syzkaller login: [ 30.169216] BUG: Bad rss-counter state mm:00000000cc3d9e01 type:MM_FILEPAGES val:33 [ 30.170238] BUG: Bad rss-counter state mm:00000000cc3d9e01 type:MM_ANONPAGES val:22 [ 30.329019] ================================================================== [ 30.329961] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 30.330904] Read of size 8 at addr ffff88800e8e9b38 by task sshd/219 [ 30.331775] [ 30.331997] CPU: 0 PID: 219 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 30.332882] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 30.333864] Call Trace: [ 30.334185] [ 30.334473] dump_stack_lvl+0x91/0xf0 [ 30.334958] print_report+0xcc/0x620 [ 30.335439] ? __virt_addr_valid+0x102/0x340 [ 30.335993] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.336630] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.337248] kasan_report+0xbe/0xf0 [ 30.337717] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.338330] vma_interval_tree_remove+0xc75/0xec0 [ 30.338933] vma_prepare+0xc54/0x11a0 [ 30.339413] __split_vma+0x5af/0x950 [ 30.339884] ? __pfx___split_vma+0x10/0x10 [ 30.340412] ? find_held_lock+0x2c/0x110 [ 30.340935] do_vmi_align_munmap+0x2ba/0x11f0 [ 30.341499] ? lock_is_held_type+0x9f/0x120 [ 30.342043] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 30.342645] ? mtree_range_walk+0x632/0x900 [ 30.343198] ? mas_walk+0x5c7/0x7c0 [ 30.343677] do_vmi_munmap+0x1f1/0x2b0 [ 30.344176] mmap_region+0x1f9/0x2660 [ 30.344671] ? vm_mmap_pgoff+0x15c/0x3a0 [ 30.345178] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 30.345901] ? __pfx_lock_acquire+0x10/0x10 [ 30.346435] ? __pfx_mmap_region+0x10/0x10 [ 30.346968] ? security_mmap_addr+0x7d/0xa0 [ 30.347496] ? get_unmapped_area+0x1f5/0x3f0 [ 30.348047] do_mmap+0x854/0xf00 [ 30.348490] vm_mmap_pgoff+0x1a6/0x3a0 [ 30.349000] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 30.349565] ksys_mmap_pgoff+0x3af/0x500 [ 30.350080] do_syscall_64+0x3f/0x90 [ 30.350561] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.351207] RIP: 0033:0x7fc124c93d82 [ 30.351671] 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 [ 30.353776] RSP: 002b:00007ffefd879218 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 30.354676] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007fc124c93d82 [ 30.355517] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007fc1240cd000 [ 30.356358] RBP: 00007fc1240cd000 R08: 0000000000000009 R09: 0000000000001000 [ 30.357207] R10: 0000000000000812 R11: 0000000000000206 R12: 000055b53b34df70 [ 30.358048] R13: 00007ffefd879230 R14: 00007ffefd879260 R15: 00007ffefd8795c0 [ 30.358895] [ 30.359186] [ 30.359403] Allocated by task 212: [ 30.359828] kasan_save_stack+0x22/0x50 [ 30.360330] kasan_set_track+0x25/0x30 [ 30.360844] __kasan_slab_alloc+0x59/0x70 [ 30.361366] kmem_cache_alloc+0x16b/0x370 [ 30.361882] vm_area_dup+0x20/0x160 [ 30.362331] __split_vma+0x170/0x950 [ 30.362796] split_vma+0xc6/0x110 [ 30.363234] mprotect_fixup+0x8d2/0xb30 [ 30.363735] do_mprotect_pkey+0x87e/0xd40 [ 30.364256] __x64_sys_mprotect+0x78/0xc0 [ 30.364786] do_syscall_64+0x3f/0x90 [ 30.365257] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.365900] [ 30.366116] Freed by task 212: [ 30.366502] kasan_save_stack+0x22/0x50 [ 30.367005] kasan_set_track+0x25/0x30 [ 30.367504] kasan_save_free_info+0x2b/0x50 [ 30.368035] __kasan_slab_free+0x10a/0x190 [ 30.368568] kmem_cache_free+0x10d/0x4d0 [ 30.369090] rcu_core+0x8c8/0x2860 [ 30.369541] __do_softirq+0x1b7/0x7d4 [ 30.370018] [ 30.370234] Last potentially related work creation: [ 30.370816] kasan_save_stack+0x22/0x50 [ 30.371317] __kasan_record_aux_stack+0x8e/0xa0 [ 30.371886] __call_rcu_common.constprop.0+0x6a/0xb90 [ 30.372523] remove_vma+0x139/0x170 [ 30.372981] do_vmi_align_munmap+0xd4a/0x11f0 [ 30.373529] do_vmi_munmap+0x1f1/0x2b0 [ 30.374016] __vm_munmap+0x138/0x3a0 [ 30.374481] __x64_sys_munmap+0x59/0x80 [ 30.374977] do_syscall_64+0x3f/0x90 [ 30.375448] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.376087] [ 30.376303] Second to last potentially related work creation: [ 30.376987] kasan_save_stack+0x22/0x50 [ 30.377487] __kasan_record_aux_stack+0x8e/0xa0 [ 30.378052] __call_rcu_common.constprop.0+0x6a/0xb90 [ 30.378696] remove_vma+0x139/0x170 [ 30.379145] do_vmi_align_munmap+0xd4a/0x11f0 [ 30.379699] do_vmi_munmap+0x1f1/0x2b0 [ 30.380188] mmap_region+0x1f9/0x2660 [ 30.380683] do_mmap+0x854/0xf00 [ 30.381114] vm_mmap_pgoff+0x1a6/0x3a0 [ 30.381597] ksys_mmap_pgoff+0x3af/0x500 [ 30.382100] do_syscall_64+0x3f/0x90 [ 30.382571] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.383210] [ 30.383425] The buggy address belongs to the object at ffff88800e8e9ae0 [ 30.383425] which belongs to the cache vm_area_struct of size 168 [ 30.384893] The buggy address is located 88 bytes inside of [ 30.384893] freed 168-byte region [ffff88800e8e9ae0, ffff88800e8e9b88) [ 30.386287] [ 30.386504] The buggy address belongs to the physical page: [ 30.387152] page:000000001cfafd0f refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xe8e9 [ 30.388235] memcg:ffff88800d3f9001 [ 30.388665] flags: 0x100000000000200(slab|node=0|zone=1) [ 30.389307] page_type: 0xffffffff() [ 30.389758] raw: 0100000000000200 ffff8880087a0c80 ffffea00003759c0 dead000000000004 [ 30.390678] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800d3f9001 [ 30.391576] page dumped because: kasan: bad access detected [ 30.392231] [ 30.392446] Memory state around the buggy address: [ 30.393040] ffff88800e8e9a00: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 30.393894] ffff88800e8e9a80: 00 00 00 00 fc fc fc fc fc fc fc fc fa fb fb fb [ 30.394739] >ffff88800e8e9b00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 30.395575] ^ [ 30.396191] ffff88800e8e9b80: fb fc fc fc fc fc fc fc fc 00 00 00 00 00 00 00 [ 30.397042] ffff88800e8e9c00: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 fc fc [ 30.397883] ================================================================== [ 30.398835] Disabling lock debugging due to kernel taint [ 33.037316] BUG: Bad rss-counter state mm:000000004ef41d4e type:MM_FILEPAGES val:33 [ 33.038471] BUG: Bad rss-counter state mm:000000004ef41d4e type:MM_ANONPAGES val:22 [ 33.422822] BUG: Bad rss-counter state mm:00000000db4acaae type:MM_FILEPAGES val:33 [ 33.423873] BUG: Bad rss-counter state mm:00000000db4acaae type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:44596' (ECDSA) to the list of known hosts. 2023/06/20 12:17:13 fuzzer started 2023/06/20 12:17:13 dialing manager at localhost:36067 2023/06/20 12:17:13 checking machine... 2023/06/20 12:17:13 checking revisions... [ 34.149538] kmemleak: Automatic memory scanning thread ended 2023/06/20 12:17:13 testing simple program... [ 34.210519] cgroup: Unknown subsys name 'net' [ 34.267528] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 12:17:13 Registers: info registers vcpu 0 RAX=ffffffff84537da7 RBX=0000000000000005 RCX=0000000000000000 RDX=0000000000000000 RSI=0000000000000013 RDI=ffff88806ce09bd0 RBP=dffffc0000000000 RSP=ffff88806ce09b18 R8 =0000000000000000 R9 =fffffbfff0ba7a6a R10=ffffffff85d3d357 R11=00000000000b6a61 R12=0000000000000013 R13=0000000000000000 R14=ffff88806ce09ba8 R15=ffff888009906600 RIP=ffffffff813ad62f 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 00007fe2c8a39900 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=00007fe2c8ff0618 CR3=0000000019e36000 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=00007fe2c8ff10b0 CR3=000000000e878000 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=2032313a37313a3231203032206e754a XMM01=73732878696e755f6d6170203a5d3832 XMM02=65736f6c63206e6f6973736573203a29 XMM03=755f6d6170203a5d3832325b64687373 XMM04=69662068637573206f4e203a656c6163 XMM05=3a656c696620766e65206e65706f206f XMM06=65733a6468737328766e655f6d617020 XMM07=6b7a79732032313a37313a3231203032 XMM08=3d656e696c646d632022656369767265 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000