syzkaller login: [ 31.819805] BUG: Bad rss-counter state mm:00000000d81e99c6 type:MM_FILEPAGES val:33 [ 31.820906] BUG: Bad rss-counter state mm:00000000d81e99c6 type:MM_ANONPAGES val:22 [ 31.855684] ================================================================== [ 31.856678] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 31.857735] Read of size 8 at addr ffff88800f736ed8 by task sshd/219 [ 31.858529] [ 31.858750] CPU: 0 PID: 219 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 31.859649] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 31.860641] Call Trace: [ 31.860957] [ 31.861241] dump_stack_lvl+0x91/0xf0 [ 31.861737] print_report+0xcc/0x620 [ 31.862224] ? __virt_addr_valid+0x102/0x340 [ 31.862779] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.863433] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.864063] kasan_report+0xbe/0xf0 [ 31.864552] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.865192] vma_interval_tree_remove+0xc75/0xec0 [ 31.865809] vma_prepare+0xc54/0x11a0 [ 31.866288] __split_vma+0x5af/0x950 [ 31.866764] ? __pfx___split_vma+0x10/0x10 [ 31.867378] ? find_held_lock+0x2c/0x110 [ 31.867931] do_vmi_align_munmap+0x2ba/0x11f0 [ 31.868525] ? lock_is_held_type+0x9f/0x120 [ 31.869087] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 31.869732] ? mtree_range_walk+0x632/0x900 [ 31.870311] ? mas_walk+0x5c7/0x7c0 [ 31.870811] do_vmi_munmap+0x1f1/0x2b0 [ 31.871351] mmap_region+0x1f9/0x2660 [ 31.871865] ? vm_mmap_pgoff+0x15c/0x3a0 [ 31.872400] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 31.873160] ? __pfx_lock_acquire+0x10/0x10 [ 31.873723] ? __pfx_mmap_region+0x10/0x10 [ 31.874277] ? security_mmap_addr+0x7d/0xa0 [ 31.874834] ? get_unmapped_area+0x1f5/0x3f0 [ 31.875421] do_mmap+0x854/0xf00 [ 31.875884] vm_mmap_pgoff+0x1a6/0x3a0 [ 31.876402] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 31.876991] ksys_mmap_pgoff+0x3af/0x500 [ 31.877528] do_syscall_64+0x3f/0x90 [ 31.878032] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.878716] RIP: 0033:0x7f1e703d8d82 [ 31.879205] 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 [ 31.881476] RSP: 002b:00007ffede4f0a18 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 31.882444] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f1e703d8d82 [ 31.883362] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f1e6f812000 [ 31.884258] RBP: 00007f1e6f812000 R08: 0000000000000009 R09: 0000000000001000 [ 31.885155] R10: 0000000000000812 R11: 0000000000000206 R12: 0000563f1011eec0 [ 31.886051] R13: 00007ffede4f0a30 R14: 00007ffede4f0a60 R15: 00007ffede4f0dc0 [ 31.886969] [ 31.887290] [ 31.887514] Allocated by task 212: [ 31.887965] kasan_save_stack+0x22/0x50 [ 31.888498] kasan_set_track+0x25/0x30 [ 31.889016] __kasan_slab_alloc+0x59/0x70 [ 31.889568] kmem_cache_alloc+0x16b/0x370 [ 31.890107] vm_area_dup+0x20/0x160 [ 31.890589] __split_vma+0x170/0x950 [ 31.891079] split_vma+0xc6/0x110 [ 31.891579] mprotect_fixup+0x8d2/0xb30 [ 31.892111] do_mprotect_pkey+0x87e/0xd40 [ 31.892663] __x64_sys_mprotect+0x78/0xc0 [ 31.893213] do_syscall_64+0x3f/0x90 [ 31.893711] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.894391] [ 31.894621] Freed by task 212: [ 31.895035] kasan_save_stack+0x22/0x50 [ 31.895573] kasan_set_track+0x25/0x30 [ 31.896101] kasan_save_free_info+0x2b/0x50 [ 31.896659] __kasan_slab_free+0x10a/0x190 [ 31.897226] kmem_cache_free+0x10d/0x4d0 [ 31.897762] rcu_core+0x8c8/0x2860 [ 31.898228] __do_softirq+0x1b7/0x7d4 [ 31.898728] [ 31.898954] Last potentially related work creation: [ 31.899590] kasan_save_stack+0x22/0x50 [ 31.900128] __kasan_record_aux_stack+0x8e/0xa0 [ 31.900733] __call_rcu_common.constprop.0+0x6a/0xb90 [ 31.901415] remove_vma+0x139/0x170 [ 31.901889] do_vmi_align_munmap+0xd4a/0x11f0 [ 31.902473] do_vmi_munmap+0x1f1/0x2b0 [ 31.902983] __vm_munmap+0x138/0x3a0 [ 31.903489] __x64_sys_munmap+0x59/0x80 [ 31.904016] do_syscall_64+0x3f/0x90 [ 31.904516] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.905188] [ 31.905413] Second to last potentially related work creation: [ 31.906129] kasan_save_stack+0x22/0x50 [ 31.906658] __kasan_record_aux_stack+0x8e/0xa0 [ 31.907269] __call_rcu_common.constprop.0+0x6a/0xb90 [ 31.907955] remove_vma+0x139/0x170 [ 31.908433] do_vmi_align_munmap+0xd4a/0x11f0 [ 31.909019] do_vmi_munmap+0x1f1/0x2b0 [ 31.909538] mmap_region+0x1f9/0x2660 [ 31.910031] do_mmap+0x854/0xf00 [ 31.910479] vm_mmap_pgoff+0x1a6/0x3a0 [ 31.910993] ksys_mmap_pgoff+0x3af/0x500 [ 31.911540] do_syscall_64+0x3f/0x90 [ 31.912036] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.912714] [ 31.912942] The buggy address belongs to the object at ffff88800f736e80 [ 31.912942] which belongs to the cache vm_area_struct of size 168 [ 31.914498] The buggy address is located 88 bytes inside of [ 31.914498] freed 168-byte region [ffff88800f736e80, ffff88800f736f28) [ 31.915992] [ 31.916217] The buggy address belongs to the physical page: [ 31.916921] page:000000003ea23c82 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xf736 [ 31.918065] memcg:ffff88800dd05901 [ 31.918512] anon flags: 0x100000000000200(slab|node=0|zone=1) [ 31.919270] page_type: 0xffffffff() [ 31.919752] raw: 0100000000000200 ffff8880087a0c80 0000000000000000 dead000000000001 [ 31.920722] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800dd05901 [ 31.921678] page dumped because: kasan: bad access detected [ 31.922381] [ 31.922607] Memory state around the buggy address: [ 31.923228] ffff88800f736d80: fc fc fc fa fb fb fb fb fb fb fb fb fb fb fb fb [ 31.924125] ffff88800f736e00: fb fb fb fb fb fb fb fb fc fc fc fc fc fc fc fc [ 31.925034] >ffff88800f736e80: fa fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 31.925940] ^ [ 31.926698] ffff88800f736f00: fb fb fb fb fb fc fc fc fc fc fc fc fc fc fc fc [ 31.927609] ffff88800f736f80: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc [ 31.928517] ================================================================== [ 31.929647] Disabling lock debugging due to kernel taint [ 34.009775] BUG: Bad rss-counter state mm:000000006583d837 type:MM_FILEPAGES val:33 [ 34.011001] BUG: Bad rss-counter state mm:000000006583d837 type:MM_ANONPAGES val:22 [ 34.431710] BUG: Bad rss-counter state mm:000000007da403ce type:MM_FILEPAGES val:33 [ 34.432643] BUG: Bad rss-counter state mm:000000007da403ce type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:63280' (ECDSA) to the list of known hosts. 2023/06/20 17:08:51 fuzzer started 2023/06/20 17:08:52 dialing manager at localhost:36067 2023/06/20 17:08:52 checking machine... 2023/06/20 17:08:52 checking revisions... [ 35.135230] kmemleak: Automatic memory scanning thread ended 2023/06/20 17:08:52 testing simple program... [ 35.177733] cgroup: Unknown subsys name 'net' [ 35.243142] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 17:08:51 Registers: info registers vcpu 0 RAX=ffff88806ce35000 RBX=0000000000000000 RCX=ffffffff8451250e RDX=ffffed100d9c6a01 RSI=0000000000000004 RDI=ffffffff81288ac5 RBP=dffffc0000000000 RSP=ffffffff85407e10 R8 =0000000000000000 R9 =ffffed100d9c6a00 R10=ffff88806ce35003 R11=ffff888008c04000 R12=ffffffff85d3d350 R13=1ffffffff0a80fc7 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 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=00007ffec5b09608 CR3=000000000e3be000 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=2031353a38303a3731203032206e754a XMM01=657463656e6e6f63736944203a5d3932 XMM02=302e303120746f6f722072657375206d XMM03=203a5d3932325b646873732072656c6c XMM04=69662068637573206f4e203a656c6163 XMM05=3a656c696620766e65206e65706f206f XMM06=65733a6468737328766e655f6d617020 XMM07=6b7a79732031353a38303a3731203032 XMM08=3d656e696c646d632022656369767265 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=0000000000000000 RBX=00007f0f92d25477 RCX=ffffffff812d86ea RDX=0000000000000000 RSI=00007f0f92d25477 RDI=ffffffff85652c60 RBP=00007f0f92d25477 RSP=ffff888017dbf8e0 R8 =0000000000000000 R9 =fffffbfff0ba7a6a R10=ffffffff85d3d357 R11=00000000000b6a61 R12=ffff888017dbf9f0 R13=0000000000000000 R14=ffff888014201b40 R15=0000000000000cc0 RIP=ffffffff814c8450 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 00007f0f92832900 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=00007f0f92de9618 CR3=000000000e4ec000 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