syzkaller login: [ 33.543590] BUG: Bad rss-counter state mm:000000007a271739 type:MM_FILEPAGES val:33 [ 33.544192] BUG: Bad rss-counter state mm:000000007a271739 type:MM_ANONPAGES val:22 [ 33.649337] ================================================================== [ 33.650021] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 33.650737] Read of size 8 at addr ffff88800dd84310 by task sshd/219 [ 33.651308] [ 33.651471] CPU: 0 PID: 219 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 33.652119] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 33.652850] Call Trace: [ 33.653093] [ 33.653305] dump_stack_lvl+0x91/0xf0 [ 33.653673] print_report+0xcc/0x620 [ 33.654034] ? __virt_addr_valid+0x102/0x340 [ 33.654454] ? vma_interval_tree_remove+0xc75/0xec0 [ 33.654930] ? vma_interval_tree_remove+0xc75/0xec0 [ 33.655391] kasan_report+0xbe/0xf0 [ 33.655751] ? vma_interval_tree_remove+0xc75/0xec0 [ 33.656227] vma_interval_tree_remove+0xc75/0xec0 [ 33.656683] vma_prepare+0xc54/0x11a0 [ 33.657044] __split_vma+0x5af/0x950 [ 33.657407] ? __pfx___split_vma+0x10/0x10 [ 33.657808] ? find_held_lock+0x2c/0x110 [ 33.658207] do_vmi_align_munmap+0x2ba/0x11f0 [ 33.658655] ? lock_is_held_type+0x9f/0x120 [ 33.659063] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 33.659470] ? mtree_range_walk+0x632/0x900 [ 33.659780] ? mas_walk+0x5c7/0x7c0 [ 33.660047] do_vmi_munmap+0x1f1/0x2b0 [ 33.660323] mmap_region+0x1f9/0x2660 [ 33.660591] ? vm_mmap_pgoff+0x15c/0x3a0 [ 33.660877] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 33.661280] ? __pfx_lock_acquire+0x10/0x10 [ 33.661581] ? __pfx_mmap_region+0x10/0x10 [ 33.661874] ? security_mmap_addr+0x7d/0xa0 [ 33.662175] ? get_unmapped_area+0x1f5/0x3f0 [ 33.662484] do_mmap+0x854/0xf00 [ 33.662738] vm_mmap_pgoff+0x1a6/0x3a0 [ 33.663020] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 33.663331] ksys_mmap_pgoff+0x3af/0x500 [ 33.663611] do_syscall_64+0x3f/0x90 [ 33.663877] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 33.664238] RIP: 0033:0x7ff1c145cd82 [ 33.664501] 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 [ 33.665696] RSP: 002b:00007fff0b78f1f8 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 33.666196] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007ff1c145cd82 [ 33.666675] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007ff1c0896000 [ 33.667149] RBP: 00007ff1c0896000 R08: 0000000000000009 R09: 0000000000001000 [ 33.667624] R10: 0000000000000812 R11: 0000000000000206 R12: 0000565120f00ec0 [ 33.668098] R13: 00007fff0b78f210 R14: 00007fff0b78f240 R15: 00007fff0b78f5a0 [ 33.668581] [ 33.668743] [ 33.668863] Allocated by task 212: [ 33.669101] kasan_save_stack+0x22/0x50 [ 33.669384] kasan_set_track+0x25/0x30 [ 33.669656] __kasan_slab_alloc+0x59/0x70 [ 33.669946] kmem_cache_alloc+0x16b/0x370 [ 33.670239] vm_area_dup+0x20/0x160 [ 33.670496] __split_vma+0x170/0x950 [ 33.670767] split_vma+0xc6/0x110 [ 33.671012] mprotect_fixup+0x8d2/0xb30 [ 33.671291] do_mprotect_pkey+0x87e/0xd40 [ 33.671584] __x64_sys_mprotect+0x78/0xc0 [ 33.671876] do_syscall_64+0x3f/0x90 [ 33.672138] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 33.672495] [ 33.672613] Freed by task 212: [ 33.672831] kasan_save_stack+0x22/0x50 [ 33.673120] kasan_set_track+0x25/0x30 [ 33.673398] kasan_save_free_info+0x2b/0x50 [ 33.673695] __kasan_slab_free+0x10a/0x190 [ 33.673997] kmem_cache_free+0x10d/0x4d0 [ 33.674283] rcu_core+0x8c8/0x2860 [ 33.674533] __do_softirq+0x1b7/0x7d4 [ 33.674809] [ 33.674929] Last potentially related work creation: [ 33.675256] kasan_save_stack+0x22/0x50 [ 33.675532] __kasan_record_aux_stack+0x8e/0xa0 [ 33.675853] __call_rcu_common.constprop.0+0x6a/0xb90 [ 33.676217] remove_vma+0x139/0x170 [ 33.676471] do_vmi_align_munmap+0xd4a/0x11f0 [ 33.676784] do_vmi_munmap+0x1f1/0x2b0 [ 33.677053] __vm_munmap+0x138/0x3a0 [ 33.677309] __x64_sys_munmap+0x59/0x80 [ 33.677583] do_syscall_64+0x3f/0x90 [ 33.677845] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 33.678202] [ 33.678321] Second to last potentially related work creation: [ 33.678718] kasan_save_stack+0x22/0x50 [ 33.678996] __kasan_record_aux_stack+0x8e/0xa0 [ 33.679314] __call_rcu_common.constprop.0+0x6a/0xb90 [ 33.679670] remove_vma+0x139/0x170 [ 33.679920] do_vmi_align_munmap+0xd4a/0x11f0 [ 33.680231] do_vmi_munmap+0x1f1/0x2b0 [ 33.680500] mmap_region+0x1f9/0x2660 [ 33.680765] do_mmap+0x854/0xf00 [ 33.681008] vm_mmap_pgoff+0x1a6/0x3a0 [ 33.681278] ksys_mmap_pgoff+0x3af/0x500 [ 33.681553] do_syscall_64+0x3f/0x90 [ 33.681815] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 33.682172] [ 33.682291] The buggy address belongs to the object at ffff88800dd842b8 [ 33.682291] which belongs to the cache vm_area_struct of size 168 [ 33.683115] The buggy address is located 88 bytes inside of [ 33.683115] freed 168-byte region [ffff88800dd842b8, ffff88800dd84360) [ 33.683896] [ 33.684017] The buggy address belongs to the physical page: [ 33.684383] page:00000000fc3012be refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xdd84 [ 33.684989] memcg:ffff888010028201 [ 33.685225] flags: 0x100000000000200(slab|node=0|zone=1) [ 33.685585] page_type: 0xffffffff() [ 33.685837] raw: 0100000000000200 ffff88800879fc80 ffffea00003c4f80 dead000000000004 [ 33.686346] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff888010028201 [ 33.686848] page dumped because: kasan: bad access detected [ 33.687213] [ 33.687334] Memory state around the buggy address: [ 33.687649] ffff88800dd84200: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 fc [ 33.688135] ffff88800dd84280: fc fc fc fc fc fc fc fa fb fb fb fb fb fb fb fb [ 33.688608] >ffff88800dd84300: fb fb fb fb fb fb fb fb fb fb fb fb fc fc fc fc [ 33.689085] ^ [ 33.689340] ffff88800dd84380: fc fc fc fc 00 00 00 00 00 00 00 00 00 00 00 00 [ 33.689818] ffff88800dd84400: 00 00 00 00 00 00 00 00 00 fc fc fc fc fc fc fc [ 33.690292] ================================================================== [ 33.691110] Disabling lock debugging due to kernel taint [ 35.921684] BUG: Bad rss-counter state mm:000000002f49edb4 type:MM_FILEPAGES val:33 [ 35.922768] BUG: Bad rss-counter state mm:000000002f49edb4 type:MM_ANONPAGES val:22 [ 36.332950] BUG: Bad rss-counter state mm:00000000ddac227c type:MM_FILEPAGES val:33 [ 36.334354] BUG: Bad rss-counter state mm:00000000ddac227c type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:26502' (ECDSA) to the list of known hosts. 2023/06/19 22:54:04 fuzzer started 2023/06/19 22:54:04 dialing manager at localhost:44161 2023/06/19 22:54:04 checking machine... 2023/06/19 22:54:04 checking revisions... [ 37.012819] kmemleak: Automatic memory scanning thread ended 2023/06/19 22:54:04 testing simple program... [ 37.065359] cgroup: Unknown subsys name 'net' [ 37.103626] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 22:53:59 Registers: info registers vcpu 0 RAX=ffff88806ce35000 RBX=0000000000000000 RCX=ffffffff8450c50e RDX=ffffed100d9c6a01 RSI=0000000000000004 RDI=ffffffff812889a5 RBP=dffffc0000000000 RSP=ffffffff85407e10 R8 =0000000000000000 R9 =ffffed100d9c6a00 R10=ffff88806ce35003 R11=ffff888008c58000 R12=ffffffff85d3bed0 R13=1ffffffff0a80fc7 R14=0000000000000000 R15=0000000000000000 RIP=ffffffff8450d49f 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=00007ffd3309d608 CR3=000000000e070000 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=2034303a34353a3232203931206e754a XMM01=657463656e6e6f63736944203a5d3932 XMM02=302e303120746f6f722072657375206d XMM03=203a5d3932325b646873732072656c6c XMM04=69662068637573206f4e203a656c6163 XMM05=3a656c696620766e65206e65706f206f XMM06=65733a6468737328766e655f6d617020 XMM07=6b7a79732033303a34353a3232203931 XMM08=3d656e696c646d632022656369767265 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=0000000000000000 RBX=00007ffe3bf39000 RCX=0000000000000000 RDX=ffff888019941b40 RSI=ffffffff817f5893 RDI=ffff88800e1535e8 RBP=ffff88800e153570 RSP=ffff888015c17cd0 R8 =0000000000000000 R9 =0000000000000000 R10=0000000000000001 R11=0000000000000000 R12=0000000000000000 R13=00007ffe3bf39000 R14=0000000000000000 R15=ffff888009468ef8 RIP=ffffffff814c081b 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 =0000 0000000000000000 00000000 00000000 DS =0000 0000000000000000 00000000 00000000 FS =0000 00007fe8d1561900 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=00007ffe3bf39d3c CR3=00000000094b4000 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=00000000000000000000000000000000 XMM02=2c8c72a9a921fcd9dbc1eb68d3af26db XMM03=51a725da7680255f1ec3703cac27beba XMM04=85920b1cc21d92ac271644f780e49a92 XMM05=00000000000000000000000000000000 XMM06=51920b1c761d255f1e16443c80279a92 XMM07=672065736f6c635f6e6f69737365733a XMM08=652075253d64692073253d706f000000 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000