syzkaller login: [ 30.949990] BUG: Bad rss-counter state mm:000000000205fa92 type:MM_FILEPAGES val:33 [ 30.951212] BUG: Bad rss-counter state mm:000000000205fa92 type:MM_ANONPAGES val:22 [ 31.104661] ================================================================== [ 31.105567] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 31.106507] Read of size 8 at addr ffff888016988140 by task sshd/220 [ 31.107293] [ 31.107514] CPU: 1 PID: 220 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 31.108556] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 31.109534] Call Trace: [ 31.109849] [ 31.110131] dump_stack_lvl+0x91/0xf0 [ 31.110662] print_report+0xcc/0x620 [ 31.111139] ? __virt_addr_valid+0x102/0x340 [ 31.111700] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.112321] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.112938] kasan_report+0xbe/0xf0 [ 31.113412] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.114041] vma_interval_tree_remove+0xc75/0xec0 [ 31.114659] vma_prepare+0xc54/0x11a0 [ 31.115153] __split_vma+0x5af/0x950 [ 31.115655] ? __pfx___split_vma+0x10/0x10 [ 31.116199] ? find_held_lock+0x2c/0x110 [ 31.116742] do_vmi_align_munmap+0x2ba/0x11f0 [ 31.117327] ? lock_is_held_type+0x9f/0x120 [ 31.117889] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 31.118518] ? mtree_range_walk+0x632/0x900 [ 31.119092] ? mas_walk+0x5c7/0x7c0 [ 31.119596] do_vmi_munmap+0x1f1/0x2b0 [ 31.120109] mmap_region+0x1f9/0x2660 [ 31.120609] ? vm_mmap_pgoff+0x15c/0x3a0 [ 31.121154] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 31.121896] ? __pfx_lock_acquire+0x10/0x10 [ 31.122450] ? __pfx_mmap_region+0x10/0x10 [ 31.123005] ? security_mmap_addr+0x7d/0xa0 [ 31.123571] ? get_unmapped_area+0x1f5/0x3f0 [ 31.124152] do_mmap+0x854/0xf00 [ 31.124612] vm_mmap_pgoff+0x1a6/0x3a0 [ 31.125123] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 31.125708] ksys_mmap_pgoff+0x3af/0x500 [ 31.126232] do_syscall_64+0x3f/0x90 [ 31.126732] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.127416] RIP: 0033:0x7f344d13bd82 [ 31.127895] 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 [ 31.130115] RSP: 002b:00007ffff8a1bb38 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 31.131057] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f344d13bd82 [ 31.131944] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f344c575000 [ 31.132828] RBP: 00007f344c575000 R08: 0000000000000009 R09: 0000000000001000 [ 31.133713] R10: 0000000000000812 R11: 0000000000000206 R12: 00005640429f1b20 [ 31.134605] R13: 00007ffff8a1bb50 R14: 00007ffff8a1bb80 R15: 00007ffff8a1bee0 [ 31.135504] [ 31.135806] [ 31.136028] Allocated by task 213: [ 31.136470] kasan_save_stack+0x22/0x50 [ 31.136997] kasan_set_track+0x25/0x30 [ 31.137516] __kasan_slab_alloc+0x59/0x70 [ 31.138060] kmem_cache_alloc+0x16b/0x370 [ 31.138599] vm_area_dup+0x20/0x160 [ 31.139072] __split_vma+0x170/0x950 [ 31.139571] split_vma+0xc6/0x110 [ 31.140026] mprotect_fixup+0x8d2/0xb30 [ 31.140544] do_mprotect_pkey+0x87e/0xd40 [ 31.141087] __x64_sys_mprotect+0x78/0xc0 [ 31.141624] do_syscall_64+0x3f/0x90 [ 31.142115] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.142786] [ 31.143007] Freed by task 213: [ 31.143417] kasan_save_stack+0x22/0x50 [ 31.143933] kasan_set_track+0x25/0x30 [ 31.144448] kasan_save_free_info+0x2b/0x50 [ 31.145003] __kasan_slab_free+0x10a/0x190 [ 31.145555] kmem_cache_free+0x10d/0x4d0 [ 31.146089] rcu_core+0x8c8/0x2860 [ 31.146550] __do_softirq+0x1b7/0x7d4 [ 31.147046] [ 31.147286] Last potentially related work creation: [ 31.147893] kasan_save_stack+0x22/0x50 [ 31.148412] __kasan_record_aux_stack+0x8e/0xa0 [ 31.149008] __call_rcu_common.constprop.0+0x6a/0xb90 [ 31.149758] remove_vma+0x139/0x170 [ 31.150227] do_vmi_align_munmap+0xd4a/0x11f0 [ 31.150815] do_vmi_munmap+0x1f1/0x2b0 [ 31.151321] __vm_munmap+0x138/0x3a0 [ 31.151806] __x64_sys_munmap+0x59/0x80 [ 31.152321] do_syscall_64+0x3f/0x90 [ 31.152812] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.153479] [ 31.153700] The buggy address belongs to the object at ffff8880169880e8 [ 31.153700] which belongs to the cache vm_area_struct of size 168 [ 31.155236] The buggy address is located 88 bytes inside of [ 31.155236] freed 168-byte region [ffff8880169880e8, ffff888016988190) [ 31.156711] [ 31.156933] The buggy address belongs to the physical page: [ 31.157624] page:00000000c012c443 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x16988 [ 31.158768] memcg:ffff88800bed6501 [ 31.159214] flags: 0x100000000000200(slab|node=0|zone=1) [ 31.159906] page_type: 0xffffffff() [ 31.160376] raw: 0100000000000200 ffff8880087a0c80 dead000000000122 0000000000000000 [ 31.161348] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800bed6501 [ 31.162298] page dumped because: kasan: bad access detected [ 31.162994] [ 31.163216] Memory state around the buggy address: [ 31.163832] ffff888016988000: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 31.164731] ffff888016988080: 00 00 00 00 00 fc fc fc fc fc fc fc fc fa fb fb [ 31.165630] >ffff888016988100: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 31.166520] ^ [ 31.167195] ffff888016988180: fb fb fc fc fc fc fc fc fc fc fa fb fb fb fb fb [ 31.168093] ffff888016988200: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fc [ 31.168984] ================================================================== [ 31.169963] Disabling lock debugging due to kernel taint [ 33.858134] BUG: Bad rss-counter state mm:000000009f1eb07f type:MM_FILEPAGES val:33 [ 33.859311] BUG: Bad rss-counter state mm:000000009f1eb07f type:MM_ANONPAGES val:22 [ 34.271750] BUG: Bad rss-counter state mm:0000000095181d66 type:MM_FILEPAGES val:33 [ 34.272753] BUG: Bad rss-counter state mm:0000000095181d66 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:9269' (ECDSA) to the list of known hosts. 2023/06/20 13:15:54 fuzzer started 2023/06/20 13:15:54 dialing manager at localhost:36067 2023/06/20 13:15:54 checking machine... 2023/06/20 13:15:54 checking revisions... [ 34.912285] kmemleak: Automatic memory scanning thread ended 2023/06/20 13:15:55 testing simple program... [ 34.967507] cgroup: Unknown subsys name 'net' [ 35.020676] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 13:15:54 Registers: info registers vcpu 0 RAX=0000000000020ed2 RBX=0000000000000002 RCX=ffffffff8180effd RDX=0000000000020eda RSI=00000000000080ef RDI=0000000000062c76 RBP=ffff88806ce09ac8 RSP=ffff88806ce09a00 R8 =ffffffff861395f4 R9 =ffff88806ce09ab0 R10=0000000000038001 R11=0000000000020ed2 R12=ffff88806ce09ad0 R13=ffff88806ce09ab8 R14=ffff88806ce09ab1 R15=ffff88806ce09a70 RIP=ffffffff81130853 RFL=00000297 [--S-APC] 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 00007faa1939f900 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=00007faa19956618 CR3=000000001a32a000 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=6e69676f6c5f6d61702c78756e696c65 XMM02=755f6d61702c74696d7265705f6d6170 XMM03=2c766e655f6d61702c7374696d696c5f XMM04=6d61702c766e655f6d61702c7374696d XMM05=78696e755f6d61702c74696d7265705f XMM06=6469756e69676f6c5f6d61702c78756e XMM07=672065736f6c635f6e6f69737365733a XMM08=61662029286e65706f5f746964756100 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=ffff88806cf35000 RBX=0000000000000001 RCX=ffffffff8451250e RDX=ffffed100d9e6a01 RSI=0000000000000004 RDI=ffffffff81288ac5 RBP=dffffc0000000000 RSP=ffff888008e07e70 R8 =0000000000000000 R9 =ffffed100d9e6a00 R10=ffff88806cf35003 R11=0000000000000001 R12=ffffffff85d3d350 R13=1ffff110011c0fd3 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 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=00007f0cc29f5cc0 CR3=000000000ca9a000 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=87a7cdb8acd604ba934afd828c2926c2 XMM02=000000000011a798eff9b2d0a8fce9cb XMM03=000000000011a8682c67c8bc2e329bc3 XMM04=05929dec84acc97900000000000ae988 XMM05=19e9129bd510f2350000000000131b48 XMM06=4fda316b135da52b00000000001319d0 XMM07=e042d86d42eb936e0000000000121ef0 XMM08=98bdef6a69affc3b000000000011a868 XMM09=00000000000000000000000000000000 XMM10=20200000000020202020202020200000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000