syzkaller login: [ 30.948092] BUG: Bad rss-counter state mm:00000000d9babd4d type:MM_FILEPAGES val:33 [ 30.949559] BUG: Bad rss-counter state mm:00000000d9babd4d type:MM_ANONPAGES val:22 [ 31.134603] ================================================================== [ 31.135763] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 31.137080] Read of size 8 at addr ffff88801696fb38 by task sshd/220 [ 31.138020] [ 31.138262] CPU: 0 PID: 220 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 31.139243] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 31.140327] Call Trace: [ 31.140681] [ 31.141001] dump_stack_lvl+0x91/0xf0 [ 31.141549] print_report+0xcc/0x620 [ 31.142099] ? __virt_addr_valid+0x102/0x340 [ 31.142718] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.143431] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.144155] kasan_report+0xbe/0xf0 [ 31.144699] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.145399] vma_interval_tree_remove+0xc75/0xec0 [ 31.146092] vma_prepare+0xc54/0x11a0 [ 31.146623] __split_vma+0x5af/0x950 [ 31.147202] ? __pfx___split_vma+0x10/0x10 [ 31.147803] ? find_held_lock+0x2c/0x110 [ 31.148388] do_vmi_align_munmap+0x2ba/0x11f0 [ 31.149043] ? lock_is_held_type+0x9f/0x120 [ 31.149690] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 31.150408] ? mtree_range_walk+0x632/0x900 [ 31.151059] ? mas_walk+0x5c7/0x7c0 [ 31.151612] do_vmi_munmap+0x1f1/0x2b0 [ 31.152203] mmap_region+0x1f9/0x2660 [ 31.152773] ? vm_mmap_pgoff+0x15c/0x3a0 [ 31.153378] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 31.154240] ? __pfx_lock_acquire+0x10/0x10 [ 31.154880] ? __pfx_mmap_region+0x10/0x10 [ 31.155506] ? security_mmap_addr+0x7d/0xa0 [ 31.156138] ? get_unmapped_area+0x1f5/0x3f0 [ 31.156780] do_mmap+0x854/0xf00 [ 31.157302] vm_mmap_pgoff+0x1a6/0x3a0 [ 31.157893] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 31.158565] ksys_mmap_pgoff+0x3af/0x500 [ 31.159095] do_syscall_64+0x3f/0x90 [ 31.159601] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.160281] RIP: 0033:0x7f7b2bc8ad82 [ 31.160756] 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 [ 31.163047] RSP: 002b:00007ffec4411398 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 31.164012] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f7b2bc8ad82 [ 31.164902] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f7b2b0c4000 [ 31.165805] RBP: 00007f7b2b0c4000 R08: 0000000000000009 R09: 0000000000001000 [ 31.166694] R10: 0000000000000812 R11: 0000000000000206 R12: 0000564183f5eec0 [ 31.167592] R13: 00007ffec44113b0 R14: 00007ffec44113e0 R15: 00007ffec4411740 [ 31.168494] [ 31.168796] [ 31.169024] Allocated by task 213: [ 31.169473] kasan_save_stack+0x22/0x50 [ 31.170013] kasan_set_track+0x25/0x30 [ 31.170523] __kasan_slab_alloc+0x59/0x70 [ 31.171068] kmem_cache_alloc+0x16b/0x370 [ 31.171604] vm_area_dup+0x20/0x160 [ 31.172078] __split_vma+0x170/0x950 [ 31.172563] split_vma+0xc6/0x110 [ 31.173023] mprotect_fixup+0x8d2/0xb30 [ 31.173546] do_mprotect_pkey+0x87e/0xd40 [ 31.174115] __x64_sys_mprotect+0x78/0xc0 [ 31.174665] do_syscall_64+0x3f/0x90 [ 31.175163] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.175831] [ 31.176055] Freed by task 19: [ 31.176458] kasan_save_stack+0x22/0x50 [ 31.176983] kasan_set_track+0x25/0x30 [ 31.177491] kasan_save_free_info+0x2b/0x50 [ 31.178056] __kasan_slab_free+0x10a/0x190 [ 31.178621] kmem_cache_free+0x10d/0x4d0 [ 31.179153] rcu_core+0x8c8/0x2860 [ 31.179616] __do_softirq+0x1b7/0x7d4 [ 31.180115] [ 31.180344] Last potentially related work creation: [ 31.180957] kasan_save_stack+0x22/0x50 [ 31.181488] __kasan_record_aux_stack+0x8e/0xa0 [ 31.182098] __call_rcu_common.constprop.0+0x6a/0xb90 [ 31.182764] remove_vma+0x139/0x170 [ 31.183234] do_vmi_align_munmap+0xd4a/0x11f0 [ 31.183818] do_vmi_munmap+0x1f1/0x2b0 [ 31.184329] __vm_munmap+0x138/0x3a0 [ 31.184811] __x64_sys_munmap+0x59/0x80 [ 31.185336] do_syscall_64+0x3f/0x90 [ 31.185853] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.186520] [ 31.186747] The buggy address belongs to the object at ffff88801696fae0 [ 31.186747] which belongs to the cache vm_area_struct of size 168 [ 31.188286] The buggy address is located 88 bytes inside of [ 31.188286] freed 168-byte region [ffff88801696fae0, ffff88801696fb88) [ 31.189761] [ 31.189988] The buggy address belongs to the physical page: [ 31.190677] page:000000007e90dd46 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x1696f [ 31.191818] memcg:ffff88800ed2a001 [ 31.192265] flags: 0x100000000000200(slab|node=0|zone=1) [ 31.192941] page_type: 0xffffffff() [ 31.193409] raw: 0100000000000200 ffff8880087a0c80 dead000000000122 0000000000000000 [ 31.194385] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800ed2a001 [ 31.195447] page dumped because: kasan: bad access detected [ 31.196227] [ 31.196476] Memory state around the buggy address: [ 31.197164] ffff88801696fa00: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 31.198198] ffff88801696fa80: 00 00 00 00 fc fc fc fc fc fc fc fc fa fb fb fb [ 31.199213] >ffff88801696fb00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 31.200221] ^ [ 31.200948] ffff88801696fb80: fb fc fc fc fc fc fc fc fc fa fb fb fb fb fb fb [ 31.201975] ffff88801696fc00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fc fc [ 31.202977] ================================================================== [ 31.204159] Disabling lock debugging due to kernel taint [ 33.568171] BUG: Bad rss-counter state mm:00000000f639e005 type:MM_FILEPAGES val:33 [ 33.569317] BUG: Bad rss-counter state mm:00000000f639e005 type:MM_ANONPAGES val:22 [ 34.020160] BUG: Bad rss-counter state mm:00000000fb3fe33f type:MM_FILEPAGES val:33 [ 34.021426] BUG: Bad rss-counter state mm:00000000fb3fe33f type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:4300' (ECDSA) to the list of known hosts. 2023/06/21 04:40:12 fuzzer started 2023/06/21 04:40:13 dialing manager at localhost:36067 2023/06/21 04:40:13 checking machine... 2023/06/21 04:40:13 checking revisions... [ 34.637461] kmemleak: Automatic memory scanning thread ended 2023/06/21 04:40:13 testing simple program... [ 34.693037] cgroup: Unknown subsys name 'net' [ 34.742398] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 04:40:12 Registers: info registers vcpu 0 RAX=dffffc0000000000 RBX=1ffff11002cf9e85 RCX=0000000000000002 RDX=0000000000000000 RSI=0000000000000000 RDI=ffffffff8560b640 RBP=0000000000000000 RSP=ffff8880167cf418 R8 =0000000000000000 R9 =0000000000000000 R10=000000000000000e R11=0000098100000981 R12=0000000000000002 R13=0000000000000000 R14=ffffffff8560b640 R15=0000000000000000 RIP=ffffffff812d8ead RFL=00000212 [----A--] 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 00007efe6fd9a900 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=00007efe70351618 CR3=000000000e8c6000 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=00007fa17a24b430 CR3=000000000c602000 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=ef735643d5a64d836344a952a8c52d58 XMM02=2c67c8bc2e329bc3000000000011d370 XMM03=fb795ef6d65770560000000000121a38 XMM04=911c3783a0a7708000000000000ae988 XMM05=19e9129bd510f2350000000000131870 XMM06=4fda316b135da52b00000000001316f8 XMM07=e042d86d42eb936e0000000000121cb8 XMM08=eb9f1e0f929d8e88000000000011d3d0 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000