syzkaller login: [ 51.171877] BUG: Bad rss-counter state mm:00000000158bfe24 type:MM_FILEPAGES val:33 [ 51.172991] BUG: Bad rss-counter state mm:00000000158bfe24 type:MM_ANONPAGES val:22 [ 51.215142] ================================================================== [ 51.216130] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 51.217094] Read of size 8 at addr ffff88800e31c140 by task sshd/220 [ 51.218023] [ 51.218241] CPU: 1 PID: 220 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 51.219150] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 51.220203] Call Trace: [ 51.220522] [ 51.220839] dump_stack_lvl+0x91/0xf0 [ 51.221324] print_report+0xcc/0x620 [ 51.221818] ? __virt_addr_valid+0x102/0x340 [ 51.222424] ? vma_interval_tree_remove+0xc75/0xec0 [ 51.223082] ? vma_interval_tree_remove+0xc75/0xec0 [ 51.223739] kasan_report+0xbe/0xf0 [ 51.224279] ? vma_interval_tree_remove+0xc75/0xec0 [ 51.224874] vma_interval_tree_remove+0xc75/0xec0 [ 51.225571] vma_prepare+0xc54/0x11a0 [ 51.226048] __split_vma+0x5af/0x950 [ 51.226503] ? __pfx___split_vma+0x10/0x10 [ 51.227021] ? find_held_lock+0x2c/0x110 [ 51.227527] do_vmi_align_munmap+0x2ba/0x11f0 [ 51.228074] ? lock_is_held_type+0x9f/0x120 [ 51.228599] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 51.229193] ? mtree_range_walk+0x632/0x900 [ 51.229737] ? mas_walk+0x5c7/0x7c0 [ 51.230195] do_vmi_munmap+0x1f1/0x2b0 [ 51.230676] mmap_region+0x1f9/0x2660 [ 51.231169] ? vm_mmap_pgoff+0x15c/0x3a0 [ 51.231664] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 51.232371] ? __pfx_lock_acquire+0x10/0x10 [ 51.232894] ? __pfx_mmap_region+0x10/0x10 [ 51.233405] ? security_mmap_addr+0x7d/0xa0 [ 51.233915] ? get_unmapped_area+0x1f5/0x3f0 [ 51.234437] do_mmap+0x854/0xf00 [ 51.234854] vm_mmap_pgoff+0x1a6/0x3a0 [ 51.235344] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 51.235878] ksys_mmap_pgoff+0x3af/0x500 [ 51.236364] do_syscall_64+0x3f/0x90 [ 51.236819] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 51.237439] RIP: 0033:0x7ff2efdead82 [ 51.237873] 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 [ 51.239924] RSP: 002b:00007ffe7b5d97d8 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 51.240788] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007ff2efdead82 [ 51.241587] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007ff2ef224000 [ 51.242386] RBP: 00007ff2ef224000 R08: 0000000000000009 R09: 0000000000001000 [ 51.243196] R10: 0000000000000812 R11: 0000000000000206 R12: 000056349d0c5f70 [ 51.244005] R13: 00007ffe7b5d97f0 R14: 00007ffe7b5d9820 R15: 00007ffe7b5d9b80 [ 51.244814] [ 51.245098] [ 51.245310] Allocated by task 213: [ 51.245717] kasan_save_stack+0x22/0x50 [ 51.246202] kasan_set_track+0x25/0x30 [ 51.246674] __kasan_slab_alloc+0x59/0x70 [ 51.247189] kmem_cache_alloc+0x16b/0x370 [ 51.247685] vm_area_dup+0x20/0x160 [ 51.248114] __split_vma+0x170/0x950 [ 51.248551] split_vma+0xc6/0x110 [ 51.248964] mprotect_fixup+0x8d2/0xb30 [ 51.249435] do_mprotect_pkey+0x87e/0xd40 [ 51.249924] __x64_sys_mprotect+0x78/0xc0 [ 51.250417] do_syscall_64+0x3f/0x90 [ 51.250861] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 51.251485] [ 51.251689] Freed by task 203: [ 51.252057] kasan_save_stack+0x22/0x50 [ 51.252536] kasan_set_track+0x25/0x30 [ 51.253004] kasan_save_free_info+0x2b/0x50 [ 51.253510] __kasan_slab_free+0x10a/0x190 [ 51.254015] kmem_cache_free+0x10d/0x4d0 [ 51.254498] rcu_core+0x8c8/0x2860 [ 51.254934] __do_softirq+0x1b7/0x7d4 [ 51.255390] [ 51.255594] Last potentially related work creation: [ 51.256148] kasan_save_stack+0x22/0x50 [ 51.256629] __kasan_record_aux_stack+0x8e/0xa0 [ 51.257171] __call_rcu_common.constprop.0+0x6a/0xb90 [ 51.257795] remove_vma+0x139/0x170 [ 51.258244] do_vmi_align_munmap+0xd4a/0x11f0 [ 51.258790] do_vmi_munmap+0x1f1/0x2b0 [ 51.259275] __vm_munmap+0x138/0x3a0 [ 51.259731] __x64_sys_munmap+0x59/0x80 [ 51.260291] do_syscall_64+0x3f/0x90 [ 51.260754] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 51.261388] [ 51.261598] The buggy address belongs to the object at ffff88800e31c0e8 [ 51.261598] which belongs to the cache vm_area_struct of size 168 [ 51.263056] The buggy address is located 88 bytes inside of [ 51.263056] freed 168-byte region [ffff88800e31c0e8, ffff88800e31c190) [ 51.264423] [ 51.264633] The buggy address belongs to the physical page: [ 51.265269] page:000000003c06423d refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xe31c [ 51.266332] memcg:ffff88800ed43a01 [ 51.266750] flags: 0x100000000000200(slab|node=0|zone=1) [ 51.267389] page_type: 0xffffffff() [ 51.267828] raw: 0100000000000200 ffff88800879fc80 ffffea0000365f00 dead000000000008 [ 51.268710] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800ed43a01 [ 51.269581] page dumped because: kasan: bad access detected [ 51.270202] [ 51.270406] Memory state around the buggy address: [ 51.270986] ffff88800e31c000: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 51.271811] ffff88800e31c080: 00 00 00 00 00 fc fc fc fc fc fc fc fc fa fb fb [ 51.272627] >ffff88800e31c100: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 51.273424] ^ [ 51.274033] ffff88800e31c180: fb fb fc fc fc fc fc fc fc fc fa fb fb fb fb fb [ 51.274863] ffff88800e31c200: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fc [ 51.275707] ================================================================== [ 51.276605] Disabling lock debugging due to kernel taint [ 53.235730] BUG: Bad rss-counter state mm:000000008948ef83 type:MM_FILEPAGES val:33 [ 53.237060] BUG: Bad rss-counter state mm:000000008948ef83 type:MM_ANONPAGES val:22 [ 53.731680] BUG: Bad rss-counter state mm:000000009f35560d type:MM_FILEPAGES val:33 [ 53.732909] BUG: Bad rss-counter state mm:000000009f35560d type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:47901' (ECDSA) to the list of known hosts. 2023/06/20 03:44:24 fuzzer started 2023/06/20 03:44:25 dialing manager at localhost:44161 2023/06/20 03:44:25 checking machine... 2023/06/20 03:44:25 checking revisions... [ 54.403854] kmemleak: Automatic memory scanning thread ended 2023/06/20 03:44:25 testing simple program... [ 54.448094] cgroup: Unknown subsys name 'net' [ 54.504570] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 03:44:04 Registers: info registers vcpu 0 RAX=0000000000000000 RBX=ffff88800f18b680 RCX=1ffff1100341aca0 RDX=1ffff11001e31774 RSI=0000000000000004 RDI=ffff88800f18bba0 RBP=0000000000000078 RSP=ffff88801ce27ca8 R8 =0000000000000001 R9 =ffff88801a0d659c R10=ffff88801a0d6553 R11=00000000000b6996 R12=ffff88801a21c8a0 R13=0000000000000000 R14=ffff88801a0d6508 R15=ffff88801a0d64c0 RIP=ffffffff81847821 RFL=00000216 [----AP-] 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 00007f37c19d2900 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=00007f37c1f8a0b0 CR3=000000000ebc8000 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=25252525252525252525252525252525 XMM01=000000000000000000000000000000ff XMM02=000000000000000000000000000000ff XMM03=5320444f4854454d5f54505952434e45 XMM04=40404040404040404040404040404040 XMM05=5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a XMM06=20202020202020202020202020202020 XMM07=00000000000000000000000000000000 XMM08=662079726f6d656d20666f2074756f00 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=00007fad2fef3b10 CR3=000000000c94a000 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=104cec33050284bf3747fe51d2546e0a XMM02=000000000011d990eff9b2d0a8fce9cb XMM03=000000000011da602c67c8bc2e329bc3 XMM04=0dd6803b00bfdee200000000000ae988 XMM05=19e9129bd510f23500000000001342a0 XMM06=ee573104b3810d2a0000000000133108 XMM07=e042d86d42eb936e0000000000124988 XMM08=0715771207dae075000000000011da60 XMM09=00000000000000000000000000000000 XMM10=20200000000020202020202020200000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000