syzkaller login: [ 38.240969] BUG: Bad rss-counter state mm:00000000bc1c31bb type:MM_FILEPAGES val:32 [ 38.242247] BUG: Bad rss-counter state mm:00000000bc1c31bb type:MM_ANONPAGES val:22 [ 38.386578] ================================================================== [ 38.387472] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 38.388415] Read of size 8 at addr ffff888016d173f8 by task sshd/220 [ 38.389182] [ 38.389398] CPU: 0 PID: 220 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 38.390332] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 38.391296] Call Trace: [ 38.391616] [ 38.391895] dump_stack_lvl+0x91/0xf0 [ 38.392418] print_report+0xcc/0x620 [ 38.392904] ? __virt_addr_valid+0x102/0x340 [ 38.393460] ? vma_interval_tree_remove+0xc75/0xec0 [ 38.394078] ? vma_interval_tree_remove+0xc75/0xec0 [ 38.394692] kasan_report+0xbe/0xf0 [ 38.395161] ? vma_interval_tree_remove+0xc75/0xec0 [ 38.395786] vma_interval_tree_remove+0xc75/0xec0 [ 38.396396] vma_prepare+0xc54/0x11a0 [ 38.396880] __split_vma+0x5af/0x950 [ 38.397351] ? __pfx___split_vma+0x10/0x10 [ 38.397889] ? find_held_lock+0x2c/0x110 [ 38.398425] do_vmi_align_munmap+0x2ba/0x11f0 [ 38.398989] ? lock_is_held_type+0x9f/0x120 [ 38.399532] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 38.400155] ? mtree_range_walk+0x632/0x900 [ 38.400705] ? mas_walk+0x5c7/0x7c0 [ 38.401193] do_vmi_munmap+0x1f1/0x2b0 [ 38.401694] mmap_region+0x1f9/0x2660 [ 38.402187] ? vm_mmap_pgoff+0x15c/0x3a0 [ 38.402696] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 38.403411] ? __pfx_lock_acquire+0x10/0x10 [ 38.403954] ? __pfx_mmap_region+0x10/0x10 [ 38.404503] ? security_mmap_addr+0x7d/0xa0 [ 38.405050] ? get_unmapped_area+0x1f5/0x3f0 [ 38.405600] do_mmap+0x854/0xf00 [ 38.406038] vm_mmap_pgoff+0x1a6/0x3a0 [ 38.406530] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 38.407088] ksys_mmap_pgoff+0x3af/0x500 [ 38.407605] do_syscall_64+0x3f/0x90 [ 38.408098] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 38.408742] RIP: 0033:0x7f766382ad82 [ 38.409195] 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 [ 38.411297] RSP: 002b:00007ffd6c15c898 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 38.412202] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f766382ad82 [ 38.413036] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f7662c64000 [ 38.413872] RBP: 00007f7662c64000 R08: 0000000000000009 R09: 0000000000001000 [ 38.414710] R10: 0000000000000812 R11: 0000000000000206 R12: 000055e865e46ec0 [ 38.415551] R13: 00007ffd6c15c8b0 R14: 00007ffd6c15c8e0 R15: 00007ffd6c15cc40 [ 38.416438] [ 38.416730] [ 38.416942] Allocated by task 213: [ 38.417363] kasan_save_stack+0x22/0x50 [ 38.417867] kasan_set_track+0x25/0x30 [ 38.418361] __kasan_slab_alloc+0x59/0x70 [ 38.418877] kmem_cache_alloc+0x16b/0x370 [ 38.419394] vm_area_dup+0x20/0x160 [ 38.419844] __split_vma+0x170/0x950 [ 38.420322] split_vma+0xc6/0x110 [ 38.420762] mprotect_fixup+0x8d2/0xb30 [ 38.421261] do_mprotect_pkey+0x87e/0xd40 [ 38.421777] __x64_sys_mprotect+0x78/0xc0 [ 38.422290] do_syscall_64+0x3f/0x90 [ 38.422758] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 38.423397] [ 38.423611] Freed by task 213: [ 38.424003] kasan_save_stack+0x22/0x50 [ 38.424512] kasan_set_track+0x25/0x30 [ 38.425000] kasan_save_free_info+0x2b/0x50 [ 38.425528] __kasan_slab_free+0x10a/0x190 [ 38.426062] kmem_cache_free+0x10d/0x4d0 [ 38.426561] rcu_core+0x8c8/0x2860 [ 38.427006] __do_softirq+0x1b7/0x7d4 [ 38.427479] [ 38.427691] Last potentially related work creation: [ 38.428292] kasan_save_stack+0x22/0x50 [ 38.428796] __kasan_record_aux_stack+0x8e/0xa0 [ 38.429370] __call_rcu_common.constprop.0+0x6a/0xb90 [ 38.430004] remove_vma+0x139/0x170 [ 38.430456] do_vmi_align_munmap+0xd4a/0x11f0 [ 38.431010] do_vmi_munmap+0x1f1/0x2b0 [ 38.431494] __vm_munmap+0x138/0x3a0 [ 38.431952] __x64_sys_munmap+0x59/0x80 [ 38.432452] do_syscall_64+0x3f/0x90 [ 38.432922] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 38.433563] [ 38.433775] The buggy address belongs to the object at ffff888016d173a0 [ 38.433775] which belongs to the cache vm_area_struct of size 168 [ 38.435236] The buggy address is located 88 bytes inside of [ 38.435236] freed 168-byte region [ffff888016d173a0, ffff888016d17448) [ 38.436625] [ 38.436844] The buggy address belongs to the physical page: [ 38.437493] page:000000009e5122d9 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x16d17 [ 38.438580] memcg:ffff88800cc3ee01 [ 38.439006] anon flags: 0x100000000000200(slab|node=0|zone=1) [ 38.439700] page_type: 0xffffffff() [ 38.440175] raw: 0100000000000200 ffff88800879fc80 ffffea0000597540 0000000000000003 [ 38.441082] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800cc3ee01 [ 38.441979] page dumped because: kasan: bad access detected [ 38.442632] [ 38.442844] Memory state around the buggy address: [ 38.443428] ffff888016d17280: fc fc fc fc fc fc fc fa fb fb fb fb fb fb fb fb [ 38.444281] ffff888016d17300: fb fb fb fb fb fb fb fb fb fb fb fb fc fc fc fc [ 38.445128] >ffff888016d17380: fc fc fc fc fa fb fb fb fb fb fb fb fb fb fb fb [ 38.445970] ^ [ 38.446813] ffff888016d17400: fb fb fb fb fb fb fb fb fb fc fc fc fc fc fc fc [ 38.447664] ffff888016d17480: fc 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 38.448529] ================================================================== [ 38.449613] Disabling lock debugging due to kernel taint [ 40.500099] BUG: Bad rss-counter state mm:0000000099b504df type:MM_FILEPAGES val:33 [ 40.501112] BUG: Bad rss-counter state mm:0000000099b504df type:MM_ANONPAGES val:22 [ 41.089439] BUG: Bad rss-counter state mm:000000002f217f2f type:MM_FILEPAGES val:33 [ 41.090812] BUG: Bad rss-counter state mm:000000002f217f2f type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:15594' (ECDSA) to the list of known hosts. 2023/06/20 06:16:17 fuzzer started 2023/06/20 06:16:18 dialing manager at localhost:44161 2023/06/20 06:16:18 checking machine... 2023/06/20 06:16:18 checking revisions... [ 41.745987] kmemleak: Automatic memory scanning thread ended 2023/06/20 06:16:18 testing simple program... [ 41.804458] cgroup: Unknown subsys name 'net' [ 41.855819] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 06:16:10 Registers: info registers vcpu 0 RAX=0000000000000000 RBX=ffffffff85d8840c RCX=ffffffff810bd032 RDX=0000000000000000 RSI=ffffffff86088c1a RDI=ffffffff85d88408 RBP=ffffffff85d88408 RSP=ffff88806ce09948 R8 =ffffffff86088c1a R9 =ffff88806ce09a90 R10=0000000000038001 R11=0000000000003c0d R12=ffffffff85d88408 R13=ffffffff85d88408 R14=ffffffff85d88408 R15=dffffc0000000000 RIP=ffffffff8112fc5d 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 00007f06bafa9900 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=00007f06ba42a750 CR3=000000000cd28000 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=ffffffffffffffffffffffffffffffff XMM01=30306234386136303638616663356134 XMM02=38303062343861363036386166633561 XMM03=2f6c616e72756f6a2f676f6c2f6e7572 XMM04=71126b458d0d3a8800000000000ae988 XMM05=f13734349a6f79a100000000001355d8 XMM06=7666730fe725a2c30000000000134378 XMM07=00000000000000000000000000000000 XMM08=415453454d49545f454d49544c414552 XMM09=00000000000000000000000000000000 XMM10=20200000000020202020202020200000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=ffffffff836382d7 RBX=ffffffff813ad420 RCX=0000000000000001 RDX=1ffff11001e04ef6 RSI=ffffffff836382d7 RDI=ffff88800f027820 RBP=ffff88800f0277f0 RSP=ffff88800f027750 R8 =0000000000000001 R9 =ffff88800f027798 R10=0000000000038001 R11=0000000000091aff R12=ffff88800f027820 R13=0000000000000000 R14=ffff88800b833680 R15=0000000000000000 RIP=ffffffff84532440 RFL=00000286 [--S--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 00007f6badfa1900 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=00007ffc5b2dd000 CR3=000000000f2ce000 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=635f6e6f69737365733a4d41503d706f XMM01=6f6c5f6d61702c78756e696c65735f6d XMM02=61702c74696d7265705f6d61702c7469 XMM03=655f6d61702c7374696d696c5f6d6170 XMM04=3d6c616e696d72657420322e322e302e XMM05=3d656d616e74736f682022646873732f XMM06=746f6f72223d746363612078756e696c XMM07=6e655f6d61702c7374696d696c5f6d61 XMM08=652075253d64692073253d706f000000 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000