[ 23.746620] BUG: Bad rss-counter state mm:0000000025cfc6d6 type:MM_FILEPAGES val:33 [ 23.748288] BUG: Bad rss-counter state mm:0000000025cfc6d6 type:MM_ANONPAGES val:22 [ 23.918374] ================================================================== [ 23.919441] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 23.920542] Read of size 8 at addr ffff88800eeba310 by task sshd/219 [ 23.921354] [ 23.921586] CPU: 0 PID: 219 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 23.922514] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 23.923561] Call Trace: [ 23.923899] [ 23.924200] dump_stack_lvl+0x91/0xf0 [ 23.924723] print_report+0xcc/0x620 [ 23.925239] ? __virt_addr_valid+0x102/0x340 [ 23.925821] ? vma_interval_tree_remove+0xc75/0xec0 [ 23.926474] ? vma_interval_tree_remove+0xc75/0xec0 [ 23.927155] kasan_report+0xbe/0xf0 [ 23.927683] ? vma_interval_tree_remove+0xc75/0xec0 [ 23.928365] vma_interval_tree_remove+0xc75/0xec0 [ 23.929026] vma_prepare+0xc54/0x11a0 [ 23.929557] __split_vma+0x5af/0x950 [ 23.930071] ? __pfx___split_vma+0x10/0x10 [ 23.930655] ? find_held_lock+0x2c/0x110 [ 23.931242] do_vmi_align_munmap+0x2ba/0x11f0 [ 23.931877] ? lock_is_held_type+0x9f/0x120 [ 23.932481] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 23.933152] ? mtree_range_walk+0x632/0x900 [ 23.933767] ? mas_walk+0x5c7/0x7c0 [ 23.934295] do_vmi_munmap+0x1f1/0x2b0 [ 23.934858] mmap_region+0x1f9/0x2660 [ 23.935413] ? vm_mmap_pgoff+0x15c/0x3a0 [ 23.936021] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 23.936874] ? __pfx_lock_acquire+0x10/0x10 [ 23.937515] ? __pfx_mmap_region+0x10/0x10 [ 23.938140] ? security_mmap_addr+0x7d/0xa0 [ 23.938780] ? get_unmapped_area+0x1f5/0x3f0 [ 23.939449] do_mmap+0x854/0xf00 [ 23.939966] vm_mmap_pgoff+0x1a6/0x3a0 [ 23.940543] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 23.941206] ksys_mmap_pgoff+0x3af/0x500 [ 23.941798] do_syscall_64+0x3f/0x90 [ 23.942353] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 23.943121] RIP: 0033:0x7f23be240d82 [ 23.943668] 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 [ 23.946185] RSP: 002b:00007fff1b78d238 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 23.947281] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f23be240d82 [ 23.948296] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f23bd67a000 [ 23.949304] RBP: 00007f23bd67a000 R08: 0000000000000009 R09: 0000000000001000 [ 23.950311] R10: 0000000000000812 R11: 0000000000000206 R12: 000055ed6f89ad90 [ 23.951340] R13: 00007fff1b78d250 R14: 00007fff1b78d280 R15: 00007fff1b78d5e0 [ 23.952362] [ 23.952702] [ 23.952956] Allocated by task 212: [ 23.953468] kasan_save_stack+0x22/0x50 [ 23.954069] kasan_set_track+0x25/0x30 [ 23.954651] __kasan_slab_alloc+0x59/0x70 [ 23.955304] kmem_cache_alloc+0x16b/0x370 [ 23.955915] vm_area_dup+0x20/0x160 [ 23.956455] __split_vma+0x170/0x950 [ 23.957016] split_vma+0xc6/0x110 [ 23.957542] mprotect_fixup+0x8d2/0xb30 [ 23.958143] do_mprotect_pkey+0x87e/0xd40 [ 23.958768] __x64_sys_mprotect+0x78/0xc0 [ 23.959380] do_syscall_64+0x3f/0x90 [ 23.959906] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 23.960612] [ 23.960844] Freed by task 212: [ 23.961265] kasan_save_stack+0x22/0x50 [ 23.961799] kasan_set_track+0x25/0x30 [ 23.962319] kasan_save_free_info+0x2b/0x50 [ 23.962896] __kasan_slab_free+0x10a/0x190 [ 23.963465] kmem_cache_free+0x10d/0x4d0 [ 23.964005] rcu_core+0x8c8/0x2860 [ 23.964470] __do_softirq+0x1b7/0x7d4 [ 23.964983] [ 23.965210] Last potentially related work creation: [ 23.965834] kasan_save_stack+0x22/0x50 [ 23.966371] __kasan_record_aux_stack+0x8e/0xa0 [ 23.967002] __call_rcu_common.constprop.0+0x6a/0xb90 [ 23.967688] remove_vma+0x139/0x170 [ 23.968170] do_vmi_align_munmap+0xd4a/0x11f0 [ 23.968765] do_vmi_munmap+0x1f1/0x2b0 [ 23.969288] __vm_munmap+0x138/0x3a0 [ 23.969793] __x64_sys_munmap+0x59/0x80 [ 23.970334] do_syscall_64+0x3f/0x90 [ 23.970855] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 23.971547] [ 23.971787] The buggy address belongs to the object at ffff88800eeba2b8 [ 23.971787] which belongs to the cache vm_area_struct of size 168 [ 23.973337] The buggy address is located 88 bytes inside of [ 23.973337] freed 168-byte region [ffff88800eeba2b8, ffff88800eeba360) [ 23.974826] [ 23.975056] The buggy address belongs to the physical page: [ 23.975757] page:0000000000445fc5 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xeeba [ 23.976896] memcg:ffff88800eccad01 [ 23.977355] anon flags: 0x100000000000200(slab|node=0|zone=1) [ 23.978096] page_type: 0xffffffff() [ 23.978576] raw: 0100000000000200 ffff8880087a0c80 0000000000000000 dead000000000001 [ 23.979597] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800eccad01 [ 23.980602] page dumped because: kasan: bad access detected [ 23.981325] [ 23.981566] Memory state around the buggy address: [ 23.982202] ffff88800eeba200: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 fc [ 23.983155] ffff88800eeba280: fc fc fc fc fc fc fc fa fb fb fb fb fb fb fb fb [ 23.984098] >ffff88800eeba300: fb fb fb fb fb fb fb fb fb fb fb fb fc fc fc fc [ 23.985045] ^ [ 23.985556] ffff88800eeba380: fc fc fc fc fa fb fb fb fb fb fb fb fb fb fb fb [ 23.986506] ffff88800eeba400: fb fb fb fb fb fb fb fb fb fc fc fc fc fc fc fc [ 23.987473] ================================================================== [ 23.988582] Disabling lock debugging due to kernel taint Debian GNU/Linux 11 syzkaller ttyS0 syzkaller login: [ 26.021614] BUG: Bad rss-counter state mm:000000005bf93011 type:MM_FILEPAGES val:33 [ 26.022671] BUG: Bad rss-counter state mm:000000005bf93011 type:MM_ANONPAGES val:22 [ 26.461919] BUG: Bad rss-counter state mm:00000000f83e606b type:MM_FILEPAGES val:33 [ 26.462922] BUG: Bad rss-counter state mm:00000000f83e606b type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:52366' (ECDSA) to the list of known hosts. 2023/06/21 06:46:32 fuzzer started 2023/06/21 06:46:33 dialing manager at localhost:36067 2023/06/21 06:46:33 checking machine... 2023/06/21 06:46:33 checking revisions... [ 27.155968] kmemleak: Automatic memory scanning thread ended 2023/06/21 06:46:33 testing simple program... [ 27.226132] cgroup: Unknown subsys name 'net' [ 27.264470] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 06:46:32 Registers: info registers vcpu 0 RAX=ffffffff84537da7 RBX=ffffffff813ad470 RCX=0000000000000001 RDX=1ffff1100d9c135e RSI=ffff88806ce09f50 RDI=ffffffff84537da7 RBP=ffff88806ce09b30 RSP=ffff88806ce09a98 R8 =0000000000000001 R9 =ffff88806ce09ad8 R10=0000000000038001 R11=000000000000fdcc R12=ffff88806ce09b60 R13=0000000000000000 R14=ffffffff8542a6c0 R15=ffff888009718980 RIP=ffffffff810bd06d 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 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=00007f72f93decc0 CR3=000000000d596000 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=fc91cbe7c5daaf94454dc64c163a6bc4 XMM02=000000000011b738ec2efd57dc4c00df XMM03=0000000000121df02a7a94d74e7bc5bb XMM04=6e7b488d29f9db9f00000000000ae988 XMM05=dfcdbad4f1609c370000000000131990 XMM06=f9b763c0e8aeb5aa0000000000130b68 XMM07=e042d86d42eb936e0000000000122070 XMM08=2a7a94d74e7bc5bb000000000011b798 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=fffff940000dc640 RBX=fffff940000dc641 RCX=ffffffff8170c40d RDX=0000000000000001 RSI=0000000000000008 RDI=ffffea00006e3200 RBP=fffff940000dc640 RSP=ffff888015eff778 R8 =0000000000000000 R9 =fffff940000dc640 R10=ffffea00006e3207 R11=0000000000000000 R12=00000000ffffffff R13=00007fa7cb2ce000 R14=ffff888019986668 R15=dffffc0000000000 RIP=ffffffff8180f0a8 RFL=00000283 [--S---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 00007fa7cb2fd900 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=00007fa7cb2dc020 CR3=000000000c574000 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=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