syzkaller login: [ 44.206116] BUG: Bad rss-counter state mm:000000009a6db4f2 type:MM_FILEPAGES val:33 [ 44.207400] BUG: Bad rss-counter state mm:000000009a6db4f2 type:MM_ANONPAGES val:22 [ 44.356792] ================================================================== [ 44.357853] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 44.358965] Read of size 8 at addr ffff88800ee0a140 by task sshd/219 [ 44.359952] [ 44.360174] CPU: 0 PID: 219 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 44.361035] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 44.362140] Call Trace: [ 44.362493] [ 44.362779] dump_stack_lvl+0x91/0xf0 [ 44.363437] print_report+0xcc/0x620 [ 44.364100] ? __virt_addr_valid+0x102/0x340 [ 44.364777] ? vma_interval_tree_remove+0xc75/0xec0 [ 44.365414] ? vma_interval_tree_remove+0xc75/0xec0 [ 44.366035] kasan_report+0xbe/0xf0 [ 44.366540] ? vma_interval_tree_remove+0xc75/0xec0 [ 44.367157] vma_interval_tree_remove+0xc75/0xec0 [ 44.367806] vma_prepare+0xc54/0x11a0 [ 44.368309] __split_vma+0x5af/0x950 [ 44.368839] ? __pfx___split_vma+0x10/0x10 [ 44.369372] ? find_held_lock+0x2c/0x110 [ 44.369895] do_vmi_align_munmap+0x2ba/0x11f0 [ 44.370454] ? lock_is_held_type+0x9f/0x120 [ 44.370993] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 44.371601] ? mtree_range_walk+0x632/0x900 [ 44.372150] ? mas_walk+0x5c7/0x7c0 [ 44.372623] do_vmi_munmap+0x1f1/0x2b0 [ 44.373114] mmap_region+0x1f9/0x2660 [ 44.373595] ? vm_mmap_pgoff+0x15c/0x3a0 [ 44.374107] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 44.374814] ? __pfx_lock_acquire+0x10/0x10 [ 44.375344] ? __pfx_mmap_region+0x10/0x10 [ 44.375878] ? security_mmap_addr+0x7d/0xa0 [ 44.376407] ? get_unmapped_area+0x1f5/0x3f0 [ 44.376958] do_mmap+0x854/0xf00 [ 44.377398] vm_mmap_pgoff+0x1a6/0x3a0 [ 44.377895] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 44.378458] ksys_mmap_pgoff+0x3af/0x500 [ 44.378970] do_syscall_64+0x3f/0x90 [ 44.379458] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 44.380131] RIP: 0033:0x7faf022d3d82 [ 44.380596] 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 [ 44.382928] RSP: 002b:00007ffcd0265818 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 44.383878] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007faf022d3d82 [ 44.384748] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007faf0170d000 [ 44.385636] RBP: 00007faf0170d000 R08: 0000000000000009 R09: 0000000000001000 [ 44.386551] R10: 0000000000000812 R11: 0000000000000206 R12: 00005602e1c34ec0 [ 44.387416] R13: 00007ffcd0265830 R14: 00007ffcd0265860 R15: 00007ffcd0265bc0 [ 44.388407] [ 44.388697] [ 44.388911] Allocated by task 212: [ 44.389361] kasan_save_stack+0x22/0x50 [ 44.389870] kasan_set_track+0x25/0x30 [ 44.390398] __kasan_slab_alloc+0x59/0x70 [ 44.390933] kmem_cache_alloc+0x16b/0x370 [ 44.391481] vm_area_dup+0x20/0x160 [ 44.391959] __split_vma+0x170/0x950 [ 44.392427] split_vma+0xc6/0x110 [ 44.392864] mprotect_fixup+0x8d2/0xb30 [ 44.393372] do_mprotect_pkey+0x87e/0xd40 [ 44.393900] __x64_sys_mprotect+0x78/0xc0 [ 44.394412] do_syscall_64+0x3f/0x90 [ 44.394877] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 44.395522] [ 44.395748] Freed by task 212: [ 44.396159] kasan_save_stack+0x22/0x50 [ 44.396726] kasan_set_track+0x25/0x30 [ 44.397229] kasan_save_free_info+0x2b/0x50 [ 44.397766] __kasan_slab_free+0x10a/0x190 [ 44.398291] kmem_cache_free+0x10d/0x4d0 [ 44.398804] rcu_core+0x8c8/0x2860 [ 44.399250] __do_softirq+0x1b7/0x7d4 [ 44.399748] [ 44.399963] Last potentially related work creation: [ 44.400548] kasan_save_stack+0x22/0x50 [ 44.401062] __kasan_record_aux_stack+0x8e/0xa0 [ 44.401636] __call_rcu_common.constprop.0+0x6a/0xb90 [ 44.402281] remove_vma+0x139/0x170 [ 44.402734] do_vmi_align_munmap+0xd4a/0x11f0 [ 44.403294] do_vmi_munmap+0x1f1/0x2b0 [ 44.403793] __vm_munmap+0x138/0x3a0 [ 44.404269] __x64_sys_munmap+0x59/0x80 [ 44.404770] do_syscall_64+0x3f/0x90 [ 44.405244] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 44.405885] [ 44.406104] The buggy address belongs to the object at ffff88800ee0a0e8 [ 44.406104] which belongs to the cache vm_area_struct of size 168 [ 44.407581] The buggy address is located 88 bytes inside of [ 44.407581] freed 168-byte region [ffff88800ee0a0e8, ffff88800ee0a190) [ 44.408989] [ 44.409209] The buggy address belongs to the physical page: [ 44.409874] page:0000000036b9db4e refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xee0a [ 44.410958] memcg:ffff88800e130201 [ 44.411387] anon flags: 0x100000000000200(slab|node=0|zone=1) [ 44.412107] page_type: 0xffffffff() [ 44.412558] raw: 0100000000000200 ffff88800879fc80 ffffea00002531c0 dead000000000003 [ 44.413486] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800e130201 [ 44.414396] page dumped because: kasan: bad access detected [ 44.415057] [ 44.415276] Memory state around the buggy address: [ 44.415864] ffff88800ee0a000: fa fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 44.416719] ffff88800ee0a080: fb fb fb fb fb fc fc fc fc fc fc fc fc fa fb fb [ 44.417587] >ffff88800ee0a100: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 44.418440] ^ [ 44.419079] ffff88800ee0a180: fb fb fc fc fc fc fc fc fc fc 00 00 00 00 00 00 [ 44.419959] ffff88800ee0a200: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 fc [ 44.420817] ================================================================== [ 44.421824] Disabling lock debugging due to kernel taint [ 46.460534] BUG: Bad rss-counter state mm:000000005e2855b3 type:MM_FILEPAGES val:33 [ 46.461747] BUG: Bad rss-counter state mm:000000005e2855b3 type:MM_ANONPAGES val:22 [ 46.848102] BUG: Bad rss-counter state mm:0000000052e318a3 type:MM_FILEPAGES val:33 [ 46.849340] BUG: Bad rss-counter state mm:0000000052e318a3 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:44394' (ECDSA) to the list of known hosts. 2023/06/19 19:55:17 fuzzer started 2023/06/19 19:55:18 dialing manager at localhost:44161 2023/06/19 19:55:18 checking machine... 2023/06/19 19:55:18 checking revisions... [ 47.612185] kmemleak: Automatic memory scanning thread ended 2023/06/19 19:55:18 testing simple program... [ 47.663385] cgroup: Unknown subsys name 'net' [ 47.719417] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 19:55:12 Registers: info registers vcpu 0 RAX=ffffffff8609f9bf RBX=0000000000000001 RCX=ffffffff8609f9ba RDX=0000000000000000 RSI=0000000000000000 RDI=0000000000000001 RBP=ffff888008d7f9d0 RSP=ffff888008d7f908 R8 =ffffffff8609f9be R9 =ffff888008d7f9b8 R10=0000000000038001 R11=00000000000078fb R12=ffff888008d7f9d8 R13=ffff888008d7f9c0 R14=ffff888008d7fed0 R15=ffff888008d7f978 RIP=ffffffff8113113c 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 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=00007f70adadf650 CR3=000000000e9a8000 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=000000000000000000000000000000ff XMM02=000000000000000000000000000000ff XMM03=5320444f4854454d5f54505952434e45 XMM04=40404040404040404040404040404040 XMM05=5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a XMM06=20202020202020202020202020202020 XMM07=00000000000000000000000000000000 XMM08=ffbc64ffffbc44ffffbc34ffffbc9f00 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=dffffc0000000000 RBX=ffff88806cf09a98 RCX=ffffffff8609fb04 RDX=1ffff1100d9e1353 RSI=ffff88806cf09ff0 RDI=ffff88806cf09a98 RBP=ffff88806cf09ff0 RSP=ffff88806cf099f0 R8 =ffffffff8609fb08 R9 =ffff88806cf09ad8 R10=0000000000038001 R11=000000000000792d R12=0000000000000008 R13=ffff88806cf09ae0 R14=ffff88806cf09ff8 R15=ffff88806cf09a98 RIP=ffffffff81130416 RFL=00000286 [--S--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 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=00007f39a621c5c0 CR3=000000000c9d2000 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=ac130835df9ef1814a4e7f429acb7b8c XMM02=ec2efd57dc4c00df000000000011d960 XMM03=911d935dcd038949000000000011da30 XMM04=529b5c90fe49644300000000000ae988 XMM05=dfcdbad4f1609c370000000000133cd0 XMM06=806171799158d9670000000000133b58 XMM07=e042d86d42eb936e0000000000124668 XMM08=911d935dcd038949000000000011da30 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000