syzkaller login: [ 38.786967] BUG: Bad rss-counter state mm:00000000a289f81f type:MM_FILEPAGES val:33 [ 38.788105] BUG: Bad rss-counter state mm:00000000a289f81f type:MM_ANONPAGES val:22 [ 38.964216] ================================================================== [ 38.965119] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 38.966184] Read of size 8 at addr ffff88800dfea968 by task sshd/218 [ 38.966943] [ 38.967158] CPU: 0 PID: 218 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 38.968027] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 38.969007] Call Trace: [ 38.969325] [ 38.969611] dump_stack_lvl+0x91/0xf0 [ 38.970123] print_report+0xcc/0x620 [ 38.970604] ? __virt_addr_valid+0x102/0x340 [ 38.971152] ? vma_interval_tree_remove+0xc75/0xec0 [ 38.971762] ? vma_interval_tree_remove+0xc75/0xec0 [ 38.972428] kasan_report+0xbe/0xf0 [ 38.972918] ? vma_interval_tree_remove+0xc75/0xec0 [ 38.973541] vma_interval_tree_remove+0xc75/0xec0 [ 38.974154] vma_prepare+0xc54/0x11a0 [ 38.974642] __split_vma+0x5af/0x950 [ 38.975124] ? __pfx___split_vma+0x10/0x10 [ 38.975661] ? find_held_lock+0x2c/0x110 [ 38.976193] do_vmi_align_munmap+0x2ba/0x11f0 [ 38.976767] ? lock_is_held_type+0x9f/0x120 [ 38.977301] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 38.977901] ? mtree_range_walk+0x632/0x900 [ 38.978464] ? mas_walk+0x5c7/0x7c0 [ 38.978954] do_vmi_munmap+0x1f1/0x2b0 [ 38.979442] mmap_region+0x1f9/0x2660 [ 38.979923] ? vm_mmap_pgoff+0x15c/0x3a0 [ 38.980438] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 38.981152] ? __pfx_lock_acquire+0x10/0x10 [ 38.981681] ? __pfx_mmap_region+0x10/0x10 [ 38.982230] ? security_mmap_addr+0x7d/0xa0 [ 38.982764] ? get_unmapped_area+0x1f5/0x3f0 [ 38.983322] do_mmap+0x854/0xf00 [ 38.983772] vm_mmap_pgoff+0x1a6/0x3a0 [ 38.984275] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 38.984851] ksys_mmap_pgoff+0x3af/0x500 [ 38.985364] do_syscall_64+0x3f/0x90 [ 38.985844] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 38.986499] RIP: 0033:0x7f7680539d82 [ 38.986958] 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 [ 38.989089] RSP: 002b:00007ffcc98fe618 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 38.990015] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f7680539d82 [ 38.990861] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f767f973000 [ 38.991703] RBP: 00007f767f973000 R08: 0000000000000009 R09: 0000000000001000 [ 38.992542] R10: 0000000000000812 R11: 0000000000000206 R12: 000055af55862ec0 [ 38.993401] R13: 00007ffcc98fe630 R14: 00007ffcc98fe660 R15: 00007ffcc98fe9c0 [ 38.994275] [ 38.994569] [ 38.994783] Allocated by task 211: [ 38.995217] kasan_save_stack+0x22/0x50 [ 38.995722] kasan_set_track+0x25/0x30 [ 38.996215] __kasan_slab_alloc+0x59/0x70 [ 38.996737] kmem_cache_alloc+0x16b/0x370 [ 38.997250] vm_area_dup+0x20/0x160 [ 38.997702] __split_vma+0x170/0x950 [ 38.998173] split_vma+0xc6/0x110 [ 38.998618] mprotect_fixup+0x8d2/0xb30 [ 38.999119] do_mprotect_pkey+0x87e/0xd40 [ 38.999635] __x64_sys_mprotect+0x78/0xc0 [ 39.000161] do_syscall_64+0x3f/0x90 [ 39.000645] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 39.001285] [ 39.001500] Freed by task 211: [ 39.001894] kasan_save_stack+0x22/0x50 [ 39.002400] kasan_set_track+0x25/0x30 [ 39.002894] kasan_save_free_info+0x2b/0x50 [ 39.003425] __kasan_slab_free+0x10a/0x190 [ 39.003954] kmem_cache_free+0x10d/0x4d0 [ 39.004462] rcu_core+0x8c8/0x2860 [ 39.004903] __do_softirq+0x1b7/0x7d4 [ 39.005380] [ 39.005596] Last potentially related work creation: [ 39.006226] kasan_save_stack+0x22/0x50 [ 39.006764] __kasan_record_aux_stack+0x8e/0xa0 [ 39.007337] __call_rcu_common.constprop.0+0x6a/0xb90 [ 39.007978] remove_vma+0x139/0x170 [ 39.008435] do_vmi_align_munmap+0xd4a/0x11f0 [ 39.008997] do_vmi_munmap+0x1f1/0x2b0 [ 39.009479] __vm_munmap+0x138/0x3a0 [ 39.009950] __x64_sys_munmap+0x59/0x80 [ 39.010455] do_syscall_64+0x3f/0x90 [ 39.010926] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 39.011574] [ 39.011794] Second to last potentially related work creation: [ 39.012477] kasan_save_stack+0x22/0x50 [ 39.012976] __kasan_record_aux_stack+0x8e/0xa0 [ 39.013565] __call_rcu_common.constprop.0+0x6a/0xb90 [ 39.014244] remove_vma+0x139/0x170 [ 39.014694] do_vmi_align_munmap+0xd4a/0x11f0 [ 39.015257] do_vmi_munmap+0x1f1/0x2b0 [ 39.015741] mmap_region+0x1f9/0x2660 [ 39.016234] do_mmap+0x854/0xf00 [ 39.016668] vm_mmap_pgoff+0x1a6/0x3a0 [ 39.017163] ksys_mmap_pgoff+0x3af/0x500 [ 39.017664] do_syscall_64+0x3f/0x90 [ 39.018158] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 39.018800] [ 39.019016] The buggy address belongs to the object at ffff88800dfea910 [ 39.019016] which belongs to the cache vm_area_struct of size 168 [ 39.020484] The buggy address is located 88 bytes inside of [ 39.020484] freed 168-byte region [ffff88800dfea910, ffff88800dfea9b8) [ 39.021895] [ 39.022124] The buggy address belongs to the physical page: [ 39.022784] page:00000000540b2598 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xdfea [ 39.023866] memcg:ffff888009661301 [ 39.024298] flags: 0x100000000000200(slab|node=0|zone=1) [ 39.024948] page_type: 0xffffffff() [ 39.025403] raw: 0100000000000200 ffff8880087a0c80 ffffea00003fff00 dead000000000004 [ 39.026336] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff888009661301 [ 39.027265] page dumped because: kasan: bad access detected [ 39.027922] [ 39.028136] Memory state around the buggy address: [ 39.028715] ffff88800dfea800: fc fc fc fc fc 00 00 00 00 00 00 00 00 00 00 00 [ 39.029585] ffff88800dfea880: 00 00 00 00 00 00 00 00 00 00 fc fc fc fc fc fc [ 39.030451] >ffff88800dfea900: fc fc fa fb fb fb fb fb fb fb fb fb fb fb fb fb [ 39.031300] ^ [ 39.032093] ffff88800dfea980: fb fb fb fb fb fb fb fc fc fc fc fc fc fc fc 00 [ 39.032964] ffff88800dfeaa00: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 39.033808] ================================================================== [ 39.034796] Disabling lock debugging due to kernel taint [ 40.977168] BUG: Bad rss-counter state mm:00000000fd9ef4b5 type:MM_FILEPAGES val:33 [ 40.978204] BUG: Bad rss-counter state mm:00000000fd9ef4b5 type:MM_ANONPAGES val:22 [ 41.423926] BUG: Bad rss-counter state mm:00000000bcd2fddb type:MM_FILEPAGES val:33 [ 41.425073] BUG: Bad rss-counter state mm:00000000bcd2fddb type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:2275' (ECDSA) to the list of known hosts. 2023/06/20 12:33:32 fuzzer started 2023/06/20 12:33:32 dialing manager at localhost:36067 2023/06/20 12:33:32 checking machine... 2023/06/20 12:33:32 checking revisions... [ 42.141583] kmemleak: Automatic memory scanning thread ended 2023/06/20 12:33:32 testing simple program... [ 42.189650] cgroup: Unknown subsys name 'net' [ 42.239345] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 12:33:32 Registers: info registers vcpu 0 RAX=ffff88806ce35000 RBX=0000000000000000 RCX=ffffffff8451250e RDX=ffffed100d9c6a01 RSI=0000000000000004 RDI=ffffffff81288ac5 RBP=dffffc0000000000 RSP=ffffffff85407e10 R8 =0000000000000000 R9 =ffffed100d9c6a00 R10=ffff88806ce35003 R11=ffff888008c04000 R12=ffffffff85d3d350 R13=1ffffffff0a80fc7 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 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=00007f73d15d6700 CR3=000000001013e000 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=cd92df53cab3bc828c417915b681f066 XMM02=000000000011b418ec2efd57dc4c00df XMM03=0000000000121db8c3220b4818ca31df XMM04=73fa253241a34fc800000000000ae988 XMM05=69839b1756d863ae0000000000133a58 XMM06=bdf2e299e47b49d50000000000132b10 XMM07=e042d86d42eb936e0000000000122090 XMM08=c3220b4818ca31df000000000011b478 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=0000000000000078 RBX=ffff888015b1e000 RCX=ffff888015b1e000 RDX=00000000800d000c RSI=ffff888015b1e000 RDI=ffff88800844f780 RBP=ffff88800d9f7b58 RSP=ffff88800d9f7ac0 R8 =0000000000000001 R9 =ffffffff8181032f R10=ffffea000056c780 R11=00000000000d000c R12=ffffea000056c780 R13=ffff888015b1e980 R14=ffff88800844f780 R15=ffff88800844f780 RIP=ffffffff81809624 RFL=00000286 [--S--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 00007ff5f31c1900 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=00007ffd64100000 CR3=000000001a764000 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=ffffffffffffffffffff000000000000 XMM01=000000000000003635006b6f6c6c756e XMM02=62003d73646e756f7200323135616873 XMM03=5320444f4854454d5f54505952434e45 XMM04=40404040404040404040404040404040 XMM05=5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a XMM06=20202020202020202020202020202020 XMM07=00000000000000000000000000000000 XMM08=00000000000000000000000000202020 XMM09=ff0000ffffffffffff00000000ffffff XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000