syzkaller login: [ 50.058480] BUG: Bad rss-counter state mm:00000000c4692128 type:MM_FILEPAGES val:33 [ 50.060150] BUG: Bad rss-counter state mm:00000000c4692128 type:MM_ANONPAGES val:22 [ 50.211895] ================================================================== [ 50.212964] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 50.214049] Read of size 8 at addr ffff888018e2b798 by task sshd/219 [ 50.214933] [ 50.215280] CPU: 1 PID: 219 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 50.216273] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 50.217393] Call Trace: [ 50.217709] [ 50.217984] dump_stack_lvl+0x91/0xf0 [ 50.218453] print_report+0xcc/0x620 [ 50.218916] ? __virt_addr_valid+0x102/0x340 [ 50.219447] ? vma_interval_tree_remove+0xc75/0xec0 [ 50.220040] ? vma_interval_tree_remove+0xc75/0xec0 [ 50.220649] kasan_report+0xbe/0xf0 [ 50.221106] ? vma_interval_tree_remove+0xc75/0xec0 [ 50.221711] vma_interval_tree_remove+0xc75/0xec0 [ 50.222294] vma_prepare+0xc54/0x11a0 [ 50.222760] __split_vma+0x5af/0x950 [ 50.223217] ? __pfx___split_vma+0x10/0x10 [ 50.223731] ? find_held_lock+0x2c/0x110 [ 50.224234] do_vmi_align_munmap+0x2ba/0x11f0 [ 50.224785] ? lock_is_held_type+0x9f/0x120 [ 50.225305] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 50.225892] ? mtree_range_walk+0x632/0x900 [ 50.226422] ? mas_walk+0x5c7/0x7c0 [ 50.226878] do_vmi_munmap+0x1f1/0x2b0 [ 50.227356] mmap_region+0x1f9/0x2660 [ 50.227823] ? vm_mmap_pgoff+0x15c/0x3a0 [ 50.228318] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 50.229022] ? __pfx_lock_acquire+0x10/0x10 [ 50.229540] ? __pfx_mmap_region+0x10/0x10 [ 50.230055] ? security_mmap_addr+0x7d/0xa0 [ 50.230569] ? get_unmapped_area+0x1f5/0x3f0 [ 50.231106] do_mmap+0x854/0xf00 [ 50.231532] vm_mmap_pgoff+0x1a6/0x3a0 [ 50.232009] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 50.232552] ksys_mmap_pgoff+0x3af/0x500 [ 50.233052] do_syscall_64+0x3f/0x90 [ 50.233512] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 50.234137] RIP: 0033:0x7f282ed8ad82 [ 50.234582] 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 [ 50.236636] RSP: 002b:00007ffdc186f198 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 50.237511] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f282ed8ad82 [ 50.238331] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f282e1c4000 [ 50.239143] RBP: 00007f282e1c4000 R08: 0000000000000009 R09: 0000000000001000 [ 50.239960] R10: 0000000000000812 R11: 0000000000000206 R12: 00005559f6a26ec0 [ 50.240785] R13: 00007ffdc186f1b0 R14: 00007ffdc186f1e0 R15: 00007ffdc186f540 [ 50.241608] [ 50.241889] [ 50.242097] Allocated by task 212: [ 50.242510] kasan_save_stack+0x22/0x50 [ 50.242996] kasan_set_track+0x25/0x30 [ 50.243469] __kasan_slab_alloc+0x59/0x70 [ 50.243979] kmem_cache_alloc+0x16b/0x370 [ 50.244480] vm_area_dup+0x20/0x160 [ 50.244928] __split_vma+0x170/0x950 [ 50.245386] split_vma+0xc6/0x110 [ 50.245922] mprotect_fixup+0x8d2/0xb30 [ 50.246420] do_mprotect_pkey+0x87e/0xd40 [ 50.246933] __x64_sys_mprotect+0x78/0xc0 [ 50.247449] do_syscall_64+0x3f/0x90 [ 50.247913] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 50.248550] [ 50.248782] Freed by task 212: [ 50.249167] kasan_save_stack+0x22/0x50 [ 50.249662] kasan_set_track+0x25/0x30 [ 50.250159] kasan_save_free_info+0x2b/0x50 [ 50.250687] __kasan_slab_free+0x10a/0x190 [ 50.251217] kmem_cache_free+0x10d/0x4d0 [ 50.251718] rcu_core+0x8c8/0x2860 [ 50.252156] __do_softirq+0x1b7/0x7d4 [ 50.252650] [ 50.252865] Last potentially related work creation: [ 50.253446] kasan_save_stack+0x22/0x50 [ 50.253944] __kasan_record_aux_stack+0x8e/0xa0 [ 50.254511] __call_rcu_common.constprop.0+0x6a/0xb90 [ 50.255146] remove_vma+0x139/0x170 [ 50.255596] do_vmi_align_munmap+0xd4a/0x11f0 [ 50.256212] do_vmi_munmap+0x1f1/0x2b0 [ 50.256709] __vm_munmap+0x138/0x3a0 [ 50.257173] __x64_sys_munmap+0x59/0x80 [ 50.257781] do_syscall_64+0x3f/0x90 [ 50.258240] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 50.258859] [ 50.259067] Second to last potentially related work creation: [ 50.259724] kasan_save_stack+0x22/0x50 [ 50.260213] __kasan_record_aux_stack+0x8e/0xa0 [ 50.260771] __call_rcu_common.constprop.0+0x6a/0xb90 [ 50.261390] remove_vma+0x139/0x170 [ 50.261826] do_vmi_align_munmap+0xd4a/0x11f0 [ 50.262361] do_vmi_munmap+0x1f1/0x2b0 [ 50.262828] __vm_munmap+0x138/0x3a0 [ 50.263277] __x64_sys_munmap+0x59/0x80 [ 50.263758] do_syscall_64+0x3f/0x90 [ 50.264218] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 50.264841] [ 50.265050] The buggy address belongs to the object at ffff888018e2b740 [ 50.265050] which belongs to the cache vm_area_struct of size 168 [ 50.266461] The buggy address is located 88 bytes inside of [ 50.266461] freed 168-byte region [ffff888018e2b740, ffff888018e2b7e8) [ 50.267809] [ 50.268018] The buggy address belongs to the physical page: [ 50.268668] page:00000000e91a95fa refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x18e2b [ 50.269715] memcg:ffff8880167c4601 [ 50.270126] flags: 0x100000000000200(slab|node=0|zone=1) [ 50.270745] page_type: 0xffffffff() [ 50.271191] raw: 0100000000000200 ffff88800879fc80 ffffea0000384600 dead000000000006 [ 50.272073] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff8880167c4601 [ 50.272950] page dumped because: kasan: bad access detected [ 50.273591] [ 50.273801] Memory state around the buggy address: [ 50.274357] ffff888018e2b680: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 50.275190] ffff888018e2b700: fc fc fc fc fc fc fc fc fa fb fb fb fb fb fb fb [ 50.276017] >ffff888018e2b780: fb fb fb fb fb fb fb fb fb fb fb fb fb fc fc fc [ 50.276855] ^ [ 50.277334] ffff888018e2b800: fc fc fc fc fc 00 00 00 00 00 00 00 00 00 00 00 [ 50.278171] ffff888018e2b880: 00 00 00 00 00 00 00 00 00 00 fc fc fc fc fc fc [ 50.278991] ================================================================== [ 50.279887] Disabling lock debugging due to kernel taint [ 52.198990] BUG: Bad rss-counter state mm:000000004d63268f type:MM_FILEPAGES val:33 [ 52.200451] BUG: Bad rss-counter state mm:000000004d63268f type:MM_ANONPAGES val:22 [ 52.755042] BUG: Bad rss-counter state mm:000000007aaa33e1 type:MM_FILEPAGES val:33 [ 52.756017] BUG: Bad rss-counter state mm:000000007aaa33e1 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:23156' (ECDSA) to the list of known hosts. 2023/06/19 16:05:40 fuzzer started 2023/06/19 16:05:40 dialing manager at localhost:44161 2023/06/19 16:05:40 checking machine... 2023/06/19 16:05:40 checking revisions... [ 53.356735] kmemleak: Automatic memory scanning thread ended 2023/06/19 16:05:40 testing simple program... [ 53.406730] cgroup: Unknown subsys name 'net' [ 53.476650] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 16:05:21 Registers: info registers vcpu 0 RAX=000055b2b414eeb0 RBX=000055b2b414eeb0 RCX=0000000000000010 RDX=0000000000000000 RSI=0000000000000023 RDI=000055b2b414eea0 RBP=0000000000000020 RSP=00007fff0e77c170 R8 =000055b2b417b02e R9 =00007f33f2595be0 R10=000000000000006f R11=0000000000000246 R12=000055b2b416ced0 R13=00007fff0e77c178 R14=00007f33f1fbeb22 R15=00007f33f1fe3710 RIP=00007f33f2b10397 RFL=00000202 [-------] CPL=3 II=0 A20=1 SMM=0 HLT=0 ES =0000 0000000000000000 00000000 00000000 CS =0033 0000000000000000 ffffffff 00a0fb00 DPL=3 CS64 [-RA] SS =002b 0000000000000000 ffffffff 00c0f300 DPL=3 DS [-WA] DS =0000 0000000000000000 00000000 00000000 FS =0000 00007f33f1fe3900 00000000 00000000 GS =0000 0000000000000000 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=00007f33f2598650 CR3=000000001695a000 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=23232323232323232323232323232323 XMM01=ffffffffffffff00ffff000000000000 XMM02=ffffffffffffff00ffff000000000000 XMM03=622073656e696c282073656e696c2074 XMM04=00000000000000000000000000000000 XMM05=00000000000000000000000000000000 XMM06=0d0c0f0e09080b0a0504070601000302 XMM07=00000000000000000000000000000000 XMM08=00000000000000810000363532616873 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=0000000000000000 RBX=ffff88806cf09b60 RCX=0000000000000001 RDX=0000000000000000 RSI=ffffffff8460144a RDI=ffff88806cf09b6c RBP=0000000000000009 RSP=ffff88806cf09a78 R8 =0000000000000001 R9 =ffff88806cf09ad8 R10=0000000000038001 R11=00000000000b523e R12=ffff88806cf09b60 R13=0000000000000000 R14=ffff888015eab680 R15=ffff88801a2dc1b0 RIP=ffffffff813ad4b6 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 00007f1eb329f900 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=00007f1eb26ab910 CR3=000000000c438000 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=8f0064ec8516772200000000000ae988 XMM05=d5471398d36455510000000000136500 XMM06=dfcdbad4f1609c3700000000001353b8 XMM07=00000000000000000000000000000000 XMM08=415453454d49545f454d49544c414552 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000