syzkaller login: [ 38.655689] BUG: Bad rss-counter state mm:00000000ba443fdb type:MM_FILEPAGES val:33 [ 38.656757] BUG: Bad rss-counter state mm:00000000ba443fdb type:MM_ANONPAGES val:22 [ 38.816752] ================================================================== [ 38.817659] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 38.818590] Read of size 8 at addr ffff88800fbe3b38 by task sshd/219 [ 38.819365] [ 38.819584] CPU: 1 PID: 219 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 38.820592] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 38.821707] Call Trace: [ 38.822029] [ 38.822318] dump_stack_lvl+0x91/0xf0 [ 38.822830] print_report+0xcc/0x620 [ 38.823325] ? __virt_addr_valid+0x102/0x340 [ 38.823892] ? vma_interval_tree_remove+0xc75/0xec0 [ 38.824546] ? vma_interval_tree_remove+0xc75/0xec0 [ 38.825166] kasan_report+0xbe/0xf0 [ 38.825643] ? vma_interval_tree_remove+0xc75/0xec0 [ 38.826268] vma_interval_tree_remove+0xc75/0xec0 [ 38.826874] vma_prepare+0xc54/0x11a0 [ 38.827359] __split_vma+0x5af/0x950 [ 38.827842] ? __pfx___split_vma+0x10/0x10 [ 38.828380] ? find_held_lock+0x2c/0x110 [ 38.828912] do_vmi_align_munmap+0x2ba/0x11f0 [ 38.829483] ? lock_is_held_type+0x9f/0x120 [ 38.830030] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 38.830644] ? mtree_range_walk+0x632/0x900 [ 38.831197] ? mas_walk+0x5c7/0x7c0 [ 38.831677] do_vmi_munmap+0x1f1/0x2b0 [ 38.832174] mmap_region+0x1f9/0x2660 [ 38.832672] ? vm_mmap_pgoff+0x15c/0x3a0 [ 38.833185] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 38.833914] ? __pfx_lock_acquire+0x10/0x10 [ 38.834449] ? __pfx_mmap_region+0x10/0x10 [ 38.834998] ? security_mmap_addr+0x7d/0xa0 [ 38.835533] ? get_unmapped_area+0x1f5/0x3f0 [ 38.836096] do_mmap+0x854/0xf00 [ 38.836556] vm_mmap_pgoff+0x1a6/0x3a0 [ 38.837054] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 38.837618] ksys_mmap_pgoff+0x3af/0x500 [ 38.838134] do_syscall_64+0x3f/0x90 [ 38.838625] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 38.839276] RIP: 0033:0x7ff019d69d82 [ 38.839733] 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 [ 38.841886] RSP: 002b:00007ffc985d3ad8 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 38.842795] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007ff019d69d82 [ 38.843653] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007ff0191a3000 [ 38.844508] RBP: 00007ff0191a3000 R08: 0000000000000009 R09: 0000000000001000 [ 38.845358] R10: 0000000000000812 R11: 0000000000000206 R12: 0000564a8b263ec0 [ 38.846207] R13: 00007ffc985d3af0 R14: 00007ffc985d3b20 R15: 00007ffc985d3e80 [ 38.847071] [ 38.847367] [ 38.847583] Allocated by task 212: [ 38.848014] kasan_save_stack+0x22/0x50 [ 38.848541] kasan_set_track+0x25/0x30 [ 38.849032] __kasan_slab_alloc+0x59/0x70 [ 38.849552] kmem_cache_alloc+0x16b/0x370 [ 38.850069] vm_area_dup+0x20/0x160 [ 38.850527] __split_vma+0x170/0x950 [ 38.850994] split_vma+0xc6/0x110 [ 38.851436] mprotect_fixup+0x8d2/0xb30 [ 38.851942] do_mprotect_pkey+0x87e/0xd40 [ 38.852481] __x64_sys_mprotect+0x78/0xc0 [ 38.853004] do_syscall_64+0x3f/0x90 [ 38.853482] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 38.854131] [ 38.854346] Freed by task 212: [ 38.854742] kasan_save_stack+0x22/0x50 [ 38.855379] kasan_set_track+0x25/0x30 [ 38.855879] kasan_save_free_info+0x2b/0x50 [ 38.856436] __kasan_slab_free+0x10a/0x190 [ 38.856979] kmem_cache_free+0x10d/0x4d0 [ 38.857488] rcu_core+0x8c8/0x2860 [ 38.857932] __do_softirq+0x1b7/0x7d4 [ 38.858409] [ 38.858630] Last potentially related work creation: [ 38.859219] kasan_save_stack+0x22/0x50 [ 38.859725] __kasan_record_aux_stack+0x8e/0xa0 [ 38.860316] __call_rcu_common.constprop.0+0x6a/0xb90 [ 38.860956] remove_vma+0x139/0x170 [ 38.861471] do_vmi_align_munmap+0xd4a/0x11f0 [ 38.862036] do_vmi_munmap+0x1f1/0x2b0 [ 38.862525] __vm_munmap+0x138/0x3a0 [ 38.862992] __x64_sys_munmap+0x59/0x80 [ 38.863488] do_syscall_64+0x3f/0x90 [ 38.863965] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 38.864634] [ 38.864847] The buggy address belongs to the object at ffff88800fbe3ae0 [ 38.864847] which belongs to the cache vm_area_struct of size 168 [ 38.866322] The buggy address is located 88 bytes inside of [ 38.866322] freed 168-byte region [ffff88800fbe3ae0, ffff88800fbe3b88) [ 38.867723] [ 38.867947] The buggy address belongs to the physical page: [ 38.868620] page:00000000dc5f4855 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xfbe3 [ 38.869696] memcg:ffff88800dfece01 [ 38.870126] flags: 0x100000000000200(slab|node=0|zone=1) [ 38.870771] page_type: 0xffffffff() [ 38.871230] raw: 0100000000000200 ffff8880087a0c80 dead000000000100 dead000000000122 [ 38.872155] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800dfece01 [ 38.873082] page dumped because: kasan: bad access detected [ 38.873752] [ 38.873974] Memory state around the buggy address: [ 38.874558] ffff88800fbe3a00: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 38.875405] ffff88800fbe3a80: 00 00 00 00 fc fc fc fc fc fc fc fc fa fb fb fb [ 38.876285] >ffff88800fbe3b00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 38.877136] ^ [ 38.877744] ffff88800fbe3b80: fb fc fc fc fc fc fc fc fc fa fb fb fb fb fb fb [ 38.878604] ffff88800fbe3c00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fc fc [ 38.879453] ================================================================== [ 38.880387] Disabling lock debugging due to kernel taint [ 41.257763] BUG: Bad rss-counter state mm:000000006a7bcf33 type:MM_FILEPAGES val:33 [ 41.258871] BUG: Bad rss-counter state mm:000000006a7bcf33 type:MM_ANONPAGES val:22 [ 41.703952] BUG: Bad rss-counter state mm:00000000c8fd8956 type:MM_FILEPAGES val:33 [ 41.704986] BUG: Bad rss-counter state mm:00000000c8fd8956 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:50434' (ECDSA) to the list of known hosts. 2023/06/20 15:52:01 fuzzer started 2023/06/20 15:52:01 dialing manager at localhost:36067 2023/06/20 15:52:01 checking machine... 2023/06/20 15:52:01 checking revisions... [ 42.431384] kmemleak: Automatic memory scanning thread ended 2023/06/20 15:52:02 testing simple program... [ 42.474028] cgroup: Unknown subsys name 'net' [ 42.534111] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 15:52:01 Registers: info registers vcpu 0 RAX=ffffffff83c112c0 RBX=ffffffff85fe4920 RCX=ffffffff83c1130b RDX=0000000000000000 RSI=ffffffff86412c12 RDI=ffffffff85fe4920 RBP=ffffffff85fe4924 RSP=ffff88806ce099e0 R8 =ffffffff86412c12 R9 =ffff88806ce09ad8 R10=0000000000038001 R11=000000000009a7d7 R12=ffffffff85fe4920 R13=ffffffff85fe4920 R14=ffffffff85fe4920 R15=dffffc0000000000 RIP=ffffffff8112fc4f RFL=00000206 [-----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 00007f2786cff700 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=00007f251e49a0b0 CR3=000000000fc18000 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=6d6f72662064657463656e6e6f637369 XMM02=2e303120746f6f722072657375206d6f XMM03=3a5d3832325b646873732031303a3235 XMM04=6456774875434142334f726f59427469 XMM05=485320415352203a3268737320323937 XMM06=206d6f726620746f6f7220726f662079 XMM07=00000000000000000000000000000000 XMM08=3a677562656420676f6c737973720000 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=ffff888015df0000 RBX=ffff88800f48f880 RCX=ffffffff81132ffe RDX=ffff88800f48f798 RSI=0000000000000000 RDI=ffff88800f48f858 RBP=ffff888015df0000 RSP=ffff88800f48f798 R8 =0000000000000004 R9 =0000000000000000 R10=ffff88800f48f7e8 R11=ffffffff81806f71 R12=0000000000000000 R13=ffff88800f48f810 R14=ffff88800f48f830 R15=ffff88800f48f7e8 RIP=ffffffff8113300c 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 00007f251dee2900 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=00007f251e499618 CR3=000000000e57a000 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