[ 33.980559] BUG: Bad rss-counter state mm:000000003dab84d3 type:MM_FILEPAGES val:33 [ 33.981826] BUG: Bad rss-counter state mm:000000003dab84d3 type:MM_ANONPAGES val:22 [ 34.185190] ================================================================== [ 34.186202] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 34.187298] Read of size 8 at addr ffff88800e28d140 by task sshd/219 [ 34.188129] [ 34.188424] CPU: 1 PID: 219 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 34.189597] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 34.190889] Call Trace: [ 34.191326] [ 34.191712] dump_stack_lvl+0x91/0xf0 [ 34.192374] print_report+0xcc/0x620 [ 34.193032] ? __virt_addr_valid+0x102/0x340 [ 34.193802] ? vma_interval_tree_remove+0xc75/0xec0 [ 34.194655] ? vma_interval_tree_remove+0xc75/0xec0 [ 34.195508] kasan_report+0xbe/0xf0 [ 34.196166] ? vma_interval_tree_remove+0xc75/0xec0 [ 34.197020] vma_interval_tree_remove+0xc75/0xec0 [ 34.197975] vma_prepare+0xc54/0x11a0 [ 34.198579] __split_vma+0x5af/0x950 [ 34.199158] ? __pfx___split_vma+0x10/0x10 [ 34.199800] ? find_held_lock+0x2c/0x110 [ 34.200437] do_vmi_align_munmap+0x2ba/0x11f0 [ 34.201130] ? lock_is_held_type+0x9f/0x120 [ 34.201807] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 34.202408] ? mtree_range_walk+0x632/0x900 [ 34.202955] ? mas_walk+0x5c7/0x7c0 [ 34.203427] do_vmi_munmap+0x1f1/0x2b0 [ 34.203921] mmap_region+0x1f9/0x2660 [ 34.204402] ? vm_mmap_pgoff+0x15c/0x3a0 [ 34.204910] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 34.205634] ? __pfx_lock_acquire+0x10/0x10 [ 34.206176] ? __pfx_mmap_region+0x10/0x10 [ 34.206702] ? security_mmap_addr+0x7d/0xa0 [ 34.207248] ? get_unmapped_area+0x1f5/0x3f0 [ 34.207825] do_mmap+0x854/0xf00 [ 34.208301] vm_mmap_pgoff+0x1a6/0x3a0 [ 34.208825] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 34.209392] ksys_mmap_pgoff+0x3af/0x500 [ 34.210093] do_syscall_64+0x3f/0x90 [ 34.210576] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 34.211218] RIP: 0033:0x7f0c07d84d82 [ 34.211677] 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 [ 34.213841] RSP: 002b:00007fff74458d38 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 34.214759] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f0c07d84d82 [ 34.215603] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f0c071be000 [ 34.216454] RBP: 00007f0c071be000 R08: 0000000000000009 R09: 0000000000001000 [ 34.217299] R10: 0000000000000812 R11: 0000000000000206 R12: 0000560609478ec0 [ 34.218149] R13: 00007fff74458d50 R14: 00007fff74458d80 R15: 00007fff744590e0 [ 34.219009] [ 34.219303] [ 34.219514] Allocated by task 212: [ 34.219951] kasan_save_stack+0x22/0x50 [ 34.220469] kasan_set_track+0x25/0x30 [ 34.220971] __kasan_slab_alloc+0x59/0x70 [ 34.221520] kmem_cache_alloc+0x16b/0x370 [ 34.222063] vm_area_dup+0x20/0x160 [ 34.222533] __split_vma+0x170/0x950 [ 34.223021] split_vma+0xc6/0x110 [ 34.223479] mprotect_fixup+0x8d2/0xb30 [ 34.224005] do_mprotect_pkey+0x87e/0xd40 [ 34.224555] __x64_sys_mprotect+0x78/0xc0 [ 34.225102] do_syscall_64+0x3f/0x90 [ 34.225615] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 34.226274] [ 34.226499] Freed by task 19: [ 34.226902] kasan_save_stack+0x22/0x50 [ 34.227430] kasan_set_track+0x25/0x30 [ 34.228040] kasan_save_free_info+0x2b/0x50 [ 34.228586] __kasan_slab_free+0x10a/0x190 [ 34.229143] kmem_cache_free+0x10d/0x4d0 [ 34.229688] rcu_core+0x8c8/0x2860 [ 34.230157] __do_softirq+0x1b7/0x7d4 [ 34.230655] [ 34.230886] Last potentially related work creation: [ 34.231506] kasan_save_stack+0x22/0x50 [ 34.232023] __kasan_record_aux_stack+0x8e/0xa0 [ 34.232614] __call_rcu_common.constprop.0+0x6a/0xb90 [ 34.233290] remove_vma+0x139/0x170 [ 34.233769] do_vmi_align_munmap+0xd4a/0x11f0 [ 34.234353] do_vmi_munmap+0x1f1/0x2b0 [ 34.234858] __vm_munmap+0x138/0x3a0 [ 34.235340] __x64_sys_munmap+0x59/0x80 [ 34.235858] do_syscall_64+0x3f/0x90 [ 34.236351] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 34.237013] [ 34.237232] Second to last potentially related work creation: [ 34.237966] kasan_save_stack+0x22/0x50 [ 34.238488] __kasan_record_aux_stack+0x8e/0xa0 [ 34.239087] __call_rcu_common.constprop.0+0x6a/0xb90 [ 34.239753] remove_vma+0x139/0x170 [ 34.240216] do_vmi_align_munmap+0xd4a/0x11f0 [ 34.240803] do_vmi_munmap+0x1f1/0x2b0 [ 34.241305] mmap_region+0x1f9/0x2660 [ 34.241807] do_mmap+0x854/0xf00 [ 34.242256] vm_mmap_pgoff+0x1a6/0x3a0 [ 34.242768] ksys_mmap_pgoff+0x7d/0x500 [ 34.243280] do_syscall_64+0x3f/0x90 [ 34.243771] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 34.244440] [ 34.244663] The buggy address belongs to the object at ffff88800e28d0e8 [ 34.244663] which belongs to the cache vm_area_struct of size 168 [ 34.246222] The buggy address is located 88 bytes inside of [ 34.246222] freed 168-byte region [ffff88800e28d0e8, ffff88800e28d190) [ 34.247673] [ 34.247894] The buggy address belongs to the physical page: [ 34.248553] page:00000000a53b7663 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xe28d [ 34.249651] memcg:ffff88800e109101 [ 34.250087] flags: 0x100000000000200(slab|node=0|zone=1) [ 34.250764] page_type: 0xffffffff() [ 34.251236] raw: 0100000000000200 ffff88800879fc80 ffffea000037f380 dead000000000002 [ 34.252197] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800e109101 [ 34.253146] page dumped because: kasan: bad access detected [ 34.253852] [ 34.254078] Memory state around the buggy address: [ 34.254687] ffff88800e28d000: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 34.255588] ffff88800e28d080: 00 00 00 00 00 fc fc fc fc fc fc fc fc fa fb fb [ 34.256472] >ffff88800e28d100: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 34.257380] ^ [ 34.258053] ffff88800e28d180: fb fb fc fc fc fc fc fc fc fc 00 00 00 00 00 00 [ 34.258954] ffff88800e28d200: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 fc [ 34.259857] ================================================================== [ 34.260945] Disabling lock debugging due to kernel taint Debian GNU/Linux 11 syzkaller ttyS0 syzkaller login: [ 36.103223] BUG: Bad rss-counter state mm:0000000069d271d6 type:MM_FILEPAGES val:33 [ 36.104045] BUG: Bad rss-counter state mm:0000000069d271d6 type:MM_ANONPAGES val:22 [ 36.485218] BUG: Bad rss-counter state mm:00000000ec1b7d40 type:MM_FILEPAGES val:33 [ 36.485896] BUG: Bad rss-counter state mm:00000000ec1b7d40 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:56405' (ECDSA) to the list of known hosts. 2023/06/19 18:23:58 fuzzer started 2023/06/19 18:23:58 dialing manager at localhost:44161 2023/06/19 18:23:58 checking machine... 2023/06/19 18:23:58 checking revisions... [ 37.221574] kmemleak: Automatic memory scanning thread ended 2023/06/19 18:23:58 testing simple program... [ 37.266415] cgroup: Unknown subsys name 'net' [ 37.306942] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 18:23:48 Registers: info registers vcpu 0 RAX=0000000000000000 RBX=ffff888008cdc400 RCX=0000000000000000 RDX=1ffff1100137301c RSI=ffffffff83aae613 RDI=ffff888008f86014 RBP=ffff888008f86000 RSP=ffff88800f5c73d0 R8 =0000000000000004 R9 =0000000000000000 R10=ffff888008f86018 R11=00000000000b6996 R12=ffff888016603000 R13=ffff888008f86012 R14=ffff88800f5c75a8 R15=0000000000000001 RIP=ffffffff83aae7d0 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 00007fc1df739900 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=00007fc1dfcf0618 CR3=000000001bc10000 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=6e69676f6c5f6d61702c78756e696c65 XMM02=755f6d61702c74696d7265705f6d6170 XMM03=2c766e655f6d61702c7374696d696c5f XMM04=6d61702c766e655f6d61702c7374696d XMM05=78696e755f6d61702c74696d7265705f XMM06=6469756e69676f6c5f6d61702c78756e XMM07=672065736f6c635f6e6f69737365733a XMM08=61662029286e65706f5f746964756100 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=ffff88806cf35000 RBX=0000000000000001 RCX=ffffffff8450c50e RDX=ffffed100d9e6a01 RSI=0000000000000004 RDI=ffffffff812889a5 RBP=dffffc0000000000 RSP=ffff888008e27e70 R8 =0000000000000000 R9 =ffffed100d9e6a00 R10=ffff88806cf35003 R11=0000000000000001 R12=ffffffff85d3bed0 R13=1ffff110011c4fd3 R14=0000000000000000 R15=0000000000000000 RIP=ffffffff8450d49f 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=00007fe2f1f54c50 CR3=0000000013aca000 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=3951a86d9eec63984f4dfb9c7eb002c9 XMM02=ec2efd57dc4c00df000000000011c070 XMM03=91f0e589c427a649000000000011c140 XMM04=000134b4c4bfaa4900000000000ae988 XMM05=f6b1dea9df9eae030000000000134300 XMM06=806171799158d9670000000000133a70 XMM07=e042d86d42eb936e00000000001231b0 XMM08=91f0e589c427a649000000000011c140 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000