syzkaller login: [ 56.130843] BUG: Bad rss-counter state mm:000000000ecec67c type:MM_FILEPAGES val:33 [ 56.132026] BUG: Bad rss-counter state mm:000000000ecec67c type:MM_ANONPAGES val:22 [ 56.290513] ================================================================== [ 56.291422] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 56.292344] Read of size 8 at addr ffff88801968c968 by task sshd/225 [ 56.293299] [ 56.293516] CPU: 1 PID: 225 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 56.294377] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 56.295382] Call Trace: [ 56.295696] [ 56.295976] dump_stack_lvl+0x91/0xf0 [ 56.296462] print_report+0xcc/0x620 [ 56.296940] ? __virt_addr_valid+0x102/0x340 [ 56.297486] ? vma_interval_tree_remove+0xc75/0xec0 [ 56.298103] ? vma_interval_tree_remove+0xc75/0xec0 [ 56.298716] kasan_report+0xbe/0xf0 [ 56.299218] ? vma_interval_tree_remove+0xc75/0xec0 [ 56.299839] vma_interval_tree_remove+0xc75/0xec0 [ 56.300433] vma_prepare+0xc54/0x11a0 [ 56.300907] __split_vma+0x5af/0x950 [ 56.301387] ? __pfx___split_vma+0x10/0x10 [ 56.301917] ? find_held_lock+0x2c/0x110 [ 56.302435] do_vmi_align_munmap+0x2ba/0x11f0 [ 56.303019] ? lock_is_held_type+0x9f/0x120 [ 56.303558] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 56.304173] ? mtree_range_walk+0x632/0x900 [ 56.304733] ? mas_walk+0x5c7/0x7c0 [ 56.305208] do_vmi_munmap+0x1f1/0x2b0 [ 56.305701] mmap_region+0x1f9/0x2660 [ 56.306185] ? vm_mmap_pgoff+0x15c/0x3a0 [ 56.306691] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 56.307429] ? __pfx_lock_acquire+0x10/0x10 [ 56.307967] ? __pfx_mmap_region+0x10/0x10 [ 56.308498] ? security_mmap_addr+0x7d/0xa0 [ 56.309022] ? get_unmapped_area+0x1f5/0x3f0 [ 56.309576] do_mmap+0x854/0xf00 [ 56.310021] vm_mmap_pgoff+0x1a6/0x3a0 [ 56.310520] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 56.311087] ksys_mmap_pgoff+0x3af/0x500 [ 56.311600] do_syscall_64+0x3f/0x90 [ 56.312078] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 56.312718] RIP: 0033:0x7fd4dd7acd82 [ 56.313169] 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 [ 56.315324] RSP: 002b:00007ffe3d0eea28 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 56.316235] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007fd4dd7acd82 [ 56.317084] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007fd4dcbe6000 [ 56.317939] RBP: 00007fd4dcbe6000 R08: 0000000000000009 R09: 0000000000001000 [ 56.318792] R10: 0000000000000812 R11: 0000000000000206 R12: 000055d749ab9ec0 [ 56.319657] R13: 00007ffe3d0eea40 R14: 00007ffe3d0eea70 R15: 00007ffe3d0eedd0 [ 56.320507] [ 56.320800] [ 56.321012] Allocated by task 218: [ 56.321442] kasan_save_stack+0x22/0x50 [ 56.321952] kasan_set_track+0x25/0x30 [ 56.322445] __kasan_slab_alloc+0x59/0x70 [ 56.322968] kmem_cache_alloc+0x16b/0x370 [ 56.323483] vm_area_dup+0x20/0x160 [ 56.323940] __split_vma+0x170/0x950 [ 56.324413] split_vma+0xc6/0x110 [ 56.324851] mprotect_fixup+0x8d2/0xb30 [ 56.325352] do_mprotect_pkey+0x87e/0xd40 [ 56.325868] __x64_sys_mprotect+0x78/0xc0 [ 56.326393] do_syscall_64+0x3f/0x90 [ 56.326868] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 56.327525] [ 56.327741] Freed by task 218: [ 56.328137] kasan_save_stack+0x22/0x50 [ 56.328644] kasan_set_track+0x25/0x30 [ 56.329136] kasan_save_free_info+0x2b/0x50 [ 56.329672] __kasan_slab_free+0x10a/0x190 [ 56.330202] kmem_cache_free+0x10d/0x4d0 [ 56.330705] rcu_core+0x8c8/0x2860 [ 56.331153] __do_softirq+0x1b7/0x7d4 [ 56.331633] [ 56.331849] Last potentially related work creation: [ 56.332432] kasan_save_stack+0x22/0x50 [ 56.332936] __kasan_record_aux_stack+0x8e/0xa0 [ 56.333505] __call_rcu_common.constprop.0+0x6a/0xb90 [ 56.334148] remove_vma+0x139/0x170 [ 56.334637] do_vmi_align_munmap+0xd4a/0x11f0 [ 56.335218] do_vmi_munmap+0x1f1/0x2b0 [ 56.335698] __vm_munmap+0x138/0x3a0 [ 56.336165] __x64_sys_munmap+0x59/0x80 [ 56.336663] do_syscall_64+0x3f/0x90 [ 56.337148] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 56.337797] [ 56.338016] The buggy address belongs to the object at ffff88801968c910 [ 56.338016] which belongs to the cache vm_area_struct of size 168 [ 56.339495] The buggy address is located 88 bytes inside of [ 56.339495] freed 168-byte region [ffff88801968c910, ffff88801968c9b8) [ 56.340893] [ 56.341116] The buggy address belongs to the physical page: [ 56.341766] page:00000000fd97a958 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x1968c [ 56.342857] memcg:ffff888019689101 [ 56.343290] flags: 0x100000000000200(slab|node=0|zone=1) [ 56.343951] page_type: 0xffffffff() [ 56.344406] raw: 0100000000000200 ffff8880087a0c80 dead000000000122 0000000000000000 [ 56.345331] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff888019689101 [ 56.346246] page dumped because: kasan: bad access detected [ 56.346911] [ 56.347150] Memory state around the buggy address: [ 56.347734] ffff88801968c800: fc fc fc fc fc 00 00 00 00 00 00 00 00 00 00 00 [ 56.348598] ffff88801968c880: 00 00 00 00 00 00 00 00 00 00 fc fc fc fc fc fc [ 56.349451] >ffff88801968c900: fc fc fa fb fb fb fb fb fb fb fb fb fb fb fb fb [ 56.350293] ^ [ 56.351083] ffff88801968c980: fb fb fb fb fb fb fb fc fc fc fc fc fc fc fc fa [ 56.351947] ffff88801968ca00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 56.352787] ================================================================== [ 56.353713] Disabling lock debugging due to kernel taint [ 58.346051] BUG: Bad rss-counter state mm:00000000db8ef913 type:MM_FILEPAGES val:33 [ 58.347253] BUG: Bad rss-counter state mm:00000000db8ef913 type:MM_ANONPAGES val:22 [ 58.823820] BUG: Bad rss-counter state mm:000000007e4c0c37 type:MM_FILEPAGES val:33 [ 58.825360] BUG: Bad rss-counter state mm:000000007e4c0c37 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:32908' (ECDSA) to the list of known hosts. 2023/06/20 14:01:37 fuzzer started 2023/06/20 14:01:37 dialing manager at localhost:36067 2023/06/20 14:01:37 checking machine... 2023/06/20 14:01:37 checking revisions... [ 59.614356] kmemleak: Automatic memory scanning thread ended 2023/06/20 14:01:37 testing simple program... [ 59.656260] cgroup: Unknown subsys name 'net' [ 59.712312] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 14:01:37 Registers: info registers vcpu 0 RAX=0000000000000001 RBX=ffff8880176f1a00 RCX=ffffffff8366a1c8 RDX=ffffed10018dee8d RSI=0000000000000004 RDI=ffff88800c6f7460 RBP=0000000000000000 RSP=ffff88801bbe7af8 R8 =0000000000000001 R9 =ffffed10018dee8c R10=ffff88800c6f7463 R11=00000000000b6a61 R12=ffff88800c6f7460 R13=ffff88800c6f7440 R14=0000000000000cc0 R15=ffff888008fae000 RIP=ffffffff8366a1c8 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 00007f61256b1900 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=00007f92a86f72b0 CR3=000000000ffdc000 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=ffff88806cf35000 RBX=0000000000000001 RCX=ffffffff8451250e RDX=ffffed100d9e6a01 RSI=0000000000000004 RDI=ffffffff81288ac5 RBP=dffffc0000000000 RSP=ffff888008e07e70 R8 =0000000000000000 R9 =ffffed100d9e6a00 R10=ffff88806cf35003 R11=0000000000000001 R12=ffffffff85d3d350 R13=1ffff110011c0fd3 R14=0000000000000000 R15=0000000000000000 RIP=ffffffff8451349f RFL=00000246 [---Z-P-] CPL=0 II=0 A20=1 SMM=0 HLT=1 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 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=00007f6125c68618 CR3=000000000ffdc000 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