syzkaller login: [ 28.754022] BUG: Bad rss-counter state mm:00000000f359b587 type:MM_FILEPAGES val:33 [ 28.756184] BUG: Bad rss-counter state mm:00000000f359b587 type:MM_ANONPAGES val:22 [ 28.923390] ================================================================== [ 28.924454] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 28.925395] Read of size 8 at addr ffff888016575df0 by task sshd/219 [ 28.926205] [ 28.926426] CPU: 1 PID: 219 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 28.927305] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 28.928289] Call Trace: [ 28.928615] [ 28.928898] dump_stack_lvl+0x91/0xf0 [ 28.929394] print_report+0xcc/0x620 [ 28.929880] ? __virt_addr_valid+0x102/0x340 [ 28.930443] ? vma_interval_tree_remove+0xc75/0xec0 [ 28.931092] ? vma_interval_tree_remove+0xc75/0xec0 [ 28.931714] kasan_report+0xbe/0xf0 [ 28.932193] ? vma_interval_tree_remove+0xc75/0xec0 [ 28.932828] vma_interval_tree_remove+0xc75/0xec0 [ 28.933443] vma_prepare+0xc54/0x11a0 [ 28.933931] __split_vma+0x5af/0x950 [ 28.934402] ? __pfx___split_vma+0x10/0x10 [ 28.934957] ? find_held_lock+0x2c/0x110 [ 28.935475] do_vmi_align_munmap+0x2ba/0x11f0 [ 28.936040] ? lock_is_held_type+0x9f/0x120 [ 28.936576] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 28.937181] ? mtree_range_walk+0x632/0x900 [ 28.937737] ? mas_walk+0x5c7/0x7c0 [ 28.938213] do_vmi_munmap+0x1f1/0x2b0 [ 28.938703] mmap_region+0x1f9/0x2660 [ 28.939194] ? vm_mmap_pgoff+0x15c/0x3a0 [ 28.939713] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 28.940433] ? __pfx_lock_acquire+0x10/0x10 [ 28.940971] ? __pfx_mmap_region+0x10/0x10 [ 28.941502] ? security_mmap_addr+0x7d/0xa0 [ 28.942033] ? get_unmapped_area+0x1f5/0x3f0 [ 28.942587] do_mmap+0x854/0xf00 [ 28.943039] vm_mmap_pgoff+0x1a6/0x3a0 [ 28.943544] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 28.944106] ksys_mmap_pgoff+0x3af/0x500 [ 28.944619] do_syscall_64+0x3f/0x90 [ 28.945098] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 28.945744] RIP: 0033:0x7f376c435d82 [ 28.946207] 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 [ 28.948347] RSP: 002b:00007ffc6c9f5fd8 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 28.949250] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f376c435d82 [ 28.950095] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f376b86f000 [ 28.951087] RBP: 00007f376b86f000 R08: 0000000000000009 R09: 0000000000001000 [ 28.952083] R10: 0000000000000812 R11: 0000000000000206 R12: 0000564eabf51d90 [ 28.953076] R13: 00007ffc6c9f5ff0 R14: 00007ffc6c9f6020 R15: 00007ffc6c9f6380 [ 28.954091] [ 28.954434] [ 28.954692] Allocated by task 211: [ 28.955226] kasan_save_stack+0x22/0x50 [ 28.955818] kasan_set_track+0x25/0x30 [ 28.956403] __kasan_slab_alloc+0x59/0x70 [ 28.957021] kmem_cache_alloc+0x16b/0x370 [ 28.957626] vm_area_dup+0x20/0x160 [ 28.958160] __split_vma+0x170/0x950 [ 28.958740] split_vma+0xc6/0x110 [ 28.959310] mprotect_fixup+0x8d2/0xb30 [ 28.959945] do_mprotect_pkey+0x87e/0xd40 [ 28.960605] __x64_sys_mprotect+0x78/0xc0 [ 28.961256] do_syscall_64+0x3f/0x90 [ 28.961863] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 28.962684] [ 28.962975] Freed by task 211: [ 28.963481] kasan_save_stack+0x22/0x50 [ 28.964121] kasan_set_track+0x25/0x30 [ 28.964810] kasan_save_free_info+0x2b/0x50 [ 28.965501] __kasan_slab_free+0x10a/0x190 [ 28.966171] kmem_cache_free+0x10d/0x4d0 [ 28.966841] rcu_core+0x8c8/0x2860 [ 28.967409] __do_softirq+0x1b7/0x7d4 [ 28.968025] [ 28.968296] Last potentially related work creation: [ 28.969060] kasan_save_stack+0x22/0x50 [ 28.969709] __kasan_record_aux_stack+0x8e/0xa0 [ 28.970444] __call_rcu_common.constprop.0+0x6a/0xb90 [ 28.971283] remove_vma+0x139/0x170 [ 28.971850] do_vmi_align_munmap+0xd4a/0x11f0 [ 28.972571] do_vmi_munmap+0x1f1/0x2b0 [ 28.973178] __vm_munmap+0x138/0x3a0 [ 28.973797] __x64_sys_munmap+0x59/0x80 [ 28.974456] do_syscall_64+0x3f/0x90 [ 28.975077] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 28.975914] [ 28.976193] The buggy address belongs to the object at ffff888016575d98 [ 28.976193] which belongs to the cache vm_area_struct of size 168 [ 28.978111] The buggy address is located 88 bytes inside of [ 28.978111] freed 168-byte region [ffff888016575d98, ffff888016575e40) [ 28.979972] [ 28.980244] The buggy address belongs to the physical page: [ 28.981097] page:00000000c2bb02f7 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x16575 [ 28.982514] memcg:ffff88800c646701 [ 28.983078] flags: 0x100000000000200(slab|node=0|zone=1) [ 28.983924] page_type: 0xffffffff() [ 28.984510] raw: 0100000000000200 ffff8880087a0c80 dead000000000122 0000000000000000 [ 28.985716] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800c646701 [ 28.986914] page dumped because: kasan: bad access detected [ 28.987788] [ 28.988065] Memory state around the buggy address: [ 28.988826] ffff888016575c80: fc fc fc fc fc fc 00 00 00 00 00 00 00 00 00 00 [ 28.989953] ffff888016575d00: 00 00 00 00 00 00 00 00 00 00 00 fc fc fc fc fc [ 28.991082] >ffff888016575d80: fc fc fc fa fb fb fb fb fb fb fb fb fb fb fb fb [ 28.992189] ^ [ 28.993248] ffff888016575e00: fb fb fb fb fb fb fb fb fc fc fc fc fc fc fc fc [ 28.994377] ffff888016575e80: fa fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 28.995488] ================================================================== [ 28.996674] Disabling lock debugging due to kernel taint [ 31.160044] BUG: Bad rss-counter state mm:000000005a57597c type:MM_FILEPAGES val:33 [ 31.161039] BUG: Bad rss-counter state mm:000000005a57597c type:MM_ANONPAGES val:22 [ 31.712370] BUG: Bad rss-counter state mm:00000000d0aa4347 type:MM_FILEPAGES val:33 [ 31.713679] BUG: Bad rss-counter state mm:00000000d0aa4347 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:49156' (ECDSA) to the list of known hosts. 2023/06/21 03:35:51 fuzzer started 2023/06/21 03:35:51 dialing manager at localhost:36067 2023/06/21 03:35:51 checking machine... 2023/06/21 03:35:51 checking revisions... [ 32.364285] kmemleak: Automatic memory scanning thread ended 2023/06/21 03:35:51 testing simple program... [ 32.414148] cgroup: Unknown subsys name 'net' [ 32.461476] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 03:35:50 Registers: info registers vcpu 0 RAX=0000000080010000 RBX=0000000000000000 RCX=0000000080010000 RDX=0000000000000000 RSI=ffffffff813c9237 RDI=ffffffff85d3d350 RBP=ffff88806ce28140 RSP=ffff88806ce09e98 R8 =0000000000000000 R9 =fffffbfff0ba7a6a R10=ffffffff85d3d357 R11=0000000000000001 R12=0000000754f34480 R13=0000000000000000 R14=0000000000000000 R15=dffffc0000000000 RIP=ffffffff814c0871 RFL=00000086 [--S--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 00007f67e56c8900 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=00007ffd9e619000 CR3=00000000094f2000 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=0000000000000001 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=00007f5c70002dd0 CR3=000000000ca9a000 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=99868f7665e1048a1e42e608536d1189 XMM02=000000000011aa98ec2efd57dc4c00df XMM03=000000000012218872380a6efae05a8d XMM04=b85b9aae96c43ff500000000000ae988 XMM05=dfcdbad4f1609c370000000000132790 XMM06=5b4a465efc1672f300000000001315f8 XMM07=e042d86d42eb936e0000000000122bc8 XMM08=72380a6efae05a8d000000000011aaf8 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000