syzkaller login: [ 31.051803] BUG: Bad rss-counter state mm:00000000bfe5b5b0 type:MM_FILEPAGES val:33 [ 31.053627] BUG: Bad rss-counter state mm:00000000bfe5b5b0 type:MM_ANONPAGES val:22 [ 31.248465] ================================================================== [ 31.249626] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 31.250923] Read of size 8 at addr ffff88800d636880 by task sshd/220 [ 31.251896] [ 31.252126] CPU: 1 PID: 220 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 31.253053] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 31.254082] Call Trace: [ 31.254421] [ 31.254723] dump_stack_lvl+0x91/0xf0 [ 31.255247] print_report+0xcc/0x620 [ 31.255758] ? __virt_addr_valid+0x102/0x340 [ 31.256334] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.256982] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.257636] kasan_report+0xbe/0xf0 [ 31.258140] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.258790] vma_interval_tree_remove+0xc75/0xec0 [ 31.259424] vma_prepare+0xc54/0x11a0 [ 31.259923] __split_vma+0x5af/0x950 [ 31.260404] ? __pfx___split_vma+0x10/0x10 [ 31.260954] ? find_held_lock+0x2c/0x110 [ 31.261491] do_vmi_align_munmap+0x2ba/0x11f0 [ 31.262077] ? lock_is_held_type+0x9f/0x120 [ 31.262637] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 31.263285] ? mtree_range_walk+0x632/0x900 [ 31.263858] ? mas_walk+0x5c7/0x7c0 [ 31.264373] do_vmi_munmap+0x1f1/0x2b0 [ 31.264891] mmap_region+0x1f9/0x2660 [ 31.265399] ? vm_mmap_pgoff+0x15c/0x3a0 [ 31.265927] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 31.266663] ? __pfx_lock_acquire+0x10/0x10 [ 31.267217] ? __pfx_mmap_region+0x10/0x10 [ 31.267770] ? security_mmap_addr+0x7d/0xa0 [ 31.268317] ? get_unmapped_area+0x1f5/0x3f0 [ 31.268894] do_mmap+0x854/0xf00 [ 31.269355] vm_mmap_pgoff+0x1a6/0x3a0 [ 31.269888] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 31.270494] ksys_mmap_pgoff+0x3af/0x500 [ 31.271037] do_syscall_64+0x3f/0x90 [ 31.271577] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.272283] RIP: 0033:0x7fb5e663bd82 [ 31.272777] 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 [ 31.275063] RSP: 002b:00007fffc8d91468 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 31.276006] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007fb5e663bd82 [ 31.276884] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007fb5e5a75000 [ 31.277798] RBP: 00007fb5e5a75000 R08: 0000000000000009 R09: 0000000000001000 [ 31.278684] R10: 0000000000000812 R11: 0000000000000206 R12: 000055ee21792d90 [ 31.279593] R13: 00007fffc8d91480 R14: 00007fffc8d914b0 R15: 00007fffc8d91810 [ 31.280485] [ 31.280788] [ 31.281010] Allocated by task 213: [ 31.281457] kasan_save_stack+0x22/0x50 [ 31.281986] kasan_set_track+0x25/0x30 [ 31.282497] __kasan_slab_alloc+0x59/0x70 [ 31.283041] kmem_cache_alloc+0x16b/0x370 [ 31.283596] vm_area_dup+0x20/0x160 [ 31.284068] __split_vma+0x170/0x950 [ 31.284545] split_vma+0xc6/0x110 [ 31.285003] mprotect_fixup+0x8d2/0xb30 [ 31.285527] do_mprotect_pkey+0x87e/0xd40 [ 31.286064] __x64_sys_mprotect+0x78/0xc0 [ 31.286600] do_syscall_64+0x3f/0x90 [ 31.287103] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.287778] [ 31.288002] Freed by task 19: [ 31.288403] kasan_save_stack+0x22/0x50 [ 31.288928] kasan_set_track+0x25/0x30 [ 31.289437] kasan_save_free_info+0x2b/0x50 [ 31.289989] __kasan_slab_free+0x10a/0x190 [ 31.290543] kmem_cache_free+0x10d/0x4d0 [ 31.291080] rcu_core+0x8c8/0x2860 [ 31.291540] __do_softirq+0x1b7/0x7d4 [ 31.292147] [ 31.292382] Last potentially related work creation: [ 31.292988] kasan_save_stack+0x22/0x50 [ 31.293504] __kasan_record_aux_stack+0x8e/0xa0 [ 31.294092] __call_rcu_common.constprop.0+0x6a/0xb90 [ 31.294796] remove_vma+0x139/0x170 [ 31.295295] do_vmi_align_munmap+0xd4a/0x11f0 [ 31.295907] do_vmi_munmap+0x1f1/0x2b0 [ 31.296432] __vm_munmap+0x138/0x3a0 [ 31.296926] __x64_sys_munmap+0x59/0x80 [ 31.297447] do_syscall_64+0x3f/0x90 [ 31.297941] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.298607] [ 31.298827] The buggy address belongs to the object at ffff88800d636828 [ 31.298827] which belongs to the cache vm_area_struct of size 168 [ 31.300346] The buggy address is located 88 bytes inside of [ 31.300346] freed 168-byte region [ffff88800d636828, ffff88800d6368d0) [ 31.301755] [ 31.301976] The buggy address belongs to the physical page: [ 31.302641] page:000000004202c7b5 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xd636 [ 31.303755] memcg:ffff888017e38601 [ 31.304190] anon flags: 0x100000000000200(slab|node=0|zone=1) [ 31.304899] page_type: 0xffffffff() [ 31.305357] raw: 0100000000000200 ffff8880087a0c80 ffffea0000268b40 dead000000000007 [ 31.306293] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff888017e38601 [ 31.307227] page dumped because: kasan: bad access detected [ 31.307923] [ 31.308142] Memory state around the buggy address: [ 31.308737] ffff88800d636780: fb fb fb fb fb fb fb fb fb fb fb fb fb fc fc fc [ 31.309611] ffff88800d636800: fc fc fc fc fc fa fb fb fb fb fb fb fb fb fb fb [ 31.310483] >ffff88800d636880: fb fb fb fb fb fb fb fb fb fb fc fc fc fc fc fc [ 31.311355] ^ [ 31.311783] ffff88800d636900: fc fc 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 31.312655] ffff88800d636980: 00 00 00 00 00 00 00 fc fc fc fc fc fc fc fc 00 [ 31.313539] ================================================================== [ 31.314503] Disabling lock debugging due to kernel taint [ 33.318290] BUG: Bad rss-counter state mm:00000000af719522 type:MM_FILEPAGES val:33 [ 33.319352] BUG: Bad rss-counter state mm:00000000af719522 type:MM_ANONPAGES val:22 [ 33.845863] BUG: Bad rss-counter state mm:00000000fb92b099 type:MM_FILEPAGES val:33 [ 33.847067] BUG: Bad rss-counter state mm:00000000fb92b099 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:1244' (ECDSA) to the list of known hosts. 2023/06/20 22:29:36 fuzzer started 2023/06/20 22:29:37 dialing manager at localhost:36067 2023/06/20 22:29:37 checking machine... 2023/06/20 22:29:37 checking revisions... [ 34.423597] kmemleak: Automatic memory scanning thread ended 2023/06/20 22:29:37 testing simple program... [ 34.466946] cgroup: Unknown subsys name 'net' [ 34.523877] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 22:29:36 Registers: info registers vcpu 0 RAX=0000000080000000 RBX=ffffffff87f97640 RCX=0000000000000000 RDX=ffff888015cf0000 RSI=ffffffff83c60be5 RDI=0000000000000005 RBP=0000000000000000 RSP=ffff888016aaf6a0 R8 =0000000000000005 R9 =00000000000000ff R10=00000000000000b2 R11=00000a0000000a00 R12=0000000000000000 R13=00000000000000b2 R14=dffffc0000000000 R15=0000000000000001 RIP=ffffffff814c086b 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 00007f89d8c56900 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=00007f89d920d618 CR3=000000001be3c000 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=ffffffff8451250e RDX=ffffed100d9e6a01 RSI=0000000000000004 RDI=ffffffff81288ac5 RBP=dffffc0000000000 RSP=ffff888008e07e70 R8 =0000000000000000 R9 =ffffed100d9e6a00 R10=ffff88806cf35003 R11=ffff888008c04400 R12=ffffffff85d3d350 R13=1ffff110011c0fd3 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 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=00007fbbf1bb9980 CR3=000000000c440000 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=f4befb3017315797d944c154c0d68366 XMM02=2c67c8bc2e329bc3000000000011d6e8 XMM03=fb795ef6d65770560000000000121e88 XMM04=a77c9071bb027bf300000000000ae988 XMM05=e4cb8bb95a7664b60000000000131ce8 XMM06=c104b4d6b81fc2d70000000000130b50 XMM07=e042d86d42eb936e0000000000122108 XMM08=90e13bf222b603c6000000000011d748 XMM09=00000000000000000000000000000000 XMM10=20200000000020202020202020200000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000