syzkaller login: [ 39.210770] BUG: Bad rss-counter state mm:000000006aee572a type:MM_FILEPAGES val:33 [ 39.212114] BUG: Bad rss-counter state mm:000000006aee572a type:MM_ANONPAGES val:22 [ 39.263004] ================================================================== [ 39.263930] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 39.264867] Read of size 8 at addr ffff88800dc1a968 by task sshd/219 [ 39.265633] [ 39.265854] CPU: 0 PID: 219 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 39.266713] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 39.267758] Call Trace: [ 39.268085] [ 39.268469] dump_stack_lvl+0x91/0xf0 [ 39.268970] print_report+0xcc/0x620 [ 39.269451] ? __virt_addr_valid+0x102/0x340 [ 39.270009] ? vma_interval_tree_remove+0xc75/0xec0 [ 39.270630] ? vma_interval_tree_remove+0xc75/0xec0 [ 39.271292] kasan_report+0xbe/0xf0 [ 39.271795] ? vma_interval_tree_remove+0xc75/0xec0 [ 39.272415] vma_interval_tree_remove+0xc75/0xec0 [ 39.273015] vma_prepare+0xc54/0x11a0 [ 39.273489] __split_vma+0x5af/0x950 [ 39.273966] ? __pfx___split_vma+0x10/0x10 [ 39.274500] ? find_held_lock+0x2c/0x110 [ 39.275017] do_vmi_align_munmap+0x2ba/0x11f0 [ 39.275621] ? lock_is_held_type+0x9f/0x120 [ 39.276155] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 39.276764] ? mtree_range_walk+0x632/0x900 [ 39.277324] ? mas_walk+0x5c7/0x7c0 [ 39.277801] do_vmi_munmap+0x1f1/0x2b0 [ 39.278313] mmap_region+0x1f9/0x2660 [ 39.278794] ? vm_mmap_pgoff+0x15c/0x3a0 [ 39.279346] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 39.280093] ? __pfx_lock_acquire+0x10/0x10 [ 39.280638] ? __pfx_mmap_region+0x10/0x10 [ 39.281174] ? security_mmap_addr+0x7d/0xa0 [ 39.281705] ? get_unmapped_area+0x1f5/0x3f0 [ 39.282259] do_mmap+0x854/0xf00 [ 39.282699] vm_mmap_pgoff+0x1a6/0x3a0 [ 39.283230] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 39.283809] ksys_mmap_pgoff+0x3af/0x500 [ 39.284316] do_syscall_64+0x3f/0x90 [ 39.284800] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 39.285440] RIP: 0033:0x7f07fa942d82 [ 39.285900] 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 [ 39.288074] RSP: 002b:00007ffe14287a98 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 39.289026] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f07fa942d82 [ 39.289870] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f07f9d7c000 [ 39.290714] RBP: 00007f07f9d7c000 R08: 0000000000000009 R09: 0000000000001000 [ 39.291594] R10: 0000000000000812 R11: 0000000000000206 R12: 00005635af34fb20 [ 39.292435] R13: 00007ffe14287ab0 R14: 00007ffe14287ae0 R15: 00007ffe14287e40 [ 39.293281] [ 39.293571] [ 39.293783] Allocated by task 212: [ 39.294253] kasan_save_stack+0x22/0x50 [ 39.294753] kasan_set_track+0x25/0x30 [ 39.295243] __kasan_slab_alloc+0x59/0x70 [ 39.295779] kmem_cache_alloc+0x16b/0x370 [ 39.296287] vm_area_dup+0x20/0x160 [ 39.296738] __split_vma+0x170/0x950 [ 39.297216] split_vma+0xc6/0x110 [ 39.297652] mprotect_fixup+0x8d2/0xb30 [ 39.298188] do_mprotect_pkey+0x87e/0xd40 [ 39.298714] __x64_sys_mprotect+0x78/0xc0 [ 39.299241] do_syscall_64+0x3f/0x90 [ 39.299737] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 39.300395] [ 39.300608] Freed by task 212: [ 39.300999] kasan_save_stack+0x22/0x50 [ 39.301504] kasan_set_track+0x25/0x30 [ 39.301997] kasan_save_free_info+0x2b/0x50 [ 39.302556] __kasan_slab_free+0x10a/0x190 [ 39.303091] kmem_cache_free+0x10d/0x4d0 [ 39.303616] rcu_core+0x8c8/0x2860 [ 39.304058] __do_softirq+0x1b7/0x7d4 [ 39.304534] [ 39.304748] Last potentially related work creation: [ 39.305343] kasan_save_stack+0x22/0x50 [ 39.305850] __kasan_record_aux_stack+0x8e/0xa0 [ 39.306452] __call_rcu_common.constprop.0+0x6a/0xb90 [ 39.307089] remove_vma+0x139/0x170 [ 39.307543] do_vmi_align_munmap+0xd4a/0x11f0 [ 39.308142] do_vmi_munmap+0x1f1/0x2b0 [ 39.308631] __vm_munmap+0x138/0x3a0 [ 39.309096] __x64_sys_munmap+0x59/0x80 [ 39.309588] do_syscall_64+0x3f/0x90 [ 39.310079] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 39.310739] [ 39.310956] The buggy address belongs to the object at ffff88800dc1a910 [ 39.310956] which belongs to the cache vm_area_struct of size 168 [ 39.312438] The buggy address is located 88 bytes inside of [ 39.312438] freed 168-byte region [ffff88800dc1a910, ffff88800dc1a9b8) [ 39.313840] [ 39.314072] The buggy address belongs to the physical page: [ 39.314750] page:00000000ab50fe72 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xdc1a [ 39.315841] memcg:ffff88800b3b1a01 [ 39.316261] flags: 0x100000000000200(slab|node=0|zone=1) [ 39.316905] page_type: 0xffffffff() [ 39.317354] raw: 0100000000000200 ffff8880087a0c80 ffffea0000391d00 dead000000000008 [ 39.318301] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800b3b1a01 [ 39.319188] page dumped because: kasan: bad access detected [ 39.319854] [ 39.320070] Memory state around the buggy address: [ 39.320643] ffff88800dc1a800: fc fc fc fc fc fa fb fb fb fb fb fb fb fb fb fb [ 39.321492] ffff88800dc1a880: fb fb fb fb fb fb fb fb fb fb fc fc fc fc fc fc [ 39.322375] >ffff88800dc1a900: fc fc fa fb fb fb fb fb fb fb fb fb fb fb fb fb [ 39.323220] ^ [ 39.323998] ffff88800dc1a980: fb fb fb fb fb fb fb fc fc fc fc fc fc fc fc fa [ 39.324853] ffff88800dc1aa00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 39.325691] ================================================================== [ 39.326698] Disabling lock debugging due to kernel taint [ 41.343975] BUG: Bad rss-counter state mm:00000000896c3bd2 type:MM_FILEPAGES val:33 [ 41.344959] BUG: Bad rss-counter state mm:00000000896c3bd2 type:MM_ANONPAGES val:22 [ 41.819079] BUG: Bad rss-counter state mm:00000000bc3be408 type:MM_FILEPAGES val:33 [ 41.820256] BUG: Bad rss-counter state mm:00000000bc3be408 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:31426' (ECDSA) to the list of known hosts. 2023/06/20 23:59:57 fuzzer started 2023/06/20 23:59:57 dialing manager at localhost:36067 2023/06/20 23:59:57 checking machine... 2023/06/20 23:59:57 checking revisions... [ 42.547183] kmemleak: Automatic memory scanning thread ended 2023/06/20 23:59:57 testing simple program... [ 42.597012] cgroup: Unknown subsys name 'net' [ 42.645550] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 23:59:56 Registers: info registers vcpu 0 RAX=ffffed1001db110a RBX=0000000000000000 RCX=0000000000000000 RDX=0000000000000000 RSI=00000000000000fb RDI=ffffed1001db1128 RBP=ffffffff813782f8 RSP=ffff888008d9fce8 R8 =0000000000000006 R9 =0000000000000002 R10=ffffed1001db110a R11=0000000000000128 R12=ffff88800ed88850 R13=ffff88800844f780 R14=ffffffff813782f8 R15=ffff88800ed888d0 RIP=ffffffff8180ca4f 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 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=00007f571fa30650 CR3=000000000e226000 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=2036353a39353a3332203032206e754a XMM01=657463656e6e6f63736944203a5d3832 XMM02=302e303120746f6f722072657375206d XMM03=203a5d3832325b646873732072656c6c XMM04=69662068637573206f4e203a656c6163 XMM05=3a656c696620766e65206e65706f206f XMM06=65733a6468737328766e655f6d617020 XMM07=6b7a79732036353a39353a3332203032 XMM08=3d656e696c646d632022656369767265 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=1ffff1100118de46 RBX=0000000000000001 RCX=0000000000000000 RDX=ffff888015d4d1c0 RSI=ffffffff8386ab20 RDI=ffff888008c6f230 RBP=ffff888008c6f280 RSP=ffff88800c70fbb0 R8 =0000000000000001 R9 =0000000000000000 R10=0000000000000001 R11=0000000000000000 R12=ffff888008fe8000 R13=ffff888008c6f200 R14=dffffc0000000000 R15=0000000000000000 RIP=ffffffff84511dc4 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 00007f571f47b900 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=00007f571fa32618 CR3=000000000ed94000 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