syzkaller login: [ 36.185131] BUG: Bad rss-counter state mm:000000004b1f0312 type:MM_FILEPAGES val:33 [ 36.186745] BUG: Bad rss-counter state mm:000000004b1f0312 type:MM_ANONPAGES val:22 [ 36.362091] ================================================================== [ 36.363026] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 36.364028] Read of size 8 at addr ffff88800f196d08 by task sshd/220 [ 36.364821] [ 36.365054] CPU: 0 PID: 220 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 36.365963] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 36.366954] Call Trace: [ 36.367278] [ 36.367583] dump_stack_lvl+0x91/0xf0 [ 36.368084] print_report+0xcc/0x620 [ 36.368585] ? __virt_addr_valid+0x102/0x340 [ 36.369195] ? vma_interval_tree_remove+0xc75/0xec0 [ 36.369836] ? vma_interval_tree_remove+0xc75/0xec0 [ 36.370479] kasan_report+0xbe/0xf0 [ 36.370969] ? vma_interval_tree_remove+0xc75/0xec0 [ 36.371599] vma_interval_tree_remove+0xc75/0xec0 [ 36.372205] vma_prepare+0xc54/0x11a0 [ 36.372687] __split_vma+0x5af/0x950 [ 36.373186] ? __pfx___split_vma+0x10/0x10 [ 36.373718] ? find_held_lock+0x2c/0x110 [ 36.374254] do_vmi_align_munmap+0x2ba/0x11f0 [ 36.374818] ? lock_is_held_type+0x9f/0x120 [ 36.375361] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 36.375974] ? mtree_range_walk+0x632/0x900 [ 36.376535] ? mas_walk+0x5c7/0x7c0 [ 36.377038] do_vmi_munmap+0x1f1/0x2b0 [ 36.377538] mmap_region+0x1f9/0x2660 [ 36.378025] ? vm_mmap_pgoff+0x15c/0x3a0 [ 36.378537] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 36.379261] ? __pfx_lock_acquire+0x10/0x10 [ 36.379804] ? __pfx_mmap_region+0x10/0x10 [ 36.380332] ? security_mmap_addr+0x7d/0xa0 [ 36.380871] ? get_unmapped_area+0x1f5/0x3f0 [ 36.381433] do_mmap+0x854/0xf00 [ 36.381884] vm_mmap_pgoff+0x1a6/0x3a0 [ 36.382395] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 36.382970] ksys_mmap_pgoff+0x3af/0x500 [ 36.383489] do_syscall_64+0x3f/0x90 [ 36.383978] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 36.384627] RIP: 0033:0x7f3b0afb4d82 [ 36.385102] 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 [ 36.387251] RSP: 002b:00007ffe21b7f9c8 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 36.388167] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f3b0afb4d82 [ 36.389052] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f3b0a3ee000 [ 36.389925] RBP: 00007f3b0a3ee000 R08: 0000000000000009 R09: 0000000000001000 [ 36.390789] R10: 0000000000000812 R11: 0000000000000206 R12: 000055c260514ec0 [ 36.391660] R13: 00007ffe21b7f9e0 R14: 00007ffe21b7fa10 R15: 00007ffe21b7fd70 [ 36.392546] [ 36.392843] [ 36.393070] Allocated by task 213: [ 36.393517] kasan_save_stack+0x22/0x50 [ 36.394032] kasan_set_track+0x25/0x30 [ 36.394544] __kasan_slab_alloc+0x59/0x70 [ 36.395083] kmem_cache_alloc+0x16b/0x370 [ 36.395622] vm_area_dup+0x20/0x160 [ 36.396090] __split_vma+0x170/0x950 [ 36.396566] split_vma+0xc6/0x110 [ 36.397038] mprotect_fixup+0x8d2/0xb30 [ 36.397559] do_mprotect_pkey+0x87e/0xd40 [ 36.398094] __x64_sys_mprotect+0x78/0xc0 [ 36.398631] do_syscall_64+0x3f/0x90 [ 36.399120] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 36.399787] [ 36.400002] Freed by task 213: [ 36.400404] kasan_save_stack+0x22/0x50 [ 36.400938] kasan_set_track+0x25/0x30 [ 36.401443] kasan_save_free_info+0x2b/0x50 [ 36.401989] __kasan_slab_free+0x10a/0x190 [ 36.402535] kmem_cache_free+0x10d/0x4d0 [ 36.403064] rcu_core+0x8c8/0x2860 [ 36.403524] __do_softirq+0x1b7/0x7d4 [ 36.404005] [ 36.404226] Last potentially related work creation: [ 36.404819] kasan_save_stack+0x22/0x50 [ 36.405347] __kasan_record_aux_stack+0x8e/0xa0 [ 36.405934] __call_rcu_common.constprop.0+0x6a/0xb90 [ 36.406593] remove_vma+0x139/0x170 [ 36.407069] do_vmi_align_munmap+0xd4a/0x11f0 [ 36.407634] do_vmi_munmap+0x1f1/0x2b0 [ 36.408135] __vm_munmap+0x138/0x3a0 [ 36.408616] __x64_sys_munmap+0x59/0x80 [ 36.409137] do_syscall_64+0x3f/0x90 [ 36.409615] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 36.410289] [ 36.410513] Second to last potentially related work creation: [ 36.411221] kasan_save_stack+0x22/0x50 [ 36.411747] __kasan_record_aux_stack+0x8e/0xa0 [ 36.412338] __call_rcu_common.constprop.0+0x6a/0xb90 [ 36.413004] remove_vma+0x139/0x170 [ 36.413467] do_vmi_align_munmap+0xd4a/0x11f0 [ 36.414031] do_vmi_munmap+0x1f1/0x2b0 [ 36.414526] mmap_region+0x1f9/0x2660 [ 36.415007] do_mmap+0x854/0xf00 [ 36.415452] vm_mmap_pgoff+0x1a6/0x3a0 [ 36.415955] ksys_mmap_pgoff+0x3af/0x500 [ 36.416476] do_syscall_64+0x3f/0x90 [ 36.416970] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 36.417638] [ 36.417854] The buggy address belongs to the object at ffff88800f196cb0 [ 36.417854] which belongs to the cache vm_area_struct of size 168 [ 36.419345] The buggy address is located 88 bytes inside of [ 36.419345] freed 168-byte region [ffff88800f196cb0, ffff88800f196d58) [ 36.420793] [ 36.421020] The buggy address belongs to the physical page: [ 36.421707] page:0000000003ad0c82 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xf196 [ 36.422818] memcg:ffff88800eac6201 [ 36.423250] anon flags: 0x100000000000200(slab|node=0|zone=1) [ 36.423976] page_type: 0xffffffff() [ 36.424453] raw: 0100000000000200 ffff88800879fc80 ffffea00003853c0 dead000000000005 [ 36.425422] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800eac6201 [ 36.426372] page dumped because: kasan: bad access detected [ 36.427075] [ 36.427299] Memory state around the buggy address: [ 36.427906] ffff88800f196c00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fc fc [ 36.428793] ffff88800f196c80: fc fc fc fc fc fc fa fb fb fb fb fb fb fb fb fb [ 36.429704] >ffff88800f196d00: fb fb fb fb fb fb fb fb fb fb fb fc fc fc fc fc [ 36.430580] ^ [ 36.431028] ffff88800f196d80: fc fc fc 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 36.431911] ffff88800f196e00: 00 00 00 00 00 00 00 00 fc fc fc fc fc fc fc fc [ 36.432777] ================================================================== [ 36.433822] Disabling lock debugging due to kernel taint [ 38.377506] BUG: Bad rss-counter state mm:00000000f51cf8cb type:MM_FILEPAGES val:33 [ 38.378553] BUG: Bad rss-counter state mm:00000000f51cf8cb type:MM_ANONPAGES val:22 [ 38.821997] BUG: Bad rss-counter state mm:000000008ba6d69f type:MM_FILEPAGES val:33 [ 38.822778] BUG: Bad rss-counter state mm:000000008ba6d69f type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:18493' (ECDSA) to the list of known hosts. 2023/06/20 10:44:15 fuzzer started 2023/06/20 10:44:15 dialing manager at localhost:44161 2023/06/20 10:44:15 checking machine... 2023/06/20 10:44:15 checking revisions... [ 39.404241] kmemleak: Automatic memory scanning thread ended 2023/06/20 10:44:15 testing simple program... [ 39.454168] cgroup: Unknown subsys name 'net' [ 39.498275] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 10:44:07 Registers: info registers vcpu 0 RAX=ffff88800ec854c0 RBX=0000000000000000 RCX=00000000800d000d RDX=00000000800d000b RSI=ffffffff81806c6b RDI=0000000000000000 RBP=ffff88800c5b77e0 RSP=ffff88800c5b7720 R8 =00000000800d000d R9 =fffffbfff0ba77da R10=ffffffff85d3bed7 R11=ffffffff81806df1 R12=ffff88800844f780 R13=ffff88800ec85980 R14=ffffea00003b2140 R15=ffff88806ce3de00 RIP=ffffffff818072a6 RFL=00000082 [--S----] 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 00007f8c3dd29700 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=00007fd5eaaa4000 CR3=000000000d9c2000 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=2035313a34343a3031203032206e754a XMM01=73732878696e755f6d6170203a5d3932 XMM02=65736f6c63206e6f6973736573203a29 XMM03=755f6d6170203a5d3932325b64687373 XMM04=69662068637573206f4e203a656c6163 XMM05=3a656c696620766e65206e65706f206f XMM06=65733a6468737328766e655f6d617020 XMM07=6b7a79732034313a34343a3031203032 XMM08=3d656e696c646d632022656369767265 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=dffffc0000000000 RBX=0000000000000001 RCX=ffffffff846000a9 RDX=0000000000036000 RSI=0000000000036000 RDI=ffffffff865bfbc0 RBP=ffff888016d074e8 RSP=ffff888016d07420 R8 =0000000000000000 R9 =ffff888016d074d0 R10=0000000000038001 R11=00000000000b4fb9 R12=ffff888016d074f0 R13=ffff888016d074d8 R14=ffff888016d074d1 R15=ffff888016d07490 RIP=ffffffff8113077a RFL=00000216 [----AP-] 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 00007f9f12f69900 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=00007ffede4c8000 CR3=000000001ce66000 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=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