syzkaller login: [ 39.130824] BUG: Bad rss-counter state mm:00000000b65efa74 type:MM_FILEPAGES val:33 [ 39.131872] BUG: Bad rss-counter state mm:00000000b65efa74 type:MM_ANONPAGES val:22 [ 39.293786] ================================================================== [ 39.294739] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 39.295726] Read of size 8 at addr ffff88800e755c20 by task sshd/219 [ 39.296530] [ 39.296845] CPU: 0 PID: 219 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 39.297751] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 39.298766] Call Trace: [ 39.299124] [ 39.299418] dump_stack_lvl+0x91/0xf0 [ 39.299922] print_report+0xcc/0x620 [ 39.300419] ? __virt_addr_valid+0x102/0x340 [ 39.301011] ? vma_interval_tree_remove+0xc75/0xec0 [ 39.301658] ? vma_interval_tree_remove+0xc75/0xec0 [ 39.302313] kasan_report+0xbe/0xf0 [ 39.302816] ? vma_interval_tree_remove+0xc75/0xec0 [ 39.303470] vma_interval_tree_remove+0xc75/0xec0 [ 39.304105] vma_prepare+0xc54/0x11a0 [ 39.304611] __split_vma+0x5af/0x950 [ 39.305128] ? __pfx___split_vma+0x10/0x10 [ 39.305683] ? find_held_lock+0x2c/0x110 [ 39.306225] do_vmi_align_munmap+0x2ba/0x11f0 [ 39.306815] ? lock_is_held_type+0x9f/0x120 [ 39.307383] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 39.308025] ? mtree_range_walk+0x632/0x900 [ 39.308601] ? mas_walk+0x5c7/0x7c0 [ 39.309118] do_vmi_munmap+0x1f1/0x2b0 [ 39.309631] mmap_region+0x1f9/0x2660 [ 39.310131] ? vm_mmap_pgoff+0x15c/0x3a0 [ 39.310666] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 39.311410] ? __pfx_lock_acquire+0x10/0x10 [ 39.311966] ? __pfx_mmap_region+0x10/0x10 [ 39.312521] ? security_mmap_addr+0x7d/0xa0 [ 39.313086] ? get_unmapped_area+0x1f5/0x3f0 [ 39.313661] do_mmap+0x854/0xf00 [ 39.314115] vm_mmap_pgoff+0x1a6/0x3a0 [ 39.314624] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 39.315211] ksys_mmap_pgoff+0x3af/0x500 [ 39.315746] do_syscall_64+0x3f/0x90 [ 39.316245] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 39.316928] RIP: 0033:0x7fa804b91d82 [ 39.317414] 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 [ 39.319658] RSP: 002b:00007ffc31e8c038 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 39.320606] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007fa804b91d82 [ 39.321503] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007fa803fcb000 [ 39.322392] RBP: 00007fa803fcb000 R08: 0000000000000009 R09: 0000000000001000 [ 39.323280] R10: 0000000000000812 R11: 0000000000000206 R12: 00005565106cfb20 [ 39.324185] R13: 00007ffc31e8c050 R14: 00007ffc31e8c080 R15: 00007ffc31e8c3e0 [ 39.325132] [ 39.325442] [ 39.325664] Allocated by task 212: [ 39.326116] kasan_save_stack+0x22/0x50 [ 39.326650] kasan_set_track+0x25/0x30 [ 39.327174] __kasan_slab_alloc+0x59/0x70 [ 39.327728] kmem_cache_alloc+0x16b/0x370 [ 39.328261] vm_area_dup+0x20/0x160 [ 39.328747] __split_vma+0x170/0x950 [ 39.329249] split_vma+0xc6/0x110 [ 39.329704] mprotect_fixup+0x8d2/0xb30 [ 39.330228] do_mprotect_pkey+0x87e/0xd40 [ 39.330772] __x64_sys_mprotect+0x78/0xc0 [ 39.331319] do_syscall_64+0x3f/0x90 [ 39.331814] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 39.332496] [ 39.332725] Freed by task 203: [ 39.333156] kasan_save_stack+0x22/0x50 [ 39.333687] kasan_set_track+0x25/0x30 [ 39.334214] kasan_save_free_info+0x2b/0x50 [ 39.334780] __kasan_slab_free+0x10a/0x190 [ 39.335339] kmem_cache_free+0x10d/0x4d0 [ 39.335868] rcu_core+0x8c8/0x2860 [ 39.336337] __do_softirq+0x1b7/0x7d4 [ 39.336858] [ 39.337096] Last potentially related work creation: [ 39.337714] kasan_save_stack+0x22/0x50 [ 39.338254] __kasan_record_aux_stack+0x8e/0xa0 [ 39.338862] __call_rcu_common.constprop.0+0x6a/0xb90 [ 39.339557] remove_vma+0x139/0x170 [ 39.340043] do_vmi_align_munmap+0xd4a/0x11f0 [ 39.340635] do_vmi_munmap+0x1f1/0x2b0 [ 39.341163] __vm_munmap+0x138/0x3a0 [ 39.341671] __x64_sys_munmap+0x59/0x80 [ 39.342199] do_syscall_64+0x3f/0x90 [ 39.342709] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 39.343399] [ 39.343630] The buggy address belongs to the object at ffff88800e755bc8 [ 39.343630] which belongs to the cache vm_area_struct of size 168 [ 39.345224] The buggy address is located 88 bytes inside of [ 39.345224] freed 168-byte region [ffff88800e755bc8, ffff88800e755c70) [ 39.346728] [ 39.346960] The buggy address belongs to the physical page: [ 39.347656] page:00000000f00cc566 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xe755 [ 39.348817] memcg:ffff888018c49b01 [ 39.349265] anon flags: 0x100000000000200(slab|node=0|zone=1) [ 39.350007] page_type: 0xffffffff() [ 39.350481] raw: 0100000000000200 ffff88800879fc80 0000000000000000 dead000000000001 [ 39.351452] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff888018c49b01 [ 39.352417] page dumped because: kasan: bad access detected [ 39.353109] [ 39.353327] Memory state around the buggy address: [ 39.353922] ffff88800e755b00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 39.354797] ffff88800e755b80: fb fc fc fc fc fc fc fc fc fa fb fb fb fb fb fb [ 39.355662] >ffff88800e755c00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fc fc [ 39.356521] ^ [ 39.357057] ffff88800e755c80: fc fc fc fc fc fc 00 00 00 00 00 00 00 00 00 00 [ 39.357927] ffff88800e755d00: 00 00 00 00 00 00 00 00 00 00 00 fc fc fc fc fc [ 39.358791] ================================================================== [ 39.359894] Disabling lock debugging due to kernel taint [ 41.183846] BUG: Bad rss-counter state mm:000000009373e2f2 type:MM_FILEPAGES val:33 [ 41.185015] BUG: Bad rss-counter state mm:000000009373e2f2 type:MM_ANONPAGES val:22 [ 41.634566] BUG: Bad rss-counter state mm:00000000d58e4931 type:MM_FILEPAGES val:33 [ 41.635710] BUG: Bad rss-counter state mm:00000000d58e4931 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:6951' (ECDSA) to the list of known hosts. 2023/06/19 13:37:30 fuzzer started 2023/06/19 13:37:31 dialing manager at localhost:44161 2023/06/19 13:37:31 checking machine... 2023/06/19 13:37:31 checking revisions... [ 42.272898] kmemleak: Automatic memory scanning thread ended 2023/06/19 13:37:31 testing simple program... [ 42.316044] cgroup: Unknown subsys name 'net' [ 42.354819] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 13:37:30 Registers: info registers vcpu 0 RAX=0000000000000000 RBX=ffff88800e20ef00 RCX=0000000000000000 RDX=1ffff11001c41dea RSI=ffffffff81851f7d RDI=ffff88801b00ac70 RBP=ffff88801b00aa50 RSP=ffff88801ca47a88 R8 =0000000000000005 R9 =0000000000000000 R10=0000000000000000 R11=0000000000000001 R12=0000000000000000 R13=ffff88800e20f080 R14=000000000000801d R15=ffff88800e20f090 RIP=ffffffff814c07e0 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 00007f5dd8333900 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=00007f5dd88e8650 CR3=000000001c908000 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=ffffffff85d3bed0 RBX=0000000000000001 RCX=ffffffff8153425b RDX=0000000000000000 RSI=0000000000000008 RDI=ffffffff85d3bed0 RBP=ffffffff8452fffc RSP=ffff888008e57c88 R8 =0000000000000000 R9 =fffffbfff0adb044 R10=ffffffff856d8223 R11=0000000000000128 R12=0000000000000283 R13=ffff88800f0b4768 R14=ffffffff8186b9c5 R15=ffff88800d3fa280 RIP=ffffffff8180eeb2 RFL=00000002 [-------] 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 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=00007ffa2605b6d0 CR3=000000000f978000 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=2030333a37333a3331203931206e754a XMM01=657463656e6e6f63736944203a5d3832 XMM02=302e303120746f6f722072657375206d XMM03=203a5d3832325b646873732072656c6c XMM04=69662068637573206f4e203a656c6163 XMM05=3a656c696620766e65206e65706f206f XMM06=65733a6468737328766e655f6d617020 XMM07=6b7a79732030333a37333a3331203931 XMM08=00000000000000000000005100000080 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000