syzkaller login: [ 30.614400] BUG: Bad rss-counter state mm:00000000d10d014e type:MM_FILEPAGES val:33 [ 30.615755] BUG: Bad rss-counter state mm:00000000d10d014e type:MM_ANONPAGES val:22 [ 30.783843] ================================================================== [ 30.784615] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 30.785425] Read of size 8 at addr ffff88801a9d2df0 by task sshd/220 [ 30.786078] [ 30.786262] CPU: 0 PID: 220 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 30.786991] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 30.787890] Call Trace: [ 30.788200] [ 30.788437] dump_stack_lvl+0x91/0xf0 [ 30.788876] print_report+0xcc/0x620 [ 30.789286] ? __virt_addr_valid+0x102/0x340 [ 30.789749] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.790285] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.790803] kasan_report+0xbe/0xf0 [ 30.791202] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.791725] vma_interval_tree_remove+0xc75/0xec0 [ 30.792232] vma_prepare+0xc54/0x11a0 [ 30.792638] __split_vma+0x5af/0x950 [ 30.793046] ? __pfx___split_vma+0x10/0x10 [ 30.793488] ? find_held_lock+0x2c/0x110 [ 30.793926] do_vmi_align_munmap+0x2ba/0x11f0 [ 30.794405] ? lock_is_held_type+0x9f/0x120 [ 30.794859] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 30.795378] ? mtree_range_walk+0x632/0x900 [ 30.795850] ? mas_walk+0x5c7/0x7c0 [ 30.796251] do_vmi_munmap+0x1f1/0x2b0 [ 30.796668] mmap_region+0x1f9/0x2660 [ 30.797090] ? vm_mmap_pgoff+0x15c/0x3a0 [ 30.797536] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 30.798143] ? __pfx_lock_acquire+0x10/0x10 [ 30.798591] ? __pfx_mmap_region+0x10/0x10 [ 30.799040] ? security_mmap_addr+0x7d/0xa0 [ 30.799488] ? get_unmapped_area+0x1f5/0x3f0 [ 30.799964] do_mmap+0x854/0xf00 [ 30.800332] vm_mmap_pgoff+0x1a6/0x3a0 [ 30.800764] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 30.801249] ksys_mmap_pgoff+0x3af/0x500 [ 30.801688] do_syscall_64+0x3f/0x90 [ 30.802097] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.802661] RIP: 0033:0x7fc4195a1d82 [ 30.803054] 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 [ 30.804903] RSP: 002b:00007ffd36d94e38 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 30.805688] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007fc4195a1d82 [ 30.806412] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007fc4189db000 [ 30.807142] RBP: 00007fc4189db000 R08: 0000000000000009 R09: 0000000000001000 [ 30.807867] R10: 0000000000000812 R11: 0000000000000206 R12: 0000564b7235bb20 [ 30.808582] R13: 00007ffd36d94e50 R14: 00007ffd36d94e80 R15: 00007ffd36d951e0 [ 30.809314] [ 30.809563] [ 30.809745] Allocated by task 213: [ 30.810100] kasan_save_stack+0x22/0x50 [ 30.810523] kasan_set_track+0x25/0x30 [ 30.810931] __kasan_slab_alloc+0x59/0x70 [ 30.811364] kmem_cache_alloc+0x16b/0x370 [ 30.811799] vm_area_dup+0x20/0x160 [ 30.812180] __split_vma+0x170/0x950 [ 30.812563] split_vma+0xc6/0x110 [ 30.812958] mprotect_fixup+0x8d2/0xb30 [ 30.813378] do_mprotect_pkey+0x87e/0xd40 [ 30.813812] __x64_sys_mprotect+0x78/0xc0 [ 30.814250] do_syscall_64+0x3f/0x90 [ 30.814647] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.815184] [ 30.815363] Freed by task 213: [ 30.815693] kasan_save_stack+0x22/0x50 [ 30.816107] kasan_set_track+0x25/0x30 [ 30.816526] kasan_save_free_info+0x2b/0x50 [ 30.816979] __kasan_slab_free+0x10a/0x190 [ 30.817429] kmem_cache_free+0x10d/0x4d0 [ 30.817865] rcu_core+0x8c8/0x2860 [ 30.818232] __do_softirq+0x1b7/0x7d4 [ 30.818642] [ 30.818836] Last potentially related work creation: [ 30.819317] kasan_save_stack+0x22/0x50 [ 30.819733] __kasan_record_aux_stack+0x8e/0xa0 [ 30.820214] __call_rcu_common.constprop.0+0x6a/0xb90 [ 30.820756] remove_vma+0x139/0x170 [ 30.821171] do_vmi_align_munmap+0xd4a/0x11f0 [ 30.821657] do_vmi_munmap+0x1f1/0x2b0 [ 30.822077] __vm_munmap+0x138/0x3a0 [ 30.822483] __x64_sys_munmap+0x59/0x80 [ 30.822897] do_syscall_64+0x3f/0x90 [ 30.823317] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.823872] [ 30.824050] The buggy address belongs to the object at ffff88801a9d2d98 [ 30.824050] which belongs to the cache vm_area_struct of size 168 [ 30.825349] The buggy address is located 88 bytes inside of [ 30.825349] freed 168-byte region [ffff88801a9d2d98, ffff88801a9d2e40) [ 30.826564] [ 30.826752] The buggy address belongs to the physical page: [ 30.827320] page:00000000caf70ba5 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x1a9d2 [ 30.828256] memcg:ffff888009888401 [ 30.828622] flags: 0x100000000000200(slab|node=0|zone=1) [ 30.829184] page_type: 0xffffffff() [ 30.829573] raw: 0100000000000200 ffff8880087a0c80 dead000000000122 0000000000000000 [ 30.830364] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff888009888401 [ 30.831146] page dumped because: kasan: bad access detected [ 30.831712] [ 30.831899] Memory state around the buggy address: [ 30.832407] ffff88801a9d2c80: fc fc fc fc fc fc 00 00 00 00 00 00 00 00 00 00 [ 30.833150] ffff88801a9d2d00: 00 00 00 00 00 00 00 00 00 00 00 fc fc fc fc fc [ 30.833889] >ffff88801a9d2d80: fc fc fc fa fb fb fb fb fb fb fb fb fb fb fb fb [ 30.834622] ^ [ 30.835315] ffff88801a9d2e00: fb fb fb fb fb fb fb fb fc fc fc fc fc fc fc fc [ 30.836031] ffff88801a9d2e80: fa fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 30.836768] ================================================================== [ 30.837659] Disabling lock debugging due to kernel taint [ 32.146432] BUG: Bad rss-counter state mm:00000000804b43a3 type:MM_FILEPAGES val:33 [ 32.147021] BUG: Bad rss-counter state mm:00000000804b43a3 type:MM_ANONPAGES val:22 [ 32.675251] BUG: Bad rss-counter state mm:00000000d7ba908f type:MM_FILEPAGES val:33 [ 32.676433] BUG: Bad rss-counter state mm:00000000d7ba908f type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:17026' (ECDSA) to the list of known hosts. 2023/06/20 12:12:10 fuzzer started 2023/06/20 12:12:11 dialing manager at localhost:36067 2023/06/20 12:12:11 checking machine... 2023/06/20 12:12:11 checking revisions... [ 33.270310] kmemleak: Automatic memory scanning thread ended 2023/06/20 12:12:11 testing simple program... [ 33.316794] cgroup: Unknown subsys name 'net' [ 33.356802] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 12:12:10 Registers: info registers vcpu 0 RAX=ffff88806ce35000 RBX=0000000000000000 RCX=ffffffff8451250e RDX=ffffed100d9c6a01 RSI=0000000000000004 RDI=ffffffff81288ac5 RBP=dffffc0000000000 RSP=ffffffff85407e10 R8 =0000000000000000 R9 =ffffed100d9c6a00 R10=ffff88806ce35003 R11=ffff888008c04000 R12=ffffffff85d3d350 R13=1ffffffff0a80fc7 R14=0000000000000000 R15=0000000000000000 RIP=ffffffff8451349f 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 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=00007f121f4cc210 CR3=000000000c970000 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=970d7a86e3345aa316454737520f16ae XMM02=0000000000119d70eff9b2d0a8fce9cb XMM03=0000000000119e402c67c8bc2e329bc3 XMM04=fba07fa6be568ade00000000000ae988 XMM05=59d5b690e0af863b0000000000131540 XMM06=756c27893a9e46a800000000001303a8 XMM07=e042d86d42eb936e00000000001219e0 XMM08=3afca9d6ea9ef6490000000000119e40 XMM09=00000000000000000000000000000000 XMM10=20200000000020202020202020200000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=ffff88806cf35000 RBX=0000000000000001 RCX=ffffffff8451250e RDX=ffffed100d9e6a01 RSI=0000000000000004 RDI=ffffffff81288ac5 RBP=dffffc0000000000 RSP=ffff888008e07e70 R8 =0000000000000000 R9 =ffffed100d9e6a00 R10=ffff88806cf35003 R11=ffff888008c04400 R12=ffffffff85d3d350 R13=1ffff110011c0fd3 R14=0000000000000000 R15=0000000000000000 RIP=ffffffff8451349f 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=00007f22476f7618 CR3=000000000da7c000 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=2030313a32313a3231203032206e754a XMM01=73732878696e755f6d6170203a5d3133 XMM02=65736f6c63206e6f6973736573203a29 XMM03=755f6d6170203a5d3133325b64687373 XMM04=69662068637573206f4e203a656c6163 XMM05=3a656c696620766e65206e65706f206f XMM06=65733a6468737328766e655f6d617020 XMM07=6b7a79732030313a32313a3231203032 XMM08=3d656e696c646d632022656369767265 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000