syzkaller login: [ 37.690644] BUG: Bad rss-counter state mm:00000000d572678d type:MM_FILEPAGES val:33 [ 37.691658] BUG: Bad rss-counter state mm:00000000d572678d type:MM_ANONPAGES val:22 [ 37.731025] ================================================================== [ 37.732027] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 37.733088] Read of size 8 at addr ffff888019a34310 by task sshd/219 [ 37.733864] [ 37.734080] CPU: 0 PID: 219 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 37.734942] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 37.735939] Call Trace: [ 37.736290] [ 37.736579] dump_stack_lvl+0x91/0xf0 [ 37.737069] print_report+0xcc/0x620 [ 37.737565] ? __virt_addr_valid+0x102/0x340 [ 37.738122] ? vma_interval_tree_remove+0xc75/0xec0 [ 37.738738] ? vma_interval_tree_remove+0xc75/0xec0 [ 37.739353] kasan_report+0xbe/0xf0 [ 37.739827] ? vma_interval_tree_remove+0xc75/0xec0 [ 37.740487] vma_interval_tree_remove+0xc75/0xec0 [ 37.741100] vma_prepare+0xc54/0x11a0 [ 37.741579] __split_vma+0x5af/0x950 [ 37.742055] ? __pfx___split_vma+0x10/0x10 [ 37.742597] ? find_held_lock+0x2c/0x110 [ 37.743133] do_vmi_align_munmap+0x2ba/0x11f0 [ 37.743712] ? lock_is_held_type+0x9f/0x120 [ 37.744277] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 37.744886] ? mtree_range_walk+0x632/0x900 [ 37.745436] ? mas_walk+0x5c7/0x7c0 [ 37.745911] do_vmi_munmap+0x1f1/0x2b0 [ 37.746399] mmap_region+0x1f9/0x2660 [ 37.746888] ? vm_mmap_pgoff+0x15c/0x3a0 [ 37.747400] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 37.748109] ? __pfx_lock_acquire+0x10/0x10 [ 37.748651] ? __pfx_mmap_region+0x10/0x10 [ 37.749191] ? security_mmap_addr+0x7d/0xa0 [ 37.749719] ? get_unmapped_area+0x1f5/0x3f0 [ 37.750273] do_mmap+0x854/0xf00 [ 37.750710] vm_mmap_pgoff+0x1a6/0x3a0 [ 37.751208] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 37.751765] ksys_mmap_pgoff+0x3af/0x500 [ 37.752285] do_syscall_64+0x3f/0x90 [ 37.752756] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 37.753409] RIP: 0033:0x7f1907146d82 [ 37.753866] 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 [ 37.755978] RSP: 002b:00007ffe33174528 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 37.756908] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f1907146d82 [ 37.757750] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f1906580000 [ 37.758598] RBP: 00007f1906580000 R08: 0000000000000009 R09: 0000000000001000 [ 37.759439] R10: 0000000000000812 R11: 0000000000000206 R12: 0000559b10900f70 [ 37.760286] R13: 00007ffe33174540 R14: 00007ffe33174570 R15: 00007ffe331748d0 [ 37.761140] [ 37.761432] [ 37.761650] Allocated by task 212: [ 37.762082] kasan_save_stack+0x22/0x50 [ 37.762593] kasan_set_track+0x25/0x30 [ 37.763084] __kasan_slab_alloc+0x59/0x70 [ 37.763614] kmem_cache_alloc+0x16b/0x370 [ 37.764128] vm_area_dup+0x20/0x160 [ 37.764584] __split_vma+0x170/0x950 [ 37.765047] split_vma+0xc6/0x110 [ 37.765493] mprotect_fixup+0x8d2/0xb30 [ 37.765991] do_mprotect_pkey+0x87e/0xd40 [ 37.766513] __x64_sys_mprotect+0x78/0xc0 [ 37.767035] do_syscall_64+0x3f/0x90 [ 37.767508] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 37.768156] [ 37.768394] Freed by task 212: [ 37.768787] kasan_save_stack+0x22/0x50 [ 37.769291] kasan_set_track+0x25/0x30 [ 37.769790] kasan_save_free_info+0x2b/0x50 [ 37.770323] __kasan_slab_free+0x10a/0x190 [ 37.770856] kmem_cache_free+0x10d/0x4d0 [ 37.771368] rcu_core+0x8c8/0x2860 [ 37.771812] __do_softirq+0x1b7/0x7d4 [ 37.772305] [ 37.772526] Last potentially related work creation: [ 37.773124] kasan_save_stack+0x22/0x50 [ 37.773630] __kasan_record_aux_stack+0x8e/0xa0 [ 37.774203] __call_rcu_common.constprop.0+0x6a/0xb90 [ 37.774851] remove_vma+0x139/0x170 [ 37.775315] do_vmi_align_munmap+0xd4a/0x11f0 [ 37.775873] do_vmi_munmap+0x1f1/0x2b0 [ 37.776378] __vm_munmap+0x138/0x3a0 [ 37.776846] __x64_sys_munmap+0x59/0x80 [ 37.777353] do_syscall_64+0x3f/0x90 [ 37.777825] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 37.778482] [ 37.778695] The buggy address belongs to the object at ffff888019a342b8 [ 37.778695] which belongs to the cache vm_area_struct of size 168 [ 37.780155] The buggy address is located 88 bytes inside of [ 37.780155] freed 168-byte region [ffff888019a342b8, ffff888019a34360) [ 37.781574] [ 37.781794] The buggy address belongs to the physical page: [ 37.782449] page:000000006de60560 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x19a34 [ 37.783527] memcg:ffff8880182dbe01 [ 37.783958] flags: 0x100000000000200(slab|node=0|zone=1) [ 37.784628] page_type: 0xffffffff() [ 37.785088] raw: 0100000000000200 ffff88800879fc80 dead000000000122 0000000000000000 [ 37.786009] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff8880182dbe01 [ 37.786913] page dumped because: kasan: bad access detected [ 37.787576] [ 37.787796] Memory state around the buggy address: [ 37.788394] ffff888019a34200: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 fc [ 37.789251] ffff888019a34280: fc fc fc fc fc fc fc fa fb fb fb fb fb fb fb fb [ 37.790116] >ffff888019a34300: fb fb fb fb fb fb fb fb fb fb fb fb fc fc fc fc [ 37.790974] ^ [ 37.791434] ffff888019a34380: fc fc fc fc fa fb fb fb fb fb fb fb fb fb fb fb [ 37.792295] ffff888019a34400: fb fb fb fb fb fb fb fb fb fc fc fc fc fc fc fc [ 37.793147] ================================================================== [ 37.794362] Disabling lock debugging due to kernel taint [ 39.668630] BUG: Bad rss-counter state mm:00000000001a9e35 type:MM_FILEPAGES val:33 [ 39.669566] BUG: Bad rss-counter state mm:00000000001a9e35 type:MM_ANONPAGES val:22 [ 40.138674] BUG: Bad rss-counter state mm:000000002955fcf7 type:MM_FILEPAGES val:33 [ 40.139826] BUG: Bad rss-counter state mm:000000002955fcf7 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:54124' (ECDSA) to the list of known hosts. 2023/06/20 05:51:27 fuzzer started 2023/06/20 05:51:27 dialing manager at localhost:44161 2023/06/20 05:51:27 checking machine... 2023/06/20 05:51:27 checking revisions... [ 40.871885] kmemleak: Automatic memory scanning thread ended 2023/06/20 05:51:27 testing simple program... [ 40.920270] cgroup: Unknown subsys name 'net' [ 40.956682] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 05:51:20 Registers: info registers vcpu 0 RAX=ffff88806ce35000 RBX=0000000000000000 RCX=ffffffff8450c50e RDX=ffffed100d9c6a01 RSI=0000000000000004 RDI=ffffffff812889a5 RBP=dffffc0000000000 RSP=ffffffff85407e10 R8 =0000000000000000 R9 =ffffed100d9c6a00 R10=ffff88806ce35003 R11=ffff888008c58000 R12=ffffffff85d3bed0 R13=1ffffffff0a80fc7 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 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=00007fe92ef78000 CR3=000000000f5d2000 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=d3b8ede171d416bbfa4b8e30e20ab1d9 XMM02=ec2efd57dc4c00df000000000011e6a8 XMM03=aa1092bd543b7975000000000011e778 XMM04=e4ac9c22369c8e8700000000000ae988 XMM05=943e9bc3ea38904e0000000000135920 XMM06=806171799158d9670000000000134a48 XMM07=e042d86d42eb936e00000000001252f0 XMM08=aa1092bd543b7975000000000011e778 XMM09=00000000000000000000000000000000 XMM10=20200000000020202020202020200000 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=00007fb4ed6a1618 CR3=0000000017400000 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=2037323a31353a3530203032206e754a XMM01=73732878696e755f6d6170203a5d3832 XMM02=65736f6c63206e6f6973736573203a29 XMM03=755f6d6170203a5d3832325b64687373 XMM04=69662068637573206f4e203a656c6163 XMM05=3a656c696620766e65206e65706f206f XMM06=65733a6468737328766e655f6d617020 XMM07=6b7a79732036323a31353a3530203032 XMM08=3d656e696c646d632022656369767265 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000