syzkaller login: [ 33.603391] BUG: Bad rss-counter state mm:000000002aabf115 type:MM_FILEPAGES val:33 [ 33.605197] BUG: Bad rss-counter state mm:000000002aabf115 type:MM_ANONPAGES val:22 [ 33.776681] ================================================================== [ 33.777669] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 33.778679] Read of size 8 at addr ffff88801595b5c8 by task sshd/220 [ 33.779693] [ 33.779925] CPU: 1 PID: 220 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 33.780834] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 33.781881] Call Trace: [ 33.782223] [ 33.782540] dump_stack_lvl+0x91/0xf0 [ 33.783059] print_report+0xcc/0x620 [ 33.783571] ? __virt_addr_valid+0x102/0x340 [ 33.784163] ? vma_interval_tree_remove+0xc75/0xec0 [ 33.784827] ? vma_interval_tree_remove+0xc75/0xec0 [ 33.785487] kasan_report+0xbe/0xf0 [ 33.785999] ? vma_interval_tree_remove+0xc75/0xec0 [ 33.786691] vma_interval_tree_remove+0xc75/0xec0 [ 33.787341] vma_prepare+0xc54/0x11a0 [ 33.787850] __split_vma+0x5af/0x950 [ 33.788358] ? __pfx___split_vma+0x10/0x10 [ 33.788916] ? find_held_lock+0x2c/0x110 [ 33.789469] do_vmi_align_munmap+0x2ba/0x11f0 [ 33.790076] ? lock_is_held_type+0x9f/0x120 [ 33.790657] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 33.791308] ? mtree_range_walk+0x632/0x900 [ 33.791894] ? mas_walk+0x5c7/0x7c0 [ 33.792401] do_vmi_munmap+0x1f1/0x2b0 [ 33.792928] mmap_region+0x1f9/0x2660 [ 33.793436] ? vm_mmap_pgoff+0x15c/0x3a0 [ 33.793984] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 33.794755] ? __pfx_lock_acquire+0x10/0x10 [ 33.795326] ? __pfx_mmap_region+0x10/0x10 [ 33.795893] ? security_mmap_addr+0x7d/0xa0 [ 33.796461] ? get_unmapped_area+0x1f5/0x3f0 [ 33.797049] do_mmap+0x854/0xf00 [ 33.797523] vm_mmap_pgoff+0x1a6/0x3a0 [ 33.798084] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 33.798725] ksys_mmap_pgoff+0x3af/0x500 [ 33.799281] do_syscall_64+0x3f/0x90 [ 33.799809] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 33.800519] RIP: 0033:0x7f945e719d82 [ 33.801020] 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 [ 33.803399] RSP: 002b:00007ffd26c03758 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 33.804393] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f945e719d82 [ 33.805333] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f945db53000 [ 33.806275] RBP: 00007f945db53000 R08: 0000000000000009 R09: 0000000000001000 [ 33.807241] R10: 0000000000000812 R11: 0000000000000206 R12: 0000556e3cfa7f70 [ 33.808177] R13: 00007ffd26c03770 R14: 00007ffd26c037a0 R15: 00007ffd26c03b00 [ 33.809127] [ 33.809448] [ 33.809685] Allocated by task 213: [ 33.810162] kasan_save_stack+0x22/0x50 [ 33.810727] kasan_set_track+0x25/0x30 [ 33.811268] __kasan_slab_alloc+0x59/0x70 [ 33.811842] kmem_cache_alloc+0x16b/0x370 [ 33.812411] vm_area_dup+0x20/0x160 [ 33.812911] __split_vma+0x170/0x950 [ 33.813430] split_vma+0xc6/0x110 [ 33.813913] mprotect_fixup+0x8d2/0xb30 [ 33.814488] do_mprotect_pkey+0x87e/0xd40 [ 33.815067] __x64_sys_mprotect+0x78/0xc0 [ 33.815646] do_syscall_64+0x3f/0x90 [ 33.816165] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 33.816874] [ 33.817115] Freed by task 203: [ 33.817546] kasan_save_stack+0x22/0x50 [ 33.818104] kasan_set_track+0x25/0x30 [ 33.818657] kasan_save_free_info+0x2b/0x50 [ 33.819245] __kasan_slab_free+0x10a/0x190 [ 33.819829] kmem_cache_free+0x10d/0x4d0 [ 33.820389] rcu_core+0x8c8/0x2860 [ 33.820942] __do_softirq+0x1b7/0x7d4 [ 33.821470] [ 33.821707] Last potentially related work creation: [ 33.822370] kasan_save_stack+0x22/0x50 [ 33.822926] __kasan_record_aux_stack+0x8e/0xa0 [ 33.823562] __call_rcu_common.constprop.0+0x6a/0xb90 [ 33.824277] remove_vma+0x139/0x170 [ 33.824773] do_vmi_align_munmap+0xd4a/0x11f0 [ 33.825382] do_vmi_munmap+0x1f1/0x2b0 [ 33.825915] __vm_munmap+0x138/0x3a0 [ 33.826440] __x64_sys_munmap+0x59/0x80 [ 33.826983] do_syscall_64+0x3f/0x90 [ 33.827507] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 33.828212] [ 33.828447] The buggy address belongs to the object at ffff88801595b570 [ 33.828447] which belongs to the cache vm_area_struct of size 168 [ 33.830072] The buggy address is located 88 bytes inside of [ 33.830072] freed 168-byte region [ffff88801595b570, ffff88801595b618) [ 33.831632] [ 33.831870] The buggy address belongs to the physical page: [ 33.832600] page:00000000ba9f94cb refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x1595b [ 33.833807] memcg:ffff88800e924e01 [ 33.834274] flags: 0x100000000000200(slab|node=0|zone=1) [ 33.834996] page_type: 0xffffffff() [ 33.835470] raw: 0100000000000200 ffff88800879fc80 dead000000000122 0000000000000000 [ 33.836453] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800e924e01 [ 33.837412] page dumped because: kasan: bad access detected [ 33.838117] [ 33.838354] Memory state around the buggy address: [ 33.838979] ffff88801595b480: fc 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 33.839897] ffff88801595b500: 00 00 00 00 00 00 fc fc fc fc fc fc fc fc fa fb [ 33.840825] >ffff88801595b580: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 33.841746] ^ [ 33.842466] ffff88801595b600: fb fb fb fc fc fc fc fc fc fc fc fa fb fb fb fb [ 33.843403] ffff88801595b680: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 33.844306] ================================================================== [ 33.845373] Disabling lock debugging due to kernel taint [ 35.893051] BUG: Bad rss-counter state mm:00000000d737f314 type:MM_FILEPAGES val:33 [ 35.894144] BUG: Bad rss-counter state mm:00000000d737f314 type:MM_ANONPAGES val:22 [ 36.379907] BUG: Bad rss-counter state mm:00000000eabd6921 type:MM_FILEPAGES val:33 [ 36.380655] BUG: Bad rss-counter state mm:00000000eabd6921 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:27157' (ECDSA) to the list of known hosts. 2023/06/20 06:10:57 fuzzer started 2023/06/20 06:10:57 dialing manager at localhost:44161 2023/06/20 06:10:57 checking machine... 2023/06/20 06:10:57 checking revisions... [ 36.990663] kmemleak: Automatic memory scanning thread ended 2023/06/20 06:10:57 testing simple program... [ 37.034660] cgroup: Unknown subsys name 'net' [ 37.072956] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 06:10:53 Registers: info registers vcpu 0 RAX=dffffc0000000000 RBX=ffff88806ce0f000 RCX=0000000000000000 RDX=1ffff110032b3cf0 RSI=0000000000000001 RDI=ffff88801959e780 RBP=ffff88801959d1c0 RSP=ffff88801656fa10 R8 =ffff88801959b124 R9 =fffffbfff0ba77da R10=ffffffff85d3bed7 R11=0000000000000000 R12=ffff888019599b40 R13=0000000000000000 R14=ffff88801959b100 R15=ffff88801959b126 RIP=ffffffff8107f1fa 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 00007fb1f33f2700 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=00007f17b1ed0280 CR3=0000000015a08000 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=30313a3630203032206e754a3e36383c XMM01=7365733a646873732878696e755f6d61 XMM02=736f6c63206e6f6973736573203a296e XMM03=5f6d6170203a5d3932325b6468737320 XMM04=6456774875434142334f726f59427469 XMM05=485320415352203a3268737320303634 XMM06=206d6f726620746f6f7220726f662079 XMM07=00000000000000000000000000000000 XMM08=3a677562656420676f6c737973720000 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=ffff888009510001 RBX=0000000000000001 RCX=0000000000000001 RDX=ffff88800950fb01 RSI=ffff88800950fb70 RDI=ffff88800950f838 RBP=ffff88800950f880 RSP=ffff88800950f7b8 R8 =ffffffff8613751e R9 =ffff88800950f868 R10=0000000000038001 R11=0000000000020d8a R12=ffff88800950f888 R13=ffff88800950f870 R14=ffff88800950fb78 R15=ffff88800950f828 RIP=ffffffff81131039 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 00007f04a68fc900 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=00007f04a68cb008 CR3=0000000009c20000 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