syzkaller login: [ 32.111849] BUG: Bad rss-counter state mm:00000000a31d6f6a type:MM_FILEPAGES val:33 [ 32.113075] BUG: Bad rss-counter state mm:00000000a31d6f6a type:MM_ANONPAGES val:22 [ 32.239334] ================================================================== [ 32.240271] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 32.241199] Read of size 8 at addr ffff88800ef5c6b0 by task sshd/220 [ 32.241956] [ 32.242176] CPU: 0 PID: 220 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 32.243142] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 32.244143] Call Trace: [ 32.244461] [ 32.244744] dump_stack_lvl+0x91/0xf0 [ 32.245233] print_report+0xcc/0x620 [ 32.245718] ? __virt_addr_valid+0x102/0x340 [ 32.246269] ? vma_interval_tree_remove+0xc75/0xec0 [ 32.246893] ? vma_interval_tree_remove+0xc75/0xec0 [ 32.247519] kasan_report+0xbe/0xf0 [ 32.247998] ? vma_interval_tree_remove+0xc75/0xec0 [ 32.248617] vma_interval_tree_remove+0xc75/0xec0 [ 32.249219] vma_prepare+0xc54/0x11a0 [ 32.249695] __split_vma+0x5af/0x950 [ 32.250170] ? __pfx___split_vma+0x10/0x10 [ 32.250696] ? find_held_lock+0x2c/0x110 [ 32.251213] do_vmi_align_munmap+0x2ba/0x11f0 [ 32.251795] ? lock_is_held_type+0x9f/0x120 [ 32.252341] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 32.252945] ? mtree_range_walk+0x632/0x900 [ 32.253495] ? mas_walk+0x5c7/0x7c0 [ 32.253980] do_vmi_munmap+0x1f1/0x2b0 [ 32.254475] mmap_region+0x1f9/0x2660 [ 32.254958] ? vm_mmap_pgoff+0x15c/0x3a0 [ 32.255486] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 32.256206] ? __pfx_lock_acquire+0x10/0x10 [ 32.256745] ? __pfx_mmap_region+0x10/0x10 [ 32.257275] ? security_mmap_addr+0x7d/0xa0 [ 32.257805] ? get_unmapped_area+0x1f5/0x3f0 [ 32.258362] do_mmap+0x854/0xf00 [ 32.258802] vm_mmap_pgoff+0x1a6/0x3a0 [ 32.259298] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 32.259874] ksys_mmap_pgoff+0x3af/0x500 [ 32.260384] do_syscall_64+0x3f/0x90 [ 32.260863] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 32.261504] RIP: 0033:0x7feba8a66d82 [ 32.261958] 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 [ 32.264099] RSP: 002b:00007ffcebb4d2a8 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 32.265003] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007feba8a66d82 [ 32.265857] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007feba7ea0000 [ 32.266702] RBP: 00007feba7ea0000 R08: 0000000000000009 R09: 0000000000001000 [ 32.267556] R10: 0000000000000812 R11: 0000000000000206 R12: 00005633564cdd90 [ 32.268404] R13: 00007ffcebb4d2c0 R14: 00007ffcebb4d2f0 R15: 00007ffcebb4d650 [ 32.269258] [ 32.269552] [ 32.269770] Allocated by task 213: [ 32.270196] kasan_save_stack+0x22/0x50 [ 32.270703] kasan_set_track+0x25/0x30 [ 32.271199] __kasan_slab_alloc+0x59/0x70 [ 32.271744] kmem_cache_alloc+0x16b/0x370 [ 32.272258] vm_area_dup+0x20/0x160 [ 32.272709] __split_vma+0x170/0x950 [ 32.273193] split_vma+0xc6/0x110 [ 32.273629] mprotect_fixup+0x8d2/0xb30 [ 32.274131] do_mprotect_pkey+0x87e/0xd40 [ 32.274664] __x64_sys_mprotect+0x78/0xc0 [ 32.275183] do_syscall_64+0x3f/0x90 [ 32.275663] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 32.276307] [ 32.276526] Freed by task 19: [ 32.276917] kasan_save_stack+0x22/0x50 [ 32.277419] kasan_set_track+0x25/0x30 [ 32.277916] kasan_save_free_info+0x2b/0x50 [ 32.278450] __kasan_slab_free+0x10a/0x190 [ 32.278985] kmem_cache_free+0x10d/0x4d0 [ 32.279509] rcu_core+0x8c8/0x2860 [ 32.279957] __do_softirq+0x1b7/0x7d4 [ 32.280439] [ 32.280657] Last potentially related work creation: [ 32.281243] kasan_save_stack+0x22/0x50 [ 32.281747] __kasan_record_aux_stack+0x8e/0xa0 [ 32.282319] __call_rcu_common.constprop.0+0x6a/0xb90 [ 32.282964] remove_vma+0x139/0x170 [ 32.283414] do_vmi_align_munmap+0xd4a/0x11f0 [ 32.283990] do_vmi_munmap+0x1f1/0x2b0 [ 32.284477] __vm_munmap+0x138/0x3a0 [ 32.284945] __x64_sys_munmap+0x59/0x80 [ 32.285437] do_syscall_64+0x3f/0x90 [ 32.285922] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 32.286563] [ 32.286780] The buggy address belongs to the object at ffff88800ef5c658 [ 32.286780] which belongs to the cache vm_area_struct of size 168 [ 32.288255] The buggy address is located 88 bytes inside of [ 32.288255] freed 168-byte region [ffff88800ef5c658, ffff88800ef5c700) [ 32.289656] [ 32.289882] The buggy address belongs to the physical page: [ 32.290544] page:00000000a337eb2c refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xef5c [ 32.291628] memcg:ffff888016727901 [ 32.292058] flags: 0x100000000000200(slab|node=0|zone=1) [ 32.292706] page_type: 0xffffffff() [ 32.293154] raw: 0100000000000200 ffff88800879fc80 dead000000000122 0000000000000000 [ 32.294068] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff888016727901 [ 32.294970] page dumped because: kasan: bad access detected [ 32.295642] [ 32.295861] Memory state around the buggy address: [ 32.296440] ffff88800ef5c580: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 32.297294] ffff88800ef5c600: 00 00 00 fc fc fc fc fc fc fc fc fa fb fb fb fb [ 32.298150] >ffff88800ef5c680: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 32.299012] ^ [ 32.299598] ffff88800ef5c700: fc fc fc fc fc fc fc fc fa fb fb fb fb fb fb fb [ 32.300446] ffff88800ef5c780: fb fb fb fb fb fb fb fb fb fb fb fb fb fc fc fc [ 32.301293] ================================================================== [ 32.302354] Disabling lock debugging due to kernel taint [ 33.793173] BUG: Bad rss-counter state mm:000000005f00ccdd type:MM_FILEPAGES val:33 [ 33.794418] BUG: Bad rss-counter state mm:000000005f00ccdd type:MM_ANONPAGES val:22 [ 34.184785] BUG: Bad rss-counter state mm:00000000ab702f64 type:MM_FILEPAGES val:33 [ 34.185514] BUG: Bad rss-counter state mm:00000000ab702f64 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:58944' (ECDSA) to the list of known hosts. 2023/06/19 15:11:00 fuzzer started 2023/06/19 15:11:01 dialing manager at localhost:44161 2023/06/19 15:11:01 checking machine... 2023/06/19 15:11:01 checking revisions... [ 34.947904] kmemleak: Automatic memory scanning thread ended 2023/06/19 15:11:01 testing simple program... [ 34.992103] cgroup: Unknown subsys name 'net' [ 35.045256] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 15:10:59 Registers: info registers vcpu 0 RAX=dffffc0000000000 RBX=0000000000000001 RCX=0000000000000002 RDX=ffffffff87b86c40 RSI=ffffffff848ff060 RDI=ffff88800f17be40 RBP=ffffffff848ff060 RSP=ffff88800fccfa58 R8 =ffff88800fccfa30 R9 =fffffbfff0ba77da R10=ffffffff85d3bed7 R11=00000000000b6996 R12=ffffffff87b86c40 R13=0000000000000002 R14=ffff88800f17be88 R15=ffff88800f17be40 RIP=ffffffff812dfb82 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 00007fde736d2900 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=00007fff4466c000 CR3=0000000016ff4000 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=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 info registers vcpu 1 RAX=ffff88806cf35000 RBX=0000000000000001 RCX=ffffffff8450c50e RDX=ffffed100d9e6a01 RSI=0000000000000004 RDI=ffffffff812889a5 RBP=dffffc0000000000 RSP=ffff888008e27e70 R8 =0000000000000000 R9 =ffffed100d9e6a00 R10=ffff88806cf35003 R11=0000000000000001 R12=ffffffff85d3bed0 R13=1ffff110011c4fd3 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 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=00007ff6255ca390 CR3=0000000009872000 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=cd482da116f0ebb22842bfb31f3e47ce XMM02=000000000011c518ec2efd57dc4c00df XMM03=0000000000123dc0b6aeb87d1e2d892c XMM04=d56831598b873bca00000000000ae988 XMM05=19e9129bd510f23500000000001338b0 XMM06=215193c92aec88c50000000000132718 XMM07=e042d86d42eb936e0000000000124040 XMM08=b6aeb87d1e2d892c000000000011c578 XMM09=00000000000000000000000000000000 XMM10=20200000000020202020202020200000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000