[ 31.143115] BUG: Bad rss-counter state mm:000000000a7133f0 type:MM_FILEPAGES val:33 [ 31.144538] BUG: Bad rss-counter state mm:000000000a7133f0 type:MM_ANONPAGES val:22 [ 31.318728] ================================================================== [ 31.319842] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 31.320960] Read of size 8 at addr ffff88801bc9ced8 by task sshd/218 [ 31.322036] [ 31.322255] CPU: 1 PID: 218 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 31.323144] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 31.324136] Call Trace: [ 31.324457] [ 31.324746] dump_stack_lvl+0x91/0xf0 [ 31.325258] print_report+0xcc/0x620 [ 31.325750] ? __virt_addr_valid+0x102/0x340 [ 31.326326] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.326965] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.327597] kasan_report+0xbe/0xf0 [ 31.328091] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.328729] vma_interval_tree_remove+0xc75/0xec0 [ 31.329356] vma_prepare+0xc54/0x11a0 [ 31.329844] __split_vma+0x5af/0x950 [ 31.330324] ? __pfx___split_vma+0x10/0x10 [ 31.330859] ? find_held_lock+0x2c/0x110 [ 31.331379] do_vmi_align_munmap+0x2ba/0x11f0 [ 31.331957] ? lock_is_held_type+0x9f/0x120 [ 31.332496] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 31.333118] ? mtree_range_walk+0x632/0x900 [ 31.333680] ? mas_walk+0x5c7/0x7c0 [ 31.334158] do_vmi_munmap+0x1f1/0x2b0 [ 31.334662] mmap_region+0x1f9/0x2660 [ 31.335145] ? vm_mmap_pgoff+0x15c/0x3a0 [ 31.335755] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 31.336645] ? __pfx_lock_acquire+0x10/0x10 [ 31.337331] ? __pfx_mmap_region+0x10/0x10 [ 31.337985] ? security_mmap_addr+0x7d/0xa0 [ 31.338624] ? get_unmapped_area+0x1f5/0x3f0 [ 31.339310] do_mmap+0x854/0xf00 [ 31.339858] vm_mmap_pgoff+0x1a6/0x3a0 [ 31.340478] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 31.341210] ksys_mmap_pgoff+0x3af/0x500 [ 31.341839] do_syscall_64+0x3f/0x90 [ 31.342432] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.343226] RIP: 0033:0x7f80dd334d82 [ 31.343777] 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 [ 31.346440] RSP: 002b:00007fff7eeb9228 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 31.347549] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f80dd334d82 [ 31.348613] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f80dc76e000 [ 31.349685] RBP: 00007f80dc76e000 R08: 0000000000000009 R09: 0000000000001000 [ 31.350740] R10: 0000000000000812 R11: 0000000000000206 R12: 00005563c4c1dec0 [ 31.351804] R13: 00007fff7eeb9240 R14: 00007fff7eeb9270 R15: 00007fff7eeb95d0 [ 31.352893] [ 31.353286] [ 31.353550] Allocated by task 210: [ 31.354094] kasan_save_stack+0x22/0x50 [ 31.354737] kasan_set_track+0x25/0x30 [ 31.355354] __kasan_slab_alloc+0x59/0x70 [ 31.355997] kmem_cache_alloc+0x16b/0x370 [ 31.356638] vm_area_dup+0x20/0x160 [ 31.357226] __split_vma+0x170/0x950 [ 31.357798] split_vma+0xc6/0x110 [ 31.358351] mprotect_fixup+0x8d2/0xb30 [ 31.358988] do_mprotect_pkey+0x87e/0xd40 [ 31.359646] __x64_sys_mprotect+0x78/0xc0 [ 31.360296] do_syscall_64+0x3f/0x90 [ 31.360895] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.361724] [ 31.361994] Freed by task 202: [ 31.362488] kasan_save_stack+0x22/0x50 [ 31.363260] kasan_set_track+0x25/0x30 [ 31.363879] kasan_save_free_info+0x2b/0x50 [ 31.364556] __kasan_slab_free+0x10a/0x190 [ 31.365216] kmem_cache_free+0x10d/0x4d0 [ 31.365726] rcu_core+0x8c8/0x2860 [ 31.366172] __do_softirq+0x1b7/0x7d4 [ 31.366660] [ 31.366875] Last potentially related work creation: [ 31.367461] kasan_save_stack+0x22/0x50 [ 31.367966] __kasan_record_aux_stack+0x8e/0xa0 [ 31.368540] __call_rcu_common.constprop.0+0x6a/0xb90 [ 31.369224] remove_vma+0x139/0x170 [ 31.369679] do_vmi_align_munmap+0xd4a/0x11f0 [ 31.370236] do_vmi_munmap+0x1f1/0x2b0 [ 31.370726] __vm_munmap+0x138/0x3a0 [ 31.371200] __x64_sys_munmap+0x59/0x80 [ 31.371699] do_syscall_64+0x3f/0x90 [ 31.372174] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.372820] [ 31.373056] The buggy address belongs to the object at ffff88801bc9ce80 [ 31.373056] which belongs to the cache vm_area_struct of size 168 [ 31.374516] The buggy address is located 88 bytes inside of [ 31.374516] freed 168-byte region [ffff88801bc9ce80, ffff88801bc9cf28) [ 31.375918] [ 31.376137] The buggy address belongs to the physical page: [ 31.376804] page:00000000d3c3ae8c refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x1bc9c [ 31.377924] memcg:ffff88801bc9d001 [ 31.378347] flags: 0x100000000000200(slab|node=0|zone=1) [ 31.379002] page_type: 0xffffffff() [ 31.379456] raw: 0100000000000200 ffff8880087a0c80 dead000000000122 0000000000000000 [ 31.380385] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88801bc9d001 [ 31.381303] page dumped because: kasan: bad access detected [ 31.381973] [ 31.382197] Memory state around the buggy address: [ 31.382781] ffff88801bc9cd80: fc fc fc 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 31.383644] ffff88801bc9ce00: 00 00 00 00 00 00 00 00 fc fc fc fc fc fc fc fc [ 31.384508] >ffff88801bc9ce80: fa fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 31.385376] ^ [ 31.386104] ffff88801bc9cf00: fb fb fb fb fb fc fc fc fc fc fc fc fc fc fc fc [ 31.386976] ffff88801bc9cf80: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc [ 31.387825] ================================================================== [ 31.388916] Disabling lock debugging due to kernel taint Debian GNU/Linux 11 syzkaller ttyS0 syzkaller login: [ 33.978287] BUG: Bad rss-counter state mm:00000000d92f5c56 type:MM_FILEPAGES val:33 [ 33.979489] BUG: Bad rss-counter state mm:00000000d92f5c56 type:MM_ANONPAGES val:22 [ 34.439136] BUG: Bad rss-counter state mm:00000000bf5850fd type:MM_FILEPAGES val:33 [ 34.440393] BUG: Bad rss-counter state mm:00000000bf5850fd type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:37598' (ECDSA) to the list of known hosts. 2023/06/20 17:06:44 fuzzer started 2023/06/20 17:06:44 dialing manager at localhost:36067 2023/06/20 17:06:44 checking machine... 2023/06/20 17:06:44 checking revisions... [ 35.147530] kmemleak: Automatic memory scanning thread ended 2023/06/20 17:06:44 testing simple program... [ 35.200707] cgroup: Unknown subsys name 'net' [ 35.237692] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 17:06:44 Registers: info registers vcpu 0 RAX=fffffbfff0ba7a6a RBX=fffffbfff0ba7a6b RCX=ffffffff812d86ea RDX=fffffbfff0ba7a6b RSI=0000000000000008 RDI=ffffffff85d3d350 RBP=fffffbfff0ba7a6a RSP=ffff888018fc7c68 R8 =0000000000000000 R9 =fffffbfff0ba7a6a R10=ffffffff85d3d357 R11=00000000000b6a61 R12=ffffffff8560b640 R13=ffffffff83651008 R14=0000000000000010 R15=0000000000000001 RIP=ffffffff8180f189 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 00007faafa116900 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=00007faafa6ce0b0 CR3=0000000017d28000 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=2034343a36303a3731203032206e754a XMM01=73732878696e755f6d6170203a5d3732 XMM02=65736f6c63206e6f6973736573203a29 XMM03=755f6d6170203a5d3732325b64687373 XMM04=69662068637573206f4e203a656c6163 XMM05=3a656c696620766e65206e65706f206f XMM06=65733a6468737328766e655f6d617020 XMM07=6b7a79732033343a36303a3731203032 XMM08=3d656e696c646d632022656369767265 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=00007f52e1144360 CR3=000000000d7bc000 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=f95e5676487377b54a49b4c0d00a63fc XMM02=ec2efd57dc4c00df000000000011a8f8 XMM03=0b644c9bd6420245000000000011a9c8 XMM04=e71f1cd812cfc56000000000000ae988 XMM05=e7b254a0286ed61b0000000000132448 XMM06=bdf2e299e47b49d50000000000131178 XMM07=e042d86d42eb936e0000000000121958 XMM08=0b644c9bd6420245000000000011a9c8 XMM09=00000000000000000000000000000000 XMM10=20200000000020202020202020200000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000