syzkaller login: [ 30.694319] BUG: Bad rss-counter state mm:0000000095c8ba8c type:MM_FILEPAGES val:33 [ 30.695558] BUG: Bad rss-counter state mm:0000000095c8ba8c type:MM_ANONPAGES val:22 [ 30.731640] ================================================================== [ 30.732921] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 30.734272] Read of size 8 at addr ffff88800f0cf880 by task sshd/221 [ 30.735169] [ 30.735399] CPU: 1 PID: 221 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 30.736506] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 30.737585] Call Trace: [ 30.737970] [ 30.738335] dump_stack_lvl+0x91/0xf0 [ 30.738922] print_report+0xcc/0x620 [ 30.739533] ? __virt_addr_valid+0x102/0x340 [ 30.740152] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.740893] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.741555] kasan_report+0xbe/0xf0 [ 30.742231] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.742895] vma_interval_tree_remove+0xc75/0xec0 [ 30.743569] vma_prepare+0xc54/0x11a0 [ 30.744079] __split_vma+0x5af/0x950 [ 30.744583] ? __pfx___split_vma+0x10/0x10 [ 30.745148] ? find_held_lock+0x2c/0x110 [ 30.745704] do_vmi_align_munmap+0x2ba/0x11f0 [ 30.746303] ? lock_is_held_type+0x9f/0x120 [ 30.746873] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 30.747527] ? mtree_range_walk+0x632/0x900 [ 30.748116] ? mas_walk+0x5c7/0x7c0 [ 30.748620] do_vmi_munmap+0x1f1/0x2b0 [ 30.749142] mmap_region+0x1f9/0x2660 [ 30.749657] ? vm_mmap_pgoff+0x15c/0x3a0 [ 30.750203] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 30.750955] ? __pfx_lock_acquire+0x10/0x10 [ 30.751531] ? __pfx_mmap_region+0x10/0x10 [ 30.752093] ? security_mmap_addr+0x7d/0xa0 [ 30.752659] ? get_unmapped_area+0x1f5/0x3f0 [ 30.753241] do_mmap+0x854/0xf00 [ 30.753707] vm_mmap_pgoff+0x1a6/0x3a0 [ 30.754237] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 30.754836] ksys_mmap_pgoff+0x3af/0x500 [ 30.755375] do_syscall_64+0x3f/0x90 [ 30.755911] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.756602] RIP: 0033:0x7f94693edd82 [ 30.757094] 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 [ 30.759376] RSP: 002b:00007ffdd0259348 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 30.760343] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f94693edd82 [ 30.761238] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f9468827000 [ 30.762136] RBP: 00007f9468827000 R08: 0000000000000009 R09: 0000000000001000 [ 30.763041] R10: 0000000000000812 R11: 0000000000000206 R12: 00005652adb99ec0 [ 30.763952] R13: 00007ffdd0259360 R14: 00007ffdd0259390 R15: 00007ffdd02596f0 [ 30.764860] [ 30.765169] [ 30.765398] Allocated by task 214: [ 30.765855] kasan_save_stack+0x22/0x50 [ 30.766390] kasan_set_track+0x25/0x30 [ 30.766911] __kasan_slab_alloc+0x59/0x70 [ 30.767480] kmem_cache_alloc+0x16b/0x370 [ 30.768032] vm_area_dup+0x20/0x160 [ 30.768521] __split_vma+0x170/0x950 [ 30.769017] split_vma+0xc6/0x110 [ 30.769486] mprotect_fixup+0x8d2/0xb30 [ 30.770025] do_mprotect_pkey+0x87e/0xd40 [ 30.770575] __x64_sys_mprotect+0x78/0xc0 [ 30.771129] do_syscall_64+0x3f/0x90 [ 30.771662] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.772348] [ 30.772577] Freed by task 214: [ 30.772997] kasan_save_stack+0x22/0x50 [ 30.773537] kasan_set_track+0x25/0x30 [ 30.774067] kasan_save_free_info+0x2b/0x50 [ 30.774635] __kasan_slab_free+0x10a/0x190 [ 30.775271] kmem_cache_free+0x10d/0x4d0 [ 30.775819] rcu_core+0x8c8/0x2860 [ 30.776292] __do_softirq+0x1b7/0x7d4 [ 30.776802] [ 30.777032] Last potentially related work creation: [ 30.777655] kasan_save_stack+0x22/0x50 [ 30.778190] __kasan_record_aux_stack+0x8e/0xa0 [ 30.778802] __call_rcu_common.constprop.0+0x6a/0xb90 [ 30.779504] remove_vma+0x139/0x170 [ 30.779987] do_vmi_align_munmap+0xd4a/0x11f0 [ 30.780583] do_vmi_munmap+0x1f1/0x2b0 [ 30.781096] __vm_munmap+0x138/0x3a0 [ 30.781593] __x64_sys_munmap+0x59/0x80 [ 30.782121] do_syscall_64+0x3f/0x90 [ 30.782629] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.783315] [ 30.783556] The buggy address belongs to the object at ffff88800f0cf828 [ 30.783556] which belongs to the cache vm_area_struct of size 168 [ 30.785109] The buggy address is located 88 bytes inside of [ 30.785109] freed 168-byte region [ffff88800f0cf828, ffff88800f0cf8d0) [ 30.786596] [ 30.786823] The buggy address belongs to the physical page: [ 30.787550] page:000000005049a0b3 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xf0cf [ 30.788704] memcg:ffff88800ebc8201 [ 30.789154] flags: 0x100000000000200(slab|node=0|zone=1) [ 30.789840] page_type: 0xffffffff() [ 30.790323] raw: 0100000000000200 ffff8880087a0c80 ffffea00003c8540 dead000000000008 [ 30.791304] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800ebc8201 [ 30.792286] page dumped because: kasan: bad access detected [ 30.792986] [ 30.793216] Memory state around the buggy address: [ 30.793836] ffff88800f0cf780: fb fb fb fb fb fb fb fb fb fb fb fb fb fc fc fc [ 30.794747] ffff88800f0cf800: fc fc fc fc fc fa fb fb fb fb fb fb fb fb fb fb [ 30.795671] >ffff88800f0cf880: fb fb fb fb fb fb fb fb fb fb fc fc fc fc fc fc [ 30.796574] ^ [ 30.797013] ffff88800f0cf900: fc fc 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 30.797912] ffff88800f0cf980: 00 00 00 00 00 00 00 fc fc fc fc fc fc fc fc 00 [ 30.798819] ================================================================== [ 30.799991] Disabling lock debugging due to kernel taint [ 32.700521] BUG: Bad rss-counter state mm:0000000044dbed51 type:MM_FILEPAGES val:33 [ 32.701377] BUG: Bad rss-counter state mm:0000000044dbed51 type:MM_ANONPAGES val:22 [ 33.171776] BUG: Bad rss-counter state mm:00000000601cc8f9 type:MM_FILEPAGES val:33 [ 33.172790] BUG: Bad rss-counter state mm:00000000601cc8f9 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:18707' (ECDSA) to the list of known hosts. 2023/06/21 00:21:35 fuzzer started 2023/06/21 00:21:35 dialing manager at localhost:36067 2023/06/21 00:21:35 checking machine... 2023/06/21 00:21:35 checking revisions... [ 33.885372] kmemleak: Automatic memory scanning thread ended 2023/06/21 00:21:35 testing simple program... [ 33.933109] cgroup: Unknown subsys name 'net' [ 33.986323] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 00:21:35 Registers: info registers vcpu 0 RAX=0000000000000000 RBX=ffff888008d92450 RCX=ffffffff812e0135 RDX=0000000000000001 RSI=0000000000000004 RDI=ffff88806ce09cd0 RBP=1ffff1100d9c1396 RSP=ffff88806ce09ca8 R8 =0000000000000001 R9 =ffffed100d9c139a R10=0000000000000003 R11=1ffff1100d9c7479 R12=ffff888008d92458 R13=ffff888008d92460 R14=0000000000000003 R15=dffffc0000000000 RIP=ffffffff812e0146 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 00007f3b4e705900 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=00007f3b4ecba650 CR3=000000000e3f0000 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=ffffffff00ffffffffffffffffffffff XMM01=707465675f6c697475646f6d6d61705f XMM02=ff000000000000ff0000000000ff0000 XMM03=66207463656e6e6f6373696420646576 XMM04=00000000000000000000000000000000 XMM05=00000000000000000000000000000000 XMM06=0d0c0f0e09080b0a0504070601000302 XMM07=00000000000000000000000000000000 XMM08=000a0d732a2e25006c61746166003367 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=00007ffd66f94fe8 CR3=0000000005482000 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=00007fa3104a0510000055ba91725790 XMM02=6f6974707972636e6561737268746977 XMM03=00000000000000000000000000777074 XMM04=40404040404040404040404040404040 XMM05=5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a XMM06=20202020202020202020202020202020 XMM07=ffffffffffff00ffffff00ffffff00ff XMM08=00002000000000202020002020200000 XMM09=ffffffffffff00ffffff00ffffff00ff XMM10=00002000000000202020002020200000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000