syzkaller login: [ 39.027795] BUG: Bad rss-counter state mm:00000000fdc0691d type:MM_FILEPAGES val:33 [ 39.029731] BUG: Bad rss-counter state mm:00000000fdc0691d type:MM_ANONPAGES val:22 [ 39.191343] ================================================================== [ 39.192296] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 39.193274] Read of size 8 at addr ffff88800dafb880 by task sshd/225 [ 39.194065] [ 39.194291] CPU: 0 PID: 225 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 39.195297] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 39.196323] Call Trace: [ 39.196686] [ 39.196974] dump_stack_lvl+0x91/0xf0 [ 39.197469] print_report+0xcc/0x620 [ 39.197981] ? __virt_addr_valid+0x102/0x340 [ 39.198539] ? vma_interval_tree_remove+0xc75/0xec0 [ 39.199189] ? vma_interval_tree_remove+0xc75/0xec0 [ 39.199850] kasan_report+0xbe/0xf0 [ 39.200330] ? vma_interval_tree_remove+0xc75/0xec0 [ 39.200993] vma_interval_tree_remove+0xc75/0xec0 [ 39.201629] vma_prepare+0xc54/0x11a0 [ 39.202127] __split_vma+0x5af/0x950 [ 39.202632] ? __pfx___split_vma+0x10/0x10 [ 39.203170] ? find_held_lock+0x2c/0x110 [ 39.203732] do_vmi_align_munmap+0x2ba/0x11f0 [ 39.204312] ? lock_is_held_type+0x9f/0x120 [ 39.204881] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 39.205505] ? mtree_range_walk+0x632/0x900 [ 39.206077] ? mas_walk+0x5c7/0x7c0 [ 39.206549] do_vmi_munmap+0x1f1/0x2b0 [ 39.207086] mmap_region+0x1f9/0x2660 [ 39.207586] ? vm_mmap_pgoff+0x15c/0x3a0 [ 39.208145] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 39.208905] ? __pfx_lock_acquire+0x10/0x10 [ 39.209476] ? __pfx_mmap_region+0x10/0x10 [ 39.210040] ? security_mmap_addr+0x7d/0xa0 [ 39.210571] ? get_unmapped_area+0x1f5/0x3f0 [ 39.211156] do_mmap+0x854/0xf00 [ 39.211605] vm_mmap_pgoff+0x1a6/0x3a0 [ 39.212132] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 39.212722] ksys_mmap_pgoff+0x3af/0x500 [ 39.213240] do_syscall_64+0x3f/0x90 [ 39.213750] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 39.214396] RIP: 0033:0x7fa0779f6d82 [ 39.214894] 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 [ 39.217088] RSP: 002b:00007ffe9ed18778 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 39.218038] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007fa0779f6d82 [ 39.218931] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007fa076e30000 [ 39.219827] RBP: 00007fa076e30000 R08: 0000000000000009 R09: 0000000000001000 [ 39.220716] R10: 0000000000000812 R11: 0000000000000206 R12: 000055ff42e5bec0 [ 39.221594] R13: 00007ffe9ed18790 R14: 00007ffe9ed187c0 R15: 00007ffe9ed18b20 [ 39.222496] [ 39.222831] [ 39.223051] Allocated by task 218: [ 39.223490] kasan_save_stack+0x22/0x50 [ 39.224027] kasan_set_track+0x25/0x30 [ 39.224531] __kasan_slab_alloc+0x59/0x70 [ 39.225079] kmem_cache_alloc+0x16b/0x370 [ 39.225609] vm_area_dup+0x20/0x160 [ 39.226085] __split_vma+0x170/0x950 [ 39.226565] split_vma+0xc6/0x110 [ 39.227050] mprotect_fixup+0x8d2/0xb30 [ 39.227555] do_mprotect_pkey+0x87e/0xd40 [ 39.228121] __x64_sys_mprotect+0x78/0xc0 [ 39.228660] do_syscall_64+0x3f/0x90 [ 39.229145] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 39.229832] [ 39.230055] Freed by task 218: [ 39.230463] kasan_save_stack+0x22/0x50 [ 39.231001] kasan_set_track+0x25/0x30 [ 39.231508] kasan_save_free_info+0x2b/0x50 [ 39.232096] __kasan_slab_free+0x10a/0x190 [ 39.232658] kmem_cache_free+0x10d/0x4d0 [ 39.233176] rcu_core+0x8c8/0x2860 [ 39.233636] __do_softirq+0x1b7/0x7d4 [ 39.234122] [ 39.234349] Last potentially related work creation: [ 39.234987] kasan_save_stack+0x22/0x50 [ 39.235509] __kasan_record_aux_stack+0x8e/0xa0 [ 39.236132] __call_rcu_common.constprop.0+0x6a/0xb90 [ 39.236806] remove_vma+0x139/0x170 [ 39.237269] do_vmi_align_munmap+0xd4a/0x11f0 [ 39.237861] do_vmi_munmap+0x1f1/0x2b0 [ 39.238356] __vm_munmap+0x138/0x3a0 [ 39.238855] __x64_sys_munmap+0x59/0x80 [ 39.239369] do_syscall_64+0x3f/0x90 [ 39.239887] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 39.240539] [ 39.240772] Second to last potentially related work creation: [ 39.241473] kasan_save_stack+0x22/0x50 [ 39.242007] __kasan_record_aux_stack+0x8e/0xa0 [ 39.242601] __call_rcu_common.constprop.0+0x6a/0xb90 [ 39.243296] remove_vma+0x139/0x170 [ 39.243784] do_vmi_align_munmap+0xd4a/0x11f0 [ 39.244358] do_vmi_munmap+0x1f1/0x2b0 [ 39.244868] mmap_region+0x1f9/0x2660 [ 39.245357] do_mmap+0x854/0xf00 [ 39.245820] vm_mmap_pgoff+0x1a6/0x3a0 [ 39.246320] ksys_mmap_pgoff+0x3af/0x500 [ 39.246868] do_syscall_64+0x3f/0x90 [ 39.247349] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 39.248038] [ 39.248257] The buggy address belongs to the object at ffff88800dafb828 [ 39.248257] which belongs to the cache vm_area_struct of size 168 [ 39.249811] The buggy address is located 88 bytes inside of [ 39.249811] freed 168-byte region [ffff88800dafb828, ffff88800dafb8d0) [ 39.251415] [ 39.251709] The buggy address belongs to the physical page: [ 39.252597] page:000000003048202d refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xdafb [ 39.254017] memcg:ffff88800eff9501 [ 39.254460] flags: 0x100000000000200(slab|node=0|zone=1) [ 39.255157] page_type: 0xffffffff() [ 39.255643] raw: 0100000000000200 ffff88800879fc80 dead000000000100 dead000000000122 [ 39.256595] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800eff9501 [ 39.257543] page dumped because: kasan: bad access detected [ 39.258249] [ 39.258466] Memory state around the buggy address: [ 39.259094] ffff88800dafb780: 00 00 00 00 00 00 00 00 00 00 00 00 00 fc fc fc [ 39.260067] ffff88800dafb800: fc fc fc fc fc fa fb fb fb fb fb fb fb fb fb fb [ 39.260974] >ffff88800dafb880: fb fb fb fb fb fb fb fb fb fb fc fc fc fc fc fc [ 39.261877] ^ [ 39.262299] ffff88800dafb900: fc fc 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 39.263191] ffff88800dafb980: 00 00 00 00 00 00 00 fc fc fc fc fc fc fc fc 00 [ 39.264082] ================================================================== [ 39.265090] Disabling lock debugging due to kernel taint [ 41.909721] BUG: Bad rss-counter state mm:0000000085839dad type:MM_FILEPAGES val:33 [ 41.910712] BUG: Bad rss-counter state mm:0000000085839dad type:MM_ANONPAGES val:22 [ 42.304996] BUG: Bad rss-counter state mm:00000000c6971c75 type:MM_FILEPAGES val:33 [ 42.306203] BUG: Bad rss-counter state mm:00000000c6971c75 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:1391' (ECDSA) to the list of known hosts. 2023/06/19 12:59:07 fuzzer started 2023/06/19 12:59:07 dialing manager at localhost:44161 2023/06/19 12:59:07 checking machine... 2023/06/19 12:59:07 checking revisions... [ 43.018855] kmemleak: Automatic memory scanning thread ended 2023/06/19 12:59:07 testing simple program... [ 43.067663] cgroup: Unknown subsys name 'net' [ 43.119922] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 12:59:06 Registers: info registers vcpu 0 RAX=ffff88806ce35000 RBX=0000000000000000 RCX=ffffffff8450c50e RDX=ffffed100d9c6a01 RSI=0000000000000004 RDI=ffffffff812889a5 RBP=dffffc0000000000 RSP=ffffffff85407e10 R8 =0000000000000000 R9 =ffffed100d9c6a00 R10=ffff88806ce35003 R11=0000000000000001 R12=ffffffff85d3bed0 R13=1ffffffff0a80fc7 R14=0000000000000000 R15=0000000000000000 RIP=ffffffff8450d49f 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=00007ffdd4ea7288 CR3=0000000005482000 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=00007f3756adb5100000562f7d696790 XMM02=6f6974707972636e6561737268746977 XMM03=00000000000000000000000000777074 XMM04=40404040404040404040404040404040 XMM05=5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a XMM06=20202020202020202020202020202020 XMM07=ffffffffffff00ffffff00ffffff00ff XMM08=00002000000000202020002020200000 XMM09=ffffffffffff00ffffff00ffffff00ff XMM10=00002000000000202020002020200000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=0000000000000002 RBX=0000000000000000 RCX=0000000000000000 RDX=0000000000000000 RSI=ffffffff81efd8f2 RDI=ffff88800c679f34 RBP=0000000000000001 RSP=ffff888016997808 R8 =0000000000000005 R9 =0000000000000000 R10=0000000010000000 R11=00000000000b6996 R12=0000000010000000 R13=0000000000000008 R14=0000000000000005 R15=ffff888016997888 RIP=ffffffff814c07e0 RFL=00000297 [--S-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 00007f5019506900 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=00007f5019abb650 CR3=00000000166a0000 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=000000000000000000000000000000ff XMM02=000000000000000000000000000000ff XMM03=5320444f4854454d5f54505952434e45 XMM04=40404040404040404040404040404040 XMM05=5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a XMM06=20202020202020202020202020202020 XMM07=00000000000000000000000000000000 XMM08=ffbc64ffffbc44ffffbc34ffffbc9f00 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000