syzkaller login: [ 38.091462] BUG: Bad rss-counter state mm:00000000a052cb0d type:MM_FILEPAGES val:33 [ 38.092149] BUG: Bad rss-counter state mm:00000000a052cb0d type:MM_ANONPAGES val:22 [ 38.297559] ================================================================== [ 38.298167] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 38.298765] Read of size 8 at addr ffff88800e41bed8 by task sshd/219 [ 38.299259] [ 38.299401] CPU: 1 PID: 219 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 38.299954] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 38.300576] Call Trace: [ 38.300841] [ 38.301031] dump_stack_lvl+0x91/0xf0 [ 38.301356] print_report+0xcc/0x620 [ 38.301679] ? __virt_addr_valid+0x102/0x340 [ 38.302041] ? vma_interval_tree_remove+0xc75/0xec0 [ 38.302442] ? vma_interval_tree_remove+0xc75/0xec0 [ 38.302841] kasan_report+0xbe/0xf0 [ 38.303156] ? vma_interval_tree_remove+0xc75/0xec0 [ 38.303560] vma_interval_tree_remove+0xc75/0xec0 [ 38.303954] vma_prepare+0xc54/0x11a0 [ 38.304268] __split_vma+0x5af/0x950 [ 38.304611] ? __pfx___split_vma+0x10/0x10 [ 38.305992] ? find_held_lock+0x2c/0x110 [ 38.306332] do_vmi_align_munmap+0x2ba/0x11f0 [ 38.306704] ? lock_is_held_type+0x9f/0x120 [ 38.307058] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 38.307456] ? mtree_range_walk+0x632/0x900 [ 38.307818] ? mas_walk+0x5c7/0x7c0 [ 38.308133] do_vmi_munmap+0x1f1/0x2b0 [ 38.308453] mmap_region+0x1f9/0x2660 [ 38.308804] ? vm_mmap_pgoff+0x15c/0x3a0 [ 38.309140] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 38.309603] ? __pfx_lock_acquire+0x10/0x10 [ 38.309961] ? __pfx_mmap_region+0x10/0x10 [ 38.310311] ? security_mmap_addr+0x7d/0xa0 [ 38.311481] ? get_unmapped_area+0x1f5/0x3f0 [ 38.311958] do_mmap+0x854/0xf00 [ 38.312344] vm_mmap_pgoff+0x1a6/0x3a0 [ 38.312865] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 38.313356] ksys_mmap_pgoff+0x3af/0x500 [ 38.313873] do_syscall_64+0x3f/0x90 [ 38.314263] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 38.314756] RIP: 0033:0x7fc290b27d82 [ 38.315118] 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 [ 38.320163] RSP: 002b:00007ffe73966cc8 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 38.324886] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007fc290b27d82 [ 38.325444] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007fc28ff61000 [ 38.327330] RBP: 00007fc28ff61000 R08: 0000000000000009 R09: 0000000000001000 [ 38.327905] R10: 0000000000000812 R11: 0000000000000206 R12: 0000559be0564ec0 [ 38.328442] R13: 00007ffe73966ce0 R14: 00007ffe73966d10 R15: 00007ffe73967070 [ 38.329553] [ 38.329747] [ 38.329890] Allocated by task 212: [ 38.330176] kasan_save_stack+0x22/0x50 [ 38.330514] kasan_set_track+0x25/0x30 [ 38.330837] __kasan_slab_alloc+0x59/0x70 [ 38.331178] kmem_cache_alloc+0x16b/0x370 [ 38.331518] vm_area_dup+0x20/0x160 [ 38.331819] __split_vma+0x170/0x950 [ 38.332127] split_vma+0xc6/0x110 [ 38.332416] mprotect_fixup+0x8d2/0xb30 [ 38.333233] do_mprotect_pkey+0x87e/0xd40 [ 38.333571] __x64_sys_mprotect+0x78/0xc0 [ 38.333910] do_syscall_64+0x3f/0x90 [ 38.334268] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 38.334719] [ 38.334861] Freed by task 212: [ 38.335189] kasan_save_stack+0x22/0x50 [ 38.335511] kasan_set_track+0x25/0x30 [ 38.335874] kasan_save_free_info+0x2b/0x50 [ 38.336268] __kasan_slab_free+0x10a/0x190 [ 38.336615] kmem_cache_free+0x10d/0x4d0 [ 38.341478] rcu_core+0x8c8/0x2860 [ 38.341774] __do_softirq+0x1b7/0x7d4 [ 38.342132] [ 38.342274] Last potentially related work creation: [ 38.342659] kasan_save_stack+0x22/0x50 [ 38.343013] __kasan_record_aux_stack+0x8e/0xa0 [ 38.343463] __call_rcu_common.constprop.0+0x6a/0xb90 [ 38.343882] remove_vma+0x139/0x170 [ 38.344225] do_vmi_align_munmap+0xd4a/0x11f0 [ 38.344584] do_vmi_munmap+0x1f1/0x2b0 [ 38.344920] __vm_munmap+0x138/0x3a0 [ 38.345256] __x64_sys_munmap+0x59/0x80 [ 38.345576] do_syscall_64+0x3f/0x90 [ 38.345886] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 38.346352] [ 38.346496] Second to last potentially related work creation: [ 38.346982] kasan_save_stack+0x22/0x50 [ 38.347401] __kasan_record_aux_stack+0x8e/0xa0 [ 38.347804] __call_rcu_common.constprop.0+0x6a/0xb90 [ 38.348344] remove_vma+0x139/0x170 [ 38.349222] do_vmi_align_munmap+0xd4a/0x11f0 [ 38.349623] do_vmi_munmap+0x1f1/0x2b0 [ 38.350108] mmap_region+0x1f9/0x2660 [ 38.350463] do_mmap+0x854/0xf00 [ 38.350767] vm_mmap_pgoff+0x1a6/0x3a0 [ 38.351137] ksys_mmap_pgoff+0x3af/0x500 [ 38.351468] do_syscall_64+0x3f/0x90 [ 38.351796] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 38.352278] [ 38.352420] The buggy address belongs to the object at ffff88800e41be80 [ 38.352420] which belongs to the cache vm_area_struct of size 168 [ 38.354484] The buggy address is located 88 bytes inside of [ 38.354484] freed 168-byte region [ffff88800e41be80, ffff88800e41bf28) [ 38.355470] [ 38.355621] The buggy address belongs to the physical page: [ 38.356045] page:0000000048c119ed refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xe41b [ 38.357633] memcg:ffff88800dd7d801 [ 38.357939] flags: 0x100000000000200(slab|node=0|zone=1) [ 38.358491] page_type: 0xffffffff() [ 38.358801] raw: 0100000000000200 ffff8880087a0c80 dead000000000100 dead000000000122 [ 38.359624] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800dd7d801 [ 38.360260] page dumped because: kasan: bad access detected [ 38.360739] [ 38.360880] Memory state around the buggy address: [ 38.361319] ffff88800e41bd80: fc fc fc fa fb fb fb fb fb fb fb fb fb fb fb fb [ 38.361868] ffff88800e41be00: fb fb fb fb fb fb fb fb fc fc fc fc fc fc fc fc [ 38.362501] >ffff88800e41be80: fa fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 38.363298] ^ [ 38.363776] ffff88800e41bf00: fb fb fb fb fb fc fc fc fc fc fc fc fc fc fc fc [ 38.364390] ffff88800e41bf80: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc [ 38.365530] ================================================================== [ 38.380744] Disabling lock debugging due to kernel taint [ 42.303830] BUG: Bad rss-counter state mm:00000000dd6f813c type:MM_FILEPAGES val:33 [ 42.304503] BUG: Bad rss-counter state mm:00000000dd6f813c type:MM_ANONPAGES val:22 [ 43.996778] BUG: Bad rss-counter state mm:000000008c6136db type:MM_FILEPAGES val:33 [ 43.997550] BUG: Bad rss-counter state mm:000000008c6136db type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:48037' (ECDSA) to the list of known hosts. 2023/06/21 08:19:13 fuzzer started 2023/06/21 08:19:14 dialing manager at localhost:36067 2023/06/21 08:19:14 checking machine... 2023/06/21 08:19:14 checking revisions... [ 44.880786] kmemleak: Automatic memory scanning thread ended 2023/06/21 08:19:14 testing simple program... [ 44.941568] cgroup: Unknown subsys name 'net' [ 45.025905] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 08:19:14 Registers: info registers vcpu 0 RAX=dffffc0000000000 RBX=ffff8880145776d0 RCX=0000000000000001 RDX=1ffff110028aeedc RSI=ffff888014577bd0 RDI=ffff8880145776e0 RBP=ffff888014577bd0 RSP=ffff888014577628 R8 =ffffffff86126536 R9 =ffff888014577710 R10=0000000000038001 R11=000000000001dc07 R12=0000000000000008 R13=ffff888014570000 R14=ffff888014577bd8 R15=ffff8880145776d0 RIP=ffffffff8113046e 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 0000000000000000 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=00007f547d3b9328 CR3=00000000144ea000 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=00000000000000000000000000000000 XMM01=652022746f6f72223d74636361207469 XMM02=3d6c616e696d72657420322e322e302e XMM03=3d656d616e74736f682022646873732f XMM04=40404040404040404040404040404040 XMM05=5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a XMM06=20202020202020202020202020202020 XMM07=00000000000000000000000000000000 XMM08=652075253d64692073253d706f000000 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=ffffffff8111a670 RBX=ffffffff852c7cc0 RCX=ffffffff81128d81 RDX=1ffffffff0a58f99 RSI=0000000000000000 RDI=00000000000000b0 RBP=ffff888008e07dc8 RSP=ffff88806cf09fe0 R8 =0000000000000001 R9 =ffffed100d9e5059 R10=ffff88806cf282cf R11=ffff88806cf09ff8 R12=0000000000000001 R13=0000000000000000 R14=0000000000000000 R15=0000000000000000 RIP=ffffffff8111a67c RFL=00000046 [---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 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=00007f3bc4b276f8 CR3=000000000e566000 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=ffffffffffff00000000000000000000 XMM02=ffffffffffff00000000000000000000 XMM03=00000000000000000000000000000000 XMM04=00000000000000000000000000000000 XMM05=00000000000000000000000000000000 XMM06=00000000000000000000000000000000 XMM07=00000000000000000000000000000000 XMM08=00000000000073707574726174732064 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000