syzkaller login: [ 31.244460] BUG: Bad rss-counter state mm:00000000b0d03e9f type:MM_FILEPAGES val:33 [ 31.245700] BUG: Bad rss-counter state mm:00000000b0d03e9f type:MM_ANONPAGES val:22 [ 31.282212] ================================================================== [ 31.283059] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 31.283819] Read of size 8 at addr ffff88800f942140 by task sshd/220 [ 31.284446] [ 31.284622] CPU: 0 PID: 220 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 31.285337] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 31.286215] Call Trace: [ 31.286483] [ 31.286713] dump_stack_lvl+0x91/0xf0 [ 31.287113] print_report+0xcc/0x620 [ 31.287505] ? __virt_addr_valid+0x102/0x340 [ 31.287964] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.288465] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.288956] kasan_report+0xbe/0xf0 [ 31.289341] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.289840] vma_interval_tree_remove+0xc75/0xec0 [ 31.290361] vma_prepare+0xc54/0x11a0 [ 31.290755] __split_vma+0x5af/0x950 [ 31.291130] ? __pfx___split_vma+0x10/0x10 [ 31.291557] ? find_held_lock+0x2c/0x110 [ 31.291976] do_vmi_align_munmap+0x2ba/0x11f0 [ 31.292440] ? lock_is_held_type+0x9f/0x120 [ 31.292871] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 31.293365] ? mtree_range_walk+0x632/0x900 [ 31.293811] ? mas_walk+0x5c7/0x7c0 [ 31.294210] do_vmi_munmap+0x1f1/0x2b0 [ 31.294609] mmap_region+0x1f9/0x2660 [ 31.294995] ? vm_mmap_pgoff+0x15c/0x3a0 [ 31.295416] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 31.296004] ? __pfx_lock_acquire+0x10/0x10 [ 31.296441] ? __pfx_mmap_region+0x10/0x10 [ 31.296871] ? security_mmap_addr+0x7d/0xa0 [ 31.297309] ? get_unmapped_area+0x1f5/0x3f0 [ 31.297766] do_mmap+0x854/0xf00 [ 31.298144] vm_mmap_pgoff+0x1a6/0x3a0 [ 31.298547] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 31.299011] ksys_mmap_pgoff+0x3af/0x500 [ 31.299421] do_syscall_64+0x3f/0x90 [ 31.299807] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.300325] RIP: 0033:0x7f1e87c16d82 [ 31.300703] 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 [ 31.302457] RSP: 002b:00007ffc944d8cf8 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 31.303201] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f1e87c16d82 [ 31.303896] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f1e87050000 [ 31.304597] RBP: 00007f1e87050000 R08: 0000000000000009 R09: 0000000000001000 [ 31.305291] R10: 0000000000000812 R11: 0000000000000206 R12: 0000559e34f94ec0 [ 31.305985] R13: 00007ffc944d8d10 R14: 00007ffc944d8d40 R15: 00007ffc944d90a0 [ 31.306710] [ 31.306950] [ 31.307125] Allocated by task 213: [ 31.307486] kasan_save_stack+0x22/0x50 [ 31.307901] kasan_set_track+0x25/0x30 [ 31.308309] __kasan_slab_alloc+0x59/0x70 [ 31.308735] kmem_cache_alloc+0x16b/0x370 [ 31.309160] vm_area_dup+0x20/0x160 [ 31.309535] __split_vma+0x170/0x950 [ 31.309918] split_vma+0xc6/0x110 [ 31.310298] mprotect_fixup+0x8d2/0xb30 [ 31.310706] do_mprotect_pkey+0x87e/0xd40 [ 31.311137] __x64_sys_mprotect+0x78/0xc0 [ 31.311559] do_syscall_64+0x3f/0x90 [ 31.311943] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.312473] [ 31.312654] Freed by task 213: [ 31.312974] kasan_save_stack+0x22/0x50 [ 31.313393] kasan_set_track+0x25/0x30 [ 31.313793] kasan_save_free_info+0x2b/0x50 [ 31.314242] __kasan_slab_free+0x10a/0x190 [ 31.314679] kmem_cache_free+0x10d/0x4d0 [ 31.315107] rcu_core+0x8c8/0x2860 [ 31.315475] __do_softirq+0x1b7/0x7d4 [ 31.315874] [ 31.316052] Last potentially related work creation: [ 31.316541] kasan_save_stack+0x22/0x50 [ 31.316960] __kasan_record_aux_stack+0x8e/0xa0 [ 31.317417] __call_rcu_common.constprop.0+0x6a/0xb90 [ 31.317956] remove_vma+0x139/0x170 [ 31.318356] do_vmi_align_munmap+0xd4a/0x11f0 [ 31.318809] do_vmi_munmap+0x1f1/0x2b0 [ 31.319212] __vm_munmap+0x138/0x3a0 [ 31.319589] __x64_sys_munmap+0x59/0x80 [ 31.320003] do_syscall_64+0x3f/0x90 [ 31.320397] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.320923] [ 31.321102] The buggy address belongs to the object at ffff88800f9420e8 [ 31.321102] which belongs to the cache vm_area_struct of size 168 [ 31.322328] The buggy address is located 88 bytes inside of [ 31.322328] freed 168-byte region [ffff88800f9420e8, ffff88800f942190) [ 31.323475] [ 31.323653] The buggy address belongs to the physical page: [ 31.324205] page:00000000df8da116 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xf942 [ 31.325090] memcg:ffff88800e0e1f01 [ 31.325440] flags: 0x100000000000200(slab|node=0|zone=1) [ 31.325973] page_type: 0xffffffff() [ 31.326363] raw: 0100000000000200 ffff88800879fc80 dead000000000122 0000000000000000 [ 31.327119] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800e0e1f01 [ 31.327869] page dumped because: kasan: bad access detected [ 31.328407] [ 31.328580] Memory state around the buggy address: [ 31.329051] ffff88800f942000: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 31.329745] ffff88800f942080: 00 00 00 00 00 fc fc fc fc fc fc fc fc fa fb fb [ 31.330473] >ffff88800f942100: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 31.331186] ^ [ 31.331708] ffff88800f942180: fb fb fc fc fc fc fc fc fc fc fa fb fb fb fb fb [ 31.332402] ffff88800f942200: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fc [ 31.333109] ================================================================== [ 31.334012] Disabling lock debugging due to kernel taint [ 33.013719] BUG: Bad rss-counter state mm:00000000612d22de type:MM_FILEPAGES val:33 [ 33.015152] BUG: Bad rss-counter state mm:00000000612d22de type:MM_ANONPAGES val:22 [ 33.368156] BUG: Bad rss-counter state mm:000000001ec89fc8 type:MM_FILEPAGES val:33 [ 33.369619] BUG: Bad rss-counter state mm:000000001ec89fc8 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:46153' (ECDSA) to the list of known hosts. 2023/06/20 02:55:46 fuzzer started 2023/06/20 02:55:46 dialing manager at localhost:44161 2023/06/20 02:55:46 checking machine... 2023/06/20 02:55:46 checking revisions... [ 33.977062] kmemleak: Automatic memory scanning thread ended 2023/06/20 02:55:46 testing simple program... [ 34.021510] cgroup: Unknown subsys name 'net' [ 34.075198] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 02:55:45 Registers: info registers vcpu 0 RAX=0000000080000000 RBX=0000000000000000 RCX=0000000000000000 RDX=ffff88800f8ad1c0 RSI=ffffffff810ac51d RDI=0000000000000001 RBP=ffff88800f8ad1c0 RSP=ffff888018d27ed0 R8 =0000000000000001 R9 =0000000000000000 R10=0000000000000000 R11=0000000000000000 R12=0000000000000000 R13=ffff88800f8ae840 R14=00007f5532015618 R15=0000000000000000 RIP=ffffffff814c07eb RFL=00000046 [---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 =0000 0000000000000000 00000000 00000000 DS =0000 0000000000000000 00000000 00000000 FS =0000 00007f5531a5e900 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=00007f5532015618 CR3=00000000169ec000 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=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 info registers vcpu 1 RAX=0000000000000000 RBX=ffff88806cf2c240 RCX=0000000000000000 RDX=ffff888008d751c0 RSI=0000000000000001 RDI=ffff88806cf2c240 RBP=0000000000000001 RSP=ffff888008e27e10 R8 =0000000000000001 R9 =0000000000000000 R10=0000000000000001 R11=ffff888008c58400 R12=ffff88806cf2c2f8 R13=1ffff110011c4fd3 R14=0000000000000001 R15=0000000000000000 RIP=ffffffff813fa922 RFL=00000093 [--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 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=00007f1002e0c380 CR3=000000000cc0e000 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=f5cabcc81e0dc38f8d41bd93174270b6 XMM02=000000000011f160eff9b2d0a8fce9cb XMM03=000000000011f2302c67c8bc2e329bc3 XMM04=7d293c49fcd85c4400000000000ae988 XMM05=19e9129bd510f2350000000000135760 XMM06=f18b3757f889d35200000000001345c8 XMM07=e042d86d42eb936e0000000000125e80 XMM08=5f71437e1add845f000000000011f230 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000