syzkaller login: [ 40.305725] BUG: Bad rss-counter state mm:00000000af1587c8 type:MM_FILEPAGES val:33 [ 40.307212] BUG: Bad rss-counter state mm:00000000af1587c8 type:MM_ANONPAGES val:22 [ 40.469236] ================================================================== [ 40.470194] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 40.471200] Read of size 8 at addr ffff88800c55a140 by task sshd/220 [ 40.472151] [ 40.472388] CPU: 0 PID: 220 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 40.473306] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 40.474347] Call Trace: [ 40.474691] [ 40.474996] dump_stack_lvl+0x91/0xf0 [ 40.475517] print_report+0xcc/0x620 [ 40.476056] ? __virt_addr_valid+0x102/0x340 [ 40.476642] ? vma_interval_tree_remove+0xc75/0xec0 [ 40.477297] ? vma_interval_tree_remove+0xc75/0xec0 [ 40.477961] kasan_report+0xbe/0xf0 [ 40.478463] ? vma_interval_tree_remove+0xc75/0xec0 [ 40.479151] vma_interval_tree_remove+0xc75/0xec0 [ 40.479841] vma_prepare+0xc54/0x11a0 [ 40.480371] __split_vma+0x5af/0x950 [ 40.480892] ? __pfx___split_vma+0x10/0x10 [ 40.481474] ? find_held_lock+0x2c/0x110 [ 40.482051] do_vmi_align_munmap+0x2ba/0x11f0 [ 40.482673] ? lock_is_held_type+0x9f/0x120 [ 40.483266] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 40.483941] ? mtree_range_walk+0x632/0x900 [ 40.484547] ? mas_walk+0x5c7/0x7c0 [ 40.485072] do_vmi_munmap+0x1f1/0x2b0 [ 40.485619] mmap_region+0x1f9/0x2660 [ 40.486151] ? vm_mmap_pgoff+0x15c/0x3a0 [ 40.486719] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 40.487507] ? __pfx_lock_acquire+0x10/0x10 [ 40.488115] ? __pfx_mmap_region+0x10/0x10 [ 40.488704] ? security_mmap_addr+0x7d/0xa0 [ 40.489290] ? get_unmapped_area+0x1f5/0x3f0 [ 40.489893] do_mmap+0x854/0xf00 [ 40.490378] vm_mmap_pgoff+0x1a6/0x3a0 [ 40.490920] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 40.491540] ksys_mmap_pgoff+0x3af/0x500 [ 40.492098] do_syscall_64+0x3f/0x90 [ 40.492622] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 40.493332] RIP: 0033:0x7fedd24b0d82 [ 40.493836] 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 [ 40.496170] RSP: 002b:00007ffddc340948 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 40.497165] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007fedd24b0d82 [ 40.498095] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007fedd18ea000 [ 40.499034] RBP: 00007fedd18ea000 R08: 0000000000000009 R09: 0000000000001000 [ 40.499981] R10: 0000000000000812 R11: 0000000000000206 R12: 000055b5f51fdd90 [ 40.500912] R13: 00007ffddc340960 R14: 00007ffddc340990 R15: 00007ffddc340cf0 [ 40.501858] [ 40.502180] [ 40.502419] Allocated by task 213: [ 40.502892] kasan_save_stack+0x22/0x50 [ 40.503446] kasan_set_track+0x25/0x30 [ 40.503994] __kasan_slab_alloc+0x59/0x70 [ 40.504574] kmem_cache_alloc+0x16b/0x370 [ 40.505143] vm_area_dup+0x20/0x160 [ 40.505651] __split_vma+0x170/0x950 [ 40.506168] split_vma+0xc6/0x110 [ 40.506650] mprotect_fixup+0x8d2/0xb30 [ 40.507204] do_mprotect_pkey+0x87e/0xd40 [ 40.507804] __x64_sys_mprotect+0x78/0xc0 [ 40.508374] do_syscall_64+0x3f/0x90 [ 40.508893] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 40.509608] [ 40.509848] Freed by task 213: [ 40.510284] kasan_save_stack+0x22/0x50 [ 40.510832] kasan_set_track+0x25/0x30 [ 40.511376] kasan_save_free_info+0x2b/0x50 [ 40.511965] __kasan_slab_free+0x10a/0x190 [ 40.512550] kmem_cache_free+0x10d/0x4d0 [ 40.513107] rcu_core+0x8c8/0x2860 [ 40.513595] __do_softirq+0x1b7/0x7d4 [ 40.514118] [ 40.514354] Last potentially related work creation: [ 40.514998] kasan_save_stack+0x22/0x50 [ 40.515550] __kasan_record_aux_stack+0x8e/0xa0 [ 40.516191] __call_rcu_common.constprop.0+0x6a/0xb90 [ 40.516903] remove_vma+0x139/0x170 [ 40.517405] do_vmi_align_munmap+0xd4a/0x11f0 [ 40.518021] do_vmi_munmap+0x1f1/0x2b0 [ 40.518552] __vm_munmap+0x138/0x3a0 [ 40.519071] __x64_sys_munmap+0x59/0x80 [ 40.519636] do_syscall_64+0x3f/0x90 [ 40.520160] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 40.520868] [ 40.521103] The buggy address belongs to the object at ffff88800c55a0e8 [ 40.521103] which belongs to the cache vm_area_struct of size 168 [ 40.522728] The buggy address is located 88 bytes inside of [ 40.522728] freed 168-byte region [ffff88800c55a0e8, ffff88800c55a190) [ 40.524288] [ 40.524528] The buggy address belongs to the physical page: [ 40.525261] page:00000000d6a9ca8c refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xc55a [ 40.526461] memcg:ffff88800f396601 [ 40.526932] flags: 0x100000000000200(slab|node=0|zone=1) [ 40.527647] page_type: 0xffffffff() [ 40.528147] raw: 0100000000000200 ffff88800879fc80 ffffea0000374d00 dead000000000002 [ 40.529163] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800f396601 [ 40.530166] page dumped because: kasan: bad access detected [ 40.530896] [ 40.531133] Memory state around the buggy address: [ 40.531796] ffff88800c55a000: fa fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 40.532736] ffff88800c55a080: fb fb fb fb fb fc fc fc fc fc fc fc fc fa fb fb [ 40.533685] >ffff88800c55a100: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 40.534625] ^ [ 40.535327] ffff88800c55a180: fb fb fc fc fc fc fc fc fc fc 00 00 00 00 00 00 [ 40.536276] ffff88800c55a200: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 fc [ 40.537220] ================================================================== [ 40.538649] Disabling lock debugging due to kernel taint [ 42.465122] BUG: Bad rss-counter state mm:000000001ad13cad type:MM_FILEPAGES val:33 [ 42.466067] BUG: Bad rss-counter state mm:000000001ad13cad type:MM_ANONPAGES val:22 [ 42.955884] BUG: Bad rss-counter state mm:0000000014c0696b type:MM_FILEPAGES val:33 [ 42.956650] BUG: Bad rss-counter state mm:0000000014c0696b type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:7286' (ECDSA) to the list of known hosts. 2023/06/20 03:57:07 fuzzer started 2023/06/20 03:57:08 dialing manager at localhost:44161 2023/06/20 03:57:08 checking machine... 2023/06/20 03:57:08 checking revisions... [ 43.616105] kmemleak: Automatic memory scanning thread ended 2023/06/20 03:57:08 testing simple program... [ 43.665289] cgroup: Unknown subsys name 'net' [ 43.699197] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 03:56:58 Registers: info registers vcpu 0 RAX=0000000000000000 RBX=0000000000000fe0 RCX=ffffffff8184cd5e RDX=ffff888015cab680 RSI=0000000000000000 RDI=0000000000000001 RBP=ffff8880143bb200 RSP=ffff88801ccc7cd0 R8 =0000000000000001 R9 =0000000000000000 R10=0000000000000000 R11=0000000000000000 R12=ffff8880143ba220 R13=0000000000000000 R14=0000000000000000 R15=ffffffff85d3ce80 RIP=ffffffff814c01fc 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 00007f7e865bd900 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=00007fff426f6000 CR3=0000000009494000 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=ffffed1001eb3df7 RBX=0000000000000282 RCX=0000000000000000 RDX=ffff88800f590000 RSI=ffffffff816513d8 RDI=ffff88801b823680 RBP=1ffff11001eb3df7 RSP=ffff88800f59efa8 R8 =0000000000000001 R9 =0000000000000000 R10=0000000000000000 R11=0000000000009293 R12=ffff88801b823680 R13=ffffffff816513d8 R14=0000000000000000 R15=0000000000000001 RIP=ffffffff812d8660 RFL=00000082 [--S----] 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=00005555900fc218 CR3=0000000009494000 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=000000000000004300000000000f0314 XMM02=00000000000000000000000000000000 XMM03=000000000000001d00000000000f031a XMM04=000000000000003000000000000f0330 XMM05=00000000000000000000000000000000 XMM06=000000000000001d00000000000f0321 XMM07=00000000000000000000000000000000 XMM08=01000000000000000000000000000001 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000