syzkaller login: [ 60.491153] BUG: Bad rss-counter state mm:0000000038b64ace type:MM_FILEPAGES val:33 [ 60.491806] BUG: Bad rss-counter state mm:0000000038b64ace type:MM_ANONPAGES val:22 [ 60.605901] ================================================================== [ 60.606530] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 60.607184] Read of size 8 at addr ffff88801a13ba50 by task sshd/221 [ 60.607718] [ 60.607873] CPU: 0 PID: 221 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 60.608468] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 60.609139] Call Trace: [ 60.609358] [ 60.609555] dump_stack_lvl+0x91/0xf0 [ 60.609918] print_report+0xcc/0x620 [ 60.610246] ? __virt_addr_valid+0x102/0x340 [ 60.610684] ? vma_interval_tree_remove+0xc75/0xec0 [ 60.611108] ? vma_interval_tree_remove+0xc75/0xec0 [ 60.611526] kasan_report+0xbe/0xf0 [ 60.611857] ? vma_interval_tree_remove+0xc75/0xec0 [ 60.612276] vma_interval_tree_remove+0xc75/0xec0 [ 60.612703] vma_prepare+0xc54/0x11a0 [ 60.613031] __split_vma+0x5af/0x950 [ 60.613354] ? __pfx___split_vma+0x10/0x10 [ 60.613729] ? find_held_lock+0x2c/0x110 [ 60.614085] do_vmi_align_munmap+0x2ba/0x11f0 [ 60.614466] ? lock_is_held_type+0x9f/0x120 [ 60.614844] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 60.615261] ? mtree_range_walk+0x632/0x900 [ 60.615636] ? mas_walk+0x5c7/0x7c0 [ 60.615959] do_vmi_munmap+0x1f1/0x2b0 [ 60.616291] mmap_region+0x1f9/0x2660 [ 60.616626] ? vm_mmap_pgoff+0x15c/0x3a0 [ 60.616983] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 60.617468] ? __pfx_lock_acquire+0x10/0x10 [ 60.617859] ? __pfx_mmap_region+0x10/0x10 [ 60.618228] ? security_mmap_addr+0x7d/0xa0 [ 60.618592] ? get_unmapped_area+0x1f5/0x3f0 [ 60.618971] do_mmap+0x854/0xf00 [ 60.619276] vm_mmap_pgoff+0x1a6/0x3a0 [ 60.619611] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 60.619992] ksys_mmap_pgoff+0x3af/0x500 [ 60.620341] do_syscall_64+0x3f/0x90 [ 60.620677] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 60.621136] RIP: 0033:0x7efc54bbcd82 [ 60.621456] 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 [ 60.622952] RSP: 002b:00007ffef8e98628 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 60.623581] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007efc54bbcd82 [ 60.624181] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007efc53ff6000 [ 60.624763] RBP: 00007efc53ff6000 R08: 0000000000000009 R09: 0000000000001000 [ 60.625339] R10: 0000000000000812 R11: 0000000000000206 R12: 0000563fb4069ec0 [ 60.625937] R13: 00007ffef8e98640 R14: 00007ffef8e98670 R15: 00007ffef8e989d0 [ 60.626528] [ 60.626726] [ 60.626877] Allocated by task 214: [ 60.627176] kasan_save_stack+0x22/0x50 [ 60.627531] kasan_set_track+0x25/0x30 [ 60.627868] __kasan_slab_alloc+0x59/0x70 [ 60.628225] kmem_cache_alloc+0x16b/0x370 [ 60.628578] vm_area_dup+0x20/0x160 [ 60.628896] __split_vma+0x170/0x950 [ 60.629214] split_vma+0xc6/0x110 [ 60.629519] mprotect_fixup+0x8d2/0xb30 [ 60.629882] do_mprotect_pkey+0x87e/0xd40 [ 60.630236] __x64_sys_mprotect+0x78/0xc0 [ 60.630588] do_syscall_64+0x3f/0x90 [ 60.630919] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 60.631360] [ 60.631508] Freed by task 19: [ 60.631774] kasan_save_stack+0x22/0x50 [ 60.632113] kasan_set_track+0x25/0x30 [ 60.632446] kasan_save_free_info+0x2b/0x50 [ 60.632817] __kasan_slab_free+0x10a/0x190 [ 60.633197] kmem_cache_free+0x10d/0x4d0 [ 60.633547] rcu_core+0x8c8/0x2860 [ 60.633861] __do_softirq+0x1b7/0x7d4 [ 60.634188] [ 60.634335] Last potentially related work creation: [ 60.634742] kasan_save_stack+0x22/0x50 [ 60.635086] __kasan_record_aux_stack+0x8e/0xa0 [ 60.635482] __call_rcu_common.constprop.0+0x6a/0xb90 [ 60.635934] remove_vma+0x139/0x170 [ 60.636239] do_vmi_align_munmap+0xd4a/0x11f0 [ 60.636619] do_vmi_munmap+0x1f1/0x2b0 [ 60.636958] __vm_munmap+0x138/0x3a0 [ 60.637276] __x64_sys_munmap+0x59/0x80 [ 60.637629] do_syscall_64+0x3f/0x90 [ 60.637961] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 60.638398] [ 60.638544] The buggy address belongs to the object at ffff88801a13b9f8 [ 60.638544] which belongs to the cache vm_area_struct of size 168 [ 60.639557] The buggy address is located 88 bytes inside of [ 60.639557] freed 168-byte region [ffff88801a13b9f8, ffff88801a13baa0) [ 60.640532] [ 60.640677] The buggy address belongs to the physical page: [ 60.641138] page:00000000f31928f9 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x1a13b [ 60.641895] memcg:ffff88800fe41001 [ 60.642193] flags: 0x100000000000200(slab|node=0|zone=1) [ 60.642645] page_type: 0xffffffff() [ 60.642960] raw: 0100000000000200 ffff8880087a0c80 dead000000000122 0000000000000000 [ 60.643791] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800fe41001 [ 60.644452] page dumped because: kasan: bad access detected [ 60.644944] [ 60.645104] Memory state around the buggy address: [ 60.645514] ffff88801a13b900: fc fc 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 60.646168] ffff88801a13b980: 00 00 00 00 00 00 00 fc fc fc fc fc fc fc fc fa [ 60.646812] >ffff88801a13ba00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 60.647420] ^ [ 60.647927] ffff88801a13ba80: fb fb fb fb fc fc fc fc fc fc fc fc fa fb fb fb [ 60.648555] ffff88801a13bb00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 60.649178] ================================================================== [ 60.650165] Disabling lock debugging due to kernel taint [ 62.037731] BUG: Bad rss-counter state mm:000000008796b44d type:MM_FILEPAGES val:33 [ 62.038471] BUG: Bad rss-counter state mm:000000008796b44d type:MM_ANONPAGES val:22 [ 62.407277] BUG: Bad rss-counter state mm:0000000079cfcab5 type:MM_FILEPAGES val:33 [ 62.408006] BUG: Bad rss-counter state mm:0000000079cfcab5 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:46826' (ECDSA) to the list of known hosts. 2023/06/21 09:39:54 fuzzer started 2023/06/21 09:39:54 dialing manager at localhost:36067 2023/06/21 09:39:54 checking machine... 2023/06/21 09:39:54 checking revisions... [ 62.944166] kmemleak: Automatic memory scanning thread ended 2023/06/21 09:39:54 testing simple program... [ 62.981151] cgroup: Unknown subsys name 'net' [ 63.015524] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 09:39:54 Registers: info registers vcpu 0 RAX=0000607f92e14868 RBX=0000000000000001 RCX=ffffffff815343f6 RDX=1ffff11001d9812a RSI=000000000000002d RDI=ffff88800ecc0950 RBP=ffff88800ecc0000 RSP=ffff8880190179f8 R8 =0000000000000000 R9 =fffffbfff0ba7a6a R10=ffffffff85d3d357 R11=0000000000000000 R12=0000000000000001 R13=ffff88800f1bdd00 R14=0000000000000dc0 R15=ffff88800ecc0000 RIP=ffffffff8182daba 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 00007fc7bf8a2900 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=00007ffc9eda5000 CR3=000000000d430000 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=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=00007f0cfe5941d0 CR3=000000000d796000 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=2475f370afea078b584e14d53470c4be XMM02=000000000011a960eff9b2d0a8fce9cb XMM03=000000000011aa302c67c8bc2e329bc3 XMM04=e625f9830bd810e000000000000ae988 XMM05=423795c9b201f00d0000000000132870 XMM06=c291bd5c70af25b90000000000132268 XMM07=e042d86d42eb936e0000000000122a68 XMM08=b4c282a5b04ce596000000000011aa30 XMM09=00000000000000000000000000000000 XMM10=20200000000020202020202020200000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000