syzkaller login: [ 31.396663] BUG: Bad rss-counter state mm:0000000079c681ed type:MM_FILEPAGES val:33 [ 31.397995] BUG: Bad rss-counter state mm:0000000079c681ed type:MM_ANONPAGES val:22 [ 31.436708] ================================================================== [ 31.437689] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 31.438655] Read of size 8 at addr ffff88801a143df0 by task sshd/221 [ 31.439424] [ 31.439643] CPU: 0 PID: 221 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 31.440519] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 31.441502] Call Trace: [ 31.441830] [ 31.442114] dump_stack_lvl+0x91/0xf0 [ 31.442613] print_report+0xcc/0x620 [ 31.443104] ? __virt_addr_valid+0x102/0x340 [ 31.443659] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.444280] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.444915] kasan_report+0xbe/0xf0 [ 31.445400] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.446026] vma_interval_tree_remove+0xc75/0xec0 [ 31.446652] vma_prepare+0xc54/0x11a0 [ 31.447131] __split_vma+0x5af/0x950 [ 31.447606] ? __pfx___split_vma+0x10/0x10 [ 31.448137] ? find_held_lock+0x2c/0x110 [ 31.448689] do_vmi_align_munmap+0x2ba/0x11f0 [ 31.449264] ? lock_is_held_type+0x9f/0x120 [ 31.449811] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 31.450405] ? mtree_range_walk+0x632/0x900 [ 31.450967] ? mas_walk+0x5c7/0x7c0 [ 31.451448] do_vmi_munmap+0x1f1/0x2b0 [ 31.451945] mmap_region+0x1f9/0x2660 [ 31.452432] ? vm_mmap_pgoff+0x15c/0x3a0 [ 31.452947] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 31.453688] ? __pfx_lock_acquire+0x10/0x10 [ 31.454221] ? __pfx_mmap_region+0x10/0x10 [ 31.454766] ? security_mmap_addr+0x7d/0xa0 [ 31.455309] ? get_unmapped_area+0x1f5/0x3f0 [ 31.455869] do_mmap+0x854/0xf00 [ 31.456311] vm_mmap_pgoff+0x1a6/0x3a0 [ 31.456809] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 31.457368] ksys_mmap_pgoff+0x3af/0x500 [ 31.457892] do_syscall_64+0x3f/0x90 [ 31.458391] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.459050] RIP: 0033:0x7f8b153a3d82 [ 31.459510] 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 [ 31.461748] RSP: 002b:00007fffb8444cb8 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 31.462689] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f8b153a3d82 [ 31.463546] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f8b147dd000 [ 31.464561] RBP: 00007f8b147dd000 R08: 0000000000000009 R09: 0000000000001000 [ 31.465426] R10: 0000000000000812 R11: 0000000000000206 R12: 00005618e4d08ec0 [ 31.466306] R13: 00007fffb8444cd0 R14: 00007fffb8444d00 R15: 00007fffb8445060 [ 31.467172] [ 31.467464] [ 31.467679] Allocated by task 214: [ 31.468113] kasan_save_stack+0x22/0x50 [ 31.468623] kasan_set_track+0x25/0x30 [ 31.469121] __kasan_slab_alloc+0x59/0x70 [ 31.469652] kmem_cache_alloc+0x16b/0x370 [ 31.470183] vm_area_dup+0x20/0x160 [ 31.470647] __split_vma+0x170/0x950 [ 31.471122] split_vma+0xc6/0x110 [ 31.471573] mprotect_fixup+0x8d2/0xb30 [ 31.472089] do_mprotect_pkey+0x87e/0xd40 [ 31.472615] __x64_sys_mprotect+0x78/0xc0 [ 31.473143] do_syscall_64+0x3f/0x90 [ 31.473618] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.474266] [ 31.474492] Freed by task 214: [ 31.474891] kasan_save_stack+0x22/0x50 [ 31.475397] kasan_set_track+0x25/0x30 [ 31.475893] kasan_save_free_info+0x2b/0x50 [ 31.476429] __kasan_slab_free+0x10a/0x190 [ 31.476964] kmem_cache_free+0x10d/0x4d0 [ 31.477474] rcu_core+0x8c8/0x2860 [ 31.477919] __do_softirq+0x1b7/0x7d4 [ 31.478413] [ 31.478634] Last potentially related work creation: [ 31.479226] kasan_save_stack+0x22/0x50 [ 31.479732] __kasan_record_aux_stack+0x8e/0xa0 [ 31.480314] __call_rcu_common.constprop.0+0x6a/0xb90 [ 31.480972] remove_vma+0x139/0x170 [ 31.481453] do_vmi_align_munmap+0xd4a/0x11f0 [ 31.482027] do_vmi_munmap+0x1f1/0x2b0 [ 31.482519] __vm_munmap+0x138/0x3a0 [ 31.483007] __x64_sys_munmap+0x59/0x80 [ 31.483508] do_syscall_64+0x3f/0x90 [ 31.483990] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.484643] [ 31.484859] The buggy address belongs to the object at ffff88801a143d98 [ 31.484859] which belongs to the cache vm_area_struct of size 168 [ 31.486389] The buggy address is located 88 bytes inside of [ 31.486389] freed 168-byte region [ffff88801a143d98, ffff88801a143e40) [ 31.487813] [ 31.488029] The buggy address belongs to the physical page: [ 31.488711] page:0000000015da7bf1 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x1a143 [ 31.489846] memcg:ffff88801810e601 [ 31.490303] flags: 0x100000000000200(slab|node=0|zone=1) [ 31.490954] page_type: 0xffffffff() [ 31.491409] raw: 0100000000000200 ffff8880087a0c80 dead000000000122 0000000000000000 [ 31.492343] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88801810e601 [ 31.493270] page dumped because: kasan: bad access detected [ 31.493943] [ 31.494159] Memory state around the buggy address: [ 31.494757] ffff88801a143c80: fc fc fc fc fc fc 00 00 00 00 00 00 00 00 00 00 [ 31.495625] ffff88801a143d00: 00 00 00 00 00 00 00 00 00 00 00 fc fc fc fc fc [ 31.496492] >ffff88801a143d80: fc fc fc fa fb fb fb fb fb fb fb fb fb fb fb fb [ 31.497359] ^ [ 31.498180] ffff88801a143e00: fb fb fb fb fb fb fb fb fc fc fc fc fc fc fc fc [ 31.499078] ffff88801a143e80: fa fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 31.499945] ================================================================== [ 31.501414] Disabling lock debugging due to kernel taint [ 33.586131] BUG: Bad rss-counter state mm:00000000c22d5ab4 type:MM_FILEPAGES val:33 [ 33.587360] BUG: Bad rss-counter state mm:00000000c22d5ab4 type:MM_ANONPAGES val:22 [ 34.060566] BUG: Bad rss-counter state mm:00000000bdff340d type:MM_FILEPAGES val:33 [ 34.061737] BUG: Bad rss-counter state mm:00000000bdff340d type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:48183' (ECDSA) to the list of known hosts. 2023/06/21 06:20:45 fuzzer started 2023/06/21 06:20:45 dialing manager at localhost:36067 2023/06/21 06:20:45 checking machine... 2023/06/21 06:20:45 checking revisions... [ 34.696834] kmemleak: Automatic memory scanning thread ended 2023/06/21 06:20:45 testing simple program... [ 34.747357] cgroup: Unknown subsys name 'net' [ 34.805896] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 06:20:45 Registers: info registers vcpu 0 RAX=0000000000000000 RBX=0000000000000001 RCX=ffffffff8180c704 RDX=dffffc0000000000 RSI=ffffffff8180c705 RDI=ffff888008d9f978 RBP=ffff888008d9f9d0 RSP=ffff888008d9f908 R8 =ffffffff86138e90 R9 =ffff888008d9f9b8 R10=0000000000038001 R11=0000000000020d8f R12=ffff888008d9f9d8 R13=ffff888008d9f9c0 R14=ffff888008d9f9b9 R15=ffff888008d9f978 RIP=ffffffff81130719 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 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=00007f2d272564f0 CR3=000000000c5b4000 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=7f8a422febb412b15b43fb8d202903b9 XMM02=000000000011b198ec2efd57dc4c00df XMM03=0000000000122710351ffba0d9dbad6c XMM04=28b7c39fafabc46f00000000000ae988 XMM05=e4cb8bb95a7664b600000000001324f0 XMM06=5ae6633f191a36d10000000000131358 XMM07=e042d86d42eb936e0000000000122990 XMM08=351ffba0d9dbad6c000000000011b1f8 XMM09=00000000000000000000000000000000 XMM10=20200000000020202020202020200000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=ffffffff846000aa RBX=ffffffff813ad470 RCX=0000000000000001 RDX=1ffff110028c6f24 RSI=ffffffff846000aa RDI=ffff888014637990 RBP=ffff888014637960 RSP=ffff8880146378c0 R8 =0000000000000001 R9 =ffff888014637908 R10=0000000000038001 R11=00000000000b5080 R12=ffff888014637990 R13=0000000000000000 R14=ffff88801001b680 R15=ffff8880191a0d18 RIP=ffffffff813ad474 RFL=00000286 [--S--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 00007f61df105900 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=00007fff0e60a000 CR3=000000000e71e000 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