syzkaller login: [ 32.652719] BUG: Bad rss-counter state mm:00000000b53078e6 type:MM_FILEPAGES val:33 [ 32.654216] BUG: Bad rss-counter state mm:00000000b53078e6 type:MM_ANONPAGES val:22 [ 32.806921] ================================================================== [ 32.807877] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 32.808876] Read of size 8 at addr ffff888019a52d08 by task sshd/220 [ 32.809692] [ 32.809920] CPU: 0 PID: 220 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 32.810917] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 32.811948] Call Trace: [ 32.812279] [ 32.812693] dump_stack_lvl+0x91/0xf0 [ 32.813356] print_report+0xcc/0x620 [ 32.813996] ? __virt_addr_valid+0x102/0x340 [ 32.814716] ? vma_interval_tree_remove+0xc75/0xec0 [ 32.815531] ? vma_interval_tree_remove+0xc75/0xec0 [ 32.816349] kasan_report+0xbe/0xf0 [ 32.816962] ? vma_interval_tree_remove+0xc75/0xec0 [ 32.817781] vma_interval_tree_remove+0xc75/0xec0 [ 32.818572] vma_prepare+0xc54/0x11a0 [ 32.819185] __split_vma+0x5af/0x950 [ 32.819797] ? __pfx___split_vma+0x10/0x10 [ 32.820490] ? find_held_lock+0x2c/0x110 [ 32.821199] do_vmi_align_munmap+0x2ba/0x11f0 [ 32.821909] ? lock_is_held_type+0x9f/0x120 [ 32.822488] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 32.823134] ? mtree_range_walk+0x632/0x900 [ 32.823720] ? mas_walk+0x5c7/0x7c0 [ 32.824214] do_vmi_munmap+0x1f1/0x2b0 [ 32.824733] mmap_region+0x1f9/0x2660 [ 32.825254] ? vm_mmap_pgoff+0x15c/0x3a0 [ 32.825789] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 32.826544] ? __pfx_lock_acquire+0x10/0x10 [ 32.827107] ? __pfx_mmap_region+0x10/0x10 [ 32.827668] ? security_mmap_addr+0x7d/0xa0 [ 32.828227] ? get_unmapped_area+0x1f5/0x3f0 [ 32.828807] do_mmap+0x854/0xf00 [ 32.829275] vm_mmap_pgoff+0x1a6/0x3a0 [ 32.829798] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 32.830391] ksys_mmap_pgoff+0x3af/0x500 [ 32.830931] do_syscall_64+0x3f/0x90 [ 32.831431] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 32.832123] RIP: 0033:0x7f2780e39d82 [ 32.832606] 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 [ 32.834886] RSP: 002b:00007ffd73197198 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 32.835853] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f2780e39d82 [ 32.836762] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f2780273000 [ 32.837669] RBP: 00007f2780273000 R08: 0000000000000009 R09: 0000000000001000 [ 32.838554] R10: 0000000000000812 R11: 0000000000000206 R12: 000056386f39bec0 [ 32.839456] R13: 00007ffd731971b0 R14: 00007ffd731971e0 R15: 00007ffd73197540 [ 32.840357] [ 32.840669] [ 32.840894] Allocated by task 213: [ 32.841366] kasan_save_stack+0x22/0x50 [ 32.841898] kasan_set_track+0x25/0x30 [ 32.842415] __kasan_slab_alloc+0x59/0x70 [ 32.842967] kmem_cache_alloc+0x16b/0x370 [ 32.843507] vm_area_dup+0x20/0x160 [ 32.843986] __split_vma+0x170/0x950 [ 32.844472] split_vma+0xc6/0x110 [ 32.844943] mprotect_fixup+0x8d2/0xb30 [ 32.845483] do_mprotect_pkey+0x87e/0xd40 [ 32.846031] __x64_sys_mprotect+0x78/0xc0 [ 32.846575] do_syscall_64+0x3f/0x90 [ 32.847088] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 32.847763] [ 32.847990] Freed by task 213: [ 32.848403] kasan_save_stack+0x22/0x50 [ 32.848931] kasan_set_track+0x25/0x30 [ 32.849457] kasan_save_free_info+0x2b/0x50 [ 32.850026] __kasan_slab_free+0x10a/0x190 [ 32.850592] kmem_cache_free+0x10d/0x4d0 [ 32.851137] rcu_core+0x8c8/0x2860 [ 32.851608] __do_softirq+0x1b7/0x7d4 [ 32.852120] [ 32.852349] Last potentially related work creation: [ 32.852973] kasan_save_stack+0x22/0x50 [ 32.853524] __kasan_record_aux_stack+0x8e/0xa0 [ 32.854133] __call_rcu_common.constprop.0+0x6a/0xb90 [ 32.854806] remove_vma+0x139/0x170 [ 32.855282] do_vmi_align_munmap+0xd4a/0x11f0 [ 32.855865] do_vmi_munmap+0x1f1/0x2b0 [ 32.856381] __vm_munmap+0x138/0x3a0 [ 32.856881] __x64_sys_munmap+0x59/0x80 [ 32.857417] do_syscall_64+0x3f/0x90 [ 32.857916] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 32.858597] [ 32.858824] The buggy address belongs to the object at ffff888019a52cb0 [ 32.858824] which belongs to the cache vm_area_struct of size 168 [ 32.860387] The buggy address is located 88 bytes inside of [ 32.860387] freed 168-byte region [ffff888019a52cb0, ffff888019a52d58) [ 32.861854] [ 32.862069] The buggy address belongs to the physical page: [ 32.862723] page:0000000068df64f9 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x19a52 [ 32.863823] memcg:ffff8880196b9801 [ 32.864257] flags: 0x100000000000200(slab|node=0|zone=1) [ 32.864897] page_type: 0xffffffff() [ 32.865358] raw: 0100000000000200 ffff88800879fc80 dead000000000122 0000000000000000 [ 32.866272] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff8880196b9801 [ 32.867193] page dumped because: kasan: bad access detected [ 32.867869] [ 32.868083] Memory state around the buggy address: [ 32.868662] ffff888019a52c00: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 fc fc [ 32.869539] ffff888019a52c80: fc fc fc fc fc fc fa fb fb fb fb fb fb fb fb fb [ 32.870398] >ffff888019a52d00: fb fb fb fb fb fb fb fb fb fb fb fc fc fc fc fc [ 32.871249] ^ [ 32.871690] ffff888019a52d80: fc fc fc fa fb fb fb fb fb fb fb fb fb fb fb fb [ 32.872555] ffff888019a52e00: fb fb fb fb fb fb fb fb fc fc fc fc fc fc fc fc [ 32.873419] ================================================================== [ 32.874738] Disabling lock debugging due to kernel taint [ 34.830186] BUG: Bad rss-counter state mm:0000000005d41e4a type:MM_FILEPAGES val:33 [ 34.831454] BUG: Bad rss-counter state mm:0000000005d41e4a type:MM_ANONPAGES val:22 [ 35.235845] BUG: Bad rss-counter state mm:000000001eed481c type:MM_FILEPAGES val:33 [ 35.236793] BUG: Bad rss-counter state mm:000000001eed481c type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:46368' (ECDSA) to the list of known hosts. 2023/06/19 22:36:51 fuzzer started 2023/06/19 22:36:51 dialing manager at localhost:44161 2023/06/19 22:36:51 checking machine... 2023/06/19 22:36:51 checking revisions... [ 35.977226] kmemleak: Automatic memory scanning thread ended 2023/06/19 22:36:51 testing simple program... [ 36.031795] cgroup: Unknown subsys name 'net' [ 36.065250] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 22:36:50 Registers: info registers vcpu 0 RAX=dffffc0000000000 RBX=0000000000000000 RCX=0000000000000000 RDX=0000000000000000 RSI=ffffffff815c9138 RDI=ffff88806ce34c84 RBP=ffff88806ce34b60 RSP=ffff88806ce09d20 R8 =0000000000000005 R9 =0000000000000000 R10=0000000000000000 R11=0000000000000001 R12=0000000000000000 R13=ffff88806ce39518 R14=ffff88806ce34b60 R15=ffff888014730000 RIP=ffffffff815c9154 RFL=00000017 [----APC] 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 00007f71749ec900 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=00007f7173e3d270 CR3=000000000c900000 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=35359bb63408de6000000000000ae988 XMM05=e1f5fb50026097340000000000134de0 XMM06=19e9129bd510f2350000000000133c98 XMM07=00000000000000000000000000000000 XMM08=415453454d49545f454d49544c414552 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=00007ffd4238ea68 CR3=0000000018cba000 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=2031353a36333a3232203931206e754a XMM01=73732878696e755f6d6170203a5d3932 XMM02=65736f6c63206e6f6973736573203a29 XMM03=755f6d6170203a5d3932325b64687373 XMM04=69662068637573206f4e203a656c6163 XMM05=3a656c696620766e65206e65706f206f XMM06=65733a6468737328766e655f6d617020 XMM07=6b7a79732031353a36333a3232203931 XMM08=3d656e696c646d632022656369767265 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000