[ 23.888262] BUG: Bad rss-counter state mm:000000008ee44d2f type:MM_FILEPAGES val:33 [ 23.889285] BUG: Bad rss-counter state mm:000000008ee44d2f type:MM_ANONPAGES val:22 [ 24.045445] ================================================================== [ 24.046370] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 24.047317] Read of size 8 at addr ffff88801ab8e4e0 by task sshd/219 [ 24.048095] [ 24.048329] CPU: 0 PID: 219 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 24.049318] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 24.050299] Call Trace: [ 24.050623] [ 24.050941] dump_stack_lvl+0x91/0xf0 [ 24.051444] print_report+0xcc/0x620 [ 24.051938] ? __virt_addr_valid+0x102/0x340 [ 24.052511] ? vma_interval_tree_remove+0xc75/0xec0 [ 24.053143] ? vma_interval_tree_remove+0xc75/0xec0 [ 24.053790] kasan_report+0xbe/0xf0 [ 24.054286] ? vma_interval_tree_remove+0xc75/0xec0 [ 24.054933] vma_interval_tree_remove+0xc75/0xec0 [ 24.055569] vma_prepare+0xc54/0x11a0 [ 24.056059] __split_vma+0x5af/0x950 [ 24.056550] ? __pfx___split_vma+0x10/0x10 [ 24.057098] ? find_held_lock+0x2c/0x110 [ 24.057632] do_vmi_align_munmap+0x2ba/0x11f0 [ 24.058223] ? lock_is_held_type+0x9f/0x120 [ 24.058796] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 24.059432] ? mtree_range_walk+0x632/0x900 [ 24.060002] ? mas_walk+0x5c7/0x7c0 [ 24.060514] do_vmi_munmap+0x1f1/0x2b0 [ 24.061024] mmap_region+0x1f9/0x2660 [ 24.061527] ? vm_mmap_pgoff+0x15c/0x3a0 [ 24.062064] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 24.062807] ? __pfx_lock_acquire+0x10/0x10 [ 24.063361] ? __pfx_mmap_region+0x10/0x10 [ 24.063912] ? security_mmap_addr+0x7d/0xa0 [ 24.064483] ? get_unmapped_area+0x1f5/0x3f0 [ 24.065059] do_mmap+0x854/0xf00 [ 24.065516] vm_mmap_pgoff+0x1a6/0x3a0 [ 24.066048] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 24.066634] ksys_mmap_pgoff+0x3af/0x500 [ 24.067170] do_syscall_64+0x3f/0x90 [ 24.067672] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 24.068368] RIP: 0033:0x7f54e9900d82 [ 24.068849] 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 [ 24.071179] RSP: 002b:00007ffdb38e38a8 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 24.072114] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f54e9900d82 [ 24.072990] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f54e8d3a000 [ 24.073861] RBP: 00007f54e8d3a000 R08: 0000000000000009 R09: 0000000000001000 [ 24.074740] R10: 0000000000000812 R11: 0000000000000206 R12: 000055f7efa30ec0 [ 24.075612] R13: 00007ffdb38e38c0 R14: 00007ffdb38e38f0 R15: 00007ffdb38e3c50 [ 24.076527] [ 24.076834] [ 24.077060] Allocated by task 208: [ 24.077513] kasan_save_stack+0x22/0x50 [ 24.078045] kasan_set_track+0x25/0x30 [ 24.078564] __kasan_slab_alloc+0x59/0x70 [ 24.079115] kmem_cache_alloc+0x16b/0x370 [ 24.079659] vm_area_dup+0x20/0x160 [ 24.080166] __split_vma+0x170/0x950 [ 24.080664] split_vma+0xc6/0x110 [ 24.081131] mprotect_fixup+0x8d2/0xb30 [ 24.081681] do_mprotect_pkey+0x87e/0xd40 [ 24.082232] __x64_sys_mprotect+0x78/0xc0 [ 24.082785] do_syscall_64+0x3f/0x90 [ 24.083291] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 24.083980] [ 24.084215] Freed by task 208: [ 24.084664] kasan_save_stack+0x22/0x50 [ 24.085238] kasan_set_track+0x25/0x30 [ 24.085801] kasan_save_free_info+0x2b/0x50 [ 24.086422] __kasan_slab_free+0x10a/0x190 [ 24.087011] kmem_cache_free+0x10d/0x4d0 [ 24.087548] rcu_core+0x8c8/0x2860 [ 24.088024] __do_softirq+0x1b7/0x7d4 [ 24.088540] [ 24.088770] Last potentially related work creation: [ 24.089394] kasan_save_stack+0x22/0x50 [ 24.089953] __kasan_record_aux_stack+0x8e/0xa0 [ 24.090574] __call_rcu_common.constprop.0+0x6a/0xb90 [ 24.091261] remove_vma+0x139/0x170 [ 24.091744] do_vmi_align_munmap+0xd4a/0x11f0 [ 24.092368] do_vmi_munmap+0x1f1/0x2b0 [ 24.092890] __vm_munmap+0x138/0x3a0 [ 24.093404] __x64_sys_munmap+0x59/0x80 [ 24.093953] do_syscall_64+0x3f/0x90 [ 24.094463] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 24.095163] [ 24.095400] The buggy address belongs to the object at ffff88801ab8e488 [ 24.095400] which belongs to the cache vm_area_struct of size 168 [ 24.097001] The buggy address is located 88 bytes inside of [ 24.097001] freed 168-byte region [ffff88801ab8e488, ffff88801ab8e530) [ 24.098540] [ 24.098776] The buggy address belongs to the physical page: [ 24.099498] page:00000000952029db refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x1ab8e [ 24.100745] memcg:ffff88801aadea01 [ 24.101224] flags: 0x100000000000200(slab|node=0|zone=1) [ 24.101909] page_type: 0xffffffff() [ 24.102387] raw: 0100000000000200 ffff8880087a0c80 dead000000000122 0000000000000000 [ 24.103363] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88801aadea01 [ 24.104320] page dumped because: kasan: bad access detected [ 24.105014] [ 24.105245] Memory state around the buggy address: [ 24.105863] ffff88801ab8e380: fc fc fc fc 00 00 00 00 00 00 00 00 00 00 00 00 [ 24.106784] ffff88801ab8e400: 00 00 00 00 00 00 00 00 00 fc fc fc fc fc fc fc [ 24.107705] >ffff88801ab8e480: fc fa fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 24.108709] ^ [ 24.109591] ffff88801ab8e500: fb fb fb fb fb fb fc fc fc fc fc fc fc fc fa fb [ 24.110581] ffff88801ab8e580: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 24.111575] ================================================================== [ 24.112783] Disabling lock debugging due to kernel taint Debian GNU/Linux 11 syzkaller ttyS0 syzkaller login: [ 25.917645] BUG: Bad rss-counter state mm:000000007b5c95f2 type:MM_FILEPAGES val:33 [ 25.918407] BUG: Bad rss-counter state mm:000000007b5c95f2 type:MM_ANONPAGES val:22 [ 26.352063] BUG: Bad rss-counter state mm:00000000bbfbff56 type:MM_FILEPAGES val:33 [ 26.353086] BUG: Bad rss-counter state mm:00000000bbfbff56 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:3466' (ECDSA) to the list of known hosts. 2023/06/20 14:20:59 fuzzer started 2023/06/20 14:20:59 dialing manager at localhost:36067 2023/06/20 14:20:59 checking machine... 2023/06/20 14:20:59 checking revisions... [ 27.073632] kmemleak: Automatic memory scanning thread ended 2023/06/20 14:20:59 testing simple program... [ 27.116733] cgroup: Unknown subsys name 'net' [ 27.163490] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 14:20:59 Registers: info registers vcpu 0 RAX=ffff88800f568001 RBX=ffff88800f567878 RCX=0000000000000001 RDX=ffff88800f567b01 RSI=ffff88800f567bc0 RDI=ffff88800f567888 RBP=ffff88800f567bc0 RSP=ffff88800f5677d0 R8 =ffffffff86138e90 R9 =ffff88800f5678b8 R10=0000000000038001 R11=0000000000020d8f R12=0000000000000008 R13=ffff88800f560000 R14=ffff88800f567bc8 R15=ffff88800f567878 RIP=ffffffff8113048d RFL=00000293 [--S-A-C] 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 00007f2c4e91f900 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=00007ffca7039000 CR3=000000000ec62000 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=74696d7265705f6d61703d73726f746e XMM02=000000000000000000000000000000ff XMM03=5320444f4854454d5f54505952434e45 XMM04=40404040404040404040404040404040 XMM05=5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a XMM06=20202020202020202020202020202020 XMM07=00000000000000000000000000000000 XMM08=61662029286e65706f5f746964756100 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=dffffc0000000000 RBX=00000000000361a0 RCX=ffff88806cf361a0 RDX=0000000000000000 RSI=1ffff1100d9e6c3c RDI=ffffffff818305bd RBP=ffff88800d2d2e00 RSP=ffff88806cf09db8 R8 =0000000000000000 R9 =fffffbfff0ba7a6a R10=ffffffff85d3d357 R11=0000000000000000 R12=0000000000000088 R13=ffffffff87b6a200 R14=ffff88806cf361a0 R15=ffff88806cf361e0 RIP=ffffffff81830894 RFL=00000046 [---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=00007f83f3e2f138 CR3=000000000ec6e000 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=2039353a30323a3431203032206e754a XMM01=73732878696e755f6d6170203a5d3832 XMM02=65736f6c63206e6f6973736573203a29 XMM03=755f6d6170203a5d3832325b64687373 XMM04=69662068637573206f4e203a656c6163 XMM05=3a656c696620766e65206e65706f206f XMM06=65733a6468737328766e655f6d617020 XMM07=6b7a79732038353a30323a3431203032 XMM08=3d656e696c646d632022656369767265 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000