syzkaller login: [ 58.845439] BUG: Bad rss-counter state mm:0000000099f8f3cb type:MM_FILEPAGES val:33 [ 58.846621] BUG: Bad rss-counter state mm:0000000099f8f3cb type:MM_ANONPAGES val:22 [ 59.002478] ================================================================== [ 59.003399] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 59.004338] Read of size 8 at addr ffff88800dc57058 by task sshd/221 [ 59.005110] [ 59.005333] CPU: 1 PID: 221 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 59.006375] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 59.007382] Call Trace: [ 59.007714] [ 59.008017] dump_stack_lvl+0x91/0xf0 [ 59.008514] print_report+0xcc/0x620 [ 59.008996] ? __virt_addr_valid+0x102/0x340 [ 59.009543] ? vma_interval_tree_remove+0xc75/0xec0 [ 59.010155] ? vma_interval_tree_remove+0xc75/0xec0 [ 59.010772] kasan_report+0xbe/0xf0 [ 59.011262] ? vma_interval_tree_remove+0xc75/0xec0 [ 59.011878] vma_interval_tree_remove+0xc75/0xec0 [ 59.012473] vma_prepare+0xc54/0x11a0 [ 59.012950] __split_vma+0x5af/0x950 [ 59.013419] ? __pfx___split_vma+0x10/0x10 [ 59.013948] ? find_held_lock+0x2c/0x110 [ 59.014467] do_vmi_align_munmap+0x2ba/0x11f0 [ 59.015055] ? lock_is_held_type+0x9f/0x120 [ 59.015598] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 59.016202] ? mtree_range_walk+0x632/0x900 [ 59.016752] ? mas_walk+0x5c7/0x7c0 [ 59.017229] do_vmi_munmap+0x1f1/0x2b0 [ 59.017719] mmap_region+0x1f9/0x2660 [ 59.018204] ? vm_mmap_pgoff+0x15c/0x3a0 [ 59.018717] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 59.019439] ? __pfx_lock_acquire+0x10/0x10 [ 59.019968] ? __pfx_mmap_region+0x10/0x10 [ 59.020495] ? security_mmap_addr+0x7d/0xa0 [ 59.021021] ? get_unmapped_area+0x1f5/0x3f0 [ 59.021564] do_mmap+0x854/0xf00 [ 59.022004] vm_mmap_pgoff+0x1a6/0x3a0 [ 59.022497] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 59.023064] ksys_mmap_pgoff+0x3af/0x500 [ 59.023565] do_syscall_64+0x3f/0x90 [ 59.024040] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 59.024684] RIP: 0033:0x7f23c0ab4d82 [ 59.025144] 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 [ 59.027278] RSP: 002b:00007ffcda380298 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 59.028186] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f23c0ab4d82 [ 59.029024] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f23bfeee000 [ 59.029865] RBP: 00007f23bfeee000 R08: 0000000000000009 R09: 0000000000001000 [ 59.030706] R10: 0000000000000812 R11: 0000000000000206 R12: 000055eab0f88ec0 [ 59.031563] R13: 00007ffcda3802b0 R14: 00007ffcda3802e0 R15: 00007ffcda380640 [ 59.032416] [ 59.032713] [ 59.032928] Allocated by task 214: [ 59.033356] kasan_save_stack+0x22/0x50 [ 59.033861] kasan_set_track+0x25/0x30 [ 59.034353] __kasan_slab_alloc+0x59/0x70 [ 59.034883] kmem_cache_alloc+0x16b/0x370 [ 59.035404] vm_area_dup+0x20/0x160 [ 59.035862] __split_vma+0x170/0x950 [ 59.036330] split_vma+0xc6/0x110 [ 59.036766] mprotect_fixup+0x8d2/0xb30 [ 59.037265] do_mprotect_pkey+0x87e/0xd40 [ 59.037806] __x64_sys_mprotect+0x78/0xc0 [ 59.038322] do_syscall_64+0x3f/0x90 [ 59.038799] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 59.039452] [ 59.039665] Freed by task 214: [ 59.040054] kasan_save_stack+0x22/0x50 [ 59.040555] kasan_set_track+0x25/0x30 [ 59.041046] kasan_save_free_info+0x2b/0x50 [ 59.041570] __kasan_slab_free+0x10a/0x190 [ 59.042102] kmem_cache_free+0x10d/0x4d0 [ 59.042609] rcu_core+0x8c8/0x2860 [ 59.043055] __do_softirq+0x1b7/0x7d4 [ 59.043532] [ 59.043748] Last potentially related work creation: [ 59.044337] kasan_save_stack+0x22/0x50 [ 59.044839] __kasan_record_aux_stack+0x8e/0xa0 [ 59.045406] __call_rcu_common.constprop.0+0x6a/0xb90 [ 59.046045] remove_vma+0x139/0x170 [ 59.046545] do_vmi_align_munmap+0xd4a/0x11f0 [ 59.047136] do_vmi_munmap+0x1f1/0x2b0 [ 59.047623] __vm_munmap+0x138/0x3a0 [ 59.048091] __x64_sys_munmap+0x59/0x80 [ 59.048581] do_syscall_64+0x3f/0x90 [ 59.049058] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 59.049696] [ 59.049909] The buggy address belongs to the object at ffff88800dc57000 [ 59.049909] which belongs to the cache vm_area_struct of size 168 [ 59.051375] The buggy address is located 88 bytes inside of [ 59.051375] freed 168-byte region [ffff88800dc57000, ffff88800dc570a8) [ 59.052773] [ 59.052989] The buggy address belongs to the physical page: [ 59.053646] page:0000000065f344ac refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xdc57 [ 59.054725] memcg:ffff88800ded1a01 [ 59.055155] flags: 0x100000000000200(slab|node=0|zone=1) [ 59.055798] page_type: 0xffffffff() [ 59.056247] raw: 0100000000000200 ffff8880087a0c80 dead000000000122 0000000000000000 [ 59.057172] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800ded1a01 [ 59.058083] page dumped because: kasan: bad access detected [ 59.058741] [ 59.058970] Memory state around the buggy address: [ 59.059551] ffff88800dc56f00: fc fc fc 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 59.060401] ffff88800dc56f80: 00 00 fc fc fc fc fc fc fc fc fc fc fc fc fc fc [ 59.061250] >ffff88800dc57000: fa fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 59.062089] ^ [ 59.062816] ffff88800dc57080: fb fb fb fb fb fc fc fc fc fc fc fc fc fa fb fb [ 59.063691] ffff88800dc57100: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 59.064544] ================================================================== [ 59.065541] Disabling lock debugging due to kernel taint [ 61.303801] BUG: Bad rss-counter state mm:0000000084c5dfea type:MM_FILEPAGES val:33 [ 61.304811] BUG: Bad rss-counter state mm:0000000084c5dfea type:MM_ANONPAGES val:22 [ 61.889069] BUG: Bad rss-counter state mm:0000000048155b88 type:MM_FILEPAGES val:33 [ 61.890221] BUG: Bad rss-counter state mm:0000000048155b88 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:62961' (ECDSA) to the list of known hosts. 2023/06/21 07:26:55 fuzzer started 2023/06/21 07:26:55 dialing manager at localhost:36067 2023/06/21 07:26:55 checking machine... 2023/06/21 07:26:55 checking revisions... [ 62.489901] kmemleak: Automatic memory scanning thread ended 2023/06/21 07:26:55 testing simple program... [ 62.526538] cgroup: Unknown subsys name 'net' [ 62.568986] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 07:26:55 Registers: info registers vcpu 0 RAX=ffff88806ce35000 RBX=0000000000000000 RCX=ffffffff8451250e RDX=ffffed100d9c6a01 RSI=0000000000000004 RDI=ffffffff81288ac5 RBP=dffffc0000000000 RSP=ffffffff85407e10 R8 =0000000000000000 R9 =ffffed100d9c6a00 R10=ffff88806ce35003 R11=ffff888008c04000 R12=ffffffff85d3d350 R13=1ffffffff0a80fc7 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 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=00007fffe1b1fff8 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=00007efe6e37a5100000558364fd4790 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=dffffc0000000000 RBX=0000000000000003 RCX=0000000000000000 RDX=0000000000000000 RSI=ffffffff81b2bb6e RDI=ffff88801843cd80 RBP=ffff888018e96fa8 RSP=ffff888016ddf740 R8 =0000000000000005 R9 =000000000000009b R10=00000000000000a0 R11=00000000000b6a61 R12=ffff88801843cd00 R13=ffff88801843cd64 R14=0000000000000020 R15=ffff888018e96d34 RIP=ffffffff81b2bb8b 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 00007f8dcb523700 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=00007fbea24adf00 CR3=00000000142cc000 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=2034353a36323a3730203132206e754a XMM01=73732878696e755f6d6170203a5d3033 XMM02=65736f6c63206e6f6973736573203a29 XMM03=755f6d6170203a5d3033325b64687373 XMM04=69662068637573206f4e203a656c6163 XMM05=3a656c696620766e65206e65706f206f XMM06=65733a6468737328766e655f6d617020 XMM07=6b7a79732034353a36323a3730203132 XMM08=3d656e696c646d632022656369767265 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000