syzkaller login: [ 32.072550] BUG: Bad rss-counter state mm:00000000bab5240d type:MM_FILEPAGES val:33 [ 32.074106] BUG: Bad rss-counter state mm:00000000bab5240d type:MM_ANONPAGES val:22 [ 32.247556] ================================================================== [ 32.248680] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 32.249664] Read of size 8 at addr ffff888016d6fc20 by task sshd/220 [ 32.250589] [ 32.250822] CPU: 0 PID: 220 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 32.251740] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 32.252787] Call Trace: [ 32.253123] [ 32.253425] dump_stack_lvl+0x91/0xf0 [ 32.253944] print_report+0xcc/0x620 [ 32.254460] ? __virt_addr_valid+0x102/0x340 [ 32.255042] ? vma_interval_tree_remove+0xc75/0xec0 [ 32.255700] ? vma_interval_tree_remove+0xc75/0xec0 [ 32.256356] kasan_report+0xbe/0xf0 [ 32.256884] ? vma_interval_tree_remove+0xc75/0xec0 [ 32.257547] vma_interval_tree_remove+0xc75/0xec0 [ 32.258189] vma_prepare+0xc54/0x11a0 [ 32.258694] __split_vma+0x5af/0x950 [ 32.259200] ? __pfx___split_vma+0x10/0x10 [ 32.259762] ? find_held_lock+0x2c/0x110 [ 32.260314] do_vmi_align_munmap+0x2ba/0x11f0 [ 32.260925] ? lock_is_held_type+0x9f/0x120 [ 32.261495] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 32.262140] ? mtree_range_walk+0x632/0x900 [ 32.262729] ? mas_walk+0x5c7/0x7c0 [ 32.263231] do_vmi_munmap+0x1f1/0x2b0 [ 32.263761] mmap_region+0x1f9/0x2660 [ 32.264267] ? vm_mmap_pgoff+0x15c/0x3a0 [ 32.264823] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 32.265576] ? __pfx_lock_acquire+0x10/0x10 [ 32.266137] ? __pfx_mmap_region+0x10/0x10 [ 32.266704] ? security_mmap_addr+0x7d/0xa0 [ 32.267263] ? get_unmapped_area+0x1f5/0x3f0 [ 32.267846] do_mmap+0x854/0xf00 [ 32.268309] vm_mmap_pgoff+0x1a6/0x3a0 [ 32.268853] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 32.269446] ksys_mmap_pgoff+0x3af/0x500 [ 32.269980] do_syscall_64+0x3f/0x90 [ 32.270483] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 32.271163] RIP: 0033:0x7f2fda5c7d82 [ 32.271646] 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 [ 32.273913] RSP: 002b:00007ffc6dc46d38 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 32.274876] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f2fda5c7d82 [ 32.275766] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f2fd9a01000 [ 32.276674] RBP: 00007f2fd9a01000 R08: 0000000000000009 R09: 0000000000001000 [ 32.277566] R10: 0000000000000812 R11: 0000000000000206 R12: 000055743161cec0 [ 32.278462] R13: 00007ffc6dc46d50 R14: 00007ffc6dc46d80 R15: 00007ffc6dc470e0 [ 32.279365] [ 32.279673] [ 32.279904] Allocated by task 213: [ 32.280360] kasan_save_stack+0x22/0x50 [ 32.280915] kasan_set_track+0x25/0x30 [ 32.281438] __kasan_slab_alloc+0x59/0x70 [ 32.282022] kmem_cache_alloc+0x16b/0x370 [ 32.282587] vm_area_dup+0x20/0x160 [ 32.283090] __split_vma+0x170/0x950 [ 32.283604] split_vma+0xc6/0x110 [ 32.284094] mprotect_fixup+0x8d2/0xb30 [ 32.284665] do_mprotect_pkey+0x87e/0xd40 [ 32.285238] __x64_sys_mprotect+0x78/0xc0 [ 32.285799] do_syscall_64+0x3f/0x90 [ 32.286299] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 32.286983] [ 32.287213] Freed by task 213: [ 32.287629] kasan_save_stack+0x22/0x50 [ 32.288165] kasan_set_track+0x25/0x30 [ 32.288699] kasan_save_free_info+0x2b/0x50 [ 32.289261] __kasan_slab_free+0x10a/0x190 [ 32.289824] kmem_cache_free+0x10d/0x4d0 [ 32.290362] rcu_core+0x8c8/0x2860 [ 32.290831] __do_softirq+0x1b7/0x7d4 [ 32.291334] [ 32.291563] Last potentially related work creation: [ 32.292182] kasan_save_stack+0x22/0x50 [ 32.292740] __kasan_record_aux_stack+0x8e/0xa0 [ 32.293370] __call_rcu_common.constprop.0+0x6a/0xb90 [ 32.294075] remove_vma+0x139/0x170 [ 32.294575] do_vmi_align_munmap+0xd4a/0x11f0 [ 32.295188] do_vmi_munmap+0x1f1/0x2b0 [ 32.295724] __vm_munmap+0x138/0x3a0 [ 32.296235] __x64_sys_munmap+0x59/0x80 [ 32.296791] do_syscall_64+0x3f/0x90 [ 32.297311] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 32.298018] [ 32.298255] The buggy address belongs to the object at ffff888016d6fbc8 [ 32.298255] which belongs to the cache vm_area_struct of size 168 [ 32.299868] The buggy address is located 88 bytes inside of [ 32.299868] freed 168-byte region [ffff888016d6fbc8, ffff888016d6fc70) [ 32.301431] [ 32.301668] The buggy address belongs to the physical page: [ 32.302380] page:0000000064ebb00c refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x16d6f [ 32.303588] memcg:ffff8880169f2001 [ 32.304055] flags: 0x100000000000200(slab|node=0|zone=1) [ 32.304770] page_type: 0xffffffff() [ 32.305265] raw: 0100000000000200 ffff88800879fc80 dead000000000122 0000000000000000 [ 32.306276] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff8880169f2001 [ 32.307276] page dumped because: kasan: bad access detected [ 32.308001] [ 32.308233] Memory state around the buggy address: [ 32.308874] ffff888016d6fb00: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 32.309815] ffff888016d6fb80: 00 fc fc fc fc fc fc fc fc fa fb fb fb fb fb fb [ 32.310756] >ffff888016d6fc00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fc fc [ 32.311695] ^ [ 32.312275] ffff888016d6fc80: fc fc fc fc fc fc fa fb fb fb fb fb fb fb fb fb [ 32.313221] ffff888016d6fd00: fb fb fb fb fb fb fb fb fb fb fb fc fc fc fc fc [ 32.314156] ================================================================== [ 32.315277] Disabling lock debugging due to kernel taint [ 34.247993] BUG: Bad rss-counter state mm:00000000a66be4e7 type:MM_FILEPAGES val:33 [ 34.249011] BUG: Bad rss-counter state mm:00000000a66be4e7 type:MM_ANONPAGES val:22 [ 34.710664] BUG: Bad rss-counter state mm:000000002e29fd71 type:MM_FILEPAGES val:33 [ 34.711716] BUG: Bad rss-counter state mm:000000002e29fd71 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:64224' (ECDSA) to the list of known hosts. 2023/06/20 02:28:12 fuzzer started 2023/06/20 02:28:13 dialing manager at localhost:44161 2023/06/20 02:28:13 checking machine... 2023/06/20 02:28:13 checking revisions... [ 35.418388] kmemleak: Automatic memory scanning thread ended 2023/06/20 02:28:13 testing simple program... [ 35.462170] cgroup: Unknown subsys name 'net' [ 35.502970] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 02:28:11 Registers: info registers vcpu 0 RAX=0000000000000001 RBX=ffffffff813ad420 RCX=0000000000000001 RDX=ffff888008ee7a40 RSI=ffff888008ee7a28 RDI=ffff888008ee7468 RBP=ffff888008ee0000 RSP=ffff888008ee7428 R8 =0000000000000001 R9 =ffff888008ee7498 R10=0000000000038001 R11=0000000000091beb R12=ffff888008ee74b8 R13=ffff888008ee74a0 R14=ffff888008ee7a28 R15=ffff888008ee7458 RIP=ffffffff81130930 RFL=00000292 [--S-A--] 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 00007fbe627ee900 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=00007ffcbf79c000 CR3=000000001c9b2000 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=00007f824d49b970 CR3=000000000c7d0000 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=cb2c4d5d51752b843b4c1400870d3cea XMM02=000000000011cbc8eff9b2d0a8fce9cb XMM03=000000000011cc982c67c8bc2e329bc3 XMM04=ed0f96325f9c6c5400000000000ae988 XMM05=19e9129bd510f2350000000000133cc8 XMM06=4fda316b135da52b0000000000133b50 XMM07=e042d86d42eb936e0000000000124358 XMM08=2d5ae5f33ce5b85c000000000011cc98 XMM09=00000000000000000000000000000000 XMM10=20200000000020202020202020200000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000