syzkaller login: [ 37.105192] BUG: Bad rss-counter state mm:000000009e77b2e1 type:MM_FILEPAGES val:33 [ 37.105976] BUG: Bad rss-counter state mm:000000009e77b2e1 type:MM_ANONPAGES val:22 [ 37.225374] ================================================================== [ 37.226042] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 37.226714] Read of size 8 at addr ffff88800fbf3b38 by task sshd/221 [ 37.227266] [ 37.227419] CPU: 0 PID: 221 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 37.228029] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 37.228727] Call Trace: [ 37.228942] [ 37.229138] dump_stack_lvl+0x91/0xf0 [ 37.229685] print_report+0xcc/0x620 [ 37.230020] ? __virt_addr_valid+0x102/0x340 [ 37.230393] ? vma_interval_tree_remove+0xc75/0xec0 [ 37.230809] ? vma_interval_tree_remove+0xc75/0xec0 [ 37.231211] kasan_report+0xbe/0xf0 [ 37.231555] ? vma_interval_tree_remove+0xc75/0xec0 [ 37.231942] vma_interval_tree_remove+0xc75/0xec0 [ 37.232361] vma_prepare+0xc54/0x11a0 [ 37.232672] __split_vma+0x5af/0x950 [ 37.232989] ? __pfx___split_vma+0x10/0x10 [ 37.233350] ? find_held_lock+0x2c/0x110 [ 37.233709] do_vmi_align_munmap+0x2ba/0x11f0 [ 37.234099] ? lock_is_held_type+0x9f/0x120 [ 37.234462] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 37.234879] ? mtree_range_walk+0x632/0x900 [ 37.235255] ? mas_walk+0x5c7/0x7c0 [ 37.235581] do_vmi_munmap+0x1f1/0x2b0 [ 37.235912] mmap_region+0x1f9/0x2660 [ 37.236257] ? vm_mmap_pgoff+0x15c/0x3a0 [ 37.236606] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 37.237073] ? __pfx_lock_acquire+0x10/0x10 [ 37.237427] ? __pfx_mmap_region+0x10/0x10 [ 37.237782] ? security_mmap_addr+0x7d/0xa0 [ 37.238131] ? get_unmapped_area+0x1f5/0x3f0 [ 37.238501] do_mmap+0x854/0xf00 [ 37.238795] vm_mmap_pgoff+0x1a6/0x3a0 [ 37.239121] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 37.239497] ksys_mmap_pgoff+0x3af/0x500 [ 37.239838] do_syscall_64+0x3f/0x90 [ 37.240197] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 37.240614] RIP: 0033:0x7f78eec8fd82 [ 37.240915] 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 [ 37.242307] RSP: 002b:00007ffc207bbce8 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 37.242912] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f78eec8fd82 [ 37.243474] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f78ee0c9000 [ 37.244028] RBP: 00007f78ee0c9000 R08: 0000000000000009 R09: 0000000000001000 [ 37.244615] R10: 0000000000000812 R11: 0000000000000206 R12: 0000559e5198fb20 [ 37.245187] R13: 00007ffc207bbd00 R14: 00007ffc207bbd30 R15: 00007ffc207bc090 [ 37.245753] [ 37.245944] [ 37.246091] Allocated by task 214: [ 37.246383] kasan_save_stack+0x22/0x50 [ 37.246720] kasan_set_track+0x25/0x30 [ 37.247048] __kasan_slab_alloc+0x59/0x70 [ 37.247399] kmem_cache_alloc+0x16b/0x370 [ 37.247738] vm_area_dup+0x20/0x160 [ 37.248038] __split_vma+0x170/0x950 [ 37.248386] split_vma+0xc6/0x110 [ 37.248674] mprotect_fixup+0x8d2/0xb30 [ 37.248999] do_mprotect_pkey+0x87e/0xd40 [ 37.249338] __x64_sys_mprotect+0x78/0xc0 [ 37.249690] do_syscall_64+0x3f/0x90 [ 37.249996] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 37.250416] [ 37.250561] Freed by task 19: [ 37.250808] kasan_save_stack+0x22/0x50 [ 37.251141] kasan_set_track+0x25/0x30 [ 37.251460] kasan_save_free_info+0x2b/0x50 [ 37.251825] __kasan_slab_free+0x10a/0x190 [ 37.252205] kmem_cache_free+0x10d/0x4d0 [ 37.252538] rcu_core+0x8c8/0x2860 [ 37.252836] __do_softirq+0x1b7/0x7d4 [ 37.253147] [ 37.253288] Last potentially related work creation: [ 37.253666] kasan_save_stack+0x22/0x50 [ 37.253994] __kasan_record_aux_stack+0x8e/0xa0 [ 37.254369] __call_rcu_common.constprop.0+0x6a/0xb90 [ 37.254796] remove_vma+0x139/0x170 [ 37.255100] do_vmi_align_munmap+0xd4a/0x11f0 [ 37.255474] do_vmi_munmap+0x1f1/0x2b0 [ 37.255784] __vm_munmap+0x138/0x3a0 [ 37.256090] __x64_sys_munmap+0x59/0x80 [ 37.256448] do_syscall_64+0x3f/0x90 [ 37.256755] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 37.257175] [ 37.257319] The buggy address belongs to the object at ffff88800fbf3ae0 [ 37.257319] which belongs to the cache vm_area_struct of size 168 [ 37.258258] The buggy address is located 88 bytes inside of [ 37.258258] freed 168-byte region [ffff88800fbf3ae0, ffff88800fbf3b88) [ 37.259166] [ 37.259307] The buggy address belongs to the physical page: [ 37.259736] page:00000000082f24ff refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xfbf3 [ 37.260464] memcg:ffff888017dee801 [ 37.260747] flags: 0x100000000000200(slab|node=0|zone=1) [ 37.261187] page_type: 0xffffffff() [ 37.261490] raw: 0100000000000200 ffff88800879fc80 dead000000000122 0000000000000000 [ 37.262109] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff888017dee801 [ 37.262715] page dumped because: kasan: bad access detected [ 37.263177] [ 37.263320] Memory state around the buggy address: [ 37.263713] ffff88800fbf3a00: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 37.264344] ffff88800fbf3a80: 00 00 00 00 fc fc fc fc fc fc fc fc fa fb fb fb [ 37.264920] >ffff88800fbf3b00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 37.265488] ^ [ 37.265901] ffff88800fbf3b80: fb fc fc fc fc fc fc fc fc fa fb fb fb fb fb fb [ 37.266473] ffff88800fbf3c00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fc fc [ 37.267033] ================================================================== [ 37.267845] Disabling lock debugging due to kernel taint [ 38.701199] BUG: Bad rss-counter state mm:000000002e736c26 type:MM_FILEPAGES val:33 [ 38.701893] BUG: Bad rss-counter state mm:000000002e736c26 type:MM_ANONPAGES val:22 [ 39.049280] BUG: Bad rss-counter state mm:0000000022314446 type:MM_FILEPAGES val:33 [ 39.050003] BUG: Bad rss-counter state mm:0000000022314446 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:54845' (ECDSA) to the list of known hosts. 2023/06/20 08:49:09 fuzzer started 2023/06/20 08:49:09 dialing manager at localhost:44161 2023/06/20 08:49:09 checking machine... 2023/06/20 08:49:09 checking revisions... [ 39.587150] kmemleak: Automatic memory scanning thread ended 2023/06/20 08:49:09 testing simple program... [ 39.629470] cgroup: Unknown subsys name 'net' [ 39.663468] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 08:49:02 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=00007fc4c952e9f8 CR3=000000000ee82000 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=4624e2e1af7b2e801b4ccf377c93a32d XMM02=2c67c8bc2e329bc3000000000011d8b0 XMM03=fb795ef6d65770560000000000124690 XMM04=1d27c6f0f318308a00000000000ae988 XMM05=e4cb8bb95a7664b60000000000134228 XMM06=e3ce636e9426959b0000000000133090 XMM07=e042d86d42eb936e0000000000124910 XMM08=29a29186eb4c1557000000000011d910 XMM09=00000000000000000000000000000000 XMM10=20200000000020202020202020200000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=dffffc0000000000 RBX=ffff88801c9efb78 RCX=0000000000000000 RDX=1ffff1100393df70 RSI=ffffffff844f1e3c RDI=ffff88801c9efb80 RBP=0000000000000000 RSP=ffff88801c9efae0 R8 =0000000000000005 R9 =0000000000000000 R10=0000000000000000 R11=0000000000000001 R12=ffff888008a78002 R13=ffff88801c9efb90 R14=0000000000000002 R15=0000000000000cc0 RIP=ffffffff844f1e5c 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 00007fca4ecc7900 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=00007ffef2714000 CR3=000000000e904000 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=ffffffffffffffffffff000000000000 XMM01=000000000000003635006b6f6c6c756e XMM02=62003d73646e756f7200323135616873 XMM03=5320444f4854454d5f54505952434e45 XMM04=40404040404040404040404040404040 XMM05=5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a XMM06=20202020202020202020202020202020 XMM07=00000000000000000000000000000000 XMM08=00000000000000000000000000202020 XMM09=ff0000ffffffffffff00000000ffffff XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000