syzkaller login: [ 38.841006] BUG: Bad rss-counter state mm:00000000b659e399 type:MM_FILEPAGES val:33 [ 38.842479] BUG: Bad rss-counter state mm:00000000b659e399 type:MM_ANONPAGES val:22 [ 39.014185] ================================================================== [ 39.015103] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 39.016047] Read of size 8 at addr ffff8880096fadf0 by task sshd/219 [ 39.016832] [ 39.017051] CPU: 0 PID: 219 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 39.017958] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 39.018941] Call Trace: [ 39.019288] [ 39.019578] dump_stack_lvl+0x91/0xf0 [ 39.020076] print_report+0xcc/0x620 [ 39.020581] ? __virt_addr_valid+0x102/0x340 [ 39.021128] ? vma_interval_tree_remove+0xc75/0xec0 [ 39.021745] ? vma_interval_tree_remove+0xc75/0xec0 [ 39.022375] kasan_report+0xbe/0xf0 [ 39.022863] ? vma_interval_tree_remove+0xc75/0xec0 [ 39.023488] vma_interval_tree_remove+0xc75/0xec0 [ 39.024091] vma_prepare+0xc54/0x11a0 [ 39.024583] __split_vma+0x5af/0x950 [ 39.025053] ? __pfx___split_vma+0x10/0x10 [ 39.025575] ? find_held_lock+0x2c/0x110 [ 39.026090] do_vmi_align_munmap+0x2ba/0x11f0 [ 39.026653] ? lock_is_held_type+0x9f/0x120 [ 39.027191] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 39.027791] ? mtree_range_walk+0x632/0x900 [ 39.028366] ? mas_walk+0x5c7/0x7c0 [ 39.028837] do_vmi_munmap+0x1f1/0x2b0 [ 39.029328] mmap_region+0x1f9/0x2660 [ 39.029809] ? vm_mmap_pgoff+0x15c/0x3a0 [ 39.030327] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 39.031043] ? __pfx_lock_acquire+0x10/0x10 [ 39.031580] ? __pfx_mmap_region+0x10/0x10 [ 39.032105] ? security_mmap_addr+0x7d/0xa0 [ 39.032641] ? get_unmapped_area+0x1f5/0x3f0 [ 39.033190] do_mmap+0x854/0xf00 [ 39.033629] vm_mmap_pgoff+0x1a6/0x3a0 [ 39.034123] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 39.034692] ksys_mmap_pgoff+0x3af/0x500 [ 39.035202] do_syscall_64+0x3f/0x90 [ 39.035682] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 39.036340] RIP: 0033:0x7f238dbe0d82 [ 39.036797] 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 [ 39.038925] RSP: 002b:00007fff64c31158 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 39.039839] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f238dbe0d82 [ 39.040702] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f238d01a000 [ 39.041546] RBP: 00007f238d01a000 R08: 0000000000000009 R09: 0000000000001000 [ 39.042390] R10: 0000000000000812 R11: 0000000000000206 R12: 000055a5330bfec0 [ 39.043226] R13: 00007fff64c31170 R14: 00007fff64c311a0 R15: 00007fff64c31500 [ 39.044075] [ 39.044374] [ 39.044593] Allocated by task 211: [ 39.045018] kasan_save_stack+0x22/0x50 [ 39.045528] kasan_set_track+0x25/0x30 [ 39.046020] __kasan_slab_alloc+0x59/0x70 [ 39.046538] kmem_cache_alloc+0x16b/0x370 [ 39.047053] vm_area_dup+0x20/0x160 [ 39.047509] __split_vma+0x170/0x950 [ 39.047976] split_vma+0xc6/0x110 [ 39.048432] mprotect_fixup+0x8d2/0xb30 [ 39.048931] do_mprotect_pkey+0x87e/0xd40 [ 39.049450] __x64_sys_mprotect+0x78/0xc0 [ 39.049970] do_syscall_64+0x3f/0x90 [ 39.050444] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 39.051082] [ 39.051296] Freed by task 13: [ 39.051678] kasan_save_stack+0x22/0x50 [ 39.052176] kasan_set_track+0x25/0x30 [ 39.052681] kasan_save_free_info+0x2b/0x50 [ 39.053215] __kasan_slab_free+0x10a/0x190 [ 39.053745] kmem_cache_free+0x10d/0x4d0 [ 39.054258] rcu_core+0x8c8/0x2860 [ 39.054706] __do_softirq+0x1b7/0x7d4 [ 39.055182] [ 39.055396] Last potentially related work creation: [ 39.055977] kasan_save_stack+0x22/0x50 [ 39.056486] __kasan_record_aux_stack+0x8e/0xa0 [ 39.057065] __call_rcu_common.constprop.0+0x6a/0xb90 [ 39.057708] remove_vma+0x139/0x170 [ 39.058161] do_vmi_align_munmap+0xd4a/0x11f0 [ 39.058714] do_vmi_munmap+0x1f1/0x2b0 [ 39.059197] __vm_munmap+0x138/0x3a0 [ 39.059667] __x64_sys_munmap+0x59/0x80 [ 39.060166] do_syscall_64+0x3f/0x90 [ 39.060667] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 39.061316] [ 39.061529] The buggy address belongs to the object at ffff8880096fad98 [ 39.061529] which belongs to the cache vm_area_struct of size 168 [ 39.062992] The buggy address is located 88 bytes inside of [ 39.062992] freed 168-byte region [ffff8880096fad98, ffff8880096fae40) [ 39.064400] [ 39.064623] The buggy address belongs to the physical page: [ 39.065278] page:000000008f989fca refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x96fa [ 39.066473] memcg:ffff88800fb68901 [ 39.066972] flags: 0x100000000000200(slab|node=0|zone=1) [ 39.067716] page_type: 0xffffffff() [ 39.068230] raw: 0100000000000200 ffff8880087a0c80 ffffea000039f840 dead000000000006 [ 39.069270] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800fb68901 [ 39.070313] page dumped because: kasan: bad access detected [ 39.071017] [ 39.071230] Memory state around the buggy address: [ 39.071807] ffff8880096fac80: fc fc fc fc fc fc fa fb fb fb fb fb fb fb fb fb [ 39.072683] ffff8880096fad00: fb fb fb fb fb fb fb fb fb fb fb fc fc fc fc fc [ 39.073564] >ffff8880096fad80: fc fc fc fa fb fb fb fb fb fb fb fb fb fb fb fb [ 39.074420] ^ [ 39.075231] ffff8880096fae00: fb fb fb fb fb fb fb fb fc fc fc fc fc fc fc fc [ 39.076086] ffff8880096fae80: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 39.076945] ================================================================== [ 39.077966] Disabling lock debugging due to kernel taint [ 40.958221] BUG: Bad rss-counter state mm:0000000078c93ed4 type:MM_FILEPAGES val:33 [ 40.959449] BUG: Bad rss-counter state mm:0000000078c93ed4 type:MM_ANONPAGES val:22 [ 41.557530] BUG: Bad rss-counter state mm:0000000098b58fbb type:MM_FILEPAGES val:33 [ 41.558687] BUG: Bad rss-counter state mm:0000000098b58fbb type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:34997' (ECDSA) to the list of known hosts. 2023/06/21 01:56:19 fuzzer started 2023/06/21 01:56:19 dialing manager at localhost:36067 2023/06/21 01:56:19 checking machine... 2023/06/21 01:56:19 checking revisions... [ 42.211419] kmemleak: Automatic memory scanning thread ended 2023/06/21 01:56:20 testing simple program... [ 42.257150] cgroup: Unknown subsys name 'net' [ 42.293641] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 01:56:19 Registers: info registers vcpu 0 RAX=0000000080000000 RBX=ffff888015901488 RCX=ffffffff814526d1 RDX=ffff88801a19b680 RSI=0000000000000000 RDI=0000000000000001 RBP=dffffc0000000000 RSP=ffff888016c0fce8 R8 =0000000000000001 R9 =0000000000000000 R10=0000000000000001 R11=00000000000b6a61 R12=ffff8880143f4000 R13=ffff88801a19b680 R14=0000000000000000 R15=0000000000000001 RIP=ffffffff814c0261 RFL=00000246 [---Z-P-] 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 00007fdc7bb9d900 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=00007fdc7c154618 CR3=000000000db80000 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=6e69676f6c5f6d61702c78756e696c65 XMM02=755f6d61702c74696d7265705f6d6170 XMM03=2c766e655f6d61702c7374696d696c5f XMM04=6d61702c766e655f6d61702c7374696d XMM05=78696e755f6d61702c74696d7265705f XMM06=6469756e69676f6c5f6d61702c78756e XMM07=672065736f6c635f6e6f69737365733a XMM08=61662029286e65706f5f746964756100 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=1ffff1100d9e746e RBX=ffff88806cf3a360 RCX=ffffffff813780e4 RDX=1ffff1100d9e746c RSI=ffff888008e37dc8 RDI=ffff888008e37dd0 RBP=ffff88806cf3a370 RSP=ffff888008e37d18 R8 =0000000000000000 R9 =fffffbfff0ba7a6a R10=ffffffff85d3d357 R11=0000000000000000 R12=0000000000000001 R13=dffffc0000000000 R14=000000000000006a R15=ffff88806cf3a360 RIP=ffffffff81380c63 RFL=00000046 [---Z-P-] 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 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=00007f31c3a7bc70 CR3=000000000f206000 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=00000000000000000000000000000000 XMM01=be703c03eb4e92a9224d627b8cade365 XMM02=000000000011af68eff9b2d0a8fce9cb XMM03=000000000011b0382c67c8bc2e329bc3 XMM04=7273ab5db4c1babc00000000000ae988 XMM05=b6842050b7cea7c10000000000131db8 XMM06=806171799158d9670000000000131440 XMM07=e042d86d42eb936e0000000000121c70 XMM08=7c2d17f7182dbcf2000000000011b038 XMM09=00000000000000000000000000000000 XMM10=20200000000020202020202020200000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000