syzkaller login: [ 37.343919] BUG: Bad rss-counter state mm:000000004aa10f34 type:MM_FILEPAGES val:33 [ 37.344913] BUG: Bad rss-counter state mm:000000004aa10f34 type:MM_ANONPAGES val:22 [ 37.508653] ================================================================== [ 37.509596] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 37.510546] Read of size 8 at addr ffff88801a280d08 by task sshd/221 [ 37.511317] [ 37.511541] CPU: 0 PID: 221 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 37.512551] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 37.513559] Call Trace: [ 37.513882] [ 37.514191] dump_stack_lvl+0x91/0xf0 [ 37.514689] print_report+0xcc/0x620 [ 37.515188] ? __virt_addr_valid+0x102/0x340 [ 37.515770] ? vma_interval_tree_remove+0xc75/0xec0 [ 37.516412] ? vma_interval_tree_remove+0xc75/0xec0 [ 37.517056] kasan_report+0xbe/0xf0 [ 37.517543] ? vma_interval_tree_remove+0xc75/0xec0 [ 37.518179] vma_interval_tree_remove+0xc75/0xec0 [ 37.518779] vma_prepare+0xc54/0x11a0 [ 37.519257] __split_vma+0x5af/0x950 [ 37.519737] ? __pfx___split_vma+0x10/0x10 [ 37.520274] ? find_held_lock+0x2c/0x110 [ 37.520802] do_vmi_align_munmap+0x2ba/0x11f0 [ 37.521372] ? lock_is_held_type+0x9f/0x120 [ 37.521911] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 37.522515] ? mtree_range_walk+0x632/0x900 [ 37.523068] ? mas_walk+0x5c7/0x7c0 [ 37.523542] do_vmi_munmap+0x1f1/0x2b0 [ 37.524047] mmap_region+0x1f9/0x2660 [ 37.524528] ? vm_mmap_pgoff+0x15c/0x3a0 [ 37.525051] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 37.525768] ? __pfx_lock_acquire+0x10/0x10 [ 37.526307] ? __pfx_mmap_region+0x10/0x10 [ 37.526845] ? security_mmap_addr+0x7d/0xa0 [ 37.527385] ? get_unmapped_area+0x1f5/0x3f0 [ 37.527967] do_mmap+0x854/0xf00 [ 37.528415] vm_mmap_pgoff+0x1a6/0x3a0 [ 37.528914] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 37.529484] ksys_mmap_pgoff+0x3af/0x500 [ 37.529996] do_syscall_64+0x3f/0x90 [ 37.530485] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 37.531147] RIP: 0033:0x7fed440d4d82 [ 37.531605] 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 [ 37.533808] RSP: 002b:00007ffd7af07568 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 37.534744] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007fed440d4d82 [ 37.535596] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007fed4350e000 [ 37.536461] RBP: 00007fed4350e000 R08: 0000000000000009 R09: 0000000000001000 [ 37.537307] R10: 0000000000000812 R11: 0000000000000206 R12: 000055a8a7a3c980 [ 37.538149] R13: 00007ffd7af07580 R14: 00007ffd7af075b0 R15: 00007ffd7af07910 [ 37.538999] [ 37.539291] [ 37.539505] Allocated by task 214: [ 37.539944] kasan_save_stack+0x22/0x50 [ 37.540451] kasan_set_track+0x25/0x30 [ 37.540942] __kasan_slab_alloc+0x59/0x70 [ 37.541481] kmem_cache_alloc+0x16b/0x370 [ 37.541994] vm_area_dup+0x20/0x160 [ 37.542446] __split_vma+0x170/0x950 [ 37.542913] split_vma+0xc6/0x110 [ 37.543350] mprotect_fixup+0x8d2/0xb30 [ 37.543871] do_mprotect_pkey+0x87e/0xd40 [ 37.544395] __x64_sys_mprotect+0x78/0xc0 [ 37.544915] do_syscall_64+0x3f/0x90 [ 37.545387] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 37.546024] [ 37.546239] Freed by task 203: [ 37.546631] kasan_save_stack+0x22/0x50 [ 37.547151] kasan_set_track+0x25/0x30 [ 37.547643] kasan_save_free_info+0x2b/0x50 [ 37.548207] __kasan_slab_free+0x10a/0x190 [ 37.548738] kmem_cache_free+0x10d/0x4d0 [ 37.549245] rcu_core+0x8c8/0x2860 [ 37.549695] __do_softirq+0x1b7/0x7d4 [ 37.550177] [ 37.550394] Last potentially related work creation: [ 37.550983] kasan_save_stack+0x22/0x50 [ 37.551495] __kasan_record_aux_stack+0x8e/0xa0 [ 37.552086] __call_rcu_common.constprop.0+0x6a/0xb90 [ 37.552729] remove_vma+0x139/0x170 [ 37.553187] do_vmi_align_munmap+0xd4a/0x11f0 [ 37.553752] do_vmi_munmap+0x1f1/0x2b0 [ 37.554250] __vm_munmap+0x138/0x3a0 [ 37.554715] __x64_sys_munmap+0x59/0x80 [ 37.555212] do_syscall_64+0x3f/0x90 [ 37.555696] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 37.556366] [ 37.556580] The buggy address belongs to the object at ffff88801a280cb0 [ 37.556580] which belongs to the cache vm_area_struct of size 168 [ 37.558048] The buggy address is located 88 bytes inside of [ 37.558048] freed 168-byte region [ffff88801a280cb0, ffff88801a280d58) [ 37.559453] [ 37.559671] The buggy address belongs to the physical page: [ 37.560342] page:00000000c0f69c25 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x1a280 [ 37.561423] memcg:ffff88800fa60101 [ 37.561854] flags: 0x100000000000200(slab|node=0|zone=1) [ 37.562499] page_type: 0xffffffff() [ 37.562955] raw: 0100000000000200 ffff88800879fc80 dead000000000122 0000000000000000 [ 37.563885] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800fa60101 [ 37.564791] page dumped because: kasan: bad access detected [ 37.565445] [ 37.565662] Memory state around the buggy address: [ 37.566244] ffff88801a280c00: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 fc fc [ 37.567096] ffff88801a280c80: fc fc fc fc fc fc fa fb fb fb fb fb fb fb fb fb [ 37.567957] >ffff88801a280d00: fb fb fb fb fb fb fb fb fb fb fb fc fc fc fc fc [ 37.568817] ^ [ 37.569257] ffff88801a280d80: fc fc fc fa fb fb fb fb fb fb fb fb fb fb fb fb [ 37.570115] ffff88801a280e00: fb fb fb fb fb fb fb fb fc fc fc fc fc fc fc fc [ 37.570970] ================================================================== [ 37.572036] Disabling lock debugging due to kernel taint [ 39.947041] BUG: Bad rss-counter state mm:00000000024bd900 type:MM_FILEPAGES val:33 [ 39.948218] BUG: Bad rss-counter state mm:00000000024bd900 type:MM_ANONPAGES val:22 [ 40.432285] BUG: Bad rss-counter state mm:0000000025d84182 type:MM_FILEPAGES val:33 [ 40.433458] BUG: Bad rss-counter state mm:0000000025d84182 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:40798' (ECDSA) to the list of known hosts. 2023/06/19 16:46:52 fuzzer started 2023/06/19 16:46:53 dialing manager at localhost:44161 2023/06/19 16:46:53 checking machine... 2023/06/19 16:46:53 checking revisions... [ 41.180546] kmemleak: Automatic memory scanning thread ended 2023/06/19 16:46:53 testing simple program... [ 41.233521] cgroup: Unknown subsys name 'net' [ 41.292602] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 16:46:46 Registers: info registers vcpu 0 RAX=ffff88806ce35000 RBX=0000000000000000 RCX=ffffffff8450c50e RDX=ffffed100d9c6a01 RSI=0000000000000004 RDI=ffffffff812889a5 RBP=dffffc0000000000 RSP=ffffffff85407e10 R8 =0000000000000000 R9 =ffffed100d9c6a00 R10=ffff88806ce35003 R11=ffff888008c58000 R12=ffffffff85d3bed0 R13=1ffffffff0a80fc7 R14=0000000000000000 R15=0000000000000000 RIP=ffffffff8450d49f 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=00007f96ae6ce230 CR3=00000000169b8000 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=2032353a36343a3631203931206e754a XMM01=73732878696e755f6d6170203a5d3033 XMM02=65736f6c63206e6f6973736573203a29 XMM03=755f6d6170203a5d3033325b64687373 XMM04=69662068637573206f4e203a656c6163 XMM05=3a656c696620766e65206e65706f206f XMM06=65733a6468737328766e655f6d617020 XMM07=6b7a79732032353a36343a3631203931 XMM08=3d656e696c646d632022656369767265 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=ffffffff8363dca7 RBX=ffff8880166f79a8 RCX=0000000000000001 RDX=1ffff11002cdef40 RSI=ffff8880166f7e50 RDI=ffffffff8363dca7 RBP=ffff8880166f7a00 RSP=ffff8880166f7990 R8 =0000000000000001 R9 =ffff8880166f79e8 R10=0000000000038001 R11=000000000008a8e5 R12=ffff8880166f7a70 R13=0000000000000000 R14=ffff88800ee151c0 R15=0000000000000cc0 RIP=ffffffff811303b8 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 00007f286f709900 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=00007ffea23ff000 CR3=0000000019b46000 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=ffffffffffffffffffff000000000000 XMM01=000000000000003635006b6f6c6c756e XMM02=62003d73646e756f7200323135616873 XMM03=5320444f4854454d5f54505952434e45 XMM04=40404040404040404040404040404040 XMM05=5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a XMM06=20202020202020202020202020202020 XMM07=00000000000000000000000000000000 XMM08=00000000000000000000000000202020 XMM09=ff0000ffffffffffff00000000ffffff XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000