syzkaller login: [ 38.198460] BUG: Bad rss-counter state mm:00000000e10cc1a3 type:MM_FILEPAGES val:33 [ 38.199146] BUG: Bad rss-counter state mm:00000000e10cc1a3 type:MM_ANONPAGES val:22 [ 38.310304] ================================================================== [ 38.311016] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 38.311735] Read of size 8 at addr ffff88800f152058 by task sshd/220 [ 38.312323] [ 38.312493] CPU: 0 PID: 220 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 38.313153] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 38.313902] Call Trace: [ 38.314158] [ 38.314482] dump_stack_lvl+0x91/0xf0 [ 38.314864] print_report+0xcc/0x620 [ 38.315235] ? __virt_addr_valid+0x102/0x340 [ 38.315660] ? vma_interval_tree_remove+0xc75/0xec0 [ 38.316130] ? vma_interval_tree_remove+0xc75/0xec0 [ 38.316603] kasan_report+0xbe/0xf0 [ 38.316970] ? vma_interval_tree_remove+0xc75/0xec0 [ 38.317440] vma_interval_tree_remove+0xc75/0xec0 [ 38.317908] vma_prepare+0xc54/0x11a0 [ 38.318296] __split_vma+0x5af/0x950 [ 38.318659] ? __pfx___split_vma+0x10/0x10 [ 38.319062] ? find_held_lock+0x2c/0x110 [ 38.319399] do_vmi_align_munmap+0x2ba/0x11f0 [ 38.319768] ? lock_is_held_type+0x9f/0x120 [ 38.320117] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 38.320508] ? mtree_range_walk+0x632/0x900 [ 38.320861] ? mas_walk+0x5c7/0x7c0 [ 38.321165] do_vmi_munmap+0x1f1/0x2b0 [ 38.321490] mmap_region+0x1f9/0x2660 [ 38.321792] ? vm_mmap_pgoff+0x15c/0x3a0 [ 38.322132] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 38.322591] ? __pfx_lock_acquire+0x10/0x10 [ 38.322933] ? __pfx_mmap_region+0x10/0x10 [ 38.323272] ? security_mmap_addr+0x7d/0xa0 [ 38.323616] ? get_unmapped_area+0x1f5/0x3f0 [ 38.323978] do_mmap+0x854/0xf00 [ 38.324251] vm_mmap_pgoff+0x1a6/0x3a0 [ 38.324572] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 38.324936] ksys_mmap_pgoff+0x3af/0x500 [ 38.325271] do_syscall_64+0x3f/0x90 [ 38.325582] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 38.326020] RIP: 0033:0x7fbb7fdcfd82 [ 38.326314] 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 [ 38.327680] RSP: 002b:00007fff3324b848 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 38.328268] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007fbb7fdcfd82 [ 38.328816] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007fbb7f209000 [ 38.329371] RBP: 00007fbb7f209000 R08: 0000000000000009 R09: 0000000000001000 [ 38.329928] R10: 0000000000000812 R11: 0000000000000206 R12: 000055a05c762ec0 [ 38.330476] R13: 00007fff3324b860 R14: 00007fff3324b890 R15: 00007fff3324bbf0 [ 38.331035] [ 38.331217] [ 38.331358] Allocated by task 213: [ 38.331640] kasan_save_stack+0x22/0x50 [ 38.331955] kasan_set_track+0x25/0x30 [ 38.332261] __kasan_slab_alloc+0x59/0x70 [ 38.332599] kmem_cache_alloc+0x16b/0x370 [ 38.332937] vm_area_dup+0x20/0x160 [ 38.333235] __split_vma+0x170/0x950 [ 38.333531] split_vma+0xc6/0x110 [ 38.333806] mprotect_fixup+0x8d2/0xb30 [ 38.334130] do_mprotect_pkey+0x87e/0xd40 [ 38.334470] __x64_sys_mprotect+0x78/0xc0 [ 38.334807] do_syscall_64+0x3f/0x90 [ 38.335099] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 38.335518] [ 38.335650] Freed by task 213: [ 38.335901] kasan_save_stack+0x22/0x50 [ 38.336212] kasan_set_track+0x25/0x30 [ 38.336526] kasan_save_free_info+0x2b/0x50 [ 38.336877] __kasan_slab_free+0x10a/0x190 [ 38.337209] kmem_cache_free+0x10d/0x4d0 [ 38.337540] rcu_core+0x8c8/0x2860 [ 38.337831] __do_softirq+0x1b7/0x7d4 [ 38.338147] [ 38.338285] Last potentially related work creation: [ 38.338664] kasan_save_stack+0x22/0x50 [ 38.338987] __kasan_record_aux_stack+0x8e/0xa0 [ 38.339354] __call_rcu_common.constprop.0+0x6a/0xb90 [ 38.339771] remove_vma+0x139/0x170 [ 38.340053] do_vmi_align_munmap+0xd4a/0x11f0 [ 38.340415] do_vmi_munmap+0x1f1/0x2b0 [ 38.340728] __vm_munmap+0x138/0x3a0 [ 38.341025] __x64_sys_munmap+0x59/0x80 [ 38.341340] do_syscall_64+0x3f/0x90 [ 38.341643] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 38.342059] [ 38.342192] The buggy address belongs to the object at ffff88800f152000 [ 38.342192] which belongs to the cache vm_area_struct of size 168 [ 38.343083] The buggy address is located 88 bytes inside of [ 38.343083] freed 168-byte region [ffff88800f152000, ffff88800f1520a8) [ 38.343926] [ 38.344052] The buggy address belongs to the physical page: [ 38.344451] page:00000000d2ed626e refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xf152 [ 38.345093] memcg:ffff888016bc2801 [ 38.345352] flags: 0x100000000000200(slab|node=0|zone=1) [ 38.345742] page_type: 0xffffffff() [ 38.346018] raw: 0100000000000200 ffff88800879fc80 dead000000000100 dead000000000122 [ 38.346572] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff888016bc2801 [ 38.347130] page dumped because: kasan: bad access detected [ 38.347535] [ 38.347665] Memory state around the buggy address: [ 38.348015] ffff88800f151f00: fb fb fb fb fb fb fc fc fc fc fc fc fc fc fc fc [ 38.348533] ffff88800f151f80: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc [ 38.349052] >ffff88800f152000: fa fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 38.349569] ^ [ 38.350014] ffff88800f152080: fb fb fb fb fb fc fc fc fc fc fc fc fc 00 00 00 [ 38.350538] ffff88800f152100: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 38.351052] ================================================================== [ 38.351664] Disabling lock debugging due to kernel taint [ 40.383369] BUG: Bad rss-counter state mm:00000000c39d2c7c type:MM_FILEPAGES val:33 [ 40.384568] BUG: Bad rss-counter state mm:00000000c39d2c7c type:MM_ANONPAGES val:22 [ 40.764444] BUG: Bad rss-counter state mm:0000000071222e51 type:MM_FILEPAGES val:33 [ 40.765426] BUG: Bad rss-counter state mm:0000000071222e51 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:44253' (ECDSA) to the list of known hosts. 2023/06/19 11:18:22 fuzzer started 2023/06/19 11:18:22 dialing manager at localhost:44161 2023/06/19 11:18:22 checking machine... 2023/06/19 11:18:22 checking revisions... [ 41.547512] kmemleak: Automatic memory scanning thread ended 2023/06/19 11:18:22 testing simple program... [ 41.602309] cgroup: Unknown subsys name 'net' [ 41.656501] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 11:18:14 Registers: info registers vcpu 0 RAX=0000000000000003 RBX=0000000000000001 RCX=ffffffff864bb02e RDX=00000000000000a8 RSI=ffffffff85407d68 RDI=ffff88806ce09a98 RBP=ffff88806ce09af0 RSP=ffff88806ce09a28 R8 =ffffffff864bb032 R9 =ffff88806ce09ad8 R10=0000000000038001 R11=00000000000b6cb2 R12=ffff88806ce09af8 R13=ffff88806ce09ae0 R14=ffffffff85407d68 R15=ffff88806ce09a98 RIP=ffffffff81131375 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=00007f5d513dffe0 CR3=00000000198ce000 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=38313a3131203931206e754a3e36383c XMM01=7365733a646873732878696e755f6d61 XMM02=736f6c63206e6f6973736573203a296e XMM03=5f6d6170203a5d3033325b6468737320 XMM04=6456774875434142334f726f59427469 XMM05=485320415352203a3268737320303439 XMM06=206d6f726620746f6f7220726f662079 XMM07=00000000000000000000000000000000 XMM08=3a677562656420676f6c737973720000 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=1ffffffff0c26ee7 RBX=0000000000000001 RCX=ffffffff86137736 RDX=0000000000000000 RSI=dffffc0000000000 RDI=ffffffff86137738 RBP=ffff8880165d7350 RSP=ffff8880165d7288 R8 =ffffffff8613773a R9 =ffff8880165d7338 R10=0000000000038001 R11=0000000000020de7 R12=ffff8880165d7358 R13=ffff8880165d7340 R14=ffff8880165d7680 R15=ffff8880165d72f8 RIP=ffffffff811311c7 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 00007fcd5d724900 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=00007fcd5d6f3008 CR3=000000000e50e000 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=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