syzkaller login: [ 63.060338] BUG: Bad rss-counter state mm:0000000021f1a984 type:MM_FILEPAGES val:33 [ 63.061560] BUG: Bad rss-counter state mm:0000000021f1a984 type:MM_ANONPAGES val:22 [ 63.234746] ================================================================== [ 63.235659] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 63.236692] Read of size 8 at addr ffff88800ee7f880 by task sshd/220 [ 63.237616] [ 63.237840] CPU: 0 PID: 220 Comm: sshd Tainted: G L 6.4.0-rc7-next-20230619 #1 [ 63.238928] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 63.239912] Call Trace: [ 63.240232] [ 63.240528] dump_stack_lvl+0x91/0xf0 [ 63.241011] print_report+0xcc/0x620 [ 63.241502] ? __virt_addr_valid+0x102/0x340 [ 63.242044] ? vma_interval_tree_remove+0xc75/0xec0 [ 63.242677] ? vma_interval_tree_remove+0xc75/0xec0 [ 63.243293] kasan_report+0xbe/0xf0 [ 63.243824] ? vma_interval_tree_remove+0xc75/0xec0 [ 63.244475] vma_interval_tree_remove+0xc75/0xec0 [ 63.245080] vma_prepare+0xc54/0x11a0 [ 63.245559] __split_vma+0x5af/0x950 [ 63.246027] ? __pfx___split_vma+0x10/0x10 [ 63.246552] ? find_held_lock+0x2c/0x110 [ 63.247080] do_vmi_align_munmap+0x2ba/0x11f0 [ 63.247643] ? lock_is_held_type+0x9f/0x120 [ 63.248170] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 63.248782] ? mtree_range_walk+0x632/0x900 [ 63.249340] ? mas_walk+0x5c7/0x7c0 [ 63.249876] do_vmi_munmap+0x1f1/0x2b0 [ 63.250535] mmap_region+0x1f9/0x2660 [ 63.251056] ? vm_mmap_pgoff+0x15c/0x3a0 [ 63.251569] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 63.252279] ? __pfx_lock_acquire+0x10/0x10 [ 63.252846] ? __pfx_mmap_region+0x10/0x10 [ 63.253372] ? security_mmap_addr+0x7d/0xa0 [ 63.253895] ? get_unmapped_area+0x1f5/0x3f0 [ 63.254445] do_mmap+0x854/0xf00 [ 63.254890] vm_mmap_pgoff+0x1a6/0x3a0 [ 63.255379] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 63.255930] ksys_mmap_pgoff+0x3af/0x500 [ 63.256438] do_syscall_64+0x3f/0x90 [ 63.256915] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 63.257558] RIP: 0033:0x7f7c6e723d82 [ 63.258006] 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 [ 63.260124] RSP: 002b:00007fff9f2cdbd8 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 63.261039] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f7c6e723d82 [ 63.261876] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f7c6db5d000 [ 63.262711] RBP: 00007f7c6db5d000 R08: 0000000000000009 R09: 0000000000001000 [ 63.263568] R10: 0000000000000812 R11: 0000000000000206 R12: 000055b3accabec0 [ 63.264657] R13: 00007fff9f2cdbf0 R14: 00007fff9f2cdc20 R15: 00007fff9f2cdf80 [ 63.265520] [ 63.265809] [ 63.266023] Allocated by task 213: [ 63.266452] kasan_save_stack+0x22/0x50 [ 63.266955] kasan_set_track+0x25/0x30 [ 63.267442] __kasan_slab_alloc+0x59/0x70 [ 63.267964] kmem_cache_alloc+0x16b/0x370 [ 63.268487] vm_area_dup+0x20/0x160 [ 63.269011] __split_vma+0x170/0x950 [ 63.269637] split_vma+0xc6/0x110 [ 63.270079] mprotect_fixup+0x8d2/0xb30 [ 63.270576] do_mprotect_pkey+0x87e/0xd40 [ 63.271106] __x64_sys_mprotect+0x78/0xc0 [ 63.271626] do_syscall_64+0x3f/0x90 [ 63.272096] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 63.272760] [ 63.272973] Freed by task 213: [ 63.273359] kasan_save_stack+0x22/0x50 [ 63.273853] kasan_set_track+0x25/0x30 [ 63.274346] kasan_save_free_info+0x2b/0x50 [ 63.274912] __kasan_slab_free+0x10a/0x190 [ 63.275439] kmem_cache_free+0x10d/0x4d0 [ 63.275939] rcu_core+0x8c8/0x2860 [ 63.276389] __do_softirq+0x1b7/0x7d4 [ 63.276864] [ 63.277075] Last potentially related work creation: [ 63.277656] kasan_save_stack+0x22/0x50 [ 63.278167] __kasan_record_aux_stack+0x8e/0xa0 [ 63.278731] __call_rcu_common.constprop.0+0x6a/0xb90 [ 63.279364] remove_vma+0x139/0x170 [ 63.279812] do_vmi_align_munmap+0xd4a/0x11f0 [ 63.280360] do_vmi_munmap+0x1f1/0x2b0 [ 63.280845] __vm_munmap+0x138/0x3a0 [ 63.281314] __x64_sys_munmap+0x59/0x80 [ 63.281810] do_syscall_64+0x3f/0x90 [ 63.282280] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 63.282917] [ 63.283132] The buggy address belongs to the object at ffff88800ee7f828 [ 63.283132] which belongs to the cache vm_area_struct of size 168 [ 63.284604] The buggy address is located 88 bytes inside of [ 63.284604] freed 168-byte region [ffff88800ee7f828, ffff88800ee7f8d0) [ 63.286027] [ 63.286244] The buggy address belongs to the physical page: [ 63.286888] page:00000000ef938361 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xee7f [ 63.288157] memcg:ffff88800e4c4801 [ 63.288614] anon flags: 0x100000000000200(slab|node=0|zone=1) [ 63.289312] page_type: 0xffffffff() [ 63.289795] raw: 0100000000000200 ffff88800879fc80 ffffea00003b8dc0 dead000000000007 [ 63.290704] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800e4c4801 [ 63.291599] page dumped because: kasan: bad access detected [ 63.292246] [ 63.292547] Memory state around the buggy address: [ 63.293127] ffff88800ee7f780: fb fb fb fb fb fb fb fb fb fb fb fb fb fc fc fc [ 63.293970] ffff88800ee7f800: fc fc fc fc fc fa fb fb fb fb fb fb fb fb fb fb [ 63.294821] >ffff88800ee7f880: fb fb fb fb fb fb fb fb fb fb fc fc fc fc fc fc [ 63.295663] ^ [ 63.296070] ffff88800ee7f900: fc fc fa fb fb fb fb fb fb fb fb fb fb fb fb fb [ 63.296918] ffff88800ee7f980: fb fb fb fb fb fb fb fc fc fc fc fc fc fc fc 00 [ 63.297764] ================================================================== [ 63.298989] Disabling lock debugging due to kernel taint [ 65.670437] BUG: Bad rss-counter state mm:00000000e5eb5112 type:MM_FILEPAGES val:33 [ 65.671389] BUG: Bad rss-counter state mm:00000000e5eb5112 type:MM_ANONPAGES val:22 [ 66.207564] BUG: Bad rss-counter state mm:0000000074eb1526 type:MM_FILEPAGES val:33 [ 66.208582] BUG: Bad rss-counter state mm:0000000074eb1526 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:14934' (ECDSA) to the list of known hosts. 2023/06/20 01:08:27 fuzzer started 2023/06/20 01:08:27 dialing manager at localhost:44161 2023/06/20 01:08:27 checking machine... 2023/06/20 01:08:27 checking revisions... [ 66.866340] kmemleak: Automatic memory scanning thread ended 2023/06/20 01:08:27 testing simple program... [ 66.915034] cgroup: Unknown subsys name 'net' [ 66.971328] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 01:07:54 Registers: info registers vcpu 0 RAX=dffffc0000000000 RBX=ffff88806ce09a98 RCX=0000000000000002 RDX=1ffff1100d9c1355 RSI=ffff88806ce09e60 RDI=ffff88806ce09aa8 RBP=ffff88806ce09e60 RSP=ffff88806ce099f0 R8 =ffffffff86137008 R9 =ffff88806ce09ad8 R10=0000000000038001 R11=0000000000020cb4 R12=0000000000000008 R13=ffff88806ce02000 R14=ffff88806ce09e68 R15=ffff88806ce09a98 RIP=ffffffff81130468 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 00007fa685800900 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=00007fa685db7618 CR3=000000001a182000 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=ffff88806cf35000 RBX=0000000000000001 RCX=ffffffff8450c50e RDX=ffffed100d9e6a01 RSI=0000000000000004 RDI=ffffffff812889a5 RBP=dffffc0000000000 RSP=ffff888008e27e70 R8 =0000000000000000 R9 =ffffed100d9e6a00 R10=ffff88806cf35003 R11=0000000000000001 R12=ffffffff85d3bed0 R13=1ffff110011c4fd3 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 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=00007f65917e0ca0 CR3=000000000e978000 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=2037323a38303a3130203032206e754a XMM01=73732878696e755f6d6170203a5d3932 XMM02=65736f6c63206e6f6973736573203a29 XMM03=755f6d6170203a5d3932325b64687373 XMM04=69662068637573206f4e203a656c6163 XMM05=3a656c696620766e65206e65706f206f XMM06=65733a6468737328766e655f6d617020 XMM07=6b7a79732036323a38303a3130203032 XMM08=3d656e696c646d632022656369767265 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000