syzkaller login: [ 31.340973] BUG: Bad rss-counter state mm:0000000057eaf73e type:MM_FILEPAGES val:33 [ 31.342466] BUG: Bad rss-counter state mm:0000000057eaf73e type:MM_ANONPAGES val:22 [ 31.500936] ================================================================== [ 31.501843] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 31.502775] Read of size 8 at addr ffff88800ec114e0 by task sshd/220 [ 31.503529] [ 31.503743] CPU: 0 PID: 220 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 31.504678] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 31.505652] Call Trace: [ 31.506009] [ 31.506307] dump_stack_lvl+0x91/0xf0 [ 31.506797] print_report+0xcc/0x620 [ 31.507286] ? __virt_addr_valid+0x102/0x340 [ 31.507846] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.508465] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.509076] kasan_report+0xbe/0xf0 [ 31.509558] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.510181] vma_interval_tree_remove+0xc75/0xec0 [ 31.510778] vma_prepare+0xc54/0x11a0 [ 31.511253] __split_vma+0x5af/0x950 [ 31.511723] ? __pfx___split_vma+0x10/0x10 [ 31.512241] ? find_held_lock+0x2c/0x110 [ 31.512757] do_vmi_align_munmap+0x2ba/0x11f0 [ 31.513322] ? lock_is_held_type+0x9f/0x120 [ 31.513855] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 31.514483] ? mtree_range_walk+0x632/0x900 [ 31.515028] ? mas_walk+0x5c7/0x7c0 [ 31.515497] do_vmi_munmap+0x1f1/0x2b0 [ 31.515984] mmap_region+0x1f9/0x2660 [ 31.516462] ? vm_mmap_pgoff+0x15c/0x3a0 [ 31.516964] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 31.517691] ? __pfx_lock_acquire+0x10/0x10 [ 31.518238] ? __pfx_mmap_region+0x10/0x10 [ 31.518764] ? security_mmap_addr+0x7d/0xa0 [ 31.519296] ? get_unmapped_area+0x1f5/0x3f0 [ 31.519871] do_mmap+0x854/0xf00 [ 31.520319] vm_mmap_pgoff+0x1a6/0x3a0 [ 31.520811] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 31.521376] ksys_mmap_pgoff+0x3af/0x500 [ 31.521877] do_syscall_64+0x3f/0x90 [ 31.522390] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.523047] RIP: 0033:0x7f56c4c1ad82 [ 31.523512] 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 [ 31.525636] RSP: 002b:00007ffdbae2a818 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 31.526541] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f56c4c1ad82 [ 31.527382] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f56c4054000 [ 31.528213] RBP: 00007f56c4054000 R08: 0000000000000009 R09: 0000000000001000 [ 31.529054] R10: 0000000000000812 R11: 0000000000000206 R12: 00005621bccf2ec0 [ 31.529898] R13: 00007ffdbae2a830 R14: 00007ffdbae2a860 R15: 00007ffdbae2abc0 [ 31.530757] [ 31.531048] [ 31.531264] Allocated by task 213: [ 31.531691] kasan_save_stack+0x22/0x50 [ 31.532195] kasan_set_track+0x25/0x30 [ 31.532681] __kasan_slab_alloc+0x59/0x70 [ 31.533195] kmem_cache_alloc+0x16b/0x370 [ 31.533705] vm_area_dup+0x20/0x160 [ 31.534164] __split_vma+0x170/0x950 [ 31.534627] split_vma+0xc6/0x110 [ 31.535066] mprotect_fixup+0x8d2/0xb30 [ 31.535565] do_mprotect_pkey+0x87e/0xd40 [ 31.536086] __x64_sys_mprotect+0x78/0xc0 [ 31.536611] do_syscall_64+0x3f/0x90 [ 31.537081] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.537720] [ 31.537931] Freed by task 203: [ 31.538328] kasan_save_stack+0x22/0x50 [ 31.538824] kasan_set_track+0x25/0x30 [ 31.539311] kasan_save_free_info+0x2b/0x50 [ 31.539837] __kasan_slab_free+0x10a/0x190 [ 31.540360] kmem_cache_free+0x10d/0x4d0 [ 31.540863] rcu_core+0x8c8/0x2860 [ 31.541308] __do_softirq+0x1b7/0x7d4 [ 31.541776] [ 31.541988] Last potentially related work creation: [ 31.542582] kasan_save_stack+0x22/0x50 [ 31.543079] __kasan_record_aux_stack+0x8e/0xa0 [ 31.543647] __call_rcu_common.constprop.0+0x6a/0xb90 [ 31.544279] remove_vma+0x139/0x170 [ 31.544726] do_vmi_align_munmap+0xd4a/0x11f0 [ 31.545277] do_vmi_munmap+0x1f1/0x2b0 [ 31.545758] __vm_munmap+0x138/0x3a0 [ 31.546237] __x64_sys_munmap+0x59/0x80 [ 31.546731] do_syscall_64+0x3f/0x90 [ 31.547202] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.547843] [ 31.548058] The buggy address belongs to the object at ffff88800ec11488 [ 31.548058] which belongs to the cache vm_area_struct of size 168 [ 31.549511] The buggy address is located 88 bytes inside of [ 31.549511] freed 168-byte region [ffff88800ec11488, ffff88800ec11530) [ 31.550915] [ 31.551133] The buggy address belongs to the physical page: [ 31.551787] page:00000000c3da8196 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xec11 [ 31.552859] memcg:ffff888009826c01 [ 31.553280] anon flags: 0x100000000000200(slab|node=0|zone=1) [ 31.553976] page_type: 0xffffffff() [ 31.554440] raw: 0100000000000200 ffff88800879fc80 ffffea0000275f40 dead000000000007 [ 31.555346] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff888009826c01 [ 31.556241] page dumped because: kasan: bad access detected [ 31.556898] [ 31.557111] Memory state around the buggy address: [ 31.557692] ffff88800ec11380: fc fc fc fc 00 00 00 00 00 00 00 00 00 00 00 00 [ 31.558544] ffff88800ec11400: 00 00 00 00 00 00 00 00 00 fc fc fc fc fc fc fc [ 31.559390] >ffff88800ec11480: fc fa fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 31.560239] ^ [ 31.560985] ffff88800ec11500: fb fb fb fb fb fb fc fc fc fc fc fc fc fc fa fb [ 31.561831] ffff88800ec11580: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 31.562675] ================================================================== [ 31.563638] Disabling lock debugging due to kernel taint [ 33.529685] BUG: Bad rss-counter state mm:000000009e823590 type:MM_FILEPAGES val:33 [ 33.530903] BUG: Bad rss-counter state mm:000000009e823590 type:MM_ANONPAGES val:22 [ 33.985873] BUG: Bad rss-counter state mm:00000000836fbc3b type:MM_FILEPAGES val:33 [ 33.987069] BUG: Bad rss-counter state mm:00000000836fbc3b type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:53518' (ECDSA) to the list of known hosts. 2023/06/19 11:06:16 fuzzer started 2023/06/19 11:06:17 dialing manager at localhost:44161 2023/06/19 11:06:17 checking machine... 2023/06/19 11:06:17 checking revisions... [ 34.689126] kmemleak: Automatic memory scanning thread ended 2023/06/19 11:06:17 testing simple program... [ 34.740199] cgroup: Unknown subsys name 'net' [ 34.777250] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 11:06:16 Registers: info registers vcpu 0 RAX=0000000000000007 RBX=ffff888019123680 RCX=0000000000000000 RDX=0000000000000000 RSI=ffffffff83ab4224 RDI=ffff888019123a74 RBP=ffff888019123680 RSP=ffff8880147ff4d8 R8 =0000000000000005 R9 =0000000000000000 R10=0000000000000000 R11=0000099300000993 R12=ffff888019123680 R13=00000000000000cc R14=dffffc0000000000 R15=ffffffff87f94640 RIP=ffffffff8137455a RFL=00000202 [-------] 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 00007f3642881900 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=00007f3642e38618 CR3=000000000f678000 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=6e69676f6c5f6d61702c78756e696c65 XMM02=755f6d61702c74696d7265705f6d6170 XMM03=2c766e655f6d61702c7374696d696c5f XMM04=6d61702c766e655f6d61702c7374696d XMM05=78696e755f6d61702c74696d7265705f XMM06=6469756e69676f6c5f6d61702c78756e XMM07=672065736f6c635f6e6f69737365733a XMM08=61662029286e65706f5f746964756100 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=00007f7231e66680 CR3=000000000d720000 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=d047a849f8511e8e5e4c31f7a79f062d XMM02=2c67c8bc2e329bc3000000000011edd8 XMM03=fb795ef6d65770560000000000126248 XMM04=d20eb606e53ba59200000000000ae988 XMM05=19e9129bd510f23500000000001356f0 XMM06=4fda316b135da52b0000000000135578 XMM07=e042d86d42eb936e00000000001264c8 XMM08=cdaa7c48707510b9000000000011ee38 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000