syzkaller login: [ 135.043818] BUG: Bad rss-counter state mm:00000000b0a89efc type:MM_FILEPAGES val:33 [ 135.045810] BUG: Bad rss-counter state mm:00000000b0a89efc type:MM_ANONPAGES val:22 [ 135.211784] ================================================================== [ 135.212884] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 135.214008] Read of size 8 at addr ffff88801a39eed8 by task sshd/220 [ 135.215007] [ 135.215230] CPU: 0 PID: 220 Comm: sshd Tainted: G L 6.4.0-rc7-next-20230619 #1 [ 135.216271] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 135.217260] Call Trace: [ 135.217578] [ 135.217866] dump_stack_lvl+0x91/0xf0 [ 135.218362] print_report+0xcc/0x620 [ 135.218856] ? __virt_addr_valid+0x102/0x340 [ 135.219421] ? vma_interval_tree_remove+0xc75/0xec0 [ 135.220042] ? vma_interval_tree_remove+0xc75/0xec0 [ 135.220661] kasan_report+0xbe/0xf0 [ 135.221143] ? vma_interval_tree_remove+0xc75/0xec0 [ 135.221764] vma_interval_tree_remove+0xc75/0xec0 [ 135.222376] vma_prepare+0xc54/0x11a0 [ 135.222876] __split_vma+0x5af/0x950 [ 135.223354] ? __pfx___split_vma+0x10/0x10 [ 135.223891] ? find_held_lock+0x2c/0x110 [ 135.224411] do_vmi_align_munmap+0x2ba/0x11f0 [ 135.224989] ? lock_is_held_type+0x9f/0x120 [ 135.225528] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 135.226142] ? mtree_range_walk+0x632/0x900 [ 135.226710] ? mas_walk+0x5c7/0x7c0 [ 135.227186] do_vmi_munmap+0x1f1/0x2b0 [ 135.227683] mmap_region+0x1f9/0x2660 [ 135.228175] ? vm_mmap_pgoff+0x15c/0x3a0 [ 135.228690] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 135.229404] ? __pfx_lock_acquire+0x10/0x10 [ 135.229936] ? __pfx_mmap_region+0x10/0x10 [ 135.230474] ? security_mmap_addr+0x7d/0xa0 [ 135.231024] ? get_unmapped_area+0x1f5/0x3f0 [ 135.231572] do_mmap+0x854/0xf00 [ 135.232019] vm_mmap_pgoff+0x1a6/0x3a0 [ 135.232512] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 135.233074] ksys_mmap_pgoff+0x3af/0x500 [ 135.233584] do_syscall_64+0x3f/0x90 [ 135.234060] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 135.234715] RIP: 0033:0x7f5e4e579d82 [ 135.235170] 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 [ 135.237309] RSP: 002b:00007ffe394ad478 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 135.238213] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f5e4e579d82 [ 135.239101] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f5e4d9b3000 [ 135.239950] RBP: 00007f5e4d9b3000 R08: 0000000000000009 R09: 0000000000001000 [ 135.240815] R10: 0000000000000812 R11: 0000000000000206 R12: 0000562997714f70 [ 135.241660] R13: 00007ffe394ad490 R14: 00007ffe394ad4c0 R15: 00007ffe394ad820 [ 135.242517] [ 135.242820] [ 135.243034] Allocated by task 213: [ 135.243461] kasan_save_stack+0x22/0x50 [ 135.243969] kasan_set_track+0x25/0x30 [ 135.244468] __kasan_slab_alloc+0x59/0x70 [ 135.245007] kmem_cache_alloc+0x16b/0x370 [ 135.245547] vm_area_dup+0x20/0x160 [ 135.246022] __split_vma+0x170/0x950 [ 135.246504] split_vma+0xc6/0x110 [ 135.246981] mprotect_fixup+0x8d2/0xb30 [ 135.247501] do_mprotect_pkey+0x87e/0xd40 [ 135.248049] __x64_sys_mprotect+0x78/0xc0 [ 135.248593] do_syscall_64+0x3f/0x90 [ 135.249086] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 135.249752] [ 135.249974] Freed by task 213: [ 135.250379] kasan_save_stack+0x22/0x50 [ 135.250915] kasan_set_track+0x25/0x30 [ 135.251435] kasan_save_free_info+0x2b/0x50 [ 135.251995] __kasan_slab_free+0x10a/0x190 [ 135.252545] kmem_cache_free+0x10d/0x4d0 [ 135.253070] rcu_core+0x8c8/0x2860 [ 135.253539] __do_softirq+0x1b7/0x7d4 [ 135.254031] [ 135.254250] Last potentially related work creation: [ 135.254880] kasan_save_stack+0x22/0x50 [ 135.255399] __kasan_record_aux_stack+0x8e/0xa0 [ 135.255996] __call_rcu_common.constprop.0+0x6a/0xb90 [ 135.256665] remove_vma+0x139/0x170 [ 135.257139] do_vmi_align_munmap+0xd4a/0x11f0 [ 135.257720] do_vmi_munmap+0x1f1/0x2b0 [ 135.258225] __vm_munmap+0x138/0x3a0 [ 135.258743] __x64_sys_munmap+0x59/0x80 [ 135.259261] do_syscall_64+0x3f/0x90 [ 135.259753] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 135.260428] [ 135.260650] The buggy address belongs to the object at ffff88801a39ee80 [ 135.260650] which belongs to the cache vm_area_struct of size 168 [ 135.262181] The buggy address is located 88 bytes inside of [ 135.262181] freed 168-byte region [ffff88801a39ee80, ffff88801a39ef28) [ 135.263681] [ 135.263905] The buggy address belongs to the physical page: [ 135.264594] page:0000000034ebb66d refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x1a39e [ 135.265734] memcg:ffff888018e86901 [ 135.266175] flags: 0x100000000000200(slab|node=0|zone=1) [ 135.266876] page_type: 0xffffffff() [ 135.267346] raw: 0100000000000200 ffff88800879fc80 dead000000000122 0000000000000000 [ 135.268318] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff888018e86901 [ 135.269269] page dumped because: kasan: bad access detected [ 135.269966] [ 135.270187] Memory state around the buggy address: [ 135.270805] ffff88801a39ed80: fc fc fc 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 135.271681] ffff88801a39ee00: 00 00 00 00 00 00 00 00 fc fc fc fc fc fc fc fc [ 135.272590] >ffff88801a39ee80: fa fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 135.273482] ^ [ 135.274242] ffff88801a39ef00: fb fb fb fb fb fc fc fc fc fc fc fc fc fc fc fc [ 135.275149] ffff88801a39ef80: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc [ 135.276043] ================================================================== [ 135.277087] Disabling lock debugging due to kernel taint [ 137.213748] BUG: Bad rss-counter state mm:00000000a68e381c type:MM_FILEPAGES val:33 [ 137.214710] BUG: Bad rss-counter state mm:00000000a68e381c type:MM_ANONPAGES val:22 [ 137.689614] BUG: Bad rss-counter state mm:00000000f423097b type:MM_FILEPAGES val:33 [ 137.690834] BUG: Bad rss-counter state mm:00000000f423097b type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:38925' (ECDSA) to the list of known hosts. 2023/06/20 01:15:27 fuzzer started 2023/06/20 01:15:28 dialing manager at localhost:44161 2023/06/20 01:15:28 checking machine... 2023/06/20 01:15:28 checking revisions... [ 138.501813] kmemleak: Automatic memory scanning thread ended 2023/06/20 01:15:28 testing simple program... [ 138.557798] cgroup: Unknown subsys name 'net' [ 138.608132] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 01:13:43 Registers: info registers vcpu 0 RAX=ffff888014798001 RBX=0000000000000001 RCX=0000000000000001 RDX=ffff888014797a01 RSI=ffff888014797a48 RDI=ffff88806ce09aa8 RBP=ffff888014797a48 RSP=ffff88806ce09a00 R8 =0000000000000001 R9 =ffff88806ce09ad8 R10=0000000000038001 R11=0000000000026e64 R12=0000000000000008 R13=ffff888014790000 R14=ffff888014797a48 R15=ffff88806ce09a98 RIP=ffffffff811304ce 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 =0000 0000000000000000 00000000 00000000 DS =0000 0000000000000000 00000000 00000000 FS =0000 00007fa59d4ff900 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=00007fa59ca32040 CR3=000000000d938000 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=b3285ca56c489dff000000000011f7a8 XMM01=d59e07bde36eea69000000000012f978 XMM02=ec2efd57dc4c00df000000000012fa80 XMM03=c5388b50b29397aa000000000012fb50 XMM04=d6f78b97a3ba8d7c00000000000ae988 XMM05=19e9129bd510f23500000000001469f8 XMM06=261b4cee76e42f770000000000145860 XMM07=e042d86d42eb936e0000000000137218 XMM08=c5388b50b29397aa000000000012fb50 XMM09=00000000000000000000000000000000 XMM10=20200000000020202020202020200000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=ffffffff81802eb3 RBX=0000000000000001 RCX=0000000000000001 RDX=ffff8880165ef901 RSI=ffff8880165ef970 RDI=ffff8880165ef970 RBP=ffff8880165ef600 RSP=ffff8880165ef530 R8 =ffffffff861371f4 R9 =ffff8880165ef5e8 R10=0000000000038001 R11=0000000000020d06 R12=ffff8880165ef608 R13=ffff8880165ef5f0 R14=ffff8880165ef978 R15=ffff8880165ef5a8 RIP=ffffffff8112fbf3 RFL=00000202 [-------] 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 00007f34bc163900 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=00007ffda7417000 CR3=0000000006a46000 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