syzkaller login: [ 31.496145] BUG: Bad rss-counter state mm:00000000d3188f51 type:MM_FILEPAGES val:33 [ 31.497412] BUG: Bad rss-counter state mm:00000000d3188f51 type:MM_ANONPAGES val:22 [ 31.536772] ================================================================== [ 31.537796] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 31.538823] Read of size 8 at addr ffff88800f8fab38 by task sshd/221 [ 31.539587] [ 31.539807] CPU: 0 PID: 221 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 31.540674] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 31.541656] Call Trace: [ 31.541981] [ 31.542277] dump_stack_lvl+0x91/0xf0 [ 31.542770] print_report+0xcc/0x620 [ 31.543265] ? __virt_addr_valid+0x102/0x340 [ 31.543830] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.544451] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.545067] kasan_report+0xbe/0xf0 [ 31.545553] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.546180] vma_interval_tree_remove+0xc75/0xec0 [ 31.546810] vma_prepare+0xc54/0x11a0 [ 31.547304] __split_vma+0x5af/0x950 [ 31.547777] ? __pfx___split_vma+0x10/0x10 [ 31.548303] ? find_held_lock+0x2c/0x110 [ 31.548819] do_vmi_align_munmap+0x2ba/0x11f0 [ 31.549382] ? lock_is_held_type+0x9f/0x120 [ 31.549929] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 31.550535] ? mtree_range_walk+0x632/0x900 [ 31.551085] ? mas_walk+0x5c7/0x7c0 [ 31.551563] do_vmi_munmap+0x1f1/0x2b0 [ 31.552057] mmap_region+0x1f9/0x2660 [ 31.552539] ? vm_mmap_pgoff+0x15c/0x3a0 [ 31.553052] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 31.553766] ? __pfx_lock_acquire+0x10/0x10 [ 31.554301] ? __pfx_mmap_region+0x10/0x10 [ 31.554831] ? security_mmap_addr+0x7d/0xa0 [ 31.555359] ? get_unmapped_area+0x1f5/0x3f0 [ 31.555907] do_mmap+0x854/0xf00 [ 31.556342] vm_mmap_pgoff+0x1a6/0x3a0 [ 31.556835] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 31.557397] ksys_mmap_pgoff+0x3af/0x500 [ 31.557906] do_syscall_64+0x3f/0x90 [ 31.558414] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.559062] RIP: 0033:0x7f635bcbad82 [ 31.559514] 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 [ 31.561624] RSP: 002b:00007ffd6b3a75a8 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 31.562537] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f635bcbad82 [ 31.563379] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f635b0f4000 [ 31.564231] RBP: 00007f635b0f4000 R08: 0000000000000009 R09: 0000000000001000 [ 31.565074] R10: 0000000000000812 R11: 0000000000000206 R12: 0000556d1577dec0 [ 31.565919] R13: 00007ffd6b3a75c0 R14: 00007ffd6b3a75f0 R15: 00007ffd6b3a7950 [ 31.566774] [ 31.567063] [ 31.567278] Allocated by task 214: [ 31.567707] kasan_save_stack+0x22/0x50 [ 31.568209] kasan_set_track+0x25/0x30 [ 31.568703] __kasan_slab_alloc+0x59/0x70 [ 31.569222] kmem_cache_alloc+0x16b/0x370 [ 31.569737] vm_area_dup+0x20/0x160 [ 31.570193] __split_vma+0x170/0x950 [ 31.570682] split_vma+0xc6/0x110 [ 31.571123] mprotect_fixup+0x8d2/0xb30 [ 31.571620] do_mprotect_pkey+0x87e/0xd40 [ 31.572142] __x64_sys_mprotect+0x78/0xc0 [ 31.572659] do_syscall_64+0x3f/0x90 [ 31.573132] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.573774] [ 31.573988] Freed by task 214: [ 31.574395] kasan_save_stack+0x22/0x50 [ 31.574901] kasan_set_track+0x25/0x30 [ 31.575392] kasan_save_free_info+0x2b/0x50 [ 31.575918] __kasan_slab_free+0x10a/0x190 [ 31.576444] kmem_cache_free+0x10d/0x4d0 [ 31.576947] rcu_core+0x8c8/0x2860 [ 31.577389] __do_softirq+0x1b7/0x7d4 [ 31.577863] [ 31.578078] Last potentially related work creation: [ 31.578670] kasan_save_stack+0x22/0x50 [ 31.579171] __kasan_record_aux_stack+0x8e/0xa0 [ 31.579741] __call_rcu_common.constprop.0+0x6a/0xb90 [ 31.580381] remove_vma+0x139/0x170 [ 31.580828] do_vmi_align_munmap+0xd4a/0x11f0 [ 31.581387] do_vmi_munmap+0x1f1/0x2b0 [ 31.581872] __vm_munmap+0x138/0x3a0 [ 31.582356] __x64_sys_munmap+0x59/0x80 [ 31.582849] do_syscall_64+0x3f/0x90 [ 31.583321] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.583963] [ 31.584175] The buggy address belongs to the object at ffff88800f8faae0 [ 31.584175] which belongs to the cache vm_area_struct of size 168 [ 31.585627] The buggy address is located 88 bytes inside of [ 31.585627] freed 168-byte region [ffff88800f8faae0, ffff88800f8fab88) [ 31.587033] [ 31.587251] The buggy address belongs to the physical page: [ 31.587902] page:00000000015ece64 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xf8fa [ 31.588977] memcg:ffff88800cb26d01 [ 31.589401] flags: 0x100000000000200(slab|node=0|zone=1) [ 31.590046] page_type: 0xffffffff() [ 31.590497] raw: 0100000000000200 ffff8880087a0c80 dead000000000122 0000000000000000 [ 31.591410] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800cb26d01 [ 31.592306] page dumped because: kasan: bad access detected [ 31.592964] [ 31.593175] Memory state around the buggy address: [ 31.593753] ffff88800f8faa00: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 31.594625] ffff88800f8faa80: 00 00 00 00 fc fc fc fc fc fc fc fc fa fb fb fb [ 31.595476] >ffff88800f8fab00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 31.596327] ^ [ 31.596937] ffff88800f8fab80: fb fc fc fc fc fc fc fc fc fa fb fb fb fb fb fb [ 31.597782] ffff88800f8fac00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fc fc [ 31.598637] ================================================================== [ 31.599691] Disabling lock debugging due to kernel taint [ 33.436517] BUG: Bad rss-counter state mm:00000000b85e1007 type:MM_FILEPAGES val:33 [ 33.437250] BUG: Bad rss-counter state mm:00000000b85e1007 type:MM_ANONPAGES val:22 [ 33.894927] BUG: Bad rss-counter state mm:00000000c1af3cb5 type:MM_FILEPAGES val:33 [ 33.896239] BUG: Bad rss-counter state mm:00000000c1af3cb5 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:26911' (ECDSA) to the list of known hosts. 2023/06/20 14:47:43 fuzzer started 2023/06/20 14:47:43 dialing manager at localhost:36067 2023/06/20 14:47:43 checking machine... 2023/06/20 14:47:43 checking revisions... [ 34.445447] kmemleak: Automatic memory scanning thread ended 2023/06/20 14:47:44 testing simple program... [ 34.493406] cgroup: Unknown subsys name 'net' [ 34.546482] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 14:47:43 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=0000000000000001 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=00007ffd8366b258 CR3=0000000005482000 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=00007f39ff1975100000564d1a502790 XMM02=6f6974707972636e6561737268746977 XMM03=00000000000000000000000000777074 XMM04=40404040404040404040404040404040 XMM05=5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a XMM06=20202020202020202020202020202020 XMM07=ffffffffffff00ffffff00ffffff00ff XMM08=00002000000000202020002020200000 XMM09=ffffffffffff00ffffff00ffffff00ff XMM10=00002000000000202020002020200000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=1ffff11001b69639 RBX=ffff88800db4b198 RCX=ffffffff812e0135 RDX=0000000000000000 RSI=0000000000000000 RDI=ffff88800db4b1c8 RBP=ffff88800e1a9800 RSP=ffff8880146bf568 R8 =0000000000000001 R9 =ffffed10028d7ea1 R10=0000000000000003 R11=0000000000040000 R12=dffffc0000000000 R13=ffff88800e195500 R14=ffffffff81803033 R15=ffff888016b6a000 RIP=ffffffff818464e2 RFL=00000046 [---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 00007f43b8a5d900 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=00007f13a3511650 CR3=000000000d864000 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=756f6a2f646d65747379732f6e75722f XMM01=00676f6c7379732f6c616e72756f6a2f XMM02=756f6a2f646d65747379732f6e75722f XMM03=006c616e72756f6a2f646d6574737973 XMM04=cea02018d54d25f200000000000ae988 XMM05=1b6de6c6097bdb0b0000000000133050 XMM06=c291bd5c70af25b90000000000131e40 XMM07=fb795ef6d657705600000000001220e0 XMM08=4f5453444600273d67736d000d0a0920 XMM09=00000000000000000000000000000000 XMM10=20200000000020202020202020200000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000