syzkaller login: [ 28.828149] BUG: Bad rss-counter state mm:0000000002396492 type:MM_FILEPAGES val:33 [ 28.829469] BUG: Bad rss-counter state mm:0000000002396492 type:MM_ANONPAGES val:22 [ 28.997725] ================================================================== [ 28.998706] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 28.999717] Read of size 8 at addr ffff88800fbf3b38 by task sshd/220 [ 29.000661] [ 29.000895] CPU: 0 PID: 220 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 29.001844] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 29.002901] Call Trace: [ 29.003247] [ 29.003557] dump_stack_lvl+0x91/0xf0 [ 29.004083] print_report+0xcc/0x620 [ 29.004605] ? __virt_addr_valid+0x102/0x340 [ 29.005200] ? vma_interval_tree_remove+0xc75/0xec0 [ 29.005873] ? vma_interval_tree_remove+0xc75/0xec0 [ 29.006534] kasan_report+0xbe/0xf0 [ 29.007045] ? vma_interval_tree_remove+0xc75/0xec0 [ 29.007708] vma_interval_tree_remove+0xc75/0xec0 [ 29.008355] vma_prepare+0xc54/0x11a0 [ 29.008872] __split_vma+0x5af/0x950 [ 29.009379] ? __pfx___split_vma+0x10/0x10 [ 29.009953] ? find_held_lock+0x2c/0x110 [ 29.010521] do_vmi_align_munmap+0x2ba/0x11f0 [ 29.011138] ? lock_is_held_type+0x9f/0x120 [ 29.011722] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 29.012379] ? mtree_range_walk+0x632/0x900 [ 29.012979] ? mas_walk+0x5c7/0x7c0 [ 29.013501] do_vmi_munmap+0x1f1/0x2b0 [ 29.014051] mmap_region+0x1f9/0x2660 [ 29.014584] ? vm_mmap_pgoff+0x15c/0x3a0 [ 29.015150] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 29.015921] ? __pfx_lock_acquire+0x10/0x10 [ 29.016499] ? __pfx_mmap_region+0x10/0x10 [ 29.017082] ? security_mmap_addr+0x7d/0xa0 [ 29.017663] ? get_unmapped_area+0x1f5/0x3f0 [ 29.018267] do_mmap+0x854/0xf00 [ 29.018742] vm_mmap_pgoff+0x1a6/0x3a0 [ 29.019280] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 29.019893] ksys_mmap_pgoff+0x3af/0x500 [ 29.020451] do_syscall_64+0x3f/0x90 [ 29.020976] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 29.021698] RIP: 0033:0x7f080844fd82 [ 29.022202] 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 [ 29.024502] RSP: 002b:00007ffe7e049ac8 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 29.025459] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f080844fd82 [ 29.026365] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f0807889000 [ 29.027272] RBP: 00007f0807889000 R08: 0000000000000009 R09: 0000000000001000 [ 29.028214] R10: 0000000000000812 R11: 0000000000000206 R12: 00005557a538aec0 [ 29.029117] R13: 00007ffe7e049ae0 R14: 00007ffe7e049b10 R15: 00007ffe7e049e70 [ 29.030045] [ 29.030355] [ 29.030586] Allocated by task 213: [ 29.031053] kasan_save_stack+0x22/0x50 [ 29.031595] kasan_set_track+0x25/0x30 [ 29.032130] __kasan_slab_alloc+0x59/0x70 [ 29.032702] kmem_cache_alloc+0x16b/0x370 [ 29.033259] vm_area_dup+0x20/0x160 [ 29.033771] __split_vma+0x170/0x950 [ 29.034283] split_vma+0xc6/0x110 [ 29.034760] mprotect_fixup+0x8d2/0xb30 [ 29.035304] do_mprotect_pkey+0x87e/0xd40 [ 29.035872] __x64_sys_mprotect+0x78/0xc0 [ 29.036435] do_syscall_64+0x3f/0x90 [ 29.036938] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 29.037636] [ 29.037869] Freed by task 213: [ 29.038294] kasan_save_stack+0x22/0x50 [ 29.038837] kasan_set_track+0x25/0x30 [ 29.039376] kasan_save_free_info+0x2b/0x50 [ 29.039956] __kasan_slab_free+0x10a/0x190 [ 29.040550] kmem_cache_free+0x10d/0x4d0 [ 29.041097] rcu_core+0x8c8/0x2860 [ 29.041567] __do_softirq+0x1b7/0x7d4 [ 29.042094] [ 29.042324] Last potentially related work creation: [ 29.042953] kasan_save_stack+0x22/0x50 [ 29.043499] __kasan_record_aux_stack+0x8e/0xa0 [ 29.044121] __call_rcu_common.constprop.0+0x6a/0xb90 [ 29.044816] remove_vma+0x139/0x170 [ 29.045310] do_vmi_align_munmap+0xd4a/0x11f0 [ 29.045948] do_vmi_munmap+0x1f1/0x2b0 [ 29.046468] __vm_munmap+0x138/0x3a0 [ 29.046963] __x64_sys_munmap+0x59/0x80 [ 29.047524] do_syscall_64+0x3f/0x90 [ 29.048045] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 29.048727] [ 29.048958] The buggy address belongs to the object at ffff88800fbf3ae0 [ 29.048958] which belongs to the cache vm_area_struct of size 168 [ 29.050526] The buggy address is located 88 bytes inside of [ 29.050526] freed 168-byte region [ffff88800fbf3ae0, ffff88800fbf3b88) [ 29.052024] [ 29.052253] The buggy address belongs to the physical page: [ 29.052958] page:00000000e5e65109 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xfbf3 [ 29.054130] memcg:ffff8880167cf301 [ 29.054581] flags: 0x100000000000200(slab|node=0|zone=1) [ 29.055265] page_type: 0xffffffff() [ 29.055745] raw: 0100000000000200 ffff8880087a0c80 dead000000000122 0000000000000000 [ 29.056721] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff8880167cf301 [ 29.057697] page dumped because: kasan: bad access detected [ 29.058402] [ 29.058633] Memory state around the buggy address: [ 29.059252] ffff88800fbf3a00: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 29.060159] ffff88800fbf3a80: 00 00 00 00 fc fc fc fc fc fc fc fc fa fb fb fb [ 29.061067] >ffff88800fbf3b00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 29.061991] ^ [ 29.062633] ffff88800fbf3b80: fb fc fc fc fc fc fc fc fc fa fb fb fb fb fb fb [ 29.063547] ffff88800fbf3c00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fc fc [ 29.064455] ================================================================== [ 29.065531] Disabling lock debugging due to kernel taint [ 30.872703] BUG: Bad rss-counter state mm:000000004a06d37b type:MM_FILEPAGES val:33 [ 30.874007] BUG: Bad rss-counter state mm:000000004a06d37b type:MM_ANONPAGES val:22 [ 31.326140] BUG: Bad rss-counter state mm:00000000754d685f type:MM_FILEPAGES val:33 [ 31.327150] BUG: Bad rss-counter state mm:00000000754d685f type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:11180' (ECDSA) to the list of known hosts. 2023/06/21 01:27:52 fuzzer started 2023/06/21 01:27:52 dialing manager at localhost:36067 2023/06/21 01:27:52 checking machine... 2023/06/21 01:27:52 checking revisions... [ 32.068571] kmemleak: Automatic memory scanning thread ended 2023/06/21 01:27:52 testing simple program... [ 32.120609] cgroup: Unknown subsys name 'net' [ 32.167853] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 01:27:52 Registers: info registers vcpu 0 RAX=0000000080000000 RBX=0000000000000049 RCX=ffffffff83723df5 RDX=ffff88800e9e0000 RSI=0000000000000000 RDI=0000000000000005 RBP=000000000000004a RSP=ffff888019c8f7b8 R8 =0000000000000005 R9 =0000000000000082 R10=0000000000000049 R11=00000000000b6a61 R12=000000000000000a R13=ffffffff87f99d28 R14=0000000000000000 R15=0000000000000006 RIP=ffffffff814c086b 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 00007f9cef47c900 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=00007ffe0463a000 CR3=000000001a220000 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=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 info registers vcpu 1 RAX=ffffffff85616740 RBX=ffffffff85d3e490 RCX=1ffffffff0ba7c92 RDX=1ffff1100d9e7458 RSI=00000000fffbe52e RDI=ffffffff85616780 RBP=00000000000061cd RSP=ffff88806cf09c58 R8 =00000000fffd7f56 R9 =fffffbfff0ba7a6a R10=00000000000061cd R11=ffff88806cf09ff8 R12=ffffffff85d3d41c R13=ffff88806cf3a2c0 R14=1ffff1100d9e139c R15=0000000000000000 RIP=ffffffff8137cd84 RFL=00000012 [----A--] 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=00007ff8c36a9680 CR3=000000000f67e000 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=2032353a37323a3130203132206e754a XMM01=73732878696e755f6d6170203a5d3932 XMM02=65736f6c63206e6f6973736573203a29 XMM03=755f6d6170203a5d3932325b64687373 XMM04=69662068637573206f4e203a656c6163 XMM05=3a656c696620766e65206e65706f206f XMM06=65733a6468737328766e655f6d617020 XMM07=6b7a79732031353a37323a3130203132 XMM08=3d656e696c646d632022656369767265 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000