syzkaller login: [ 35.740141] BUG: Bad rss-counter state mm:00000000539ec648 type:MM_FILEPAGES val:33 [ 35.740931] BUG: Bad rss-counter state mm:00000000539ec648 type:MM_ANONPAGES val:22 [ 35.896682] ================================================================== [ 35.897743] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 35.898839] Read of size 8 at addr ffff88800fa53880 by task sshd/220 [ 35.899860] [ 35.900115] CPU: 0 PID: 220 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 35.901020] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 35.901994] Call Trace: [ 35.902314] [ 35.902598] dump_stack_lvl+0x91/0xf0 [ 35.903087] print_report+0xcc/0x620 [ 35.903571] ? __virt_addr_valid+0x102/0x340 [ 35.904119] ? vma_interval_tree_remove+0xc75/0xec0 [ 35.904743] ? vma_interval_tree_remove+0xc75/0xec0 [ 35.905360] kasan_report+0xbe/0xf0 [ 35.905832] ? vma_interval_tree_remove+0xc75/0xec0 [ 35.906456] vma_interval_tree_remove+0xc75/0xec0 [ 35.907055] vma_prepare+0xc54/0x11a0 [ 35.907534] __split_vma+0x5af/0x950 [ 35.908010] ? __pfx___split_vma+0x10/0x10 [ 35.908567] ? find_held_lock+0x2c/0x110 [ 35.909089] do_vmi_align_munmap+0x2ba/0x11f0 [ 35.909659] ? lock_is_held_type+0x9f/0x120 [ 35.910195] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 35.910802] ? mtree_range_walk+0x632/0x900 [ 35.911358] ? mas_walk+0x5c7/0x7c0 [ 35.911825] do_vmi_munmap+0x1f1/0x2b0 [ 35.912322] mmap_region+0x1f9/0x2660 [ 35.912807] ? vm_mmap_pgoff+0x15c/0x3a0 [ 35.913317] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 35.914034] ? __pfx_lock_acquire+0x10/0x10 [ 35.914567] ? __pfx_mmap_region+0x10/0x10 [ 35.915094] ? security_mmap_addr+0x7d/0xa0 [ 35.915629] ? get_unmapped_area+0x1f5/0x3f0 [ 35.916187] do_mmap+0x854/0xf00 [ 35.916622] vm_mmap_pgoff+0x1a6/0x3a0 [ 35.917120] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 35.917685] ksys_mmap_pgoff+0x3af/0x500 [ 35.918195] do_syscall_64+0x3f/0x90 [ 35.918674] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 35.919323] RIP: 0033:0x7fe0e69e5d82 [ 35.919785] 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 [ 35.921919] RSP: 002b:00007ffff1ba9b48 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 35.922824] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007fe0e69e5d82 [ 35.923665] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007fe0e5e1f000 [ 35.924516] RBP: 00007fe0e5e1f000 R08: 0000000000000009 R09: 0000000000001000 [ 35.925353] R10: 0000000000000812 R11: 0000000000000206 R12: 000055cba7f1ab20 [ 35.926193] R13: 00007ffff1ba9b60 R14: 00007ffff1ba9b90 R15: 00007ffff1ba9ef0 [ 35.927050] [ 35.927338] [ 35.927550] Allocated by task 213: [ 35.927975] kasan_save_stack+0x22/0x50 [ 35.928502] kasan_set_track+0x25/0x30 [ 35.928995] __kasan_slab_alloc+0x59/0x70 [ 35.929511] kmem_cache_alloc+0x16b/0x370 [ 35.930027] vm_area_dup+0x20/0x160 [ 35.930481] __split_vma+0x170/0x950 [ 35.930947] split_vma+0xc6/0x110 [ 35.931387] mprotect_fixup+0x8d2/0xb30 [ 35.931896] do_mprotect_pkey+0x87e/0xd40 [ 35.932422] __x64_sys_mprotect+0x78/0xc0 [ 35.932943] do_syscall_64+0x3f/0x90 [ 35.933416] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 35.934057] [ 35.934270] Freed by task 213: [ 35.934664] kasan_save_stack+0x22/0x50 [ 35.935170] kasan_set_track+0x25/0x30 [ 35.935667] kasan_save_free_info+0x2b/0x50 [ 35.936212] __kasan_slab_free+0x10a/0x190 [ 35.936747] kmem_cache_free+0x10d/0x4d0 [ 35.937254] rcu_core+0x8c8/0x2860 [ 35.937695] __do_softirq+0x1b7/0x7d4 [ 35.938175] [ 35.938389] Last potentially related work creation: [ 35.938971] kasan_save_stack+0x22/0x50 [ 35.939476] __kasan_record_aux_stack+0x8e/0xa0 [ 35.940055] __call_rcu_common.constprop.0+0x6a/0xb90 [ 35.940713] remove_vma+0x139/0x170 [ 35.941162] do_vmi_align_munmap+0xd4a/0x11f0 [ 35.941723] do_vmi_munmap+0x1f1/0x2b0 [ 35.942212] __vm_munmap+0x138/0x3a0 [ 35.942679] __x64_sys_munmap+0x59/0x80 [ 35.943174] do_syscall_64+0x3f/0x90 [ 35.943647] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 35.944305] [ 35.944519] The buggy address belongs to the object at ffff88800fa53828 [ 35.944519] which belongs to the cache vm_area_struct of size 168 [ 35.945980] The buggy address is located 88 bytes inside of [ 35.945980] freed 168-byte region [ffff88800fa53828, ffff88800fa538d0) [ 35.947373] [ 35.947587] The buggy address belongs to the physical page: [ 35.948248] page:00000000a7e2413e refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xfa53 [ 35.949329] memcg:ffff88800e7bef01 [ 35.949757] anon flags: 0x100000000000200(slab|node=0|zone=1) [ 35.950459] page_type: 0xffffffff() [ 35.950908] raw: 0100000000000200 ffff88800879fc80 ffffea000035f7c0 dead000000000005 [ 35.951821] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800e7bef01 [ 35.952735] page dumped because: kasan: bad access detected [ 35.953445] [ 35.953671] Memory state around the buggy address: [ 35.954281] ffff88800fa53780: fb fb fb fb fb fb fb fb fb fb fb fb fb fc fc fc [ 35.955163] ffff88800fa53800: fc fc fc fc fc fa fb fb fb fb fb fb fb fb fb fb [ 35.956017] >ffff88800fa53880: fb fb fb fb fb fb fb fb fb fb fc fc fc fc fc fc [ 35.956885] ^ [ 35.957291] ffff88800fa53900: fc fc fa fb fb fb fb fb fb fb fb fb fb fb fb fb [ 35.958150] ffff88800fa53980: fb fb fb fb fb fb fb fc fc fc fc fc fc fc fc 00 [ 35.959008] ================================================================== [ 35.960018] Disabling lock debugging due to kernel taint [ 37.914830] BUG: Bad rss-counter state mm:00000000f1d1805a type:MM_FILEPAGES val:33 [ 37.916341] BUG: Bad rss-counter state mm:00000000f1d1805a type:MM_ANONPAGES val:22 [ 38.403715] BUG: Bad rss-counter state mm:0000000077c6fd96 type:MM_FILEPAGES val:33 [ 38.405175] BUG: Bad rss-counter state mm:0000000077c6fd96 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:47625' (ECDSA) to the list of known hosts. 2023/06/19 22:10:19 fuzzer started 2023/06/19 22:10:20 dialing manager at localhost:44161 2023/06/19 22:10:20 checking machine... 2023/06/19 22:10:20 checking revisions... [ 39.150289] kmemleak: Automatic memory scanning thread ended 2023/06/19 22:10:20 testing simple program... [ 39.188810] cgroup: Unknown subsys name 'net' [ 39.236066] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 22:10:14 Registers: info registers vcpu 0 RAX=dffffc0000000000 RBX=ffffffff8542a6c0 RCX=0000000000000100 RDX=0000000000000000 RSI=ffffffff814c83e7 RDI=ffffffff8542aab4 RBP=ffffffff8542a6c0 RSP=ffff88806ce09a10 R8 =0000000000000000 R9 =fffffbfff0ba77da R10=ffffffff85d3bed7 R11=00000000000b5420 R12=ffffffff86605df9 R13=0000000000000000 R14=ffffffff8542a6c0 R15=ffff8880181f9a00 RIP=ffffffff8135bd88 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=00007f227c138c20 CR3=0000000016cb8000 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=2039313a30313a3232203931206e754a XMM01=73732878696e755f6d6170203a5d3932 XMM02=65736f6c63206e6f6973736573203a29 XMM03=755f6d6170203a5d3932325b64687373 XMM04=69662068637573206f4e203a656c6163 XMM05=3a656c696620766e65206e65706f206f XMM06=65733a6468737328766e655f6d617020 XMM07=6b7a79732039313a30313a3232203931 XMM08=3d656e696c646d632022656369767265 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=dffffc0000000000 RBX=ffff88806cf35000 RCX=ffffffff812d8ec3 RDX=0000000000000000 RSI=0000000000000008 RDI=ffffffff85d3bed0 RBP=0000000000000000 RSP=ffff888016f56e28 R8 =0000000000000000 R9 =fffffbfff0ba77da R10=ffffffff85d3bed7 R11=00000000000b6996 R12=0000000000000002 R13=0000000000000000 R14=ffffffff8560b640 R15=0000000000000000 RIP=ffffffff8135b910 RFL=00000216 [----AP-] 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 00007feb867c8900 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=00007feb8678d008 CR3=000000000ed38000 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=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