syzkaller login: [ 30.707226] BUG: Bad rss-counter state mm:00000000c2ffae9f type:MM_FILEPAGES val:33 [ 30.708408] BUG: Bad rss-counter state mm:00000000c2ffae9f type:MM_ANONPAGES val:22 [ 30.871787] ================================================================== [ 30.872912] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 30.874065] Read of size 8 at addr ffff888016e823f8 by task sshd/219 [ 30.875231] [ 30.875499] CPU: 1 PID: 219 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 30.876546] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 30.877790] Call Trace: [ 30.878180] [ 30.878517] dump_stack_lvl+0x91/0xf0 [ 30.879104] print_report+0xcc/0x620 [ 30.879696] ? __virt_addr_valid+0x102/0x340 [ 30.880384] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.881147] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.881919] kasan_report+0xbe/0xf0 [ 30.882497] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.883248] vma_interval_tree_remove+0xc75/0xec0 [ 30.883978] vma_prepare+0xc54/0x11a0 [ 30.884575] __split_vma+0x5af/0x950 [ 30.885151] ? __pfx___split_vma+0x10/0x10 [ 30.885836] ? find_held_lock+0x2c/0x110 [ 30.886470] do_vmi_align_munmap+0x2ba/0x11f0 [ 30.887163] ? lock_is_held_type+0x9f/0x120 [ 30.887784] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 30.888380] ? mtree_range_walk+0x632/0x900 [ 30.888955] ? mas_walk+0x5c7/0x7c0 [ 30.889462] do_vmi_munmap+0x1f1/0x2b0 [ 30.890007] mmap_region+0x1f9/0x2660 [ 30.890498] ? vm_mmap_pgoff+0x15c/0x3a0 [ 30.891026] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 30.891754] ? __pfx_lock_acquire+0x10/0x10 [ 30.892303] ? __pfx_mmap_region+0x10/0x10 [ 30.892843] ? security_mmap_addr+0x7d/0xa0 [ 30.893408] ? get_unmapped_area+0x1f5/0x3f0 [ 30.894016] do_mmap+0x854/0xf00 [ 30.894456] vm_mmap_pgoff+0x1a6/0x3a0 [ 30.894957] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 30.895539] ksys_mmap_pgoff+0x3af/0x500 [ 30.896078] do_syscall_64+0x3f/0x90 [ 30.896600] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.897300] RIP: 0033:0x7f23d336ed82 [ 30.897822] 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 [ 30.900013] RSP: 002b:00007ffc7faf9948 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 30.900925] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f23d336ed82 [ 30.901855] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f23d27a8000 [ 30.902787] RBP: 00007f23d27a8000 R08: 0000000000000009 R09: 0000000000001000 [ 30.903713] R10: 0000000000000812 R11: 0000000000000206 R12: 00005636cb3e1f70 [ 30.904637] R13: 00007ffc7faf9960 R14: 00007ffc7faf9990 R15: 00007ffc7faf9cf0 [ 30.905560] [ 30.905878] [ 30.906122] Allocated by task 212: [ 30.906594] kasan_save_stack+0x22/0x50 [ 30.907160] kasan_set_track+0x25/0x30 [ 30.907697] __kasan_slab_alloc+0x59/0x70 [ 30.908290] kmem_cache_alloc+0x16b/0x370 [ 30.908854] vm_area_dup+0x20/0x160 [ 30.909333] __split_vma+0x170/0x950 [ 30.909846] split_vma+0xc6/0x110 [ 30.910350] mprotect_fixup+0x8d2/0xb30 [ 30.910906] do_mprotect_pkey+0x87e/0xd40 [ 30.911477] __x64_sys_mprotect+0x78/0xc0 [ 30.912045] do_syscall_64+0x3f/0x90 [ 30.912576] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.913256] [ 30.913505] Freed by task 212: [ 30.913962] kasan_save_stack+0x22/0x50 [ 30.914526] kasan_set_track+0x25/0x30 [ 30.915076] kasan_save_free_info+0x2b/0x50 [ 30.915665] __kasan_slab_free+0x10a/0x190 [ 30.916348] kmem_cache_free+0x10d/0x4d0 [ 30.916934] rcu_core+0x8c8/0x2860 [ 30.917441] __do_softirq+0x1b7/0x7d4 [ 30.917962] [ 30.918175] Last potentially related work creation: [ 30.918758] kasan_save_stack+0x22/0x50 [ 30.919261] __kasan_record_aux_stack+0x8e/0xa0 [ 30.919831] __call_rcu_common.constprop.0+0x6a/0xb90 [ 30.920505] remove_vma+0x139/0x170 [ 30.920943] do_vmi_align_munmap+0xd4a/0x11f0 [ 30.921529] do_vmi_munmap+0x1f1/0x2b0 [ 30.922037] __vm_munmap+0x138/0x3a0 [ 30.922503] __x64_sys_munmap+0x59/0x80 [ 30.922998] do_syscall_64+0x3f/0x90 [ 30.923465] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.924142] [ 30.924360] The buggy address belongs to the object at ffff888016e823a0 [ 30.924360] which belongs to the cache vm_area_struct of size 168 [ 30.925872] The buggy address is located 88 bytes inside of [ 30.925872] freed 168-byte region [ffff888016e823a0, ffff888016e82448) [ 30.927290] [ 30.927523] The buggy address belongs to the physical page: [ 30.928180] page:000000007b9554fd refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x16e82 [ 30.929289] memcg:ffff888016567301 [ 30.929755] flags: 0x100000000000200(slab|node=0|zone=1) [ 30.930396] page_type: 0xffffffff() [ 30.930870] raw: 0100000000000200 ffff88800879fc80 dead000000000122 0000000000000000 [ 30.931801] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff888016567301 [ 30.932723] page dumped because: kasan: bad access detected [ 30.933389] [ 30.933624] Memory state around the buggy address: [ 30.934217] ffff888016e82280: fc fc fc fc fc fc fc 00 00 00 00 00 00 00 00 00 [ 30.935047] ffff888016e82300: 00 00 00 00 00 00 00 00 00 00 00 00 fc fc fc fc [ 30.935880] >ffff888016e82380: fc fc fc fc fa fb fb fb fb fb fb fb fb fb fb fb [ 30.936692] ^ [ 30.937510] ffff888016e82400: fb fb fb fb fb fb fb fb fb fc fc fc fc fc fc fc [ 30.938340] ffff888016e82480: fc fa fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 30.939164] ================================================================== [ 30.940077] Disabling lock debugging due to kernel taint [ 32.967284] BUG: Bad rss-counter state mm:0000000033aefd13 type:MM_FILEPAGES val:33 [ 32.968483] BUG: Bad rss-counter state mm:0000000033aefd13 type:MM_ANONPAGES val:22 [ 33.360171] BUG: Bad rss-counter state mm:000000002aab08c2 type:MM_FILEPAGES val:33 [ 33.361812] BUG: Bad rss-counter state mm:000000002aab08c2 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:62552' (ECDSA) to the list of known hosts. 2023/06/19 19:01:48 fuzzer started 2023/06/19 19:01:49 dialing manager at localhost:44161 2023/06/19 19:01:49 checking machine... 2023/06/19 19:01:49 checking revisions... [ 34.122558] kmemleak: Automatic memory scanning thread ended 2023/06/19 19:01:49 testing simple program... [ 34.167828] cgroup: Unknown subsys name 'net' [ 34.219980] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 19:01:48 Registers: info registers vcpu 0 RAX=dffffc0000000000 RBX=ffffed100d9c73fc RCX=ffffffff8124c019 RDX=0000000000000000 RSI=0000000000000000 RDI=ffff88806ce39518 RBP=ffff88800ffa0000 RSP=ffff88806ce09eb0 R8 =0000000000000000 R9 =fffffbfff0ba77da R10=ffffffff85d3bed7 R11=0000000000000001 R12=ffff88806ce09f20 R13=ffffffffffffffc8 R14=dffffc0000000000 R15=ffff88806ce39500 RIP=ffffffff812c2104 RFL=00000046 [---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 00007f7a830a8900 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=00007f7a8365f618 CR3=000000000eac0000 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=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=00007f8776cff0d0 CR3=000000000ea86000 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=1c8c751fcdc1cfb6994c0ad9d15f6830 XMM02=ec2efd57dc4c00df000000000011d010 XMM03=b700f2d4bcc013dc000000000011d0e0 XMM04=5c4e82a72ab7a23900000000000ae988 XMM05=dfcdbad4f1609c370000000000134100 XMM06=806171799158d9670000000000133f88 XMM07=e042d86d42eb936e0000000000124768 XMM08=b700f2d4bcc013dc000000000011d0e0 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000