syzkaller login: [ 30.449642] BUG: Bad rss-counter state mm:00000000b6a5ff8f type:MM_FILEPAGES val:33 [ 30.450418] BUG: Bad rss-counter state mm:00000000b6a5ff8f type:MM_ANONPAGES val:22 [ 30.645867] ================================================================== [ 30.646536] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 30.647209] Read of size 8 at addr ffff88800eedc798 by task sshd/220 [ 30.647779] [ 30.647944] CPU: 0 PID: 220 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 30.648589] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 30.649315] Call Trace: [ 30.649544] [ 30.649751] dump_stack_lvl+0x91/0xf0 [ 30.650113] print_report+0xcc/0x620 [ 30.650469] ? __virt_addr_valid+0x102/0x340 [ 30.650888] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.651347] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.651811] kasan_report+0xbe/0xf0 [ 30.652189] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.652781] vma_interval_tree_remove+0xc75/0xec0 [ 30.653252] vma_prepare+0xc54/0x11a0 [ 30.653622] __split_vma+0x5af/0x950 [ 30.653978] ? __pfx___split_vma+0x10/0x10 [ 30.654384] ? find_held_lock+0x2c/0x110 [ 30.654774] do_vmi_align_munmap+0x2ba/0x11f0 [ 30.655184] ? lock_is_held_type+0x9f/0x120 [ 30.655593] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 30.656026] ? mtree_range_walk+0x632/0x900 [ 30.656447] ? mas_walk+0x5c7/0x7c0 [ 30.656794] do_vmi_munmap+0x1f1/0x2b0 [ 30.657159] mmap_region+0x1f9/0x2660 [ 30.657521] ? vm_mmap_pgoff+0x15c/0x3a0 [ 30.657905] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 30.658453] ? __pfx_lock_acquire+0x10/0x10 [ 30.659036] ? __pfx_mmap_region+0x10/0x10 [ 30.659431] ? security_mmap_addr+0x7d/0xa0 [ 30.659827] ? get_unmapped_area+0x1f5/0x3f0 [ 30.660252] do_mmap+0x854/0xf00 [ 30.660579] vm_mmap_pgoff+0x1a6/0x3a0 [ 30.660958] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 30.661364] ksys_mmap_pgoff+0x3af/0x500 [ 30.661759] do_syscall_64+0x3f/0x90 [ 30.662117] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.662615] RIP: 0033:0x7f3456e9ed82 [ 30.662952] 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 [ 30.664541] RSP: 002b:00007ffd7d2c2128 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 30.665202] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f3456e9ed82 [ 30.665815] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f34562d8000 [ 30.666445] RBP: 00007f34562d8000 R08: 0000000000000009 R09: 0000000000001000 [ 30.667071] R10: 0000000000000812 R11: 0000000000000206 R12: 000055577c39eec0 [ 30.667683] R13: 00007ffd7d2c2140 R14: 00007ffd7d2c2170 R15: 00007ffd7d2c24d0 [ 30.668334] [ 30.668560] [ 30.668722] Allocated by task 213: [ 30.669050] kasan_save_stack+0x22/0x50 [ 30.669453] kasan_set_track+0x25/0x30 [ 30.669820] __kasan_slab_alloc+0x59/0x70 [ 30.670207] kmem_cache_alloc+0x16b/0x370 [ 30.670578] vm_area_dup+0x20/0x160 [ 30.670919] __split_vma+0x170/0x950 [ 30.671268] split_vma+0xc6/0x110 [ 30.671636] mprotect_fixup+0x8d2/0xb30 [ 30.672009] do_mprotect_pkey+0x87e/0xd40 [ 30.672411] __x64_sys_mprotect+0x78/0xc0 [ 30.672795] do_syscall_64+0x3f/0x90 [ 30.673144] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.673634] [ 30.673791] Freed by task 13: [ 30.674073] kasan_save_stack+0x22/0x50 [ 30.674440] kasan_set_track+0x25/0x30 [ 30.674806] kasan_save_free_info+0x2b/0x50 [ 30.675191] __kasan_slab_free+0x10a/0x190 [ 30.675579] kmem_cache_free+0x10d/0x4d0 [ 30.675964] rcu_core+0x8c8/0x2860 [ 30.676303] __do_softirq+0x1b7/0x7d4 [ 30.676656] [ 30.676824] Last potentially related work creation: [ 30.677250] kasan_save_stack+0x22/0x50 [ 30.677626] __kasan_record_aux_stack+0x8e/0xa0 [ 30.678036] __call_rcu_common.constprop.0+0x6a/0xb90 [ 30.678523] remove_vma+0x139/0x170 [ 30.678858] do_vmi_align_munmap+0xd4a/0x11f0 [ 30.679274] do_vmi_munmap+0x1f1/0x2b0 [ 30.679626] __vm_munmap+0x138/0x3a0 [ 30.679964] __x64_sys_munmap+0x59/0x80 [ 30.680365] do_syscall_64+0x3f/0x90 [ 30.680717] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.681193] [ 30.681347] Second to last potentially related work creation: [ 30.681840] kasan_save_stack+0x22/0x50 [ 30.682206] __kasan_record_aux_stack+0x8e/0xa0 [ 30.682616] __call_rcu_common.constprop.0+0x6a/0xb90 [ 30.683092] remove_vma+0x139/0x170 [ 30.683418] do_vmi_align_munmap+0xd4a/0x11f0 [ 30.683831] do_vmi_munmap+0x1f1/0x2b0 [ 30.684199] mmap_region+0x1f9/0x2660 [ 30.684577] do_mmap+0x854/0xf00 [ 30.684895] vm_mmap_pgoff+0x1a6/0x3a0 [ 30.685331] ksys_mmap_pgoff+0x3af/0x500 [ 30.685780] do_syscall_64+0x3f/0x90 [ 30.686121] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.686577] [ 30.686728] The buggy address belongs to the object at ffff88800eedc740 [ 30.686728] which belongs to the cache vm_area_struct of size 168 [ 30.687811] The buggy address is located 88 bytes inside of [ 30.687811] freed 168-byte region [ffff88800eedc740, ffff88800eedc7e8) [ 30.688882] [ 30.689044] The buggy address belongs to the physical page: [ 30.689528] page:0000000036b8ff7b refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xeedc [ 30.690326] memcg:ffff88800ce47b01 [ 30.690640] flags: 0x100000000000200(slab|node=0|zone=1) [ 30.691128] page_type: 0xffffffff() [ 30.691456] raw: 0100000000000200 ffff8880087a0c80 ffffea000031a5c0 dead000000000006 [ 30.692143] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800ce47b01 [ 30.692805] page dumped because: kasan: bad access detected [ 30.693275] [ 30.693441] Memory state around the buggy address: [ 30.693890] ffff88800eedc680: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 30.694523] ffff88800eedc700: fc fc fc fc fc fc fc fc fa fb fb fb fb fb fb fb [ 30.695140] >ffff88800eedc780: fb fb fb fb fb fb fb fb fb fb fb fb fb fc fc fc [ 30.695763] ^ [ 30.696172] ffff88800eedc800: fc fc fc fc fc 00 00 00 00 00 00 00 00 00 00 00 [ 30.696829] ffff88800eedc880: 00 00 00 00 00 00 00 00 00 00 fc fc fc fc fc fc [ 30.697493] ================================================================== [ 30.698314] Disabling lock debugging due to kernel taint [ 32.198128] BUG: Bad rss-counter state mm:000000007710cdc4 type:MM_FILEPAGES val:33 [ 32.198847] BUG: Bad rss-counter state mm:000000007710cdc4 type:MM_ANONPAGES val:22 [ 32.564977] BUG: Bad rss-counter state mm:000000000bcdfcac type:MM_FILEPAGES val:33 [ 32.565701] BUG: Bad rss-counter state mm:000000000bcdfcac type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:57173' (ECDSA) to the list of known hosts. 2023/06/21 09:09:30 fuzzer started 2023/06/21 09:09:30 dialing manager at localhost:36067 2023/06/21 09:09:30 checking machine... 2023/06/21 09:09:30 checking revisions... [ 33.157001] kmemleak: Automatic memory scanning thread ended 2023/06/21 09:09:30 testing simple program... [ 33.199961] cgroup: Unknown subsys name 'net' [ 33.234437] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 09:09:30 Registers: info registers vcpu 0 RAX=1ffffffff0c1b04a RBX=0000000000000001 RCX=ffffffff860d8256 RDX=dffffc0000000000 RSI=0000000000000000 RDI=0000000000000001 RBP=ffff8880100179e0 RSP=ffff888010017918 R8 =ffffffff860d825a R9 =ffff8880100179c8 R10=0000000000038001 R11=0000000000010b8d R12=ffff8880100179e8 R13=ffff8880100179d0 R14=ffff888010017a30 R15=ffff888010017988 RIP=ffffffff81130b73 RFL=00000213 [----A-C] 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 00007f99d5148900 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=00007ffd5de0f000 CR3=000000000de76000 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=1ffff110019e1839 RBX=ffff88800cf0c198 RCX=ffffffff84536871 RDX=0000000000000000 RSI=0000000000000000 RDI=ffff88800cf0c1c8 RBP=ffff88800cdec2b8 RSP=ffff88806cf09db8 R8 =0000000000000001 R9 =fffffbfff0adb094 R10=ffffffff856d84a3 R11=0000000000000000 R12=dffffc0000000000 R13=ffff88800cdeaa00 R14=ffffffff8186b835 R15=ffff88800cd76200 RIP=ffffffff818464e2 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=00007efdfc514000 CR3=00000000158a4000 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=2039323a39303a3930203132206e754a XMM01=73732878696e755f6d6170203a5d3033 XMM02=65736f6c63206e6f6973736573203a29 XMM03=755f6d6170203a5d3033325b64687373 XMM04=69662068637573206f4e203a656c6163 XMM05=3a656c696620766e65206e65706f206f XMM06=65733a6468737328766e655f6d617020 XMM07=6b7a79732039323a39303a3930203132 XMM08=3d656e696c646d632022656369767265 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000