syzkaller login: [ 39.533972] BUG: Bad rss-counter state mm:00000000cc7f2cf2 type:MM_FILEPAGES val:33 [ 39.535038] BUG: Bad rss-counter state mm:00000000cc7f2cf2 type:MM_ANONPAGES val:22 [ 39.667122] ================================================================== [ 39.667969] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 39.668847] Read of size 8 at addr ffff88800eb48880 by task sshd/219 [ 39.669551] [ 39.669752] CPU: 1 PID: 219 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 39.670617] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 39.671822] Call Trace: [ 39.672136] [ 39.672395] dump_stack_lvl+0x91/0xf0 [ 39.672842] print_report+0xcc/0x620 [ 39.673292] ? __virt_addr_valid+0x102/0x340 [ 39.673818] ? vma_interval_tree_remove+0xc75/0xec0 [ 39.674410] ? vma_interval_tree_remove+0xc75/0xec0 [ 39.675004] kasan_report+0xbe/0xf0 [ 39.675445] ? vma_interval_tree_remove+0xc75/0xec0 [ 39.676031] vma_interval_tree_remove+0xc75/0xec0 [ 39.676588] vma_prepare+0xc54/0x11a0 [ 39.677035] __split_vma+0x5af/0x950 [ 39.677472] ? __pfx___split_vma+0x10/0x10 [ 39.677962] ? find_held_lock+0x2c/0x110 [ 39.678462] do_vmi_align_munmap+0x2ba/0x11f0 [ 39.679005] ? lock_is_held_type+0x9f/0x120 [ 39.679511] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 39.680097] ? mtree_range_walk+0x632/0x900 [ 39.680610] ? mas_walk+0x5c7/0x7c0 [ 39.681064] do_vmi_munmap+0x1f1/0x2b0 [ 39.681519] mmap_region+0x1f9/0x2660 [ 39.681983] ? vm_mmap_pgoff+0x15c/0x3a0 [ 39.682477] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 39.683166] ? __pfx_lock_acquire+0x10/0x10 [ 39.683678] ? __pfx_mmap_region+0x10/0x10 [ 39.684189] ? security_mmap_addr+0x7d/0xa0 [ 39.684697] ? get_unmapped_area+0x1f5/0x3f0 [ 39.685238] do_mmap+0x854/0xf00 [ 39.685653] vm_mmap_pgoff+0x1a6/0x3a0 [ 39.686132] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 39.686685] ksys_mmap_pgoff+0x3af/0x500 [ 39.687189] do_syscall_64+0x3f/0x90 [ 39.687642] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 39.688263] RIP: 0033:0x7f6e1c0c8d82 [ 39.688690] 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 [ 39.690752] RSP: 002b:00007ffdb7f0d4b8 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 39.691617] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f6e1c0c8d82 [ 39.692418] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f6e1b502000 [ 39.693223] RBP: 00007f6e1b502000 R08: 0000000000000009 R09: 0000000000001000 [ 39.694025] R10: 0000000000000812 R11: 0000000000000206 R12: 000055ccbc04eec0 [ 39.694838] R13: 00007ffdb7f0d4d0 R14: 00007ffdb7f0d500 R15: 00007ffdb7f0d860 [ 39.695657] [ 39.695936] [ 39.696152] Allocated by task 212: [ 39.696548] kasan_save_stack+0x22/0x50 [ 39.697045] kasan_set_track+0x25/0x30 [ 39.697501] __kasan_slab_alloc+0x59/0x70 [ 39.698008] kmem_cache_alloc+0x16b/0x370 [ 39.698512] vm_area_dup+0x20/0x160 [ 39.698936] __split_vma+0x170/0x950 [ 39.699394] split_vma+0xc6/0x110 [ 39.699802] mprotect_fixup+0x8d2/0xb30 [ 39.700288] do_mprotect_pkey+0x87e/0xd40 [ 39.700784] __x64_sys_mprotect+0x78/0xc0 [ 39.701282] do_syscall_64+0x3f/0x90 [ 39.701722] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 39.702322] [ 39.702535] Freed by task 212: [ 39.702902] kasan_save_stack+0x22/0x50 [ 39.703396] kasan_set_track+0x25/0x30 [ 39.703862] kasan_save_free_info+0x2b/0x50 [ 39.704372] __kasan_slab_free+0x10a/0x190 [ 39.704867] kmem_cache_free+0x10d/0x4d0 [ 39.705355] rcu_core+0x8c8/0x2860 [ 39.705778] __do_softirq+0x1b7/0x7d4 [ 39.706246] [ 39.706459] Last potentially related work creation: [ 39.707020] kasan_save_stack+0x22/0x50 [ 39.707495] __kasan_record_aux_stack+0x8e/0xa0 [ 39.708042] __call_rcu_common.constprop.0+0x6a/0xb90 [ 39.708646] remove_vma+0x139/0x170 [ 39.709079] do_vmi_align_munmap+0xd4a/0x11f0 [ 39.709599] do_vmi_munmap+0x1f1/0x2b0 [ 39.710070] __vm_munmap+0x138/0x3a0 [ 39.710532] __x64_sys_munmap+0x59/0x80 [ 39.711024] do_syscall_64+0x3f/0x90 [ 39.711471] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 39.712128] [ 39.712426] Second to last potentially related work creation: [ 39.713096] kasan_save_stack+0x22/0x50 [ 39.713564] __kasan_record_aux_stack+0x8e/0xa0 [ 39.714121] __call_rcu_common.constprop.0+0x6a/0xb90 [ 39.714746] remove_vma+0x139/0x170 [ 39.715188] do_vmi_align_munmap+0xd4a/0x11f0 [ 39.715713] do_vmi_munmap+0x1f1/0x2b0 [ 39.716181] mmap_region+0x1f9/0x2660 [ 39.716641] do_mmap+0x854/0xf00 [ 39.717059] vm_mmap_pgoff+0x1a6/0x3a0 [ 39.717527] ksys_mmap_pgoff+0x3af/0x500 [ 39.718033] do_syscall_64+0x3f/0x90 [ 39.718510] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 39.719145] [ 39.719347] The buggy address belongs to the object at ffff88800eb48828 [ 39.719347] which belongs to the cache vm_area_struct of size 168 [ 39.720737] The buggy address is located 88 bytes inside of [ 39.720737] freed 168-byte region [ffff88800eb48828, ffff88800eb488d0) [ 39.722086] [ 39.722291] The buggy address belongs to the physical page: [ 39.722925] page:00000000f7783b2b refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xeb48 [ 39.723997] memcg:ffff88800e316c01 [ 39.724399] anon flags: 0x100000000000200(slab|node=0|zone=1) [ 39.725068] page_type: 0xffffffff() [ 39.725492] raw: 0100000000000200 ffff88800879fc80 ffffea00002e3e80 dead000000000007 [ 39.726381] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800e316c01 [ 39.727283] page dumped because: kasan: bad access detected [ 39.727910] [ 39.728129] Memory state around the buggy address: [ 39.728676] ffff88800eb48780: 00 00 00 00 00 00 00 00 00 00 00 00 00 fc fc fc [ 39.729494] ffff88800eb48800: fc fc fc fc fc fa fb fb fb fb fb fb fb fb fb fb [ 39.730321] >ffff88800eb48880: fb fb fb fb fb fb fb fb fb fb fc fc fc fc fc fc [ 39.731157] ^ [ 39.731548] ffff88800eb48900: fc fc 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 39.732369] ffff88800eb48980: 00 00 00 00 00 00 00 fc fc fc fc fc fc fc fc 00 [ 39.733190] ================================================================== [ 39.734203] Disabling lock debugging due to kernel taint [ 41.564743] BUG: Bad rss-counter state mm:00000000c2556e74 type:MM_FILEPAGES val:33 [ 41.565916] BUG: Bad rss-counter state mm:00000000c2556e74 type:MM_ANONPAGES val:22 [ 42.002924] BUG: Bad rss-counter state mm:00000000a169e535 type:MM_FILEPAGES val:33 [ 42.003896] BUG: Bad rss-counter state mm:00000000a169e535 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:47029' (ECDSA) to the list of known hosts. 2023/06/20 03:35:28 fuzzer started 2023/06/20 03:35:29 dialing manager at localhost:44161 2023/06/20 03:35:29 checking machine... 2023/06/20 03:35:29 checking revisions... [ 42.674380] kmemleak: Automatic memory scanning thread ended 2023/06/20 03:35:29 testing simple program... [ 42.735076] cgroup: Unknown subsys name 'net' [ 42.776053] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 03:35:27 Registers: info registers vcpu 0 RAX=0000000000000000 RBX=0000000000000002 RCX=ffffffff82178192 RDX=ffff8880183351c0 RSI=0000000000000003 RDI=0000000000000005 RBP=ffffffff849efda0 RSP=ffff88800fc57a18 R8 =0000000000000005 R9 =0000000000000002 R10=0000000000000003 R11=0000000000000000 R12=0000000000000003 R13=0000000000000005 R14=0000000000000003 R15=0000000097251982 RIP=ffffffff814c0420 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 00007fbc5a4d8900 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=00007ffdc6e75000 CR3=000000000ed80000 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=635f6e6f69737365733a4d41503d706f XMM01=6f6c5f6d61702c78756e696c65735f6d XMM02=61702c74696d7265705f6d61702c7469 XMM03=655f6d61702c7374696d696c5f6d6170 XMM04=3d6c616e696d72657420322e322e302e XMM05=3d656d616e74736f682022646873732f XMM06=746f6f72223d746363612078756e696c XMM07=6e655f6d61702c7374696d696c5f6d61 XMM08=652075253d64692073253d706f000000 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=ffff88806cf35000 RBX=0000000000000001 RCX=ffffffff8450c50e RDX=ffffed100d9e6a01 RSI=0000000000000004 RDI=ffffffff812889a5 RBP=dffffc0000000000 RSP=ffff888008e27e70 R8 =0000000000000000 R9 =ffffed100d9e6a00 R10=ffff88806cf35003 R11=0000000000000001 R12=ffffffff85d3bed0 R13=1ffff110011c4fd3 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 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=00007f0c94a15b80 CR3=000000000eb8c000 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=400add688f505eb356409be685b5d9a7 XMM02=0000000000120728eff9b2d0a8fce9cb XMM03=00000000001207f82c67c8bc2e329bc3 XMM04=ee7c5324d6762b7700000000000ae988 XMM05=dfcdbad4f1609c370000000000134f70 XMM06=0e3a2a82cee574dd0000000000134148 XMM07=e042d86d42eb936e0000000000124638 XMM08=cfc4c14cd9fcdd3600000000001207f8 XMM09=00000000000000000000000000000000 XMM10=20200000000020202020202020200000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000