syzkaller login: [ 33.653871] sshd (213) used greatest stack depth: 24128 bytes left [ 33.655167] BUG: Bad rss-counter state mm:00000000a2a60d3d type:MM_FILEPAGES val:33 [ 33.656860] BUG: Bad rss-counter state mm:00000000a2a60d3d type:MM_ANONPAGES val:22 [ 33.821006] ================================================================== [ 33.821982] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 33.823013] Read of size 8 at addr ffff88800fb73b38 by task sshd/220 [ 33.824211] [ 33.824446] CPU: 1 PID: 220 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 33.825387] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 33.826429] Call Trace: [ 33.826798] [ 33.827118] dump_stack_lvl+0x91/0xf0 [ 33.827648] print_report+0xcc/0x620 [ 33.828170] ? __virt_addr_valid+0x102/0x340 [ 33.828755] ? vma_interval_tree_remove+0xc75/0xec0 [ 33.829432] ? vma_interval_tree_remove+0xc75/0xec0 [ 33.830133] kasan_report+0xbe/0xf0 [ 33.830645] ? vma_interval_tree_remove+0xc75/0xec0 [ 33.831368] vma_interval_tree_remove+0xc75/0xec0 [ 33.832034] vma_prepare+0xc54/0x11a0 [ 33.832574] __split_vma+0x5af/0x950 [ 33.833111] ? __pfx___split_vma+0x10/0x10 [ 33.833693] ? find_held_lock+0x2c/0x110 [ 33.834278] do_vmi_align_munmap+0x2ba/0x11f0 [ 33.834917] ? lock_is_held_type+0x9f/0x120 [ 33.835530] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 33.836212] ? mtree_range_walk+0x632/0x900 [ 33.836811] ? mas_walk+0x5c7/0x7c0 [ 33.837348] do_vmi_munmap+0x1f1/0x2b0 [ 33.837868] mmap_region+0x1f9/0x2660 [ 33.838392] ? vm_mmap_pgoff+0x15c/0x3a0 [ 33.838956] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 33.839738] ? __pfx_lock_acquire+0x10/0x10 [ 33.840316] ? __pfx_mmap_region+0x10/0x10 [ 33.840877] ? security_mmap_addr+0x7d/0xa0 [ 33.841456] ? get_unmapped_area+0x1f5/0x3f0 [ 33.842034] do_mmap+0x854/0xf00 [ 33.842516] vm_mmap_pgoff+0x1a6/0x3a0 [ 33.843069] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 33.843684] ksys_mmap_pgoff+0x3af/0x500 [ 33.844234] do_syscall_64+0x3f/0x90 [ 33.844735] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 33.845428] RIP: 0033:0x7f3be10b7d82 [ 33.845909] 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 [ 33.848244] RSP: 002b:00007ffe3031ffc8 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 33.849257] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f3be10b7d82 [ 33.850209] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f3be04f1000 [ 33.851161] RBP: 00007f3be04f1000 R08: 0000000000000009 R09: 0000000000001000 [ 33.852056] R10: 0000000000000812 R11: 0000000000000206 R12: 0000557e3ff85ec0 [ 33.852972] R13: 00007ffe3031ffe0 R14: 00007ffe30320010 R15: 00007ffe30320370 [ 33.853894] [ 33.854221] [ 33.854450] Allocated by task 213: [ 33.854922] kasan_save_stack+0x22/0x50 [ 33.855486] kasan_set_track+0x25/0x30 [ 33.856014] __kasan_slab_alloc+0x59/0x70 [ 33.856584] kmem_cache_alloc+0x16b/0x370 [ 33.857148] vm_area_dup+0x20/0x160 [ 33.857631] __split_vma+0x170/0x950 [ 33.858141] split_vma+0xc6/0x110 [ 33.858605] mprotect_fixup+0x8d2/0xb30 [ 33.859183] do_mprotect_pkey+0x87e/0xd40 [ 33.859738] __x64_sys_mprotect+0x78/0xc0 [ 33.860323] do_syscall_64+0x3f/0x90 [ 33.860824] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 33.861541] [ 33.861779] Freed by task 213: [ 33.862222] kasan_save_stack+0x22/0x50 [ 33.862782] kasan_set_track+0x25/0x30 [ 33.863350] kasan_save_free_info+0x2b/0x50 [ 33.863940] __kasan_slab_free+0x10a/0x190 [ 33.864673] kmem_cache_free+0x10d/0x4d0 [ 33.865398] rcu_core+0x8c8/0x2860 [ 33.865866] __do_softirq+0x1b7/0x7d4 [ 33.866387] [ 33.866614] Last potentially related work creation: [ 33.867293] kasan_save_stack+0x22/0x50 [ 33.867822] __kasan_record_aux_stack+0x8e/0xa0 [ 33.868437] __call_rcu_common.constprop.0+0x6a/0xb90 [ 33.869138] remove_vma+0x139/0x170 [ 33.869615] do_vmi_align_munmap+0xd4a/0x11f0 [ 33.870222] do_vmi_munmap+0x1f1/0x2b0 [ 33.870752] __vm_munmap+0x138/0x3a0 [ 33.871279] __x64_sys_munmap+0x59/0x80 [ 33.871801] do_syscall_64+0x3f/0x90 [ 33.872319] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 33.873004] [ 33.873257] The buggy address belongs to the object at ffff88800fb73ae0 [ 33.873257] which belongs to the cache vm_area_struct of size 168 [ 33.874836] The buggy address is located 88 bytes inside of [ 33.874836] freed 168-byte region [ffff88800fb73ae0, ffff88800fb73b88) [ 33.876351] [ 33.876582] The buggy address belongs to the physical page: [ 33.877286] page:000000006b55ceb8 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xfb73 [ 33.878454] memcg:ffff88800e6d5101 [ 33.878917] flags: 0x100000000000200(slab|node=0|zone=1) [ 33.879628] page_type: 0xffffffff() [ 33.880135] raw: 0100000000000200 ffff88800879fc80 dead000000000122 0000000000000000 [ 33.881136] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800e6d5101 [ 33.882122] page dumped because: kasan: bad access detected [ 33.882842] [ 33.883103] Memory state around the buggy address: [ 33.883771] ffff88800fb73a00: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 33.884742] ffff88800fb73a80: 00 00 00 00 fc fc fc fc fc fc fc fc fa fb fb fb [ 33.885718] >ffff88800fb73b00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 33.886713] ^ [ 33.887425] ffff88800fb73b80: fb fc fc fc fc fc fc fc fc fa fb fb fb fb fb fb [ 33.888398] ffff88800fb73c00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fc fc [ 33.889376] ================================================================== [ 33.890473] Disabling lock debugging due to kernel taint [ 35.955100] BUG: Bad rss-counter state mm:00000000ecc1dd7f type:MM_FILEPAGES val:33 [ 35.956237] BUG: Bad rss-counter state mm:00000000ecc1dd7f type:MM_ANONPAGES val:22 [ 36.459109] BUG: Bad rss-counter state mm:00000000a2b71059 type:MM_FILEPAGES val:33 [ 36.460281] BUG: Bad rss-counter state mm:00000000a2b71059 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:52095' (ECDSA) to the list of known hosts. 2023/06/19 19:04:47 fuzzer started 2023/06/19 19:04:48 dialing manager at localhost:44161 2023/06/19 19:04:48 checking machine... 2023/06/19 19:04:48 checking revisions... [ 37.264538] kmemleak: Automatic memory scanning thread ended 2023/06/19 19:04:48 testing simple program... [ 37.318782] cgroup: Unknown subsys name 'net' [ 37.357877] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 19:04:44 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=00007fa45415a4c0 CR3=000000000c702000 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=9cb919eae61eac89064e075407c1cd97 XMM02=ec2efd57dc4c00df000000000011e948 XMM03=b40594acb370fb5a000000000011ea18 XMM04=16b87e0d66f893b600000000000ae988 XMM05=19e9129bd510f2350000000000135100 XMM06=4fda316b135da52b0000000000134f88 XMM07=e042d86d42eb936e00000000001255c8 XMM08=b40594acb370fb5a000000000011ea18 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=0000000000000000 RBX=0000000000000000 RCX=ffffffff812d869a RDX=0000000000000000 RSI=0000000000000068 RDI=00000000000000ff RBP=0000000000000000 RSP=ffff888016b0f500 R8 =0000000000000000 R9 =fffffbfff0ba77da R10=ffffffff85d3bed7 R11=00000baf00000baf R12=0000000000000000 R13=0000000000000068 R14=dffffc0000000000 R15=ffffffff87f94640 RIP=ffffffff814c0380 RFL=00000282 [--S----] 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 00007fe6b1454900 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=00007ffd279e3000 CR3=0000000016d4c000 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