syzkaller login: [ 30.151359] sshd (214) used greatest stack depth: 24128 bytes left [ 30.152312] BUG: Bad rss-counter state mm:000000003818afb7 type:MM_FILEPAGES val:33 [ 30.153514] BUG: Bad rss-counter state mm:000000003818afb7 type:MM_ANONPAGES val:22 [ 30.315078] ================================================================== [ 30.315988] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 30.316929] Read of size 8 at addr ffff888017cbb5c8 by task sshd/221 [ 30.317698] [ 30.317918] CPU: 0 PID: 221 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 30.318901] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 30.319876] Call Trace: [ 30.320209] [ 30.320500] dump_stack_lvl+0x91/0xf0 [ 30.321000] print_report+0xcc/0x620 [ 30.321488] ? __virt_addr_valid+0x102/0x340 [ 30.322078] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.322689] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.323302] kasan_report+0xbe/0xf0 [ 30.323780] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.324399] vma_interval_tree_remove+0xc75/0xec0 [ 30.324994] vma_prepare+0xc54/0x11a0 [ 30.325468] __split_vma+0x5af/0x950 [ 30.325944] ? __pfx___split_vma+0x10/0x10 [ 30.326465] ? find_held_lock+0x2c/0x110 [ 30.326984] do_vmi_align_munmap+0x2ba/0x11f0 [ 30.327547] ? lock_is_held_type+0x9f/0x120 [ 30.328082] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 30.328693] ? mtree_range_walk+0x632/0x900 [ 30.329272] ? mas_walk+0x5c7/0x7c0 [ 30.329772] do_vmi_munmap+0x1f1/0x2b0 [ 30.330287] mmap_region+0x1f9/0x2660 [ 30.330781] ? vm_mmap_pgoff+0x15c/0x3a0 [ 30.331324] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 30.332063] ? __pfx_lock_acquire+0x10/0x10 [ 30.332605] ? __pfx_mmap_region+0x10/0x10 [ 30.333145] ? security_mmap_addr+0x7d/0xa0 [ 30.333728] ? get_unmapped_area+0x1f5/0x3f0 [ 30.334302] do_mmap+0x854/0xf00 [ 30.334742] vm_mmap_pgoff+0x1a6/0x3a0 [ 30.335264] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 30.335852] ksys_mmap_pgoff+0x3af/0x500 [ 30.336374] do_syscall_64+0x3f/0x90 [ 30.336864] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.337543] RIP: 0033:0x7f3a417bcd82 [ 30.338027] 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 [ 30.340210] RSP: 002b:00007fff2b50ef88 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 30.341140] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f3a417bcd82 [ 30.342031] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f3a40bf6000 [ 30.342898] RBP: 00007f3a40bf6000 R08: 0000000000000009 R09: 0000000000001000 [ 30.343767] R10: 0000000000000812 R11: 0000000000000206 R12: 000056539396cf60 [ 30.344626] R13: 00007fff2b50efa0 R14: 00007fff2b50efd0 R15: 00007fff2b50f330 [ 30.345479] [ 30.345789] [ 30.346003] Allocated by task 214: [ 30.346438] kasan_save_stack+0x22/0x50 [ 30.346939] kasan_set_track+0x25/0x30 [ 30.347429] __kasan_slab_alloc+0x59/0x70 [ 30.347955] kmem_cache_alloc+0x16b/0x370 [ 30.348470] vm_area_dup+0x20/0x160 [ 30.348921] __split_vma+0x170/0x950 [ 30.349389] split_vma+0xc6/0x110 [ 30.349836] mprotect_fixup+0x8d2/0xb30 [ 30.350334] do_mprotect_pkey+0x87e/0xd40 [ 30.350857] __x64_sys_mprotect+0x78/0xc0 [ 30.351375] do_syscall_64+0x3f/0x90 [ 30.351851] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.352498] [ 30.352719] Freed by task 19: [ 30.353108] kasan_save_stack+0x22/0x50 [ 30.353685] kasan_set_track+0x25/0x30 [ 30.354157] kasan_save_free_info+0x2b/0x50 [ 30.354700] __kasan_slab_free+0x10a/0x190 [ 30.355246] kmem_cache_free+0x10d/0x4d0 [ 30.355757] rcu_core+0x8c8/0x2860 [ 30.356200] __do_softirq+0x1b7/0x7d4 [ 30.356686] [ 30.356901] Last potentially related work creation: [ 30.357486] kasan_save_stack+0x22/0x50 [ 30.358007] __kasan_record_aux_stack+0x8e/0xa0 [ 30.358584] __call_rcu_common.constprop.0+0x6a/0xb90 [ 30.359259] remove_vma+0x139/0x170 [ 30.359707] do_vmi_align_munmap+0xd4a/0x11f0 [ 30.360261] do_vmi_munmap+0x1f1/0x2b0 [ 30.360773] __vm_munmap+0x138/0x3a0 [ 30.361255] __x64_sys_munmap+0x59/0x80 [ 30.361759] do_syscall_64+0x3f/0x90 [ 30.362233] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.362875] [ 30.363091] The buggy address belongs to the object at ffff888017cbb570 [ 30.363091] which belongs to the cache vm_area_struct of size 168 [ 30.364549] The buggy address is located 88 bytes inside of [ 30.364549] freed 168-byte region [ffff888017cbb570, ffff888017cbb618) [ 30.365967] [ 30.366202] The buggy address belongs to the physical page: [ 30.366909] page:000000008b6cecb0 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x17cbb [ 30.368078] memcg:ffff8880144ecb01 [ 30.368523] flags: 0x100000000000200(slab|node=0|zone=1) [ 30.369208] page_type: 0xffffffff() [ 30.369666] raw: 0100000000000200 ffff8880087a0c80 dead000000000122 0000000000000000 [ 30.370614] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff8880144ecb01 [ 30.371536] page dumped because: kasan: bad access detected [ 30.372193] [ 30.372405] Memory state around the buggy address: [ 30.372976] ffff888017cbb480: fc 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 30.373831] ffff888017cbb500: 00 00 00 00 00 00 fc fc fc fc fc fc fc fc fa fb [ 30.374678] >ffff888017cbb580: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 30.375523] ^ [ 30.376183] ffff888017cbb600: fb fb fb fc fc fc fc fc fc fc fc fa fb fb fb fb [ 30.377060] ffff888017cbb680: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 30.377955] ================================================================== [ 30.379087] Disabling lock debugging due to kernel taint [ 33.125982] BUG: Bad rss-counter state mm:0000000049ba1b88 type:MM_FILEPAGES val:33 [ 33.126998] BUG: Bad rss-counter state mm:0000000049ba1b88 type:MM_ANONPAGES val:22 [ 33.619094] BUG: Bad rss-counter state mm:0000000097d2c83c type:MM_FILEPAGES val:33 [ 33.620471] BUG: Bad rss-counter state mm:0000000097d2c83c type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:61017' (ECDSA) to the list of known hosts. 2023/06/21 04:57:57 fuzzer started 2023/06/21 04:57:58 dialing manager at localhost:36067 2023/06/21 04:57:58 checking machine... 2023/06/21 04:57:58 checking revisions... [ 34.334393] kmemleak: Automatic memory scanning thread ended 2023/06/21 04:57:58 testing simple program... [ 34.380913] cgroup: Unknown subsys name 'net' [ 34.436555] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 04:57:57 Registers: info registers vcpu 0 RAX=0000000000000000 RBX=ffffffff854ee9e0 RCX=0000000000000000 RDX=1ffff11002cafb7c RSI=0000000000000066 RDI=ffffffff854ee9e0 RBP=1ffff110028c7ed6 RSP=ffff88801463f6b0 R8 =0000000000000004 R9 =0000000000000000 R10=00000000fffffffe R11=00000000000b6d53 R12=dffffc0000000000 R13=0000000000000000 R14=ffff88801657d978 R15=ffffffff854ee9e0 RIP=ffffffff8148265a 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 =0000 0000000000000000 00000000 00000000 DS =0000 0000000000000000 00000000 00000000 FS =0000 00007fb12776e900 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=00007fb126bb4be0 CR3=000000000cb32000 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=454d49544c4145525f454352554f535f XMM01=3d504d415453454d49545f454d49544c XMM02=ffffffffffffffffffffffffffffffff XMM03=2f6c616e72756f6a2f676f6c2f6e7572 XMM04=40022b6b68cea74c00000000000ae988 XMM05=f3f6f750732ec5fa0000000000132958 XMM06=c291bd5c70af25b900000000001319f8 XMM07=00000000000000000000000000000000 XMM08=415453454d49545f454d49544c414552 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=dffffc0000000000 RBX=0000000000000000 RCX=0000000000000000 RDX=ffff88801020b680 RSI=ffffffff814c8575 RDI=ffffffff8560b640 RBP=ffff88800ef3f978 RSP=ffff88800ef3f968 R8 =0000000000000005 R9 =0000000000000000 R10=0000000000000000 R11=00000000000b6a61 R12=ffffffff8560b640 R13=ffffffff814c8575 R14=ffffffff85652c08 R15=dffffc0000000000 RIP=ffffffff812d868c 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 00007f5680ed8900 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=00007ffeac716000 CR3=000000001a304000 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=00ff0000000000000000000000000000 XMM02=2f00646f6874656d5f74707972636e65 XMM03=5320444f4854454d5f54505952434e45 XMM04=40404040404040404040404040404040 XMM05=5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a XMM06=20202020202020202020202020202020 XMM07=ff00ffffffffffffffffffffffffffff XMM08=20002020202020200020202020202020 XMM09=0000ffffffffffffffffffffffffffff XMM10=00002020202020200020202020202020 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000