syzkaller login: [ 30.761644] BUG: Bad rss-counter state mm:000000008afbd5ee type:MM_FILEPAGES val:33 [ 30.762619] BUG: Bad rss-counter state mm:000000008afbd5ee type:MM_ANONPAGES val:22 [ 30.921513] ================================================================== [ 30.922374] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 30.923274] Read of size 8 at addr ffff888019463880 by task sshd/221 [ 30.923999] [ 30.924208] CPU: 0 PID: 221 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 30.925102] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 30.926004] Call Trace: [ 30.926305] [ 30.926597] dump_stack_lvl+0x91/0xf0 [ 30.927069] print_report+0xcc/0x620 [ 30.927523] ? __virt_addr_valid+0x102/0x340 [ 30.928050] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.928646] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.929245] kasan_report+0xbe/0xf0 [ 30.929713] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.930326] vma_interval_tree_remove+0xc75/0xec0 [ 30.930927] vma_prepare+0xc54/0x11a0 [ 30.931386] __split_vma+0x5af/0x950 [ 30.931841] ? __pfx___split_vma+0x10/0x10 [ 30.932360] ? find_held_lock+0x2c/0x110 [ 30.932867] do_vmi_align_munmap+0x2ba/0x11f0 [ 30.933418] ? lock_is_held_type+0x9f/0x120 [ 30.933951] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 30.934543] ? mtree_range_walk+0x632/0x900 [ 30.935108] ? mas_walk+0x5c7/0x7c0 [ 30.935574] do_vmi_munmap+0x1f1/0x2b0 [ 30.936069] mmap_region+0x1f9/0x2660 [ 30.936537] ? vm_mmap_pgoff+0x15c/0x3a0 [ 30.937046] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 30.937752] ? __pfx_lock_acquire+0x10/0x10 [ 30.938280] ? __pfx_mmap_region+0x10/0x10 [ 30.938832] ? security_mmap_addr+0x7d/0xa0 [ 30.939361] ? get_unmapped_area+0x1f5/0x3f0 [ 30.939906] do_mmap+0x854/0xf00 [ 30.940340] vm_mmap_pgoff+0x1a6/0x3a0 [ 30.940832] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 30.941384] ksys_mmap_pgoff+0x3af/0x500 [ 30.941890] do_syscall_64+0x3f/0x90 [ 30.942355] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.942999] RIP: 0033:0x7f7bef01cd82 [ 30.943443] 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 [ 30.945537] RSP: 002b:00007ffe6dc9cdf8 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 30.946424] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f7bef01cd82 [ 30.947269] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f7bee456000 [ 30.948105] RBP: 00007f7bee456000 R08: 0000000000000009 R09: 0000000000001000 [ 30.948924] R10: 0000000000000812 R11: 0000000000000206 R12: 00005596c71adf70 [ 30.949751] R13: 00007ffe6dc9ce10 R14: 00007ffe6dc9ce40 R15: 00007ffe6dc9d1a0 [ 30.950609] [ 30.950898] [ 30.951111] Allocated by task 214: [ 30.951530] kasan_save_stack+0x22/0x50 [ 30.952020] kasan_set_track+0x25/0x30 [ 30.952510] __kasan_slab_alloc+0x59/0x70 [ 30.953026] kmem_cache_alloc+0x16b/0x370 [ 30.953528] vm_area_dup+0x20/0x160 [ 30.953977] __split_vma+0x170/0x950 [ 30.954440] split_vma+0xc6/0x110 [ 30.954876] mprotect_fixup+0x8d2/0xb30 [ 30.955367] do_mprotect_pkey+0x87e/0xd40 [ 30.955887] __x64_sys_mprotect+0x78/0xc0 [ 30.956401] do_syscall_64+0x3f/0x90 [ 30.956868] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.957497] [ 30.957706] Freed by task 214: [ 30.958096] kasan_save_stack+0x22/0x50 [ 30.958618] kasan_set_track+0x25/0x30 [ 30.959111] kasan_save_free_info+0x2b/0x50 [ 30.959629] __kasan_slab_free+0x10a/0x190 [ 30.960153] kmem_cache_free+0x10d/0x4d0 [ 30.960660] rcu_core+0x8c8/0x2860 [ 30.961099] __do_softirq+0x1b7/0x7d4 [ 30.961562] [ 30.961773] Last potentially related work creation: [ 30.962358] kasan_save_stack+0x22/0x50 [ 30.962864] __kasan_record_aux_stack+0x8e/0xa0 [ 30.963422] __call_rcu_common.constprop.0+0x6a/0xb90 [ 30.964055] remove_vma+0x139/0x170 [ 30.964490] do_vmi_align_munmap+0xd4a/0x11f0 [ 30.965038] do_vmi_munmap+0x1f1/0x2b0 [ 30.965513] __vm_munmap+0x138/0x3a0 [ 30.965975] __x64_sys_munmap+0x59/0x80 [ 30.966457] do_syscall_64+0x3f/0x90 [ 30.966936] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.967575] [ 30.967781] The buggy address belongs to the object at ffff888019463828 [ 30.967781] which belongs to the cache vm_area_struct of size 168 [ 30.969219] The buggy address is located 88 bytes inside of [ 30.969219] freed 168-byte region [ffff888019463828, ffff8880194638d0) [ 30.970617] [ 30.970831] The buggy address belongs to the physical page: [ 30.971481] page:00000000db990704 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x19463 [ 30.972563] memcg:ffff88800ea34e01 [ 30.972990] flags: 0x100000000000200(slab|node=0|zone=1) [ 30.973632] page_type: 0xffffffff() [ 30.974077] raw: 0100000000000200 ffff8880087a0c80 dead000000000122 0000000000000000 [ 30.974982] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800ea34e01 [ 30.975871] page dumped because: kasan: bad access detected [ 30.976519] [ 30.976729] Memory state around the buggy address: [ 30.977300] ffff888019463780: 00 00 00 00 00 00 00 00 00 00 00 00 00 fc fc fc [ 30.978134] ffff888019463800: fc fc fc fc fc fa fb fb fb fb fb fb fb fb fb fb [ 30.978990] >ffff888019463880: fb fb fb fb fb fb fb fb fb fb fc fc fc fc fc fc [ 30.979822] ^ [ 30.980224] ffff888019463900: fc fc fa fb fb fb fb fb fb fb fb fb fb fb fb fb [ 30.981058] ffff888019463980: fb fb fb fb fb fb fb fc fc fc fc fc fc fc fc 00 [ 30.981891] ================================================================== [ 30.982846] Disabling lock debugging due to kernel taint [ 33.096575] BUG: Bad rss-counter state mm:00000000bec5c744 type:MM_FILEPAGES val:33 [ 33.097498] BUG: Bad rss-counter state mm:00000000bec5c744 type:MM_ANONPAGES val:22 [ 33.634046] BUG: Bad rss-counter state mm:00000000bf571099 type:MM_FILEPAGES val:33 [ 33.635263] BUG: Bad rss-counter state mm:00000000bf571099 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:58348' (ECDSA) to the list of known hosts. 2023/06/21 04:39:42 fuzzer started 2023/06/21 04:39:43 dialing manager at localhost:36067 2023/06/21 04:39:43 checking machine... 2023/06/21 04:39:43 checking revisions... [ 34.373498] kmemleak: Automatic memory scanning thread ended 2023/06/21 04:39:43 testing simple program... [ 34.434025] cgroup: Unknown subsys name 'net' [ 34.490795] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 04:39:42 Registers: info registers vcpu 0 RAX=dffffc0000000000 RBX=ffffffff813ad470 RCX=0000000000000001 RDX=1ffff11002beee93 RSI=ffffffff8363e261 RDI=ffff888015f77498 RBP=ffff888015f77530 RSP=ffff888015f77470 R8 =0000000000000001 R9 =ffff888015f774d8 R10=0000000000038001 R11=000000000008aa79 R12=ffff888015f77560 R13=0000000000000000 R14=ffff888015eb1b40 R15=ffff888015f77498 RIP=ffffffff811305f0 RFL=00000216 [----AP-] 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 00007f96a6e6c900 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=00007ffc215c5000 CR3=0000000013a38000 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=ffffffff8451250e RDX=ffffed100d9e6a01 RSI=0000000000000004 RDI=ffffffff81288ac5 RBP=dffffc0000000000 RSP=ffff888008e07e70 R8 =0000000000000000 R9 =ffffed100d9e6a00 R10=ffff88806cf35003 R11=ffff888008c04400 R12=ffffffff85d3d350 R13=1ffff110011c0fd3 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 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=00007f23d1edf550 CR3=000000000f18c000 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=4003e19403607f993c466aaf0feed37b XMM02=2c67c8bc2e329bc3000000000011b0a0 XMM03=fb795ef6d65770560000000000121d70 XMM04=1fd6489d49e7afb900000000000ae988 XMM05=e4cb8bb95a7664b60000000000131bc8 XMM06=aa9e098b7b7c10760000000000130a30 XMM07=e042d86d42eb936e0000000000121ff0 XMM08=2f32ecedfa0c661d000000000011b100 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000