syzkaller login: [ 31.800544] BUG: Bad rss-counter state mm:000000004bb867aa type:MM_FILEPAGES val:33 [ 31.801740] BUG: Bad rss-counter state mm:000000004bb867aa type:MM_ANONPAGES val:22 [ 31.951629] ================================================================== [ 31.952791] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 31.953728] Read of size 8 at addr ffff88800d50ab38 by task sshd/219 [ 31.954579] [ 31.954799] CPU: 0 PID: 219 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 31.955661] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 31.956648] Call Trace: [ 31.956966] [ 31.957247] dump_stack_lvl+0x91/0xf0 [ 31.957738] print_report+0xcc/0x620 [ 31.958240] ? __virt_addr_valid+0x102/0x340 [ 31.958799] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.959440] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.960072] kasan_report+0xbe/0xf0 [ 31.960564] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.961193] vma_interval_tree_remove+0xc75/0xec0 [ 31.961796] vma_prepare+0xc54/0x11a0 [ 31.962285] __split_vma+0x5af/0x950 [ 31.962757] ? __pfx___split_vma+0x10/0x10 [ 31.963292] ? find_held_lock+0x2c/0x110 [ 31.963816] do_vmi_align_munmap+0x2ba/0x11f0 [ 31.964400] ? lock_is_held_type+0x9f/0x120 [ 31.964947] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 31.965556] ? mtree_range_walk+0x632/0x900 [ 31.966111] ? mas_walk+0x5c7/0x7c0 [ 31.966584] do_vmi_munmap+0x1f1/0x2b0 [ 31.967081] mmap_region+0x1f9/0x2660 [ 31.967565] ? vm_mmap_pgoff+0x15c/0x3a0 [ 31.968089] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 31.968805] ? __pfx_lock_acquire+0x10/0x10 [ 31.969344] ? __pfx_mmap_region+0x10/0x10 [ 31.969872] ? security_mmap_addr+0x7d/0xa0 [ 31.970441] ? get_unmapped_area+0x1f5/0x3f0 [ 31.970987] do_mmap+0x854/0xf00 [ 31.971425] vm_mmap_pgoff+0x1a6/0x3a0 [ 31.971927] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 31.972507] ksys_mmap_pgoff+0x3af/0x500 [ 31.973026] do_syscall_64+0x3f/0x90 [ 31.973505] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.974153] RIP: 0033:0x7effcc009d82 [ 31.974607] 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 [ 31.976744] RSP: 002b:00007ffc2ddc9c78 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 31.977673] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007effcc009d82 [ 31.978521] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007effcb443000 [ 31.979365] RBP: 00007effcb443000 R08: 0000000000000009 R09: 0000000000001000 [ 31.980228] R10: 0000000000000812 R11: 0000000000000206 R12: 000055bc0a0b5ec0 [ 31.981088] R13: 00007ffc2ddc9c90 R14: 00007ffc2ddc9cc0 R15: 00007ffc2ddca020 [ 31.981954] [ 31.982251] [ 31.982471] Allocated by task 212: [ 31.982913] kasan_save_stack+0x22/0x50 [ 31.983439] kasan_set_track+0x25/0x30 [ 31.983933] __kasan_slab_alloc+0x59/0x70 [ 31.984475] kmem_cache_alloc+0x16b/0x370 [ 31.985000] vm_area_dup+0x20/0x160 [ 31.985459] __split_vma+0x170/0x950 [ 31.985934] split_vma+0xc6/0x110 [ 31.986376] mprotect_fixup+0x8d2/0xb30 [ 31.986885] do_mprotect_pkey+0x87e/0xd40 [ 31.987404] __x64_sys_mprotect+0x78/0xc0 [ 31.987926] do_syscall_64+0x3f/0x90 [ 31.988425] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.989065] [ 31.989282] Freed by task 212: [ 31.989680] kasan_save_stack+0x22/0x50 [ 31.990184] kasan_set_track+0x25/0x30 [ 31.990682] kasan_save_free_info+0x2b/0x50 [ 31.991216] __kasan_slab_free+0x10a/0x190 [ 31.991758] kmem_cache_free+0x10d/0x4d0 [ 31.992277] rcu_core+0x8c8/0x2860 [ 31.992723] __do_softirq+0x1b7/0x7d4 [ 31.993206] [ 31.993436] Last potentially related work creation: [ 31.994219] kasan_save_stack+0x22/0x50 [ 31.994892] __kasan_record_aux_stack+0x8e/0xa0 [ 31.995504] __call_rcu_common.constprop.0+0x6a/0xb90 [ 31.996175] remove_vma+0x139/0x170 [ 31.996629] do_vmi_align_munmap+0xd4a/0x11f0 [ 31.997182] do_vmi_munmap+0x1f1/0x2b0 [ 31.997672] __vm_munmap+0x138/0x3a0 [ 31.998136] __x64_sys_munmap+0x59/0x80 [ 31.998636] do_syscall_64+0x3f/0x90 [ 31.999111] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.999752] [ 31.999969] The buggy address belongs to the object at ffff88800d50aae0 [ 31.999969] which belongs to the cache vm_area_struct of size 168 [ 32.001433] The buggy address is located 88 bytes inside of [ 32.001433] freed 168-byte region [ffff88800d50aae0, ffff88800d50ab88) [ 32.002835] [ 32.003049] The buggy address belongs to the physical page: [ 32.003706] page:00000000387a35ac refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xd50a [ 32.004795] memcg:ffff88801003f601 [ 32.005224] flags: 0x100000000000200(slab|node=0|zone=1) [ 32.005874] page_type: 0xffffffff() [ 32.006326] raw: 0100000000000200 ffff88800879fc80 ffffea0000352d00 dead000000000006 [ 32.007245] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88801003f601 [ 32.008162] page dumped because: kasan: bad access detected [ 32.008820] [ 32.009036] Memory state around the buggy address: [ 32.009615] ffff88800d50aa00: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 32.010477] ffff88800d50aa80: 00 00 00 00 fc fc fc fc fc fc fc fc fa fb fb fb [ 32.011358] >ffff88800d50ab00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 32.012214] ^ [ 32.012826] ffff88800d50ab80: fb fc fc fc fc fc fc fc fc fa fb fb fb fb fb fb [ 32.013671] ffff88800d50ac00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fc fc [ 32.014513] ================================================================== [ 32.015549] Disabling lock debugging due to kernel taint [ 34.009874] BUG: Bad rss-counter state mm:000000008c83c492 type:MM_FILEPAGES val:33 [ 34.011050] BUG: Bad rss-counter state mm:000000008c83c492 type:MM_ANONPAGES val:22 [ 34.499699] BUG: Bad rss-counter state mm:000000000e30a8d7 type:MM_FILEPAGES val:33 [ 34.500883] BUG: Bad rss-counter state mm:000000000e30a8d7 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:65369' (ECDSA) to the list of known hosts. 2023/06/19 19:26:07 fuzzer started 2023/06/19 19:26:07 dialing manager at localhost:44161 2023/06/19 19:26:07 checking machine... 2023/06/19 19:26:07 checking revisions... [ 35.146988] kmemleak: Automatic memory scanning thread ended 2023/06/19 19:26:08 testing simple program... [ 35.200542] cgroup: Unknown subsys name 'net' [ 35.252584] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 19:26:06 Registers: info registers vcpu 0 RAX=ffffed1002d24edf RBX=1ffff11002d24edf RCX=0000000000000002 RDX=0000000000000000 RSI=0000000000000000 RDI=ffffffff8560b640 RBP=0000000000000000 RSP=ffff8880169276e8 R8 =0000000000000000 R9 =0000000000000000 R10=0000000000000000 R11=00000000000b6996 R12=0000000000000002 R13=0000000000000000 R14=ffffffff8560b640 R15=0000000000000000 RIP=ffffffff812d8e84 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 00007f00d89b6900 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=00007f00d8f6e0b0 CR3=000000001839c000 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=25252525252525252525252525252525 XMM01=000000000000000000000000000000ff XMM02=000000000000000000000000000000ff XMM03=5320444f4854454d5f54505952434e45 XMM04=40404040404040404040404040404040 XMM05=5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a XMM06=20202020202020202020202020202020 XMM07=00000000000000000000000000000000 XMM08=662079726f6d656d20666f2074756f00 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=00007f9a91407a10 CR3=000000000e546000 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=2037303a36323a3931203931206e754a XMM01=73732878696e755f6d6170203a5d3832 XMM02=65736f6c63206e6f6973736573203a29 XMM03=755f6d6170203a5d3832325b64687373 XMM04=69662068637573206f4e203a656c6163 XMM05=3a656c696620766e65206e65706f206f XMM06=65733a6468737328766e655f6d617020 XMM07=6b7a79732037303a36323a3931203931 XMM08=3d656e696c646d632022656369767265 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000