syzkaller login: [ 30.616330] BUG: Bad rss-counter state mm:000000005312f5ce type:MM_FILEPAGES val:33 [ 30.617534] BUG: Bad rss-counter state mm:000000005312f5ce type:MM_ANONPAGES val:22 [ 30.787842] ================================================================== [ 30.788897] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 30.789978] Read of size 8 at addr ffff88800e297140 by task sshd/221 [ 30.790987] [ 30.791238] CPU: 1 PID: 221 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 30.792074] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 30.793038] Call Trace: [ 30.793352] [ 30.793627] dump_stack_lvl+0x91/0xf0 [ 30.794099] print_report+0xcc/0x620 [ 30.794578] ? __virt_addr_valid+0x102/0x340 [ 30.795110] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.795710] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.796312] kasan_report+0xbe/0xf0 [ 30.796778] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.797396] vma_interval_tree_remove+0xc75/0xec0 [ 30.797983] vma_prepare+0xc54/0x11a0 [ 30.798450] __split_vma+0x5af/0x950 [ 30.798908] ? __pfx___split_vma+0x10/0x10 [ 30.799420] ? find_held_lock+0x2c/0x110 [ 30.799929] do_vmi_align_munmap+0x2ba/0x11f0 [ 30.800487] ? lock_is_held_type+0x9f/0x120 [ 30.801029] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 30.801618] ? mtree_range_walk+0x632/0x900 [ 30.802151] ? mas_walk+0x5c7/0x7c0 [ 30.802612] do_vmi_munmap+0x1f1/0x2b0 [ 30.803089] mmap_region+0x1f9/0x2660 [ 30.803556] ? vm_mmap_pgoff+0x15c/0x3a0 [ 30.804050] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 30.804753] ? __pfx_lock_acquire+0x10/0x10 [ 30.805276] ? __pfx_mmap_region+0x10/0x10 [ 30.805795] ? security_mmap_addr+0x7d/0xa0 [ 30.806315] ? get_unmapped_area+0x1f5/0x3f0 [ 30.806862] do_mmap+0x854/0xf00 [ 30.807288] vm_mmap_pgoff+0x1a6/0x3a0 [ 30.807769] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 30.808322] ksys_mmap_pgoff+0x3af/0x500 [ 30.808838] do_syscall_64+0x3f/0x90 [ 30.809316] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.809946] RIP: 0033:0x7fca1a9e8d82 [ 30.810392] 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 [ 30.812454] RSP: 002b:00007fff76d893e8 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 30.813354] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007fca1a9e8d82 [ 30.814185] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007fca19e22000 [ 30.815016] RBP: 00007fca19e22000 R08: 0000000000000009 R09: 0000000000001000 [ 30.815838] R10: 0000000000000812 R11: 0000000000000206 R12: 000055944aef4f70 [ 30.816675] R13: 00007fff76d89400 R14: 00007fff76d89430 R15: 00007fff76d89790 [ 30.817528] [ 30.817814] [ 30.818026] Allocated by task 214: [ 30.818447] kasan_save_stack+0x22/0x50 [ 30.818940] kasan_set_track+0x25/0x30 [ 30.819419] __kasan_slab_alloc+0x59/0x70 [ 30.819931] kmem_cache_alloc+0x16b/0x370 [ 30.820433] vm_area_dup+0x20/0x160 [ 30.820891] __split_vma+0x170/0x950 [ 30.821346] split_vma+0xc6/0x110 [ 30.821777] mprotect_fixup+0x8d2/0xb30 [ 30.822263] do_mprotect_pkey+0x87e/0xd40 [ 30.822772] __x64_sys_mprotect+0x78/0xc0 [ 30.823283] do_syscall_64+0x3f/0x90 [ 30.823744] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.824376] [ 30.824588] Freed by task 214: [ 30.824975] kasan_save_stack+0x22/0x50 [ 30.825464] kasan_set_track+0x25/0x30 [ 30.825947] kasan_save_free_info+0x2b/0x50 [ 30.826462] __kasan_slab_free+0x10a/0x190 [ 30.826979] kmem_cache_free+0x10d/0x4d0 [ 30.827479] rcu_core+0x8c8/0x2860 [ 30.827915] __do_softirq+0x1b7/0x7d4 [ 30.828388] [ 30.828601] Last potentially related work creation: [ 30.829184] kasan_save_stack+0x22/0x50 [ 30.829680] __kasan_record_aux_stack+0x8e/0xa0 [ 30.830239] __call_rcu_common.constprop.0+0x6a/0xb90 [ 30.830862] remove_vma+0x139/0x170 [ 30.831300] do_vmi_align_munmap+0xd4a/0x11f0 [ 30.831981] do_vmi_munmap+0x1f1/0x2b0 [ 30.832587] __vm_munmap+0x138/0x3a0 [ 30.833072] __x64_sys_munmap+0x59/0x80 [ 30.833563] do_syscall_64+0x3f/0x90 [ 30.834037] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.834680] [ 30.834900] The buggy address belongs to the object at ffff88800e2970e8 [ 30.834900] which belongs to the cache vm_area_struct of size 168 [ 30.836382] The buggy address is located 88 bytes inside of [ 30.836382] freed 168-byte region [ffff88800e2970e8, ffff88800e297190) [ 30.837805] [ 30.838020] The buggy address belongs to the physical page: [ 30.838684] page:0000000052de1636 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xe297 [ 30.839777] memcg:ffff88800f185301 [ 30.840199] flags: 0x100000000000200(slab|node=0|zone=1) [ 30.840852] page_type: 0xffffffff() [ 30.841308] raw: 0100000000000200 ffff88800879fc80 dead000000000122 0000000000000000 [ 30.842239] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800f185301 [ 30.843155] page dumped because: kasan: bad access detected [ 30.843815] [ 30.844033] Memory state around the buggy address: [ 30.844616] ffff88800e297000: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 30.845489] ffff88800e297080: 00 00 00 00 00 fc fc fc fc fc fc fc fc fa fb fb [ 30.846340] >ffff88800e297100: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 30.847176] ^ [ 30.847798] ffff88800e297180: fb fb fc fc fc fc fc fc fc fc fa fb fb fb fb fb [ 30.848631] ffff88800e297200: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fc [ 30.849473] ================================================================== [ 30.850371] Disabling lock debugging due to kernel taint [ 33.124239] BUG: Bad rss-counter state mm:00000000bfb47a4b type:MM_FILEPAGES val:33 [ 33.125348] BUG: Bad rss-counter state mm:00000000bfb47a4b type:MM_ANONPAGES val:22 [ 33.564088] BUG: Bad rss-counter state mm:00000000a86892f3 type:MM_FILEPAGES val:33 [ 33.564879] BUG: Bad rss-counter state mm:00000000a86892f3 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:48720' (ECDSA) to the list of known hosts. 2023/06/20 06:04:57 fuzzer started 2023/06/20 06:04:57 dialing manager at localhost:44161 2023/06/20 06:04:58 checking machine... 2023/06/20 06:04:58 checking revisions... [ 34.182264] kmemleak: Automatic memory scanning thread ended 2023/06/20 06:04:58 testing simple program... [ 34.229021] cgroup: Unknown subsys name 'net' [ 34.270774] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 06:04:57 Registers: info registers vcpu 0 RAX=ffff88806ce35000 RBX=0000000000000000 RCX=ffffffff8450c50e RDX=ffffed100d9c6a01 RSI=0000000000000004 RDI=ffffffff812889a5 RBP=dffffc0000000000 RSP=ffffffff85407e10 R8 =0000000000000000 R9 =ffffed100d9c6a00 R10=ffff88806ce35003 R11=ffff888008c58000 R12=ffffffff85d3bed0 R13=1ffffffff0a80fc7 R14=0000000000000000 R15=0000000000000000 RIP=ffffffff8450d49f 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=00007f9bf885c600 CR3=000000000dd04000 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=2037353a34303a3630203032206e754a XMM01=73732878696e755f6d6170203a5d3033 XMM02=65736f6c63206e6f6973736573203a29 XMM03=755f6d6170203a5d3033325b64687373 XMM04=69662068637573206f4e203a656c6163 XMM05=3a656c696620766e65206e65706f206f XMM06=65733a6468737328766e655f6d617020 XMM07=6b7a79732037353a34303a3630203032 XMM08=3d656e696c646d632022656369767265 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=0000000000000001 RBX=ffffffff85e075e8 RCX=ffffffff818ac121 RDX=0000000000000003 RSI=ffffffff861476e4 RDI=ffffffff85e075e4 RBP=ffffffff85e075e4 RSP=ffff8880166778d0 R8 =ffffffff861476e4 R9 =ffff8880166779c8 R10=0000000000038001 R11=0000000000023884 R12=ffffffff85e075f0 R13=ffffffff85e075e4 R14=ffffffff85e075e4 R15=dffffc0000000000 RIP=ffffffff8112fc73 RFL=00000213 [----A-C] 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 00007ff4a972d900 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=00005624609bd954 CR3=0000000015b90000 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