syzkaller login: [ 31.180705] BUG: Bad rss-counter state mm:000000007eb3c86a type:MM_FILEPAGES val:33 [ 31.182179] BUG: Bad rss-counter state mm:000000007eb3c86a type:MM_ANONPAGES val:22 [ 31.342822] ================================================================== [ 31.343815] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 31.344812] Read of size 8 at addr ffff888016b263f8 by task sshd/219 [ 31.345718] [ 31.345963] CPU: 0 PID: 219 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 31.346887] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 31.347945] Call Trace: [ 31.348289] [ 31.348593] dump_stack_lvl+0x91/0xf0 [ 31.349169] print_report+0xcc/0x620 [ 31.349703] ? __virt_addr_valid+0x102/0x340 [ 31.350288] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.350942] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.351603] kasan_report+0xbe/0xf0 [ 31.352111] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.352779] vma_interval_tree_remove+0xc75/0xec0 [ 31.353423] vma_prepare+0xc54/0x11a0 [ 31.353951] __split_vma+0x5af/0x950 [ 31.354474] ? __pfx___split_vma+0x10/0x10 [ 31.355031] ? find_held_lock+0x2c/0x110 [ 31.355579] do_vmi_align_munmap+0x2ba/0x11f0 [ 31.356178] ? lock_is_held_type+0x9f/0x120 [ 31.356755] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 31.357419] ? mtree_range_walk+0x632/0x900 [ 31.358023] ? mas_walk+0x5c7/0x7c0 [ 31.358546] do_vmi_munmap+0x1f1/0x2b0 [ 31.359090] mmap_region+0x1f9/0x2660 [ 31.359621] ? vm_mmap_pgoff+0x15c/0x3a0 [ 31.360183] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 31.360972] ? __pfx_lock_acquire+0x10/0x10 [ 31.361571] ? __pfx_mmap_region+0x10/0x10 [ 31.362163] ? security_mmap_addr+0x7d/0xa0 [ 31.362747] ? get_unmapped_area+0x1f5/0x3f0 [ 31.363374] do_mmap+0x854/0xf00 [ 31.363870] vm_mmap_pgoff+0x1a6/0x3a0 [ 31.364403] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 31.365000] ksys_mmap_pgoff+0x3af/0x500 [ 31.365556] do_syscall_64+0x3f/0x90 [ 31.366067] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.366749] RIP: 0033:0x7f1e3d2ecd82 [ 31.367235] 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 [ 31.369496] RSP: 002b:00007ffc485a85f8 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 31.370455] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f1e3d2ecd82 [ 31.371357] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f1e3c726000 [ 31.372251] RBP: 00007f1e3c726000 R08: 0000000000000009 R09: 0000000000001000 [ 31.373154] R10: 0000000000000812 R11: 0000000000000206 R12: 0000562d20ae6b20 [ 31.374065] R13: 00007ffc485a8610 R14: 00007ffc485a8640 R15: 00007ffc485a89a0 [ 31.374972] [ 31.375282] [ 31.375511] Allocated by task 212: [ 31.375964] kasan_save_stack+0x22/0x50 [ 31.376505] kasan_set_track+0x25/0x30 [ 31.377036] __kasan_slab_alloc+0x59/0x70 [ 31.377611] kmem_cache_alloc+0x16b/0x370 [ 31.378164] vm_area_dup+0x20/0x160 [ 31.378645] __split_vma+0x170/0x950 [ 31.379141] split_vma+0xc6/0x110 [ 31.379610] mprotect_fixup+0x8d2/0xb30 [ 31.380142] do_mprotect_pkey+0x87e/0xd40 [ 31.380721] __x64_sys_mprotect+0x78/0xc0 [ 31.381282] do_syscall_64+0x3f/0x90 [ 31.381805] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.382491] [ 31.382719] Freed by task 212: [ 31.383146] kasan_save_stack+0x22/0x50 [ 31.383681] kasan_set_track+0x25/0x30 [ 31.384203] kasan_save_free_info+0x2b/0x50 [ 31.384772] __kasan_slab_free+0x10a/0x190 [ 31.385343] kmem_cache_free+0x10d/0x4d0 [ 31.385911] rcu_core+0x8c8/0x2860 [ 31.386391] __do_softirq+0x1b7/0x7d4 [ 31.386895] [ 31.387128] Last potentially related work creation: [ 31.387755] kasan_save_stack+0x22/0x50 [ 31.388300] __kasan_record_aux_stack+0x8e/0xa0 [ 31.388910] __call_rcu_common.constprop.0+0x6a/0xb90 [ 31.389607] remove_vma+0x139/0x170 [ 31.390092] do_vmi_align_munmap+0xd4a/0x11f0 [ 31.390699] do_vmi_munmap+0x1f1/0x2b0 [ 31.391238] __vm_munmap+0x138/0x3a0 [ 31.391745] __x64_sys_munmap+0x59/0x80 [ 31.392293] do_syscall_64+0x3f/0x90 [ 31.392804] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.393523] [ 31.393754] The buggy address belongs to the object at ffff888016b263a0 [ 31.393754] which belongs to the cache vm_area_struct of size 168 [ 31.395339] The buggy address is located 88 bytes inside of [ 31.395339] freed 168-byte region [ffff888016b263a0, ffff888016b26448) [ 31.396825] [ 31.397058] The buggy address belongs to the physical page: [ 31.397778] page:0000000089771423 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x16b26 [ 31.398941] memcg:ffff88800f2ee701 [ 31.399395] flags: 0x100000000000200(slab|node=0|zone=1) [ 31.400077] page_type: 0xffffffff() [ 31.400568] raw: 0100000000000200 ffff88800879fc80 ffffea00003c0800 dead000000000004 [ 31.401582] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800f2ee701 [ 31.402573] page dumped because: kasan: bad access detected [ 31.403294] [ 31.403532] Memory state around the buggy address: [ 31.404169] ffff888016b26280: fc fc fc fc fc fc fc fa fb fb fb fb fb fb fb fb [ 31.405111] ffff888016b26300: fb fb fb fb fb fb fb fb fb fb fb fb fc fc fc fc [ 31.406064] >ffff888016b26380: fc fc fc fc fa fb fb fb fb fb fb fb fb fb fb fb [ 31.406998] ^ [ 31.407922] ffff888016b26400: fb fb fb fb fb fb fb fb fb fc fc fc fc fc fc fc [ 31.408863] ffff888016b26480: fc 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 31.409790] ================================================================== [ 31.410910] Disabling lock debugging due to kernel taint [ 33.523354] BUG: Bad rss-counter state mm:00000000bace5895 type:MM_FILEPAGES val:33 [ 33.524634] BUG: Bad rss-counter state mm:00000000bace5895 type:MM_ANONPAGES val:22 [ 34.076408] BUG: Bad rss-counter state mm:00000000ad716d8c type:MM_FILEPAGES val:33 [ 34.078008] BUG: Bad rss-counter state mm:00000000ad716d8c type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:62191' (ECDSA) to the list of known hosts. 2023/06/19 20:53:04 fuzzer started 2023/06/19 20:53:05 dialing manager at localhost:44161 2023/06/19 20:53:05 checking machine... 2023/06/19 20:53:05 checking revisions... [ 34.721399] kmemleak: Automatic memory scanning thread ended 2023/06/19 20:53:05 testing simple program... [ 34.766853] cgroup: Unknown subsys name 'net' [ 34.827059] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 20:53:02 Registers: info registers vcpu 0 RAX=dffffc0000000000 RBX=ffff888016146198 RCX=1ffff11002c286f8 RDX=1ffff11003353baf RSI=ffffffff87b86f80 RDI=ffff888019a82408 RBP=ffff888019a823f8 RSP=ffff888016057be8 R8 =0000000000000001 R9 =0000000000000246 R10=0000000000000003 R11=00000000000b6996 R12=ffff888019a823f9 R13=ffff888019a9dd78 R14=ffff8880161461a8 R15=ffff888016146198 RIP=ffffffff844cdf02 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 =0018 0000000000000000 ffffffff 00c09300 DPL=0 DS [-WA] DS =0000 0000000000000000 00000000 00000000 FS =0000 00007f099a710900 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=00007ffd5e23d000 CR3=0000000019ac2000 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=74696d7265705f6d61703d73726f746e XMM02=000000000000000000000000000000ff XMM03=5320444f4854454d5f54505952434e45 XMM04=40404040404040404040404040404040 XMM05=5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a XMM06=20202020202020202020202020202020 XMM07=00000000000000000000000000000000 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=00007fede6dfed20 CR3=0000000013b10000 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=f81870673606a59c5e4ba59e46b3111d XMM02=000000000011da20eff9b2d0a8fce9cb XMM03=000000000011daf02c67c8bc2e329bc3 XMM04=e6225dd7851ccf0400000000000ae988 XMM05=dfcdbad4f1609c370000000000134380 XMM06=9ab590eaac2db6fe00000000001331e8 XMM07=e042d86d42eb936e0000000000124a88 XMM08=3d8e3ca6b42daa42000000000011daf0 XMM09=00000000000000000000000000000000 XMM10=20200000000020202020202020200000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000