syzkaller login: [ 38.714532] BUG: Bad rss-counter state mm:000000007b2ad330 type:MM_FILEPAGES val:33 [ 38.715548] BUG: Bad rss-counter state mm:000000007b2ad330 type:MM_ANONPAGES val:22 [ 38.881314] ================================================================== [ 38.882216] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 38.883177] Read of size 8 at addr ffff88800e0c83f8 by task sshd/219 [ 38.883950] [ 38.884166] CPU: 1 PID: 219 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 38.885035] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 38.885942] Call Trace: [ 38.886243] [ 38.886524] dump_stack_lvl+0x91/0xf0 [ 38.886988] print_report+0xcc/0x620 [ 38.887451] ? __virt_addr_valid+0x102/0x340 [ 38.887977] ? vma_interval_tree_remove+0xc75/0xec0 [ 38.888557] ? vma_interval_tree_remove+0xc75/0xec0 [ 38.889137] kasan_report+0xbe/0xf0 [ 38.889594] ? vma_interval_tree_remove+0xc75/0xec0 [ 38.890177] vma_interval_tree_remove+0xc75/0xec0 [ 38.890768] vma_prepare+0xc54/0x11a0 [ 38.891231] __split_vma+0x5af/0x950 [ 38.891711] ? __pfx___split_vma+0x10/0x10 [ 38.892245] ? find_held_lock+0x2c/0x110 [ 38.892760] do_vmi_align_munmap+0x2ba/0x11f0 [ 38.893319] ? lock_is_held_type+0x9f/0x120 [ 38.893861] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 38.894485] ? mtree_range_walk+0x632/0x900 [ 38.895032] ? mas_walk+0x5c7/0x7c0 [ 38.895502] do_vmi_munmap+0x1f1/0x2b0 [ 38.895983] mmap_region+0x1f9/0x2660 [ 38.896462] ? vm_mmap_pgoff+0x15c/0x3a0 [ 38.896967] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 38.897674] ? __pfx_lock_acquire+0x10/0x10 [ 38.898212] ? __pfx_mmap_region+0x10/0x10 [ 38.898759] ? security_mmap_addr+0x7d/0xa0 [ 38.899300] ? get_unmapped_area+0x1f5/0x3f0 [ 38.899846] do_mmap+0x854/0xf00 [ 38.900280] vm_mmap_pgoff+0x1a6/0x3a0 [ 38.900767] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 38.901334] ksys_mmap_pgoff+0x3af/0x500 [ 38.901838] do_syscall_64+0x3f/0x90 [ 38.902332] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 38.902992] RIP: 0033:0x7f9c913ffd82 [ 38.903453] 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 [ 38.905579] RSP: 002b:00007ffd135f8298 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 38.906490] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f9c913ffd82 [ 38.907341] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f9c90839000 [ 38.908194] RBP: 00007f9c90839000 R08: 0000000000000009 R09: 0000000000001000 [ 38.909044] R10: 0000000000000812 R11: 0000000000000206 R12: 00005602c2f32980 [ 38.909890] R13: 00007ffd135f82b0 R14: 00007ffd135f82e0 R15: 00007ffd135f8640 [ 38.910748] [ 38.911044] [ 38.911256] Allocated by task 212: [ 38.911678] kasan_save_stack+0x22/0x50 [ 38.912186] kasan_set_track+0x25/0x30 [ 38.912665] __kasan_slab_alloc+0x59/0x70 [ 38.913181] kmem_cache_alloc+0x16b/0x370 [ 38.913694] vm_area_dup+0x20/0x160 [ 38.914146] __split_vma+0x170/0x950 [ 38.914619] split_vma+0xc6/0x110 [ 38.915059] mprotect_fixup+0x8d2/0xb30 [ 38.915572] do_mprotect_pkey+0x87e/0xd40 [ 38.916097] __x64_sys_mprotect+0x78/0xc0 [ 38.916610] do_syscall_64+0x3f/0x90 [ 38.917080] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 38.917721] [ 38.917938] Freed by task 212: [ 38.918348] kasan_save_stack+0x22/0x50 [ 38.918841] kasan_set_track+0x25/0x30 [ 38.919330] kasan_save_free_info+0x2b/0x50 [ 38.919859] __kasan_slab_free+0x10a/0x190 [ 38.920418] kmem_cache_free+0x10d/0x4d0 [ 38.920981] rcu_core+0x8c8/0x2860 [ 38.921468] __do_softirq+0x1b7/0x7d4 [ 38.921989] [ 38.922224] Last potentially related work creation: [ 38.922870] kasan_save_stack+0x22/0x50 [ 38.923422] __kasan_record_aux_stack+0x8e/0xa0 [ 38.924052] __call_rcu_common.constprop.0+0x6a/0xb90 [ 38.924756] remove_vma+0x139/0x170 [ 38.925236] do_vmi_align_munmap+0xd4a/0x11f0 [ 38.925846] do_vmi_munmap+0x1f1/0x2b0 [ 38.926387] __vm_munmap+0x138/0x3a0 [ 38.926896] __x64_sys_munmap+0x59/0x80 [ 38.927440] do_syscall_64+0x3f/0x90 [ 38.927951] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 38.928669] [ 38.928909] Second to last potentially related work creation: [ 38.929651] kasan_save_stack+0x22/0x50 [ 38.930192] __kasan_record_aux_stack+0x8e/0xa0 [ 38.930834] __call_rcu_common.constprop.0+0x6a/0xb90 [ 38.931519] remove_vma+0x139/0x170 [ 38.932012] do_vmi_align_munmap+0xd4a/0x11f0 [ 38.932586] do_vmi_munmap+0x1f1/0x2b0 [ 38.933090] mmap_region+0x1f9/0x2660 [ 38.933573] do_mmap+0x854/0xf00 [ 38.934009] vm_mmap_pgoff+0x1a6/0x3a0 [ 38.934514] ksys_mmap_pgoff+0x3af/0x500 [ 38.935012] do_syscall_64+0x3f/0x90 [ 38.935484] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 38.936121] [ 38.936341] The buggy address belongs to the object at ffff88800e0c83a0 [ 38.936341] which belongs to the cache vm_area_struct of size 168 [ 38.937795] The buggy address is located 88 bytes inside of [ 38.937795] freed 168-byte region [ffff88800e0c83a0, ffff88800e0c8448) [ 38.939183] [ 38.939418] The buggy address belongs to the physical page: [ 38.940151] page:000000004191e2c5 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xe0c8 [ 38.941343] memcg:ffff88800e283d01 [ 38.941797] anon flags: 0x100000000000200(slab|node=0|zone=1) [ 38.942568] page_type: 0xffffffff() [ 38.943056] raw: 0100000000000200 ffff8880087a0c80 ffffea00003db940 dead000000000003 [ 38.944057] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800e283d01 [ 38.945032] page dumped because: kasan: bad access detected [ 38.945759] [ 38.945994] Memory state around the buggy address: [ 38.946656] ffff88800e0c8280: fc fc fc fc fc fc fc 00 00 00 00 00 00 00 00 00 [ 38.947596] ffff88800e0c8300: 00 00 00 00 00 00 00 00 00 00 00 00 fc fc fc fc [ 38.948533] >ffff88800e0c8380: fc fc fc fc fa fb fb fb fb fb fb fb fb fb fb fb [ 38.949449] ^ [ 38.950377] ffff88800e0c8400: fb fb fb fb fb fb fb fb fb fc fc fc fc fc fc fc [ 38.951300] ffff88800e0c8480: fc 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 38.952206] ================================================================== [ 38.953410] Disabling lock debugging due to kernel taint [ 40.935976] BUG: Bad rss-counter state mm:00000000ad704479 type:MM_FILEPAGES val:33 [ 40.937147] BUG: Bad rss-counter state mm:00000000ad704479 type:MM_ANONPAGES val:22 [ 41.314851] BUG: Bad rss-counter state mm:00000000b9eb81e2 type:MM_FILEPAGES val:33 [ 41.315852] BUG: Bad rss-counter state mm:00000000b9eb81e2 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:54085' (ECDSA) to the list of known hosts. 2023/06/20 11:24:21 fuzzer started 2023/06/20 11:24:21 dialing manager at localhost:36067 2023/06/20 11:24:21 checking machine... 2023/06/20 11:24:21 checking revisions... [ 42.039883] kmemleak: Automatic memory scanning thread ended 2023/06/20 11:24:21 testing simple program... [ 42.098626] cgroup: Unknown subsys name 'net' [ 42.213548] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 11:24:20 Registers: info registers vcpu 0 RAX=0000000000000001 RBX=ffff88806ce3a540 RCX=ffffffff81410560 RDX=ffffed100d9c74a9 RSI=0000000000000008 RDI=ffff888015b51b78 RBP=0000000000000001 RSP=ffff88806ce09f98 R8 =0000000000000001 R9 =ffffed100d9c74a8 R10=ffff88806ce3a547 R11=ffff88806ce09ff8 R12=0000000000000000 R13=0000000000000000 R14=0000000000000000 R15=0000000000000000 RIP=ffffffff81410565 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 00007fee6201c900 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=00007fee625d40b0 CR3=0000000016f1c000 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=25252525252525252525252525252525 XMM01=000000000000000000000000000000ff XMM02=000000000000000000000000000000ff XMM03=5320444f4854454d5f54505952434e45 XMM04=40404040404040404040404040404040 XMM05=5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a XMM06=20202020202020202020202020202020 XMM07=00000000000000000000000000000000 XMM08=662079726f6d656d20666f2074756f00 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=00007fce09054450 CR3=000000000c6c4000 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=0cd40ec20b9e61b6844940e484a44363 XMM02=2c67c8bc2e329bc3000000000011a800 XMM03=fb795ef6d657705600000000001211a0 XMM04=4638db6fbe2cdf4400000000000ae988 XMM05=dfcdbad4f1609c3700000000001320b8 XMM06=b41a217f7386eca00000000000131290 XMM07=e042d86d42eb936e0000000000121420 XMM08=cb8b0c7fcf1e5eb5000000000011a860 XMM09=00000000000000000000000000000000 XMM10=20200000000020202020202020200000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000