syzkaller login: [ 30.492889] BUG: Bad rss-counter state mm:00000000297ac68d type:MM_FILEPAGES val:33 [ 30.494128] BUG: Bad rss-counter state mm:00000000297ac68d type:MM_ANONPAGES val:22 [ 30.658419] ================================================================== [ 30.659370] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 30.660318] Read of size 8 at addr ffff88801a5bfa50 by task sshd/220 [ 30.661096] [ 30.661322] CPU: 1 PID: 220 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 30.662371] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 30.663373] Call Trace: [ 30.663699] [ 30.663985] dump_stack_lvl+0x91/0xf0 [ 30.664477] print_report+0xcc/0x620 [ 30.664968] ? __virt_addr_valid+0x102/0x340 [ 30.665536] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.666159] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.666794] kasan_report+0xbe/0xf0 [ 30.667273] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.667915] vma_interval_tree_remove+0xc75/0xec0 [ 30.668530] vma_prepare+0xc54/0x11a0 [ 30.669016] __split_vma+0x5af/0x950 [ 30.669487] ? __pfx___split_vma+0x10/0x10 [ 30.670023] ? find_held_lock+0x2c/0x110 [ 30.670565] do_vmi_align_munmap+0x2ba/0x11f0 [ 30.671142] ? lock_is_held_type+0x9f/0x120 [ 30.671684] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 30.672292] ? mtree_range_walk+0x632/0x900 [ 30.672846] ? mas_walk+0x5c7/0x7c0 [ 30.673330] do_vmi_munmap+0x1f1/0x2b0 [ 30.673837] mmap_region+0x1f9/0x2660 [ 30.674328] ? vm_mmap_pgoff+0x15c/0x3a0 [ 30.674878] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 30.675591] ? __pfx_lock_acquire+0x10/0x10 [ 30.676143] ? __pfx_mmap_region+0x10/0x10 [ 30.676685] ? security_mmap_addr+0x7d/0xa0 [ 30.677221] ? get_unmapped_area+0x1f5/0x3f0 [ 30.677783] do_mmap+0x854/0xf00 [ 30.678225] vm_mmap_pgoff+0x1a6/0x3a0 [ 30.678740] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 30.679304] ksys_mmap_pgoff+0x3af/0x500 [ 30.679817] do_syscall_64+0x3f/0x90 [ 30.680300] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.680951] RIP: 0033:0x7f5ec7b3cd82 [ 30.681413] 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 [ 30.683549] RSP: 002b:00007ffc25453848 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 30.684458] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f5ec7b3cd82 [ 30.685304] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f5ec6f76000 [ 30.686151] RBP: 00007f5ec6f76000 R08: 0000000000000009 R09: 0000000000001000 [ 30.687021] R10: 0000000000000812 R11: 0000000000000206 R12: 00005640b0649f70 [ 30.687871] R13: 00007ffc25453860 R14: 00007ffc25453890 R15: 00007ffc25453bf0 [ 30.688733] [ 30.689026] [ 30.689241] Allocated by task 213: [ 30.689665] kasan_save_stack+0x22/0x50 [ 30.690172] kasan_set_track+0x25/0x30 [ 30.690684] __kasan_slab_alloc+0x59/0x70 [ 30.691207] kmem_cache_alloc+0x16b/0x370 [ 30.691726] vm_area_dup+0x20/0x160 [ 30.692181] __split_vma+0x170/0x950 [ 30.692647] split_vma+0xc6/0x110 [ 30.693086] mprotect_fixup+0x8d2/0xb30 [ 30.693589] do_mprotect_pkey+0x87e/0xd40 [ 30.694110] __x64_sys_mprotect+0x78/0xc0 [ 30.694644] do_syscall_64+0x3f/0x90 [ 30.695117] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.695768] [ 30.695985] Freed by task 213: [ 30.696378] kasan_save_stack+0x22/0x50 [ 30.696884] kasan_set_track+0x25/0x30 [ 30.697381] kasan_save_free_info+0x2b/0x50 [ 30.697929] __kasan_slab_free+0x10a/0x190 [ 30.698462] kmem_cache_free+0x10d/0x4d0 [ 30.698990] rcu_core+0x8c8/0x2860 [ 30.699444] __do_softirq+0x1b7/0x7d4 [ 30.699927] [ 30.700143] Last potentially related work creation: [ 30.700731] kasan_save_stack+0x22/0x50 [ 30.701242] __kasan_record_aux_stack+0x8e/0xa0 [ 30.701830] __call_rcu_common.constprop.0+0x6a/0xb90 [ 30.702478] remove_vma+0x139/0x170 [ 30.703026] do_vmi_align_munmap+0xd4a/0x11f0 [ 30.703597] do_vmi_munmap+0x1f1/0x2b0 [ 30.704088] __vm_munmap+0x138/0x3a0 [ 30.704559] __x64_sys_munmap+0x59/0x80 [ 30.705058] do_syscall_64+0x3f/0x90 [ 30.705536] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.706183] [ 30.706404] The buggy address belongs to the object at ffff88801a5bf9f8 [ 30.706404] which belongs to the cache vm_area_struct of size 168 [ 30.707885] The buggy address is located 88 bytes inside of [ 30.707885] freed 168-byte region [ffff88801a5bf9f8, ffff88801a5bfaa0) [ 30.709286] [ 30.709501] The buggy address belongs to the physical page: [ 30.710162] page:00000000c03deedc refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x1a5bf [ 30.711270] memcg:ffff888015fc5601 [ 30.711693] flags: 0x100000000000200(slab|node=0|zone=1) [ 30.712339] page_type: 0xffffffff() [ 30.712798] raw: 0100000000000200 ffff8880087a0c80 dead000000000122 0000000000000000 [ 30.713719] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff888015fc5601 [ 30.714641] page dumped because: kasan: bad access detected [ 30.715300] [ 30.715521] Memory state around the buggy address: [ 30.716093] ffff88801a5bf900: fc fc 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 30.716945] ffff88801a5bf980: 00 00 00 00 00 00 00 fc fc fc fc fc fc fc fc fa [ 30.717798] >ffff88801a5bfa00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 30.718662] ^ [ 30.719358] ffff88801a5bfa80: fb fb fb fb fc fc fc fc fc fc fc fc fa fb fb fb [ 30.720214] ffff88801a5bfb00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 30.721057] ================================================================== [ 30.721974] Disabling lock debugging due to kernel taint [ 33.208425] BUG: Bad rss-counter state mm:000000009351dc1e type:MM_FILEPAGES val:33 [ 33.209360] BUG: Bad rss-counter state mm:000000009351dc1e type:MM_ANONPAGES val:22 [ 33.674971] BUG: Bad rss-counter state mm:0000000041c6dda6 type:MM_FILEPAGES val:33 [ 33.676001] BUG: Bad rss-counter state mm:0000000041c6dda6 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:49568' (ECDSA) to the list of known hosts. 2023/06/21 03:13:56 fuzzer started 2023/06/21 03:13:56 dialing manager at localhost:36067 2023/06/21 03:13:56 checking machine... 2023/06/21 03:13:56 checking revisions... [ 34.404447] kmemleak: Automatic memory scanning thread ended 2023/06/21 03:13:56 testing simple program... [ 34.455117] cgroup: Unknown subsys name 'net' [ 34.515712] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 03:13:55 Registers: info registers vcpu 0 RAX=dffffc0000000000 RBX=ffffffff8120686f RCX=0000000000000001 RDX=1ffff110011b3f31 RSI=ffff888008d9fef0 RDI=ffffffff8120686f RBP=ffffffff8120686f RSP=ffff888008d9f8e0 R8 =0000000000000001 R9 =ffff888008d9f970 R10=0000000000038001 R11=000000000000a20c R12=0000000000000001 R13=0000000000000000 R14=ffff888008d90000 R15=ffff88800d979600 RIP=ffffffff811fc772 RFL=00000287 [--S--PC] 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=00007f1d2b88d000 CR3=000000000ff34000 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=2035353a33313a3330203132206e754a XMM01=6964206465766965636552203a5d3932 XMM02=6f63736964203a31313a363234333520 XMM03=7266207463656e6e6f63736964206465 XMM04=69662068637573206f4e203a656c6163 XMM05=3a656c696620766e65206e65706f206f XMM06=65733a6468737328766e655f6d617020 XMM07=6b7a79732035353a33313a3330203132 XMM08=3d656e696c646d632022656369767265 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=0000000080000001 RBX=ffff88800d7174b0 RCX=0000000000000000 RDX=ffff88800f2b3680 RSI=ffffffff8386970c RDI=0000000000000001 RBP=ffff8880168d7c48 RSP=ffff8880168d7b20 R8 =0000000000000001 R9 =0000000000000000 R10=0000000000000001 R11=0000000000000000 R12=0000000000000001 R13=00000000000000e5 R14=ffff888008fe8000 R15=ffff88800d717400 RIP=ffffffff814c0880 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 00007fb6fd5f6900 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=00007fb6fdbad618 CR3=0000000019f6e000 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=6e69676f6c5f6d61702c78756e696c65 XMM02=755f6d61702c74696d7265705f6d6170 XMM03=2c766e655f6d61702c7374696d696c5f XMM04=6d61702c766e655f6d61702c7374696d XMM05=78696e755f6d61702c74696d7265705f XMM06=6469756e69676f6c5f6d61702c78756e XMM07=672065736f6c635f6e6f69737365733a XMM08=61662029286e65706f5f746964756100 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000