[ 24.192866] BUG: Bad rss-counter state mm:000000008e4c2440 type:MM_FILEPAGES val:33 [ 24.194006] BUG: Bad rss-counter state mm:000000008e4c2440 type:MM_ANONPAGES val:22 [ 24.361228] ================================================================== [ 24.362119] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 24.363054] Read of size 8 at addr ffff8880165efc20 by task sshd/219 [ 24.363832] [ 24.364044] CPU: 1 PID: 219 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 24.365052] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 24.365998] Call Trace: [ 24.366311] [ 24.366593] dump_stack_lvl+0x91/0xf0 [ 24.367093] print_report+0xcc/0x620 [ 24.367580] ? __virt_addr_valid+0x102/0x340 [ 24.368121] ? vma_interval_tree_remove+0xc75/0xec0 [ 24.368723] ? vma_interval_tree_remove+0xc75/0xec0 [ 24.369334] kasan_report+0xbe/0xf0 [ 24.369800] ? vma_interval_tree_remove+0xc75/0xec0 [ 24.370417] vma_interval_tree_remove+0xc75/0xec0 [ 24.371010] vma_prepare+0xc54/0x11a0 [ 24.371516] __split_vma+0x5af/0x950 [ 24.371982] ? __pfx___split_vma+0x10/0x10 [ 24.372505] ? find_held_lock+0x2c/0x110 [ 24.373013] do_vmi_align_munmap+0x2ba/0x11f0 [ 24.373569] ? lock_is_held_type+0x9f/0x120 [ 24.374106] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 24.374707] ? mtree_range_walk+0x632/0x900 [ 24.375274] ? mas_walk+0x5c7/0x7c0 [ 24.375741] do_vmi_munmap+0x1f1/0x2b0 [ 24.376227] mmap_region+0x1f9/0x2660 [ 24.376711] ? vm_mmap_pgoff+0x15c/0x3a0 [ 24.377209] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 24.377909] ? __pfx_lock_acquire+0x10/0x10 [ 24.378434] ? __pfx_mmap_region+0x10/0x10 [ 24.378968] ? security_mmap_addr+0x7d/0xa0 [ 24.379500] ? get_unmapped_area+0x1f5/0x3f0 [ 24.380042] do_mmap+0x854/0xf00 [ 24.380469] vm_mmap_pgoff+0x1a6/0x3a0 [ 24.380968] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 24.381521] ksys_mmap_pgoff+0x3af/0x500 [ 24.382019] do_syscall_64+0x3f/0x90 [ 24.382490] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 24.383130] RIP: 0033:0x7f9504464d82 [ 24.383596] 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 [ 24.385714] RSP: 002b:00007ffefac008b8 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 24.386622] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f9504464d82 [ 24.387475] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f950389e000 [ 24.388317] RBP: 00007f950389e000 R08: 0000000000000009 R09: 0000000000001000 [ 24.389163] R10: 0000000000000812 R11: 0000000000000206 R12: 000055f02a2fdf70 [ 24.390009] R13: 00007ffefac008d0 R14: 00007ffefac00900 R15: 00007ffefac00c60 [ 24.390862] [ 24.391152] [ 24.391377] Allocated by task 210: [ 24.391801] kasan_save_stack+0x22/0x50 [ 24.392302] kasan_set_track+0x25/0x30 [ 24.392790] __kasan_slab_alloc+0x59/0x70 [ 24.393309] kmem_cache_alloc+0x16b/0x370 [ 24.393820] vm_area_dup+0x20/0x160 [ 24.394269] __split_vma+0x170/0x950 [ 24.394727] split_vma+0xc6/0x110 [ 24.395159] mprotect_fixup+0x8d2/0xb30 [ 24.395678] do_mprotect_pkey+0x87e/0xd40 [ 24.396189] __x64_sys_mprotect+0x78/0xc0 [ 24.396713] do_syscall_64+0x3f/0x90 [ 24.397187] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 24.397822] [ 24.398035] Freed by task 210: [ 24.398427] kasan_save_stack+0x22/0x50 [ 24.398928] kasan_set_track+0x25/0x30 [ 24.399423] kasan_save_free_info+0x2b/0x50 [ 24.399945] __kasan_slab_free+0x10a/0x190 [ 24.400479] kmem_cache_free+0x10d/0x4d0 [ 24.400976] rcu_core+0x8c8/0x2860 [ 24.401411] __do_softirq+0x1b7/0x7d4 [ 24.401891] [ 24.402105] Last potentially related work creation: [ 24.402691] kasan_save_stack+0x22/0x50 [ 24.403188] __kasan_record_aux_stack+0x8e/0xa0 [ 24.403753] __call_rcu_common.constprop.0+0x6a/0xb90 [ 24.404394] remove_vma+0x139/0x170 [ 24.404842] do_vmi_align_munmap+0xd4a/0x11f0 [ 24.405454] do_vmi_munmap+0x1f1/0x2b0 [ 24.405930] __vm_munmap+0x138/0x3a0 [ 24.406397] __x64_sys_munmap+0x59/0x80 [ 24.406883] do_syscall_64+0x3f/0x90 [ 24.407357] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 24.407999] [ 24.408208] The buggy address belongs to the object at ffff8880165efbc8 [ 24.408208] which belongs to the cache vm_area_struct of size 168 [ 24.409662] The buggy address is located 88 bytes inside of [ 24.409662] freed 168-byte region [ffff8880165efbc8, ffff8880165efc70) [ 24.411075] [ 24.411295] The buggy address belongs to the physical page: [ 24.411944] page:0000000056dbcb62 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x165ef [ 24.413036] memcg:ffff88800ca02801 [ 24.413463] anon flags: 0x100000000000200(slab|node=0|zone=1) [ 24.414159] page_type: 0xffffffff() [ 24.414607] raw: 0100000000000200 ffff8880087a0c80 0000000000000000 0000000000000001 [ 24.415527] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800ca02801 [ 24.416447] page dumped because: kasan: bad access detected [ 24.417105] [ 24.417318] Memory state around the buggy address: [ 24.417900] ffff8880165efb00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 24.418748] ffff8880165efb80: fb fc fc fc fc fc fc fc fc fa fb fb fb fb fb fb [ 24.419598] >ffff8880165efc00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fc fc [ 24.420446] ^ [ 24.420971] ffff8880165efc80: fc fc fc fc fc fc 00 00 00 00 00 00 00 00 00 00 [ 24.421818] ffff8880165efd00: 00 00 00 00 00 00 00 00 00 00 00 fc fc fc fc fc [ 24.422669] ================================================================== [ 24.423612] Disabling lock debugging due to kernel taint Debian GNU/Linux 11 syzkaller ttyS0 syzkaller login: [ 26.864980] BUG: Bad rss-counter state mm:0000000094f82cde type:MM_FILEPAGES val:33 [ 26.866212] BUG: Bad rss-counter state mm:0000000094f82cde type:MM_ANONPAGES val:22 [ 27.313977] BUG: Bad rss-counter state mm:00000000842426fc type:MM_FILEPAGES val:33 [ 27.314996] BUG: Bad rss-counter state mm:00000000842426fc type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:48910' (ECDSA) to the list of known hosts. 2023/06/20 20:33:35 fuzzer started 2023/06/20 20:33:35 dialing manager at localhost:36067 2023/06/20 20:33:35 checking machine... 2023/06/20 20:33:35 checking revisions... [ 28.055296] kmemleak: Automatic memory scanning thread ended 2023/06/20 20:33:35 testing simple program... [ 28.115759] cgroup: Unknown subsys name 'net' [ 28.160495] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 20:33:35 Registers: info registers vcpu 0 RAX=00000000dead4ead RBX=ffffffff856d84a0 RCX=0000000000000000 RDX=0000000000000000 RSI=0000000000000008 RDI=ffffffff856d84a4 RBP=1ffff1100d9c13ab RSP=ffff88806ce09d50 R8 =0000000000000000 R9 =fffffbfff0ba7a6a R10=ffffffff85d3d357 R11=00000000000b6a61 R12=0000000000000287 R13=ffffea00003872c0 R14=ffffffff813782f8 R15=ffff88800e1cb000 RIP=ffffffff812e009a 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 00007f1143e8e900 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=00007ffc3c01d000 CR3=0000000009790000 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=1ffffffff0c76ff2 RBX=0000000000000001 RCX=ffffffff863b7f8e RDX=0000000000000000 RSI=dffffc0000000000 RDI=ffff888018f9f700 RBP=ffff888018f9f6f0 RSP=ffff888018f9f628 R8 =ffffffff863b7f92 R9 =ffff888018f9f6d8 R10=0000000000038001 R11=000000000008b5c1 R12=ffff888018f9f6f8 R13=ffff888018f9f6e0 R14=ffff888018f9fbe8 R15=ffff888018f9f698 RIP=ffffffff81131118 RFL=00000212 [----A--] 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 00007f1143e8e900 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=00007fd0fd10c370 CR3=0000000009790000 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=6720646572637465733a4d41503d706f XMM01=652022746f6f72223d74636361207469 XMM02=3d6c616e696d72657420322e322e302e XMM03=3d656d616e74736f682022646873732f XMM04=40404040404040404040404040404040 XMM05=5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a XMM06=20202020202020202020202020202020 XMM07=00000000000000000000000000000000 XMM08=652075253d64692073253d706f000000 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000