syzkaller login: [ 34.308177] BUG: Bad rss-counter state mm:000000004b0caf1a type:MM_FILEPAGES val:33 [ 34.309442] BUG: Bad rss-counter state mm:000000004b0caf1a type:MM_ANONPAGES val:22 [ 34.470908] ================================================================== [ 34.471838] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 34.472792] Read of size 8 at addr ffff888009482880 by task sshd/221 [ 34.473559] [ 34.473873] CPU: 0 PID: 221 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 34.474756] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 34.475743] Call Trace: [ 34.476098] [ 34.476383] dump_stack_lvl+0x91/0xf0 [ 34.476894] print_report+0xcc/0x620 [ 34.477382] ? __virt_addr_valid+0x102/0x340 [ 34.477953] ? vma_interval_tree_remove+0xc75/0xec0 [ 34.478575] ? vma_interval_tree_remove+0xc75/0xec0 [ 34.479214] kasan_report+0xbe/0xf0 [ 34.479709] ? vma_interval_tree_remove+0xc75/0xec0 [ 34.480348] vma_interval_tree_remove+0xc75/0xec0 [ 34.480970] vma_prepare+0xc54/0x11a0 [ 34.481454] __split_vma+0x5af/0x950 [ 34.481940] ? __pfx___split_vma+0x10/0x10 [ 34.482473] ? find_held_lock+0x2c/0x110 [ 34.483021] do_vmi_align_munmap+0x2ba/0x11f0 [ 34.483582] ? lock_is_held_type+0x9f/0x120 [ 34.484154] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 34.484784] ? mtree_range_walk+0x632/0x900 [ 34.485336] ? mas_walk+0x5c7/0x7c0 [ 34.485827] do_vmi_munmap+0x1f1/0x2b0 [ 34.486322] mmap_region+0x1f9/0x2660 [ 34.486833] ? vm_mmap_pgoff+0x15c/0x3a0 [ 34.487347] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 34.488110] ? __pfx_lock_acquire+0x10/0x10 [ 34.488667] ? __pfx_mmap_region+0x10/0x10 [ 34.489198] ? security_mmap_addr+0x7d/0xa0 [ 34.489737] ? get_unmapped_area+0x1f5/0x3f0 [ 34.490291] do_mmap+0x854/0xf00 [ 34.490757] vm_mmap_pgoff+0x1a6/0x3a0 [ 34.491255] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 34.491829] ksys_mmap_pgoff+0x3af/0x500 [ 34.492366] do_syscall_64+0x3f/0x90 [ 34.492856] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 34.493509] RIP: 0033:0x7f457c351d82 [ 34.493987] 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 [ 34.496210] RSP: 002b:00007ffc2ac4db18 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 34.497130] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f457c351d82 [ 34.498020] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f457b78b000 [ 34.498944] RBP: 00007f457b78b000 R08: 0000000000000009 R09: 0000000000001000 [ 34.499812] R10: 0000000000000812 R11: 0000000000000206 R12: 00005620ea2f9ec0 [ 34.500690] R13: 00007ffc2ac4db30 R14: 00007ffc2ac4db60 R15: 00007ffc2ac4dec0 [ 34.501543] [ 34.501849] [ 34.502064] Allocated by task 214: [ 34.502491] kasan_save_stack+0x22/0x50 [ 34.503015] kasan_set_track+0x25/0x30 [ 34.503505] __kasan_slab_alloc+0x59/0x70 [ 34.504071] kmem_cache_alloc+0x16b/0x370 [ 34.504594] vm_area_dup+0x20/0x160 [ 34.505074] __split_vma+0x170/0x950 [ 34.505536] split_vma+0xc6/0x110 [ 34.505988] mprotect_fixup+0x8d2/0xb30 [ 34.506491] do_mprotect_pkey+0x87e/0xd40 [ 34.507027] __x64_sys_mprotect+0x78/0xc0 [ 34.507553] do_syscall_64+0x3f/0x90 [ 34.508068] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 34.508721] [ 34.508935] Freed by task 214: [ 34.509325] kasan_save_stack+0x22/0x50 [ 34.509842] kasan_set_track+0x25/0x30 [ 34.510336] kasan_save_free_info+0x2b/0x50 [ 34.510917] __kasan_slab_free+0x10a/0x190 [ 34.511468] kmem_cache_free+0x10d/0x4d0 [ 34.512010] rcu_core+0x8c8/0x2860 [ 34.512456] __do_softirq+0x1b7/0x7d4 [ 34.512959] [ 34.513177] Last potentially related work creation: [ 34.513791] kasan_save_stack+0x22/0x50 [ 34.514325] __kasan_record_aux_stack+0x8e/0xa0 [ 34.515078] __call_rcu_common.constprop.0+0x6a/0xb90 [ 34.515930] remove_vma+0x139/0x170 [ 34.516549] do_vmi_align_munmap+0xd4a/0x11f0 [ 34.517292] do_vmi_munmap+0x1f1/0x2b0 [ 34.517934] __vm_munmap+0x138/0x3a0 [ 34.518414] __x64_sys_munmap+0x59/0x80 [ 34.518951] do_syscall_64+0x3f/0x90 [ 34.519436] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 34.520111] [ 34.520327] Second to last potentially related work creation: [ 34.521035] kasan_save_stack+0x22/0x50 [ 34.521548] __kasan_record_aux_stack+0x8e/0xa0 [ 34.522156] __call_rcu_common.constprop.0+0x6a/0xb90 [ 34.522818] remove_vma+0x139/0x170 [ 34.523275] do_vmi_align_munmap+0xd4a/0x11f0 [ 34.523858] do_vmi_munmap+0x1f1/0x2b0 [ 34.524371] mmap_region+0x1f9/0x2660 [ 34.524862] do_mmap+0x854/0xf00 [ 34.525295] vm_mmap_pgoff+0x1a6/0x3a0 [ 34.525805] ksys_mmap_pgoff+0x3af/0x500 [ 34.526312] do_syscall_64+0x3f/0x90 [ 34.526811] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 34.527457] [ 34.527690] The buggy address belongs to the object at ffff888009482828 [ 34.527690] which belongs to the cache vm_area_struct of size 168 [ 34.529203] The buggy address is located 88 bytes inside of [ 34.529203] freed 168-byte region [ffff888009482828, ffff8880094828d0) [ 34.530665] [ 34.530894] The buggy address belongs to the physical page: [ 34.531546] page:000000006fedcb96 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x9482 [ 34.532670] memcg:ffff88800de80701 [ 34.533101] flags: 0x100000000000200(slab|node=0|zone=1) [ 34.533785] page_type: 0xffffffff() [ 34.534233] raw: 0100000000000200 ffff88800879fc80 ffffea00003cbac0 dead000000000008 [ 34.535174] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800de80701 [ 34.536121] page dumped because: kasan: bad access detected [ 34.536792] [ 34.537011] Memory state around the buggy address: [ 34.537593] ffff888009482780: 00 00 00 00 00 00 00 00 00 00 00 00 00 fc fc fc [ 34.538483] ffff888009482800: fc fc fc fc fc fa fb fb fb fb fb fb fb fb fb fb [ 34.539387] >ffff888009482880: fb fb fb fb fb fb fb fb fb fb fc fc fc fc fc fc [ 34.540347] ^ [ 34.540775] ffff888009482900: fc fc 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 34.541640] ffff888009482980: 00 00 00 00 00 00 00 fc fc fc fc fc fc fc fc 00 [ 34.542489] ================================================================== [ 34.543483] Disabling lock debugging due to kernel taint [ 36.557276] BUG: Bad rss-counter state mm:00000000a54d2146 type:MM_FILEPAGES val:33 [ 36.558469] BUG: Bad rss-counter state mm:00000000a54d2146 type:MM_ANONPAGES val:22 [ 37.120344] BUG: Bad rss-counter state mm:0000000013f90b85 type:MM_FILEPAGES val:33 [ 37.121508] BUG: Bad rss-counter state mm:0000000013f90b85 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:38263' (ECDSA) to the list of known hosts. 2023/06/19 13:35:25 fuzzer started 2023/06/19 13:35:26 dialing manager at localhost:44161 2023/06/19 13:35:26 checking machine... 2023/06/19 13:35:26 checking revisions... [ 37.745810] kmemleak: Automatic memory scanning thread ended 2023/06/19 13:35:26 testing simple program... [ 37.787510] cgroup: Unknown subsys name 'net' [ 37.837416] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 13:35:21 Registers: info registers vcpu 0 RAX=0000000080000000 RBX=dffffc0000000000 RCX=0000000000000000 RDX=ffff888014378000 RSI=ffffffff815a722f RDI=ffffffff852be148 RBP=ffff888014377d28 RSP=ffff888014377c58 R8 =0000000000000006 R9 =0000000000000101 R10=00000000000000cf R11=0000000000000000 R12=0000000000000015 R13=ffff888014377d60 R14=0000000000000015 R15=ffffc9000068d610 RIP=ffffffff814c0800 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 00007fb84721c900 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=00007fb84664bc50 CR3=000000000e5e6000 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=ffffffffffffffffffffffffffffffff XMM01=30306234386136303638616663356134 XMM02=38303062343861363036386166633561 XMM03=2f6c616e72756f6a2f676f6c2f6e7572 XMM04=535a8f4e95ba451b00000000000ae988 XMM05=468ecb041756e1d70000000000135998 XMM06=c291bd5c70af25b90000000000134788 XMM07=00000000000000000000000000000000 XMM08=415453454d49545f454d49544c414552 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=1ffffffff0bb2f15 RBX=ffffffff85d978a8 RCX=ffffffff8118ddc2 RDX=0000000000000000 RSI=ffffffff8609fada RDI=ffffffff85d97888 RBP=ffffffff85d978a8 RSP=ffff88806cf099b0 R8 =ffffffff8609fada R9 =ffff88806cf09aa8 R10=0000000000038001 R11=000000000000792d R12=ffffffff85d978ac R13=ffffffff85d97888 R14=ffffffff85d978a4 R15=dffffc0000000000 RIP=ffffffff8112fc7f RFL=00000212 [----A--] 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 00007fbe9f161900 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=00007ffee74da000 CR3=000000000df0c000 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=635f6e6f69737365733a4d41503d706f XMM01=6f6c5f6d61702c78756e696c65735f6d XMM02=61702c74696d7265705f6d61702c7469 XMM03=655f6d61702c7374696d696c5f6d6170 XMM04=3d6c616e696d72657420322e322e302e XMM05=3d656d616e74736f682022646873732f XMM06=746f6f72223d746363612078756e696c XMM07=6e655f6d61702c7374696d696c5f6d61 XMM08=652075253d64692073253d706f000000 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000