[ 31.748589] BUG: Bad rss-counter state mm:00000000dc8e528e type:MM_FILEPAGES val:33 [ 31.749989] BUG: Bad rss-counter state mm:00000000dc8e528e type:MM_ANONPAGES val:22 [ 31.788716] ================================================================== [ 31.789699] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 31.790751] Read of size 8 at addr ffff888017ec7968 by task sshd/219 [ 31.791618] [ 31.791956] CPU: 1 PID: 219 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 31.792830] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 31.793998] Call Trace: [ 31.794322] [ 31.794609] dump_stack_lvl+0x91/0xf0 [ 31.795102] print_report+0xcc/0x620 [ 31.795599] ? __virt_addr_valid+0x102/0x340 [ 31.796160] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.796766] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.797369] kasan_report+0xbe/0xf0 [ 31.797840] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.798450] vma_interval_tree_remove+0xc75/0xec0 [ 31.799046] vma_prepare+0xc54/0x11a0 [ 31.799540] __split_vma+0x5af/0x950 [ 31.800005] ? __pfx___split_vma+0x10/0x10 [ 31.800527] ? find_held_lock+0x2c/0x110 [ 31.801042] do_vmi_align_munmap+0x2ba/0x11f0 [ 31.801596] ? lock_is_held_type+0x9f/0x120 [ 31.802138] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 31.802736] ? mtree_range_walk+0x632/0x900 [ 31.803283] ? mas_walk+0x5c7/0x7c0 [ 31.803762] do_vmi_munmap+0x1f1/0x2b0 [ 31.804242] mmap_region+0x1f9/0x2660 [ 31.804718] ? vm_mmap_pgoff+0x15c/0x3a0 [ 31.805221] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 31.805916] ? __pfx_lock_acquire+0x10/0x10 [ 31.806436] ? __pfx_mmap_region+0x10/0x10 [ 31.806950] ? security_mmap_addr+0x7d/0xa0 [ 31.807472] ? get_unmapped_area+0x1f5/0x3f0 [ 31.808014] do_mmap+0x854/0xf00 [ 31.808442] vm_mmap_pgoff+0x1a6/0x3a0 [ 31.808928] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 31.809477] ksys_mmap_pgoff+0x3af/0x500 [ 31.809974] do_syscall_64+0x3f/0x90 [ 31.810442] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.811072] RIP: 0033:0x7f0a67097d82 [ 31.811539] 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 [ 31.813599] RSP: 002b:00007ffcbd166c08 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 31.814476] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f0a67097d82 [ 31.815301] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f0a664d1000 [ 31.816132] RBP: 00007f0a664d1000 R08: 0000000000000009 R09: 0000000000001000 [ 31.816952] R10: 0000000000000812 R11: 0000000000000206 R12: 0000559695491ec0 [ 31.817773] R13: 00007ffcbd166c20 R14: 00007ffcbd166c50 R15: 00007ffcbd166fb0 [ 31.818603] [ 31.818891] [ 31.819105] Allocated by task 212: [ 31.819527] kasan_save_stack+0x22/0x50 [ 31.820020] kasan_set_track+0x25/0x30 [ 31.820507] __kasan_slab_alloc+0x59/0x70 [ 31.821031] kmem_cache_alloc+0x16b/0x370 [ 31.821554] vm_area_dup+0x20/0x160 [ 31.822006] __split_vma+0x170/0x950 [ 31.822468] split_vma+0xc6/0x110 [ 31.822904] mprotect_fixup+0x8d2/0xb30 [ 31.823418] do_mprotect_pkey+0x87e/0xd40 [ 31.823941] __x64_sys_mprotect+0x78/0xc0 [ 31.824461] do_syscall_64+0x3f/0x90 [ 31.824930] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.825573] [ 31.825787] Freed by task 212: [ 31.826171] kasan_save_stack+0x22/0x50 [ 31.826669] kasan_set_track+0x25/0x30 [ 31.827154] kasan_save_free_info+0x2b/0x50 [ 31.827692] __kasan_slab_free+0x10a/0x190 [ 31.828213] kmem_cache_free+0x10d/0x4d0 [ 31.828710] rcu_core+0x8c8/0x2860 [ 31.829144] __do_softirq+0x1b7/0x7d4 [ 31.829678] [ 31.829898] Last potentially related work creation: [ 31.830502] kasan_save_stack+0x22/0x50 [ 31.831023] __kasan_record_aux_stack+0x8e/0xa0 [ 31.831644] __call_rcu_common.constprop.0+0x6a/0xb90 [ 31.832313] remove_vma+0x139/0x170 [ 31.832780] do_vmi_align_munmap+0xd4a/0x11f0 [ 31.833351] do_vmi_munmap+0x1f1/0x2b0 [ 31.833855] __vm_munmap+0x138/0x3a0 [ 31.834330] __x64_sys_munmap+0x59/0x80 [ 31.834838] do_syscall_64+0x3f/0x90 [ 31.835327] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.836001] [ 31.836219] The buggy address belongs to the object at ffff888017ec7910 [ 31.836219] which belongs to the cache vm_area_struct of size 168 [ 31.837745] The buggy address is located 88 bytes inside of [ 31.837745] freed 168-byte region [ffff888017ec7910, ffff888017ec79b8) [ 31.839209] [ 31.839437] The buggy address belongs to the physical page: [ 31.840121] page:00000000db8f27c1 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x17ec7 [ 31.841258] memcg:ffff88800ea5a201 [ 31.841698] anon flags: 0x100000000000200(slab|node=0|zone=1) [ 31.842417] page_type: 0xffffffff() [ 31.842880] raw: 0100000000000200 ffff8880087a0c80 ffffea000039ea80 dead000000000007 [ 31.843796] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800ea5a201 [ 31.844676] page dumped because: kasan: bad access detected [ 31.845315] [ 31.845523] Memory state around the buggy address: [ 31.846088] ffff888017ec7800: fc fc fc fc fc fa fb fb fb fb fb fb fb fb fb fb [ 31.846941] ffff888017ec7880: fb fb fb fb fb fb fb fb fb fb fc fc fc fc fc fc [ 31.847809] >ffff888017ec7900: fc fc fa fb fb fb fb fb fb fb fb fb fb fb fb fb [ 31.848666] ^ [ 31.849456] ffff888017ec7980: fb fb fb fb fb fb fb fc fc fc fc fc fc fc fc 00 [ 31.850283] ffff888017ec7a00: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 31.851111] ================================================================== [ 31.852127] Disabling lock debugging due to kernel taint Debian GNU/Linux 11 syzkaller ttyS0 syzkaller login: [ 33.966198] BUG: Bad rss-counter state mm:00000000434824f2 type:MM_FILEPAGES val:33 [ 33.967475] BUG: Bad rss-counter state mm:00000000434824f2 type:MM_ANONPAGES val:22 [ 34.324265] BUG: Bad rss-counter state mm:00000000a93bcdb1 type:MM_FILEPAGES val:33 [ 34.325591] BUG: Bad rss-counter state mm:00000000a93bcdb1 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:30871' (ECDSA) to the list of known hosts. 2023/06/21 05:33:20 fuzzer started 2023/06/21 05:33:20 dialing manager at localhost:36067 2023/06/21 05:33:20 checking machine... 2023/06/21 05:33:20 checking revisions... [ 34.991192] kmemleak: Automatic memory scanning thread ended 2023/06/21 05:33:20 testing simple program... [ 35.037486] cgroup: Unknown subsys name 'net' [ 35.113033] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 05:33:19 Registers: info registers vcpu 0 RAX=ffff88806ce35000 RBX=0000000000000000 RCX=ffffffff8451250e RDX=ffffed100d9c6a01 RSI=0000000000000004 RDI=ffffffff81288ac5 RBP=dffffc0000000000 RSP=ffffffff85407e10 R8 =0000000000000000 R9 =ffffed100d9c6a00 R10=ffff88806ce35003 R11=ffff888008c04000 R12=ffffffff85d3d350 R13=1ffffffff0a80fc7 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 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=00007f46bb795600 CR3=000000000970e000 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=21bdf54cb4ec988c1743e9db9944d80d XMM02=2c67c8bc2e329bc3000000000011be30 XMM03=fb795ef6d65770560000000000122058 XMM04=ca1b9de5249e37fc00000000000ae988 XMM05=dfcdbad4f1609c370000000000131c18 XMM06=262f8c07a30c41970000000000130df0 XMM07=e042d86d42eb936e0000000000122330 XMM08=471f268c00195ba0000000000011be90 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=0000000000000000 RBX=1ffff11001ec9e85 RCX=0000000000000002 RDX=0000000000000001 RSI=0000000000000008 RDI=ffffffff8560b640 RBP=0000000000000000 RSP=ffff88800f64f418 R8 =0000000000000000 R9 =0000000000000000 R10=000000000000004f R11=00000b7700000b77 R12=0000000000000002 R13=0000000000000000 R14=ffffffff8560b640 R15=0000000000000000 RIP=ffffffff812d8f06 RFL=00000256 [---ZAP-] 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 00007f075404b900 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=00007ffd22e6f000 CR3=000000000b9c8000 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=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