state mm:0000000006d42b00 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:51334' (ECDSA) to the list of known hosts. 2023/06/19 18:54:28 fuzzer started 2023/06/19 18:54:29 dialing manager at localhost:44161 2023/06/19 18:54:29 checking machine... 2023/06/19 18:54:29 checking revisions... [ 55.288957] kmemleak: Automatic memory scanning thread ended 2023/06/19 18:54:29 testing simple program... [ 55.340055] cgroup: Unknown subsys name 'net' [ 55.399498] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 18:54:07 Registers: info registers vcpu 0 RAX=ffff88806ce35000 RBX=0000000000000000 RCX=ffffffff8450c50e RDX=ffffed100d9c6a01 RSI=0000000000000004 RDI=ffffffff812889a5 RBP=dffffc0000000000 RSP=ffffffff85407e10 R8 =0000000000000000 R9 =ffffed100d9c6a00 R10=ffff88806ce35003 R11=ffff888008c58000 R12=ffffffff85d3bed0 R13=1ffffffff0a80fc7 R14=0000000000000000 R15=0000000000000000 RIP=ffffffff8450d49f 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=00007f2af72c7010 CR3=000000000dd32000 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=2038323a34353a3831203931206e754a XMM01=73732878696e755f6d6170203a5d3832 XMM02=65736f6c63206e6f6973736573203a29 XMM03=755f6d6170203a5d3832325b64687373 XMM04=69662068637573206f4e203a656c6163 XMM05=3a656c696620766e65206e65706f206f XMM06=65733a6468737328766e655f6d617020 XMM07=6b7a79732038323a34353a3831203931 XMM08=3d656e696c646d632022656369767265 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=0000000000000001 RBX=ffff88806cf09a70 RCX=ffffffff86137501 RDX=1ffff1100d9e1359 RSI=0000000000000000 RDI=ffffffff8180ee7e RBP=ffff88806cf09ac8 RSP=ffff88806cf09a58 R8 =ffffffff8613751e R9 =ffff88806cf09ab0 R10=0000000000038001 R11=0000000000020d8a R12=ffff88806cf09b38 R13=0000000000000000 R14=ffff88800e0bb680 R15=ffff88800ca12680 RIP=ffffffff81130399 RFL=00000202 [-------] 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 00007f9c2b7ab900 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=00007f9c2b78a020 CR3=000000000e71a000 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=652022746f6f72223d74636361207469 XMM02=3d6c616e696d72657420322e322e302e XMM03=3d656d616e74736f682022646873732f XMM04=40404040404040404040404040404040 XMM05=5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a XMM06=20202020202020202020202020202020 XMM07=00000000000000000000000000000000 XMM08=652075253d64692073253d706f000000 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000