syzkaller login: [ 28.793089] BUG: Bad rss-counter state mm:00000000d43303c8 type:MM_FILEPAGES val:33 [ 28.794283] BUG: Bad rss-counter state mm:00000000d43303c8 type:MM_ANONPAGES val:22 [ 28.937665] ================================================================== [ 28.938579] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 28.939537] Read of size 8 at addr ffff88800ede3140 by task sshd/221 [ 28.940317] [ 28.940727] CPU: 1 PID: 221 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 28.941601] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 28.942569] Call Trace: [ 28.943004] [ 28.943348] dump_stack_lvl+0x91/0xf0 [ 28.943926] print_report+0xcc/0x620 [ 28.944518] ? __virt_addr_valid+0x102/0x340 [ 28.945173] ? vma_interval_tree_remove+0xc75/0xec0 [ 28.945900] ? vma_interval_tree_remove+0xc75/0xec0 [ 28.946632] kasan_report+0xbe/0xf0 [ 28.947191] ? vma_interval_tree_remove+0xc75/0xec0 [ 28.947930] vma_interval_tree_remove+0xc75/0xec0 [ 28.948612] vma_prepare+0xc54/0x11a0 [ 28.949094] __split_vma+0x5af/0x950 [ 28.949564] ? __pfx___split_vma+0x10/0x10 [ 28.950097] ? find_held_lock+0x2c/0x110 [ 28.950620] do_vmi_align_munmap+0x2ba/0x11f0 [ 28.951190] ? lock_is_held_type+0x9f/0x120 [ 28.951734] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 28.952363] ? mtree_range_walk+0x632/0x900 [ 28.952917] ? mas_walk+0x5c7/0x7c0 [ 28.953398] do_vmi_munmap+0x1f1/0x2b0 [ 28.953889] mmap_region+0x1f9/0x2660 [ 28.954373] ? vm_mmap_pgoff+0x15c/0x3a0 [ 28.954889] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 28.955603] ? __pfx_lock_acquire+0x10/0x10 [ 28.956147] ? __pfx_mmap_region+0x10/0x10 [ 28.956675] ? security_mmap_addr+0x7d/0xa0 [ 28.957204] ? get_unmapped_area+0x1f5/0x3f0 [ 28.957753] do_mmap+0x854/0xf00 [ 28.958193] vm_mmap_pgoff+0x1a6/0x3a0 [ 28.958694] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 28.959249] ksys_mmap_pgoff+0x3af/0x500 [ 28.959756] do_syscall_64+0x3f/0x90 [ 28.960256] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 28.960904] RIP: 0033:0x7fd776c3ad82 [ 28.961366] 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 [ 28.963509] RSP: 002b:00007ffec4740638 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 28.964422] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007fd776c3ad82 [ 28.965273] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007fd776074000 [ 28.966118] RBP: 00007fd776074000 R08: 0000000000000009 R09: 0000000000001000 [ 28.966973] R10: 0000000000000812 R11: 0000000000000206 R12: 000055f14b214f70 [ 28.967827] R13: 00007ffec4740650 R14: 00007ffec4740680 R15: 00007ffec47409e0 [ 28.968712] [ 28.969007] [ 28.969224] Allocated by task 213: [ 28.969651] kasan_save_stack+0x22/0x50 [ 28.970154] kasan_set_track+0x25/0x30 [ 28.970657] __kasan_slab_alloc+0x59/0x70 [ 28.971192] kmem_cache_alloc+0x16b/0x370 [ 28.971717] vm_area_dup+0x20/0x160 [ 28.972214] __split_vma+0x170/0x950 [ 28.972693] split_vma+0xc6/0x110 [ 28.973157] mprotect_fixup+0x8d2/0xb30 [ 28.973685] do_mprotect_pkey+0x87e/0xd40 [ 28.974211] __x64_sys_mprotect+0x78/0xc0 [ 28.974748] do_syscall_64+0x3f/0x90 [ 28.975226] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 28.975884] [ 28.976107] Freed by task 210: [ 28.976511] kasan_save_stack+0x22/0x50 [ 28.977022] kasan_set_track+0x25/0x30 [ 28.977525] kasan_save_free_info+0x2b/0x50 [ 28.978068] __kasan_slab_free+0x10a/0x190 [ 28.978616] kmem_cache_free+0x10d/0x4d0 [ 28.979125] rcu_core+0x8c8/0x2860 [ 28.979579] __do_softirq+0x1b7/0x7d4 [ 28.980082] [ 28.980304] Last potentially related work creation: [ 28.980891] kasan_save_stack+0x22/0x50 [ 28.981404] __kasan_record_aux_stack+0x8e/0xa0 [ 28.981983] __call_rcu_common.constprop.0+0x6a/0xb90 [ 28.982623] remove_vma+0x139/0x170 [ 28.983077] do_vmi_align_munmap+0xd4a/0x11f0 [ 28.983648] do_vmi_munmap+0x1f1/0x2b0 [ 28.984154] __vm_munmap+0x138/0x3a0 [ 28.984621] __x64_sys_munmap+0x59/0x80 [ 28.985116] do_syscall_64+0x3f/0x90 [ 28.985594] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 28.986234] [ 28.986450] The buggy address belongs to the object at ffff88800ede30e8 [ 28.986450] which belongs to the cache vm_area_struct of size 168 [ 28.987917] The buggy address is located 88 bytes inside of [ 28.987917] freed 168-byte region [ffff88800ede30e8, ffff88800ede3190) [ 28.989326] [ 28.989543] The buggy address belongs to the physical page: [ 28.990205] page:000000003d22f06f refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xede3 [ 28.991284] memcg:ffff88800fda7801 [ 28.991721] flags: 0x100000000000200(slab|node=0|zone=1) [ 28.992385] page_type: 0xffffffff() [ 28.992836] raw: 0100000000000200 ffff8880087a0c80 dead000000000122 0000000000000000 [ 28.993778] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800fda7801 [ 28.994685] page dumped because: kasan: bad access detected [ 28.995357] [ 28.995572] Memory state around the buggy address: [ 28.996169] ffff88800ede3000: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 28.997035] ffff88800ede3080: 00 00 00 00 00 fc fc fc fc fc fc fc fc fa fb fb [ 28.997901] >ffff88800ede3100: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 28.998757] ^ [ 28.999408] ffff88800ede3180: fb fb fc fc fc fc fc fc fc fc fa fb fb fb fb fb [ 29.000275] ffff88800ede3200: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fc [ 29.001137] ================================================================== [ 29.002510] Disabling lock debugging due to kernel taint [ 31.013970] BUG: Bad rss-counter state mm:00000000b489109d type:MM_FILEPAGES val:33 [ 31.015150] BUG: Bad rss-counter state mm:00000000b489109d type:MM_ANONPAGES val:22 [ 31.419766] BUG: Bad rss-counter state mm:00000000c5d0026e type:MM_FILEPAGES val:33 [ 31.421047] BUG: Bad rss-counter state mm:00000000c5d0026e type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:4996' (ECDSA) to the list of known hosts. 2023/06/20 11:47:09 fuzzer started 2023/06/20 11:47:09 dialing manager at localhost:36067 2023/06/20 11:47:09 checking machine... 2023/06/20 11:47:09 checking revisions... [ 32.059831] kmemleak: Automatic memory scanning thread ended 2023/06/20 11:47:09 testing simple program... [ 32.100355] cgroup: Unknown subsys name 'net' [ 32.132691] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 11:47:09 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=00007f2b8753bce0 CR3=0000000009a82000 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=4efc17794ac0e9b21b48a900e446e647 XMM02=ec2efd57dc4c00df000000000011d3b8 XMM03=64c52c91d2e60860000000000011d488 XMM04=17f051969d924a8e00000000000ae988 XMM05=e4cb8bb95a7664b60000000000131998 XMM06=0a0e4ef6829f34970000000000130800 XMM07=e042d86d42eb936e0000000000121e48 XMM08=64c52c91d2e60860000000000011d488 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=dffffc0000000000 RBX=ffff88800ef9b680 RCX=0000000000000000 RDX=0000000000000000 RSI=ffffffff814c857a RDI=ffff88800ef9ba74 RBP=ffff88800ef9b680 RSP=ffff888019a1f508 R8 =0000000000000005 R9 =0000000000000000 R10=0000000000000000 R11=00000000000b6a61 R12=ffff88800ef9b680 R13=0000000000000000 R14=ffffffff85652d08 R15=0000000080110000 RIP=ffffffff8137459d RFL=00000217 [----APC] 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 00007f7137a1c900 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=00007ffe6c7a3000 CR3=000000000c6c0000 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