syzkaller login: [ 33.074638] BUG: Bad rss-counter state mm:0000000065464be1 type:MM_FILEPAGES val:32 [ 33.075891] BUG: Bad rss-counter state mm:0000000065464be1 type:MM_ANONPAGES val:22 [ 33.113560] ================================================================== [ 33.114640] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 33.115749] Read of size 8 at addr ffff888017858b38 by task sshd/220 [ 33.116618] [ 33.116863] CPU: 1 PID: 220 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 33.117870] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 33.119073] Call Trace: [ 33.119404] [ 33.119697] dump_stack_lvl+0x91/0xf0 [ 33.120254] print_report+0xcc/0x620 [ 33.120856] ? __virt_addr_valid+0x102/0x340 [ 33.121433] ? vma_interval_tree_remove+0xc75/0xec0 [ 33.122214] ? vma_interval_tree_remove+0xc75/0xec0 [ 33.122840] kasan_report+0xbe/0xf0 [ 33.123326] ? vma_interval_tree_remove+0xc75/0xec0 [ 33.123949] vma_interval_tree_remove+0xc75/0xec0 [ 33.124546] vma_prepare+0xc54/0x11a0 [ 33.125046] __split_vma+0x5af/0x950 [ 33.125531] ? __pfx___split_vma+0x10/0x10 [ 33.126067] ? find_held_lock+0x2c/0x110 [ 33.126614] do_vmi_align_munmap+0x2ba/0x11f0 [ 33.127193] ? lock_is_held_type+0x9f/0x120 [ 33.127745] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 33.128359] ? mtree_range_walk+0x632/0x900 [ 33.128918] ? mas_walk+0x5c7/0x7c0 [ 33.129408] do_vmi_munmap+0x1f1/0x2b0 [ 33.129913] mmap_region+0x1f9/0x2660 [ 33.130408] ? vm_mmap_pgoff+0x15c/0x3a0 [ 33.130925] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 33.131650] ? __pfx_lock_acquire+0x10/0x10 [ 33.132188] ? __pfx_mmap_region+0x10/0x10 [ 33.132718] ? security_mmap_addr+0x7d/0xa0 [ 33.133271] ? get_unmapped_area+0x1f5/0x3f0 [ 33.133828] do_mmap+0x854/0xf00 [ 33.134267] vm_mmap_pgoff+0x1a6/0x3a0 [ 33.134767] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 33.135333] ksys_mmap_pgoff+0x3af/0x500 [ 33.135843] do_syscall_64+0x3f/0x90 [ 33.136319] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 33.136969] RIP: 0033:0x7f68fb1b5d82 [ 33.137435] 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 [ 33.139567] RSP: 002b:00007fffbe7c3ea8 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 33.140470] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f68fb1b5d82 [ 33.141340] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f68fa5ef000 [ 33.142194] RBP: 00007f68fa5ef000 R08: 0000000000000009 R09: 0000000000001000 [ 33.143037] R10: 0000000000000812 R11: 0000000000000206 R12: 0000562636891ec0 [ 33.143887] R13: 00007fffbe7c3ec0 R14: 00007fffbe7c3ef0 R15: 00007fffbe7c4250 [ 33.144756] [ 33.145048] [ 33.145267] Allocated by task 213: [ 33.145693] kasan_save_stack+0x22/0x50 [ 33.146204] kasan_set_track+0x25/0x30 [ 33.146692] __kasan_slab_alloc+0x59/0x70 [ 33.147215] kmem_cache_alloc+0x16b/0x370 [ 33.147738] vm_area_dup+0x20/0x160 [ 33.148194] __split_vma+0x170/0x950 [ 33.148655] split_vma+0xc6/0x110 [ 33.149095] mprotect_fixup+0x8d2/0xb30 [ 33.149619] do_mprotect_pkey+0x87e/0xd40 [ 33.150142] __x64_sys_mprotect+0x78/0xc0 [ 33.150664] do_syscall_64+0x3f/0x90 [ 33.151138] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 33.151780] [ 33.151996] Freed by task 213: [ 33.152389] kasan_save_stack+0x22/0x50 [ 33.152893] kasan_set_track+0x25/0x30 [ 33.153393] kasan_save_free_info+0x2b/0x50 [ 33.153926] __kasan_slab_free+0x10a/0x190 [ 33.154467] kmem_cache_free+0x10d/0x4d0 [ 33.154981] rcu_core+0x8c8/0x2860 [ 33.155426] __do_softirq+0x1b7/0x7d4 [ 33.155902] [ 33.156118] Last potentially related work creation: [ 33.156719] kasan_save_stack+0x22/0x50 [ 33.157232] __kasan_record_aux_stack+0x8e/0xa0 [ 33.157809] __call_rcu_common.constprop.0+0x6a/0xb90 [ 33.158451] remove_vma+0x139/0x170 [ 33.158899] do_vmi_align_munmap+0xd4a/0x11f0 [ 33.159504] do_vmi_munmap+0x1f1/0x2b0 [ 33.160004] __vm_munmap+0x138/0x3a0 [ 33.160478] __x64_sys_munmap+0x59/0x80 [ 33.160982] do_syscall_64+0x3f/0x90 [ 33.161461] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 33.162107] [ 33.162319] The buggy address belongs to the object at ffff888017858ae0 [ 33.162319] which belongs to the cache vm_area_struct of size 168 [ 33.163794] The buggy address is located 88 bytes inside of [ 33.163794] freed 168-byte region [ffff888017858ae0, ffff888017858b88) [ 33.165207] [ 33.165423] The buggy address belongs to the physical page: [ 33.166084] page:00000000cdcd5c67 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x17858 [ 33.167180] memcg:ffff8880178e0201 [ 33.167606] flags: 0x100000000000200(slab|node=0|zone=1) [ 33.168254] page_type: 0xffffffff() [ 33.168703] raw: 0100000000000200 ffff88800879fc80 ffffea0000316d40 dead000000000002 [ 33.169643] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff8880178e0201 [ 33.170552] page dumped because: kasan: bad access detected [ 33.171214] [ 33.171435] Memory state around the buggy address: [ 33.172019] ffff888017858a00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 33.172872] ffff888017858a80: fb fb fb fb fc fc fc fc fc fc fc fc fa fb fb fb [ 33.173739] >ffff888017858b00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 33.174596] ^ [ 33.175207] ffff888017858b80: fb fc fc fc fc fc fc fc fc 00 00 00 00 00 00 00 [ 33.176070] ffff888017858c00: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 fc fc [ 33.176930] ================================================================== [ 33.177964] Disabling lock debugging due to kernel taint [ 35.129054] BUG: Bad rss-counter state mm:000000009f0e70f6 type:MM_FILEPAGES val:32 [ 35.130103] BUG: Bad rss-counter state mm:000000009f0e70f6 type:MM_ANONPAGES val:22 [ 35.645929] BUG: Bad rss-counter state mm:00000000f2c99dff type:MM_FILEPAGES val:33 [ 35.647114] BUG: Bad rss-counter state mm:00000000f2c99dff type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:43189' (ECDSA) to the list of known hosts. 2023/06/19 12:13:32 fuzzer started 2023/06/19 12:13:32 dialing manager at localhost:44161 2023/06/19 12:13:32 checking machine... 2023/06/19 12:13:32 checking revisions... [ 36.307833] kmemleak: Automatic memory scanning thread ended 2023/06/19 12:13:32 testing simple program... [ 36.356392] cgroup: Unknown subsys name 'net' [ 36.413242] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 12:13:29 Registers: info registers vcpu 0 RAX=0000000000000001 RBX=ffff8880143d7750 RCX=ffffffff812e0423 RDX=0000000000000000 RSI=0000000000000004 RDI=ffff888016531520 RBP=0000000000000000 RSP=ffff8880143d7610 R8 =0000000000000000 R9 =ffffed1002ca62a4 R10=ffff888016531523 R11=0000000000000001 R12=0000000000000002 R13=ffff8880143d7758 R14=ffff8880143d7788 R15=ffff8880143d7750 RIP=ffffffff8189309f 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 00007ff08e4fd900 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=00007ff08da1e000 CR3=000000000c5ba000 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=756f6a2f646d65747379732f6e75722f XMM01=00676f6c7379732f6c616e72756f6a2f XMM02=756f6a2f646d65747379732f6e75722f XMM03=006c616e72756f6a2f646d6574737973 XMM04=2d508950c9fa063800000000000ae988 XMM05=d8c2faeb45192e750000000000135dc8 XMM06=4fda316b135da52b0000000000134af8 XMM07=fb795ef6d657705600000000001253d8 XMM08=4f5453444600273d67736d000d0a0920 XMM09=00000000000000000000000000000000 XMM10=20200000000020202020202020200000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=dffffc0000000000 RBX=ffffffff8363de43 RCX=0000000000000001 RDX=1ffff11002832f4b RSI=ffff888014197ef0 RDI=ffffffff8363de43 RBP=ffffffff8363de43 RSP=ffff8880141979b0 R8 =0000000000000001 R9 =ffff888014197a40 R10=0000000000038001 R11=000000000008a96b R12=0000000000000001 R13=0000000000000000 R14=ffff888016169b40 R15=ffff88800f1ab720 RIP=ffffffff811fc772 RFL=00000283 [--S---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 00007ff9ed4ce900 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=00007ff9eda85618 CR3=00000000171d8000 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=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