syzkaller login: [ 34.393111] BUG: Bad rss-counter state mm:000000006551a061 type:MM_FILEPAGES val:33 [ 34.394228] BUG: Bad rss-counter state mm:000000006551a061 type:MM_ANONPAGES val:22 [ 34.570267] ================================================================== [ 34.571254] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 34.572283] Read of size 8 at addr ffff88800e5bf5c8 by task sshd/220 [ 34.573217] [ 34.573461] CPU: 0 PID: 220 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 34.574434] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 34.575517] Call Trace: [ 34.575863] [ 34.576169] dump_stack_lvl+0x91/0xf0 [ 34.576715] print_report+0xcc/0x620 [ 34.577249] ? __virt_addr_valid+0x102/0x340 [ 34.577877] ? vma_interval_tree_remove+0xc75/0xec0 [ 34.578560] ? vma_interval_tree_remove+0xc75/0xec0 [ 34.579225] kasan_report+0xbe/0xf0 [ 34.579756] ? vma_interval_tree_remove+0xc75/0xec0 [ 34.580432] vma_interval_tree_remove+0xc75/0xec0 [ 34.581110] vma_prepare+0xc54/0x11a0 [ 34.581682] __split_vma+0x5af/0x950 [ 34.582194] ? __pfx___split_vma+0x10/0x10 [ 34.582768] ? find_held_lock+0x2c/0x110 [ 34.583324] do_vmi_align_munmap+0x2ba/0x11f0 [ 34.583945] ? lock_is_held_type+0x9f/0x120 [ 34.584532] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 34.585201] ? mtree_range_walk+0x632/0x900 [ 34.585822] ? mas_walk+0x5c7/0x7c0 [ 34.586331] do_vmi_munmap+0x1f1/0x2b0 [ 34.586882] mmap_region+0x1f9/0x2660 [ 34.587406] ? vm_mmap_pgoff+0x15c/0x3a0 [ 34.587967] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 34.588741] ? __pfx_lock_acquire+0x10/0x10 [ 34.589321] ? __pfx_mmap_region+0x10/0x10 [ 34.589917] ? security_mmap_addr+0x7d/0xa0 [ 34.590491] ? get_unmapped_area+0x1f5/0x3f0 [ 34.591077] do_mmap+0x854/0xf00 [ 34.591559] vm_mmap_pgoff+0x1a6/0x3a0 [ 34.592088] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 34.592701] ksys_mmap_pgoff+0x3af/0x500 [ 34.593279] do_syscall_64+0x3f/0x90 [ 34.593817] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 34.594520] RIP: 0033:0x7f90ccb95d82 [ 34.595009] 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 [ 34.597311] RSP: 002b:00007ffdafbe9e98 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 34.598307] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f90ccb95d82 [ 34.599242] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f90cbfcf000 [ 34.600207] RBP: 00007f90cbfcf000 R08: 0000000000000009 R09: 0000000000001000 [ 34.601186] R10: 0000000000000812 R11: 0000000000000206 R12: 000055ee18bfaec0 [ 34.602196] R13: 00007ffdafbe9eb0 R14: 00007ffdafbe9ee0 R15: 00007ffdafbea240 [ 34.603171] [ 34.603523] [ 34.603769] Allocated by task 213: [ 34.604249] kasan_save_stack+0x22/0x50 [ 34.604835] kasan_set_track+0x25/0x30 [ 34.605394] __kasan_slab_alloc+0x59/0x70 [ 34.605991] kmem_cache_alloc+0x16b/0x370 [ 34.606596] vm_area_dup+0x20/0x160 [ 34.607111] __split_vma+0x170/0x950 [ 34.607664] split_vma+0xc6/0x110 [ 34.608170] mprotect_fixup+0x8d2/0xb30 [ 34.608751] do_mprotect_pkey+0x87e/0xd40 [ 34.609334] __x64_sys_mprotect+0x78/0xc0 [ 34.609941] do_syscall_64+0x3f/0x90 [ 34.610477] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 34.611202] [ 34.611450] Freed by task 213: [ 34.611900] kasan_save_stack+0x22/0x50 [ 34.612473] kasan_set_track+0x25/0x30 [ 34.613035] kasan_save_free_info+0x2b/0x50 [ 34.613668] __kasan_slab_free+0x10a/0x190 [ 34.614264] kmem_cache_free+0x10d/0x4d0 [ 34.614853] rcu_core+0x8c8/0x2860 [ 34.615355] __do_softirq+0x1b7/0x7d4 [ 34.615920] [ 34.616164] Last potentially related work creation: [ 34.616881] kasan_save_stack+0x22/0x50 [ 34.617616] __kasan_record_aux_stack+0x8e/0xa0 [ 34.618432] __call_rcu_common.constprop.0+0x6a/0xb90 [ 34.619386] remove_vma+0x139/0x170 [ 34.620025] do_vmi_align_munmap+0xd4a/0x11f0 [ 34.620677] do_vmi_munmap+0x1f1/0x2b0 [ 34.621256] __vm_munmap+0x138/0x3a0 [ 34.621812] __x64_sys_munmap+0x59/0x80 [ 34.622365] do_syscall_64+0x3f/0x90 [ 34.622903] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 34.623647] [ 34.623891] The buggy address belongs to the object at ffff88800e5bf570 [ 34.623891] which belongs to the cache vm_area_struct of size 168 [ 34.625541] The buggy address is located 88 bytes inside of [ 34.625541] freed 168-byte region [ffff88800e5bf570, ffff88800e5bf618) [ 34.627063] [ 34.627295] The buggy address belongs to the physical page: [ 34.628005] page:00000000041e3a17 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xe5bf [ 34.629179] memcg:ffff888015c1d901 [ 34.629688] flags: 0x100000000000200(slab|node=0|zone=1) [ 34.630377] page_type: 0xffffffff() [ 34.630872] raw: 0100000000000200 ffff88800879fc80 dead000000000122 0000000000000000 [ 34.631862] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff888015c1d901 [ 34.632835] page dumped because: kasan: bad access detected [ 34.633581] [ 34.633813] Memory state around the buggy address: [ 34.634442] ffff88800e5bf480: fc 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 34.635367] ffff88800e5bf500: 00 00 00 00 00 00 fc fc fc fc fc fc fc fc fa fb [ 34.636281] >ffff88800e5bf580: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 34.637212] ^ [ 34.637932] ffff88800e5bf600: fb fb fb fc fc fc fc fc fc fc fc fa fb fb fb fb [ 34.638876] ffff88800e5bf680: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 34.639797] ================================================================== [ 34.640954] Disabling lock debugging due to kernel taint [ 36.804065] BUG: Bad rss-counter state mm:00000000084d9643 type:MM_FILEPAGES val:33 [ 36.805273] BUG: Bad rss-counter state mm:00000000084d9643 type:MM_ANONPAGES val:22 [ 37.361532] BUG: Bad rss-counter state mm:00000000cfb07238 type:MM_FILEPAGES val:33 [ 37.362678] BUG: Bad rss-counter state mm:00000000cfb07238 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:20139' (ECDSA) to the list of known hosts. 2023/06/19 19:37:51 fuzzer started 2023/06/19 19:37:52 dialing manager at localhost:44161 2023/06/19 19:37:52 checking machine... 2023/06/19 19:37:52 checking revisions... [ 38.030430] kmemleak: Automatic memory scanning thread ended 2023/06/19 19:37:52 testing simple program... [ 38.080581] cgroup: Unknown subsys name 'net' [ 38.123134] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 19:37:47 Registers: info registers vcpu 0 RAX=0000000080000000 RBX=0000000000000001 RCX=0000000080000000 RDX=0000000000000007 RSI=ffffffff81efd8da RDI=0000000000000001 RBP=0000000000000001 RSP=ffff88801652fb98 R8 =0000000000000000 R9 =ffff88801652fc20 R10=0000000000000000 R11=0000000000000000 R12=0000000000000010 R13=0000000000000007 R14=0000000000000059 R15=ffff88801652fc20 RIP=ffffffff814c07f1 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 00007f7ed0436900 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=00007f7ed09ee0b0 CR3=000000000ca54000 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=2c2c2c2c2c2c2c2c2c2c2c2c2c2c2c2c XMM01=00000000000000000000000000ff0000 XMM02=00000000000000000000000000ff0000 XMM03=5320444f4854454d5f54505952434e45 XMM04=40404040404040404040404040404040 XMM05=5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a XMM06=20202020202020202020202020202020 XMM07=00000000000000000000000000000000 XMM08=6c6f636f746f72702f6374652f006563 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=0000000000000001 RBX=ffff888013eda080 RCX=0000000000000100 RDX=ffff888008d751c0 RSI=ffffffff811431c2 RDI=0000000000000007 RBP=0000000013eda080 RSP=ffff88806cf09d88 R8 =0000000000000007 R9 =0000000000000000 R10=0000000000000008 R11=0000000000000000 R12=0000000000000001 R13=0000000000000008 R14=0000000000000002 R15=ffff88801a371000 RIP=ffffffff811431c6 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 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=00007fa2ee390000 CR3=000000001024c000 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=355e5c8f29f8de8fc1481cc7ff0ce8f9 XMM02=2c67c8bc2e329bc3000000000011f6f0 XMM03=fb795ef6d65770560000000000123e90 XMM04=71680f953a7b957600000000000ae988 XMM05=19e9129bd510f2350000000000133a28 XMM06=431c75b180bd06b00000000000132890 XMM07=e042d86d42eb936e0000000000124110 XMM08=63ad8033ede0985e000000000011f750 XMM09=00000000000000000000000000000000 XMM10=20200000000020202020202020200000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000