syzkaller login: [ 37.607301] BUG: Bad rss-counter state mm:000000000018dc10 type:MM_FILEPAGES val:33 [ 37.608037] BUG: Bad rss-counter state mm:000000000018dc10 type:MM_ANONPAGES val:22 [ 37.743667] ================================================================== [ 37.744355] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 37.745022] Read of size 8 at addr ffff888018c4ed08 by task sshd/220 [ 37.745574] [ 37.745725] CPU: 1 PID: 220 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 37.746343] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 37.747090] Call Trace: [ 37.747313] [ 37.747523] dump_stack_lvl+0x91/0xf0 [ 37.747997] print_report+0xcc/0x620 [ 37.748452] ? __virt_addr_valid+0x102/0x340 [ 37.748857] ? vma_interval_tree_remove+0xc75/0xec0 [ 37.749265] ? vma_interval_tree_remove+0xc75/0xec0 [ 37.749674] kasan_report+0xbe/0xf0 [ 37.750016] ? vma_interval_tree_remove+0xc75/0xec0 [ 37.750509] vma_interval_tree_remove+0xc75/0xec0 [ 37.750944] vma_prepare+0xc54/0x11a0 [ 37.751268] __split_vma+0x5af/0x950 [ 37.751611] ? __pfx___split_vma+0x10/0x10 [ 37.751956] ? find_held_lock+0x2c/0x110 [ 37.752308] do_vmi_align_munmap+0x2ba/0x11f0 [ 37.752726] ? lock_is_held_type+0x9f/0x120 [ 37.753087] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 37.753494] ? mtree_range_walk+0x632/0x900 [ 37.753858] ? mas_walk+0x5c7/0x7c0 [ 37.754167] do_vmi_munmap+0x1f1/0x2b0 [ 37.754569] mmap_region+0x1f9/0x2660 [ 37.754900] ? vm_mmap_pgoff+0x15c/0x3a0 [ 37.755253] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 37.755697] ? __pfx_lock_acquire+0x10/0x10 [ 37.756035] ? __pfx_mmap_region+0x10/0x10 [ 37.756382] ? security_mmap_addr+0x7d/0xa0 [ 37.756776] ? get_unmapped_area+0x1f5/0x3f0 [ 37.757127] do_mmap+0x854/0xf00 [ 37.757418] vm_mmap_pgoff+0x1a6/0x3a0 [ 37.757757] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 37.758109] ksys_mmap_pgoff+0x3af/0x500 [ 37.758466] do_syscall_64+0x3f/0x90 [ 37.758826] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 37.759261] RIP: 0033:0x7f3060b20d82 [ 37.759586] 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 [ 37.761025] RSP: 002b:00007fff9f3a60c8 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 37.761639] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f3060b20d82 [ 37.762201] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f305ff5a000 [ 37.762838] RBP: 00007f305ff5a000 R08: 0000000000000009 R09: 0000000000001000 [ 37.763386] R10: 0000000000000812 R11: 0000000000000206 R12: 000055d68f782f60 [ 37.763990] R13: 00007fff9f3a60e0 R14: 00007fff9f3a6110 R15: 00007fff9f3a6470 [ 37.764589] [ 37.764774] [ 37.764911] Allocated by task 213: [ 37.765190] kasan_save_stack+0x22/0x50 [ 37.765540] kasan_set_track+0x25/0x30 [ 37.765898] __kasan_slab_alloc+0x59/0x70 [ 37.766269] kmem_cache_alloc+0x16b/0x370 [ 37.766684] vm_area_dup+0x20/0x160 [ 37.766996] __split_vma+0x170/0x950 [ 37.767322] split_vma+0xc6/0x110 [ 37.767644] mprotect_fixup+0x8d2/0xb30 [ 37.768004] do_mprotect_pkey+0x87e/0xd40 [ 37.768407] __x64_sys_mprotect+0x78/0xc0 [ 37.768834] do_syscall_64+0x3f/0x90 [ 37.769168] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 37.769592] [ 37.769739] Freed by task 203: [ 37.770005] kasan_save_stack+0x22/0x50 [ 37.770339] kasan_set_track+0x25/0x30 [ 37.770744] kasan_save_free_info+0x2b/0x50 [ 37.771110] __kasan_slab_free+0x10a/0x190 [ 37.771445] kmem_cache_free+0x10d/0x4d0 [ 37.771818] rcu_core+0x8c8/0x2860 [ 37.772129] __do_softirq+0x1b7/0x7d4 [ 37.772455] [ 37.772611] Last potentially related work creation: [ 37.773030] kasan_save_stack+0x22/0x50 [ 37.773379] __kasan_record_aux_stack+0x8e/0xa0 [ 37.773808] __call_rcu_common.constprop.0+0x6a/0xb90 [ 37.774261] remove_vma+0x139/0x170 [ 37.774647] do_vmi_align_munmap+0xd4a/0x11f0 [ 37.775057] do_vmi_munmap+0x1f1/0x2b0 [ 37.775388] __vm_munmap+0x138/0x3a0 [ 37.775701] __x64_sys_munmap+0x59/0x80 [ 37.776045] do_syscall_64+0x3f/0x90 [ 37.776375] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 37.776860] [ 37.777012] The buggy address belongs to the object at ffff888018c4ecb0 [ 37.777012] which belongs to the cache vm_area_struct of size 168 [ 37.778047] The buggy address is located 88 bytes inside of [ 37.778047] freed 168-byte region [ffff888018c4ecb0, ffff888018c4ed58) [ 37.779082] [ 37.779233] The buggy address belongs to the physical page: [ 37.779713] page:00000000f918144a refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x18c4e [ 37.780446] memcg:ffff88800e48f001 [ 37.780739] flags: 0x100000000000200(slab|node=0|zone=1) [ 37.781182] page_type: 0xffffffff() [ 37.781500] raw: 0100000000000200 ffff88800879fc80 dead000000000122 0000000000000000 [ 37.782152] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800e48f001 [ 37.782849] page dumped because: kasan: bad access detected [ 37.783308] [ 37.783457] Memory state around the buggy address: [ 37.783889] ffff888018c4ec00: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 fc fc [ 37.784464] ffff888018c4ec80: fc fc fc fc fc fc fa fb fb fb fb fb fb fb fb fb [ 37.785102] >ffff888018c4ed00: fb fb fb fb fb fb fb fb fb fb fb fc fc fc fc fc [ 37.785655] ^ [ 37.785947] ffff888018c4ed80: fc fc fc fa fb fb fb fb fb fb fb fb fb fb fb fb [ 37.786579] ffff888018c4ee00: fb fb fb fb fb fb fb fb fc fc fc fc fc fc fc fc [ 37.787161] ================================================================== [ 37.787890] Disabling lock debugging due to kernel taint [ 39.812776] BUG: Bad rss-counter state mm:00000000ad5276e7 type:MM_FILEPAGES val:33 [ 39.813493] BUG: Bad rss-counter state mm:00000000ad5276e7 type:MM_ANONPAGES val:22 [ 40.198800] BUG: Bad rss-counter state mm:00000000ad5c95d7 type:MM_FILEPAGES val:33 [ 40.199536] BUG: Bad rss-counter state mm:00000000ad5c95d7 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:27881' (ECDSA) to the list of known hosts. 2023/06/20 08:40:47 fuzzer started 2023/06/20 08:40:47 dialing manager at localhost:44161 2023/06/20 08:40:47 checking machine... 2023/06/20 08:40:47 checking revisions... [ 40.788544] kmemleak: Automatic memory scanning thread ended 2023/06/20 08:40:47 testing simple program... [ 40.827356] cgroup: Unknown subsys name 'net' [ 40.887354] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 08:40:40 Registers: info registers vcpu 0 RAX=ffff8880140f7a00 RBX=ffff88806ce09ee8 RCX=1ffff1100281ef40 RDX=ffff8880140f7670 RSI=0000000000000008 RDI=ffff88806ce09ef8 RBP=0000000000000018 RSP=ffff88806ce09e50 R8 =0000000000000000 R9 =fffffbfff0ba77da R10=ffffffff85d3bed7 R11=0000000000000000 R12=dffffc0000000000 R13=ffff88806ce09ee8 R14=ffffffff8542a6c0 R15=ffff888016dd71b0 RIP=ffffffff8137fc89 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 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=00007f4bae8893c0 CR3=000000000d7e2000 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=7990849c59eab9b5ef4d2537cad5b34e XMM02=2c67c8bc2e329bc3000000000011cb48 XMM03=fb795ef6d65770560000000000123fe8 XMM04=51ac272d383e5a0000000000000ae988 XMM05=afb5a6661d595c5c0000000000134590 XMM06=c291bd5c70af25b900000000001339b8 XMM07=e042d86d42eb936e0000000000124268 XMM08=61fa2fb583df068e000000000011cba8 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=dffffc0000000000 RBX=0000000000000001 RCX=ffffffff810bd032 RDX=0000000000000bd0 RSI=0000000000000bd0 RDI=ffffffff864eab00 RBP=ffff888009e4f4b0 RSP=ffff888009e4f398 R8 =0000000000000000 R9 =ffff888009e4f498 R10=0000000000038001 R11=0000000000006097 R12=ffff888009e4f4b8 R13=ffff888009e4f4a0 R14=ffff888009e4f499 R15=ffff888009e4f458 RIP=ffffffff8113077a RFL=00000216 [----AP-] 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 00007ff75298d900 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=00007ffd00b26000 CR3=000000000953a000 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=6720646572637465733a4d41503d706f XMM01=652022746f6f72223d74636361207469 XMM02=3d6c616e696d72657420322e322e302e XMM03=3d656d616e74736f682022646873732f XMM04=40404040404040404040404040404040 XMM05=5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a XMM06=20202020202020202020202020202020 XMM07=00000000000000000000000000000000 XMM08=652075253d64692073253d706f000000 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000