syzkaller login: [ 31.165304] BUG: Bad rss-counter state mm:00000000ad2a67c4 type:MM_FILEPAGES val:33 [ 31.166707] BUG: Bad rss-counter state mm:00000000ad2a67c4 type:MM_ANONPAGES val:22 [ 31.329128] ================================================================== [ 31.330046] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 31.330971] Read of size 8 at addr ffff88800dabc140 by task sshd/220 [ 31.331728] [ 31.331947] CPU: 0 PID: 220 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 31.332890] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 31.333854] Call Trace: [ 31.334185] [ 31.334476] dump_stack_lvl+0x91/0xf0 [ 31.334968] print_report+0xcc/0x620 [ 31.335446] ? __virt_addr_valid+0x102/0x340 [ 31.335997] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.336634] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.337314] kasan_report+0xbe/0xf0 [ 31.337788] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.338433] vma_interval_tree_remove+0xc75/0xec0 [ 31.339079] vma_prepare+0xc54/0x11a0 [ 31.339558] __split_vma+0x5af/0x950 [ 31.340033] ? __pfx___split_vma+0x10/0x10 [ 31.340562] ? find_held_lock+0x2c/0x110 [ 31.341086] do_vmi_align_munmap+0x2ba/0x11f0 [ 31.341656] ? lock_is_held_type+0x9f/0x120 [ 31.342205] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 31.342809] ? mtree_range_walk+0x632/0x900 [ 31.343362] ? mas_walk+0x5c7/0x7c0 [ 31.343836] do_vmi_munmap+0x1f1/0x2b0 [ 31.344327] mmap_region+0x1f9/0x2660 [ 31.344807] ? vm_mmap_pgoff+0x15c/0x3a0 [ 31.345320] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 31.346059] ? __pfx_lock_acquire+0x10/0x10 [ 31.346601] ? __pfx_mmap_region+0x10/0x10 [ 31.347137] ? security_mmap_addr+0x7d/0xa0 [ 31.347677] ? get_unmapped_area+0x1f5/0x3f0 [ 31.348224] do_mmap+0x854/0xf00 [ 31.348659] vm_mmap_pgoff+0x1a6/0x3a0 [ 31.349154] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 31.349721] ksys_mmap_pgoff+0x3af/0x500 [ 31.350233] do_syscall_64+0x3f/0x90 [ 31.350715] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.351367] RIP: 0033:0x7f25d5af0d82 [ 31.351819] 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 [ 31.353960] RSP: 002b:00007ffccf8865d8 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 31.354900] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f25d5af0d82 [ 31.355749] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f25d4f2a000 [ 31.356593] RBP: 00007f25d4f2a000 R08: 0000000000000009 R09: 0000000000001000 [ 31.357453] R10: 0000000000000812 R11: 0000000000000206 R12: 0000558ae4c9ad90 [ 31.358324] R13: 00007ffccf8865f0 R14: 00007ffccf886620 R15: 00007ffccf886980 [ 31.359195] [ 31.359499] [ 31.359714] Allocated by task 213: [ 31.360142] kasan_save_stack+0x22/0x50 [ 31.360641] kasan_set_track+0x25/0x30 [ 31.361136] __kasan_slab_alloc+0x59/0x70 [ 31.361657] kmem_cache_alloc+0x16b/0x370 [ 31.362217] vm_area_dup+0x20/0x160 [ 31.362677] __split_vma+0x170/0x950 [ 31.363140] split_vma+0xc6/0x110 [ 31.363586] mprotect_fixup+0x8d2/0xb30 [ 31.364087] do_mprotect_pkey+0x87e/0xd40 [ 31.364608] __x64_sys_mprotect+0x78/0xc0 [ 31.365135] do_syscall_64+0x3f/0x90 [ 31.365606] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.366279] [ 31.366493] Freed by task 203: [ 31.366889] kasan_save_stack+0x22/0x50 [ 31.367392] kasan_set_track+0x25/0x30 [ 31.367887] kasan_save_free_info+0x2b/0x50 [ 31.368421] __kasan_slab_free+0x10a/0x190 [ 31.368958] kmem_cache_free+0x10d/0x4d0 [ 31.369466] rcu_core+0x8c8/0x2860 [ 31.369907] __do_softirq+0x1b7/0x7d4 [ 31.370399] [ 31.370619] Last potentially related work creation: [ 31.371213] kasan_save_stack+0x22/0x50 [ 31.371726] __kasan_record_aux_stack+0x8e/0xa0 [ 31.372305] __call_rcu_common.constprop.0+0x6a/0xb90 [ 31.372955] remove_vma+0x139/0x170 [ 31.373409] do_vmi_align_munmap+0xd4a/0x11f0 [ 31.373972] do_vmi_munmap+0x1f1/0x2b0 [ 31.374487] __vm_munmap+0x138/0x3a0 [ 31.374959] __x64_sys_munmap+0x59/0x80 [ 31.375477] do_syscall_64+0x3f/0x90 [ 31.375969] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.376611] [ 31.376824] The buggy address belongs to the object at ffff88800dabc0e8 [ 31.376824] which belongs to the cache vm_area_struct of size 168 [ 31.378294] The buggy address is located 88 bytes inside of [ 31.378294] freed 168-byte region [ffff88800dabc0e8, ffff88800dabc190) [ 31.379687] [ 31.379900] The buggy address belongs to the physical page: [ 31.380553] page:000000009af86130 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xdabc [ 31.381628] memcg:ffff8880167f8901 [ 31.382070] flags: 0x100000000000200(slab|node=0|zone=1) [ 31.382708] page_type: 0xffffffff() [ 31.383157] raw: 0100000000000200 ffff8880087a0c80 dead000000000122 0000000000000000 [ 31.384070] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff8880167f8901 [ 31.384972] page dumped because: kasan: bad access detected [ 31.385627] [ 31.385840] Memory state around the buggy address: [ 31.386434] ffff88800dabc000: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 31.387279] ffff88800dabc080: 00 00 00 00 00 fc fc fc fc fc fc fc fc fa fb fb [ 31.388196] >ffff88800dabc100: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 31.389047] ^ [ 31.389687] ffff88800dabc180: fb fb fc fc fc fc fc fc fc fc fa fb fb fb fb fb [ 31.390559] ffff88800dabc200: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fc [ 31.391413] ================================================================== [ 31.392695] Disabling lock debugging due to kernel taint [ 33.288524] BUG: Bad rss-counter state mm:0000000013fc75a2 type:MM_FILEPAGES val:33 [ 33.289297] BUG: Bad rss-counter state mm:0000000013fc75a2 type:MM_ANONPAGES val:22 [ 33.688705] BUG: Bad rss-counter state mm:000000005f9e2ed0 type:MM_FILEPAGES val:33 [ 33.689427] BUG: Bad rss-counter state mm:000000005f9e2ed0 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:50207' (ECDSA) to the list of known hosts. 2023/06/21 06:33:29 fuzzer started 2023/06/21 06:33:29 dialing manager at localhost:36067 2023/06/21 06:33:29 checking machine... 2023/06/21 06:33:29 checking revisions... [ 34.366483] kmemleak: Automatic memory scanning thread ended 2023/06/21 06:33:29 testing simple program... [ 34.421132] cgroup: Unknown subsys name 'net' [ 34.473834] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 06:33:29 Registers: info registers vcpu 0 RAX=0000000000000000 RBX=ffff888019b31d80 RCX=0000000000000001 RDX=0000000000000478 RSI=0000000000000000 RDI=ffff888019b32140 RBP=ffff888008fae500 RSP=ffff88800f0a7bc8 R8 =ffff888008fae500 R9 =0000000000000000 R10=ffff888019b31d80 R11=00000000000b6a61 R12=ffff888019b31cc0 R13=ffff888019b31700 R14=0000000000000003 R15=00000000ffffffff RIP=ffffffff84513422 RFL=00000203 [------C] 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 00007fc9d812d900 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=00007fc9d86e4618 CR3=0000000009d86000 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=6e69676f6c5f6d61702c78756e696c65 XMM02=755f6d61702c74696d7265705f6d6170 XMM03=2c766e655f6d61702c7374696d696c5f XMM04=6d61702c766e655f6d61702c7374696d XMM05=78696e755f6d61702c74696d7265705f XMM06=6469756e69676f6c5f6d61702c78756e XMM07=672065736f6c635f6e6f69737365733a XMM08=61662029286e65706f5f746964756100 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=0000000000008202 RBX=00000000cea56fe6 RCX=ffffffff849f3988 RDX=ffff88800f45d1c0 RSI=1ffffffff093e731 RDI=0000000000000000 RBP=000000007e2f0cb0 RSP=ffff8880147e7540 R8 =0000000000000006 R9 =000000002f3c5b27 R10=000000003f4f0a49 R11=0000000000000000 R12=dffffc0000000000 R13=ffffffff849f2d80 R14=0000000000000007 R15=ffff88800d41b73c RIP=ffffffff8219d4a5 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 =0000 0000000000000000 00000000 00000000 DS =0000 0000000000000000 00000000 00000000 FS =0000 00007fd33354e900 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=00007fd3329c0a70 CR3=000000000c73e000 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=454d49544c4145525f454352554f535f XMM01=3d504d415453454d49545f454d49544c XMM02=ffffffffffffffffffffffffffffffff XMM03=2f6c616e72756f6a2f676f6c2f6e7572 XMM04=0f9eaa933f86d7f100000000000ae988 XMM05=cd466928fd0a243900000000001323a0 XMM06=4fda316b135da52b0000000000131440 XMM07=00000000000000000000000000000000 XMM08=415453454d49545f454d49544c414552 XMM09=00000000000000000000000000000000 XMM10=20200000000020202020202020200000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000