syzkaller login: [ 33.287394] BUG: Bad rss-counter state mm:00000000c695b24f type:MM_FILEPAGES val:33 [ 33.288159] BUG: Bad rss-counter state mm:00000000c695b24f type:MM_ANONPAGES val:22 [ 33.455990] ================================================================== [ 33.456679] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 33.457384] Read of size 8 at addr ffff88800c61d140 by task sshd/220 [ 33.457970] [ 33.458136] CPU: 1 PID: 220 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 33.458784] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 33.459519] Call Trace: [ 33.459755] [ 33.459971] dump_stack_lvl+0x91/0xf0 [ 33.460343] print_report+0xcc/0x620 [ 33.460705] ? __virt_addr_valid+0x102/0x340 [ 33.461287] ? vma_interval_tree_remove+0xc75/0xec0 [ 33.461768] ? vma_interval_tree_remove+0xc75/0xec0 [ 33.462231] kasan_report+0xbe/0xf0 [ 33.462587] ? vma_interval_tree_remove+0xc75/0xec0 [ 33.462955] vma_interval_tree_remove+0xc75/0xec0 [ 33.463293] vma_prepare+0xc54/0x11a0 [ 33.463566] __split_vma+0x5af/0x950 [ 33.463833] ? __pfx___split_vma+0x10/0x10 [ 33.464125] ? find_held_lock+0x2c/0x110 [ 33.464416] do_vmi_align_munmap+0x2ba/0x11f0 [ 33.464729] ? lock_is_held_type+0x9f/0x120 [ 33.465037] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 33.465372] ? mtree_range_walk+0x632/0x900 [ 33.465695] ? mas_walk+0x5c7/0x7c0 [ 33.465977] do_vmi_munmap+0x1f1/0x2b0 [ 33.466262] mmap_region+0x1f9/0x2660 [ 33.466546] ? vm_mmap_pgoff+0x15c/0x3a0 [ 33.466850] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 33.467268] ? __pfx_lock_acquire+0x10/0x10 [ 33.467586] ? __pfx_mmap_region+0x10/0x10 [ 33.467900] ? security_mmap_addr+0x7d/0xa0 [ 33.468214] ? get_unmapped_area+0x1f5/0x3f0 [ 33.468534] do_mmap+0x854/0xf00 [ 33.468794] vm_mmap_pgoff+0x1a6/0x3a0 [ 33.469093] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 33.469427] ksys_mmap_pgoff+0x3af/0x500 [ 33.469741] do_syscall_64+0x3f/0x90 [ 33.470033] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 33.470419] RIP: 0033:0x7f5528b91d82 [ 33.470695] 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 [ 33.471987] RSP: 002b:00007ffe6a3dc468 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 33.472529] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f5528b91d82 [ 33.473049] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f5527fcb000 [ 33.473566] RBP: 00007f5527fcb000 R08: 0000000000000009 R09: 0000000000001000 [ 33.474081] R10: 0000000000000812 R11: 0000000000000206 R12: 000055deb01f8d90 [ 33.474585] R13: 00007ffe6a3dc480 R14: 00007ffe6a3dc4b0 R15: 00007ffe6a3dc810 [ 33.475096] [ 33.475272] [ 33.475397] Allocated by task 213: [ 33.475657] kasan_save_stack+0x22/0x50 [ 33.475951] kasan_set_track+0x25/0x30 [ 33.476246] __kasan_slab_alloc+0x59/0x70 [ 33.476555] kmem_cache_alloc+0x16b/0x370 [ 33.476866] vm_area_dup+0x20/0x160 [ 33.477136] __split_vma+0x170/0x950 [ 33.477412] split_vma+0xc6/0x110 [ 33.477669] mprotect_fixup+0x8d2/0xb30 [ 33.477951] do_mprotect_pkey+0x87e/0xd40 [ 33.478240] __x64_sys_mprotect+0x78/0xc0 [ 33.478531] do_syscall_64+0x3f/0x90 [ 33.478807] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 33.479168] [ 33.479287] Freed by task 213: [ 33.479506] kasan_save_stack+0x22/0x50 [ 33.479790] kasan_set_track+0x25/0x30 [ 33.480066] kasan_save_free_info+0x2b/0x50 [ 33.480361] __kasan_slab_free+0x10a/0x190 [ 33.480657] kmem_cache_free+0x10d/0x4d0 [ 33.480939] rcu_core+0x8c8/0x2860 [ 33.481191] __do_softirq+0x1b7/0x7d4 [ 33.481457] [ 33.481591] Last potentially related work creation: [ 33.481917] kasan_save_stack+0x22/0x50 [ 33.482196] __kasan_record_aux_stack+0x8e/0xa0 [ 33.482515] __call_rcu_common.constprop.0+0x6a/0xb90 [ 33.482877] remove_vma+0x139/0x170 [ 33.483130] do_vmi_align_munmap+0xd4a/0x11f0 [ 33.483443] do_vmi_munmap+0x1f1/0x2b0 [ 33.483721] __vm_munmap+0x138/0x3a0 [ 33.483982] __x64_sys_munmap+0x59/0x80 [ 33.484258] do_syscall_64+0x3f/0x90 [ 33.484521] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 33.484882] [ 33.485003] The buggy address belongs to the object at ffff88800c61d0e8 [ 33.485003] which belongs to the cache vm_area_struct of size 168 [ 33.485823] The buggy address is located 88 bytes inside of [ 33.485823] freed 168-byte region [ffff88800c61d0e8, ffff88800c61d190) [ 33.486609] [ 33.486732] The buggy address belongs to the physical page: [ 33.487115] page:00000000539bb6f3 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xc61d [ 33.487761] memcg:ffff888018026c01 [ 33.488011] flags: 0x100000000000200(slab|node=0|zone=1) [ 33.488391] page_type: 0xffffffff() [ 33.488660] raw: 0100000000000200 ffff88800879fc80 dead000000000122 0000000000000000 [ 33.489210] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff888018026c01 [ 33.489756] page dumped because: kasan: bad access detected [ 33.490142] [ 33.490269] Memory state around the buggy address: [ 33.490612] ffff88800c61d000: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 33.491121] ffff88800c61d080: 00 00 00 00 00 fc fc fc fc fc fc fc fc fa fb fb [ 33.491631] >ffff88800c61d100: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 33.492140] ^ [ 33.492519] ffff88800c61d180: fb fb fc fc fc fc fc fc fc fc fa fb fb fb fb fb [ 33.493026] ffff88800c61d200: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fc [ 33.493540] ================================================================== [ 33.494127] Disabling lock debugging due to kernel taint [ 35.592986] BUG: Bad rss-counter state mm:0000000029a3b2d3 type:MM_FILEPAGES val:33 [ 35.594226] BUG: Bad rss-counter state mm:0000000029a3b2d3 type:MM_ANONPAGES val:22 [ 36.117479] BUG: Bad rss-counter state mm:000000002e06e909 type:MM_FILEPAGES val:33 [ 36.118895] BUG: Bad rss-counter state mm:000000002e06e909 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:3845' (ECDSA) to the list of known hosts. 2023/06/19 13:57:50 fuzzer started 2023/06/19 13:57:50 dialing manager at localhost:44161 2023/06/19 13:57:50 checking machine... 2023/06/19 13:57:50 checking revisions... [ 36.860668] kmemleak: Automatic memory scanning thread ended 2023/06/19 13:57:50 testing simple program... [ 36.906304] cgroup: Unknown subsys name 'net' [ 36.944309] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 13:57:48 Registers: info registers vcpu 0 RAX=dffffc0000000000 RBX=ffff888014357b40 RCX=0000000000000001 RDX=1ffff1100286af55 RSI=ffff888014357b30 RDI=ffff888014357aa8 RBP=ffff888014350000 RSP=ffff8880143579d8 R8 =0000000000000001 R9 =ffff888014357ad8 R10=0000000000038001 R11=0000000000003c0d R12=ffff888014357af8 R13=ffff888014357ae0 R14=ffff888014357b30 R15=ffff888014357a98 RIP=ffffffff81131ca6 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 00007f0c301d5900 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=00007f0c3078c618 CR3=000000000db2c000 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=563412feff00545000000000000080fe 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=00007f8eb8a79000 CR3=000000000d54e000 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=2a2e722d5046e5b1644ab1fb84136d4e XMM02=000000000011c938ec2efd57dc4c00df XMM03=0000000000123e78bb29aca366141bf2 XMM04=5ee46e0ee49be3cc00000000000ae988 XMM05=9b8cb53302e9c1f000000000001347c0 XMM06=c291bd5c70af25b90000000000133860 XMM07=e042d86d42eb936e00000000001240f8 XMM08=bb29aca366141bf2000000000011c998 XMM09=00000000000000000000000000000000 XMM10=20200000000020202020202020200000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000