[ 24.029707] BUG: Bad rss-counter state mm:00000000a550950f type:MM_FILEPAGES val:33 [ 24.030917] BUG: Bad rss-counter state mm:00000000a550950f type:MM_ANONPAGES val:22 [ 24.067536] ================================================================== [ 24.068451] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 24.069400] Read of size 8 at addr ffff88801b93b310 by task sshd/219 [ 24.070319] [ 24.070540] CPU: 0 PID: 219 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 24.071407] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 24.072408] Call Trace: [ 24.072729] [ 24.073014] dump_stack_lvl+0x91/0xf0 [ 24.073507] print_report+0xcc/0x620 [ 24.073998] ? __virt_addr_valid+0x102/0x340 [ 24.074551] ? vma_interval_tree_remove+0xc75/0xec0 [ 24.075172] ? vma_interval_tree_remove+0xc75/0xec0 [ 24.075789] kasan_report+0xbe/0xf0 [ 24.076281] ? vma_interval_tree_remove+0xc75/0xec0 [ 24.076927] vma_interval_tree_remove+0xc75/0xec0 [ 24.077534] vma_prepare+0xc54/0x11a0 [ 24.078013] __split_vma+0x5af/0x950 [ 24.078488] ? __pfx___split_vma+0x10/0x10 [ 24.079023] ? find_held_lock+0x2c/0x110 [ 24.079549] do_vmi_align_munmap+0x2ba/0x11f0 [ 24.080126] ? lock_is_held_type+0x9f/0x120 [ 24.080672] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 24.081284] ? mtree_range_walk+0x632/0x900 [ 24.081877] ? mas_walk+0x5c7/0x7c0 [ 24.082366] do_vmi_munmap+0x1f1/0x2b0 [ 24.082872] mmap_region+0x1f9/0x2660 [ 24.083363] ? vm_mmap_pgoff+0x15c/0x3a0 [ 24.083900] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 24.084642] ? __pfx_lock_acquire+0x10/0x10 [ 24.085186] ? __pfx_mmap_region+0x10/0x10 [ 24.085718] ? security_mmap_addr+0x7d/0xa0 [ 24.086253] ? get_unmapped_area+0x1f5/0x3f0 [ 24.086804] do_mmap+0x854/0xf00 [ 24.087244] vm_mmap_pgoff+0x1a6/0x3a0 [ 24.087738] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 24.088327] ksys_mmap_pgoff+0x3af/0x500 [ 24.088876] do_syscall_64+0x3f/0x90 [ 24.089383] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 24.090045] RIP: 0033:0x7f0c73909d82 [ 24.090509] 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 [ 24.092697] RSP: 002b:00007ffc80db74d8 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 24.093616] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f0c73909d82 [ 24.094473] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f0c72d43000 [ 24.095323] RBP: 00007f0c72d43000 R08: 0000000000000009 R09: 0000000000001000 [ 24.096186] R10: 0000000000000812 R11: 0000000000000206 R12: 000055cd33dc5f70 [ 24.097031] R13: 00007ffc80db74f0 R14: 00007ffc80db7520 R15: 00007ffc80db7880 [ 24.097899] [ 24.098194] [ 24.098409] Allocated by task 210: [ 24.098839] kasan_save_stack+0x22/0x50 [ 24.099342] kasan_set_track+0x25/0x30 [ 24.099838] __kasan_slab_alloc+0x59/0x70 [ 24.100371] kmem_cache_alloc+0x16b/0x370 [ 24.100895] vm_area_dup+0x20/0x160 [ 24.101353] __split_vma+0x170/0x950 [ 24.101829] split_vma+0xc6/0x110 [ 24.102267] mprotect_fixup+0x8d2/0xb30 [ 24.102776] do_mprotect_pkey+0x87e/0xd40 [ 24.103296] __x64_sys_mprotect+0x78/0xc0 [ 24.103834] do_syscall_64+0x3f/0x90 [ 24.104341] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 24.104984] [ 24.105201] Freed by task 210: [ 24.105592] kasan_save_stack+0x22/0x50 [ 24.106097] kasan_set_track+0x25/0x30 [ 24.106595] kasan_save_free_info+0x2b/0x50 [ 24.107134] __kasan_slab_free+0x10a/0x190 [ 24.107666] kmem_cache_free+0x10d/0x4d0 [ 24.108182] rcu_core+0x8c8/0x2860 [ 24.108630] __do_softirq+0x1b7/0x7d4 [ 24.109108] [ 24.109323] Last potentially related work creation: [ 24.109915] kasan_save_stack+0x22/0x50 [ 24.110418] __kasan_record_aux_stack+0x8e/0xa0 [ 24.111011] __call_rcu_common.constprop.0+0x6a/0xb90 [ 24.111655] remove_vma+0x139/0x170 [ 24.112114] do_vmi_align_munmap+0xd4a/0x11f0 [ 24.112680] do_vmi_munmap+0x1f1/0x2b0 [ 24.113169] __vm_munmap+0x138/0x3a0 [ 24.113634] __x64_sys_munmap+0x59/0x80 [ 24.114158] do_syscall_64+0x3f/0x90 [ 24.114775] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 24.115428] [ 24.115651] The buggy address belongs to the object at ffff88801b93b2b8 [ 24.115651] which belongs to the cache vm_area_struct of size 168 [ 24.117141] The buggy address is located 88 bytes inside of [ 24.117141] freed 168-byte region [ffff88801b93b2b8, ffff88801b93b360) [ 24.118558] [ 24.118774] The buggy address belongs to the physical page: [ 24.119446] page:00000000b273f704 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x1b93b [ 24.120553] memcg:ffff88801b8cac01 [ 24.120980] flags: 0x100000000000200(slab|node=0|zone=1) [ 24.121631] page_type: 0xffffffff() [ 24.122091] raw: 0100000000000200 ffff8880087a0c80 dead000000000122 0000000000000000 [ 24.123016] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88801b8cac01 [ 24.123951] page dumped because: kasan: bad access detected [ 24.124611] [ 24.124828] Memory state around the buggy address: [ 24.125414] ffff88801b93b200: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 fc [ 24.126272] ffff88801b93b280: fc fc fc fc fc fc fc fa fb fb fb fb fb fb fb fb [ 24.127125] >ffff88801b93b300: fb fb fb fb fb fb fb fb fb fb fb fb fc fc fc fc [ 24.128002] ^ [ 24.128474] ffff88801b93b380: fc fc fc fc fa fb fb fb fb fb fb fb fb fb fb fb [ 24.129339] ffff88801b93b400: fb fb fb fb fb fb fb fb fb fc fc fc fc fc fc fc [ 24.130189] ================================================================== [ 24.132692] Disabling lock debugging due to kernel taint Debian GNU/Linux 11 syzkaller ttyS0 syzkaller login: [ 26.112044] BUG: Bad rss-counter state mm:0000000080594fdf type:MM_FILEPAGES val:33 [ 26.113373] BUG: Bad rss-counter state mm:0000000080594fdf type:MM_ANONPAGES val:22 [ 26.619796] BUG: Bad rss-counter state mm:000000003845654f type:MM_FILEPAGES val:33 [ 26.621008] BUG: Bad rss-counter state mm:000000003845654f type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:23723' (ECDSA) to the list of known hosts. 2023/06/21 05:12:54 fuzzer started 2023/06/21 05:12:54 dialing manager at localhost:36067 2023/06/21 05:12:54 checking machine... 2023/06/21 05:12:54 checking revisions... [ 27.293998] kmemleak: Automatic memory scanning thread ended 2023/06/21 05:12:54 testing simple program... [ 27.342816] cgroup: Unknown subsys name 'net' [ 27.437896] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 05:12:53 Registers: info registers vcpu 0 RAX=dffffc0000000000 RBX=ffffffff813ad470 RCX=0000000000000001 RDX=1ffff1100d9c135e RSI=ffffffff81809add RDI=ffff88806ce09b60 RBP=ffff88806ce09b30 RSP=ffff88806ce09a88 R8 =0000000000000001 R9 =ffff88806ce09ad8 R10=0000000000038001 R11=0000000000020db7 R12=ffff88806ce09b60 R13=0000000000000000 R14=ffffffff8542a6c0 R15=ffff88800fc30d90 RIP=ffffffff813ad47f RFL=00000286 [--S--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 0000000000000000 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=00007fd0b9429a10 CR3=000000000c4d6000 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=2033353a32313a3530203132206e754a XMM01=73732878696e755f6d6170203a5d3832 XMM02=65736f6c63206e6f6973736573203a29 XMM03=755f6d6170203a5d3832325b64687373 XMM04=69662068637573206f4e203a656c6163 XMM05=3a656c696620766e65206e65706f206f XMM06=65733a6468737328766e655f6d617020 XMM07=6b7a79732033353a32313a3530203132 XMM08=3d656e696c646d632022656369767265 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=0000000000000000 RBX=0000000000000000 RCX=ffffffff8209b739 RDX=0000000000000000 RSI=0000000000000000 RDI=0000000000000000 RBP=ffffea000076ad40 RSP=ffff888016277cd0 R8 =0000000000000000 R9 =fffffbfff0ba7a6a R10=ffffffff85d3d357 R11=0000000000000000 R12=ffffea000076ad40 R13=ffff88800c7bda18 R14=0000000000000001 R15=0100000000000000 RIP=ffffffff814c0408 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 =0000 0000000000000000 00000000 00000000 DS =0000 0000000000000000 00000000 00000000 FS =0000 00007fd2892a9900 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=00007ffe80be3bbc CR3=000000000db60000 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=00000000000000000000000000000000 XMM02=12cf4a1f421762fe5ba497d57c2ccc27 XMM03=6b7a7debf5da2d98b14cf17dbd9cb5a3 XMM04=4aad11348af20932a7e85d253a8d5a55 XMM05=00000000000000000000000000000000 XMM06=4a7a11348ada0932a74c5d253a8d5a55 XMM07=672065736f6c635f6e6f69737365733a XMM08=652075253d64692073253d706f000000 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000