syzkaller login: [ 39.002189] BUG: Bad rss-counter state mm:00000000135e2289 type:MM_FILEPAGES val:33 [ 39.003338] BUG: Bad rss-counter state mm:00000000135e2289 type:MM_ANONPAGES val:22 [ 39.097947] ================================================================== [ 39.098614] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 39.099329] Read of size 8 at addr ffff888016480ed8 by task sshd/224 [ 39.099881] [ 39.100035] CPU: 0 PID: 224 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 39.100655] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 39.101362] Call Trace: [ 39.101598] [ 39.101813] dump_stack_lvl+0x91/0xf0 [ 39.102268] print_report+0xcc/0x620 [ 39.102622] ? __virt_addr_valid+0x102/0x340 [ 39.103024] ? vma_interval_tree_remove+0xc75/0xec0 [ 39.103481] ? vma_interval_tree_remove+0xc75/0xec0 [ 39.103929] kasan_report+0xbe/0xf0 [ 39.104269] ? vma_interval_tree_remove+0xc75/0xec0 [ 39.104730] vma_interval_tree_remove+0xc75/0xec0 [ 39.105169] vma_prepare+0xc54/0x11a0 [ 39.105524] __split_vma+0x5af/0x950 [ 39.105872] ? __pfx___split_vma+0x10/0x10 [ 39.106262] ? find_held_lock+0x2c/0x110 [ 39.106640] do_vmi_align_munmap+0x2ba/0x11f0 [ 39.107049] ? lock_is_held_type+0x9f/0x120 [ 39.107458] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 39.107906] ? mtree_range_walk+0x632/0x900 [ 39.108300] ? mas_walk+0x5c7/0x7c0 [ 39.108641] do_vmi_munmap+0x1f1/0x2b0 [ 39.109000] mmap_region+0x1f9/0x2660 [ 39.109359] ? vm_mmap_pgoff+0x15c/0x3a0 [ 39.109737] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 39.110258] ? __pfx_lock_acquire+0x10/0x10 [ 39.110653] ? __pfx_mmap_region+0x10/0x10 [ 39.111053] ? security_mmap_addr+0x7d/0xa0 [ 39.111457] ? get_unmapped_area+0x1f5/0x3f0 [ 39.111868] do_mmap+0x854/0xf00 [ 39.112196] vm_mmap_pgoff+0x1a6/0x3a0 [ 39.112557] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 39.112971] ksys_mmap_pgoff+0x3af/0x500 [ 39.113350] do_syscall_64+0x3f/0x90 [ 39.113672] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 39.114111] RIP: 0033:0x7fbab6e7bd82 [ 39.114377] 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 [ 39.115631] RSP: 002b:00007ffc53d86858 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 39.116169] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007fbab6e7bd82 [ 39.116673] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007fbab62b5000 [ 39.117172] RBP: 00007fbab62b5000 R08: 0000000000000009 R09: 0000000000001000 [ 39.117672] R10: 0000000000000812 R11: 0000000000000206 R12: 000056194e493ec0 [ 39.118202] R13: 00007ffc53d86870 R14: 00007ffc53d868a0 R15: 00007ffc53d86c00 [ 39.118714] [ 39.118890] [ 39.119015] Allocated by task 217: [ 39.119289] kasan_save_stack+0x22/0x50 [ 39.119580] kasan_set_track+0x25/0x30 [ 39.119867] __kasan_slab_alloc+0x59/0x70 [ 39.120169] kmem_cache_alloc+0x16b/0x370 [ 39.120468] vm_area_dup+0x20/0x160 [ 39.120754] __split_vma+0x170/0x950 [ 39.121025] split_vma+0xc6/0x110 [ 39.121283] mprotect_fixup+0x8d2/0xb30 [ 39.121570] do_mprotect_pkey+0x87e/0xd40 [ 39.121879] __x64_sys_mprotect+0x78/0xc0 [ 39.122180] do_syscall_64+0x3f/0x90 [ 39.122460] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 39.122867] [ 39.122997] Freed by task 13: [ 39.123239] kasan_save_stack+0x22/0x50 [ 39.123535] kasan_set_track+0x25/0x30 [ 39.123829] kasan_save_free_info+0x2b/0x50 [ 39.124158] __kasan_slab_free+0x10a/0x190 [ 39.124466] kmem_cache_free+0x10d/0x4d0 [ 39.124771] rcu_core+0x8c8/0x2860 [ 39.125027] __do_softirq+0x1b7/0x7d4 [ 39.125302] [ 39.125426] Last potentially related work creation: [ 39.125793] kasan_save_stack+0x22/0x50 [ 39.126093] __kasan_record_aux_stack+0x8e/0xa0 [ 39.126438] __call_rcu_common.constprop.0+0x6a/0xb90 [ 39.126826] remove_vma+0x139/0x170 [ 39.127091] do_vmi_align_munmap+0xd4a/0x11f0 [ 39.127426] do_vmi_munmap+0x1f1/0x2b0 [ 39.127733] __vm_munmap+0x138/0x3a0 [ 39.128012] __x64_sys_munmap+0x59/0x80 [ 39.128297] do_syscall_64+0x3f/0x90 [ 39.128581] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 39.128952] [ 39.129086] The buggy address belongs to the object at ffff888016480e80 [ 39.129086] which belongs to the cache vm_area_struct of size 168 [ 39.129963] The buggy address is located 88 bytes inside of [ 39.129963] freed 168-byte region [ffff888016480e80, ffff888016480f28) [ 39.130785] [ 39.130912] The buggy address belongs to the physical page: [ 39.131316] page:00000000bd7d6418 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x16480 [ 39.131993] memcg:ffff888016a38f01 [ 39.132241] flags: 0x100000000000200(slab|node=0|zone=1) [ 39.132619] page_type: 0xffffffff() [ 39.132873] raw: 0100000000000200 ffff88800879fc80 dead000000000122 0000000000000000 [ 39.133376] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff888016a38f01 [ 39.133893] page dumped because: kasan: bad access detected [ 39.134262] [ 39.134393] Memory state around the buggy address: [ 39.134717] ffff888016480d80: fc fc fc 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 39.135233] ffff888016480e00: 00 00 00 00 00 00 00 00 fc fc fc fc fc fc fc fc [ 39.135725] >ffff888016480e80: fa fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 39.136196] ^ [ 39.136618] ffff888016480f00: fb fb fb fb fb fc fc fc fc fc fc fc fc fc fc fc [ 39.137096] ffff888016480f80: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc [ 39.137567] ================================================================== [ 39.138111] Disabling lock debugging due to kernel taint [ 40.447657] BUG: Bad rss-counter state mm:000000005f25b0f5 type:MM_FILEPAGES val:33 [ 40.448340] BUG: Bad rss-counter state mm:000000005f25b0f5 type:MM_ANONPAGES val:22 [ 40.849375] BUG: Bad rss-counter state mm:000000006057e11e type:MM_FILEPAGES val:33 [ 40.850067] BUG: Bad rss-counter state mm:000000006057e11e type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:14497' (ECDSA) to the list of known hosts. 2023/06/19 19:37:42 fuzzer started 2023/06/19 19:37:42 dialing manager at localhost:44161 2023/06/19 19:37:42 checking machine... 2023/06/19 19:37:42 checking revisions... [ 41.484110] kmemleak: Automatic memory scanning thread ended 2023/06/19 19:37:42 testing simple program... [ 41.530827] cgroup: Unknown subsys name 'net' [ 41.590280] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 19:37:41 Registers: info registers vcpu 0 RAX=ffffffff8661f20f RBX=ffffffff813ad420 RCX=ffffffff812d869a RDX=1ffff1100d9c135e RSI=ffffffff8661f20f RDI=ffff88806ce09b60 RBP=ffff88806ce09b30 RSP=ffff88806ce09a90 R8 =0000000000000000 R9 =fffffbfff0ba77da R10=ffffffff85d3bed7 R11=00000000000b5420 R12=ffff88806ce09b60 R13=0000000000000000 R14=ffffffff8542a6c0 R15=ffff88800ec7d410 RIP=ffffffff84532440 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 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=00007ffe9b96e3e8 CR3=000000000e144000 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=2032343a37333a3931203931206e754a XMM01=657463656e6e6f63736944203a5d3333 XMM02=302e303120746f6f722072657375206d XMM03=203a5d3333325b646873732072656c6c XMM04=69662068637573206f4e203a656c6163 XMM05=3a656c696620766e65206e65706f206f XMM06=65733a6468737328766e655f6d617020 XMM07=6b7a79732031343a37333a3931203931 XMM08=3d656e696c646d632022656369767265 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=ffffffff86136d81 RBX=0000000000000001 RCX=ffffffff86136d7c RDX=0000000000000002 RSI=0000000000000001 RDI=ffffffff85dfc4f4 RBP=ffff888015c1f9e0 RSP=ffff888015c1f918 R8 =ffffffff86136d7c R9 =ffff888015c1f9c8 R10=0000000000038001 R11=0000000000020c48 R12=ffff888015c1f9e8 R13=ffff888015c1f9d0 R14=ffff888015c1f9c9 R15=ffff888015c1f988 RIP=ffffffff81130a72 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 00007f328a5de900 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=00007f12874cb650 CR3=000000000ca5a000 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=ffffffffffffffffffffffffffffffff XMM01=30306234386136303638616663356134 XMM02=38303062343861363036386166633561 XMM03=2f6c616e72756f6a2f676f6c2f6e7572 XMM04=7b15cad2c319850a00000000000ae988 XMM05=4acd7df9b17a2f6d0000000000135750 XMM06=83594ee05b8d38950000000000134278 XMM07=00000000000000000000000000000000 XMM08=415453454d49545f454d49544c414552 XMM09=00000000000000000000000000000000 XMM10=20202000000020202020202000200000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000