syzkaller login: [ 40.253210] BUG: Bad rss-counter state mm:00000000bb462a86 type:MM_FILEPAGES val:33 [ 40.254439] BUG: Bad rss-counter state mm:00000000bb462a86 type:MM_ANONPAGES val:22 [ 40.420272] ================================================================== [ 40.421217] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 40.422187] Read of size 8 at addr ffff88800eb255c8 by task sshd/220 [ 40.423090] [ 40.423314] CPU: 0 PID: 220 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 40.424217] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 40.425257] Call Trace: [ 40.425592] [ 40.425893] dump_stack_lvl+0x91/0xf0 [ 40.426404] print_report+0xcc/0x620 [ 40.426903] ? __virt_addr_valid+0x102/0x340 [ 40.427489] ? vma_interval_tree_remove+0xc75/0xec0 [ 40.428160] ? vma_interval_tree_remove+0xc75/0xec0 [ 40.428803] kasan_report+0xbe/0xf0 [ 40.429297] ? vma_interval_tree_remove+0xc75/0xec0 [ 40.429943] vma_interval_tree_remove+0xc75/0xec0 [ 40.430577] vma_prepare+0xc54/0x11a0 [ 40.431084] __split_vma+0x5af/0x950 [ 40.431583] ? __pfx___split_vma+0x10/0x10 [ 40.432148] ? find_held_lock+0x2c/0x110 [ 40.432695] do_vmi_align_munmap+0x2ba/0x11f0 [ 40.433284] ? lock_is_held_type+0x9f/0x120 [ 40.433852] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 40.434491] ? mtree_range_walk+0x632/0x900 [ 40.435069] ? mas_walk+0x5c7/0x7c0 [ 40.435564] do_vmi_munmap+0x1f1/0x2b0 [ 40.436110] mmap_region+0x1f9/0x2660 [ 40.436616] ? vm_mmap_pgoff+0x15c/0x3a0 [ 40.437152] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 40.437897] ? __pfx_lock_acquire+0x10/0x10 [ 40.438451] ? __pfx_mmap_region+0x10/0x10 [ 40.439007] ? security_mmap_addr+0x7d/0xa0 [ 40.439563] ? get_unmapped_area+0x1f5/0x3f0 [ 40.440149] do_mmap+0x854/0xf00 [ 40.440612] vm_mmap_pgoff+0x1a6/0x3a0 [ 40.441138] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 40.441733] ksys_mmap_pgoff+0x3af/0x500 [ 40.442270] do_syscall_64+0x3f/0x90 [ 40.442763] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 40.443447] RIP: 0033:0x7f6692da4d82 [ 40.443932] 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 [ 40.446217] RSP: 002b:00007ffe01f6d598 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 40.447170] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f6692da4d82 [ 40.448076] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f66921de000 [ 40.448986] RBP: 00007f66921de000 R08: 0000000000000009 R09: 0000000000001000 [ 40.449878] R10: 0000000000000812 R11: 0000000000000206 R12: 000055575adbaec0 [ 40.450771] R13: 00007ffe01f6d5b0 R14: 00007ffe01f6d5e0 R15: 00007ffe01f6d940 [ 40.451678] [ 40.451994] [ 40.452220] Allocated by task 213: [ 40.452665] kasan_save_stack+0x22/0x50 [ 40.453191] kasan_set_track+0x25/0x30 [ 40.453718] __kasan_slab_alloc+0x59/0x70 [ 40.454261] kmem_cache_alloc+0x16b/0x370 [ 40.454799] vm_area_dup+0x20/0x160 [ 40.455275] __split_vma+0x170/0x950 [ 40.455766] split_vma+0xc6/0x110 [ 40.456241] mprotect_fixup+0x8d2/0xb30 [ 40.456766] do_mprotect_pkey+0x87e/0xd40 [ 40.457341] __x64_sys_mprotect+0x78/0xc0 [ 40.457888] do_syscall_64+0x3f/0x90 [ 40.458387] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 40.459070] [ 40.459297] Freed by task 13: [ 40.459702] kasan_save_stack+0x22/0x50 [ 40.460233] kasan_set_track+0x25/0x30 [ 40.460746] kasan_save_free_info+0x2b/0x50 [ 40.461302] __kasan_slab_free+0x10a/0x190 [ 40.461854] kmem_cache_free+0x10d/0x4d0 [ 40.462384] rcu_core+0x8c8/0x2860 [ 40.462847] __do_softirq+0x1b7/0x7d4 [ 40.463342] [ 40.463569] Last potentially related work creation: [ 40.464205] kasan_save_stack+0x22/0x50 [ 40.464732] __kasan_record_aux_stack+0x8e/0xa0 [ 40.465337] __call_rcu_common.constprop.0+0x6a/0xb90 [ 40.466014] remove_vma+0x139/0x170 [ 40.466489] do_vmi_align_munmap+0xd4a/0x11f0 [ 40.467074] do_vmi_munmap+0x1f1/0x2b0 [ 40.467588] __vm_munmap+0x138/0x3a0 [ 40.468084] __x64_sys_munmap+0x59/0x80 [ 40.468610] do_syscall_64+0x3f/0x90 [ 40.469100] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 40.469773] [ 40.469994] The buggy address belongs to the object at ffff88800eb25570 [ 40.469994] which belongs to the cache vm_area_struct of size 168 [ 40.471549] The buggy address is located 88 bytes inside of [ 40.471549] freed 168-byte region [ffff88800eb25570, ffff88800eb25618) [ 40.473033] [ 40.473267] The buggy address belongs to the physical page: [ 40.473949] page:00000000d2d4dc2a refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xeb25 [ 40.475059] memcg:ffff88800d74b801 [ 40.475512] flags: 0x100000000000200(slab|node=0|zone=1) [ 40.476212] page_type: 0xffffffff() [ 40.476672] raw: 0100000000000200 ffff88800879fc80 dead000000000122 0000000000000000 [ 40.477623] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800d74b801 [ 40.478562] page dumped because: kasan: bad access detected [ 40.479236] [ 40.479456] Memory state around the buggy address: [ 40.480064] ffff88800eb25480: fc 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 40.480938] ffff88800eb25500: 00 00 00 00 00 00 fc fc fc fc fc fc fc fc fa fb [ 40.481796] >ffff88800eb25580: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 40.482663] ^ [ 40.483336] ffff88800eb25600: fb fb fb fc fc fc fc fc fc fc fc fa fb fb fb fb [ 40.484205] ffff88800eb25680: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 40.485078] ================================================================== [ 40.486441] Disabling lock debugging due to kernel taint [ 42.580222] BUG: Bad rss-counter state mm:00000000989ba7c4 type:MM_FILEPAGES val:33 [ 42.580896] BUG: Bad rss-counter state mm:00000000989ba7c4 type:MM_ANONPAGES val:22 [ 42.965240] BUG: Bad rss-counter state mm:00000000e751604e type:MM_FILEPAGES val:33 [ 42.965905] BUG: Bad rss-counter state mm:00000000e751604e type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:44079' (ECDSA) to the list of known hosts. 2023/06/20 09:45:34 fuzzer started 2023/06/20 09:45:34 dialing manager at localhost:44161 2023/06/20 09:45:34 checking machine... 2023/06/20 09:45:34 checking revisions... [ 43.580452] kmemleak: Automatic memory scanning thread ended 2023/06/20 09:45:34 testing simple program... [ 43.610483] cgroup: Unknown subsys name 'net' [ 43.652930] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 09:45:24 Registers: info registers vcpu 0 RAX=1ffffffff0c1706e RBX=0000000000000001 RCX=ffffffff860b8374 RDX=dffffc0000000000 RSI=0000000000000000 RDI=0000000000000001 RBP=ffff88806ce09af0 RSP=ffff88806ce09a28 R8 =ffffffff860b8378 R9 =ffff88806ce09ad8 R10=0000000000038001 R11=000000000000ba99 R12=ffff88806ce09af8 R13=ffff88806ce09ae0 R14=ffffffff85407ed0 R15=ffff88806ce09a98 RIP=ffffffff81130b73 RFL=00000213 [----A-C] 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 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=00007f697ad6fa60 CR3=00000000141f6000 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=45426d7798deeabf1c42d4e27c5e455c XMM02=000000000011d810ec2efd57dc4c00df XMM03=00000000001245b80a670c3242aa119c XMM04=099b0572254f0d9b00000000000ae988 XMM05=8b58ad501bfd73960000000000134f00 XMM06=4fda316b135da52b0000000000133fa0 XMM07=e042d86d42eb936e0000000000124838 XMM08=0a670c3242aa119c000000000011d870 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=ffff88806cf09e68 RBX=0000000000000002 RCX=0000000000000001 RDX=1ffff1100d9e1358 RSI=ffffffff813782a8 RDI=ffff88806cf09a78 RBP=ffff88806cf09ad0 RSP=ffff88806cf09a08 R8 =0000000000000001 R9 =ffff88806cf09ab8 R10=0000000000038001 R11=00000000000244c3 R12=ffff88806cf09b40 R13=ffff88806cf09ac0 R14=ffff8880142051c0 R15=ffff88806cf09a78 RIP=ffffffff81130664 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 00007fd987fde900 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=00007ffccf67c000 CR3=000000000e9bc000 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=635f6e6f69737365733a4d41503d706f XMM01=6f6c5f6d61702c78756e696c65735f6d XMM02=61702c74696d7265705f6d61702c7469 XMM03=655f6d61702c7374696d696c5f6d6170 XMM04=3d6c616e696d72657420322e322e302e XMM05=3d656d616e74736f682022646873732f XMM06=746f6f72223d746363612078756e696c XMM07=6e655f6d61702c7374696d696c5f6d61 XMM08=652075253d64692073253d706f000000 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000