syzkaller login: [ 31.097179] BUG: Bad rss-counter state mm:000000003f0cb67e type:MM_FILEPAGES val:33 [ 31.098605] BUG: Bad rss-counter state mm:000000003f0cb67e type:MM_ANONPAGES val:22 [ 31.264975] ================================================================== [ 31.265885] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 31.266832] Read of size 8 at addr ffff88800efd1ed8 by task sshd/221 [ 31.267589] [ 31.267805] CPU: 0 PID: 221 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 31.268713] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 31.269703] Call Trace: [ 31.270017] [ 31.270303] dump_stack_lvl+0x91/0xf0 [ 31.270814] print_report+0xcc/0x620 [ 31.271291] ? __virt_addr_valid+0x102/0x340 [ 31.271835] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.272449] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.273070] kasan_report+0xbe/0xf0 [ 31.273539] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.274173] vma_interval_tree_remove+0xc75/0xec0 [ 31.274781] vma_prepare+0xc54/0x11a0 [ 31.275268] __split_vma+0x5af/0x950 [ 31.275749] ? __pfx___split_vma+0x10/0x10 [ 31.276271] ? find_held_lock+0x2c/0x110 [ 31.276792] do_vmi_align_munmap+0x2ba/0x11f0 [ 31.277347] ? lock_is_held_type+0x9f/0x120 [ 31.277876] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 31.278475] ? mtree_range_walk+0x632/0x900 [ 31.279031] ? mas_walk+0x5c7/0x7c0 [ 31.279506] do_vmi_munmap+0x1f1/0x2b0 [ 31.279999] mmap_region+0x1f9/0x2660 [ 31.280477] ? vm_mmap_pgoff+0x15c/0x3a0 [ 31.280984] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 31.281693] ? __pfx_lock_acquire+0x10/0x10 [ 31.282242] ? __pfx_mmap_region+0x10/0x10 [ 31.282794] ? security_mmap_addr+0x7d/0xa0 [ 31.283320] ? get_unmapped_area+0x1f5/0x3f0 [ 31.283869] do_mmap+0x854/0xf00 [ 31.284309] vm_mmap_pgoff+0x1a6/0x3a0 [ 31.284798] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 31.285355] ksys_mmap_pgoff+0x3af/0x500 [ 31.285861] do_syscall_64+0x3f/0x90 [ 31.286341] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.286997] RIP: 0033:0x7fe8af81ad82 [ 31.287455] 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 [ 31.289584] RSP: 002b:00007ffcceada908 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 31.290521] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007fe8af81ad82 [ 31.291366] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007fe8aec54000 [ 31.292210] RBP: 00007fe8aec54000 R08: 0000000000000009 R09: 0000000000001000 [ 31.293047] R10: 0000000000000812 R11: 0000000000000206 R12: 000055ef5f145d90 [ 31.293888] R13: 00007ffcceada920 R14: 00007ffcceada950 R15: 00007ffcceadacb0 [ 31.294734] [ 31.295050] [ 31.295273] Allocated by task 214: [ 31.295698] kasan_save_stack+0x22/0x50 [ 31.296201] kasan_set_track+0x25/0x30 [ 31.296704] __kasan_slab_alloc+0x59/0x70 [ 31.297230] kmem_cache_alloc+0x16b/0x370 [ 31.297747] vm_area_dup+0x20/0x160 [ 31.298200] __split_vma+0x170/0x950 [ 31.298664] split_vma+0xc6/0x110 [ 31.299113] mprotect_fixup+0x8d2/0xb30 [ 31.299611] do_mprotect_pkey+0x87e/0xd40 [ 31.300129] __x64_sys_mprotect+0x78/0xc0 [ 31.300647] do_syscall_64+0x3f/0x90 [ 31.301121] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.301769] [ 31.301980] Freed by task 19: [ 31.302359] kasan_save_stack+0x22/0x50 [ 31.302869] kasan_set_track+0x25/0x30 [ 31.303361] kasan_save_free_info+0x2b/0x50 [ 31.303895] __kasan_slab_free+0x10a/0x190 [ 31.304430] kmem_cache_free+0x10d/0x4d0 [ 31.304938] rcu_core+0x8c8/0x2860 [ 31.305385] __do_softirq+0x1b7/0x7d4 [ 31.305864] [ 31.306080] Last potentially related work creation: [ 31.306660] kasan_save_stack+0x22/0x50 [ 31.307177] __kasan_record_aux_stack+0x8e/0xa0 [ 31.307748] __call_rcu_common.constprop.0+0x6a/0xb90 [ 31.308388] remove_vma+0x139/0x170 [ 31.308841] do_vmi_align_munmap+0xd4a/0x11f0 [ 31.309397] do_vmi_munmap+0x1f1/0x2b0 [ 31.309892] __vm_munmap+0x138/0x3a0 [ 31.310356] __x64_sys_munmap+0x59/0x80 [ 31.310862] do_syscall_64+0x3f/0x90 [ 31.311346] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.312000] [ 31.312215] The buggy address belongs to the object at ffff88800efd1e80 [ 31.312215] which belongs to the cache vm_area_struct of size 168 [ 31.313680] The buggy address is located 88 bytes inside of [ 31.313680] freed 168-byte region [ffff88800efd1e80, ffff88800efd1f28) [ 31.315081] [ 31.315298] The buggy address belongs to the physical page: [ 31.315953] page:00000000e7916238 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xefd1 [ 31.317024] memcg:ffff88801818bc01 [ 31.317448] anon flags: 0x100000000000200(slab|node=0|zone=1) [ 31.318154] page_type: 0xffffffff() [ 31.318611] raw: 0100000000000200 ffff8880087a0c80 ffffea0000258440 dead000000000007 [ 31.319530] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88801818bc01 [ 31.320431] page dumped because: kasan: bad access detected [ 31.321090] [ 31.321306] Memory state around the buggy address: [ 31.321877] ffff88800efd1d80: fc fc fc fa fb fb fb fb fb fb fb fb fb fb fb fb [ 31.322731] ffff88800efd1e00: fb fb fb fb fb fb fb fb fc fc fc fc fc fc fc fc [ 31.323602] >ffff88800efd1e80: fa fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 31.324442] ^ [ 31.325172] ffff88800efd1f00: fb fb fb fb fb fc fc fc fc fc fc fc fc fc fc fc [ 31.326029] ffff88800efd1f80: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc [ 31.326888] ================================================================== [ 31.327849] Disabling lock debugging due to kernel taint [ 33.110005] BUG: Bad rss-counter state mm:000000006824e1a1 type:MM_FILEPAGES val:33 [ 33.110817] BUG: Bad rss-counter state mm:000000006824e1a1 type:MM_ANONPAGES val:22 [ 33.594756] BUG: Bad rss-counter state mm:00000000b9fbc685 type:MM_FILEPAGES val:33 [ 33.595942] BUG: Bad rss-counter state mm:00000000b9fbc685 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:17093' (ECDSA) to the list of known hosts. 2023/06/20 11:21:54 fuzzer started 2023/06/20 11:21:54 dialing manager at localhost:36067 2023/06/20 11:21:54 checking machine... 2023/06/20 11:21:54 checking revisions... [ 34.340334] kmemleak: Automatic memory scanning thread ended 2023/06/20 11:21:54 testing simple program... [ 34.399126] cgroup: Unknown subsys name 'net' [ 34.454982] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 11:21:53 Registers: info registers vcpu 0 RAX=ffff88806ce35000 RBX=0000000000000000 RCX=ffffffff8451250e RDX=ffffed100d9c6a01 RSI=0000000000000004 RDI=ffffffff81288ac5 RBP=dffffc0000000000 RSP=ffffffff85407e10 R8 =0000000000000000 R9 =ffffed100d9c6a00 R10=ffff88806ce35003 R11=ffff888008c04000 R12=ffffffff85d3d350 R13=1ffffffff0a80fc7 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 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=00007fe76acf2028 CR3=000000000dbb6000 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=2033353a31323a3131203032206e754a XMM01=73732878696e755f6d6170203a5d3033 XMM02=65736f6c63206e6f6973736573203a29 XMM03=755f6d6170203a5d3033325b64687373 XMM04=69662068637573206f4e203a656c6163 XMM05=3a656c696620766e65206e65706f206f XMM06=65733a6468737328766e655f6d617020 XMM07=6b7a79732033353a31323a3131203032 XMM08=69767265733d7373616c63742030733a XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=dffffc0000000000 RBX=ffffffff813ad470 RCX=ffffffff860a1401 RDX=1ffff1100d9e134a RSI=ffffffff8451105e RDI=ffff88806cf09a50 RBP=ffff88806cf09ae8 RSP=ffff88806cf09a28 R8 =ffffffff860a1444 R9 =ffff88806cf09a90 R10=0000000000038001 R11=000000000000792d R12=ffff88806cf09b18 R13=0000000000000000 R14=ffff8880169a1b40 R15=ffff88806cf09a50 RIP=ffffffff811305f0 RFL=00000212 [----A--] 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 =0000 0000000000000000 00000000 00000000 DS =0000 0000000000000000 00000000 00000000 FS =0000 00007fea290bd900 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=00007fea2945a31c CR3=000000001ce52000 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=6720646572637465733a4d41503d706f 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