syzkaller login: [ 60.819827] BUG: Bad rss-counter state mm:00000000a5035d85 type:MM_FILEPAGES val:33 [ 60.821757] BUG: Bad rss-counter state mm:00000000a5035d85 type:MM_ANONPAGES val:22 [ 61.004069] ================================================================== [ 61.005100] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 61.006147] Read of size 8 at addr ffff888019f3ca50 by task sshd/219 [ 61.007088] [ 61.007334] CPU: 0 PID: 219 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 61.008301] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 61.009433] Call Trace: [ 61.009790] [ 61.010110] dump_stack_lvl+0x91/0xf0 [ 61.010655] print_report+0xcc/0x620 [ 61.011189] ? __virt_addr_valid+0x102/0x340 [ 61.011803] ? vma_interval_tree_remove+0xc75/0xec0 [ 61.012499] ? vma_interval_tree_remove+0xc75/0xec0 [ 61.013216] kasan_report+0xbe/0xf0 [ 61.013762] ? vma_interval_tree_remove+0xc75/0xec0 [ 61.014484] vma_interval_tree_remove+0xc75/0xec0 [ 61.015177] vma_prepare+0xc54/0x11a0 [ 61.015729] __split_vma+0x5af/0x950 [ 61.016273] ? __pfx___split_vma+0x10/0x10 [ 61.016899] ? find_held_lock+0x2c/0x110 [ 61.017504] do_vmi_align_munmap+0x2ba/0x11f0 [ 61.018156] ? lock_is_held_type+0x9f/0x120 [ 61.018773] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 61.019471] ? mtree_range_walk+0x632/0x900 [ 61.020112] ? mas_walk+0x5c7/0x7c0 [ 61.020663] do_vmi_munmap+0x1f1/0x2b0 [ 61.021242] mmap_region+0x1f9/0x2660 [ 61.021801] ? vm_mmap_pgoff+0x15c/0x3a0 [ 61.022392] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 61.023201] ? __pfx_lock_acquire+0x10/0x10 [ 61.023810] ? __pfx_mmap_region+0x10/0x10 [ 61.024415] ? security_mmap_addr+0x7d/0xa0 [ 61.025043] ? get_unmapped_area+0x1f5/0x3f0 [ 61.025672] do_mmap+0x854/0xf00 [ 61.026172] vm_mmap_pgoff+0x1a6/0x3a0 [ 61.026739] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 61.027382] ksys_mmap_pgoff+0x3af/0x500 [ 61.027965] do_syscall_64+0x3f/0x90 [ 61.028506] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 61.029258] RIP: 0033:0x7f5b076fbd82 [ 61.029787] 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 [ 61.031962] RSP: 002b:00007fffae650158 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 61.032874] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f5b076fbd82 [ 61.033726] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f5b06b35000 [ 61.034577] RBP: 00007f5b06b35000 R08: 0000000000000009 R09: 0000000000001000 [ 61.035417] R10: 0000000000000812 R11: 0000000000000206 R12: 000055a89c573ec0 [ 61.036272] R13: 00007fffae650170 R14: 00007fffae6501a0 R15: 00007fffae650500 [ 61.037146] [ 61.037436] [ 61.037656] Allocated by task 212: [ 61.038080] kasan_save_stack+0x22/0x50 [ 61.038584] kasan_set_track+0x25/0x30 [ 61.039079] __kasan_slab_alloc+0x59/0x70 [ 61.039598] kmem_cache_alloc+0x16b/0x370 [ 61.040111] vm_area_dup+0x20/0x160 [ 61.040637] __split_vma+0x170/0x950 [ 61.041181] split_vma+0xc6/0x110 [ 61.041692] mprotect_fixup+0x8d2/0xb30 [ 61.042275] do_mprotect_pkey+0x87e/0xd40 [ 61.042884] __x64_sys_mprotect+0x78/0xc0 [ 61.043486] do_syscall_64+0x3f/0x90 [ 61.044044] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 61.044808] [ 61.045062] Freed by task 212: [ 61.045514] kasan_save_stack+0x22/0x50 [ 61.046102] kasan_set_track+0x25/0x30 [ 61.046680] kasan_save_free_info+0x2b/0x50 [ 61.047296] __kasan_slab_free+0x10a/0x190 [ 61.047904] kmem_cache_free+0x10d/0x4d0 [ 61.048495] rcu_core+0x8c8/0x2860 [ 61.049016] __do_softirq+0x1b7/0x7d4 [ 61.049569] [ 61.049819] Last potentially related work creation: [ 61.050499] kasan_save_stack+0x22/0x50 [ 61.051086] __kasan_record_aux_stack+0x8e/0xa0 [ 61.051747] __call_rcu_common.constprop.0+0x6a/0xb90 [ 61.052490] remove_vma+0x139/0x170 [ 61.053028] do_vmi_align_munmap+0xd4a/0x11f0 [ 61.053677] do_vmi_munmap+0x1f1/0x2b0 [ 61.054234] __vm_munmap+0x138/0x3a0 [ 61.054775] __x64_sys_munmap+0x59/0x80 [ 61.055342] do_syscall_64+0x3f/0x90 [ 61.055890] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 61.056626] [ 61.056880] The buggy address belongs to the object at ffff888019f3c9f8 [ 61.056880] which belongs to the cache vm_area_struct of size 168 [ 61.058581] The buggy address is located 88 bytes inside of [ 61.058581] freed 168-byte region [ffff888019f3c9f8, ffff888019f3caa0) [ 61.060224] [ 61.060474] The buggy address belongs to the physical page: [ 61.061251] page:000000007a7b8095 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x19f3c [ 61.062506] memcg:ffff8880099adf01 [ 61.063008] flags: 0x100000000000200(slab|node=0|zone=1) [ 61.063753] page_type: 0xffffffff() [ 61.064272] raw: 0100000000000200 ffff8880087a0c80 dead000000000100 dead000000000122 [ 61.065360] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff8880099adf01 [ 61.066412] page dumped because: kasan: bad access detected [ 61.067181] [ 61.067429] Memory state around the buggy address: [ 61.068103] ffff888019f3c900: fc fc 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 61.069110] ffff888019f3c980: 00 00 00 00 00 00 00 fc fc fc fc fc fc fc fc fa [ 61.070099] >ffff888019f3ca00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 61.071092] ^ [ 61.071907] ffff888019f3ca80: fb fb fb fb fc fc fc fc fc fc fc fc 00 00 00 00 [ 61.072913] ffff888019f3cb00: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 61.073897] ================================================================== [ 61.075009] Disabling lock debugging due to kernel taint [ 63.236664] BUG: Bad rss-counter state mm:0000000016a01692 type:MM_FILEPAGES val:33 [ 63.237849] BUG: Bad rss-counter state mm:0000000016a01692 type:MM_ANONPAGES val:22 [ 63.787980] BUG: Bad rss-counter state mm:000000000c1c69e3 type:MM_FILEPAGES val:33 [ 63.789246] BUG: Bad rss-counter state mm:000000000c1c69e3 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:12701' (ECDSA) to the list of known hosts. 2023/06/21 06:47:49 fuzzer started 2023/06/21 06:47:49 dialing manager at localhost:36067 2023/06/21 06:47:49 checking machine... 2023/06/21 06:47:49 checking revisions... [ 64.429502] kmemleak: Automatic memory scanning thread ended 2023/06/21 06:47:50 testing simple program... [ 64.478575] cgroup: Unknown subsys name 'net' [ 64.531824] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 06:47:49 Registers: info registers vcpu 0 RAX=0000000080000101 RBX=0000000000000001 RCX=ffffffff813b935c RDX=ffff88800ff78000 RSI=0000000000000100 RDI=0000000000000006 RBP=00000000fffc6324 RSP=ffff88806ce09df8 R8 =0000000000000006 R9 =0000000000000001 R10=0000000000000004 R11=0000000000000001 R12=0000000000000004 R13=0000000000000000 R14=0000000000000040 R15=0000000000000004 RIP=ffffffff814c0261 RFL=00000006 [-----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 00007fdc91e50900 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=00007fdc91241420 CR3=000000000c4fe000 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=ffffffffffffffffffffffffffffffff XMM01=30306234386136303638616663356134 XMM02=38303062343861363036386166633561 XMM03=2f6c616e72756f6a2f676f6c2f6e7572 XMM04=047890cd59a4d70600000000000ae988 XMM05=69510c427820c5440000000000132778 XMM06=ec98337f9a6dd89a00000000001311a8 XMM07=00000000000000000000000000000000 XMM08=415453454d49545f454d49544c414552 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=dffffc0000000000 RBX=0000000000000001 RCX=ffffffff863b3d01 RDX=1ffff1100d9e135e RSI=ffffffff8450cc7f RDI=ffff88806cf09a98 RBP=ffff88806cf09af0 RSP=ffff88806cf09a28 R8 =ffffffff863b3d32 R9 =ffff88806cf09ad8 R10=0000000000038001 R11=000000000008aab1 R12=ffff88806cf09b60 R13=0000000000000000 R14=ffff88801602d1c0 R15=ffff88806cf09a98 RIP=ffffffff8113062c 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 00007f0366044900 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=00007ffee6a30000 CR3=000000000def8000 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