syzkaller login: [ 31.639226] BUG: Bad rss-counter state mm:00000000a4bbb487 type:MM_FILEPAGES val:33 [ 31.640451] BUG: Bad rss-counter state mm:00000000a4bbb487 type:MM_ANONPAGES val:22 [ 31.680042] ================================================================== [ 31.680973] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 31.681842] Read of size 8 at addr ffff88801476d228 by task sshd/221 [ 31.682567] [ 31.682774] CPU: 0 PID: 221 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 31.683585] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 31.684522] Call Trace: [ 31.684825] [ 31.685096] dump_stack_lvl+0x91/0xf0 [ 31.685558] print_report+0xcc/0x620 [ 31.686016] ? __virt_addr_valid+0x102/0x340 [ 31.686541] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.687120] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.687701] kasan_report+0xbe/0xf0 [ 31.688163] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.688747] vma_interval_tree_remove+0xc75/0xec0 [ 31.689317] vma_prepare+0xc54/0x11a0 [ 31.689784] __split_vma+0x5af/0x950 [ 31.690244] ? __pfx___split_vma+0x10/0x10 [ 31.690764] ? find_held_lock+0x2c/0x110 [ 31.691275] do_vmi_align_munmap+0x2ba/0x11f0 [ 31.691826] ? lock_is_held_type+0x9f/0x120 [ 31.692363] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 31.692968] ? mtree_range_walk+0x632/0x900 [ 31.693507] ? mas_walk+0x5c7/0x7c0 [ 31.693972] do_vmi_munmap+0x1f1/0x2b0 [ 31.694456] mmap_region+0x1f9/0x2660 [ 31.694923] ? vm_mmap_pgoff+0x15c/0x3a0 [ 31.695428] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 31.696140] ? __pfx_lock_acquire+0x10/0x10 [ 31.696663] ? __pfx_mmap_region+0x10/0x10 [ 31.697188] ? security_mmap_addr+0x7d/0xa0 [ 31.697716] ? get_unmapped_area+0x1f5/0x3f0 [ 31.698250] do_mmap+0x854/0xf00 [ 31.698678] vm_mmap_pgoff+0x1a6/0x3a0 [ 31.699165] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 31.699710] ksys_mmap_pgoff+0x3af/0x500 [ 31.700211] do_syscall_64+0x3f/0x90 [ 31.700683] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.701317] RIP: 0033:0x7f4ad73f0d82 [ 31.701762] 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 [ 31.703843] RSP: 002b:00007ffc08d3e148 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 31.704759] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f4ad73f0d82 [ 31.705594] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f4ad682a000 [ 31.706580] RBP: 00007f4ad682a000 R08: 0000000000000009 R09: 0000000000001000 [ 31.707431] R10: 0000000000000812 R11: 0000000000000206 R12: 000056121eea7ec0 [ 31.708335] R13: 00007ffc08d3e160 R14: 00007ffc08d3e190 R15: 00007ffc08d3e4f0 [ 31.709221] [ 31.709530] [ 31.709749] Allocated by task 214: [ 31.710192] kasan_save_stack+0x22/0x50 [ 31.710701] kasan_set_track+0x25/0x30 [ 31.711199] __kasan_slab_alloc+0x59/0x70 [ 31.711733] kmem_cache_alloc+0x16b/0x370 [ 31.712272] vm_area_dup+0x20/0x160 [ 31.712740] __split_vma+0x170/0x950 [ 31.713211] split_vma+0xc6/0x110 [ 31.713658] mprotect_fixup+0x8d2/0xb30 [ 31.714167] do_mprotect_pkey+0x87e/0xd40 [ 31.714705] __x64_sys_mprotect+0x78/0xc0 [ 31.715245] do_syscall_64+0x3f/0x90 [ 31.715733] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.716427] [ 31.716652] Freed by task 214: [ 31.717061] kasan_save_stack+0x22/0x50 [ 31.717560] kasan_set_track+0x25/0x30 [ 31.718059] kasan_save_free_info+0x2b/0x50 [ 31.718596] __kasan_slab_free+0x10a/0x190 [ 31.719143] kmem_cache_free+0x10d/0x4d0 [ 31.719658] rcu_core+0x8c8/0x2860 [ 31.720127] __do_softirq+0x1b7/0x7d4 [ 31.720624] [ 31.720844] Last potentially related work creation: [ 31.721447] kasan_save_stack+0x22/0x50 [ 31.721947] __kasan_record_aux_stack+0x8e/0xa0 [ 31.722489] __call_rcu_common.constprop.0+0x6a/0xb90 [ 31.723139] remove_vma+0x139/0x170 [ 31.723598] do_vmi_align_munmap+0xd4a/0x11f0 [ 31.724177] do_vmi_munmap+0x1f1/0x2b0 [ 31.724677] __vm_munmap+0x138/0x3a0 [ 31.725147] __x64_sys_munmap+0x59/0x80 [ 31.725659] do_syscall_64+0x3f/0x90 [ 31.726146] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.726790] [ 31.727008] The buggy address belongs to the object at ffff88801476d1d0 [ 31.727008] which belongs to the cache vm_area_struct of size 168 [ 31.728523] The buggy address is located 88 bytes inside of [ 31.728523] freed 168-byte region [ffff88801476d1d0, ffff88801476d278) [ 31.729898] [ 31.730110] The buggy address belongs to the physical page: [ 31.730763] page:000000006b1e42ba refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x1476d [ 31.731852] memcg:ffff8880145f7701 [ 31.732280] flags: 0x100000000000200(slab|node=0|zone=1) [ 31.732885] page_type: 0xffffffff() [ 31.733311] raw: 0100000000000200 ffff88800879fc80 dead000000000122 0000000000000000 [ 31.734182] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff8880145f7701 [ 31.735118] page dumped because: kasan: bad access detected [ 31.735747] [ 31.735961] Memory state around the buggy address: [ 31.736507] ffff88801476d100: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 31.737304] ffff88801476d180: 00 00 fc fc fc fc fc fc fc fc fa fb fb fb fb fb [ 31.738105] >ffff88801476d200: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fc [ 31.738954] ^ [ 31.739602] ffff88801476d280: fc fc fc fc fc fc fc fa fb fb fb fb fb fb fb fb [ 31.740477] ffff88801476d300: fb fb fb fb fb fb fb fb fb fb fb fb fc fc fc fc [ 31.741413] ================================================================== [ 31.742931] Disabling lock debugging due to kernel taint [ 34.453167] BUG: Bad rss-counter state mm:00000000122b4f78 type:MM_FILEPAGES val:33 [ 34.454790] BUG: Bad rss-counter state mm:00000000122b4f78 type:MM_ANONPAGES val:22 [ 35.036173] BUG: Bad rss-counter state mm:000000006b561472 type:MM_FILEPAGES val:33 [ 35.037371] BUG: Bad rss-counter state mm:000000006b561472 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:18909' (ECDSA) to the list of known hosts. 2023/06/20 02:22:19 fuzzer started 2023/06/20 02:22:19 dialing manager at localhost:44161 2023/06/20 02:22:19 checking machine... 2023/06/20 02:22:19 checking revisions... [ 35.559599] kmemleak: Automatic memory scanning thread ended 2023/06/20 02:22:19 testing simple program... [ 35.607265] cgroup: Unknown subsys name 'net' [ 35.652722] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 02:22:19 Registers: info registers vcpu 0 RAX=ffff88806ce35000 RBX=0000000000000000 RCX=ffffffff8450c50e RDX=ffffed100d9c6a01 RSI=0000000000000004 RDI=ffffffff812889a5 RBP=dffffc0000000000 RSP=ffffffff85407e10 R8 =0000000000000000 R9 =ffffed100d9c6a00 R10=ffff88806ce35003 R11=ffff888008c58000 R12=ffffffff85d3bed0 R13=1ffffffff0a80fc7 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 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=00007f69e5656018 CR3=000000000c740000 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=2039313a32323a3230203032206e754a XMM01=73732878696e755f6d6170203a5d3033 XMM02=65736f6c63206e6f6973736573203a29 XMM03=755f6d6170203a5d3033325b64687373 XMM04=69662068637573206f4e203a656c6163 XMM05=3a656c696620766e65206e65706f206f XMM06=65733a6468737328766e655f6d617020 XMM07=6b7a79732038313a32323a3230203032 XMM08=3d656e696c646d632022656369767265 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=0000000000000000 RBX=0000000000000000 RCX=0000000000000000 RDX=ffff888016bad1c0 RSI=ffffffff814c84fa RDI=0000000000000005 RBP=0000000000000000 RSP=ffff8880164bf988 R8 =0000000000000005 R9 =0000000000000000 R10=0000000000000000 R11=00000000000b6996 R12=0000000000000000 R13=0000000000000000 R14=ffffffff85652988 R15=ffff888016b7e980 RIP=ffffffff81374464 RFL=00000293 [--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 00007f88f930f900 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=00007ffc87dd1000 CR3=000000000da18000 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=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