syzkaller login: [ 28.795622] BUG: Bad rss-counter state mm:00000000f50961ed type:MM_FILEPAGES val:33 [ 28.797465] BUG: Bad rss-counter state mm:00000000f50961ed type:MM_ANONPAGES val:22 [ 28.974344] ================================================================== [ 28.975337] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 28.976351] Read of size 8 at addr ffff8880199574e0 by task sshd/220 [ 28.977193] [ 28.977429] CPU: 1 PID: 220 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 28.978391] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 28.979441] Call Trace: [ 28.979783] [ 28.980093] dump_stack_lvl+0x91/0xf0 [ 28.980624] print_report+0xcc/0x620 [ 28.981157] ? __virt_addr_valid+0x102/0x340 [ 28.981769] ? vma_interval_tree_remove+0xc75/0xec0 [ 28.982456] ? vma_interval_tree_remove+0xc75/0xec0 [ 28.983131] kasan_report+0xbe/0xf0 [ 28.983658] ? vma_interval_tree_remove+0xc75/0xec0 [ 28.984338] vma_interval_tree_remove+0xc75/0xec0 [ 28.984996] vma_prepare+0xc54/0x11a0 [ 28.985522] __split_vma+0x5af/0x950 [ 28.986029] ? __pfx___split_vma+0x10/0x10 [ 28.986584] ? find_held_lock+0x2c/0x110 [ 28.987162] do_vmi_align_munmap+0x2ba/0x11f0 [ 28.987787] ? lock_is_held_type+0x9f/0x120 [ 28.988375] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 28.989041] ? mtree_range_walk+0x632/0x900 [ 28.989653] ? mas_walk+0x5c7/0x7c0 [ 28.990178] do_vmi_munmap+0x1f1/0x2b0 [ 28.990721] mmap_region+0x1f9/0x2660 [ 28.991251] ? vm_mmap_pgoff+0x15c/0x3a0 [ 28.991829] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 28.992642] ? __pfx_lock_acquire+0x10/0x10 [ 28.993250] ? __pfx_mmap_region+0x10/0x10 [ 28.993863] ? security_mmap_addr+0x7d/0xa0 [ 28.994464] ? get_unmapped_area+0x1f5/0x3f0 [ 28.995089] do_mmap+0x854/0xf00 [ 28.995589] vm_mmap_pgoff+0x1a6/0x3a0 [ 28.996089] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 28.996686] ksys_mmap_pgoff+0x3af/0x500 [ 28.997264] do_syscall_64+0x3f/0x90 [ 28.997829] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 28.998566] RIP: 0033:0x7f49d7842d82 [ 28.999091] 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 [ 29.001527] RSP: 002b:00007ffea56c2158 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 29.002577] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f49d7842d82 [ 29.003549] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f49d6c7c000 [ 29.004520] RBP: 00007f49d6c7c000 R08: 0000000000000009 R09: 0000000000001000 [ 29.005490] R10: 0000000000000812 R11: 0000000000000206 R12: 000055efe9a6dec0 [ 29.006477] R13: 00007ffea56c2170 R14: 00007ffea56c21a0 R15: 00007ffea56c2500 [ 29.007552] [ 29.007887] [ 29.008132] Allocated by task 213: [ 29.008622] kasan_save_stack+0x22/0x50 [ 29.009199] kasan_set_track+0x25/0x30 [ 29.009778] __kasan_slab_alloc+0x59/0x70 [ 29.010379] kmem_cache_alloc+0x16b/0x370 [ 29.010962] vm_area_dup+0x20/0x160 [ 29.011485] __split_vma+0x170/0x950 [ 29.012018] split_vma+0xc6/0x110 [ 29.012513] mprotect_fixup+0x8d2/0xb30 [ 29.013088] do_mprotect_pkey+0x87e/0xd40 [ 29.013704] __x64_sys_mprotect+0x78/0xc0 [ 29.014305] do_syscall_64+0x3f/0x90 [ 29.014854] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 29.015597] [ 29.015810] Freed by task 213: [ 29.016199] kasan_save_stack+0x22/0x50 [ 29.016730] kasan_set_track+0x25/0x30 [ 29.017292] kasan_save_free_info+0x2b/0x50 [ 29.017921] __kasan_slab_free+0x10a/0x190 [ 29.018530] kmem_cache_free+0x10d/0x4d0 [ 29.019113] rcu_core+0x8c8/0x2860 [ 29.019623] __do_softirq+0x1b7/0x7d4 [ 29.020108] [ 29.020320] Last potentially related work creation: [ 29.020965] kasan_save_stack+0x22/0x50 [ 29.021545] __kasan_record_aux_stack+0x8e/0xa0 [ 29.022218] __call_rcu_common.constprop.0+0x6a/0xb90 [ 29.022959] remove_vma+0x139/0x170 [ 29.023480] do_vmi_align_munmap+0xd4a/0x11f0 [ 29.024071] do_vmi_munmap+0x1f1/0x2b0 [ 29.024552] __vm_munmap+0x138/0x3a0 [ 29.025023] __x64_sys_munmap+0x59/0x80 [ 29.025521] do_syscall_64+0x3f/0x90 [ 29.026007] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 29.026655] [ 29.026870] The buggy address belongs to the object at ffff888019957488 [ 29.026870] which belongs to the cache vm_area_struct of size 168 [ 29.028354] The buggy address is located 88 bytes inside of [ 29.028354] freed 168-byte region [ffff888019957488, ffff888019957530) [ 29.029780] [ 29.029998] The buggy address belongs to the physical page: [ 29.030661] page:00000000b46d8264 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x19957 [ 29.031762] memcg:ffff8880165b4d01 [ 29.032191] flags: 0x100000000000200(slab|node=0|zone=1) [ 29.032852] page_type: 0xffffffff() [ 29.033303] raw: 0100000000000200 ffff8880087a0c80 dead000000000122 0000000000000000 [ 29.034231] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff8880165b4d01 [ 29.035138] page dumped because: kasan: bad access detected [ 29.035812] [ 29.036033] Memory state around the buggy address: [ 29.036625] ffff888019957380: fc fc fc fc 00 00 00 00 00 00 00 00 00 00 00 00 [ 29.037496] ffff888019957400: 00 00 00 00 00 00 00 00 00 fc fc fc fc fc fc fc [ 29.038383] >ffff888019957480: fc fa fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 29.039245] ^ [ 29.040022] ffff888019957500: fb fb fb fb fb fb fc fc fc fc fc fc fc fc fa fb [ 29.040894] ffff888019957580: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 29.041768] ================================================================== [ 29.042724] Disabling lock debugging due to kernel taint [ 31.268556] BUG: Bad rss-counter state mm:0000000016414569 type:MM_FILEPAGES val:33 [ 31.269900] BUG: Bad rss-counter state mm:0000000016414569 type:MM_ANONPAGES val:22 [ 31.723543] BUG: Bad rss-counter state mm:000000003ebc282a type:MM_FILEPAGES val:33 [ 31.724833] BUG: Bad rss-counter state mm:000000003ebc282a type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:45974' (ECDSA) to the list of known hosts. 2023/06/20 17:37:14 fuzzer started 2023/06/20 17:37:14 dialing manager at localhost:36067 2023/06/20 17:37:14 checking machine... 2023/06/20 17:37:14 checking revisions... [ 32.401375] kmemleak: Automatic memory scanning thread ended 2023/06/20 17:37:15 testing simple program... [ 32.441114] cgroup: Unknown subsys name 'net' [ 32.497904] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 17:37:14 Registers: info registers vcpu 0 RAX=dffffc0000000000 RBX=0000000000000001 RCX=ffffffff8614c0e0 RDX=1ffff1100333ef4f RSI=0000000000000001 RDI=0000000000000001 RBP=ffff8880199f7a88 RSP=ffff8880199f79c0 R8 =ffffffff8614c0e4 R9 =ffff8880199f7a70 R10=0000000000038001 R11=00000000000240a4 R12=ffff8880199f7a90 R13=ffff8880199f7a78 R14=0000000000000005 R15=ffff8880199f7a30 RIP=ffffffff81130b54 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 00007f9fbc7a0900 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=00007f9fbcd57618 CR3=000000000ef38000 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=6e69676f6c5f6d61702c78756e696c65 XMM02=755f6d61702c74696d7265705f6d6170 XMM03=2c766e655f6d61702c7374696d696c5f XMM04=6d61702c766e655f6d61702c7374696d XMM05=78696e755f6d61702c74696d7265705f XMM06=6469756e69676f6c5f6d61702c78756e XMM07=672065736f6c635f6e6f69737365733a XMM08=61662029286e65706f5f746964756100 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=ffff888008c04400 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=00007fc4fb411000 CR3=000000000d89c000 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=351dc58913dc95b325400fab96908006 XMM02=ec2efd57dc4c00df000000000011aea0 XMM03=89f2143ece228b23000000000011af70 XMM04=92ea73d5738aa64c00000000000ae988 XMM05=e4cb8bb95a7664b600000000001319e0 XMM06=c291bd5c70af25b90000000000131868 XMM07=e042d86d42eb936e0000000000121748 XMM08=89f2143ece228b23000000000011af70 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000