syzkaller login: [ 32.187748] BUG: Bad rss-counter state mm:0000000011e87cbe type:MM_FILEPAGES val:33 [ 32.188456] BUG: Bad rss-counter state mm:0000000011e87cbe type:MM_ANONPAGES val:22 [ 32.217510] ================================================================== [ 32.218325] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 32.219022] Read of size 8 at addr ffff88801afa4c20 by task sshd/220 [ 32.219591] [ 32.219752] CPU: 0 PID: 220 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 32.220384] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 32.221183] Call Trace: [ 32.221421] [ 32.221725] dump_stack_lvl+0x91/0xf0 [ 32.222085] print_report+0xcc/0x620 [ 32.222439] ? __virt_addr_valid+0x102/0x340 [ 32.222840] ? vma_interval_tree_remove+0xc75/0xec0 [ 32.223287] ? vma_interval_tree_remove+0xc75/0xec0 [ 32.223765] kasan_report+0xbe/0xf0 [ 32.224118] ? vma_interval_tree_remove+0xc75/0xec0 [ 32.224566] vma_interval_tree_remove+0xc75/0xec0 [ 32.225004] vma_prepare+0xc54/0x11a0 [ 32.225364] __split_vma+0x5af/0x950 [ 32.225705] ? __pfx___split_vma+0x10/0x10 [ 32.226092] ? find_held_lock+0x2c/0x110 [ 32.226481] do_vmi_align_munmap+0x2ba/0x11f0 [ 32.226912] ? lock_is_held_type+0x9f/0x120 [ 32.227313] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 32.227766] ? mtree_range_walk+0x632/0x900 [ 32.228173] ? mas_walk+0x5c7/0x7c0 [ 32.228525] do_vmi_munmap+0x1f1/0x2b0 [ 32.228882] mmap_region+0x1f9/0x2660 [ 32.229238] ? vm_mmap_pgoff+0x15c/0x3a0 [ 32.229612] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 32.230136] ? __pfx_lock_acquire+0x10/0x10 [ 32.230528] ? __pfx_mmap_region+0x10/0x10 [ 32.230921] ? security_mmap_addr+0x7d/0xa0 [ 32.231303] ? get_unmapped_area+0x1f5/0x3f0 [ 32.231724] do_mmap+0x854/0xf00 [ 32.232047] vm_mmap_pgoff+0x1a6/0x3a0 [ 32.232405] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 32.232810] ksys_mmap_pgoff+0x3af/0x500 [ 32.233186] do_syscall_64+0x3f/0x90 [ 32.233539] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 32.234020] RIP: 0033:0x7f879ff68d82 [ 32.234359] 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 [ 32.235911] RSP: 002b:00007fff4d1b7618 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 32.236559] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f879ff68d82 [ 32.237174] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f879f3a2000 [ 32.237785] RBP: 00007f879f3a2000 R08: 0000000000000009 R09: 0000000000001000 [ 32.238386] R10: 0000000000000812 R11: 0000000000000206 R12: 00005636f1929b20 [ 32.238994] R13: 00007fff4d1b7630 R14: 00007fff4d1b7660 R15: 00007fff4d1b79c0 [ 32.239651] [ 32.239862] [ 32.240019] Allocated by task 213: [ 32.240330] kasan_save_stack+0x22/0x50 [ 32.240715] kasan_set_track+0x25/0x30 [ 32.241071] __kasan_slab_alloc+0x59/0x70 [ 32.241458] kmem_cache_alloc+0x16b/0x370 [ 32.241827] vm_area_dup+0x20/0x160 [ 32.242170] __split_vma+0x170/0x950 [ 32.242519] split_vma+0xc6/0x110 [ 32.242862] mprotect_fixup+0x8d2/0xb30 [ 32.243238] do_mprotect_pkey+0x87e/0xd40 [ 32.243630] __x64_sys_mprotect+0x78/0xc0 [ 32.244004] do_syscall_64+0x3f/0x90 [ 32.244360] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 32.244834] [ 32.244991] Freed by task 213: [ 32.245275] kasan_save_stack+0x22/0x50 [ 32.245641] kasan_set_track+0x25/0x30 [ 32.246003] kasan_save_free_info+0x2b/0x50 [ 32.246394] __kasan_slab_free+0x10a/0x190 [ 32.246778] kmem_cache_free+0x10d/0x4d0 [ 32.247152] rcu_core+0x8c8/0x2860 [ 32.247472] __do_softirq+0x1b7/0x7d4 [ 32.247845] [ 32.248003] Last potentially related work creation: [ 32.248438] kasan_save_stack+0x22/0x50 [ 32.248806] __kasan_record_aux_stack+0x8e/0xa0 [ 32.249227] __call_rcu_common.constprop.0+0x6a/0xb90 [ 32.249694] remove_vma+0x139/0x170 [ 32.250030] do_vmi_align_munmap+0xd4a/0x11f0 [ 32.250443] do_vmi_munmap+0x1f1/0x2b0 [ 32.250793] __vm_munmap+0x138/0x3a0 [ 32.251138] __x64_sys_munmap+0x59/0x80 [ 32.251500] do_syscall_64+0x3f/0x90 [ 32.251866] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 32.252335] [ 32.252492] The buggy address belongs to the object at ffff88801afa4bc8 [ 32.252492] which belongs to the cache vm_area_struct of size 168 [ 32.253552] The buggy address is located 88 bytes inside of [ 32.253552] freed 168-byte region [ffff88801afa4bc8, ffff88801afa4c70) [ 32.254571] [ 32.254728] The buggy address belongs to the physical page: [ 32.255206] page:0000000053475d59 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x1afa4 [ 32.256009] memcg:ffff88800ec04001 [ 32.256330] flags: 0x100000000000200(slab|node=0|zone=1) [ 32.256792] page_type: 0xffffffff() [ 32.257129] raw: 0100000000000200 ffff88800879fc80 dead000000000122 0000000000000000 [ 32.257817] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800ec04001 [ 32.258464] page dumped because: kasan: bad access detected [ 32.258939] [ 32.259097] Memory state around the buggy address: [ 32.259522] ffff88801afa4b00: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 32.260179] ffff88801afa4b80: 00 fc fc fc fc fc fc fc fc fa fb fb fb fb fb fb [ 32.260800] >ffff88801afa4c00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fc fc [ 32.261447] ^ [ 32.261832] ffff88801afa4c80: fc fc fc fc fc fc fa fb fb fb fb fb fb fb fb fb [ 32.262466] ffff88801afa4d00: fb fb fb fb fb fb fb fb fb fb fb fc fc fc fc fc [ 32.263113] ================================================================== [ 32.264039] Disabling lock debugging due to kernel taint [ 33.690651] BUG: Bad rss-counter state mm:00000000783a2433 type:MM_FILEPAGES val:33 [ 33.692116] BUG: Bad rss-counter state mm:00000000783a2433 type:MM_ANONPAGES val:22 [ 34.102992] BUG: Bad rss-counter state mm:0000000036e039e0 type:MM_FILEPAGES val:33 [ 34.103766] BUG: Bad rss-counter state mm:0000000036e039e0 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:15247' (ECDSA) to the list of known hosts. 2023/06/20 08:23:48 fuzzer started 2023/06/20 08:23:48 dialing manager at localhost:44161 2023/06/20 08:23:48 checking machine... 2023/06/20 08:23:48 checking revisions... [ 34.603722] kmemleak: Automatic memory scanning thread ended 2023/06/20 08:23:48 testing simple program... [ 34.650311] cgroup: Unknown subsys name 'net' [ 34.685774] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 08:23:47 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=00007ffeee5a2ea8 CR3=0000000005482000 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=00007fd5efc5851000005650990d2790 XMM02=6f6974707972636e6561737268746977 XMM03=00000000000000000000000000777074 XMM04=40404040404040404040404040404040 XMM05=5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a XMM06=20202020202020202020202020202020 XMM07=ffffffffffff00ffffff00ffffff00ff XMM08=00002000000000202020002020200000 XMM09=ffffffffffff00ffffff00ffffff00ff XMM10=00002000000000202020002020200000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=0000000000000000 RBX=ffff88801c98fa20 RCX=0000000000000001 RDX=1ffff11003931f46 RSI=ffffffff8180995d RDI=ffff88801c98fa30 RBP=ffff88801c98f9f0 RSP=ffff88801c98f938 R8 =0000000000000001 R9 =ffff88801c98f998 R10=0000000000038001 R11=0000000000020dae R12=ffff88801c98fa20 R13=0000000000000000 R14=ffff888009aed1c0 R15=ffff88801991b980 RIP=ffffffff813ad446 RFL=00000292 [--S-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 00007f988ac8e900 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=00007fffa9f07000 CR3=000000000df84000 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=635f6e6f69737365733a4d41503d706f XMM01=6f6c5f6d61702c78756e696c65735f6d XMM02=61702c74696d7265705f6d61702c7469 XMM03=655f6d61702c7374696d696c5f6d6170 XMM04=3d6c616e696d72657420322e322e302e XMM05=3d656d616e74736f682022646873732f XMM06=746f6f72223d746363612078756e696c XMM07=6e655f6d61702c7374696d696c5f6d61 XMM08=652075253d64692073253d706f000000 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000