syzkaller login: [ 32.119104] BUG: Bad rss-counter state mm:00000000a9e6c596 type:MM_FILEPAGES val:33 [ 32.120970] BUG: Bad rss-counter state mm:00000000a9e6c596 type:MM_ANONPAGES val:22 [ 32.281533] ================================================================== [ 32.282454] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 32.283389] Read of size 8 at addr ffff8880096b6d08 by task sshd/221 [ 32.284160] [ 32.284376] CPU: 1 PID: 221 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 32.285373] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 32.286352] Call Trace: [ 32.286668] [ 32.286970] dump_stack_lvl+0x91/0xf0 [ 32.287456] print_report+0xcc/0x620 [ 32.287933] ? __virt_addr_valid+0x102/0x340 [ 32.288484] ? vma_interval_tree_remove+0xc75/0xec0 [ 32.289106] ? vma_interval_tree_remove+0xc75/0xec0 [ 32.289717] kasan_report+0xbe/0xf0 [ 32.290195] ? vma_interval_tree_remove+0xc75/0xec0 [ 32.290810] vma_interval_tree_remove+0xc75/0xec0 [ 32.291410] vma_prepare+0xc54/0x11a0 [ 32.291884] __split_vma+0x5af/0x950 [ 32.292355] ? __pfx___split_vma+0x10/0x10 [ 32.292879] ? find_held_lock+0x2c/0x110 [ 32.293397] do_vmi_align_munmap+0x2ba/0x11f0 [ 32.293969] ? lock_is_held_type+0x9f/0x120 [ 32.294503] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 32.295105] ? mtree_range_walk+0x632/0x900 [ 32.295653] ? mas_walk+0x5c7/0x7c0 [ 32.296125] do_vmi_munmap+0x1f1/0x2b0 [ 32.296612] mmap_region+0x1f9/0x2660 [ 32.297096] ? vm_mmap_pgoff+0x15c/0x3a0 [ 32.297605] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 32.298333] ? __pfx_lock_acquire+0x10/0x10 [ 32.298860] ? __pfx_mmap_region+0x10/0x10 [ 32.299392] ? security_mmap_addr+0x7d/0xa0 [ 32.299920] ? get_unmapped_area+0x1f5/0x3f0 [ 32.300469] do_mmap+0x854/0xf00 [ 32.300906] vm_mmap_pgoff+0x1a6/0x3a0 [ 32.301401] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 32.301964] ksys_mmap_pgoff+0x3af/0x500 [ 32.302469] do_syscall_64+0x3f/0x90 [ 32.302947] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 32.303590] RIP: 0033:0x7faaf7949d82 [ 32.304047] 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 [ 32.306185] RSP: 002b:00007ffcdc2a5a08 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 32.307089] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007faaf7949d82 [ 32.307930] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007faaf6d83000 [ 32.308777] RBP: 00007faaf6d83000 R08: 0000000000000009 R09: 0000000000001000 [ 32.309618] R10: 0000000000000812 R11: 0000000000000206 R12: 00005573e6b6eec0 [ 32.310488] R13: 00007ffcdc2a5a20 R14: 00007ffcdc2a5a50 R15: 00007ffcdc2a5db0 [ 32.311349] [ 32.311643] [ 32.311857] Allocated by task 214: [ 32.312286] kasan_save_stack+0x22/0x50 [ 32.312800] kasan_set_track+0x25/0x30 [ 32.313313] __kasan_slab_alloc+0x59/0x70 [ 32.313835] kmem_cache_alloc+0x16b/0x370 [ 32.314363] vm_area_dup+0x20/0x160 [ 32.314813] __split_vma+0x170/0x950 [ 32.315280] split_vma+0xc6/0x110 [ 32.315725] mprotect_fixup+0x8d2/0xb30 [ 32.316228] do_mprotect_pkey+0x87e/0xd40 [ 32.316746] __x64_sys_mprotect+0x78/0xc0 [ 32.317270] do_syscall_64+0x3f/0x90 [ 32.317742] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 32.318383] [ 32.318601] Freed by task 214: [ 32.318990] kasan_save_stack+0x22/0x50 [ 32.319499] kasan_set_track+0x25/0x30 [ 32.319990] kasan_save_free_info+0x2b/0x50 [ 32.320519] __kasan_slab_free+0x10a/0x190 [ 32.321054] kmem_cache_free+0x10d/0x4d0 [ 32.321554] rcu_core+0x8c8/0x2860 [ 32.322008] __do_softirq+0x1b7/0x7d4 [ 32.322475] [ 32.322691] Last potentially related work creation: [ 32.323279] kasan_save_stack+0x22/0x50 [ 32.323803] __kasan_record_aux_stack+0x8e/0xa0 [ 32.324397] __call_rcu_common.constprop.0+0x6a/0xb90 [ 32.325044] remove_vma+0x139/0x170 [ 32.325495] do_vmi_align_munmap+0xd4a/0x11f0 [ 32.326071] do_vmi_munmap+0x1f1/0x2b0 [ 32.326561] __vm_munmap+0x138/0x3a0 [ 32.327027] __x64_sys_munmap+0x59/0x80 [ 32.327532] do_syscall_64+0x3f/0x90 [ 32.328028] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 32.328664] [ 32.328876] The buggy address belongs to the object at ffff8880096b6cb0 [ 32.328876] which belongs to the cache vm_area_struct of size 168 [ 32.330397] The buggy address is located 88 bytes inside of [ 32.330397] freed 168-byte region [ffff8880096b6cb0, ffff8880096b6d58) [ 32.331845] [ 32.332068] The buggy address belongs to the physical page: [ 32.332723] page:00000000d8d5b578 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x96b6 [ 32.333808] memcg:ffff88800e7d9a01 [ 32.334258] flags: 0x100000000000200(slab|node=0|zone=1) [ 32.334929] page_type: 0xffffffff() [ 32.335384] raw: 0100000000000200 ffff88800879fc80 dead000000000122 0000000000000000 [ 32.336323] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800e7d9a01 [ 32.337232] page dumped because: kasan: bad access detected [ 32.337904] [ 32.338134] Memory state around the buggy address: [ 32.338739] ffff8880096b6c00: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 fc fc [ 32.339614] ffff8880096b6c80: fc fc fc fc fc fc fa fb fb fb fb fb fb fb fb fb [ 32.340484] >ffff8880096b6d00: fb fb fb fb fb fb fb fb fb fb fb fc fc fc fc fc [ 32.341360] ^ [ 32.341822] ffff8880096b6d80: fc fc fc fa fb fb fb fb fb fb fb fb fb fb fb fb [ 32.342726] ffff8880096b6e00: fb fb fb fb fb fb fb fb fc fc fc fc fc fc fc fc [ 32.343613] ================================================================== [ 32.344736] Disabling lock debugging due to kernel taint [ 34.794298] BUG: Bad rss-counter state mm:00000000fd47f14c type:MM_FILEPAGES val:33 [ 34.795283] BUG: Bad rss-counter state mm:00000000fd47f14c type:MM_ANONPAGES val:22 [ 35.333091] BUG: Bad rss-counter state mm:0000000079965021 type:MM_FILEPAGES val:33 [ 35.334282] BUG: Bad rss-counter state mm:0000000079965021 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:62036' (ECDSA) to the list of known hosts. 2023/06/19 13:50:38 fuzzer started 2023/06/19 13:50:38 dialing manager at localhost:44161 2023/06/19 13:50:38 checking machine... 2023/06/19 13:50:38 checking revisions... [ 35.998288] kmemleak: Automatic memory scanning thread ended 2023/06/19 13:50:38 testing simple program... [ 36.053645] cgroup: Unknown subsys name 'net' [ 36.123715] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 13:50:37 Registers: info registers vcpu 0 RAX=ffff7fffffffffff RBX=0000000000000000 RCX=ffffffff812d869a RDX=0000000000000000 RSI=0000000000000008 RDI=ffffffff85d3bed0 RBP=1ffff11002b9efc2 RSP=ffff888015cf7de0 R8 =0000000000000000 R9 =0000000000000000 R10=ffffffff85d3bed7 R11=0000000000000000 R12=ffff888015dbcba0 R13=ffffffff8113b9e3 R14=0000000000000000 R15=ffff888015dbca00 RIP=ffffffff8180eef9 RFL=00000216 [----AP-] 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 =0000 0000000000000000 00000000 00000000 DS =0000 0000000000000000 00000000 00000000 FS =0000 00007f3efdcc5900 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=00007f3efe819044 CR3=000000000e772000 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=00000000000000000000000000000000 XMM02=00000000000000000000000000000000 XMM03=00000000000000000000000000000000 XMM04=00000000000000000000000000000000 XMM05=00000000000000000000000000000000 XMM06=313d6563636120322e322e202e30313d XMM07=672065736f6c635f6e6f69737365733a 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=00007ff9a1f21bc0 CR3=0000000006828000 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=2037333a30353a3331203931206e754a XMM01=73732878696e755f6d6170203a5d3133 XMM02=65736f6c63206e6f6973736573203a29 XMM03=755f6d6170203a5d3133325b64687373 XMM04=69662068637573206f4e203a656c6163 XMM05=3a656c696620766e65206e65706f206f XMM06=65733a6468737328766e655f6d617020 XMM07=6b7a79732037333a30353a3331203931 XMM08=3d656e696c646d632022656369767265 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000