syzkaller login: [ 30.571914] BUG: Bad rss-counter state mm:00000000c6132ad7 type:MM_FILEPAGES val:33 [ 30.573228] BUG: Bad rss-counter state mm:00000000c6132ad7 type:MM_ANONPAGES val:22 [ 30.732571] ================================================================== [ 30.733476] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 30.734423] Read of size 8 at addr ffff8880182b13f8 by task sshd/220 [ 30.735286] [ 30.735502] CPU: 0 PID: 220 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 30.736352] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 30.737361] Call Trace: [ 30.737681] [ 30.737959] dump_stack_lvl+0x91/0xf0 [ 30.738467] print_report+0xcc/0x620 [ 30.738954] ? __virt_addr_valid+0x102/0x340 [ 30.739495] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.740115] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.740717] kasan_report+0xbe/0xf0 [ 30.741193] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.741807] vma_interval_tree_remove+0xc75/0xec0 [ 30.742422] vma_prepare+0xc54/0x11a0 [ 30.742894] __split_vma+0x5af/0x950 [ 30.743358] ? __pfx___split_vma+0x10/0x10 [ 30.743888] ? find_held_lock+0x2c/0x110 [ 30.744396] do_vmi_align_munmap+0x2ba/0x11f0 [ 30.744946] ? lock_is_held_type+0x9f/0x120 [ 30.745484] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 30.746082] ? mtree_range_walk+0x632/0x900 [ 30.746635] ? mas_walk+0x5c7/0x7c0 [ 30.747113] do_vmi_munmap+0x1f1/0x2b0 [ 30.747601] mmap_region+0x1f9/0x2660 [ 30.748076] ? vm_mmap_pgoff+0x15c/0x3a0 [ 30.748582] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 30.749282] ? __pfx_lock_acquire+0x10/0x10 [ 30.749805] ? __pfx_mmap_region+0x10/0x10 [ 30.750350] ? security_mmap_addr+0x7d/0xa0 [ 30.750870] ? get_unmapped_area+0x1f5/0x3f0 [ 30.751407] do_mmap+0x854/0xf00 [ 30.751844] vm_mmap_pgoff+0x1a6/0x3a0 [ 30.752328] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 30.752884] ksys_mmap_pgoff+0x3af/0x500 [ 30.753392] do_syscall_64+0x3f/0x90 [ 30.753865] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.754517] RIP: 0033:0x7ff17f34fd82 [ 30.754973] 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 [ 30.757068] RSP: 002b:00007ffe2df80238 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 30.757964] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007ff17f34fd82 [ 30.758809] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007ff17e789000 [ 30.759638] RBP: 00007ff17e789000 R08: 0000000000000009 R09: 0000000000001000 [ 30.760467] R10: 0000000000000812 R11: 0000000000000206 R12: 0000555d64d95f60 [ 30.761307] R13: 00007ffe2df80250 R14: 00007ffe2df80280 R15: 00007ffe2df805e0 [ 30.762173] [ 30.762472] [ 30.762695] Allocated by task 213: [ 30.763138] kasan_save_stack+0x22/0x50 [ 30.763648] kasan_set_track+0x25/0x30 [ 30.764140] __kasan_slab_alloc+0x59/0x70 [ 30.764673] kmem_cache_alloc+0x16b/0x370 [ 30.765203] vm_area_dup+0x20/0x160 [ 30.765678] __split_vma+0x170/0x950 [ 30.766170] split_vma+0xc6/0x110 [ 30.766628] mprotect_fixup+0x8d2/0xb30 [ 30.767153] do_mprotect_pkey+0x87e/0xd40 [ 30.767697] __x64_sys_mprotect+0x78/0xc0 [ 30.768232] do_syscall_64+0x3f/0x90 [ 30.768722] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.769385] [ 30.769609] Freed by task 13: [ 30.770008] kasan_save_stack+0x22/0x50 [ 30.770543] kasan_set_track+0x25/0x30 [ 30.771053] kasan_save_free_info+0x2b/0x50 [ 30.771616] __kasan_slab_free+0x10a/0x190 [ 30.772170] kmem_cache_free+0x10d/0x4d0 [ 30.772700] rcu_core+0x8c8/0x2860 [ 30.773172] __do_softirq+0x1b7/0x7d4 [ 30.773673] [ 30.773899] Last potentially related work creation: [ 30.774514] kasan_save_stack+0x22/0x50 [ 30.775038] __kasan_record_aux_stack+0x8e/0xa0 [ 30.775642] __call_rcu_common.constprop.0+0x6a/0xb90 [ 30.776316] remove_vma+0x139/0x170 [ 30.776784] do_vmi_align_munmap+0xd4a/0x11f0 [ 30.777366] do_vmi_munmap+0x1f1/0x2b0 [ 30.777871] __vm_munmap+0x138/0x3a0 [ 30.778366] __x64_sys_munmap+0x59/0x80 [ 30.778882] do_syscall_64+0x3f/0x90 [ 30.779370] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.780043] [ 30.780267] The buggy address belongs to the object at ffff8880182b13a0 [ 30.780267] which belongs to the cache vm_area_struct of size 168 [ 30.781805] The buggy address is located 88 bytes inside of [ 30.781805] freed 168-byte region [ffff8880182b13a0, ffff8880182b1448) [ 30.783286] [ 30.783511] The buggy address belongs to the physical page: [ 30.784204] page:000000007127d9c5 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x182b1 [ 30.785366] memcg:ffff88800e3b2301 [ 30.785800] flags: 0x100000000000200(slab|node=0|zone=1) [ 30.786500] page_type: 0xffffffff() [ 30.786980] raw: 0100000000000200 ffff8880087a0c80 dead000000000122 0000000000000000 [ 30.787946] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800e3b2301 [ 30.788901] page dumped because: kasan: bad access detected [ 30.789597] [ 30.789822] Memory state around the buggy address: [ 30.790435] ffff8880182b1280: fc fc fc fc fc fc fc 00 00 00 00 00 00 00 00 00 [ 30.791340] ffff8880182b1300: 00 00 00 00 00 00 00 00 00 00 00 00 fc fc fc fc [ 30.792240] >ffff8880182b1380: fc fc fc fc fa fb fb fb fb fb fb fb fb fb fb fb [ 30.793130] ^ [ 30.794013] ffff8880182b1400: fb fb fb fb fb fb fb fb fb fc fc fc fc fc fc fc [ 30.794932] ffff8880182b1480: fc fa fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 30.795834] ================================================================== [ 30.797097] Disabling lock debugging due to kernel taint [ 32.519543] BUG: Bad rss-counter state mm:0000000018a3147c type:MM_FILEPAGES val:33 [ 32.520354] BUG: Bad rss-counter state mm:0000000018a3147c type:MM_ANONPAGES val:22 [ 32.894572] BUG: Bad rss-counter state mm:00000000276fd6b5 type:MM_FILEPAGES val:33 [ 32.895958] BUG: Bad rss-counter state mm:00000000276fd6b5 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:48291' (ECDSA) to the list of known hosts. 2023/06/20 18:45:13 fuzzer started 2023/06/20 18:45:14 dialing manager at localhost:36067 2023/06/20 18:45:14 checking machine... 2023/06/20 18:45:14 checking revisions... [ 33.607603] kmemleak: Automatic memory scanning thread ended 2023/06/20 18:45:14 testing simple program... [ 33.643868] cgroup: Unknown subsys name 'net' [ 33.683272] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 18:45:13 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=00007fff333a8b78 CR3=0000000015ae2000 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=2033313a35343a3831203032206e754a XMM01=657463656e6e6f63736944203a5d3932 XMM02=302e303120746f6f722072657375206d XMM03=203a5d3932325b646873732072656c6c XMM04=69662068637573206f4e203a656c6163 XMM05=3a656c696620766e65206e65706f206f XMM06=65733a6468737328766e655f6d617020 XMM07=6b7a79732033313a35343a3831203032 XMM08=3d656e696c646d632022656369767265 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=0000000000000000 RBX=0000000000000002 RCX=ffffffff83723ce8 RDX=ffff888019ff1b40 RSI=0000000000000000 RDI=0000000000000005 RBP=0000000000000003 RSP=ffff888016ef77b8 R8 =0000000000000005 R9 =0000000000000000 R10=0000000000000000 R11=00000000000b6a61 R12=0000000000000002 R13=ffffffff87f99af0 R14=ffff88800ba7d100 R15=0000000000000006 RIP=ffffffff84538a40 RFL=00000293 [--S-A-C] 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 00007efd9a991900 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=00007efd9af48618 CR3=000000000c5e2000 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=6e69676f6c5f6d61702c78756e696c65 XMM02=755f6d61702c74696d7265705f6d6170 XMM03=2c766e655f6d61702c7374696d696c5f XMM04=6d61702c766e655f6d61702c7374696d XMM05=78696e755f6d61702c74696d7265705f XMM06=6469756e69676f6c5f6d61702c78756e XMM07=672065736f6c635f6e6f69737365733a XMM08=61662029286e65706f5f746964756100 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000