syzkaller login: [ 38.758801] BUG: Bad rss-counter state mm:00000000e6f68a2a type:MM_FILEPAGES val:33 [ 38.760262] BUG: Bad rss-counter state mm:00000000e6f68a2a type:MM_ANONPAGES val:22 [ 38.904836] ================================================================== [ 38.905801] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 38.906812] Read of size 8 at addr ffff88800e7a8c20 by task sshd/219 [ 38.907639] [ 38.907938] CPU: 0 PID: 219 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 38.908851] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 38.909879] Call Trace: [ 38.910245] [ 38.910557] dump_stack_lvl+0x91/0xf0 [ 38.911091] print_report+0xcc/0x620 [ 38.911610] ? __virt_addr_valid+0x102/0x340 [ 38.912202] ? vma_interval_tree_remove+0xc75/0xec0 [ 38.912862] ? vma_interval_tree_remove+0xc75/0xec0 [ 38.913525] kasan_report+0xbe/0xf0 [ 38.914039] ? vma_interval_tree_remove+0xc75/0xec0 [ 38.914733] vma_interval_tree_remove+0xc75/0xec0 [ 38.915391] vma_prepare+0xc54/0x11a0 [ 38.915915] __split_vma+0x5af/0x950 [ 38.916443] ? __pfx___split_vma+0x10/0x10 [ 38.917030] ? find_held_lock+0x2c/0x110 [ 38.917605] do_vmi_align_munmap+0x2ba/0x11f0 [ 38.918227] ? lock_is_held_type+0x9f/0x120 [ 38.918843] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 38.919513] ? mtree_range_walk+0x632/0x900 [ 38.920128] ? mas_walk+0x5c7/0x7c0 [ 38.920652] do_vmi_munmap+0x1f1/0x2b0 [ 38.921192] mmap_region+0x1f9/0x2660 [ 38.921728] ? vm_mmap_pgoff+0x15c/0x3a0 [ 38.922297] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 38.923095] ? __pfx_lock_acquire+0x10/0x10 [ 38.923684] ? __pfx_mmap_region+0x10/0x10 [ 38.924267] ? security_mmap_addr+0x7d/0xa0 [ 38.924853] ? get_unmapped_area+0x1f5/0x3f0 [ 38.925459] do_mmap+0x854/0xf00 [ 38.925946] vm_mmap_pgoff+0x1a6/0x3a0 [ 38.926491] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 38.927131] ksys_mmap_pgoff+0x3af/0x500 [ 38.927692] do_syscall_64+0x3f/0x90 [ 38.928217] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 38.928929] RIP: 0033:0x7f0dec57fd82 [ 38.929429] 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 [ 38.931800] RSP: 002b:00007ffc9f994898 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 38.932798] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f0dec57fd82 [ 38.933731] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f0deb9b9000 [ 38.934701] RBP: 00007f0deb9b9000 R08: 0000000000000009 R09: 0000000000001000 [ 38.935630] R10: 0000000000000812 R11: 0000000000000206 R12: 000055e034163f70 [ 38.936564] R13: 00007ffc9f9948b0 R14: 00007ffc9f9948e0 R15: 00007ffc9f994c40 [ 38.937514] [ 38.937843] [ 38.938080] Allocated by task 212: [ 38.938564] kasan_save_stack+0x22/0x50 [ 38.939127] kasan_set_track+0x25/0x30 [ 38.939671] __kasan_slab_alloc+0x59/0x70 [ 38.940251] kmem_cache_alloc+0x16b/0x370 [ 38.940824] vm_area_dup+0x20/0x160 [ 38.941328] __split_vma+0x170/0x950 [ 38.941846] split_vma+0xc6/0x110 [ 38.942334] mprotect_fixup+0x8d2/0xb30 [ 38.942898] do_mprotect_pkey+0x87e/0xd40 [ 38.943472] __x64_sys_mprotect+0x78/0xc0 [ 38.944047] do_syscall_64+0x3f/0x90 [ 38.944573] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 38.945283] [ 38.945520] Freed by task 203: [ 38.945956] kasan_save_stack+0x22/0x50 [ 38.946521] kasan_set_track+0x25/0x30 [ 38.947089] kasan_save_free_info+0x2b/0x50 [ 38.947674] __kasan_slab_free+0x10a/0x190 [ 38.948263] kmem_cache_free+0x10d/0x4d0 [ 38.948828] rcu_core+0x8c8/0x2860 [ 38.949320] __do_softirq+0x1b7/0x7d4 [ 38.949854] [ 38.950091] Last potentially related work creation: [ 38.950751] kasan_save_stack+0x22/0x50 [ 38.951307] __kasan_record_aux_stack+0x8e/0xa0 [ 38.951939] __call_rcu_common.constprop.0+0x6a/0xb90 [ 38.952648] remove_vma+0x139/0x170 [ 38.953148] do_vmi_align_munmap+0xd4a/0x11f0 [ 38.953769] do_vmi_munmap+0x1f1/0x2b0 [ 38.954311] __vm_munmap+0x138/0x3a0 [ 38.954838] __x64_sys_munmap+0x59/0x80 [ 38.955390] do_syscall_64+0x3f/0x90 [ 38.955915] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 38.956628] [ 38.956864] Second to last potentially related work creation: [ 38.957622] kasan_save_stack+0x22/0x50 [ 38.958178] __kasan_record_aux_stack+0x8e/0xa0 [ 38.958829] __call_rcu_common.constprop.0+0x6a/0xb90 [ 38.959541] remove_vma+0x139/0x170 [ 38.960045] do_vmi_align_munmap+0xd4a/0x11f0 [ 38.960662] do_vmi_munmap+0x1f1/0x2b0 [ 38.961201] mmap_region+0x1f9/0x2660 [ 38.961727] do_mmap+0x854/0xf00 [ 38.962201] vm_mmap_pgoff+0x1a6/0x3a0 [ 38.962758] ksys_mmap_pgoff+0x3af/0x500 [ 38.963313] do_syscall_64+0x3f/0x90 [ 38.963836] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 38.964554] [ 38.964792] The buggy address belongs to the object at ffff88800e7a8bc8 [ 38.964792] which belongs to the cache vm_area_struct of size 168 [ 38.966413] The buggy address is located 88 bytes inside of [ 38.966413] freed 168-byte region [ffff88800e7a8bc8, ffff88800e7a8c70) [ 38.967976] [ 38.968216] The buggy address belongs to the physical page: [ 38.968946] page:000000002745b2e2 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xe7a8 [ 38.970146] memcg:ffff88800ea75701 [ 38.970628] anon flags: 0x100000000000200(slab|node=0|zone=1) [ 38.971400] page_type: 0xffffffff() [ 38.971895] raw: 0100000000000200 ffff8880087a0c80 ffffea00003b2080 dead000000000007 [ 38.972916] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800ea75701 [ 38.973919] page dumped because: kasan: bad access detected [ 38.974667] [ 38.974906] Memory state around the buggy address: [ 38.975546] ffff88800e7a8b00: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 38.976503] ffff88800e7a8b80: 00 fc fc fc fc fc fc fc fc fa fb fb fb fb fb fb [ 38.977447] >ffff88800e7a8c00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fc fc [ 38.978392] ^ [ 38.978982] ffff88800e7a8c80: fc fc fc fc fc fc fa fb fb fb fb fb fb fb fb fb [ 38.979924] ffff88800e7a8d00: fb fb fb fb fb fb fb fb fb fb fb fc fc fc fc fc [ 38.980859] ================================================================== [ 38.981922] Disabling lock debugging due to kernel taint [ 40.825848] BUG: Bad rss-counter state mm:0000000005231d17 type:MM_FILEPAGES val:33 [ 40.826860] BUG: Bad rss-counter state mm:0000000005231d17 type:MM_ANONPAGES val:22 [ 41.269535] BUG: Bad rss-counter state mm:000000001e3538a4 type:MM_FILEPAGES val:33 [ 41.270754] BUG: Bad rss-counter state mm:000000001e3538a4 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:12389' (ECDSA) to the list of known hosts. 2023/06/20 16:46:53 fuzzer started 2023/06/20 16:46:54 dialing manager at localhost:36067 2023/06/20 16:46:54 checking machine... 2023/06/20 16:46:54 checking revisions... [ 41.927838] kmemleak: Automatic memory scanning thread ended 2023/06/20 16:46:54 testing simple program... [ 41.977930] cgroup: Unknown subsys name 'net' [ 42.034783] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 16:46:53 Registers: info registers vcpu 0 RAX=ffff88806ce35000 RBX=0000000000000000 RCX=ffffffff8451250e RDX=ffffed100d9c6a01 RSI=0000000000000004 RDI=ffffffff81288ac5 RBP=dffffc0000000000 RSP=ffffffff85407e10 R8 =0000000000000000 R9 =ffffed100d9c6a00 R10=ffff88806ce35003 R11=ffff888008c04000 R12=ffffffff85d3d350 R13=1ffffffff0a80fc7 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 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=00007eff4cda7140 CR3=000000000f40c000 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=1f570a14e8abafa56946bb3e8cbd6c67 XMM02=000000000011c988ec2efd57dc4c00df XMM03=0000000000122b90f9a93f0cfb5f74a9 XMM04=ed9f4715f14c539100000000000ae988 XMM05=dfcdbad4f1609c370000000000133a80 XMM06=27e6a87a4f27f4630000000000132c58 XMM07=e042d86d42eb936e0000000000122e68 XMM08=f9a93f0cfb5f74a9000000000011c9e8 XMM09=00000000000000000000000000000000 XMM10=20200000000020202020202020200000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=0000000000000000 RBX=0000000000000000 RCX=0000000000000000 RDX=ffff88800db63680 RSI=ffffffff838691ea RDI=0000000000000007 RBP=ffff88800f45fc48 RSP=ffff88800f45fb20 R8 =0000000000000007 R9 =fffffffffffff000 R10=0000000000000000 R11=0000000000000000 R12=0000000000000000 R13=00000000000000e4 R14=0000000000000000 R15=ffff888008ed6c00 RIP=ffffffff814c089b RFL=00000246 [---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 00007fe3e6ac4900 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=00007ffdb1f23000 CR3=000000001bd2e000 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=74696d7265705f6d61703d73726f746e XMM02=000000000000000000000000000000ff XMM03=5320444f4854454d5f54505952434e45 XMM04=40404040404040404040404040404040 XMM05=5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a XMM06=20202020202020202020202020202020 XMM07=00000000000000000000000000000000 XMM08=61662029286e65706f5f746964756100 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000