syzkaller login: [ 67.416352] BUG: Bad rss-counter state mm:00000000fe6ebb4d type:MM_FILEPAGES val:33 [ 67.417700] BUG: Bad rss-counter state mm:00000000fe6ebb4d type:MM_ANONPAGES val:22 [ 67.552649] ================================================================== [ 67.553560] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 67.554479] Read of size 8 at addr ffff88801b7d5310 by task sshd/219 [ 67.555231] [ 67.555447] CPU: 1 PID: 219 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 67.556407] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 67.557419] Call Trace: [ 67.557740] [ 67.558024] dump_stack_lvl+0x91/0xf0 [ 67.558508] print_report+0xcc/0x620 [ 67.559006] ? __virt_addr_valid+0x102/0x340 [ 67.559555] ? vma_interval_tree_remove+0xc75/0xec0 [ 67.560165] ? vma_interval_tree_remove+0xc75/0xec0 [ 67.560801] kasan_report+0xbe/0xf0 [ 67.561272] ? vma_interval_tree_remove+0xc75/0xec0 [ 67.561901] vma_interval_tree_remove+0xc75/0xec0 [ 67.562509] vma_prepare+0xc54/0x11a0 [ 67.562985] __split_vma+0x5af/0x950 [ 67.563454] ? __pfx___split_vma+0x10/0x10 [ 67.563981] ? find_held_lock+0x2c/0x110 [ 67.564503] do_vmi_align_munmap+0x2ba/0x11f0 [ 67.565063] ? lock_is_held_type+0x9f/0x120 [ 67.565601] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 67.566211] ? mtree_range_walk+0x632/0x900 [ 67.566761] ? mas_walk+0x5c7/0x7c0 [ 67.567228] do_vmi_munmap+0x1f1/0x2b0 [ 67.567726] mmap_region+0x1f9/0x2660 [ 67.568214] ? vm_mmap_pgoff+0x15c/0x3a0 [ 67.568727] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 67.569436] ? __pfx_lock_acquire+0x10/0x10 [ 67.569973] ? __pfx_mmap_region+0x10/0x10 [ 67.570499] ? security_mmap_addr+0x7d/0xa0 [ 67.571025] ? get_unmapped_area+0x1f5/0x3f0 [ 67.571580] do_mmap+0x854/0xf00 [ 67.572025] vm_mmap_pgoff+0x1a6/0x3a0 [ 67.572533] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 67.573094] ksys_mmap_pgoff+0x3af/0x500 [ 67.573600] do_syscall_64+0x3f/0x90 [ 67.574074] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 67.574715] RIP: 0033:0x7f50e77acd82 [ 67.575165] 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 [ 67.577266] RSP: 002b:00007ffcec73bc58 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 67.578156] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f50e77acd82 [ 67.578988] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f50e6be6000 [ 67.579837] RBP: 00007f50e6be6000 R08: 0000000000000009 R09: 0000000000001000 [ 67.580684] R10: 0000000000000812 R11: 0000000000000206 R12: 00005622643c9ec0 [ 67.581518] R13: 00007ffcec73bc70 R14: 00007ffcec73bca0 R15: 00007ffcec73c000 [ 67.582356] [ 67.582647] [ 67.582860] Allocated by task 212: [ 67.583286] kasan_save_stack+0x22/0x50 [ 67.583784] kasan_set_track+0x25/0x30 [ 67.584288] __kasan_slab_alloc+0x59/0x70 [ 67.584849] kmem_cache_alloc+0x16b/0x370 [ 67.585358] vm_area_dup+0x20/0x160 [ 67.585806] __split_vma+0x170/0x950 [ 67.586268] split_vma+0xc6/0x110 [ 67.586707] mprotect_fixup+0x8d2/0xb30 [ 67.587203] do_mprotect_pkey+0x87e/0xd40 [ 67.587716] __x64_sys_mprotect+0x78/0xc0 [ 67.588237] do_syscall_64+0x3f/0x90 [ 67.588709] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 67.589344] [ 67.589558] Freed by task 212: [ 67.589943] kasan_save_stack+0x22/0x50 [ 67.590438] kasan_set_track+0x25/0x30 [ 67.590925] kasan_save_free_info+0x2b/0x50 [ 67.591448] __kasan_slab_free+0x10a/0x190 [ 67.591974] kmem_cache_free+0x10d/0x4d0 [ 67.592487] rcu_core+0x8c8/0x2860 [ 67.592927] __do_softirq+0x1b7/0x7d4 [ 67.593403] [ 67.593617] Last potentially related work creation: [ 67.594194] kasan_save_stack+0x22/0x50 [ 67.594694] __kasan_record_aux_stack+0x8e/0xa0 [ 67.595265] __call_rcu_common.constprop.0+0x6a/0xb90 [ 67.595903] remove_vma+0x139/0x170 [ 67.596361] do_vmi_align_munmap+0xd4a/0x11f0 [ 67.596909] do_vmi_munmap+0x1f1/0x2b0 [ 67.597390] __vm_munmap+0x138/0x3a0 [ 67.597928] __x64_sys_munmap+0x59/0x80 [ 67.598422] do_syscall_64+0x3f/0x90 [ 67.598893] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 67.599527] [ 67.599741] The buggy address belongs to the object at ffff88801b7d52b8 [ 67.599741] which belongs to the cache vm_area_struct of size 168 [ 67.601201] The buggy address is located 88 bytes inside of [ 67.601201] freed 168-byte region [ffff88801b7d52b8, ffff88801b7d5360) [ 67.602591] [ 67.602806] The buggy address belongs to the physical page: [ 67.603461] page:0000000071ede524 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x1b7d5 [ 67.604560] memcg:ffff88801b7ebc01 [ 67.604981] flags: 0x100000000000200(slab|node=0|zone=1) [ 67.605618] page_type: 0xffffffff() [ 67.606060] raw: 0100000000000200 ffff88800879fc80 dead000000000122 0000000000000000 [ 67.606973] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88801b7ebc01 [ 67.607869] page dumped because: kasan: bad access detected [ 67.608534] [ 67.608753] Memory state around the buggy address: [ 67.609321] ffff88801b7d5200: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 fc [ 67.610164] ffff88801b7d5280: fc fc fc fc fc fc fc fa fb fb fb fb fb fb fb fb [ 67.611006] >ffff88801b7d5300: fb fb fb fb fb fb fb fb fb fb fb fb fc fc fc fc [ 67.611848] ^ [ 67.612311] ffff88801b7d5380: fc fc fc fc fa fb fb fb fb fb fb fb fb fb fb fb [ 67.613160] ffff88801b7d5400: fb fb fb fb fb fb fb fb fb fc fc fc fc fc fc fc [ 67.613997] ================================================================== [ 67.615073] Disabling lock debugging due to kernel taint [ 69.633795] BUG: Bad rss-counter state mm:00000000e24aabd1 type:MM_FILEPAGES val:33 [ 69.634643] BUG: Bad rss-counter state mm:00000000e24aabd1 type:MM_ANONPAGES val:22 [ 70.135297] BUG: Bad rss-counter state mm:00000000515d8227 type:MM_FILEPAGES val:33 [ 70.136542] BUG: Bad rss-counter state mm:00000000515d8227 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:27916' (ECDSA) to the list of known hosts. 2023/06/20 04:32:49 fuzzer started 2023/06/20 04:32:49 dialing manager at localhost:44161 2023/06/20 04:32:49 checking machine... 2023/06/20 04:32:49 checking revisions... [ 70.836413] kmemleak: Automatic memory scanning thread ended 2023/06/20 04:32:49 testing simple program... [ 70.887530] cgroup: Unknown subsys name 'net' [ 70.932401] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 04:32:42 Registers: info registers vcpu 0 RAX=dffffc0000000000 RBX=ffffffff83640764 RCX=0000000000000001 RDX=1ffff1100d9c135e RSI=ffff88800f0a7ce8 RDI=ffffffff83640764 RBP=ffff88806ce09af0 RSP=ffff88806ce09a68 R8 =0000000000000001 R9 =ffff88806ce09ad8 R10=0000000000038001 R11=000000000008a899 R12=ffff88806ce09b60 R13=0000000000000000 R14=ffff8880102bd1c0 R15=ffff88800cba38d0 RIP=ffffffff811fc7a0 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 00007f5deb0c7900 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=00007ffe4d1c0000 CR3=000000000e5e2000 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=ffff888008c58400 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=00007f08691467d0 CR3=000000000d5bc000 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=109fe7b2fc07969a324fdd76ae1e2187 XMM02=ec2efd57dc4c00df000000000011f9f8 XMM03=4f7d0a64dd5be5e0000000000011fac8 XMM04=34143ca9da7bb85e00000000000ae988 XMM05=dfcdbad4f1609c3700000000001332a8 XMM06=24359d3b55c76c370000000000131d18 XMM07=e042d86d42eb936e00000000001239f0 XMM08=4f7d0a64dd5be5e0000000000011fac8 XMM09=00000000000000000000000000000000 XMM10=20200000000020202020202020200000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000