syzkaller login: [ 34.458159] BUG: Bad rss-counter state mm:00000000b59af0e7 type:MM_FILEPAGES val:33 [ 34.459216] BUG: Bad rss-counter state mm:00000000b59af0e7 type:MM_ANONPAGES val:22 [ 34.622052] ================================================================== [ 34.623162] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 34.624301] Read of size 8 at addr ffff88800cb87df0 by task sshd/220 [ 34.625338] [ 34.625610] CPU: 0 PID: 220 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 34.626653] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 34.627889] Call Trace: [ 34.628291] [ 34.628648] dump_stack_lvl+0x91/0xf0 [ 34.629240] print_report+0xcc/0x620 [ 34.629816] ? __virt_addr_valid+0x102/0x340 [ 34.630482] ? vma_interval_tree_remove+0xc75/0xec0 [ 34.631253] ? vma_interval_tree_remove+0xc75/0xec0 [ 34.631990] kasan_report+0xbe/0xf0 [ 34.632566] ? vma_interval_tree_remove+0xc75/0xec0 [ 34.633315] vma_interval_tree_remove+0xc75/0xec0 [ 34.634042] vma_prepare+0xc54/0x11a0 [ 34.634632] __split_vma+0x5af/0x950 [ 34.635234] ? __pfx___split_vma+0x10/0x10 [ 34.635885] ? find_held_lock+0x2c/0x110 [ 34.636513] do_vmi_align_munmap+0x2ba/0x11f0 [ 34.637214] ? lock_is_held_type+0x9f/0x120 [ 34.637866] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 34.638616] ? mtree_range_walk+0x632/0x900 [ 34.639296] ? mas_walk+0x5c7/0x7c0 [ 34.639873] do_vmi_munmap+0x1f1/0x2b0 [ 34.640475] mmap_region+0x1f9/0x2660 [ 34.641066] ? vm_mmap_pgoff+0x15c/0x3a0 [ 34.641699] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 34.642557] ? __pfx_lock_acquire+0x10/0x10 [ 34.643222] ? __pfx_mmap_region+0x10/0x10 [ 34.643870] ? security_mmap_addr+0x7d/0xa0 [ 34.644519] ? get_unmapped_area+0x1f5/0x3f0 [ 34.645195] do_mmap+0x854/0xf00 [ 34.645675] vm_mmap_pgoff+0x1a6/0x3a0 [ 34.646150] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 34.646688] ksys_mmap_pgoff+0x3af/0x500 [ 34.647192] do_syscall_64+0x3f/0x90 [ 34.647651] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 34.648269] RIP: 0033:0x7f2edcd26d82 [ 34.648702] 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 [ 34.650692] RSP: 002b:00007ffe40674358 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 34.651562] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f2edcd26d82 [ 34.652359] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f2edc160000 [ 34.653158] RBP: 00007f2edc160000 R08: 0000000000000009 R09: 0000000000001000 [ 34.653951] R10: 0000000000000812 R11: 0000000000000206 R12: 0000560a31de4ec0 [ 34.654781] R13: 00007ffe40674370 R14: 00007ffe406743a0 R15: 00007ffe40674700 [ 34.655626] [ 34.655920] [ 34.656134] Allocated by task 213: [ 34.656560] kasan_save_stack+0x22/0x50 [ 34.657054] kasan_set_track+0x25/0x30 [ 34.657553] __kasan_slab_alloc+0x59/0x70 [ 34.658074] kmem_cache_alloc+0x16b/0x370 [ 34.658581] vm_area_dup+0x20/0x160 [ 34.659058] __split_vma+0x170/0x950 [ 34.659531] split_vma+0xc6/0x110 [ 34.659961] mprotect_fixup+0x8d2/0xb30 [ 34.660456] do_mprotect_pkey+0x87e/0xd40 [ 34.660977] __x64_sys_mprotect+0x78/0xc0 [ 34.661492] do_syscall_64+0x3f/0x90 [ 34.661960] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 34.662604] [ 34.662820] Freed by task 213: [ 34.663219] kasan_save_stack+0x22/0x50 [ 34.663733] kasan_set_track+0x25/0x30 [ 34.664221] kasan_save_free_info+0x2b/0x50 [ 34.664751] __kasan_slab_free+0x10a/0x190 [ 34.665286] kmem_cache_free+0x10d/0x4d0 [ 34.665788] rcu_core+0x8c8/0x2860 [ 34.666224] __do_softirq+0x1b7/0x7d4 [ 34.666693] [ 34.666909] Last potentially related work creation: [ 34.667515] kasan_save_stack+0x22/0x50 [ 34.668015] __kasan_record_aux_stack+0x8e/0xa0 [ 34.668588] __call_rcu_common.constprop.0+0x6a/0xb90 [ 34.669225] remove_vma+0x139/0x170 [ 34.669680] do_vmi_align_munmap+0xd4a/0x11f0 [ 34.670238] do_vmi_munmap+0x1f1/0x2b0 [ 34.670719] __vm_munmap+0x138/0x3a0 [ 34.671197] __x64_sys_munmap+0x59/0x80 [ 34.671690] do_syscall_64+0x3f/0x90 [ 34.672157] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 34.672812] [ 34.673027] Second to last potentially related work creation: [ 34.673720] kasan_save_stack+0x22/0x50 [ 34.674227] __kasan_record_aux_stack+0x8e/0xa0 [ 34.674804] __call_rcu_common.constprop.0+0x6a/0xb90 [ 34.675452] remove_vma+0x139/0x170 [ 34.675903] do_vmi_align_munmap+0xd4a/0x11f0 [ 34.676469] do_vmi_munmap+0x1f1/0x2b0 [ 34.676954] mmap_region+0x1f9/0x2660 [ 34.677437] do_mmap+0x854/0xf00 [ 34.677863] vm_mmap_pgoff+0x1a6/0x3a0 [ 34.678350] ksys_mmap_pgoff+0x3af/0x500 [ 34.678852] do_syscall_64+0x3f/0x90 [ 34.679350] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 34.679997] [ 34.680214] The buggy address belongs to the object at ffff88800cb87d98 [ 34.680214] which belongs to the cache vm_area_struct of size 168 [ 34.681701] The buggy address is located 88 bytes inside of [ 34.681701] freed 168-byte region [ffff88800cb87d98, ffff88800cb87e40) [ 34.683113] [ 34.683333] The buggy address belongs to the physical page: [ 34.684070] page:00000000f882eca6 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xcb87 [ 34.685140] memcg:ffff8880094c2001 [ 34.685560] anon flags: 0x100000000000200(slab|node=0|zone=1) [ 34.686253] page_type: 0xffffffff() [ 34.686699] raw: 0100000000000200 ffff88800879fc80 ffffea00003b5440 dead000000000003 [ 34.687643] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff8880094c2001 [ 34.688544] page dumped because: kasan: bad access detected [ 34.689209] [ 34.689423] Memory state around the buggy address: [ 34.690011] ffff88800cb87c80: fc fc fc fc fc fc fa fb fb fb fb fb fb fb fb fb [ 34.690842] ffff88800cb87d00: fb fb fb fb fb fb fb fb fb fb fb fc fc fc fc fc [ 34.691660] >ffff88800cb87d80: fc fc fc fa fb fb fb fb fb fb fb fb fb fb fb fb [ 34.692461] ^ [ 34.693215] ffff88800cb87e00: fb fb fb fb fb fb fb fb fc fc fc fc fc fc fc fc [ 34.694018] ffff88800cb87e80: fa fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 34.694820] ================================================================== [ 34.695858] Disabling lock debugging due to kernel taint [ 36.711209] BUG: Bad rss-counter state mm:00000000889b50b6 type:MM_FILEPAGES val:33 [ 36.712394] BUG: Bad rss-counter state mm:00000000889b50b6 type:MM_ANONPAGES val:22 [ 37.176601] BUG: Bad rss-counter state mm:000000000ea7847a type:MM_FILEPAGES val:33 [ 37.177975] BUG: Bad rss-counter state mm:000000000ea7847a type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:8539' (ECDSA) to the list of known hosts. 2023/06/19 11:58:01 fuzzer started 2023/06/19 11:58:02 dialing manager at localhost:44161 2023/06/19 11:58:02 checking machine... 2023/06/19 11:58:02 checking revisions... [ 37.885053] kmemleak: Automatic memory scanning thread ended 2023/06/19 11:58:02 testing simple program... [ 37.933974] cgroup: Unknown subsys name 'net' [ 37.973751] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 11:57:56 Registers: info registers vcpu 0 RAX=dffffc0000000000 RBX=0000000000000000 RCX=0000000000000000 RDX=0000000000000000 RSI=ffff88800d82f7a4 RDI=ffff88800d82f750 RBP=ffff88800d82f750 RSP=ffff88800d82f660 R8 =0000000000000005 R9 =0000000000000000 R10=0000000000000000 R11=0000000000000001 R12=ffff88800d82f750 R13=0000000000000000 R14=ffff88800d82f758 R15=ffffed1001b05ef4 RIP=ffffffff8189c824 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 00007f6168721900 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=000055e2eaa7a748 CR3=000000000d7c6000 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=94eec714919e4c4f00000000000ae988 XMM05=2de7c4f5b09d235d00000000001362f0 XMM06=4fda316b135da52b0000000000135390 XMM07=fb795ef6d657705600000000001245d8 XMM08=4f5453444600273d67736d000d0a0920 XMM09=00000000000000000000000000000000 XMM10=20200000000020202020202020200000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=0000000000000000 RBX=dffffc0000000000 RCX=0000000000000000 RDX=ffff888018140000 RSI=ffffffff81ef7b48 RDI=ffffffff87f3f610 RBP=0000000000000001 RSP=ffff888018387688 R8 =0000000000000005 R9 =0000000000000000 R10=0000000000000000 R11=656d616e74736f68 R12=ffff88800ddc0888 R13=0000000000000005 R14=0000000000000001 R15=0000000000000001 RIP=ffffffff81ef7b63 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 00007fa246466900 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=00007ffe6165e000 CR3=000000000f092000 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