syzkaller login: [ 34.849345] BUG: Bad rss-counter state mm:00000000e6772c36 type:MM_FILEPAGES val:33 [ 34.850787] BUG: Bad rss-counter state mm:00000000e6772c36 type:MM_ANONPAGES val:22 [ 35.014270] ================================================================== [ 35.015198] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 35.016129] Read of size 8 at addr ffff88800e5936b0 by task sshd/221 [ 35.016898] [ 35.017123] CPU: 0 PID: 221 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 35.018106] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 35.019106] Call Trace: [ 35.019431] [ 35.019729] dump_stack_lvl+0x91/0xf0 [ 35.020219] print_report+0xcc/0x620 [ 35.020703] ? __virt_addr_valid+0x102/0x340 [ 35.021263] ? vma_interval_tree_remove+0xc75/0xec0 [ 35.021875] ? vma_interval_tree_remove+0xc75/0xec0 [ 35.022497] kasan_report+0xbe/0xf0 [ 35.022975] ? vma_interval_tree_remove+0xc75/0xec0 [ 35.023604] vma_interval_tree_remove+0xc75/0xec0 [ 35.024207] vma_prepare+0xc54/0x11a0 [ 35.024692] __split_vma+0x5af/0x950 [ 35.025164] ? __pfx___split_vma+0x10/0x10 [ 35.025696] ? find_held_lock+0x2c/0x110 [ 35.026228] do_vmi_align_munmap+0x2ba/0x11f0 [ 35.026808] ? lock_is_held_type+0x9f/0x120 [ 35.027349] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 35.027956] ? mtree_range_walk+0x632/0x900 [ 35.028502] ? mas_walk+0x5c7/0x7c0 [ 35.028969] do_vmi_munmap+0x1f1/0x2b0 [ 35.029457] mmap_region+0x1f9/0x2660 [ 35.029943] ? vm_mmap_pgoff+0x15c/0x3a0 [ 35.030482] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 35.031198] ? __pfx_lock_acquire+0x10/0x10 [ 35.031730] ? __pfx_mmap_region+0x10/0x10 [ 35.032258] ? security_mmap_addr+0x7d/0xa0 [ 35.032779] ? get_unmapped_area+0x1f5/0x3f0 [ 35.033331] do_mmap+0x854/0xf00 [ 35.033764] vm_mmap_pgoff+0x1a6/0x3a0 [ 35.034261] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 35.034833] ksys_mmap_pgoff+0x3af/0x500 [ 35.035340] do_syscall_64+0x3f/0x90 [ 35.035809] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 35.036466] RIP: 0033:0x7f1c4d02fd82 [ 35.036923] 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 [ 35.039092] RSP: 002b:00007ffd8abd3f38 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 35.040009] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f1c4d02fd82 [ 35.040855] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f1c4c469000 [ 35.041703] RBP: 00007f1c4c469000 R08: 0000000000000009 R09: 0000000000001000 [ 35.042563] R10: 0000000000000812 R11: 0000000000000206 R12: 000055e0f9538ec0 [ 35.043417] R13: 00007ffd8abd3f50 R14: 00007ffd8abd3f80 R15: 00007ffd8abd42e0 [ 35.044273] [ 35.044563] [ 35.044778] Allocated by task 214: [ 35.045207] kasan_save_stack+0x22/0x50 [ 35.045714] kasan_set_track+0x25/0x30 [ 35.046205] __kasan_slab_alloc+0x59/0x70 [ 35.046745] kmem_cache_alloc+0x16b/0x370 [ 35.047265] vm_area_dup+0x20/0x160 [ 35.047721] __split_vma+0x170/0x950 [ 35.048188] split_vma+0xc6/0x110 [ 35.048622] mprotect_fixup+0x8d2/0xb30 [ 35.049133] do_mprotect_pkey+0x87e/0xd40 [ 35.049655] __x64_sys_mprotect+0x78/0xc0 [ 35.050177] do_syscall_64+0x3f/0x90 [ 35.050659] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 35.051307] [ 35.051523] Freed by task 13: [ 35.051906] kasan_save_stack+0x22/0x50 [ 35.052411] kasan_set_track+0x25/0x30 [ 35.052902] kasan_save_free_info+0x2b/0x50 [ 35.053434] __kasan_slab_free+0x10a/0x190 [ 35.053968] kmem_cache_free+0x10d/0x4d0 [ 35.054482] rcu_core+0x8c8/0x2860 [ 35.054928] __do_softirq+0x1b7/0x7d4 [ 35.055409] [ 35.055627] Last potentially related work creation: [ 35.056216] kasan_save_stack+0x22/0x50 [ 35.056730] __kasan_record_aux_stack+0x8e/0xa0 [ 35.057306] __call_rcu_common.constprop.0+0x6a/0xb90 [ 35.057953] remove_vma+0x139/0x170 [ 35.058420] do_vmi_align_munmap+0xd4a/0x11f0 [ 35.058980] do_vmi_munmap+0x1f1/0x2b0 [ 35.059464] __vm_munmap+0x138/0x3a0 [ 35.059932] __x64_sys_munmap+0x59/0x80 [ 35.060430] do_syscall_64+0x3f/0x90 [ 35.060900] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 35.061539] [ 35.061757] The buggy address belongs to the object at ffff88800e593658 [ 35.061757] which belongs to the cache vm_area_struct of size 168 [ 35.063228] The buggy address is located 88 bytes inside of [ 35.063228] freed 168-byte region [ffff88800e593658, ffff88800e593700) [ 35.064632] [ 35.064846] The buggy address belongs to the physical page: [ 35.065528] page:00000000f369ef04 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xe593 [ 35.066681] memcg:ffff888014370501 [ 35.067126] flags: 0x100000000000200(slab|node=0|zone=1) [ 35.067799] page_type: 0xffffffff() [ 35.068267] raw: 0100000000000200 ffff88800879fc80 dead000000000122 0000000000000000 [ 35.069234] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff888014370501 [ 35.070190] page dumped because: kasan: bad access detected [ 35.070907] [ 35.071133] Memory state around the buggy address: [ 35.071737] ffff88800e593580: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 35.072626] ffff88800e593600: 00 00 00 fc fc fc fc fc fc fc fc fa fb fb fb fb [ 35.073533] >ffff88800e593680: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 35.074448] ^ [ 35.075069] ffff88800e593700: fc fc fc fc fc fc fc fc fa fb fb fb fb fb fb fb [ 35.075968] ffff88800e593780: fb fb fb fb fb fb fb fb fb fb fb fb fb fc fc fc [ 35.076855] ================================================================== [ 35.077876] Disabling lock debugging due to kernel taint [ 37.036944] BUG: Bad rss-counter state mm:000000001ed2354b type:MM_FILEPAGES val:33 [ 37.037710] BUG: Bad rss-counter state mm:000000001ed2354b type:MM_ANONPAGES val:22 [ 37.428188] BUG: Bad rss-counter state mm:000000001dc60415 type:MM_FILEPAGES val:33 [ 37.428863] BUG: Bad rss-counter state mm:000000001dc60415 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:42624' (ECDSA) to the list of known hosts. 2023/06/19 12:31:25 fuzzer started 2023/06/19 12:31:25 dialing manager at localhost:44161 2023/06/19 12:31:25 checking machine... 2023/06/19 12:31:25 checking revisions... [ 38.069683] kmemleak: Automatic memory scanning thread ended 2023/06/19 12:31:25 testing simple program... [ 38.121367] cgroup: Unknown subsys name 'net' [ 38.179224] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 12:31:19 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=0000000000000001 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=00007f06bbfcd000 CR3=00000000136ca000 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=4d9a1a3f60a369b9264bf780108b1469 XMM02=2c67c8bc2e329bc3000000000011f8e0 XMM03=fb795ef6d65770560000000000123fa8 XMM04=75e8f42ec16616ee00000000000ae988 XMM05=be9cb613f6346d640000000000133ff8 XMM06=c291bd5c70af25b900000000001339f0 XMM07=e042d86d42eb936e0000000000124228 XMM08=28a6ac1848499691000000000011f940 XMM09=00000000000000000000000000000000 XMM10=20200000000020202020202020200000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=1ffff110018ca71d RBX=ffff88800c6538b8 RCX=1ffff1100206bdb6 RDX=dffffc0000000000 RSI=ffff888016d22000 RDI=ffff88800c6538e8 RBP=ffff88801035ed80 RSP=ffff888016f6f638 R8 =0000000000000001 R9 =0000000000000246 R10=0000000000000003 R11=00000000000b6996 R12=ffff888016d20000 R13=0000000000000000 R14=ffff88800ced73d8 R15=ffff88800ced7390 RIP=ffffffff818474fe 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 00007efd0d6af900 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=00007fffe5bf1000 CR3=000000000eaea000 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