syzkaller login: [ 60.972955] BUG: Bad rss-counter state mm:00000000fd4be16f type:MM_FILEPAGES val:33 [ 60.974440] BUG: Bad rss-counter state mm:00000000fd4be16f type:MM_ANONPAGES val:22 [ 61.019469] ================================================================== [ 61.020432] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 61.021469] Read of size 8 at addr ffff888016c0c798 by task sshd/221 [ 61.022309] [ 61.022546] CPU: 1 PID: 221 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 61.023483] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 61.024540] Call Trace: [ 61.024900] [ 61.025234] dump_stack_lvl+0x91/0xf0 [ 61.025764] print_report+0xcc/0x620 [ 61.026280] ? __virt_addr_valid+0x102/0x340 [ 61.026886] ? vma_interval_tree_remove+0xc75/0xec0 [ 61.027558] ? vma_interval_tree_remove+0xc75/0xec0 [ 61.028231] kasan_report+0xbe/0xf0 [ 61.028750] ? vma_interval_tree_remove+0xc75/0xec0 [ 61.029413] vma_interval_tree_remove+0xc75/0xec0 [ 61.030058] vma_prepare+0xc54/0x11a0 [ 61.030568] __split_vma+0x5af/0x950 [ 61.031072] ? __pfx___split_vma+0x10/0x10 [ 61.031634] ? find_held_lock+0x2c/0x110 [ 61.032190] do_vmi_align_munmap+0x2ba/0x11f0 [ 61.032792] ? lock_is_held_type+0x9f/0x120 [ 61.033391] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 61.034038] ? mtree_range_walk+0x632/0x900 [ 61.034620] ? mas_walk+0x5c7/0x7c0 [ 61.035123] do_vmi_munmap+0x1f1/0x2b0 [ 61.035649] mmap_region+0x1f9/0x2660 [ 61.036165] ? vm_mmap_pgoff+0x15c/0x3a0 [ 61.036701] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 61.037469] ? __pfx_lock_acquire+0x10/0x10 [ 61.038034] ? __pfx_mmap_region+0x10/0x10 [ 61.038596] ? security_mmap_addr+0x7d/0xa0 [ 61.039160] ? get_unmapped_area+0x1f5/0x3f0 [ 61.039746] do_mmap+0x854/0xf00 [ 61.040211] vm_mmap_pgoff+0x1a6/0x3a0 [ 61.040734] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 61.041354] ksys_mmap_pgoff+0x3af/0x500 [ 61.041898] do_syscall_64+0x3f/0x90 [ 61.042413] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 61.043104] RIP: 0033:0x7f3d03226d82 [ 61.043587] 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 [ 61.045834] RSP: 002b:00007ffd241181a8 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 61.046785] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f3d03226d82 [ 61.047678] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f3d02660000 [ 61.048564] RBP: 00007f3d02660000 R08: 0000000000000009 R09: 0000000000001000 [ 61.049460] R10: 0000000000000812 R11: 0000000000000206 R12: 0000556f53a87ec0 [ 61.050347] R13: 00007ffd241181c0 R14: 00007ffd241181f0 R15: 00007ffd24118550 [ 61.051241] [ 61.051551] [ 61.051775] Allocated by task 214: [ 61.052229] kasan_save_stack+0x22/0x50 [ 61.052758] kasan_set_track+0x25/0x30 [ 61.053291] __kasan_slab_alloc+0x59/0x70 [ 61.053843] kmem_cache_alloc+0x16b/0x370 [ 61.054387] vm_area_dup+0x20/0x160 [ 61.054865] __split_vma+0x170/0x950 [ 61.055355] split_vma+0xc6/0x110 [ 61.055821] mprotect_fixup+0x8d2/0xb30 [ 61.056356] do_mprotect_pkey+0x87e/0xd40 [ 61.056899] __x64_sys_mprotect+0x78/0xc0 [ 61.057525] do_syscall_64+0x3f/0x90 [ 61.058014] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 61.058685] [ 61.058912] Freed by task 214: [ 61.059324] kasan_save_stack+0x22/0x50 [ 61.059847] kasan_set_track+0x25/0x30 [ 61.060359] kasan_save_free_info+0x2b/0x50 [ 61.060915] __kasan_slab_free+0x10a/0x190 [ 61.061483] kmem_cache_free+0x10d/0x4d0 [ 61.062013] rcu_core+0x8c8/0x2860 [ 61.062476] __do_softirq+0x1b7/0x7d4 [ 61.062975] [ 61.063201] Last potentially related work creation: [ 61.063812] kasan_save_stack+0x22/0x50 [ 61.064338] __kasan_record_aux_stack+0x8e/0xa0 [ 61.064936] __call_rcu_common.constprop.0+0x6a/0xb90 [ 61.065605] remove_vma+0x139/0x170 [ 61.066073] do_vmi_align_munmap+0xd4a/0x11f0 [ 61.066656] do_vmi_munmap+0x1f1/0x2b0 [ 61.067173] __vm_munmap+0x138/0x3a0 [ 61.067662] __x64_sys_munmap+0x59/0x80 [ 61.068184] do_syscall_64+0x3f/0x90 [ 61.068680] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 61.069354] [ 61.069579] Second to last potentially related work creation: [ 61.070289] kasan_save_stack+0x22/0x50 [ 61.070812] __kasan_record_aux_stack+0x8e/0xa0 [ 61.071415] __call_rcu_common.constprop.0+0x6a/0xb90 [ 61.072090] remove_vma+0x139/0x170 [ 61.072564] do_vmi_align_munmap+0xd4a/0x11f0 [ 61.073193] do_vmi_munmap+0x1f1/0x2b0 [ 61.073714] mmap_region+0x1f9/0x2660 [ 61.074227] do_mmap+0x854/0xf00 [ 61.074685] vm_mmap_pgoff+0x1a6/0x3a0 [ 61.075198] ksys_mmap_pgoff+0x3af/0x500 [ 61.075729] do_syscall_64+0x3f/0x90 [ 61.076232] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 61.076914] [ 61.077148] The buggy address belongs to the object at ffff888016c0c740 [ 61.077148] which belongs to the cache vm_area_struct of size 168 [ 61.078709] The buggy address is located 88 bytes inside of [ 61.078709] freed 168-byte region [ffff888016c0c740, ffff888016c0c7e8) [ 61.080205] [ 61.080432] The buggy address belongs to the physical page: [ 61.081152] page:00000000c99d770c refcount:1 mapcount:0 mapping:0000000000000000 index:0xffff888016c0ce80 pfn:0x16c0c [ 61.082476] memcg:ffff888016c0ea01 [ 61.082928] flags: 0x100000000000200(slab|node=0|zone=1) [ 61.083597] page_type: 0xffffffff() [ 61.084071] raw: 0100000000000200 ffff8880087a0c80 ffffea00003299c0 0000000000000006 [ 61.085091] raw: ffff888016c0ce80 0000000080110006 00000001ffffffff ffff888016c0ea01 [ 61.086162] page dumped because: kasan: bad access detected [ 61.086920] [ 61.087191] Memory state around the buggy address: [ 61.087872] ffff888016c0c680: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 61.088911] ffff888016c0c700: fc fc fc fc fc fc fc fc fa fb fb fb fb fb fb fb [ 61.089988] >ffff888016c0c780: fb fb fb fb fb fb fb fb fb fb fb fb fb fc fc fc [ 61.091050] ^ [ 61.091665] ffff888016c0c800: fc fc fc fc fc fb fb fb fb fb fb fb fb fb fb fb [ 61.092574] ffff888016c0c880: fb fb fb fb fb fb fb fb fb fb fc fc fc fc fc fc [ 61.093502] ================================================================== [ 61.094483] Disabling lock debugging due to kernel taint [ 63.324501] BUG: Bad rss-counter state mm:00000000ccde7d70 type:MM_FILEPAGES val:33 [ 63.325503] BUG: Bad rss-counter state mm:00000000ccde7d70 type:MM_ANONPAGES val:22 [ 63.739028] BUG: Bad rss-counter state mm:000000005746b8b0 type:MM_FILEPAGES val:33 [ 63.739975] BUG: Bad rss-counter state mm:000000005746b8b0 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:40666' (ECDSA) to the list of known hosts. 2023/06/20 18:31:20 fuzzer started 2023/06/20 18:31:20 dialing manager at localhost:36067 2023/06/20 18:31:20 checking machine... 2023/06/20 18:31:20 checking revisions... [ 64.428082] kmemleak: Automatic memory scanning thread ended 2023/06/20 18:31:20 testing simple program... [ 64.471829] cgroup: Unknown subsys name 'net' [ 64.536519] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 18:31:20 Registers: info registers vcpu 0 RAX=0000000000000000 RBX=0000000000000038 RCX=0000000000000000 RDX=ffffed1002ddbf86 RSI=00007fa3e01ab838 RDI=ffff888016edfc30 RBP=00007fa3e01ab838 RSP=ffff888016edfba8 R8 =0000000000000001 R9 =ffffed1002ddbf85 R10=ffff888016edfc2f R11=0000000000000000 R12=00007fa3e01ab800 R13=ffff888016edfbf8 R14=0000000000000000 R15=ffff888016edfcd8 RIP=ffffffff8217bb25 RFL=00040246 [---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 00007fa3e01af700 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=00007f0bc7bc80b0 CR3=000000000c616000 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=6d6f72662064657463656e6e6f637369 XMM02=2e303120746f6f722072657375206d6f XMM03=3a5d3033325b646873732039313a3133 XMM04=6456774875434142334f726f59427469 XMM05=485320415352203a3268737320343835 XMM06=206d6f726620746f6f7220726f662079 XMM07=00000000000000000000000000000000 XMM08=3a677562656420676f6c737973720000 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=ffff88806cf35000 RBX=0000000000000001 RCX=ffffffff8451250e RDX=ffffed100d9e6a01 RSI=0000000000000004 RDI=ffffffff81288ac5 RBP=dffffc0000000000 RSP=ffff888008e07e70 R8 =0000000000000000 R9 =ffffed100d9e6a00 R10=ffff88806cf35003 R11=0000000000000001 R12=ffffffff85d3d350 R13=1ffff110011c0fd3 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 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=00007f74901736d0 CR3=00000000098a8000 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=6b59d7a75fb30198a2448d3fec7bfe8e XMM02=000000000011d5a0eff9b2d0a8fce9cb XMM03=000000000011d6702c67c8bc2e329bc3 XMM04=a57fb082ac7a455a00000000000ae988 XMM05=e4cb8bb95a7664b60000000000132e60 XMM06=79cd7ad7f34b3e170000000000131cc8 XMM07=e042d86d42eb936e0000000000121f20 XMM08=6147fd4143df31bd000000000011d670 XMM09=00000000000000000000000000000000 XMM10=20200000000020202020202020200000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000