syzkaller login: [ 30.538070] BUG: Bad rss-counter state mm:00000000dac044a6 type:MM_FILEPAGES val:33 [ 30.539099] BUG: Bad rss-counter state mm:00000000dac044a6 type:MM_ANONPAGES val:22 [ 30.717249] ================================================================== [ 30.718148] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 30.719095] Read of size 8 at addr ffff888009e2fed8 by task sshd/219 [ 30.719861] [ 30.720076] CPU: 0 PID: 219 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 30.721033] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 30.722024] Call Trace: [ 30.722343] <TASK> [ 30.722635] dump_stack_lvl+0x91/0xf0 [ 30.723118] print_report+0xcc/0x620 [ 30.723597] ? __virt_addr_valid+0x102/0x340 [ 30.724144] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.724757] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.725361] kasan_report+0xbe/0xf0 [ 30.725829] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.726448] vma_interval_tree_remove+0xc75/0xec0 [ 30.727083] vma_prepare+0xc54/0x11a0 [ 30.727559] __split_vma+0x5af/0x950 [ 30.728025] ? __pfx___split_vma+0x10/0x10 [ 30.728547] ? find_held_lock+0x2c/0x110 [ 30.729069] do_vmi_align_munmap+0x2ba/0x11f0 [ 30.729632] ? lock_is_held_type+0x9f/0x120 [ 30.730165] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 30.730782] ? mtree_range_walk+0x632/0x900 [ 30.731331] ? mas_walk+0x5c7/0x7c0 [ 30.731805] do_vmi_munmap+0x1f1/0x2b0 [ 30.732299] mmap_region+0x1f9/0x2660 [ 30.732775] ? vm_mmap_pgoff+0x15c/0x3a0 [ 30.733276] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 30.733986] ? __pfx_lock_acquire+0x10/0x10 [ 30.734528] ? __pfx_mmap_region+0x10/0x10 [ 30.735053] ? security_mmap_addr+0x7d/0xa0 [ 30.735580] ? get_unmapped_area+0x1f5/0x3f0 [ 30.736119] do_mmap+0x854/0xf00 [ 30.736559] vm_mmap_pgoff+0x1a6/0x3a0 [ 30.737059] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 30.737618] ksys_mmap_pgoff+0x3af/0x500 [ 30.738125] do_syscall_64+0x3f/0x90 [ 30.738613] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.739260] RIP: 0033:0x7f86f7b31d82 [ 30.739717] 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 [ 30.741827] RSP: 002b:00007fff59850ed8 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 30.742793] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f86f7b31d82 [ 30.743704] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f86f6f6b000 [ 30.744598] RBP: 00007f86f6f6b000 R08: 0000000000000009 R09: 0000000000001000 [ 30.745521] R10: 0000000000000812 R11: 0000000000000206 R12: 000056170838cf70 [ 30.746431] R13: 00007fff59850ef0 R14: 00007fff59850f20 R15: 00007fff59851280 [ 30.747352] </TASK> [ 30.747660] [ 30.747886] Allocated by task 212: [ 30.748352] kasan_save_stack+0x22/0x50 [ 30.748888] kasan_set_track+0x25/0x30 [ 30.749425] __kasan_slab_alloc+0x59/0x70 [ 30.749974] kmem_cache_alloc+0x16b/0x370 [ 30.750541] vm_area_dup+0x20/0x160 [ 30.751022] __split_vma+0x170/0x950 [ 30.751520] split_vma+0xc6/0x110 [ 30.751987] mprotect_fixup+0x8d2/0xb30 [ 30.752521] do_mprotect_pkey+0x87e/0xd40 [ 30.753076] __x64_sys_mprotect+0x78/0xc0 [ 30.753634] do_syscall_64+0x3f/0x90 [ 30.754140] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.754836] [ 30.755064] Freed by task 19: [ 30.755480] kasan_save_stack+0x22/0x50 [ 30.756012] kasan_set_track+0x25/0x30 [ 30.756536] kasan_save_free_info+0x2b/0x50 [ 30.757109] __kasan_slab_free+0x10a/0x190 [ 30.757684] kmem_cache_free+0x10d/0x4d0 [ 30.758224] rcu_core+0x8c8/0x2860 [ 30.758703] __do_softirq+0x1b7/0x7d4 [ 30.759211] [ 30.759438] Last potentially related work creation: [ 30.760066] kasan_save_stack+0x22/0x50 [ 30.760604] __kasan_record_aux_stack+0x8e/0xa0 [ 30.761214] __call_rcu_common.constprop.0+0x6a/0xb90 [ 30.761898] remove_vma+0x139/0x170 [ 30.762380] do_vmi_align_munmap+0xd4a/0x11f0 [ 30.762989] do_vmi_munmap+0x1f1/0x2b0 [ 30.763512] __vm_munmap+0x138/0x3a0 [ 30.764012] __x64_sys_munmap+0x59/0x80 [ 30.764547] do_syscall_64+0x3f/0x90 [ 30.765061] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.765747] [ 30.765975] The buggy address belongs to the object at ffff888009e2fe80 [ 30.765975] which belongs to the cache vm_area_struct of size 168 [ 30.767558] The buggy address is located 88 bytes inside of [ 30.767558] freed 168-byte region [ffff888009e2fe80, ffff888009e2ff28) [ 30.769074] [ 30.769303] The buggy address belongs to the physical page: [ 30.770013] page:00000000a750f46f refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x9e2f [ 30.771207] memcg:ffff88800e5e4b01 [ 30.771664] flags: 0x100000000000200(slab|node=0|zone=1) [ 30.772358] page_type: 0xffffffff() [ 30.772848] raw: 0100000000000200 ffff8880087a0c80 dead000000000122 0000000000000000 [ 30.773834] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800e5e4b01 [ 30.774823] page dumped because: kasan: bad access detected [ 30.775533] [ 30.775764] Memory state around the buggy address: [ 30.776372] ffff888009e2fd80: fc fc fc 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 30.777258] ffff888009e2fe00: 00 00 00 00 00 00 00 00 fc fc fc fc fc fc fc fc [ 30.778159] >ffff888009e2fe80: fa fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 30.779061] ^ [ 30.779799] ffff888009e2ff00: fb fb fb fb fb fc fc fc fc fc fc fc fc fc fc fc [ 30.780681] ffff888009e2ff80: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc [ 30.781549] ================================================================== [ 30.782608] Disabling lock debugging due to kernel taint [ 32.785377] BUG: Bad rss-counter state mm:00000000eded00af type:MM_FILEPAGES val:33 [ 32.786401] BUG: Bad rss-counter state mm:00000000eded00af type:MM_ANONPAGES val:22 [ 33.258488] BUG: Bad rss-counter state mm:000000002e39c13a type:MM_FILEPAGES val:33 [ 33.259586] BUG: Bad rss-counter state mm:000000002e39c13a type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:46589' (ECDSA) to the list of known hosts. 2023/06/20 21:50:17 fuzzer started 2023/06/20 21:50:18 dialing manager at localhost:36067 2023/06/20 21:50:18 checking machine... 2023/06/20 21:50:18 checking revisions... [ 34.054779] kmemleak: Automatic memory scanning thread ended 2023/06/20 21:50:18 testing simple program... [ 34.103880] cgroup: Unknown subsys name 'net' [ 34.167784] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 21:50:17 Registers: info registers vcpu 0 RAX=dffffc0000000000 RBX=0000000000000001 RCX=ffffffff81af9b5c RDX=000000000000af9b RSI=000000000000af9b RDI=ffffffff8651585c RBP=ffff888015fa75f8 RSP=ffff888015fa7530 R8 =0000000000000000 R9 =ffff888015fa75e0 R10=0000000000038001 R11=00000000000246fc R12=ffff888015fa7600 R13=ffff888015fa75e8 R14=ffff888015fa75e1 R15=ffff888015fa75a0 RIP=ffffffff8113077a RFL=00000213 [----A-C] 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 00007f42d57dc700 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=0000562b4589d798 CR3=000000000ed7a000 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=2037313a30353a3132203032206e754a XMM01=657463656e6e6f63736944203a5d3832 XMM02=302e303120746f6f722072657375206d XMM03=203a5d3832325b646873732072656c6c XMM04=69662068637573206f4e203a656c6163 XMM05=3a656c696620766e65206e65706f206f XMM06=65733a6468737328766e655f6d617020 XMM07=6b7a79732037313a30353a3132203032 XMM08=3d656e696c646d632022656369767265 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=ffff888018df8001 RBX=ffff888018df7b50 RCX=0000000000000001 RDX=ffff888018df7b58 RSI=ffff888018df7b28 RDI=ffff888018df73a0 RBP=ffff888018df0000 RSP=ffff888018df7320 R8 =0000000000000001 R9 =ffff888018df73d0 R10=0000000000038001 R11=000000000008a835 R12=ffff888018df73f0 R13=ffff888018df73d8 R14=ffff888018df7b28 R15=ffff888018df7390 RIP=ffffffff81131cda RFL=00000202 [-------] 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 00007fb4e0be9900 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=00007ffd4c70b000 CR3=000000000e220000 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=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