syzkaller login: [ 30.795965] BUG: Bad rss-counter state mm:00000000e939c54a type:MM_FILEPAGES val:33 [ 30.797195] BUG: Bad rss-counter state mm:00000000e939c54a type:MM_ANONPAGES val:22 [ 30.836682] ================================================================== [ 30.837802] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 30.839018] Read of size 8 at addr ffff88801584db38 by task sshd/220 [ 30.839952] [ 30.840219] CPU: 0 PID: 220 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 30.841298] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 30.842464] Call Trace: [ 30.842840] [ 30.843179] dump_stack_lvl+0x91/0xf0 [ 30.843763] print_report+0xcc/0x620 [ 30.844334] ? __virt_addr_valid+0x102/0x340 [ 30.845000] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.845728] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.846525] kasan_report+0xbe/0xf0 [ 30.847139] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.847945] vma_interval_tree_remove+0xc75/0xec0 [ 30.848726] vma_prepare+0xc54/0x11a0 [ 30.849375] __split_vma+0x5af/0x950 [ 30.849928] ? __pfx___split_vma+0x10/0x10 [ 30.850478] ? find_held_lock+0x2c/0x110 [ 30.851020] do_vmi_align_munmap+0x2ba/0x11f0 [ 30.851606] ? lock_is_held_type+0x9f/0x120 [ 30.852172] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 30.852807] ? mtree_range_walk+0x632/0x900 [ 30.853394] ? mas_walk+0x5c7/0x7c0 [ 30.853891] do_vmi_munmap+0x1f1/0x2b0 [ 30.854401] mmap_region+0x1f9/0x2660 [ 30.854903] ? vm_mmap_pgoff+0x15c/0x3a0 [ 30.855438] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 30.856176] ? __pfx_lock_acquire+0x10/0x10 [ 30.856729] ? __pfx_mmap_region+0x10/0x10 [ 30.857295] ? security_mmap_addr+0x7d/0xa0 [ 30.857846] ? get_unmapped_area+0x1f5/0x3f0 [ 30.858415] do_mmap+0x854/0xf00 [ 30.858874] vm_mmap_pgoff+0x1a6/0x3a0 [ 30.859386] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 30.859976] ksys_mmap_pgoff+0x3af/0x500 [ 30.860498] do_syscall_64+0x3f/0x90 [ 30.861002] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.861675] RIP: 0033:0x7f0e29ca9d82 [ 30.862149] 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 [ 30.864368] RSP: 002b:00007ffeaa443aa8 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 30.865320] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f0e29ca9d82 [ 30.866200] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f0e290e3000 [ 30.867082] RBP: 00007f0e290e3000 R08: 0000000000000009 R09: 0000000000001000 [ 30.867962] R10: 0000000000000812 R11: 0000000000000206 R12: 0000558ebb777ec0 [ 30.868839] R13: 00007ffeaa443ac0 R14: 00007ffeaa443af0 R15: 00007ffeaa443e50 [ 30.869746] [ 30.870047] [ 30.870267] Allocated by task 213: [ 30.870711] kasan_save_stack+0x22/0x50 [ 30.871239] kasan_set_track+0x25/0x30 [ 30.871751] __kasan_slab_alloc+0x59/0x70 [ 30.872297] kmem_cache_alloc+0x16b/0x370 [ 30.872836] vm_area_dup+0x20/0x160 [ 30.873318] __split_vma+0x170/0x950 [ 30.873802] split_vma+0xc6/0x110 [ 30.874259] mprotect_fixup+0x8d2/0xb30 [ 30.874783] do_mprotect_pkey+0x87e/0xd40 [ 30.875323] __x64_sys_mprotect+0x78/0xc0 [ 30.875867] do_syscall_64+0x3f/0x90 [ 30.876360] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.877037] [ 30.877261] Freed by task 213: [ 30.877668] kasan_save_stack+0x22/0x50 [ 30.878195] kasan_set_track+0x25/0x30 [ 30.878711] kasan_save_free_info+0x2b/0x50 [ 30.879271] __kasan_slab_free+0x10a/0x190 [ 30.879839] kmem_cache_free+0x10d/0x4d0 [ 30.880377] rcu_core+0x8c8/0x2860 [ 30.880837] __do_softirq+0x1b7/0x7d4 [ 30.881359] [ 30.881579] Last potentially related work creation: [ 30.882191] kasan_save_stack+0x22/0x50 [ 30.882709] __kasan_record_aux_stack+0x8e/0xa0 [ 30.883303] __call_rcu_common.constprop.0+0x6a/0xb90 [ 30.883967] remove_vma+0x139/0x170 [ 30.884434] do_vmi_align_munmap+0xd4a/0x11f0 [ 30.885021] do_vmi_munmap+0x1f1/0x2b0 [ 30.885522] __vm_munmap+0x138/0x3a0 [ 30.886003] __x64_sys_munmap+0x59/0x80 [ 30.886518] do_syscall_64+0x3f/0x90 [ 30.887004] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.887671] [ 30.887896] The buggy address belongs to the object at ffff88801584dae0 [ 30.887896] which belongs to the cache vm_area_struct of size 168 [ 30.889428] The buggy address is located 88 bytes inside of [ 30.889428] freed 168-byte region [ffff88801584dae0, ffff88801584db88) [ 30.890881] [ 30.891100] The buggy address belongs to the physical page: [ 30.891784] page:00000000bcadeb9b refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x1584d [ 30.892915] memcg:ffff88800d683d01 [ 30.893356] flags: 0x100000000000200(slab|node=0|zone=1) [ 30.894024] page_type: 0xffffffff() [ 30.894487] raw: 0100000000000200 ffff8880087a0c80 dead000000000122 0000000000000000 [ 30.895442] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800d683d01 [ 30.896390] page dumped because: kasan: bad access detected [ 30.897081] [ 30.897302] Memory state around the buggy address: [ 30.897906] ffff88801584da00: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 30.898791] ffff88801584da80: 00 00 00 00 fc fc fc fc fc fc fc fc fa fb fb fb [ 30.899675] >ffff88801584db00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 30.900555] ^ [ 30.901210] ffff88801584db80: fb fc fc fc fc fc fc fc fc fa fb fb fb fb fb fb [ 30.902093] ffff88801584dc00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fc fc [ 30.902975] ================================================================== [ 30.904294] Disabling lock debugging due to kernel taint [ 32.731640] BUG: Bad rss-counter state mm:00000000706eb589 type:MM_FILEPAGES val:33 [ 32.732477] BUG: Bad rss-counter state mm:00000000706eb589 type:MM_ANONPAGES val:22 [ 33.275793] BUG: Bad rss-counter state mm:00000000ff716fa6 type:MM_FILEPAGES val:33 [ 33.276985] BUG: Bad rss-counter state mm:00000000ff716fa6 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:13805' (ECDSA) to the list of known hosts. 2023/06/21 01:37:19 fuzzer started 2023/06/21 01:37:20 dialing manager at localhost:36067 2023/06/21 01:37:20 checking machine... 2023/06/21 01:37:20 checking revisions... [ 33.853084] kmemleak: Automatic memory scanning thread ended 2023/06/21 01:37:20 testing simple program... [ 33.906242] cgroup: Unknown subsys name 'net' [ 33.967793] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 01:37:19 Registers: info registers vcpu 0 RAX=0000000080010001 RBX=000000000000e102 RCX=0000000000000000 RDX=ffff88800ed61b40 RSI=ffffffff813c925d RDI=0000000000000005 RBP=0000000000000000 RSP=ffff88806ce09ea0 R8 =0000000000000005 R9 =0000000000000000 R10=0000000000000000 R11=0000000000000001 R12=00000007b0cd0fc0 R13=0000000000000000 R14=0000000000000000 R15=dffffc0000000000 RIP=ffffffff813c925d 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 00007f8adb1b7900 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=00007f8adb76e618 CR3=000000000ea9e000 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=6e69676f6c5f6d61702c78756e696c65 XMM02=755f6d61702c74696d7265705f6d6170 XMM03=2c766e655f6d61702c7374696d696c5f XMM04=6d61702c766e655f6d61702c7374696d XMM05=78696e755f6d61702c74696d7265705f XMM06=6469756e69676f6c5f6d61702c78756e XMM07=672065736f6c635f6e6f69737365733a XMM08=61662029286e65706f5f746964756100 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=ffff88806cf35000 RBX=0000000000000001 RCX=ffffffff8451250e RDX=ffffed100d9e6a01 RSI=0000000000000004 RDI=ffffffff81288ac5 RBP=dffffc0000000000 RSP=ffff888008e07e70 R8 =0000000000000000 R9 =ffffed100d9e6a00 R10=ffff88806cf35003 R11=ffff888008c04400 R12=ffffffff85d3d350 R13=1ffff110011c0fd3 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 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=00007fa5d6848990 CR3=000000000d638000 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=d2999ea0003e38b7ef4d8ea568585506 XMM02=2c67c8bc2e329bc3000000000011d5d8 XMM03=fb795ef6d65770560000000000121d78 XMM04=7ffef5a868d003b500000000000ae988 XMM05=19e9129bd510f2350000000000131be8 XMM06=a5e71765ee6de5500000000000130a50 XMM07=e042d86d42eb936e0000000000121ff8 XMM08=f55e95796ddd2506000000000011d638 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000