syzkaller login: [ 30.172380] BUG: Bad rss-counter state mm:000000005a366612 type:MM_FILEPAGES val:33 [ 30.174068] BUG: Bad rss-counter state mm:000000005a366612 type:MM_ANONPAGES val:22 [ 30.339079] ================================================================== [ 30.340011] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 30.340960] Read of size 8 at addr ffff88801a1935c8 by task sshd/220 [ 30.341728] [ 30.341940] CPU: 1 PID: 220 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 30.342979] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 30.343955] Call Trace: [ 30.344298] [ 30.344600] dump_stack_lvl+0x91/0xf0 [ 30.345106] print_report+0xcc/0x620 [ 30.345590] ? __virt_addr_valid+0x102/0x340 [ 30.346148] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.346775] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.347393] kasan_report+0xbe/0xf0 [ 30.347871] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.348497] vma_interval_tree_remove+0xc75/0xec0 [ 30.349099] vma_prepare+0xc54/0x11a0 [ 30.349581] __split_vma+0x5af/0x950 [ 30.350054] ? __pfx___split_vma+0x10/0x10 [ 30.350581] ? find_held_lock+0x2c/0x110 [ 30.351104] do_vmi_align_munmap+0x2ba/0x11f0 [ 30.351668] ? lock_is_held_type+0x9f/0x120 [ 30.352209] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 30.352834] ? mtree_range_walk+0x632/0x900 [ 30.353393] ? mas_walk+0x5c7/0x7c0 [ 30.353871] do_vmi_munmap+0x1f1/0x2b0 [ 30.354367] mmap_region+0x1f9/0x2660 [ 30.354859] ? vm_mmap_pgoff+0x15c/0x3a0 [ 30.355376] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 30.356087] ? __pfx_lock_acquire+0x10/0x10 [ 30.356643] ? __pfx_mmap_region+0x10/0x10 [ 30.357172] ? security_mmap_addr+0x7d/0xa0 [ 30.357708] ? get_unmapped_area+0x1f5/0x3f0 [ 30.358258] do_mmap+0x854/0xf00 [ 30.358696] vm_mmap_pgoff+0x1a6/0x3a0 [ 30.359189] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 30.359756] ksys_mmap_pgoff+0x3af/0x500 [ 30.360307] do_syscall_64+0x3f/0x90 [ 30.360824] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.361474] RIP: 0033:0x7f539e1e4d82 [ 30.361932] 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 [ 30.364033] RSP: 002b:00007ffc8198d4a8 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 30.364963] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f539e1e4d82 [ 30.365802] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f539d61e000 [ 30.366637] RBP: 00007f539d61e000 R08: 0000000000000009 R09: 0000000000001000 [ 30.367465] R10: 0000000000000812 R11: 0000000000000206 R12: 000055f0969a0ec0 [ 30.368303] R13: 00007ffc8198d4c0 R14: 00007ffc8198d4f0 R15: 00007ffc8198d850 [ 30.369150] [ 30.369442] [ 30.369655] Allocated by task 213: [ 30.370076] kasan_save_stack+0x22/0x50 [ 30.370584] kasan_set_track+0x25/0x30 [ 30.371076] __kasan_slab_alloc+0x59/0x70 [ 30.371600] kmem_cache_alloc+0x16b/0x370 [ 30.372115] vm_area_dup+0x20/0x160 [ 30.372580] __split_vma+0x170/0x950 [ 30.373047] split_vma+0xc6/0x110 [ 30.373494] mprotect_fixup+0x8d2/0xb30 [ 30.373997] do_mprotect_pkey+0x87e/0xd40 [ 30.374519] __x64_sys_mprotect+0x78/0xc0 [ 30.375041] do_syscall_64+0x3f/0x90 [ 30.375516] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.376162] [ 30.376395] Freed by task 213: [ 30.376793] kasan_save_stack+0x22/0x50 [ 30.377295] kasan_set_track+0x25/0x30 [ 30.377793] kasan_save_free_info+0x2b/0x50 [ 30.378335] __kasan_slab_free+0x10a/0x190 [ 30.378868] kmem_cache_free+0x10d/0x4d0 [ 30.379383] rcu_core+0x8c8/0x2860 [ 30.379826] __do_softirq+0x1b7/0x7d4 [ 30.380321] [ 30.380537] Last potentially related work creation: [ 30.381119] kasan_save_stack+0x22/0x50 [ 30.381622] __kasan_record_aux_stack+0x8e/0xa0 [ 30.382199] __call_rcu_common.constprop.0+0x6a/0xb90 [ 30.382840] remove_vma+0x139/0x170 [ 30.383291] do_vmi_align_munmap+0xd4a/0x11f0 [ 30.383953] do_vmi_munmap+0x1f1/0x2b0 [ 30.384456] __vm_munmap+0x138/0x3a0 [ 30.384924] __x64_sys_munmap+0x59/0x80 [ 30.385423] do_syscall_64+0x3f/0x90 [ 30.385898] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.386541] [ 30.386756] The buggy address belongs to the object at ffff88801a193570 [ 30.386756] which belongs to the cache vm_area_struct of size 168 [ 30.388206] The buggy address is located 88 bytes inside of [ 30.388206] freed 168-byte region [ffff88801a193570, ffff88801a193618) [ 30.389617] [ 30.389832] The buggy address belongs to the physical page: [ 30.390497] page:00000000a15ffc84 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x1a193 [ 30.391591] memcg:ffff88800ed7fa01 [ 30.392014] flags: 0x100000000000200(slab|node=0|zone=1) [ 30.392680] page_type: 0xffffffff() [ 30.393130] raw: 0100000000000200 ffff8880087a0c80 dead000000000122 0000000000000000 [ 30.394052] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800ed7fa01 [ 30.394964] page dumped because: kasan: bad access detected [ 30.395625] [ 30.395845] Memory state around the buggy address: [ 30.396440] ffff88801a193480: fc 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 30.397293] ffff88801a193500: 00 00 00 00 00 00 fc fc fc fc fc fc fc fc fa fb [ 30.398142] >ffff88801a193580: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 30.398999] ^ [ 30.399665] ffff88801a193600: fb fb fb fc fc fc fc fc fc fc fc fa fb fb fb fb [ 30.400534] ffff88801a193680: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 30.401385] ================================================================== [ 30.402368] Disabling lock debugging due to kernel taint [ 33.367634] BUG: Bad rss-counter state mm:000000004a9587e4 type:MM_FILEPAGES val:33 [ 33.368801] BUG: Bad rss-counter state mm:000000004a9587e4 type:MM_ANONPAGES val:22 [ 33.760427] BUG: Bad rss-counter state mm:000000000540d1e1 type:MM_FILEPAGES val:33 [ 33.761571] BUG: Bad rss-counter state mm:000000000540d1e1 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:32913' (ECDSA) to the list of known hosts. 2023/06/20 22:22:49 fuzzer started 2023/06/20 22:22:49 dialing manager at localhost:36067 2023/06/20 22:22:49 checking machine... 2023/06/20 22:22:49 checking revisions... [ 34.486210] kmemleak: Automatic memory scanning thread ended 2023/06/20 22:22:49 testing simple program... [ 34.543000] cgroup: Unknown subsys name 'net' [ 34.583135] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 22:22:49 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=00007f343ac0b150 CR3=000000000e36e000 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=2039343a32323a3232203032206e754a XMM01=6964206465766965636552203a5d3932 XMM02=6f63736964203a31313a323036323520 XMM03=7266207463656e6e6f63736964206465 XMM04=69662068637573206f4e203a656c6163 XMM05=3a656c696620766e65206e65706f206f XMM06=65733a6468737328766e655f6d617020 XMM07=6b7a79732038343a32323a3232203032 XMM08=3d656e696c646d632022656369767265 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=0000000000000000 RBX=0000000000000040 RCX=ffffffff8363630a RDX=ffff888015e30000 RSI=0000000000000000 RDI=0000000000000000 RBP=ffff88800e81fe60 RSP=ffff88800e81fb48 R8 =0000000000000005 R9 =0000000000000000 R10=0000000000000040 R11=00000000000b6a61 R12=0000000000000053 R13=0000000000000000 R14=0000000000000040 R15=0000000000000000 RIP=ffffffff814c0438 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 00007f0f65866700 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=00007f78817f50b0 CR3=000000000e36e000 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=6d6f72662064657463656e6e6f637369 XMM02=2e303120746f6f722072657375206d6f XMM03=3a5d3932325b646873732039343a3232 XMM04=6456774875434142334f726f59427469 XMM05=485320415352203a3268737320323036 XMM06=206d6f726620746f6f7220726f662079 XMM07=00000000000000000000000000000000 XMM08=3a677562656420676f6c737973720000 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000