syzkaller login: [ 30.827732] BUG: Bad rss-counter state mm:000000001e8ef60b type:MM_FILEPAGES val:33 [ 30.829024] BUG: Bad rss-counter state mm:000000001e8ef60b type:MM_ANONPAGES val:22 [ 30.992970] ================================================================== [ 30.994091] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 30.995289] Read of size 8 at addr ffff88800ead44e0 by task sshd/220 [ 30.996375] [ 30.996644] CPU: 0 PID: 220 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 30.997766] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 30.999015] Call Trace: [ 30.999410] [ 30.999753] dump_stack_lvl+0x91/0xf0 [ 31.000368] print_report+0xcc/0x620 [ 31.000970] ? __virt_addr_valid+0x102/0x340 [ 31.001662] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.002434] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.003216] kasan_report+0xbe/0xf0 [ 31.003811] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.004592] vma_interval_tree_remove+0xc75/0xec0 [ 31.005369] vma_prepare+0xc54/0x11a0 [ 31.005966] __split_vma+0x5af/0x950 [ 31.006557] ? __pfx___split_vma+0x10/0x10 [ 31.007212] ? find_held_lock+0x2c/0x110 [ 31.007850] do_vmi_align_munmap+0x2ba/0x11f0 [ 31.008558] ? lock_is_held_type+0x9f/0x120 [ 31.009271] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 31.010045] ? mtree_range_walk+0x632/0x900 [ 31.010726] ? mas_walk+0x5c7/0x7c0 [ 31.011320] do_vmi_munmap+0x1f1/0x2b0 [ 31.011935] mmap_region+0x1f9/0x2660 [ 31.012545] ? vm_mmap_pgoff+0x15c/0x3a0 [ 31.013177] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 31.014052] ? __pfx_lock_acquire+0x10/0x10 [ 31.014725] ? __pfx_mmap_region+0x10/0x10 [ 31.015396] ? security_mmap_addr+0x7d/0xa0 [ 31.016057] ? get_unmapped_area+0x1f5/0x3f0 [ 31.016767] do_mmap+0x854/0xf00 [ 31.017322] vm_mmap_pgoff+0x1a6/0x3a0 [ 31.017945] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 31.018656] ksys_mmap_pgoff+0x3af/0x500 [ 31.019296] do_syscall_64+0x3f/0x90 [ 31.019892] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.020714] RIP: 0033:0x7fb408e2fd82 [ 31.021278] 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 [ 31.024000] RSP: 002b:00007ffe93afc958 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 31.025173] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007fb408e2fd82 [ 31.026261] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007fb408269000 [ 31.027333] RBP: 00007fb408269000 R08: 0000000000000009 R09: 0000000000001000 [ 31.028412] R10: 0000000000000812 R11: 0000000000000206 R12: 000055921a967ec0 [ 31.029503] R13: 00007ffe93afc970 R14: 00007ffe93afc9a0 R15: 00007ffe93afcd00 [ 31.030594] [ 31.030958] [ 31.031225] Allocated by task 213: [ 31.031764] kasan_save_stack+0x22/0x50 [ 31.032392] kasan_set_track+0x25/0x30 [ 31.033026] __kasan_slab_alloc+0x59/0x70 [ 31.033687] kmem_cache_alloc+0x16b/0x370 [ 31.034331] vm_area_dup+0x20/0x160 [ 31.034902] __split_vma+0x170/0x950 [ 31.035476] split_vma+0xc6/0x110 [ 31.036028] mprotect_fixup+0x8d2/0xb30 [ 31.036646] do_mprotect_pkey+0x87e/0xd40 [ 31.037312] __x64_sys_mprotect+0x78/0xc0 [ 31.037954] do_syscall_64+0x3f/0x90 [ 31.038535] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.039353] [ 31.039622] Freed by task 213: [ 31.040100] kasan_save_stack+0x22/0x50 [ 31.040734] kasan_set_track+0x25/0x30 [ 31.041372] kasan_save_free_info+0x2b/0x50 [ 31.042039] __kasan_slab_free+0x10a/0x190 [ 31.042701] kmem_cache_free+0x10d/0x4d0 [ 31.043333] rcu_core+0x8c8/0x2860 [ 31.043880] __do_softirq+0x1b7/0x7d4 [ 31.044481] [ 31.044759] Last potentially related work creation: [ 31.045482] kasan_save_stack+0x22/0x50 [ 31.045965] __kasan_record_aux_stack+0x8e/0xa0 [ 31.046508] __call_rcu_common.constprop.0+0x6a/0xb90 [ 31.047114] remove_vma+0x139/0x170 [ 31.047539] do_vmi_align_munmap+0xd4a/0x11f0 [ 31.048068] do_vmi_munmap+0x1f1/0x2b0 [ 31.048527] __vm_munmap+0x138/0x3a0 [ 31.048986] __x64_sys_munmap+0x59/0x80 [ 31.049462] do_syscall_64+0x3f/0x90 [ 31.049911] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.050516] [ 31.050722] The buggy address belongs to the object at ffff88800ead4488 [ 31.050722] which belongs to the cache vm_area_struct of size 168 [ 31.052091] The buggy address is located 88 bytes inside of [ 31.052091] freed 168-byte region [ffff88800ead4488, ffff88800ead4530) [ 31.053416] [ 31.053621] The buggy address belongs to the physical page: [ 31.054237] page:0000000067b53731 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xead4 [ 31.055252] memcg:ffff88800e698501 [ 31.055685] flags: 0x100000000000200(slab|node=0|zone=1) [ 31.056345] page_type: 0xffffffff() [ 31.056820] raw: 0100000000000200 ffff8880087a0c80 dead000000000122 0000000000000000 [ 31.057758] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800e698501 [ 31.058685] page dumped because: kasan: bad access detected [ 31.059419] [ 31.059643] Memory state around the buggy address: [ 31.060271] ffff88800ead4380: fc fc fc fc 00 00 00 00 00 00 00 00 00 00 00 00 [ 31.061218] ffff88800ead4400: 00 00 00 00 00 00 00 00 00 fc fc fc fc fc fc fc [ 31.062147] >ffff88800ead4480: fc fa fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 31.063067] ^ [ 31.063898] ffff88800ead4500: fb fb fb fb fb fb fc fc fc fc fc fc fc fc fa fb [ 31.064846] ffff88800ead4580: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 31.065778] ================================================================== [ 31.066827] Disabling lock debugging due to kernel taint [ 33.148543] BUG: Bad rss-counter state mm:00000000e07b0cfe type:MM_FILEPAGES val:33 [ 33.149853] BUG: Bad rss-counter state mm:00000000e07b0cfe type:MM_ANONPAGES val:22 [ 33.643327] BUG: Bad rss-counter state mm:000000006bc86401 type:MM_FILEPAGES val:33 [ 33.644534] BUG: Bad rss-counter state mm:000000006bc86401 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:62919' (ECDSA) to the list of known hosts. 2023/06/20 10:49:41 fuzzer started 2023/06/20 10:49:42 dialing manager at localhost:36067 2023/06/20 10:49:42 checking machine... 2023/06/20 10:49:42 checking revisions... [ 34.303017] kmemleak: Automatic memory scanning thread ended 2023/06/20 10:49:42 testing simple program... [ 34.332233] cgroup: Unknown subsys name 'net' [ 34.378788] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 10:49:41 Registers: info registers vcpu 0 RAX=0000000000000000 RBX=0000000000000001 RCX=ffffffff864b202c RDX=0000000000000001 RSI=0000000000000000 RDI=0000000000000001 RBP=ffff88806ce09af0 RSP=ffff88806ce09a28 R8 =ffffffff864b2030 R9 =ffff88806ce09ad8 R10=0000000000038001 R11=00000000000b5080 R12=ffff88806ce09af8 R13=ffff88806ce09ae0 R14=ffff88801438ff58 R15=ffff88806ce09a98 RIP=ffffffff81131151 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 00007f8c78db8900 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=00007f0661037650 CR3=0000000013662000 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=ffffffffffffffffffffffffffffffff XMM01=30306234386136303638616663356134 XMM02=38303062343861363036386166633561 XMM03=2f6c616e72756f6a2f676f6c2f6e7572 XMM04=5e25420ff163d3e600000000000ae988 XMM05=6fbc5da6186abec90000000000133530 XMM06=4fda316b135da52b0000000000132320 XMM07=00000000000000000000000000000000 XMM08=415453454d49545f454d49544c414552 XMM09=00000000000000000000000000000000 XMM10=20200000000020202020202020200000 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=ffff888008df7e70 R8 =0000000000000000 R9 =ffffed100d9e6a00 R10=ffff88806cf35003 R11=0000000000000001 R12=ffffffff85d3d350 R13=1ffff110011befd3 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=00007ffddf5db318 CR3=000000000c510000 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=2031343a39343a3031203032206e754a XMM01=73732878696e755f6d6170203a5d3932 XMM02=65736f6c63206e6f6973736573203a29 XMM03=755f6d6170203a5d3932325b64687373 XMM04=69662068637573206f4e203a656c6163 XMM05=3a656c696620766e65206e65706f206f XMM06=65733a6468737328766e655f6d617020 XMM07=6b7a79732031343a39343a3031203032 XMM08=3d656e696c646d632022656369767265 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000