syzkaller login: [ 54.010055] BUG: Bad rss-counter state mm:000000009fb7c77c type:MM_FILEPAGES val:33 [ 54.012009] BUG: Bad rss-counter state mm:000000009fb7c77c type:MM_ANONPAGES val:22 [ 54.163439] ================================================================== [ 54.164498] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 54.165596] Read of size 8 at addr ffff88800da40ed8 by task sshd/219 [ 54.166726] [ 54.166985] CPU: 1 PID: 219 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 54.167992] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 54.169136] Call Trace: [ 54.169513] [ 54.169845] dump_stack_lvl+0x91/0xf0 [ 54.170440] print_report+0xcc/0x620 [ 54.170917] ? __virt_addr_valid+0x102/0x340 [ 54.171464] ? vma_interval_tree_remove+0xc75/0xec0 [ 54.172078] ? vma_interval_tree_remove+0xc75/0xec0 [ 54.172692] kasan_report+0xbe/0xf0 [ 54.173168] ? vma_interval_tree_remove+0xc75/0xec0 [ 54.173789] vma_interval_tree_remove+0xc75/0xec0 [ 54.174407] vma_prepare+0xc54/0x11a0 [ 54.174892] __split_vma+0x5af/0x950 [ 54.175368] ? __pfx___split_vma+0x10/0x10 [ 54.175928] ? find_held_lock+0x2c/0x110 [ 54.176454] do_vmi_align_munmap+0x2ba/0x11f0 [ 54.177063] ? lock_is_held_type+0x9f/0x120 [ 54.177677] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 54.178321] ? mtree_range_walk+0x632/0x900 [ 54.178871] ? mas_walk+0x5c7/0x7c0 [ 54.179345] do_vmi_munmap+0x1f1/0x2b0 [ 54.179841] mmap_region+0x1f9/0x2660 [ 54.180330] ? vm_mmap_pgoff+0x15c/0x3a0 [ 54.180841] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 54.181562] ? __pfx_lock_acquire+0x10/0x10 [ 54.182108] ? __pfx_mmap_region+0x10/0x10 [ 54.182647] ? security_mmap_addr+0x7d/0xa0 [ 54.183186] ? get_unmapped_area+0x1f5/0x3f0 [ 54.183754] do_mmap+0x854/0xf00 [ 54.184198] vm_mmap_pgoff+0x1a6/0x3a0 [ 54.184694] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 54.185266] ksys_mmap_pgoff+0x3af/0x500 [ 54.185773] do_syscall_64+0x3f/0x90 [ 54.186264] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 54.186906] RIP: 0033:0x7f8ac82f7d82 [ 54.187362] 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 [ 54.189483] RSP: 002b:00007ffc4dbbf308 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 54.190409] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f8ac82f7d82 [ 54.191267] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f8ac7731000 [ 54.192107] RBP: 00007f8ac7731000 R08: 0000000000000009 R09: 0000000000001000 [ 54.192959] R10: 0000000000000812 R11: 0000000000000206 R12: 000055a791c8bf70 [ 54.193801] R13: 00007ffc4dbbf320 R14: 00007ffc4dbbf350 R15: 00007ffc4dbbf6b0 [ 54.194675] [ 54.194973] [ 54.195185] Allocated by task 212: [ 54.195613] kasan_save_stack+0x22/0x50 [ 54.196126] kasan_set_track+0x25/0x30 [ 54.196625] __kasan_slab_alloc+0x59/0x70 [ 54.197151] kmem_cache_alloc+0x16b/0x370 [ 54.197662] vm_area_dup+0x20/0x160 [ 54.198119] __split_vma+0x170/0x950 [ 54.198585] split_vma+0xc6/0x110 [ 54.199022] mprotect_fixup+0x8d2/0xb30 [ 54.199525] do_mprotect_pkey+0x87e/0xd40 [ 54.200044] __x64_sys_mprotect+0x78/0xc0 [ 54.200568] do_syscall_64+0x3f/0x90 [ 54.201038] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 54.201679] [ 54.201892] Freed by task 212: [ 54.202305] kasan_save_stack+0x22/0x50 [ 54.202803] kasan_set_track+0x25/0x30 [ 54.203293] kasan_save_free_info+0x2b/0x50 [ 54.203831] __kasan_slab_free+0x10a/0x190 [ 54.204361] kmem_cache_free+0x10d/0x4d0 [ 54.204862] rcu_core+0x8c8/0x2860 [ 54.205302] __do_softirq+0x1b7/0x7d4 [ 54.205771] [ 54.205993] Last potentially related work creation: [ 54.206581] kasan_save_stack+0x22/0x50 [ 54.207118] __kasan_record_aux_stack+0x8e/0xa0 [ 54.207802] __call_rcu_common.constprop.0+0x6a/0xb90 [ 54.208481] remove_vma+0x139/0x170 [ 54.208963] do_vmi_align_munmap+0xd4a/0x11f0 [ 54.209560] do_vmi_munmap+0x1f1/0x2b0 [ 54.210095] __vm_munmap+0x138/0x3a0 [ 54.210591] __x64_sys_munmap+0x59/0x80 [ 54.211121] do_syscall_64+0x3f/0x90 [ 54.211619] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 54.212309] [ 54.212532] The buggy address belongs to the object at ffff88800da40e80 [ 54.212532] which belongs to the cache vm_area_struct of size 168 [ 54.214074] The buggy address is located 88 bytes inside of [ 54.214074] freed 168-byte region [ffff88800da40e80, ffff88800da40f28) [ 54.215477] [ 54.215695] The buggy address belongs to the physical page: [ 54.216350] page:00000000ca0bafeb refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xda40 [ 54.217427] memcg:ffff88800dc75901 [ 54.217854] flags: 0x100000000000200(slab|node=0|zone=1) [ 54.218500] page_type: 0xffffffff() [ 54.218949] raw: 0100000000000200 ffff88800879fc80 ffffea0000380640 dead000000000002 [ 54.219858] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800dc75901 [ 54.220760] page dumped because: kasan: bad access detected [ 54.221416] [ 54.221628] Memory state around the buggy address: [ 54.222217] ffff88800da40d80: fc fc fc fa fb fb fb fb fb fb fb fb fb fb fb fb [ 54.223072] ffff88800da40e00: fb fb fb fb fb fb fb fb fc fc fc fc fc fc fc fc [ 54.223915] >ffff88800da40e80: fa fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 54.224760] ^ [ 54.225475] ffff88800da40f00: fb fb fb fb fb fc fc fc fc fc fc fc fc fc fc fc [ 54.226339] ffff88800da40f80: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc [ 54.227189] ================================================================== [ 54.228218] Disabling lock debugging due to kernel taint [ 56.623983] BUG: Bad rss-counter state mm:0000000017585d05 type:MM_FILEPAGES val:33 [ 56.624909] BUG: Bad rss-counter state mm:0000000017585d05 type:MM_ANONPAGES val:22 [ 57.125178] BUG: Bad rss-counter state mm:000000005c91da79 type:MM_FILEPAGES val:33 [ 57.126252] BUG: Bad rss-counter state mm:000000005c91da79 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:35782' (ECDSA) to the list of known hosts. 2023/06/19 19:31:46 fuzzer started 2023/06/19 19:31:47 dialing manager at localhost:44161 2023/06/19 19:31:47 checking machine... 2023/06/19 19:31:47 checking revisions... [ 57.880285] kmemleak: Automatic memory scanning thread ended 2023/06/19 19:31:47 testing simple program... [ 57.937759] cgroup: Unknown subsys name 'net' [ 57.988131] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 19:31:31 Registers: info registers vcpu 0 RAX=0000000000000009 RBX=0000000000000001 RCX=ffffffff812889a4 RDX=0000000000000009 RSI=ffffffff860b82d8 RDI=ffffffff85da7ddc RBP=ffff88806ce09af0 RSP=ffff88806ce099f0 R8 =ffffffff860b82d8 R9 =ffff88806ce09ad8 R10=0000000000038001 R11=000000000000ba82 R12=ffffffff85da7dfc R13=ffff88806ce09ae0 R14=ffff88806ce09ad9 R15=ffff88806ce09a98 RIP=ffffffff8112fc21 RFL=00000206 [-----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 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=00007ffeb3bfd938 CR3=000000000f16a000 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=2036343a31333a3931203931206e754a XMM01=657463656e6e6f63736944203a5d3932 XMM02=302e303120746f6f722072657375206d XMM03=203a5d3932325b646873732072656c6c XMM04=69662068637573206f4e203a656c6163 XMM05=3a656c696620766e65206e65706f206f XMM06=65733a6468737328766e655f6d617020 XMM07=6b7a79732036343a31333a3931203931 XMM08=3d656e696c646d632022656369767265 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=0000000000000000 RBX=ffffffff854ee9ec RCX=ffffffff814821c5 RDX=ffff88800dc451c0 RSI=0000000000000000 RDI=0000000000000004 RBP=0000000000000000 RSP=ffff888018e5f7b8 R8 =0000000000000004 R9 =0000000000000000 R10=00000000fffffffe R11=63206e6f69737365 R12=0000000000000000 R13=0000000000000001 R14=dffffc0000000000 R15=00000000fffffffe RIP=ffffffff814c07e0 RFL=00000213 [----A-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 00007f72d0f36700 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=00007f0a070dbd30 CR3=000000000f16a000 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=6d6f72662064657463656e6e6f637369 XMM02=2e303120746f6f722072657375206d6f XMM03=3a5d3932325b646873732036343a3133 XMM04=6456774875434142334f726f59427469 XMM05=485320415352203a3268737320363139 XMM06=206d6f726620746f6f7220726f662079 XMM07=00000000000000000000000000000000 XMM08=3a677562656420676f6c737973720000 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000