syzkaller login: [ 38.610040] BUG: Bad rss-counter state mm:00000000d64fbc53 type:MM_FILEPAGES val:33 [ 38.610941] BUG: Bad rss-counter state mm:00000000d64fbc53 type:MM_ANONPAGES val:22 [ 38.731562] ================================================================== [ 38.732301] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 38.733007] Read of size 8 at addr ffff88800dcb1310 by task sshd/219 [ 38.733560] [ 38.733738] CPU: 0 PID: 219 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 38.734360] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 38.735063] Call Trace: [ 38.735298] [ 38.735634] dump_stack_lvl+0x91/0xf0 [ 38.735996] print_report+0xcc/0x620 [ 38.736335] ? __virt_addr_valid+0x102/0x340 [ 38.736735] ? vma_interval_tree_remove+0xc75/0xec0 [ 38.737178] ? vma_interval_tree_remove+0xc75/0xec0 [ 38.737689] kasan_report+0xbe/0xf0 [ 38.738041] ? vma_interval_tree_remove+0xc75/0xec0 [ 38.738481] vma_interval_tree_remove+0xc75/0xec0 [ 38.738915] vma_prepare+0xc54/0x11a0 [ 38.739250] __split_vma+0x5af/0x950 [ 38.739600] ? __pfx___split_vma+0x10/0x10 [ 38.739985] ? find_held_lock+0x2c/0x110 [ 38.740372] do_vmi_align_munmap+0x2ba/0x11f0 [ 38.740788] ? lock_is_held_type+0x9f/0x120 [ 38.741183] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 38.741646] ? mtree_range_walk+0x632/0x900 [ 38.742057] ? mas_walk+0x5c7/0x7c0 [ 38.742406] do_vmi_munmap+0x1f1/0x2b0 [ 38.742768] mmap_region+0x1f9/0x2660 [ 38.743165] ? vm_mmap_pgoff+0x15c/0x3a0 [ 38.743539] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 38.744051] ? __pfx_lock_acquire+0x10/0x10 [ 38.744447] ? __pfx_mmap_region+0x10/0x10 [ 38.744843] ? security_mmap_addr+0x7d/0xa0 [ 38.745230] ? get_unmapped_area+0x1f5/0x3f0 [ 38.745662] do_mmap+0x854/0xf00 [ 38.745979] vm_mmap_pgoff+0x1a6/0x3a0 [ 38.746335] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 38.746738] ksys_mmap_pgoff+0x3af/0x500 [ 38.747113] do_syscall_64+0x3f/0x90 [ 38.747461] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 38.747940] RIP: 0033:0x7f37fca39d82 [ 38.748274] 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 [ 38.749878] RSP: 002b:00007ffcb6eec278 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 38.750533] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f37fca39d82 [ 38.751167] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f37fbe73000 [ 38.751779] RBP: 00007f37fbe73000 R08: 0000000000000009 R09: 0000000000001000 [ 38.752396] R10: 0000000000000812 R11: 0000000000000206 R12: 0000558d730bed90 [ 38.753012] R13: 00007ffcb6eec290 R14: 00007ffcb6eec2c0 R15: 00007ffcb6eec620 [ 38.753656] [ 38.753872] [ 38.754039] Allocated by task 212: [ 38.754345] kasan_save_stack+0x22/0x50 [ 38.754710] kasan_set_track+0x25/0x30 [ 38.755074] __kasan_slab_alloc+0x59/0x70 [ 38.755461] kmem_cache_alloc+0x16b/0x370 [ 38.755841] vm_area_dup+0x20/0x160 [ 38.756166] __split_vma+0x170/0x950 [ 38.756500] split_vma+0xc6/0x110 [ 38.756812] mprotect_fixup+0x8d2/0xb30 [ 38.757180] do_mprotect_pkey+0x87e/0xd40 [ 38.757555] __x64_sys_mprotect+0x78/0xc0 [ 38.757957] do_syscall_64+0x3f/0x90 [ 38.758227] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 38.758593] [ 38.758714] Freed by task 212: [ 38.758940] kasan_save_stack+0x22/0x50 [ 38.759223] kasan_set_track+0x25/0x30 [ 38.759504] kasan_save_free_info+0x2b/0x50 [ 38.759813] __kasan_slab_free+0x10a/0x190 [ 38.760115] kmem_cache_free+0x10d/0x4d0 [ 38.760402] rcu_core+0x8c8/0x2860 [ 38.760655] __do_softirq+0x1b7/0x7d4 [ 38.760928] [ 38.761056] Last potentially related work creation: [ 38.761389] kasan_save_stack+0x22/0x50 [ 38.761761] __kasan_record_aux_stack+0x8e/0xa0 [ 38.762173] __call_rcu_common.constprop.0+0x6a/0xb90 [ 38.762636] remove_vma+0x139/0x170 [ 38.762961] do_vmi_align_munmap+0xd4a/0x11f0 [ 38.763363] do_vmi_munmap+0x1f1/0x2b0 [ 38.763709] __vm_munmap+0x138/0x3a0 [ 38.764058] __x64_sys_munmap+0x59/0x80 [ 38.764413] do_syscall_64+0x3f/0x90 [ 38.764753] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 38.765219] [ 38.765379] The buggy address belongs to the object at ffff88800dcb12b8 [ 38.765379] which belongs to the cache vm_area_struct of size 168 [ 38.766500] The buggy address is located 88 bytes inside of [ 38.766500] freed 168-byte region [ffff88800dcb12b8, ffff88800dcb1360) [ 38.767496] [ 38.767653] The buggy address belongs to the physical page: [ 38.768137] page:00000000e5a3041b refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xdcb1 [ 38.768911] memcg:ffff88800f297601 [ 38.769226] flags: 0x100000000000200(slab|node=0|zone=1) [ 38.769712] page_type: 0xffffffff() [ 38.770033] raw: 0100000000000200 ffff8880087a0c80 ffffea00003868c0 dead000000000002 [ 38.770700] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800f297601 [ 38.771350] page dumped because: kasan: bad access detected [ 38.771832] [ 38.771983] Memory state around the buggy address: [ 38.772404] ffff88800dcb1200: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 fc [ 38.773023] ffff88800dcb1280: fc fc fc fc fc fc fc fa fb fb fb fb fb fb fb fb [ 38.773703] >ffff88800dcb1300: fb fb fb fb fb fb fb fb fb fb fb fb fc fc fc fc [ 38.774337] ^ [ 38.774678] ffff88800dcb1380: fc fc fc fc fa fb fb fb fb fb fb fb fb fb fb fb [ 38.775302] ffff88800dcb1400: fb fb fb fb fb fb fb fb fb fc fc fc fc fc fc fc [ 38.775914] ================================================================== [ 38.776766] Disabling lock debugging due to kernel taint [ 40.323794] BUG: Bad rss-counter state mm:000000000edb643e type:MM_FILEPAGES val:33 [ 40.324523] BUG: Bad rss-counter state mm:000000000edb643e type:MM_ANONPAGES val:22 [ 40.688990] BUG: Bad rss-counter state mm:00000000d72ecb53 type:MM_FILEPAGES val:33 [ 40.689688] BUG: Bad rss-counter state mm:00000000d72ecb53 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:43966' (ECDSA) to the list of known hosts. 2023/06/21 09:06:14 fuzzer started 2023/06/21 09:06:14 dialing manager at localhost:36067 2023/06/21 09:06:14 checking machine... 2023/06/21 09:06:14 checking revisions... [ 41.249370] kmemleak: Automatic memory scanning thread ended 2023/06/21 09:06:14 testing simple program... [ 41.283073] cgroup: Unknown subsys name 'net' [ 41.317820] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 09:06:14 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=00007fc2836947d0 CR3=000000001a042000 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=2033313a36303a3930203132206e754a XMM01=73732878696e755f6d6170203a5d3832 XMM02=65736f6c63206e6f6973736573203a29 XMM03=755f6d6170203a5d3832325b64687373 XMM04=69662068637573206f4e203a656c6163 XMM05=3a656c696620766e65206e65706f206f XMM06=65733a6468737328766e655f6d617020 XMM07=6b7a79732033313a36303a3930203132 XMM08=3d656e696c646d632022656369767265 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=ffff888019aaa590 RBX=ffff88806cf09ee8 RCX=1ffff110033554b2 RDX=ffff8880182bc508 RSI=0000000000000008 RDI=ffff88806cf09ef8 RBP=0000000000000007 RSP=ffff88806cf09e50 R8 =0000000000000000 R9 =fffffbfff0ba7a6a R10=ffffffff85d3d357 R11=00000000000b6a61 R12=dffffc0000000000 R13=ffff88806cf09ee8 R14=ffff88806cf35000 R15=ffff888019aa8e60 RIP=ffffffff8137fcd9 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 00007f8af6ec0900 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=00007ffd1fdbd000 CR3=00000000167ca000 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