syzkaller login: [ 31.916902] BUG: Bad rss-counter state mm:000000003f9afbae type:MM_FILEPAGES val:33 [ 31.917925] BUG: Bad rss-counter state mm:000000003f9afbae type:MM_ANONPAGES val:22 [ 32.086405] ================================================================== [ 32.087496] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 32.088610] Read of size 8 at addr ffff88801a323ed8 by task sshd/219 [ 32.089635] [ 32.089853] CPU: 1 PID: 219 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 32.090717] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 32.091703] Call Trace: [ 32.092021] [ 32.092311] dump_stack_lvl+0x91/0xf0 [ 32.092798] print_report+0xcc/0x620 [ 32.093280] ? __virt_addr_valid+0x102/0x340 [ 32.093830] ? vma_interval_tree_remove+0xc75/0xec0 [ 32.094439] ? vma_interval_tree_remove+0xc75/0xec0 [ 32.095072] kasan_report+0xbe/0xf0 [ 32.095548] ? vma_interval_tree_remove+0xc75/0xec0 [ 32.096194] vma_interval_tree_remove+0xc75/0xec0 [ 32.096829] vma_prepare+0xc54/0x11a0 [ 32.097324] __split_vma+0x5af/0x950 [ 32.097830] ? __pfx___split_vma+0x10/0x10 [ 32.098386] ? find_held_lock+0x2c/0x110 [ 32.098948] do_vmi_align_munmap+0x2ba/0x11f0 [ 32.099535] ? lock_is_held_type+0x9f/0x120 [ 32.100107] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 32.100738] ? mtree_range_walk+0x632/0x900 [ 32.101323] ? mas_walk+0x5c7/0x7c0 [ 32.101821] do_vmi_munmap+0x1f1/0x2b0 [ 32.102340] mmap_region+0x1f9/0x2660 [ 32.102856] ? vm_mmap_pgoff+0x15c/0x3a0 [ 32.103394] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 32.104136] ? __pfx_lock_acquire+0x10/0x10 [ 32.104695] ? __pfx_mmap_region+0x10/0x10 [ 32.105258] ? security_mmap_addr+0x7d/0xa0 [ 32.105814] ? get_unmapped_area+0x1f5/0x3f0 [ 32.106388] do_mmap+0x854/0xf00 [ 32.106861] vm_mmap_pgoff+0x1a6/0x3a0 [ 32.107384] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 32.107969] ksys_mmap_pgoff+0x3af/0x500 [ 32.108493] do_syscall_64+0x3f/0x90 [ 32.108995] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 32.109674] RIP: 0033:0x7f12d9db2d82 [ 32.110153] 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 [ 32.112396] RSP: 002b:00007ffdff9360a8 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 32.113354] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f12d9db2d82 [ 32.114242] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f12d91ec000 [ 32.115142] RBP: 00007f12d91ec000 R08: 0000000000000009 R09: 0000000000001000 [ 32.116041] R10: 0000000000000812 R11: 0000000000000206 R12: 000055578ab5ff70 [ 32.116926] R13: 00007ffdff9360c0 R14: 00007ffdff9360f0 R15: 00007ffdff936450 [ 32.117825] [ 32.118126] [ 32.118348] Allocated by task 212: [ 32.118815] kasan_save_stack+0x22/0x50 [ 32.119350] kasan_set_track+0x25/0x30 [ 32.119863] __kasan_slab_alloc+0x59/0x70 [ 32.120402] kmem_cache_alloc+0x16b/0x370 [ 32.120934] vm_area_dup+0x20/0x160 [ 32.121408] __split_vma+0x170/0x950 [ 32.121894] split_vma+0xc6/0x110 [ 32.122350] mprotect_fixup+0x8d2/0xb30 [ 32.122882] do_mprotect_pkey+0x87e/0xd40 [ 32.123422] __x64_sys_mprotect+0x78/0xc0 [ 32.123966] do_syscall_64+0x3f/0x90 [ 32.124462] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 32.125140] [ 32.125364] Freed by task 212: [ 32.125772] kasan_save_stack+0x22/0x50 [ 32.126299] kasan_set_track+0x25/0x30 [ 32.126831] kasan_save_free_info+0x2b/0x50 [ 32.127390] __kasan_slab_free+0x10a/0x190 [ 32.127955] kmem_cache_free+0x10d/0x4d0 [ 32.128482] rcu_core+0x8c8/0x2860 [ 32.128949] __do_softirq+0x1b7/0x7d4 [ 32.129443] [ 32.129665] Last potentially related work creation: [ 32.130341] kasan_save_stack+0x22/0x50 [ 32.130886] __kasan_record_aux_stack+0x8e/0xa0 [ 32.131482] __call_rcu_common.constprop.0+0x6a/0xb90 [ 32.132155] remove_vma+0x139/0x170 [ 32.132627] do_vmi_align_munmap+0xd4a/0x11f0 [ 32.133204] do_vmi_munmap+0x1f1/0x2b0 [ 32.133707] __vm_munmap+0x138/0x3a0 [ 32.134195] __x64_sys_munmap+0x59/0x80 [ 32.134719] do_syscall_64+0x3f/0x90 [ 32.135217] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 32.135890] [ 32.136113] The buggy address belongs to the object at ffff88801a323e80 [ 32.136113] which belongs to the cache vm_area_struct of size 168 [ 32.137659] The buggy address is located 88 bytes inside of [ 32.137659] freed 168-byte region [ffff88801a323e80, ffff88801a323f28) [ 32.139157] [ 32.139379] The buggy address belongs to the physical page: [ 32.140071] page:00000000cdcf59f7 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x1a323 [ 32.141222] memcg:ffff88800fd96c01 [ 32.141672] flags: 0x100000000000200(slab|node=0|zone=1) [ 32.142347] page_type: 0xffffffff() [ 32.142823] raw: 0100000000000200 ffff88800879fc80 dead000000000122 0000000000000000 [ 32.144089] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800fd96c01 [ 32.145333] page dumped because: kasan: bad access detected [ 32.146239] [ 32.146527] Memory state around the buggy address: [ 32.147340] ffff88801a323d80: fc fc fc 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 32.148449] ffff88801a323e00: 00 00 00 00 00 00 00 00 fc fc fc fc fc fc fc fc [ 32.149353] >ffff88801a323e80: fa fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 32.150240] ^ [ 32.151022] ffff88801a323f00: fb fb fb fb fb fc fc fc fc fc fc fc fc fc fc fc [ 32.151915] ffff88801a323f80: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc [ 32.152801] ================================================================== [ 32.153889] Disabling lock debugging due to kernel taint [ 34.644788] BUG: Bad rss-counter state mm:000000003de24b0b type:MM_FILEPAGES val:33 [ 34.645966] BUG: Bad rss-counter state mm:000000003de24b0b type:MM_ANONPAGES val:22 [ 35.099596] BUG: Bad rss-counter state mm:00000000f5d76766 type:MM_FILEPAGES val:33 [ 35.100775] BUG: Bad rss-counter state mm:00000000f5d76766 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:2149' (ECDSA) to the list of known hosts. 2023/06/20 02:36:21 fuzzer started 2023/06/20 02:36:21 dialing manager at localhost:44161 2023/06/20 02:36:21 checking machine... 2023/06/20 02:36:21 checking revisions... [ 35.724156] kmemleak: Automatic memory scanning thread ended 2023/06/20 02:36:22 testing simple program... [ 35.773233] cgroup: Unknown subsys name 'net' [ 35.835175] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 02:36:20 Registers: info registers vcpu 0 RAX=0000000080000000 RBX=0000000000000000 RCX=0000000080000000 RDX=ffff888016521b40 RSI=ffffffff814c84fa RDI=0000000000000005 RBP=0000000000000000 RSP=ffff8880164374b0 R8 =0000000000000005 R9 =0000000000000000 R10=0000000000000000 R11=00000000000b6996 R12=0000000000000000 R13=0000000000000000 R14=ffffffff85652988 R15=0000000000000d40 RIP=ffffffff814c07f1 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 00007f68ef8f0700 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=00007f92651d7618 CR3=000000000963a000 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=2031323a36333a3230203032206e754a XMM01=73732878696e755f6d6170203a5d3832 XMM02=65736f6c63206e6f6973736573203a29 XMM03=755f6d6170203a5d3832325b64687373 XMM04=69662068637573206f4e203a656c6163 XMM05=3a656c696620766e65206e65706f206f XMM06=65733a6468737328766e655f6d617020 XMM07=6b7a79732031323a36333a3230203032 XMM08=3d656e696c646d632022656369767265 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=00007fe6a1c30658 CR3=000000000d85c000 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=94ffb374273ec8b3534ef3e7d8cb4ee1 XMM02=2c67c8bc2e329bc3000000000011c4e0 XMM03=fb795ef6d65770560000000000123a20 XMM04=7bf815a05e32920300000000000ae988 XMM05=dfcdbad4f1609c3700000000001335f0 XMM06=806171799158d9670000000000133478 XMM07=e042d86d42eb936e0000000000123ca0 XMM08=2a680a7ed1d31c04000000000011c540 XMM09=00000000000000000000000000000000 XMM10=20200000000020202020202020200000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000