syzkaller login: [ 35.271680] BUG: Bad rss-counter state mm:00000000b6618208 type:MM_FILEPAGES val:33 [ 35.272890] BUG: Bad rss-counter state mm:00000000b6618208 type:MM_ANONPAGES val:22 [ 35.316081] ================================================================== [ 35.316608] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 35.317125] Read of size 8 at addr ffff8880159eaa50 by task sshd/219 [ 35.317546] [ 35.317669] CPU: 1 PID: 219 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 35.318181] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 35.318850] Call Trace: [ 35.319071] [ 35.319264] dump_stack_lvl+0x91/0xf0 [ 35.319594] print_report+0xcc/0x620 [ 35.319930] ? __virt_addr_valid+0x102/0x340 [ 35.320283] ? vma_interval_tree_remove+0xc75/0xec0 [ 35.320666] ? vma_interval_tree_remove+0xc75/0xec0 [ 35.321077] kasan_report+0xbe/0xf0 [ 35.321402] ? vma_interval_tree_remove+0xc75/0xec0 [ 35.321824] vma_interval_tree_remove+0xc75/0xec0 [ 35.322233] vma_prepare+0xc54/0x11a0 [ 35.322548] __split_vma+0x5af/0x950 [ 35.322855] ? __pfx___split_vma+0x10/0x10 [ 35.323190] ? find_held_lock+0x2c/0x110 [ 35.323515] do_vmi_align_munmap+0x2ba/0x11f0 [ 35.323830] ? lock_is_held_type+0x9f/0x120 [ 35.324108] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 35.324418] ? mtree_range_walk+0x632/0x900 [ 35.324703] ? mas_walk+0x5c7/0x7c0 [ 35.324946] do_vmi_munmap+0x1f1/0x2b0 [ 35.325206] mmap_region+0x1f9/0x2660 [ 35.325455] ? vm_mmap_pgoff+0x15c/0x3a0 [ 35.325718] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 35.326082] ? __pfx_lock_acquire+0x10/0x10 [ 35.326358] ? __pfx_mmap_region+0x10/0x10 [ 35.326631] ? security_mmap_addr+0x7d/0xa0 [ 35.326901] ? get_unmapped_area+0x1f5/0x3f0 [ 35.327182] do_mmap+0x854/0xf00 [ 35.327408] vm_mmap_pgoff+0x1a6/0x3a0 [ 35.327676] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 35.327963] ksys_mmap_pgoff+0x3af/0x500 [ 35.328222] do_syscall_64+0x3f/0x90 [ 35.328467] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 35.328796] RIP: 0033:0x7f38cfd6fd82 [ 35.329032] 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 [ 35.330088] RSP: 002b:00007ffd3ce9bf28 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 35.330540] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f38cfd6fd82 [ 35.330960] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f38cf1a9000 [ 35.331387] RBP: 00007f38cf1a9000 R08: 0000000000000009 R09: 0000000000001000 [ 35.331815] R10: 0000000000000812 R11: 0000000000000206 R12: 0000560485ab2b20 [ 35.332239] R13: 00007ffd3ce9bf40 R14: 00007ffd3ce9bf70 R15: 00007ffd3ce9c2d0 [ 35.332666] [ 35.332814] [ 35.332924] Allocated by task 212: [ 35.333142] kasan_save_stack+0x22/0x50 [ 35.333401] kasan_set_track+0x25/0x30 [ 35.333653] __kasan_slab_alloc+0x59/0x70 [ 35.333921] kmem_cache_alloc+0x16b/0x370 [ 35.334186] vm_area_dup+0x20/0x160 [ 35.334419] __split_vma+0x170/0x950 [ 35.334657] split_vma+0xc6/0x110 [ 35.334880] mprotect_fixup+0x8d2/0xb30 [ 35.335145] do_mprotect_pkey+0x87e/0xd40 [ 35.335411] __x64_sys_mprotect+0x78/0xc0 [ 35.335692] do_syscall_64+0x3f/0x90 [ 35.335936] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 35.336261] [ 35.336373] Freed by task 212: [ 35.336575] kasan_save_stack+0x22/0x50 [ 35.336830] kasan_set_track+0x25/0x30 [ 35.337082] kasan_save_free_info+0x2b/0x50 [ 35.337355] __kasan_slab_free+0x10a/0x190 [ 35.337628] kmem_cache_free+0x10d/0x4d0 [ 35.337890] rcu_core+0x8c8/0x2860 [ 35.338118] __do_softirq+0x1b7/0x7d4 [ 35.338363] [ 35.338474] Last potentially related work creation: [ 35.338771] kasan_save_stack+0x22/0x50 [ 35.339029] __kasan_record_aux_stack+0x8e/0xa0 [ 35.339323] __call_rcu_common.constprop.0+0x6a/0xb90 [ 35.339658] remove_vma+0x139/0x170 [ 35.339888] do_vmi_align_munmap+0xd4a/0x11f0 [ 35.340175] do_vmi_munmap+0x1f1/0x2b0 [ 35.340422] __vm_munmap+0x138/0x3a0 [ 35.340662] __x64_sys_munmap+0x59/0x80 [ 35.340916] do_syscall_64+0x3f/0x90 [ 35.341167] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 35.341495] [ 35.341605] The buggy address belongs to the object at ffff8880159ea9f8 [ 35.341605] which belongs to the cache vm_area_struct of size 168 [ 35.342347] The buggy address is located 88 bytes inside of [ 35.342347] freed 168-byte region [ffff8880159ea9f8, ffff8880159eaaa0) [ 35.343058] [ 35.343169] The buggy address belongs to the physical page: [ 35.343503] page:00000000c79c8a93 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x159ea [ 35.344058] memcg:ffff88800c54cb01 [ 35.344276] flags: 0x100000000000200(slab|node=0|zone=1) [ 35.344603] page_type: 0xffffffff() [ 35.344830] raw: 0100000000000200 ffff88800879fc80 dead000000000122 0000000000000000 [ 35.345293] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800c54cb01 [ 35.345751] page dumped because: kasan: bad access detected [ 35.346089] [ 35.346200] Memory state around the buggy address: [ 35.346499] ffff8880159ea900: fc fc 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 35.346926] ffff8880159ea980: 00 00 00 00 00 00 00 fc fc fc fc fc fc fc fc fa [ 35.347364] >ffff8880159eaa00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 35.347800] ^ [ 35.348153] ffff8880159eaa80: fb fb fb fb fc fc fc fc fc fc fc fc fa fb fb fb [ 35.348588] ffff8880159eab00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 35.349016] ================================================================== [ 35.349483] Disabling lock debugging due to kernel taint [ 37.140817] BUG: Bad rss-counter state mm:00000000c94595c1 type:MM_FILEPAGES val:33 [ 37.142158] BUG: Bad rss-counter state mm:00000000c94595c1 type:MM_ANONPAGES val:22 [ 37.721522] BUG: Bad rss-counter state mm:00000000c9302c6e type:MM_FILEPAGES val:33 [ 37.722874] BUG: Bad rss-counter state mm:00000000c9302c6e type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:41429' (ECDSA) to the list of known hosts. 2023/06/19 18:38:39 fuzzer started 2023/06/19 18:38:39 dialing manager at localhost:44161 2023/06/19 18:38:39 checking machine... 2023/06/19 18:38:39 checking revisions... [ 38.346362] kmemleak: Automatic memory scanning thread ended 2023/06/19 18:38:39 testing simple program... [ 38.401181] cgroup: Unknown subsys name 'net' [ 38.444148] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 18:38:35 Registers: info registers vcpu 0 RAX=fffffbfff0ba77da RBX=1ffff110031afeed RCX=ffffffff812d8ec3 RDX=0000000000000000 RSI=0000000000000008 RDI=ffffffff85d3bed0 RBP=fffffbfff0ba77da RSP=ffff888018d7f738 R8 =0000000000000000 R9 =fffffbfff0ba77da R10=ffffffff85d3bed7 R11=0000000000000000 R12=0000000000000000 R13=0000000000000000 R14=ffff88800fe282b0 R15=0000000000000000 RIP=ffffffff8180ef1a RFL=00000082 [--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 00007f575d07d700 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=00007fb96f5e7710 CR3=0000000006abe000 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=2038333a38333a3831203931206e754a XMM01=73732878696e755f6d6170203a5d3832 XMM02=65736f6c63206e6f6973736573203a29 XMM03=755f6d6170203a5d3832325b64687373 XMM04=69662068637573206f4e203a656c6163 XMM05=3a656c696620766e65206e65706f206f XMM06=65733a6468737328766e655f6d617020 XMM07=6b7a79732038333a38333a3831203931 XMM08=3d656e696c646d632022656369767265 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=0000000000000000 RBX=0000000000000000 RCX=ffffffff814c84ed RDX=ffff88800dd751c0 RSI=0000000000000000 RDI=0000000000000005 RBP=0000000000000000 RSP=ffff888019cb7a28 R8 =0000000000000005 R9 =0000000000000000 R10=0000000000000000 R11=00000000000b6996 R12=0000000000000000 R13=0000000000000000 R14=ffffffff85652988 R15=dffffc0000000000 RIP=ffffffff814c07e0 RFL=00000246 [---Z-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 00007fb13982e900 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=00007ffeda560000 CR3=0000000019ea4000 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=000000000000000000ffff0000000000 XMM02=2f00646f6874656d5f74707972636e65 XMM03=5320444f4854454d5f54505952434e45 XMM04=40404040404040404040404040404040 XMM05=5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a XMM06=20202020202020202020202020202020 XMM07=ff00ffffffffffffffffffffffffffff XMM08=20002020202020200020202020202020 XMM09=0000ffffffffffffffffffffffffffff XMM10=00002020202020200020202020202020 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000