syzkaller login: [ 87.927137] BUG: Bad rss-counter state mm:00000000a546846b type:MM_FILEPAGES val:33 [ 87.928096] BUG: Bad rss-counter state mm:00000000a546846b type:MM_ANONPAGES val:22 [ 88.086378] ================================================================== [ 88.087393] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 88.088592] Read of size 8 at addr ffff88801656b968 by task sshd/221 [ 88.089447] [ 88.089707] CPU: 1 PID: 221 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 88.090677] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 88.091764] Call Trace: [ 88.092121] <TASK> [ 88.092442] dump_stack_lvl+0x91/0xf0 [ 88.092993] print_report+0xcc/0x620 [ 88.093538] ? __virt_addr_valid+0x102/0x340 [ 88.094166] ? vma_interval_tree_remove+0xc75/0xec0 [ 88.094740] ? vma_interval_tree_remove+0xc75/0xec0 [ 88.095330] kasan_report+0xbe/0xf0 [ 88.095783] ? vma_interval_tree_remove+0xc75/0xec0 [ 88.096379] vma_interval_tree_remove+0xc75/0xec0 [ 88.096954] vma_prepare+0xc54/0x11a0 [ 88.097420] __split_vma+0x5af/0x950 [ 88.097885] ? __pfx___split_vma+0x10/0x10 [ 88.098402] ? find_held_lock+0x2c/0x110 [ 88.098904] do_vmi_align_munmap+0x2ba/0x11f0 [ 88.099448] ? mark_held_locks+0x9e/0xe0 [ 88.099934] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 88.100518] ? asm_sysvec_apic_timer_interrupt+0x1a/0x20 [ 88.101176] ? mas_walk+0x657/0x7c0 [ 88.101665] ? __pfx___sanitizer_cov_trace_pc+0x10/0x10 [ 88.102543] ? mas_walk+0x5c7/0x7c0 [ 88.103133] do_vmi_munmap+0x1f1/0x2b0 [ 88.103746] mmap_region+0x1f9/0x2660 [ 88.104302] ? vm_mmap_pgoff+0x15c/0x3a0 [ 88.104872] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 88.105737] ? __pfx_lock_acquire+0x10/0x10 [ 88.106340] ? __pfx_mmap_region+0x10/0x10 [ 88.106932] ? security_mmap_addr+0x7d/0xa0 [ 88.107588] ? get_unmapped_area+0x1f5/0x3f0 [ 88.108272] do_mmap+0x854/0xf00 [ 88.108787] vm_mmap_pgoff+0x1a6/0x3a0 [ 88.109406] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 88.110119] ksys_mmap_pgoff+0x3af/0x500 [ 88.110603] do_syscall_64+0x3f/0x90 [ 88.111055] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 88.111667] RIP: 0033:0x7fc1f7c82d82 [ 88.112101] 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 [ 88.114090] RSP: 002b:00007fff06df6258 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 88.114934] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007fc1f7c82d82 [ 88.115725] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007fc1f70bc000 [ 88.116513] RBP: 00007fc1f70bc000 R08: 0000000000000009 R09: 0000000000001000 [ 88.117399] R10: 0000000000000812 R11: 0000000000000206 R12: 0000556612b27b20 [ 88.118320] R13: 00007fff06df6270 R14: 00007fff06df62a0 R15: 00007fff06df6600 [ 88.119193] </TASK> [ 88.119486] [ 88.119701] Allocated by task 214: [ 88.120133] kasan_save_stack+0x22/0x50 [ 88.120642] kasan_set_track+0x25/0x30 [ 88.121139] __kasan_slab_alloc+0x59/0x70 [ 88.121698] kmem_cache_alloc+0x16b/0x370 [ 88.122232] vm_area_dup+0x20/0x160 [ 88.122684] __split_vma+0x170/0x950 [ 88.123165] split_vma+0xc6/0x110 [ 88.123610] mprotect_fixup+0x8d2/0xb30 [ 88.124108] do_mprotect_pkey+0x87e/0xd40 [ 88.124646] __x64_sys_mprotect+0x78/0xc0 [ 88.125176] do_syscall_64+0x3f/0x90 [ 88.125653] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 88.126302] [ 88.126521] Freed by task 214: [ 88.126916] kasan_save_stack+0x22/0x50 [ 88.127425] kasan_set_track+0x25/0x30 [ 88.127932] kasan_save_free_info+0x2b/0x50 [ 88.128461] __kasan_slab_free+0x10a/0x190 [ 88.128996] kmem_cache_free+0x10d/0x4d0 [ 88.129532] rcu_core+0x8c8/0x2860 [ 88.130004] __do_softirq+0x1b7/0x7d4 [ 88.130508] [ 88.130727] Last potentially related work creation: [ 88.131352] kasan_save_stack+0x22/0x50 [ 88.131888] __kasan_record_aux_stack+0x8e/0xa0 [ 88.132497] __call_rcu_common.constprop.0+0x6a/0xb90 [ 88.133170] remove_vma+0x139/0x170 [ 88.133674] do_vmi_align_munmap+0xd4a/0x11f0 [ 88.134277] do_vmi_munmap+0x1f1/0x2b0 [ 88.134795] __vm_munmap+0x138/0x3a0 [ 88.135299] __x64_sys_munmap+0x59/0x80 [ 88.135824] do_syscall_64+0x3f/0x90 [ 88.136326] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 88.137002] [ 88.137219] The buggy address belongs to the object at ffff88801656b910 [ 88.137219] which belongs to the cache vm_area_struct of size 168 [ 88.138693] The buggy address is located 88 bytes inside of [ 88.138693] freed 168-byte region [ffff88801656b910, ffff88801656b9b8) [ 88.140119] [ 88.140334] The buggy address belongs to the physical page: [ 88.141000] page:0000000015ae669b refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x1656b [ 88.142138] memcg:ffff888016d8b801 [ 88.142566] flags: 0x100000000000200(slab|node=0|zone=1) [ 88.143211] page_type: 0xffffffff() [ 88.143666] raw: 0100000000000200 ffff88800879fc80 dead000000000122 0000000000000000 [ 88.144592] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff888016d8b801 [ 88.145459] page dumped because: kasan: bad access detected [ 88.146087] [ 88.146309] Memory state around the buggy address: [ 88.146905] ffff88801656b800: fc fc fc fc fc 00 00 00 00 00 00 00 00 00 00 00 [ 88.147760] ffff88801656b880: 00 00 00 00 00 00 00 00 00 00 fc fc fc fc fc fc [ 88.148636] >ffff88801656b900: fc fc fa fb fb fb fb fb fb fb fb fb fb fb fb fb [ 88.149493] ^ [ 88.150293] ffff88801656b980: fb fb fb fb fb fb fb fc fc fc fc fc fc fc fc fa [ 88.151194] ffff88801656ba00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 88.152091] ================================================================== [ 88.153257] Disabling lock debugging due to kernel taint [ 90.150913] BUG: Bad rss-counter state mm:0000000014b318c4 type:MM_FILEPAGES val:33 [ 90.152480] BUG: Bad rss-counter state mm:0000000014b318c4 type:MM_ANONPAGES val:22 [ 90.714147] BUG: Bad rss-counter state mm:000000005d2f1e26 type:MM_FILEPAGES val:33 [ 90.715308] BUG: Bad rss-counter state mm:000000005d2f1e26 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:61472' (ECDSA) to the list of known hosts. 2023/06/20 05:41:40 fuzzer started 2023/06/20 05:41:41 dialing manager at localhost:44161 2023/06/20 05:41:41 checking machine... 2023/06/20 05:41:41 checking revisions... [ 91.351614] kmemleak: Automatic memory scanning thread ended 2023/06/20 05:41:41 testing simple program... [ 91.406352] cgroup: Unknown subsys name 'net' [ 91.446038] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 05:41:14 Registers: info registers vcpu 0 RAX=0000000000000008 RBX=0000560545d6ff70 RCX=00007f3656939f18 RDX=0000000000080000 RSI=00007f365644815e RDI=00000000ffffff9c RBP=0000000000000008 RSP=00007ffda0ea2b20 R8 =0000000000080000 R9 =00007f365644815e R10=0000000000000000 R11=0000000000000287 R12=00007f3656448003 R13=0000560545d6ff70 R14=0000000000000001 R15=0000560545d68480 RIP=00007f3656939f18 RFL=00000287 [--S--PC] CPL=3 II=0 A20=1 SMM=0 HLT=0 ES =0000 0000000000000000 00000000 00000000 CS =0033 0000000000000000 ffffffff 00a0fb00 DPL=3 CS64 [-RA] SS =002b 0000000000000000 ffffffff 00c0f300 DPL=3 DS [-WA] DS =0000 0000000000000000 00000000 00000000 FS =0000 00007f3656452900 00000000 00000000 GS =0000 0000000000000000 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=00007f3656a0a0b0 CR3=0000000019502000 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=000000000000000000000000000000ff XMM02=000000000000000000000000000000ff XMM03=5320444f4854454d5f54505952434e45 XMM04=40404040404040404040404040404040 XMM05=5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a XMM06=20202020202020202020202020202020 XMM07=00000000000000000000000000000000 XMM08=ffbc64ffffbc44ffffbc34ffffbc9f00 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=00007ff3a843d130 CR3=000000000d756000 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=8379861606c7a8b74b4a942981b216a3 XMM02=000000000011c828eff9b2d0a8fce9cb XMM03=000000000011c8f82c67c8bc2e329bc3 XMM04=02b1ac33f904793900000000000ae988 XMM05=e4cb8bb95a7664b60000000000133868 XMM06=c291bd5c70af25b900000000001336f0 XMM07=e042d86d42eb936e0000000000123b80 XMM08=54c589a2a0d44b37000000000011c8f8 XMM09=00000000000000000000000000000000 XMM10=20200000000020202020202020200000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000