syzkaller login: [ 56.141856] BUG: Bad rss-counter state mm:000000004553ca83 type:MM_FILEPAGES val:33 [ 56.143253] BUG: Bad rss-counter state mm:000000004553ca83 type:MM_ANONPAGES val:22 [ 56.250030] ================================================================== [ 56.250627] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 56.251228] Read of size 8 at addr ffff88800cb10968 by task sshd/220 [ 56.251740] [ 56.251882] CPU: 1 PID: 220 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 56.252416] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 56.253007] Call Trace: [ 56.253201] [ 56.253388] dump_stack_lvl+0x91/0xf0 [ 56.253693] print_report+0xcc/0x620 [ 56.253990] ? __virt_addr_valid+0x102/0x340 [ 56.254330] ? vma_interval_tree_remove+0xc75/0xec0 [ 56.254705] ? vma_interval_tree_remove+0xc75/0xec0 [ 56.255228] kasan_report+0xbe/0xf0 [ 56.255519] ? vma_interval_tree_remove+0xc75/0xec0 [ 56.255904] vma_interval_tree_remove+0xc75/0xec0 [ 56.256313] vma_prepare+0xc54/0x11a0 [ 56.256632] __split_vma+0x5af/0x950 [ 56.256922] ? __pfx___split_vma+0x10/0x10 [ 56.257252] ? find_held_lock+0x2c/0x110 [ 56.257569] do_vmi_align_munmap+0x2ba/0x11f0 [ 56.257910] ? lock_is_held_type+0x9f/0x120 [ 56.258237] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 56.258605] ? mtree_range_walk+0x632/0x900 [ 56.258947] ? mas_walk+0x5c7/0x7c0 [ 56.259235] do_vmi_munmap+0x1f1/0x2b0 [ 56.259538] mmap_region+0x1f9/0x2660 [ 56.259830] ? vm_mmap_pgoff+0x15c/0x3a0 [ 56.260143] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 56.260593] ? __pfx_lock_acquire+0x10/0x10 [ 56.260918] ? __pfx_mmap_region+0x10/0x10 [ 56.261268] ? security_mmap_addr+0x7d/0xa0 [ 56.261620] ? get_unmapped_area+0x1f5/0x3f0 [ 56.261957] do_mmap+0x854/0xf00 [ 56.262222] vm_mmap_pgoff+0x1a6/0x3a0 [ 56.262536] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 56.262901] ksys_mmap_pgoff+0x3af/0x500 [ 56.263228] do_syscall_64+0x3f/0x90 [ 56.263528] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 56.263937] RIP: 0033:0x7f0a397a3d82 [ 56.264250] 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 [ 56.265579] RSP: 002b:00007ffc13861ec8 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 56.266163] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f0a397a3d82 [ 56.266720] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f0a38bdd000 [ 56.267273] RBP: 00007f0a38bdd000 R08: 0000000000000009 R09: 0000000000001000 [ 56.267828] R10: 0000000000000812 R11: 0000000000000206 R12: 0000556aef641ec0 [ 56.268400] R13: 00007ffc13861ee0 R14: 00007ffc13861f10 R15: 00007ffc13862270 [ 56.268972] [ 56.269162] [ 56.269301] Allocated by task 213: [ 56.269573] kasan_save_stack+0x22/0x50 [ 56.269906] kasan_set_track+0x25/0x30 [ 56.270224] __kasan_slab_alloc+0x59/0x70 [ 56.270570] kmem_cache_alloc+0x16b/0x370 [ 56.270900] vm_area_dup+0x20/0x160 [ 56.271182] __split_vma+0x170/0x950 [ 56.271486] split_vma+0xc6/0x110 [ 56.271774] mprotect_fixup+0x8d2/0xb30 [ 56.272096] do_mprotect_pkey+0x87e/0xd40 [ 56.272441] __x64_sys_mprotect+0x78/0xc0 [ 56.272775] do_syscall_64+0x3f/0x90 [ 56.273089] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 56.273514] [ 56.273656] Freed by task 213: [ 56.273913] kasan_save_stack+0x22/0x50 [ 56.274242] kasan_set_track+0x25/0x30 [ 56.274558] kasan_save_free_info+0x2b/0x50 [ 56.274906] __kasan_slab_free+0x10a/0x190 [ 56.275254] kmem_cache_free+0x10d/0x4d0 [ 56.275577] rcu_core+0x8c8/0x2860 [ 56.275863] __do_softirq+0x1b7/0x7d4 [ 56.276178] [ 56.276330] Last potentially related work creation: [ 56.276717] kasan_save_stack+0x22/0x50 [ 56.277042] __kasan_record_aux_stack+0x8e/0xa0 [ 56.277427] __call_rcu_common.constprop.0+0x6a/0xb90 [ 56.277836] remove_vma+0x139/0x170 [ 56.278137] do_vmi_align_munmap+0xd4a/0x11f0 [ 56.278504] do_vmi_munmap+0x1f1/0x2b0 [ 56.278825] __vm_munmap+0x138/0x3a0 [ 56.279126] __x64_sys_munmap+0x59/0x80 [ 56.279452] do_syscall_64+0x3f/0x90 [ 56.279757] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 56.280180] [ 56.280324] The buggy address belongs to the object at ffff88800cb10910 [ 56.280324] which belongs to the cache vm_area_struct of size 168 [ 56.281277] The buggy address is located 88 bytes inside of [ 56.281277] freed 168-byte region [ffff88800cb10910, ffff88800cb109b8) [ 56.282200] [ 56.282345] The buggy address belongs to the physical page: [ 56.282786] page:00000000f0dc4293 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xcb10 [ 56.283501] memcg:ffff88800957b001 [ 56.283779] flags: 0x100000000000200(slab|node=0|zone=1) [ 56.284212] page_type: 0xffffffff() [ 56.284523] raw: 0100000000000200 ffff88800879fc80 ffffea0000372b40 dead000000000006 [ 56.285119] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800957b001 [ 56.285718] page dumped because: kasan: bad access detected [ 56.286152] [ 56.286290] Memory state around the buggy address: [ 56.286675] ffff88800cb10800: fc fc fc fc fc 00 00 00 00 00 00 00 00 00 00 00 [ 56.287229] ffff88800cb10880: 00 00 00 00 00 00 00 00 00 00 fc fc fc fc fc fc [ 56.287791] >ffff88800cb10900: fc fc fa fb fb fb fb fb fb fb fb fb fb fb fb fb [ 56.288361] ^ [ 56.288898] ffff88800cb10980: fb fb fb fb fb fb fb fc fc fc fc fc fc fc fc fa [ 56.289461] ffff88800cb10a00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 56.290009] ================================================================== [ 56.290605] Disabling lock debugging due to kernel taint [ 58.284751] BUG: Bad rss-counter state mm:000000006d2631a7 type:MM_FILEPAGES val:33 [ 58.285909] BUG: Bad rss-counter state mm:000000006d2631a7 type:MM_ANONPAGES val:22 [ 58.798839] BUG: Bad rss-counter state mm:000000002bb180b3 type:MM_FILEPAGES val:33 [ 58.799918] BUG: Bad rss-counter state mm:000000002bb180b3 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:43759' (ECDSA) to the list of known hosts. 2023/06/19 22:14:25 fuzzer started 2023/06/19 22:14:25 dialing manager at localhost:44161 2023/06/19 22:14:25 checking machine... 2023/06/19 22:14:25 checking revisions... [ 59.560761] kmemleak: Automatic memory scanning thread ended 2023/06/19 22:14:25 testing simple program... [ 59.610364] cgroup: Unknown subsys name 'net' [ 59.664188] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 22:14:04 Registers: info registers vcpu 0 RAX=0000000000000000 RBX=0000000000000051 RCX=0000000000000000 RDX=ffff8880102251c0 RSI=ffffffff818a8519 RDI=0000000000000007 RBP=ffff8880146c3320 RSP=ffff88800d9cfb08 R8 =0000000000000007 R9 =fffffffffffff000 R10=ffff8880146c3320 R11=00000000000b6996 R12=ffff88800d9cfc48 R13=dffffc0000000000 R14=0000000000000001 R15=ffff88800d9cfdf0 RIP=ffffffff814c081b 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 00007fd213d18900 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=00007fd21314b460 CR3=000000000ee32000 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=ffffffffffffffffffffffffffffffff XMM01=30306234386136303638616663356134 XMM02=38303062343861363036386166633561 XMM03=2f6c616e72756f6a2f676f6c2f6e7572 XMM04=5f4d53a99743e0ad00000000000ae988 XMM05=db20a56269ce068e0000000000134ac8 XMM06=19e9129bd510f23500000000001338a0 XMM07=00000000000000000000000000000000 XMM08=415453454d49545f454d49544c414552 XMM09=00000000000000000000000000000000 XMM10=20200000000020202020202020200000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=0000000000000000 RBX=0000000000000fe0 RCX=ffffffff8226ff42 RDX=ffff888015fb51c0 RSI=0000000000000000 RDI=0000000000000006 RBP=00007ffffffff000 RSP=ffff888015c77d18 R8 =0000000000000006 R9 =00007fe80c522b31 R10=00007ffffffff000 R11=00000000000b6996 R12=00007fe80c522b31 R13=ffff888015eeb320 R14=ffff888015eeb320 R15=ffffffff85d3ce80 RIP=ffffffff814c07e4 RFL=00000283 [--S---C] 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 00007fe80c547900 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=00007ffdf5b42000 CR3=000000000e9da000 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