syzkaller login: [ 38.938118] BUG: Bad rss-counter state mm:000000006f1ac429 type:MM_FILEPAGES val:33 [ 38.939307] BUG: Bad rss-counter state mm:000000006f1ac429 type:MM_ANONPAGES val:22 [ 38.979076] ================================================================== [ 38.980093] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 38.981212] Read of size 8 at addr ffff88801810b058 by task sshd/221 [ 38.982069] [ 38.982350] CPU: 1 PID: 221 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 38.983218] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 38.984343] Call Trace: [ 38.984668] [ 38.984970] dump_stack_lvl+0x91/0xf0 [ 38.985467] print_report+0xcc/0x620 [ 38.985927] ? __virt_addr_valid+0x102/0x340 [ 38.986624] ? vma_interval_tree_remove+0xc75/0xec0 [ 38.987211] ? vma_interval_tree_remove+0xc75/0xec0 [ 38.987789] kasan_report+0xbe/0xf0 [ 38.988241] ? vma_interval_tree_remove+0xc75/0xec0 [ 38.988847] vma_interval_tree_remove+0xc75/0xec0 [ 38.989433] vma_prepare+0xc54/0x11a0 [ 38.989912] __split_vma+0x5af/0x950 [ 38.990365] ? __pfx___split_vma+0x10/0x10 [ 38.990884] ? find_held_lock+0x2c/0x110 [ 38.991397] do_vmi_align_munmap+0x2ba/0x11f0 [ 38.991955] ? lock_is_held_type+0x9f/0x120 [ 38.992517] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 38.993114] ? mtree_range_walk+0x632/0x900 [ 38.993666] ? mas_walk+0x5c7/0x7c0 [ 38.994134] do_vmi_munmap+0x1f1/0x2b0 [ 38.994608] mmap_region+0x1f9/0x2660 [ 38.995092] ? vm_mmap_pgoff+0x15c/0x3a0 [ 38.995592] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 38.996288] ? __pfx_lock_acquire+0x10/0x10 [ 38.996827] ? __pfx_mmap_region+0x10/0x10 [ 38.997340] ? security_mmap_addr+0x7d/0xa0 [ 38.997853] ? get_unmapped_area+0x1f5/0x3f0 [ 38.998404] do_mmap+0x854/0xf00 [ 38.998840] vm_mmap_pgoff+0x1a6/0x3a0 [ 38.999337] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 38.999884] ksys_mmap_pgoff+0x3af/0x500 [ 39.000373] do_syscall_64+0x3f/0x90 [ 39.000847] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 39.001477] RIP: 0033:0x7f54ab4b1d82 [ 39.001930] 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 [ 39.004023] RSP: 002b:00007ffcafd52fc8 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 39.004926] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f54ab4b1d82 [ 39.005754] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f54aa8eb000 [ 39.006576] RBP: 00007f54aa8eb000 R08: 0000000000000009 R09: 0000000000001000 [ 39.007402] R10: 0000000000000812 R11: 0000000000000206 R12: 000055cf6bff8b20 [ 39.008237] R13: 00007ffcafd52fe0 R14: 00007ffcafd53010 R15: 00007ffcafd53370 [ 39.009086] [ 39.009370] [ 39.009585] Allocated by task 213: [ 39.010009] kasan_save_stack+0x22/0x50 [ 39.010500] kasan_set_track+0x25/0x30 [ 39.010981] __kasan_slab_alloc+0x59/0x70 [ 39.011498] kmem_cache_alloc+0x16b/0x370 [ 39.012006] vm_area_dup+0x20/0x160 [ 39.012447] __split_vma+0x170/0x950 [ 39.012927] split_vma+0xc6/0x110 [ 39.013355] mprotect_fixup+0x8d2/0xb30 [ 39.013846] do_mprotect_pkey+0x87e/0xd40 [ 39.014359] __x64_sys_mprotect+0x78/0xc0 [ 39.014864] do_syscall_64+0x3f/0x90 [ 39.015328] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 39.015963] [ 39.016177] Freed by task 213: [ 39.016567] kasan_save_stack+0x22/0x50 [ 39.017056] kasan_set_track+0x25/0x30 [ 39.017533] kasan_save_free_info+0x2b/0x50 [ 39.018050] __kasan_slab_free+0x10a/0x190 [ 39.018572] kmem_cache_free+0x10d/0x4d0 [ 39.019064] rcu_core+0x8c8/0x2860 [ 39.019493] __do_softirq+0x1b7/0x7d4 [ 39.019958] [ 39.020169] Last potentially related work creation: [ 39.020808] kasan_save_stack+0x22/0x50 [ 39.021299] __kasan_record_aux_stack+0x8e/0xa0 [ 39.021859] __call_rcu_common.constprop.0+0x6a/0xb90 [ 39.022489] remove_vma+0x139/0x170 [ 39.022931] do_vmi_align_munmap+0xd4a/0x11f0 [ 39.023476] do_vmi_munmap+0x1f1/0x2b0 [ 39.023948] __vm_munmap+0x138/0x3a0 [ 39.024406] __x64_sys_munmap+0x59/0x80 [ 39.024897] do_syscall_64+0x3f/0x90 [ 39.025361] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 39.025986] [ 39.026199] The buggy address belongs to the object at ffff88801810b000 [ 39.026199] which belongs to the cache vm_area_struct of size 168 [ 39.027643] The buggy address is located 88 bytes inside of [ 39.027643] freed 168-byte region [ffff88801810b000, ffff88801810b0a8) [ 39.029018] [ 39.029228] The buggy address belongs to the physical page: [ 39.029870] page:000000000e52734b refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x1810b [ 39.030947] memcg:ffff88800e392201 [ 39.031364] flags: 0x100000000000200(slab|node=0|zone=1) [ 39.031991] page_type: 0xffffffff() [ 39.032435] raw: 0100000000000200 ffff8880087a0c80 dead000000000122 0000000000000000 [ 39.033347] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800e392201 [ 39.034230] page dumped because: kasan: bad access detected [ 39.034879] [ 39.035091] Memory state around the buggy address: [ 39.035656] ffff88801810af00: fb fb fb fb fb fb fc fc fc fc fc fc fc fc fc fc [ 39.036495] ffff88801810af80: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc [ 39.037337] >ffff88801810b000: fa fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 39.038177] ^ [ 39.038893] ffff88801810b080: fb fb fb fb fb fc fc fc fc fc fc fc fc fa fb fb [ 39.039733] ffff88801810b100: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 39.040570] ================================================================== [ 39.041467] Disabling lock debugging due to kernel taint [ 40.721493] BUG: Bad rss-counter state mm:00000000f3150f19 type:MM_FILEPAGES val:33 [ 40.722115] BUG: Bad rss-counter state mm:00000000f3150f19 type:MM_ANONPAGES val:22 [ 41.170927] BUG: Bad rss-counter state mm:00000000e88afff0 type:MM_FILEPAGES val:33 [ 41.171902] BUG: Bad rss-counter state mm:00000000e88afff0 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:33754' (ECDSA) to the list of known hosts. 2023/06/20 14:48:37 fuzzer started 2023/06/20 14:48:37 dialing manager at localhost:36067 2023/06/20 14:48:37 checking machine... 2023/06/20 14:48:37 checking revisions... [ 41.896310] kmemleak: Automatic memory scanning thread ended 2023/06/20 14:48:37 testing simple program... [ 41.946769] cgroup: Unknown subsys name 'net' [ 41.992892] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 14:48:37 Registers: info registers vcpu 0 RAX=ffff88800fbd8001 RBX=ffff88806ce09a98 RCX=0000000000000001 RDX=ffff88800fbd7f01 RSI=ffff88800fbd7f48 RDI=ffff88806ce09aa8 RBP=ffff88800fbd7f48 RSP=ffff88806ce099f0 R8 =0000000000000001 R9 =ffff88806ce09ad8 R10=0000000000038001 R11=00000000000b5080 R12=0000000000000008 R13=ffff88800fbd0000 R14=ffff88800fbd7f48 R15=ffff88806ce09a98 RIP=ffffffff8113048d RFL=00000283 [--S---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 00007f2781001700 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=00007f163d8520b0 CR3=000000000faea000 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=00000000000000000000000000000000 XMM01=6d6f72662064657463656e6e6f637369 XMM02=2e303120746f6f722072657375206d6f XMM03=3a5d3033325b646873732037333a3834 XMM04=6456774875434142334f726f59427469 XMM05=485320415352203a3268737320323234 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=ffff88806cf35000 RBX=0000000000000001 RCX=ffffffff8451250e RDX=ffffed100d9e6a01 RSI=0000000000000004 RDI=ffffffff81288ac5 RBP=dffffc0000000000 RSP=ffff888008e07e70 R8 =0000000000000000 R9 =ffffed100d9e6a00 R10=ffff88806cf35003 R11=0000000000000001 R12=ffffffff85d3d350 R13=1ffff110011c0fd3 R14=0000000000000000 R15=0000000000000000 RIP=ffffffff8451349f RFL=00000246 [---Z-P-] CPL=0 II=0 A20=1 SMM=0 HLT=1 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=00007f6fb6690470 CR3=000000000d810000 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=a36a073d42a705bacb44bdf0c92de90d XMM02=000000000011a8a8ec2efd57dc4c00df XMM03=00000000001212488f29d111c4da7c9a XMM04=c7ff40f42491deb000000000000ae988 XMM05=a50ca346e85902ad0000000000131578 XMM06=c291bd5c70af25b90000000000130ce8 XMM07=e042d86d42eb936e00000000001214c8 XMM08=8f29d111c4da7c9a000000000011a908 XMM09=00000000000000000000000000000000 XMM10=20200000000020202020202020200000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000