syzkaller login: [ 32.287389] BUG: Bad rss-counter state mm:00000000c9c60736 type:MM_FILEPAGES val:33 [ 32.288989] BUG: Bad rss-counter state mm:00000000c9c60736 type:MM_ANONPAGES val:22 [ 32.431959] ================================================================== [ 32.433247] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 32.434407] Read of size 8 at addr ffff88801831b058 by task sshd/219 [ 32.435448] [ 32.435706] CPU: 0 PID: 219 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 32.436779] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 32.437989] Call Trace: [ 32.438376] [ 32.438720] dump_stack_lvl+0x91/0xf0 [ 32.439305] print_report+0xcc/0x620 [ 32.439885] ? __virt_addr_valid+0x102/0x340 [ 32.440566] ? vma_interval_tree_remove+0xc75/0xec0 [ 32.441338] ? vma_interval_tree_remove+0xc75/0xec0 [ 32.441967] kasan_report+0xbe/0xf0 [ 32.442425] ? vma_interval_tree_remove+0xc75/0xec0 [ 32.443014] vma_interval_tree_remove+0xc75/0xec0 [ 32.443584] vma_prepare+0xc54/0x11a0 [ 32.444038] __split_vma+0x5af/0x950 [ 32.444498] ? __pfx___split_vma+0x10/0x10 [ 32.445029] ? find_held_lock+0x2c/0x110 [ 32.445523] do_vmi_align_munmap+0x2ba/0x11f0 [ 32.446059] ? lock_is_held_type+0x9f/0x120 [ 32.446569] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 32.447144] ? mtree_range_walk+0x632/0x900 [ 32.447664] ? mas_walk+0x5c7/0x7c0 [ 32.448116] do_vmi_munmap+0x1f1/0x2b0 [ 32.448603] mmap_region+0x1f9/0x2660 [ 32.449065] ? vm_mmap_pgoff+0x15c/0x3a0 [ 32.449548] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 32.450227] ? __pfx_lock_acquire+0x10/0x10 [ 32.450730] ? __pfx_mmap_region+0x10/0x10 [ 32.451234] ? security_mmap_addr+0x7d/0xa0 [ 32.451737] ? get_unmapped_area+0x1f5/0x3f0 [ 32.452255] do_mmap+0x854/0xf00 [ 32.452682] vm_mmap_pgoff+0x1a6/0x3a0 [ 32.453160] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 32.453705] ksys_mmap_pgoff+0x3af/0x500 [ 32.454190] do_syscall_64+0x3f/0x90 [ 32.454645] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 32.455273] RIP: 0033:0x7f51eb346d82 [ 32.455706] 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 [ 32.457768] RSP: 002b:00007ffdcc5e77e8 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 32.458638] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f51eb346d82 [ 32.459454] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f51ea780000 [ 32.460265] RBP: 00007f51ea780000 R08: 0000000000000009 R09: 0000000000001000 [ 32.461080] R10: 0000000000000812 R11: 0000000000000206 R12: 000055a35b026f70 [ 32.461892] R13: 00007ffdcc5e7800 R14: 00007ffdcc5e7830 R15: 00007ffdcc5e7b90 [ 32.462732] [ 32.463008] [ 32.463216] Allocated by task 212: [ 32.463630] kasan_save_stack+0x22/0x50 [ 32.464120] kasan_set_track+0x25/0x30 [ 32.464599] __kasan_slab_alloc+0x59/0x70 [ 32.465110] kmem_cache_alloc+0x16b/0x370 [ 32.465605] vm_area_dup+0x20/0x160 [ 32.466037] __split_vma+0x170/0x950 [ 32.466484] split_vma+0xc6/0x110 [ 32.466904] mprotect_fixup+0x8d2/0xb30 [ 32.467382] do_mprotect_pkey+0x87e/0xd40 [ 32.467883] __x64_sys_mprotect+0x78/0xc0 [ 32.468385] do_syscall_64+0x3f/0x90 [ 32.468868] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 32.469482] [ 32.469698] Freed by task 212: [ 32.470074] kasan_save_stack+0x22/0x50 [ 32.470549] kasan_set_track+0x25/0x30 [ 32.471023] kasan_save_free_info+0x2b/0x50 [ 32.471523] __kasan_slab_free+0x10a/0x190 [ 32.472031] kmem_cache_free+0x10d/0x4d0 [ 32.472511] rcu_core+0x8c8/0x2860 [ 32.472942] __do_softirq+0x1b7/0x7d4 [ 32.473391] [ 32.473596] Last potentially related work creation: [ 32.474145] kasan_save_stack+0x22/0x50 [ 32.474618] __kasan_record_aux_stack+0x8e/0xa0 [ 32.475163] __call_rcu_common.constprop.0+0x6a/0xb90 [ 32.475769] remove_vma+0x139/0x170 [ 32.476193] do_vmi_align_munmap+0xd4a/0x11f0 [ 32.476722] do_vmi_munmap+0x1f1/0x2b0 [ 32.477207] __vm_munmap+0x138/0x3a0 [ 32.477682] __x64_sys_munmap+0x59/0x80 [ 32.478170] do_syscall_64+0x3f/0x90 [ 32.478635] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 32.479273] [ 32.479488] The buggy address belongs to the object at ffff88801831b000 [ 32.479488] which belongs to the cache vm_area_struct of size 168 [ 32.481009] The buggy address is located 88 bytes inside of [ 32.481009] freed 168-byte region [ffff88801831b000, ffff88801831b0a8) [ 32.482421] [ 32.482645] The buggy address belongs to the physical page: [ 32.483323] page:0000000026173f72 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x1831b [ 32.484434] memcg:ffff88800d02ae01 [ 32.484880] flags: 0x100000000000200(slab|node=0|zone=1) [ 32.485535] page_type: 0xffffffff() [ 32.485993] raw: 0100000000000200 ffff88800879fc80 dead000000000122 0000000000000000 [ 32.486914] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800d02ae01 [ 32.487835] page dumped because: kasan: bad access detected [ 32.488508] [ 32.488741] Memory state around the buggy address: [ 32.489335] ffff88801831af00: fb fb fb fb fb fb fc fc fc fc fc fc fc fc fc fc [ 32.490210] ffff88801831af80: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc [ 32.491081] >ffff88801831b000: fa fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 32.491951] ^ [ 32.492691] ffff88801831b080: fb fb fb fb fb fc fc fc fc fc fc fc fc fa fb fb [ 32.493553] ffff88801831b100: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 32.494427] ================================================================== [ 32.495390] Disabling lock debugging due to kernel taint [ 34.544140] BUG: Bad rss-counter state mm:00000000df446d4b type:MM_FILEPAGES val:33 [ 34.545718] BUG: Bad rss-counter state mm:00000000df446d4b type:MM_ANONPAGES val:22 [ 34.991446] BUG: Bad rss-counter state mm:00000000e9cc1fe2 type:MM_FILEPAGES val:33 [ 34.992477] BUG: Bad rss-counter state mm:00000000e9cc1fe2 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:6591' (ECDSA) to the list of known hosts. 2023/06/20 05:23:58 fuzzer started 2023/06/20 05:23:58 dialing manager at localhost:44161 2023/06/20 05:23:58 checking machine... 2023/06/20 05:23:58 checking revisions... [ 35.686538] kmemleak: Automatic memory scanning thread ended 2023/06/20 05:23:58 testing simple program... [ 35.738710] cgroup: Unknown subsys name 'net' [ 35.788956] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 05:23:57 Registers: info registers vcpu 0 RAX=0000000080000000 RBX=0000000000000000 RCX=0000000000000000 RDX=0000000000001000 RSI=0000000000000000 RDI=ffffea00006b5340 RBP=0000000000001000 RSP=ffff88800c8f7ac0 R8 =0000000000000005 R9 =0000000000000000 R10=0000000000000000 R11=0000000000000000 R12=ffffea00006b5340 R13=ffffea00006b5340 R14=0000000000000000 R15=ffff88800c8f7db0 RIP=ffffffff814c07eb 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 00007ff23b1e3900 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=00007ff23b798650 CR3=000000001c9f8000 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=2c2c2c2c2c2c2c2c2c2c2c2c2c2c2c2c XMM01=00ff00000000000000000000000000ff XMM02=00ff00000000000000000000000000ff XMM03=66207463656e6e6f6373696420646576 XMM04=00000000000000000000000000000000 XMM05=00000000000000000000000000000000 XMM06=0d0c0f0e09080b0a0504070601000302 XMM07=00000000000000000000000000000000 XMM08=6500273d2720676e6974636570786500 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=ffff88806cf35000 RBX=0000000000000001 RCX=ffffffff8450c50e RDX=ffffed100d9e6a01 RSI=0000000000000004 RDI=ffffffff812889a5 RBP=dffffc0000000000 RSP=ffff888008e27e70 R8 =0000000000000000 R9 =ffffed100d9e6a00 R10=ffff88806cf35003 R11=0000000000000001 R12=ffffffff85d3bed0 R13=1ffff110011c4fd3 R14=0000000000000000 R15=0000000000000000 RIP=ffffffff8450d49f 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=00007ffc77c05bb8 CR3=000000000da26000 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=2038353a33323a3530203032206e754a XMM01=657463656e6e6f63736944203a5d3832 XMM02=302e303120746f6f722072657375206d XMM03=203a5d3832325b646873732072656c6c XMM04=69662068637573206f4e203a656c6163 XMM05=3a656c696620766e65206e65706f206f XMM06=65733a6468737328766e655f6d617020 XMM07=6b7a79732038353a33323a3530203032 XMM08=3d656e696c646d632022656369767265 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000