syzkaller login: [ 30.697364] BUG: Bad rss-counter state mm:00000000148e667c type:MM_FILEPAGES val:33 [ 30.698103] BUG: Bad rss-counter state mm:00000000148e667c type:MM_ANONPAGES val:22 [ 30.807204] ================================================================== [ 30.807895] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 30.808611] Read of size 8 at addr ffff888018f2b968 by task sshd/220 [ 30.809212] [ 30.809382] CPU: 0 PID: 220 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 30.810047] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 30.810792] Call Trace: [ 30.811115] [ 30.811338] dump_stack_lvl+0x91/0xf0 [ 30.811713] print_report+0xcc/0x620 [ 30.812079] ? __virt_addr_valid+0x102/0x340 [ 30.812502] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.812994] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.813406] kasan_report+0xbe/0xf0 [ 30.813664] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.814004] vma_interval_tree_remove+0xc75/0xec0 [ 30.814336] vma_prepare+0xc54/0x11a0 [ 30.814599] __split_vma+0x5af/0x950 [ 30.814856] ? __pfx___split_vma+0x10/0x10 [ 30.815140] ? find_held_lock+0x2c/0x110 [ 30.815424] do_vmi_align_munmap+0x2ba/0x11f0 [ 30.815732] ? lock_is_held_type+0x9f/0x120 [ 30.816025] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 30.816366] ? mtree_range_walk+0x632/0x900 [ 30.816674] ? mas_walk+0x5c7/0x7c0 [ 30.816950] do_vmi_munmap+0x1f1/0x2b0 [ 30.817232] mmap_region+0x1f9/0x2660 [ 30.817505] ? vm_mmap_pgoff+0x15c/0x3a0 [ 30.817795] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 30.818205] ? __pfx_lock_acquire+0x10/0x10 [ 30.818514] ? __pfx_mmap_region+0x10/0x10 [ 30.818819] ? security_mmap_addr+0x7d/0xa0 [ 30.819127] ? get_unmapped_area+0x1f5/0x3f0 [ 30.819442] do_mmap+0x854/0xf00 [ 30.819690] vm_mmap_pgoff+0x1a6/0x3a0 [ 30.819975] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 30.820293] ksys_mmap_pgoff+0x3af/0x500 [ 30.820585] do_syscall_64+0x3f/0x90 [ 30.820863] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.821234] RIP: 0033:0x7f0b91e0ad82 [ 30.821500] 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 [ 30.822693] RSP: 002b:00007fffeef8f7c8 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 30.823201] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f0b91e0ad82 [ 30.823684] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f0b91244000 [ 30.824167] RBP: 00007f0b91244000 R08: 0000000000000009 R09: 0000000000001000 [ 30.824646] R10: 0000000000000812 R11: 0000000000000206 R12: 00005596115ad980 [ 30.825141] R13: 00007fffeef8f7e0 R14: 00007fffeef8f810 R15: 00007fffeef8fb70 [ 30.825632] [ 30.825793] [ 30.825918] Allocated by task 213: [ 30.826157] kasan_save_stack+0x22/0x50 [ 30.826444] kasan_set_track+0x25/0x30 [ 30.826728] __kasan_slab_alloc+0x59/0x70 [ 30.827028] kmem_cache_alloc+0x16b/0x370 [ 30.827332] vm_area_dup+0x20/0x160 [ 30.827599] __split_vma+0x170/0x950 [ 30.827862] split_vma+0xc6/0x110 [ 30.828114] mprotect_fixup+0x8d2/0xb30 [ 30.828399] do_mprotect_pkey+0x87e/0xd40 [ 30.828697] __x64_sys_mprotect+0x78/0xc0 [ 30.828997] do_syscall_64+0x3f/0x90 [ 30.829262] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.829628] [ 30.829749] Freed by task 213: [ 30.829970] kasan_save_stack+0x22/0x50 [ 30.830256] kasan_set_track+0x25/0x30 [ 30.830537] kasan_save_free_info+0x2b/0x50 [ 30.830845] __kasan_slab_free+0x10a/0x190 [ 30.831150] kmem_cache_free+0x10d/0x4d0 [ 30.831442] rcu_core+0x8c8/0x2860 [ 30.831700] __do_softirq+0x1b7/0x7d4 [ 30.831976] [ 30.832096] Last potentially related work creation: [ 30.832435] kasan_save_stack+0x22/0x50 [ 30.832717] __kasan_record_aux_stack+0x8e/0xa0 [ 30.833052] __call_rcu_common.constprop.0+0x6a/0xb90 [ 30.833426] remove_vma+0x139/0x170 [ 30.833681] do_vmi_align_munmap+0xd4a/0x11f0 [ 30.833995] do_vmi_munmap+0x1f1/0x2b0 [ 30.834275] __vm_munmap+0x138/0x3a0 [ 30.834541] __x64_sys_munmap+0x59/0x80 [ 30.834821] do_syscall_64+0x3f/0x90 [ 30.835095] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.835461] [ 30.835582] The buggy address belongs to the object at ffff888018f2b910 [ 30.835582] which belongs to the cache vm_area_struct of size 168 [ 30.836398] The buggy address is located 88 bytes inside of [ 30.836398] freed 168-byte region [ffff888018f2b910, ffff888018f2b9b8) [ 30.837194] [ 30.837316] The buggy address belongs to the physical page: [ 30.837699] page:00000000ad031c30 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x18f2b [ 30.838325] memcg:ffff888017e37c01 [ 30.838572] flags: 0x100000000000200(slab|node=0|zone=1) [ 30.838935] page_type: 0xffffffff() [ 30.839188] raw: 0100000000000200 ffff88800879fc80 dead000000000122 0000000000000000 [ 30.839717] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff888017e37c01 [ 30.840225] page dumped because: kasan: bad access detected [ 30.840609] [ 30.840730] Memory state around the buggy address: [ 30.841083] ffff888018f2b800: fc fc fc fc fc 00 00 00 00 00 00 00 00 00 00 00 [ 30.841574] ffff888018f2b880: 00 00 00 00 00 00 00 00 00 00 fc fc fc fc fc fc [ 30.842052] >ffff888018f2b900: fc fc fa fb fb fb fb fb fb fb fb fb fb fb fb fb [ 30.842546] ^ [ 30.842995] ffff888018f2b980: fb fb fb fb fb fb fb fc fc fc fc fc fc fc fc fa [ 30.843493] ffff888018f2ba00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 30.843977] ================================================================== [ 30.844526] Disabling lock debugging due to kernel taint [ 33.378421] BUG: Bad rss-counter state mm:00000000ef444d8c type:MM_FILEPAGES val:33 [ 33.379461] BUG: Bad rss-counter state mm:00000000ef444d8c type:MM_ANONPAGES val:22 [ 33.944227] BUG: Bad rss-counter state mm:0000000095b01d8f type:MM_FILEPAGES val:33 [ 33.945390] BUG: Bad rss-counter state mm:0000000095b01d8f type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:11337' (ECDSA) to the list of known hosts. 2023/06/19 18:43:02 fuzzer started 2023/06/19 18:43:02 dialing manager at localhost:44161 2023/06/19 18:43:02 checking machine... 2023/06/19 18:43:02 checking revisions... [ 34.581266] kmemleak: Automatic memory scanning thread ended 2023/06/19 18:43:02 testing simple program... [ 34.625456] cgroup: Unknown subsys name 'net' [ 34.664643] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 18:43:02 Registers: info registers vcpu 0 RAX=1ffff110018a3f1d RBX=ffff88800c51f8b8 RCX=ffffffff812e00e5 RDX=0000000000000000 RSI=0000000000000000 RDI=ffff88800c51f8e8 RBP=ffff88800d86df80 RSP=ffff888008d7fc98 R8 =0000000000000001 R9 =ffffed10011aff87 R10=0000000000000003 R11=0000000000000128 R12=dffffc0000000000 R13=ffff88800d870780 R14=ffffffff8186b9c5 R15=ffff888019e2e780 RIP=ffffffff8184636c RFL=00000046 [---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 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=00007fff015525b8 CR3=000000001460a000 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=2032303a33343a3831203931206e754a XMM01=657463656e6e6f63736944203a5d3932 XMM02=302e303120746f6f722072657375206d XMM03=203a5d3932325b646873732072656c6c XMM04=69662068637573206f4e203a656c6163 XMM05=3a656c696620766e65206e65706f206f XMM06=65733a6468737328766e655f6d617020 XMM07=6b7a79732031303a33343a3831203931 XMM08=3d656e696c646d632022656369767265 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=0000000000000001 RBX=ffffffff813ad420 RCX=ffffffff864bb001 RDX=ffff888008e27e78 RSI=0000000000000000 RDI=ffff88806cf09a88 RBP=ffff88806cf09b10 RSP=ffff88806cf09a78 R8 =ffffffff864bb032 R9 =ffff88806cf09ab8 R10=0000000000038001 R11=00000000000b6cb2 R12=ffff88806cf09b40 R13=0000000000000000 R14=ffff888008d751c0 R15=ffff888019e2e780 RIP=ffffffff810bd057 RFL=00000292 [--S-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=00007f0e7a624680 CR3=000000000ca32000 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=00000000000000000000000000000000 XMM01=7fef355cf8a8dfb191435e1f702955d9 XMM02=000000000011d2b0eff9b2d0a8fce9cb XMM03=000000000011d3802c67c8bc2e329bc3 XMM04=56c3bdd342372ac900000000000ae988 XMM05=5ac61e494070cea30000000000134970 XMM06=4fda316b135da52b0000000000133a10 XMM07=e042d86d42eb936e00000000001241f8 XMM08=851c60002295f78a000000000011d380 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000