[ 59.871153] BUG: Bad rss-counter state mm:00000000370c6206 type:MM_FILEPAGES val:33 [ 59.872614] BUG: Bad rss-counter state mm:00000000370c6206 type:MM_ANONPAGES val:22 [ 60.029691] ================================================================== [ 60.030682] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 60.031697] Read of size 8 at addr ffff88800fc50b38 by task sshd/219 [ 60.032664] [ 60.032917] CPU: 1 PID: 219 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 60.033861] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 60.034937] Call Trace: [ 60.035281] [ 60.035585] dump_stack_lvl+0x91/0xf0 [ 60.036122] print_report+0xcc/0x620 [ 60.036652] ? __virt_addr_valid+0x102/0x340 [ 60.037250] ? vma_interval_tree_remove+0xc75/0xec0 [ 60.037936] ? vma_interval_tree_remove+0xc75/0xec0 [ 60.038608] kasan_report+0xbe/0xf0 [ 60.039115] ? vma_interval_tree_remove+0xc75/0xec0 [ 60.039779] vma_interval_tree_remove+0xc75/0xec0 [ 60.040429] vma_prepare+0xc54/0x11a0 [ 60.040945] __split_vma+0x5af/0x950 [ 60.041463] ? __pfx___split_vma+0x10/0x10 [ 60.042030] ? find_held_lock+0x2c/0x110 [ 60.042587] do_vmi_align_munmap+0x2ba/0x11f0 [ 60.043201] ? lock_is_held_type+0x9f/0x120 [ 60.043782] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 60.044438] ? mtree_range_walk+0x632/0x900 [ 60.045039] ? mas_walk+0x5c7/0x7c0 [ 60.045562] do_vmi_munmap+0x1f1/0x2b0 [ 60.046099] mmap_region+0x1f9/0x2660 [ 60.046618] ? vm_mmap_pgoff+0x15c/0x3a0 [ 60.047173] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 60.047940] ? __pfx_lock_acquire+0x10/0x10 [ 60.048517] ? __pfx_mmap_region+0x10/0x10 [ 60.049086] ? security_mmap_addr+0x7d/0xa0 [ 60.049675] ? get_unmapped_area+0x1f5/0x3f0 [ 60.050274] do_mmap+0x854/0xf00 [ 60.050747] vm_mmap_pgoff+0x1a6/0x3a0 [ 60.051282] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 60.051882] ksys_mmap_pgoff+0x3af/0x500 [ 60.052427] do_syscall_64+0x3f/0x90 [ 60.052942] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 60.053651] RIP: 0033:0x7f78c09c6d82 [ 60.054144] 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 [ 60.056458] RSP: 002b:00007ffe44884a88 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 60.057470] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f78c09c6d82 [ 60.058412] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f78bfe00000 [ 60.059356] RBP: 00007f78bfe00000 R08: 0000000000000009 R09: 0000000000001000 [ 60.060282] R10: 0000000000000812 R11: 0000000000000206 R12: 000055e16aa28ec0 [ 60.061197] R13: 00007ffe44884aa0 R14: 00007ffe44884ad0 R15: 00007ffe44884e30 [ 60.062129] [ 60.062438] [ 60.062672] Allocated by task 212: [ 60.063133] kasan_save_stack+0x22/0x50 [ 60.063671] kasan_set_track+0x25/0x30 [ 60.064208] __kasan_slab_alloc+0x59/0x70 [ 60.064770] kmem_cache_alloc+0x16b/0x370 [ 60.065348] vm_area_dup+0x20/0x160 [ 60.065843] __split_vma+0x170/0x950 [ 60.066360] split_vma+0xc6/0x110 [ 60.066842] mprotect_fixup+0x8d2/0xb30 [ 60.067400] do_mprotect_pkey+0x87e/0xd40 [ 60.067984] __x64_sys_mprotect+0x78/0xc0 [ 60.068562] do_syscall_64+0x3f/0x90 [ 60.069092] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 60.069823] [ 60.070065] Freed by task 212: [ 60.070497] kasan_save_stack+0x22/0x50 [ 60.071051] kasan_set_track+0x25/0x30 [ 60.071597] kasan_save_free_info+0x2b/0x50 [ 60.072194] __kasan_slab_free+0x10a/0x190 [ 60.072781] kmem_cache_free+0x10d/0x4d0 [ 60.073408] rcu_core+0x8c8/0x2860 [ 60.073900] __do_softirq+0x1b7/0x7d4 [ 60.074429] [ 60.074665] Last potentially related work creation: [ 60.075319] kasan_save_stack+0x22/0x50 [ 60.075879] __kasan_record_aux_stack+0x8e/0xa0 [ 60.076512] __call_rcu_common.constprop.0+0x6a/0xb90 [ 60.077225] remove_vma+0x139/0x170 [ 60.077743] do_vmi_align_munmap+0xd4a/0x11f0 [ 60.078355] do_vmi_munmap+0x1f1/0x2b0 [ 60.078891] __vm_munmap+0x138/0x3a0 [ 60.079412] __x64_sys_munmap+0x59/0x80 [ 60.079961] do_syscall_64+0x3f/0x90 [ 60.080483] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 60.081195] [ 60.081443] The buggy address belongs to the object at ffff88800fc50ae0 [ 60.081443] which belongs to the cache vm_area_struct of size 168 [ 60.083077] The buggy address is located 88 bytes inside of [ 60.083077] freed 168-byte region [ffff88800fc50ae0, ffff88800fc50b88) [ 60.084635] [ 60.084873] The buggy address belongs to the physical page: [ 60.085612] page:00000000a6dab524 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xfc50 [ 60.086818] memcg:ffff88800eb81f01 [ 60.087289] flags: 0x100000000000200(slab|node=0|zone=1) [ 60.088003] page_type: 0xffffffff() [ 60.088499] raw: 0100000000000200 ffff8880087a0c80 dead000000000122 0000000000000000 [ 60.089537] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800eb81f01 [ 60.090549] page dumped because: kasan: bad access detected [ 60.091283] [ 60.091519] Memory state around the buggy address: [ 60.092164] ffff88800fc50a00: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 60.093118] ffff88800fc50a80: 00 00 00 00 fc fc fc fc fc fc fc fc fa fb fb fb [ 60.094083] >ffff88800fc50b00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 60.095030] ^ [ 60.095709] ffff88800fc50b80: fb fc fc fc fc fc fc fc fc fa fb fb fb fb fb fb [ 60.096656] ffff88800fc50c00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fc fc [ 60.097604] ================================================================== [ 60.098614] Disabling lock debugging due to kernel taint Debian GNU/Linux 11 syzkaller ttyS0 syzkaller login: [ 61.965520] BUG: Bad rss-counter state mm:00000000045a3fd7 type:MM_FILEPAGES val:33 [ 61.966280] BUG: Bad rss-counter state mm:00000000045a3fd7 type:MM_ANONPAGES val:22 [ 62.357696] BUG: Bad rss-counter state mm:00000000908732bc type:MM_FILEPAGES val:33 [ 62.358462] BUG: Bad rss-counter state mm:00000000908732bc type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:43242' (ECDSA) to the list of known hosts. 2023/06/20 10:56:45 fuzzer started 2023/06/20 10:56:46 dialing manager at localhost:36067 2023/06/20 10:56:46 checking machine... 2023/06/20 10:56:46 checking revisions... [ 63.128918] kmemleak: Automatic memory scanning thread ended 2023/06/20 10:56:46 testing simple program... [ 63.180533] cgroup: Unknown subsys name 'net' [ 63.235469] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 10:56:45 Registers: info registers vcpu 0 RAX=0000000000000000 RBX=ffffffff85fa53ac RCX=ffffffff8363e063 RDX=0000000000000000 RSI=ffffffff863b3bde RDI=ffffffff85fa53a8 RBP=ffffffff85fa53a8 RSP=ffff888019f77798 R8 =ffffffff863b3bde R9 =ffff888019f77890 R10=0000000000038001 R11=000000000008aa79 R12=ffffffff85fa53a8 R13=ffffffff85fa53a8 R14=ffffffff85fa53a8 R15=dffffc0000000000 RIP=ffffffff8112fc6b 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 00007f3127f2e900 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=00007ffcb5db0000 CR3=000000000dede000 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=ffff8880102f0001 RBX=ffff8880102eff58 RCX=0000000000000001 RDX=ffff8880102eff60 RSI=ffff8880102eff48 RDI=ffff8880102ef858 RBP=ffff8880102e8000 RSP=ffff8880102ef7d8 R8 =0000000000000001 R9 =ffff8880102ef888 R10=0000000000038001 R11=00000000000b5080 R12=ffff8880102ef8a8 R13=ffff8880102ef890 R14=ffff8880102eff48 R15=ffff8880102ef848 RIP=ffffffff8113128d RFL=00000287 [--S--PC] 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=00007f1a64e24514 CR3=0000000005482000 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=00000000000100000000000100000000 XMM02=00007f1a651bd00000007f1a651be8c0 XMM03=00007f1a659fc51000007f1a64db6000 XMM04=00007f1a659fc51000007f1a64db6000 XMM05=00007f1a651bd00000007f1a651be8c0 XMM06=00007f1a651be2f000007f1a65323950 XMM07=00007f1a651bdcf000007f1a651bd760 XMM08=00007f1a651bd00000007f1a65323950 XMM09=00000000000000000000ff00ff000000 XMM10=00000000000000000000200000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000