[ 31.388970] BUG: Bad rss-counter state mm:000000007f350349 type:MM_FILEPAGES val:33 [ 31.390204] BUG: Bad rss-counter state mm:000000007f350349 type:MM_ANONPAGES val:22 [ 31.557270] ================================================================== [ 31.558145] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 31.559054] Read of size 8 at addr ffff88800edec968 by task sshd/220 [ 31.559772] [ 31.559984] CPU: 0 PID: 220 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 31.560875] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 31.561789] Call Trace: [ 31.562091] [ 31.562369] dump_stack_lvl+0x91/0xf0 [ 31.562844] print_report+0xcc/0x620 [ 31.563317] ? __virt_addr_valid+0x102/0x340 [ 31.563844] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.564433] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.565024] kasan_report+0xbe/0xf0 [ 31.565485] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.566077] vma_interval_tree_remove+0xc75/0xec0 [ 31.566655] vma_prepare+0xc54/0x11a0 [ 31.567115] __split_vma+0x5af/0x950 [ 31.567568] ? __pfx___split_vma+0x10/0x10 [ 31.568089] ? find_held_lock+0x2c/0x110 [ 31.568597] do_vmi_align_munmap+0x2ba/0x11f0 [ 31.569136] ? lock_is_held_type+0x9f/0x120 [ 31.569665] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 31.570250] ? mtree_range_walk+0x632/0x900 [ 31.570794] ? mas_walk+0x5c7/0x7c0 [ 31.571270] do_vmi_munmap+0x1f1/0x2b0 [ 31.571753] mmap_region+0x1f9/0x2660 [ 31.572233] ? vm_mmap_pgoff+0x15c/0x3a0 [ 31.572720] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 31.573404] ? __pfx_lock_acquire+0x10/0x10 [ 31.573923] ? __pfx_mmap_region+0x10/0x10 [ 31.574426] ? security_mmap_addr+0x7d/0xa0 [ 31.574949] ? get_unmapped_area+0x1f5/0x3f0 [ 31.575487] do_mmap+0x854/0xf00 [ 31.575914] vm_mmap_pgoff+0x1a6/0x3a0 [ 31.576401] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 31.576947] ksys_mmap_pgoff+0x3af/0x500 [ 31.577435] do_syscall_64+0x3f/0x90 [ 31.577889] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.578511] RIP: 0033:0x7f53e8df5d82 [ 31.578971] 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 [ 31.581005] RSP: 002b:00007ffe418b1538 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 31.581888] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f53e8df5d82 [ 31.582703] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f53e822f000 [ 31.583548] RBP: 00007f53e822f000 R08: 0000000000000009 R09: 0000000000001000 [ 31.584362] R10: 0000000000000812 R11: 0000000000000206 R12: 000055bcac800d90 [ 31.585181] R13: 00007ffe418b1550 R14: 00007ffe418b1580 R15: 00007ffe418b18e0 [ 31.586009] [ 31.586304] [ 31.586518] Allocated by task 213: [ 31.586930] kasan_save_stack+0x22/0x50 [ 31.587445] kasan_set_track+0x25/0x30 [ 31.587934] __kasan_slab_alloc+0x59/0x70 [ 31.588438] kmem_cache_alloc+0x16b/0x370 [ 31.588940] vm_area_dup+0x20/0x160 [ 31.589377] __split_vma+0x170/0x950 [ 31.589822] split_vma+0xc6/0x110 [ 31.590245] mprotect_fixup+0x8d2/0xb30 [ 31.590733] do_mprotect_pkey+0x87e/0xd40 [ 31.591267] __x64_sys_mprotect+0x78/0xc0 [ 31.591764] do_syscall_64+0x3f/0x90 [ 31.592228] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.592863] [ 31.593072] Freed by task 213: [ 31.593444] kasan_save_stack+0x22/0x50 [ 31.593942] kasan_set_track+0x25/0x30 [ 31.594416] kasan_save_free_info+0x2b/0x50 [ 31.594919] __kasan_slab_free+0x10a/0x190 [ 31.595448] kmem_cache_free+0x10d/0x4d0 [ 31.595951] rcu_core+0x8c8/0x2860 [ 31.596372] __do_softirq+0x1b7/0x7d4 [ 31.596842] [ 31.597046] Last potentially related work creation: [ 31.597609] kasan_save_stack+0x22/0x50 [ 31.598108] __kasan_record_aux_stack+0x8e/0xa0 [ 31.598652] __call_rcu_common.constprop.0+0x6a/0xb90 [ 31.599310] remove_vma+0x139/0x170 [ 31.599741] do_vmi_align_munmap+0xd4a/0x11f0 [ 31.600262] do_vmi_munmap+0x1f1/0x2b0 [ 31.600732] __vm_munmap+0x138/0x3a0 [ 31.601176] __x64_sys_munmap+0x59/0x80 [ 31.601650] do_syscall_64+0x3f/0x90 [ 31.602102] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.602724] [ 31.602933] The buggy address belongs to the object at ffff88800edec910 [ 31.602933] which belongs to the cache vm_area_struct of size 168 [ 31.604330] The buggy address is located 88 bytes inside of [ 31.604330] freed 168-byte region [ffff88800edec910, ffff88800edec9b8) [ 31.605648] [ 31.605854] The buggy address belongs to the physical page: [ 31.606482] page:000000000ac4bd0e refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xedec [ 31.607509] memcg:ffff88800da75701 [ 31.607915] flags: 0x100000000000200(slab|node=0|zone=1) [ 31.608545] page_type: 0xffffffff() [ 31.608988] raw: 0100000000000200 ffff8880087a0c80 dead000000000122 0000000000000000 [ 31.609879] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800da75701 [ 31.610754] page dumped because: kasan: bad access detected [ 31.611414] [ 31.611618] Memory state around the buggy address: [ 31.612165] ffff88800edec800: fc fc fc fc fc 00 00 00 00 00 00 00 00 00 00 00 [ 31.612994] ffff88800edec880: 00 00 00 00 00 00 00 00 00 00 fc fc fc fc fc fc [ 31.613820] >ffff88800edec900: fc fc fa fb fb fb fb fb fb fb fb fb fb fb fb fb [ 31.614634] ^ [ 31.615396] ffff88800edec980: fb fb fb fb fb fb fb fc fc fc fc fc fc fc fc fa [ 31.616220] ffff88800edeca00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 31.617039] ================================================================== [ 31.617978] Disabling lock debugging due to kernel taint Debian GNU/Linux 11 syzkaller ttyS0 syzkaller login: [ 34.020622] BUG: Bad rss-counter state mm:000000001ba6efe0 type:MM_FILEPAGES val:33 [ 34.021644] BUG: Bad rss-counter state mm:000000001ba6efe0 type:MM_ANONPAGES val:22 [ 34.502393] BUG: Bad rss-counter state mm:00000000ab272c34 type:MM_FILEPAGES val:33 [ 34.503581] BUG: Bad rss-counter state mm:00000000ab272c34 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:39115' (ECDSA) to the list of known hosts. 2023/06/20 18:20:10 fuzzer started 2023/06/20 18:20:10 dialing manager at localhost:36067 2023/06/20 18:20:10 checking machine... 2023/06/20 18:20:10 checking revisions... [ 35.249166] kmemleak: Automatic memory scanning thread ended 2023/06/20 18:20:10 testing simple program... [ 35.291526] cgroup: Unknown subsys name 'net' [ 35.330262] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 18:20:10 Registers: info registers vcpu 0 RAX=dffffc0000000000 RBX=0000000000000000 RCX=ffffffff815342db RDX=0000000000000000 RSI=0000000000000008 RDI=ffffffff85d3d350 RBP=1ffffffff0ba7a6a RSP=ffff88800fc5fb68 R8 =0000000000000000 R9 =1ffffffff0ba7a6a R10=ffffffff85d3d357 R11=ffffffff81806f71 R12=ffff888008442000 R13=ffff88806ce3d100 R14=ffff88806ce3d100 R15=ffff88806ce3d0e0 RIP=ffffffff8180f091 RFL=00000017 [----APC] 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 00007ff9e35d1900 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=00007ff9e3b890b0 CR3=000000000eac6000 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=25252525252525252525252525252525 XMM01=000000000000000000000000000000ff XMM02=000000000000000000000000000000ff XMM03=5320444f4854454d5f54505952434e45 XMM04=40404040404040404040404040404040 XMM05=5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a XMM06=20202020202020202020202020202020 XMM07=00000000000000000000000000000000 XMM08=662079726f6d656d20666f2074756f00 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=ffffffff812135de RBX=0000000000000002 RCX=0000000000000001 RDX=ffff88806cf09a68 RSI=ffffffff812135de RDI=ffff88806cf09a20 RBP=ffff88806cf09a78 RSP=ffff88806cf099b0 R8 =0000000000000001 R9 =ffff88806cf09a60 R10=0000000000038001 R11=000000000000fc0c R12=ffff88806cf09ae8 R13=ffff88806cf09a68 R14=ffff888008d951c0 R15=ffff88806cf09a20 RIP=ffffffff81130641 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 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=00007fca0a9dd9d0 CR3=00000000136fa000 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=516a2e78decadb89da4abe0d1fa35f63 XMM02=000000000011af08ec2efd57dc4c00df XMM03=00000000001218c8f1893ceaaaa8bcc9 XMM04=2abb9de40d8c80a000000000000ae988 XMM05=95c88df57e13249500000000001321d0 XMM06=4fda316b135da52b0000000000131370 XMM07=e042d86d42eb936e0000000000121b48 XMM08=f1893ceaaaa8bcc9000000000011af68 XMM09=00000000000000000000000000000000 XMM10=20200000000020202020202020200000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000