syzkaller login: [ 30.835705] BUG: Bad rss-counter state mm:000000009116f1e5 type:MM_FILEPAGES val:33 [ 30.837214] BUG: Bad rss-counter state mm:000000009116f1e5 type:MM_ANONPAGES val:22 [ 30.990626] ================================================================== [ 30.991551] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 30.992542] Read of size 8 at addr ffff88800e8df228 by task sshd/221 [ 30.993316] [ 30.993542] CPU: 1 PID: 221 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 30.994566] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 30.995565] Call Trace: [ 30.995925] <TASK> [ 30.996224] dump_stack_lvl+0x91/0xf0 [ 30.996733] print_report+0xcc/0x620 [ 30.997219] ? __virt_addr_valid+0x102/0x340 [ 30.997773] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.998397] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.999020] kasan_report+0xbe/0xf0 [ 30.999508] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.000160] vma_interval_tree_remove+0xc75/0xec0 [ 31.000783] vma_prepare+0xc54/0x11a0 [ 31.001276] __split_vma+0x5af/0x950 [ 31.001758] ? __pfx___split_vma+0x10/0x10 [ 31.002303] ? find_held_lock+0x2c/0x110 [ 31.002837] do_vmi_align_munmap+0x2ba/0x11f0 [ 31.003412] ? lock_is_held_type+0x9f/0x120 [ 31.004003] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 31.004627] ? mtree_range_walk+0x632/0x900 [ 31.005190] ? mas_walk+0x5c7/0x7c0 [ 31.005677] do_vmi_munmap+0x1f1/0x2b0 [ 31.006190] mmap_region+0x1f9/0x2660 [ 31.006693] ? vm_mmap_pgoff+0x15c/0x3a0 [ 31.007237] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 31.008009] ? __pfx_lock_acquire+0x10/0x10 [ 31.008573] ? __pfx_mmap_region+0x10/0x10 [ 31.009129] ? security_mmap_addr+0x7d/0xa0 [ 31.009666] ? get_unmapped_area+0x1f5/0x3f0 [ 31.010214] do_mmap+0x854/0xf00 [ 31.010673] vm_mmap_pgoff+0x1a6/0x3a0 [ 31.011172] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 31.011732] ksys_mmap_pgoff+0x3af/0x500 [ 31.012285] do_syscall_64+0x3f/0x90 [ 31.012774] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.013416] RIP: 0033:0x7fa73ea5bd82 [ 31.013881] 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 [ 31.016111] RSP: 002b:00007ffeff3d23f8 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 31.017064] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007fa73ea5bd82 [ 31.017914] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007fa73de95000 [ 31.018772] RBP: 00007fa73de95000 R08: 0000000000000009 R09: 0000000000001000 [ 31.019622] R10: 0000000000000812 R11: 0000000000000206 R12: 00005646aecdfd90 [ 31.020528] R13: 00007ffeff3d2410 R14: 00007ffeff3d2440 R15: 00007ffeff3d27a0 [ 31.021386] </TASK> [ 31.021675] [ 31.021888] Allocated by task 214: [ 31.022320] kasan_save_stack+0x22/0x50 [ 31.022826] kasan_set_track+0x25/0x30 [ 31.023361] __kasan_slab_alloc+0x59/0x70 [ 31.024004] kmem_cache_alloc+0x16b/0x370 [ 31.024613] vm_area_dup+0x20/0x160 [ 31.025150] __split_vma+0x170/0x950 [ 31.025698] split_vma+0xc6/0x110 [ 31.026214] mprotect_fixup+0x8d2/0xb30 [ 31.026800] do_mprotect_pkey+0x87e/0xd40 [ 31.027404] __x64_sys_mprotect+0x78/0xc0 [ 31.028045] do_syscall_64+0x3f/0x90 [ 31.028599] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.029354] [ 31.029606] Freed by task 214: [ 31.030064] kasan_save_stack+0x22/0x50 [ 31.030653] kasan_set_track+0x25/0x30 [ 31.031237] kasan_save_free_info+0x2b/0x50 [ 31.031882] __kasan_slab_free+0x10a/0x190 [ 31.032523] kmem_cache_free+0x10d/0x4d0 [ 31.033122] rcu_core+0x8c8/0x2860 [ 31.033641] __do_softirq+0x1b7/0x7d4 [ 31.034195] [ 31.034448] Last potentially related work creation: [ 31.035145] kasan_save_stack+0x22/0x50 [ 31.035799] __kasan_record_aux_stack+0x8e/0xa0 [ 31.036501] __call_rcu_common.constprop.0+0x6a/0xb90 [ 31.037259] remove_vma+0x139/0x170 [ 31.037791] do_vmi_align_munmap+0xd4a/0x11f0 [ 31.038453] do_vmi_munmap+0x1f1/0x2b0 [ 31.039025] __vm_munmap+0x138/0x3a0 [ 31.039568] __x64_sys_munmap+0x59/0x80 [ 31.040260] do_syscall_64+0x3f/0x90 [ 31.040833] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.041587] [ 31.041838] The buggy address belongs to the object at ffff88800e8df1d0 [ 31.041838] which belongs to the cache vm_area_struct of size 168 [ 31.043564] The buggy address is located 88 bytes inside of [ 31.043564] freed 168-byte region [ffff88800e8df1d0, ffff88800e8df278) [ 31.045225] [ 31.045483] The buggy address belongs to the physical page: [ 31.046256] page:000000005e95062b refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xe8df [ 31.047537] memcg:ffff888017534401 [ 31.048049] flags: 0x100000000000200(slab|node=0|zone=1) [ 31.048824] page_type: 0xffffffff() [ 31.049355] raw: 0100000000000200 ffff88800879fc80 dead000000000122 0000000000000000 [ 31.050479] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff888017534401 [ 31.051539] page dumped because: kasan: bad access detected [ 31.052312] [ 31.052525] Memory state around the buggy address: [ 31.053099] ffff88800e8df100: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 31.053955] ffff88800e8df180: 00 00 fc fc fc fc fc fc fc fc fa fb fb fb fb fb [ 31.054812] >ffff88800e8df200: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fc [ 31.055655] ^ [ 31.056215] ffff88800e8df280: fc fc fc fc fc fc fc fa fb fb fb fb fb fb fb fb [ 31.057062] ffff88800e8df300: fb fb fb fb fb fb fb fb fb fb fb fb fc fc fc fc [ 31.057908] ================================================================== [ 31.058926] Disabling lock debugging due to kernel taint [ 34.155123] BUG: Bad rss-counter state mm:000000007db0ded2 type:MM_FILEPAGES val:33 [ 34.156231] BUG: Bad rss-counter state mm:000000007db0ded2 type:MM_ANONPAGES val:22 [ 34.623798] BUG: Bad rss-counter state mm:000000003038cc76 type:MM_FILEPAGES val:33 [ 34.624962] BUG: Bad rss-counter state mm:000000003038cc76 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:20060' (ECDSA) to the list of known hosts. 2023/06/19 20:38:10 fuzzer started 2023/06/19 20:38:10 dialing manager at localhost:44161 2023/06/19 20:38:10 checking machine... 2023/06/19 20:38:10 checking revisions... [ 35.273184] kmemleak: Automatic memory scanning thread ended 2023/06/19 20:38:10 testing simple program... [ 35.315219] cgroup: Unknown subsys name 'net' [ 35.360143] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 20:38:08 Registers: info registers vcpu 0 RAX=dffffc0000000000 RBX=0000000000000cc0 RCX=ffffffff812d869a RDX=0000000000000000 RSI=0000000000000008 RDI=ffff8880183a9b6c RBP=ffff8880183a9b40 RSP=ffff888009c27cf8 R8 =0000000000000000 R9 =fffffbfff0ba77da R10=ffffffff85d3bed7 R11=0000000000000000 R12=ffff8880087b63c0 R13=0000000000000000 R14=00000000ffffff9c R15=ffffffff818953b0 RIP=ffffffff81787990 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 00007f2bec3e8900 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=00007ffed79dd000 CR3=000000001ca50000 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=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 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=00007fa263030c40 CR3=000000000d8e4000 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=2030313a38333a3032203931206e754a XMM01=73732878696e755f6d6170203a5d3033 XMM02=65736f6c63206e6f6973736573203a29 XMM03=755f6d6170203a5d3033325b64687373 XMM04=69662068637573206f4e203a656c6163 XMM05=3a656c696620766e65206e65706f206f XMM06=65733a6468737328766e655f6d617020 XMM07=6b7a79732039303a38333a3032203931 XMM08=3d656e696c646d632022656369767265 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000