syzkaller login: [ 32.775315] BUG: Bad rss-counter state mm:000000000ed805de type:MM_FILEPAGES val:33 [ 32.776602] BUG: Bad rss-counter state mm:000000000ed805de type:MM_ANONPAGES val:22 [ 32.814045] ================================================================== [ 32.815048] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 32.816006] Read of size 8 at addr ffff888019eaaa50 by task sshd/221 [ 32.816856] [ 32.817084] CPU: 0 PID: 221 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 32.817954] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 32.819028] Call Trace: [ 32.819350] [ 32.819636] dump_stack_lvl+0x91/0xf0 [ 32.820132] print_report+0xcc/0x620 [ 32.820610] ? __virt_addr_valid+0x102/0x340 [ 32.821160] ? vma_interval_tree_remove+0xc75/0xec0 [ 32.821773] ? vma_interval_tree_remove+0xc75/0xec0 [ 32.822412] kasan_report+0xbe/0xf0 [ 32.822901] ? vma_interval_tree_remove+0xc75/0xec0 [ 32.823532] vma_interval_tree_remove+0xc75/0xec0 [ 32.824143] vma_prepare+0xc54/0x11a0 [ 32.824619] __split_vma+0x5af/0x950 [ 32.825102] ? __pfx___split_vma+0x10/0x10 [ 32.825634] ? find_held_lock+0x2c/0x110 [ 32.826162] do_vmi_align_munmap+0x2ba/0x11f0 [ 32.826724] ? lock_is_held_type+0x9f/0x120 [ 32.827283] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 32.827884] ? mtree_range_walk+0x632/0x900 [ 32.828442] ? mas_walk+0x5c7/0x7c0 [ 32.828921] do_vmi_munmap+0x1f1/0x2b0 [ 32.829419] mmap_region+0x1f9/0x2660 [ 32.829905] ? vm_mmap_pgoff+0x15c/0x3a0 [ 32.830421] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 32.831164] ? __pfx_lock_acquire+0x10/0x10 [ 32.831707] ? __pfx_mmap_region+0x10/0x10 [ 32.832240] ? security_mmap_addr+0x7d/0xa0 [ 32.832772] ? get_unmapped_area+0x1f5/0x3f0 [ 32.833325] do_mmap+0x854/0xf00 [ 32.833772] vm_mmap_pgoff+0x1a6/0x3a0 [ 32.834271] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 32.834848] ksys_mmap_pgoff+0x3af/0x500 [ 32.835353] do_syscall_64+0x3f/0x90 [ 32.835835] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 32.836488] RIP: 0033:0x7f1f84a5bd82 [ 32.836944] 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 [ 32.839093] RSP: 002b:00007ffd5119be28 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 32.840001] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f1f84a5bd82 [ 32.840856] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f1f83e95000 [ 32.841706] RBP: 00007f1f83e95000 R08: 0000000000000009 R09: 0000000000001000 [ 32.842550] R10: 0000000000000812 R11: 0000000000000206 R12: 000055b9d8bf6ec0 [ 32.843409] R13: 00007ffd5119be40 R14: 00007ffd5119be70 R15: 00007ffd5119c1d0 [ 32.844276] [ 32.844570] [ 32.844783] Allocated by task 214: [ 32.845219] kasan_save_stack+0x22/0x50 [ 32.845724] kasan_set_track+0x25/0x30 [ 32.846219] __kasan_slab_alloc+0x59/0x70 [ 32.846739] kmem_cache_alloc+0x16b/0x370 [ 32.847260] vm_area_dup+0x20/0x160 [ 32.847723] __split_vma+0x170/0x950 [ 32.848195] split_vma+0xc6/0x110 [ 32.848638] mprotect_fixup+0x8d2/0xb30 [ 32.849141] do_mprotect_pkey+0x87e/0xd40 [ 32.849663] __x64_sys_mprotect+0x78/0xc0 [ 32.850191] do_syscall_64+0x3f/0x90 [ 32.850665] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 32.851322] [ 32.851539] Freed by task 19: [ 32.851925] kasan_save_stack+0x22/0x50 [ 32.852434] kasan_set_track+0x25/0x30 [ 32.852934] kasan_save_free_info+0x2b/0x50 [ 32.853471] __kasan_slab_free+0x10a/0x190 [ 32.854006] kmem_cache_free+0x10d/0x4d0 [ 32.854522] rcu_core+0x8c8/0x2860 [ 32.854977] __do_softirq+0x1b7/0x7d4 [ 32.855458] [ 32.855671] Last potentially related work creation: [ 32.856254] kasan_save_stack+0x22/0x50 [ 32.856759] __kasan_record_aux_stack+0x8e/0xa0 [ 32.857342] __call_rcu_common.constprop.0+0x6a/0xb90 [ 32.857989] remove_vma+0x139/0x170 [ 32.858439] do_vmi_align_munmap+0xd4a/0x11f0 [ 32.859022] do_vmi_munmap+0x1f1/0x2b0 [ 32.859512] __vm_munmap+0x138/0x3a0 [ 32.859990] __x64_sys_munmap+0x59/0x80 [ 32.860490] do_syscall_64+0x3f/0x90 [ 32.860971] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 32.861611] [ 32.861826] The buggy address belongs to the object at ffff888019eaa9f8 [ 32.861826] which belongs to the cache vm_area_struct of size 168 [ 32.863315] The buggy address is located 88 bytes inside of [ 32.863315] freed 168-byte region [ffff888019eaa9f8, ffff888019eaaaa0) [ 32.864731] [ 32.864948] The buggy address belongs to the physical page: [ 32.865629] page:000000009a726f02 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x19eaa [ 32.866745] memcg:ffff888019c39701 [ 32.867189] flags: 0x100000000000200(slab|node=0|zone=1) [ 32.867834] page_type: 0xffffffff() [ 32.868282] raw: 0100000000000200 ffff88800879fc80 dead000000000122 0000000000000000 [ 32.869208] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff888019c39701 [ 32.870123] page dumped because: kasan: bad access detected [ 32.870784] [ 32.871020] Memory state around the buggy address: [ 32.871613] ffff888019eaa900: fc fc 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 32.872469] ffff888019eaa980: 00 00 00 00 00 00 00 fc fc fc fc fc fc fc fc fa [ 32.873335] >ffff888019eaaa00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 32.874201] ^ [ 32.874916] ffff888019eaaa80: fb fb fb fb fc fc fc fc fc fc fc fc fa fb fb fb [ 32.875784] ffff888019eaab00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 32.876641] ================================================================== [ 32.877721] Disabling lock debugging due to kernel taint [ 34.712068] BUG: Bad rss-counter state mm:00000000209886b7 type:MM_FILEPAGES val:33 [ 34.712971] BUG: Bad rss-counter state mm:00000000209886b7 type:MM_ANONPAGES val:22 [ 35.143726] BUG: Bad rss-counter state mm:000000002664bc9f type:MM_FILEPAGES val:33 [ 35.144926] BUG: Bad rss-counter state mm:000000002664bc9f type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:16985' (ECDSA) to the list of known hosts. 2023/06/19 13:37:46 fuzzer started 2023/06/19 13:37:46 dialing manager at localhost:44161 2023/06/19 13:37:46 checking machine... 2023/06/19 13:37:46 checking revisions... [ 35.929778] kmemleak: Automatic memory scanning thread ended 2023/06/19 13:37:46 testing simple program... [ 35.985295] cgroup: Unknown subsys name 'net' [ 36.058411] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 13:37:44 Registers: info registers vcpu 0 RAX=ffffffff8180b155 RBX=ffffffff813ad420 RCX=0000000000000001 RDX=1ffff1100d9c135a RSI=ffff8880160ef860 RDI=ffffffff8180b155 RBP=ffff88806ce09ad0 RSP=ffff88806ce09a68 R8 =0000000000000001 R9 =ffff88806ce09ab8 R10=0000000000038001 R11=00000000000b5566 R12=ffff88806ce09b40 R13=0000000000000000 R14=ffff888015dd1b40 R15=ffff88800f696000 RIP=ffffffff811303b9 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 00007f13c0d71700 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=00007fd75bdcb0b0 CR3=000000000c582000 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=3a5d3033325b646873732036343a3733 XMM04=6456774875434142334f726f59427469 XMM05=485320415352203a3268737320343635 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=ffff88806cf35000 RBX=0000000000000001 RCX=ffffffff8450c50e RDX=ffffed100d9e6a01 RSI=0000000000000004 RDI=ffffffff812889a5 RBP=dffffc0000000000 RSP=ffff888008e27e70 R8 =0000000000000000 R9 =ffffed100d9e6a00 R10=ffff88806cf35003 R11=0000000000000001 R12=ffffffff85d3bed0 R13=1ffff110011c4fd3 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 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=00007efdb8af2aa0 CR3=000000000d59c000 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=795f0243dc98aea85240e9cfe10c82fe XMM02=000000000011db90ec2efd57dc4c00df XMM03=0000000000124970b4d5dbac220c0f0a XMM04=be3c6f4d63e442cf00000000000ae988 XMM05=99282d55ee8ddf7b0000000000135360 XMM06=c291bd5c70af25b90000000000134400 XMM07=e042d86d42eb936e0000000000124bf0 XMM08=b4d5dbac220c0f0a000000000011dbf0 XMM09=00000000000000000000000000000000 XMM10=20200000000020202020202020200000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000