syzkaller login: [ 39.002202] BUG: Bad rss-counter state mm:00000000d8f7ccfc type:MM_FILEPAGES val:33 [ 39.003481] BUG: Bad rss-counter state mm:00000000d8f7ccfc type:MM_ANONPAGES val:22 [ 39.041787] ================================================================== [ 39.042954] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 39.044136] Read of size 8 at addr ffff88800e888b38 by task sshd/220 [ 39.045035] [ 39.045289] CPU: 0 PID: 220 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 39.046300] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 39.047461] Call Trace: [ 39.047835] [ 39.048164] dump_stack_lvl+0x91/0xf0 [ 39.048747] print_report+0xcc/0x620 [ 39.049310] ? __virt_addr_valid+0x102/0x340 [ 39.049951] ? vma_interval_tree_remove+0xc75/0xec0 [ 39.050695] ? vma_interval_tree_remove+0xc75/0xec0 [ 39.051418] kasan_report+0xbe/0xf0 [ 39.051974] ? vma_interval_tree_remove+0xc75/0xec0 [ 39.052706] vma_interval_tree_remove+0xc75/0xec0 [ 39.053406] vma_prepare+0xc54/0x11a0 [ 39.053959] __split_vma+0x5af/0x950 [ 39.054514] ? __pfx___split_vma+0x10/0x10 [ 39.055135] ? find_held_lock+0x2c/0x110 [ 39.055743] do_vmi_align_munmap+0x2ba/0x11f0 [ 39.056414] ? lock_is_held_type+0x9f/0x120 [ 39.057051] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 39.057757] ? mtree_range_walk+0x632/0x900 [ 39.058395] ? mas_walk+0x5c7/0x7c0 [ 39.058961] do_vmi_munmap+0x1f1/0x2b0 [ 39.059530] mmap_region+0x1f9/0x2660 [ 39.060094] ? vm_mmap_pgoff+0x15c/0x3a0 [ 39.060699] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 39.061540] ? __pfx_lock_acquire+0x10/0x10 [ 39.062170] ? __pfx_mmap_region+0x10/0x10 [ 39.062823] ? security_mmap_addr+0x7d/0xa0 [ 39.063449] ? get_unmapped_area+0x1f5/0x3f0 [ 39.064101] do_mmap+0x854/0xf00 [ 39.064628] vm_mmap_pgoff+0x1a6/0x3a0 [ 39.065213] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 39.065862] ksys_mmap_pgoff+0x3af/0x500 [ 39.066458] do_syscall_64+0x3f/0x90 [ 39.067013] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 39.067759] RIP: 0033:0x7f0afd8d1d82 [ 39.068302] 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 [ 39.070824] RSP: 002b:00007ffdb12f26c8 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 39.071881] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f0afd8d1d82 [ 39.072877] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f0afcd0b000 [ 39.073883] RBP: 00007f0afcd0b000 R08: 0000000000000009 R09: 0000000000001000 [ 39.074764] R10: 0000000000000812 R11: 0000000000000206 R12: 000055d5b2fb0d90 [ 39.075622] R13: 00007ffdb12f26e0 R14: 00007ffdb12f2710 R15: 00007ffdb12f2a70 [ 39.076483] [ 39.076781] [ 39.076998] Allocated by task 213: [ 39.077426] kasan_save_stack+0x22/0x50 [ 39.077936] kasan_set_track+0x25/0x30 [ 39.078452] __kasan_slab_alloc+0x59/0x70 [ 39.078979] kmem_cache_alloc+0x16b/0x370 [ 39.079503] vm_area_dup+0x20/0x160 [ 39.079962] __split_vma+0x170/0x950 [ 39.080430] split_vma+0xc6/0x110 [ 39.080871] mprotect_fixup+0x8d2/0xb30 [ 39.081369] do_mprotect_pkey+0x87e/0xd40 [ 39.081889] __x64_sys_mprotect+0x78/0xc0 [ 39.082411] do_syscall_64+0x3f/0x90 [ 39.082894] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 39.083542] [ 39.083757] Freed by task 213: [ 39.084154] kasan_save_stack+0x22/0x50 [ 39.084660] kasan_set_track+0x25/0x30 [ 39.085162] kasan_save_free_info+0x2b/0x50 [ 39.085699] __kasan_slab_free+0x10a/0x190 [ 39.086231] kmem_cache_free+0x10d/0x4d0 [ 39.086749] rcu_core+0x8c8/0x2860 [ 39.087207] __do_softirq+0x1b7/0x7d4 [ 39.087692] [ 39.087911] Last potentially related work creation: [ 39.088501] kasan_save_stack+0x22/0x50 [ 39.089007] __kasan_record_aux_stack+0x8e/0xa0 [ 39.089580] __call_rcu_common.constprop.0+0x6a/0xb90 [ 39.090228] remove_vma+0x139/0x170 [ 39.090697] do_vmi_align_munmap+0xd4a/0x11f0 [ 39.091261] do_vmi_munmap+0x1f1/0x2b0 [ 39.091754] __vm_munmap+0x138/0x3a0 [ 39.092227] __x64_sys_munmap+0x59/0x80 [ 39.092729] do_syscall_64+0x3f/0x90 [ 39.093208] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 39.093852] [ 39.094070] Second to last potentially related work creation: [ 39.094759] kasan_save_stack+0x22/0x50 [ 39.095266] __kasan_record_aux_stack+0x8e/0xa0 [ 39.095841] __call_rcu_common.constprop.0+0x6a/0xb90 [ 39.096488] remove_vma+0x139/0x170 [ 39.096942] do_vmi_align_munmap+0xd4a/0x11f0 [ 39.097499] do_vmi_munmap+0x1f1/0x2b0 [ 39.097988] __vm_munmap+0x138/0x3a0 [ 39.098463] elf_map+0x26f/0x310 [ 39.098912] load_elf_binary+0xd82/0x5030 [ 39.099443] bprm_execve+0x803/0x1940 [ 39.099919] do_execveat_common+0x734/0x8e0 [ 39.100451] __x64_sys_execve+0x93/0xc0 [ 39.100942] do_syscall_64+0x3f/0x90 [ 39.101414] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 39.102065] [ 39.102279] The buggy address belongs to the object at ffff88800e888ae0 [ 39.102279] which belongs to the cache vm_area_struct of size 168 [ 39.103772] The buggy address is located 88 bytes inside of [ 39.103772] freed 168-byte region [ffff88800e888ae0, ffff88800e888b88) [ 39.105186] [ 39.105402] The buggy address belongs to the physical page: [ 39.106062] page:00000000b09693c8 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xe888 [ 39.107170] memcg:ffff88800e730101 [ 39.107597] anon flags: 0x100000000000200(slab|node=0|zone=1) [ 39.108297] page_type: 0xffffffff() [ 39.108746] raw: 0100000000000200 ffff8880087a0c80 0000000000000000 dead000000000001 [ 39.109671] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800e730101 [ 39.110593] page dumped because: kasan: bad access detected [ 39.111250] [ 39.111466] Memory state around the buggy address: [ 39.112056] ffff88800e888a00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 39.112926] ffff88800e888a80: fb fb fb fb fc fc fc fc fc fc fc fc fa fb fb fb [ 39.113794] >ffff88800e888b00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 39.114675] ^ [ 39.115296] ffff88800e888b80: fb fc fc fc fc fc fc fc fc 00 00 00 00 00 00 00 [ 39.116156] ffff88800e888c00: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 fc fc [ 39.117016] ================================================================== [ 39.118064] Disabling lock debugging due to kernel taint [ 40.759491] BUG: Bad rss-counter state mm:00000000218cc843 type:MM_FILEPAGES val:33 [ 40.760970] BUG: Bad rss-counter state mm:00000000218cc843 type:MM_ANONPAGES val:22 [ 41.270992] BUG: Bad rss-counter state mm:0000000069e4ce96 type:MM_FILEPAGES val:33 [ 41.272265] BUG: Bad rss-counter state mm:0000000069e4ce96 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:5771' (ECDSA) to the list of known hosts. 2023/06/20 18:17:19 fuzzer started 2023/06/20 18:17:20 dialing manager at localhost:36067 2023/06/20 18:17:20 checking machine... 2023/06/20 18:17:20 checking revisions... [ 41.998018] kmemleak: Automatic memory scanning thread ended 2023/06/20 18:17:20 testing simple program... [ 42.044799] cgroup: Unknown subsys name 'net' [ 42.163616] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 18:17:19 Registers: info registers vcpu 0 RAX=ffffed1002bb3e79 RBX=1ffff11002bb3e79 RCX=0000000000000002 RDX=0000000000000000 RSI=0000000000000000 RDI=ffffffff8560b640 RBP=0000000000000000 RSP=ffff888015d9f3b8 R8 =0000000000000000 R9 =0000000000000000 R10=0000000000000000 R11=00000000000b6a61 R12=0000000000000002 R13=0000000000000000 R14=ffffffff8560b640 R15=0000000000000000 RIP=ffffffff812d8ebf RFL=00000282 [--S----] 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 00007fa4d1fa9900 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=00007fa4d255e650 CR3=0000000016be2000 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=ffffffff8451250e RDX=ffffed100d9e6a01 RSI=0000000000000004 RDI=ffffffff81288ac5 RBP=dffffc0000000000 RSP=ffff888008e07e70 R8 =0000000000000000 R9 =ffffed100d9e6a00 R10=ffff88806cf35003 R11=ffff888008c04400 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=00007ffba9153000 CR3=000000000ef62000 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=20c0e2dcee4090a7644bd4e8ae807c10 XMM02=000000000011c170eff9b2d0a8fce9cb XMM03=000000000011c2402c67c8bc2e329bc3 XMM04=556579868875a0cf00000000000ae988 XMM05=19e9129bd510f23500000000001336b0 XMM06=fd60c87cb7e18e800000000000132888 XMM07=e042d86d42eb936e00000000001226c0 XMM08=0c01547c7fb0cc52000000000011c240 XMM09=00000000000000000000000000000000 XMM10=20200000000020202020202020200000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000