syzkaller login: [ 31.286860] BUG: Bad rss-counter state mm:00000000a6a30c33 type:MM_FILEPAGES val:33 [ 31.288489] BUG: Bad rss-counter state mm:00000000a6a30c33 type:MM_ANONPAGES val:22 [ 31.450526] ================================================================== [ 31.451635] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 31.452786] Read of size 8 at addr ffff88801a358058 by task sshd/220 [ 31.453834] [ 31.454055] CPU: 1 PID: 220 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 31.454958] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 31.456016] Call Trace: [ 31.456356] [ 31.456645] dump_stack_lvl+0x91/0xf0 [ 31.457161] print_report+0xcc/0x620 [ 31.457660] ? __virt_addr_valid+0x102/0x340 [ 31.458239] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.458872] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.459506] kasan_report+0xbe/0xf0 [ 31.460000] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.460645] vma_interval_tree_remove+0xc75/0xec0 [ 31.461282] vma_prepare+0xc54/0x11a0 [ 31.461775] __split_vma+0x5af/0x950 [ 31.462261] ? __pfx___split_vma+0x10/0x10 [ 31.462804] ? find_held_lock+0x2c/0x110 [ 31.463343] do_vmi_align_munmap+0x2ba/0x11f0 [ 31.463927] ? lock_is_held_type+0x9f/0x120 [ 31.464486] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 31.465119] ? mtree_range_walk+0x632/0x900 [ 31.465695] ? mas_walk+0x5c7/0x7c0 [ 31.466179] do_vmi_munmap+0x1f1/0x2b0 [ 31.466694] mmap_region+0x1f9/0x2660 [ 31.467184] ? vm_mmap_pgoff+0x15c/0x3a0 [ 31.467704] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 31.468441] ? __pfx_lock_acquire+0x10/0x10 [ 31.469009] ? __pfx_mmap_region+0x10/0x10 [ 31.469545] ? security_mmap_addr+0x7d/0xa0 [ 31.470096] ? get_unmapped_area+0x1f5/0x3f0 [ 31.470665] do_mmap+0x854/0xf00 [ 31.471126] vm_mmap_pgoff+0x1a6/0x3a0 [ 31.471659] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 31.472228] ksys_mmap_pgoff+0x3af/0x500 [ 31.472783] do_syscall_64+0x3f/0x90 [ 31.473272] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.473948] RIP: 0033:0x7f423a9a7d82 [ 31.474410] 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 [ 31.476589] RSP: 002b:00007ffc80244898 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 31.477531] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f423a9a7d82 [ 31.478423] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f4239de1000 [ 31.479294] RBP: 00007f4239de1000 R08: 0000000000000009 R09: 0000000000001000 [ 31.480171] R10: 0000000000000812 R11: 0000000000000206 R12: 00005646aba28d90 [ 31.481050] R13: 00007ffc802448b0 R14: 00007ffc802448e0 R15: 00007ffc80244c40 [ 31.481925] [ 31.482234] [ 31.482457] Allocated by task 213: [ 31.482885] kasan_save_stack+0x22/0x50 [ 31.483413] kasan_set_track+0x25/0x30 [ 31.483904] __kasan_slab_alloc+0x59/0x70 [ 31.484439] kmem_cache_alloc+0x16b/0x370 [ 31.484979] vm_area_dup+0x20/0x160 [ 31.485444] __split_vma+0x170/0x950 [ 31.485911] split_vma+0xc6/0x110 [ 31.486359] mprotect_fixup+0x8d2/0xb30 [ 31.486884] do_mprotect_pkey+0x87e/0xd40 [ 31.487407] __x64_sys_mprotect+0x78/0xc0 [ 31.487950] do_syscall_64+0x3f/0x90 [ 31.488453] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.489121] [ 31.489352] Freed by task 19: [ 31.489739] kasan_save_stack+0x22/0x50 [ 31.490254] kasan_set_track+0x25/0x30 [ 31.490779] kasan_save_free_info+0x2b/0x50 [ 31.491323] __kasan_slab_free+0x10a/0x190 [ 31.491860] kmem_cache_free+0x10d/0x4d0 [ 31.492374] rcu_core+0x8c8/0x2860 [ 31.492858] __do_softirq+0x1b7/0x7d4 [ 31.493338] [ 31.493553] Last potentially related work creation: [ 31.494230] kasan_save_stack+0x22/0x50 [ 31.494753] __kasan_record_aux_stack+0x8e/0xa0 [ 31.495340] __call_rcu_common.constprop.0+0x6a/0xb90 [ 31.495993] remove_vma+0x139/0x170 [ 31.496442] do_vmi_align_munmap+0xd4a/0x11f0 [ 31.497031] do_vmi_munmap+0x1f1/0x2b0 [ 31.497516] __vm_munmap+0x138/0x3a0 [ 31.497973] __x64_sys_munmap+0x59/0x80 [ 31.498465] do_syscall_64+0x3f/0x90 [ 31.498941] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.499580] [ 31.499799] The buggy address belongs to the object at ffff88801a358000 [ 31.499799] which belongs to the cache vm_area_struct of size 168 [ 31.501310] The buggy address is located 88 bytes inside of [ 31.501310] freed 168-byte region [ffff88801a358000, ffff88801a3580a8) [ 31.502749] [ 31.502968] The buggy address belongs to the physical page: [ 31.503678] page:0000000035c9b716 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x1a358 [ 31.504826] memcg:ffff88801033fe01 [ 31.505273] flags: 0x100000000000200(slab|node=0|zone=1) [ 31.505957] page_type: 0xffffffff() [ 31.506423] raw: 0100000000000200 ffff88800879fc80 dead000000000122 0000000000000000 [ 31.507379] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88801033fe01 [ 31.508311] page dumped because: kasan: bad access detected [ 31.509021] [ 31.509255] Memory state around the buggy address: [ 31.509855] ffff88801a357f00: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 31.510744] ffff88801a357f80: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 31.511626] >ffff88801a358000: fa fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 31.512513] ^ [ 31.513290] ffff88801a358080: fb fb fb fb fb fc fc fc fc fc fc fc fc fa fb fb [ 31.514175] ffff88801a358100: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 31.515057] ================================================================== [ 31.516017] Disabling lock debugging due to kernel taint [ 33.746635] BUG: Bad rss-counter state mm:00000000dac9c3ed type:MM_FILEPAGES val:33 [ 33.747827] BUG: Bad rss-counter state mm:00000000dac9c3ed type:MM_ANONPAGES val:22 [ 34.129187] BUG: Bad rss-counter state mm:000000002ad5282e type:MM_FILEPAGES val:33 [ 34.130240] BUG: Bad rss-counter state mm:000000002ad5282e type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:62046' (ECDSA) to the list of known hosts. 2023/06/19 13:08:02 fuzzer started 2023/06/19 13:08:02 dialing manager at localhost:44161 2023/06/19 13:08:02 checking machine... 2023/06/19 13:08:02 checking revisions... [ 34.856580] kmemleak: Automatic memory scanning thread ended 2023/06/19 13:08:03 testing simple program... [ 34.901210] cgroup: Unknown subsys name 'net' [ 34.941699] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 13:08:01 Registers: info registers vcpu 0 RAX=ffffffff818470dc RBX=ffffffff813ad420 RCX=0000000000000001 RDX=1ffff11001f6fed6 RSI=ffffffff818470dc RDI=ffff88800fb7f720 RBP=ffff88800fb7f6f0 RSP=ffff88800fb7f650 R8 =0000000000000001 R9 =ffff88800fb7f698 R10=0000000000038001 R11=0000000000020c48 R12=ffff88800fb7f720 R13=0000000000000000 R14=ffff88800f0a51c0 R15=0000000000092cc0 RIP=ffffffff813ad420 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 00007f81cba84900 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=00007ffd4863f000 CR3=000000001a3f8000 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=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 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=00007fa91fa4f610 CR3=000000000c6c8000 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=4510719394de24ab5f4049d231c79983 XMM02=2c67c8bc2e329bc3000000000011da70 XMM03=fb795ef6d65770560000000000124ba8 XMM04=e692fcce47055fd100000000000ae988 XMM05=e4cb8bb95a7664b60000000000134710 XMM06=c291bd5c70af25b90000000000134598 XMM07=e042d86d42eb936e0000000000124e28 XMM08=e96893bdd99d6665000000000011dad0 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000