syzkaller login: [ 38.286635] BUG: Bad rss-counter state mm:00000000d3eaccde type:MM_FILEPAGES val:33 [ 38.288802] BUG: Bad rss-counter state mm:00000000d3eaccde type:MM_ANONPAGES val:22 [ 38.460514] ================================================================== [ 38.461658] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 38.462929] Read of size 8 at addr ffff88800ea6b798 by task sshd/219 [ 38.463792] [ 38.464013] CPU: 1 PID: 219 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 38.464947] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 38.465966] Call Trace: [ 38.466300] [ 38.466617] dump_stack_lvl+0x91/0xf0 [ 38.467113] print_report+0xcc/0x620 [ 38.467616] ? __virt_addr_valid+0x102/0x340 [ 38.468194] ? vma_interval_tree_remove+0xc75/0xec0 [ 38.468834] ? vma_interval_tree_remove+0xc75/0xec0 [ 38.469488] kasan_report+0xbe/0xf0 [ 38.469968] ? vma_interval_tree_remove+0xc75/0xec0 [ 38.470629] vma_interval_tree_remove+0xc75/0xec0 [ 38.471234] vma_prepare+0xc54/0x11a0 [ 38.471739] __split_vma+0x5af/0x950 [ 38.472241] ? __pfx___split_vma+0x10/0x10 [ 38.472794] ? find_held_lock+0x2c/0x110 [ 38.473323] do_vmi_align_munmap+0x2ba/0x11f0 [ 38.473908] ? lock_is_held_type+0x9f/0x120 [ 38.474473] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 38.475112] ? mtree_range_walk+0x632/0x900 [ 38.475693] ? mas_walk+0x5c7/0x7c0 [ 38.476179] do_vmi_munmap+0x1f1/0x2b0 [ 38.476698] mmap_region+0x1f9/0x2660 [ 38.477184] ? vm_mmap_pgoff+0x15c/0x3a0 [ 38.477722] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 38.478455] ? __pfx_lock_acquire+0x10/0x10 [ 38.478991] ? __pfx_mmap_region+0x10/0x10 [ 38.479553] ? security_mmap_addr+0x7d/0xa0 [ 38.480095] ? get_unmapped_area+0x1f5/0x3f0 [ 38.480682] do_mmap+0x854/0xf00 [ 38.481125] vm_mmap_pgoff+0x1a6/0x3a0 [ 38.481647] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 38.482217] ksys_mmap_pgoff+0x3af/0x500 [ 38.482757] do_syscall_64+0x3f/0x90 [ 38.483239] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 38.483898] RIP: 0033:0x7f6bfa08cd82 [ 38.484393] 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 [ 38.486617] RSP: 002b:00007ffd269b5068 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 38.487612] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f6bfa08cd82 [ 38.488574] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f6bf94c6000 [ 38.489500] RBP: 00007f6bf94c6000 R08: 0000000000000009 R09: 0000000000001000 [ 38.490410] R10: 0000000000000812 R11: 0000000000000206 R12: 000055bcda81dec0 [ 38.491295] R13: 00007ffd269b5080 R14: 00007ffd269b50b0 R15: 00007ffd269b5410 [ 38.492187] [ 38.492513] [ 38.492730] Allocated by task 212: [ 38.493157] kasan_save_stack+0x22/0x50 [ 38.493687] kasan_set_track+0x25/0x30 [ 38.494197] __kasan_slab_alloc+0x59/0x70 [ 38.494756] kmem_cache_alloc+0x16b/0x370 [ 38.495281] vm_area_dup+0x20/0x160 [ 38.495758] __split_vma+0x170/0x950 [ 38.496257] split_vma+0xc6/0x110 [ 38.496723] mprotect_fixup+0x8d2/0xb30 [ 38.497245] do_mprotect_pkey+0x87e/0xd40 [ 38.497791] __x64_sys_mprotect+0x78/0xc0 [ 38.498329] do_syscall_64+0x3f/0x90 [ 38.498826] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 38.499491] [ 38.499717] Freed by task 212: [ 38.500131] kasan_save_stack+0x22/0x50 [ 38.500714] kasan_set_track+0x25/0x30 [ 38.501217] kasan_save_free_info+0x2b/0x50 [ 38.501774] __kasan_slab_free+0x10a/0x190 [ 38.502396] kmem_cache_free+0x10d/0x4d0 [ 38.502952] rcu_core+0x8c8/0x2860 [ 38.503539] __do_softirq+0x1b7/0x7d4 [ 38.504030] [ 38.504271] Last potentially related work creation: [ 38.504989] kasan_save_stack+0x22/0x50 [ 38.505635] __kasan_record_aux_stack+0x8e/0xa0 [ 38.506348] __call_rcu_common.constprop.0+0x6a/0xb90 [ 38.507124] remove_vma+0x139/0x170 [ 38.507683] do_vmi_align_munmap+0xd4a/0x11f0 [ 38.508413] do_vmi_munmap+0x1f1/0x2b0 [ 38.509032] __vm_munmap+0x138/0x3a0 [ 38.509628] __x64_sys_munmap+0x59/0x80 [ 38.510242] do_syscall_64+0x3f/0x90 [ 38.510824] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 38.511616] [ 38.511880] The buggy address belongs to the object at ffff88800ea6b740 [ 38.511880] which belongs to the cache vm_area_struct of size 168 [ 38.513735] The buggy address is located 88 bytes inside of [ 38.513735] freed 168-byte region [ffff88800ea6b740, ffff88800ea6b7e8) [ 38.515467] [ 38.515729] The buggy address belongs to the physical page: [ 38.516530] page:00000000cd6c85b2 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xea6b [ 38.517874] memcg:ffff8880097d9101 [ 38.518401] anon flags: 0x100000000000200(slab|node=0|zone=1) [ 38.519303] page_type: 0xffffffff() [ 38.519887] raw: 0100000000000200 ffff88800879fc80 0000000000000000 dead000000000001 [ 38.521096] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff8880097d9101 [ 38.522294] page dumped because: kasan: bad access detected [ 38.523141] [ 38.523402] Memory state around the buggy address: [ 38.524113] ffff88800ea6b680: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 38.525194] ffff88800ea6b700: fc fc fc fc fc fc fc fc fa fb fb fb fb fb fb fb [ 38.526231] >ffff88800ea6b780: fb fb fb fb fb fb fb fb fb fb fb fb fb fc fc fc [ 38.527279] ^ [ 38.527871] ffff88800ea6b800: fc fc fc fc fc 00 00 00 00 00 00 00 00 00 00 00 [ 38.528923] ffff88800ea6b880: 00 00 00 00 00 00 00 00 00 00 fc fc fc fc fc fc [ 38.529971] ================================================================== [ 38.531562] Disabling lock debugging due to kernel taint [ 40.631997] BUG: Bad rss-counter state mm:0000000046d69120 type:MM_FILEPAGES val:33 [ 40.633549] BUG: Bad rss-counter state mm:0000000046d69120 type:MM_ANONPAGES val:22 [ 41.158353] BUG: Bad rss-counter state mm:00000000eb4c2d48 type:MM_FILEPAGES val:33 [ 41.159583] BUG: Bad rss-counter state mm:00000000eb4c2d48 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:13753' (ECDSA) to the list of known hosts. 2023/06/19 19:24:59 fuzzer started 2023/06/19 19:24:59 dialing manager at localhost:44161 2023/06/19 19:24:59 checking machine... 2023/06/19 19:24:59 checking revisions... [ 41.917977] kmemleak: Automatic memory scanning thread ended 2023/06/19 19:25:00 testing simple program... [ 41.964675] cgroup: Unknown subsys name 'net' [ 42.018767] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 19:24:56 Registers: info registers vcpu 0 RAX=ffff88800844f140 RBX=0000000000000001 RCX=0000000000000001 RDX=ffff888014787601 RSI=ffff888014787698 RDI=ffff888014787698 RBP=ffff888014787260 RSP=ffff888014787198 R8 =0000000000000001 R9 =ffff888014787248 R10=0000000000038001 R11=0000000000020cf8 R12=ffff888014787268 R13=ffff888014787250 R14=ffff888014787698 R15=ffff888014787208 RIP=ffffffff81131236 RFL=00000202 [-------] 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 00007f702a1e3900 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=00007f7029703000 CR3=0000000010212000 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=756f6a2f646d65747379732f6e75722f XMM01=00676f6c7379732f6c616e72756f6a2f XMM02=756f6a2f646d65747379732f6e75722f XMM03=006c616e72756f6a2f646d6574737973 XMM04=e40be7382ac4a5ca00000000000ae988 XMM05=09d0a0a5a0f0f6ca0000000000134d68 XMM06=dfcdbad4f1609c3700000000001338b0 XMM07=fb795ef6d65770560000000000124088 XMM08=4f5453444600273d67736d000d0a0920 XMM09=00000000000000000000000000000000 XMM10=20200000000020202020202020200000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=1ffffffff0c7b967 RBX=0000000000000001 RCX=ffffffff863dcb36 RDX=0000000000000000 RSI=dffffc0000000000 RDI=ffffffff863dcb38 RBP=ffff88800c6d74b0 RSP=ffff88800c6d73e8 R8 =ffffffff863dcb3a R9 =ffff88800c6d7498 R10=0000000000038001 R11=0000000000091be7 R12=ffff88800c6d74b8 R13=ffff88800c6d74a0 R14=ffff88800c6d7ce0 R15=ffff88800c6d7458 RIP=ffffffff811311c7 RFL=00000212 [----A--] 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 00007ff483f5a900 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=00007ffe3d145000 CR3=0000000014672000 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=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