syzkaller login: [ 30.882760] BUG: Bad rss-counter state mm:000000003f91a031 type:MM_FILEPAGES val:33 [ 30.884089] BUG: Bad rss-counter state mm:000000003f91a031 type:MM_ANONPAGES val:22 [ 30.921323] ================================================================== [ 30.922954] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 30.924579] Read of size 8 at addr ffff888018eaf968 by task sshd/220 [ 30.925939] [ 30.926245] CPU: 1 PID: 220 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 30.927797] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 30.929494] Call Trace: [ 30.930043] [ 30.930458] dump_stack_lvl+0x91/0xf0 [ 30.931270] print_report+0xcc/0x620 [ 30.932071] ? __virt_addr_valid+0x102/0x340 [ 30.933064] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.933956] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.935041] kasan_report+0xbe/0xf0 [ 30.935731] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.936622] vma_interval_tree_remove+0xc75/0xec0 [ 30.937484] vma_prepare+0xc54/0x11a0 [ 30.938166] __split_vma+0x5af/0x950 [ 30.938850] ? __pfx___split_vma+0x10/0x10 [ 30.939619] ? find_held_lock+0x2c/0x110 [ 30.940359] do_vmi_align_munmap+0x2ba/0x11f0 [ 30.941172] ? lock_is_held_type+0x9f/0x120 [ 30.941946] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 30.942819] ? mtree_range_walk+0x632/0x900 [ 30.943628] ? mas_walk+0x5c7/0x7c0 [ 30.944310] do_vmi_munmap+0x1f1/0x2b0 [ 30.945018] mmap_region+0x1f9/0x2660 [ 30.945708] ? vm_mmap_pgoff+0x15c/0x3a0 [ 30.946439] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 30.947454] ? __pfx_lock_acquire+0x10/0x10 [ 30.948227] ? __pfx_mmap_region+0x10/0x10 [ 30.948987] ? security_mmap_addr+0x7d/0xa0 [ 30.949748] ? get_unmapped_area+0x1f5/0x3f0 [ 30.950534] do_mmap+0x854/0xf00 [ 30.951149] vm_mmap_pgoff+0x1a6/0x3a0 [ 30.951880] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 30.952682] ksys_mmap_pgoff+0x3af/0x500 [ 30.953420] do_syscall_64+0x3f/0x90 [ 30.954110] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.955040] RIP: 0033:0x7fbd199d3d82 [ 30.955707] 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 [ 30.958875] RSP: 002b:00007ffc8c95b6f8 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 30.960211] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007fbd199d3d82 [ 30.961431] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007fbd18e0d000 [ 30.962663] RBP: 00007fbd18e0d000 R08: 0000000000000009 R09: 0000000000001000 [ 30.963877] R10: 0000000000000812 R11: 0000000000000206 R12: 000055def525eec0 [ 30.965097] R13: 00007ffc8c95b710 R14: 00007ffc8c95b740 R15: 00007ffc8c95baa0 [ 30.966339] [ 30.966748] [ 30.967049] Allocated by task 213: [ 30.967657] kasan_save_stack+0x22/0x50 [ 30.968364] kasan_set_track+0x25/0x30 [ 30.969061] __kasan_slab_alloc+0x59/0x70 [ 30.969808] kmem_cache_alloc+0x16b/0x370 [ 30.970538] vm_area_dup+0x20/0x160 [ 30.971179] __split_vma+0x170/0x950 [ 30.971868] split_vma+0xc6/0x110 [ 30.972503] mprotect_fixup+0x8d2/0xb30 [ 30.973216] do_mprotect_pkey+0x87e/0xd40 [ 30.973950] __x64_sys_mprotect+0x78/0xc0 [ 30.974688] do_syscall_64+0x3f/0x90 [ 30.975366] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.976295] [ 30.976590] Freed by task 203: [ 30.977148] kasan_save_stack+0x22/0x50 [ 30.977851] kasan_set_track+0x25/0x30 [ 30.978552] kasan_save_free_info+0x2b/0x50 [ 30.979313] __kasan_slab_free+0x10a/0x190 [ 30.980057] kmem_cache_free+0x10d/0x4d0 [ 30.980772] rcu_core+0x8c8/0x2860 [ 30.981397] __do_softirq+0x1b7/0x7d4 [ 30.982074] [ 30.982372] Last potentially related work creation: [ 30.983482] kasan_save_stack+0x22/0x50 [ 30.984201] __kasan_record_aux_stack+0x8e/0xa0 [ 30.985026] __call_rcu_common.constprop.0+0x6a/0xb90 [ 30.985944] remove_vma+0x139/0x170 [ 30.986580] do_vmi_align_munmap+0xd4a/0x11f0 [ 30.987375] do_vmi_munmap+0x1f1/0x2b0 [ 30.988066] __vm_munmap+0x138/0x3a0 [ 30.988722] __x64_sys_munmap+0x59/0x80 [ 30.989421] do_syscall_64+0x3f/0x90 [ 30.990094] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.991003] [ 30.991320] The buggy address belongs to the object at ffff888018eaf910 [ 30.991320] which belongs to the cache vm_area_struct of size 168 [ 30.993461] The buggy address is located 88 bytes inside of [ 30.993461] freed 168-byte region [ffff888018eaf910, ffff888018eaf9b8) [ 30.995518] [ 30.995820] The buggy address belongs to the physical page: [ 30.996763] page:0000000042315715 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x18eaf [ 30.998301] memcg:ffff888015e9e501 [ 30.998898] flags: 0x100000000000200(slab|node=0|zone=1) [ 30.999817] page_type: 0xffffffff() [ 31.000447] raw: 0100000000000200 ffff8880087a0c80 dead000000000122 0000000000000000 [ 31.001743] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff888015e9e501 [ 31.003041] page dumped because: kasan: bad access detected [ 31.003998] [ 31.004292] Memory state around the buggy address: [ 31.005109] ffff888018eaf800: fc fc fc fc fc 00 00 00 00 00 00 00 00 00 00 00 [ 31.006341] ffff888018eaf880: 00 00 00 00 00 00 00 00 00 00 fc fc fc fc fc fc [ 31.007569] >ffff888018eaf900: fc fc fa fb fb fb fb fb fb fb fb fb fb fb fb fb [ 31.008775] ^ [ 31.009883] ffff888018eaf980: fb fb fb fb fb fb fb fc fc fc fc fc fc fc fc fa [ 31.011107] ffff888018eafa00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 31.012332] ================================================================== [ 31.013658] Disabling lock debugging due to kernel taint [ 32.960127] BUG: Bad rss-counter state mm:000000005d8ddc13 type:MM_FILEPAGES val:33 [ 32.961209] BUG: Bad rss-counter state mm:000000005d8ddc13 type:MM_ANONPAGES val:22 [ 33.526773] BUG: Bad rss-counter state mm:000000006949492f type:MM_FILEPAGES val:33 [ 33.527997] BUG: Bad rss-counter state mm:000000006949492f type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:47591' (ECDSA) to the list of known hosts. 2023/06/21 10:14:55 fuzzer started 2023/06/21 10:14:55 dialing manager at localhost:36067 2023/06/21 10:14:55 checking machine... 2023/06/21 10:14:55 checking revisions... [ 34.155525] kmemleak: Automatic memory scanning thread ended 2023/06/21 10:14:55 testing simple program... [ 34.211762] cgroup: Unknown subsys name 'net' [ 34.258385] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 10:14:55 Registers: info registers vcpu 0 RAX=ffff88806ce35000 RBX=0000000000000000 RCX=ffffffff8451250e RDX=ffffed100d9c6a01 RSI=0000000000000004 RDI=ffffffff81288ac5 RBP=dffffc0000000000 RSP=ffffffff85407e10 R8 =0000000000000000 R9 =ffffed100d9c6a00 R10=ffff88806ce35003 R11=ffff888008c04000 R12=ffffffff85d3d350 R13=1ffffffff0a80fc7 R14=0000000000000000 R15=0000000000000000 RIP=ffffffff8451349f 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=00007f1792ba19a0 CR3=00000000139fe000 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=1d80574af63d78bd604aa33e3446224b XMM02=000000000011a4d8eff9b2d0a8fce9cb XMM03=000000000011a5a82c67c8bc2e329bc3 XMM04=9eda2df732a1258c00000000000ae988 XMM05=19e9129bd510f2350000000000131940 XMM06=b920db11e003e88200000000001307a8 XMM07=e042d86d42eb936e0000000000121d40 XMM08=dc8e6debced2fd7f000000000011a5a8 XMM09=00000000000000000000000000000000 XMM10=20200000000020202020202020200000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=ffffffff85d3d358 RBX=ffff88800f010670 RCX=ffffffff81370ce8 RDX=0000000000000000 RSI=0000000000000008 RDI=ffffffff85d3d350 RBP=0000000000000200 RSP=ffff88806cf09dc0 R8 =0000000000000000 R9 =fffffbfff0ba7a6a R10=ffffffff85d3d357 R11=00000000000b6a61 R12=0000000000000001 R13=ffff88806cf3a3a8 R14=ffff88806cf3a2c0 R15=0000000000000000 RIP=ffffffff8180f03d RFL=00000082 [--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 00007f22a8219900 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=00007ffcbad6d000 CR3=000000000e59a000 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