syzkaller login: [ 61.933993] BUG: Bad rss-counter state mm:000000007cb12ad2 type:MM_FILEPAGES val:33 [ 61.935028] BUG: Bad rss-counter state mm:000000007cb12ad2 type:MM_ANONPAGES val:22 [ 62.102747] ================================================================== [ 62.103659] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 62.104601] Read of size 8 at addr ffff88800cf753f8 by task sshd/220 [ 62.105375] [ 62.105591] CPU: 0 PID: 220 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 62.106572] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 62.107544] Call Trace: [ 62.107866] [ 62.108165] dump_stack_lvl+0x91/0xf0 [ 62.108658] print_report+0xcc/0x620 [ 62.109147] ? __virt_addr_valid+0x102/0x340 [ 62.109711] ? vma_interval_tree_remove+0xc75/0xec0 [ 62.110333] ? vma_interval_tree_remove+0xc75/0xec0 [ 62.110981] kasan_report+0xbe/0xf0 [ 62.111463] ? vma_interval_tree_remove+0xc75/0xec0 [ 62.112090] vma_interval_tree_remove+0xc75/0xec0 [ 62.112695] vma_prepare+0xc54/0x11a0 [ 62.113178] __split_vma+0x5af/0x950 [ 62.113657] ? __pfx___split_vma+0x10/0x10 [ 62.114188] ? find_held_lock+0x2c/0x110 [ 62.114729] do_vmi_align_munmap+0x2ba/0x11f0 [ 62.115301] ? lock_is_held_type+0x9f/0x120 [ 62.115852] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 62.116466] ? mtree_range_walk+0x632/0x900 [ 62.117024] ? mas_walk+0x5c7/0x7c0 [ 62.117497] do_vmi_munmap+0x1f1/0x2b0 [ 62.117998] mmap_region+0x1f9/0x2660 [ 62.118486] ? vm_mmap_pgoff+0x15c/0x3a0 [ 62.119028] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 62.119751] ? __pfx_lock_acquire+0x10/0x10 [ 62.120292] ? __pfx_mmap_region+0x10/0x10 [ 62.120830] ? security_mmap_addr+0x7d/0xa0 [ 62.121371] ? get_unmapped_area+0x1f5/0x3f0 [ 62.121934] do_mmap+0x854/0xf00 [ 62.122380] vm_mmap_pgoff+0x1a6/0x3a0 [ 62.122897] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 62.123472] ksys_mmap_pgoff+0x3af/0x500 [ 62.123984] do_syscall_64+0x3f/0x90 [ 62.124472] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 62.125123] RIP: 0033:0x7f22cf9dbd82 [ 62.125586] 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 [ 62.127735] RSP: 002b:00007fffe77db2b8 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 62.128670] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f22cf9dbd82 [ 62.129540] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f22cee15000 [ 62.130414] RBP: 00007f22cee15000 R08: 0000000000000009 R09: 0000000000001000 [ 62.131301] R10: 0000000000000812 R11: 0000000000000206 R12: 00005645a0e79ec0 [ 62.132173] R13: 00007fffe77db2d0 R14: 00007fffe77db300 R15: 00007fffe77db660 [ 62.133068] [ 62.133371] [ 62.133592] Allocated by task 213: [ 62.134036] kasan_save_stack+0x22/0x50 [ 62.134600] kasan_set_track+0x25/0x30 [ 62.135111] __kasan_slab_alloc+0x59/0x70 [ 62.135635] kmem_cache_alloc+0x16b/0x370 [ 62.136171] vm_area_dup+0x20/0x160 [ 62.136633] __split_vma+0x170/0x950 [ 62.137105] split_vma+0xc6/0x110 [ 62.137565] mprotect_fixup+0x8d2/0xb30 [ 62.138077] do_mprotect_pkey+0x87e/0xd40 [ 62.138623] __x64_sys_mprotect+0x78/0xc0 [ 62.139181] do_syscall_64+0x3f/0x90 [ 62.139677] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 62.140332] [ 62.140555] Freed by task 19: [ 62.140942] kasan_save_stack+0x22/0x50 [ 62.141475] kasan_set_track+0x25/0x30 [ 62.141986] kasan_save_free_info+0x2b/0x50 [ 62.142549] __kasan_slab_free+0x10a/0x190 [ 62.143084] kmem_cache_free+0x10d/0x4d0 [ 62.143596] rcu_core+0x8c8/0x2860 [ 62.144049] __do_softirq+0x1b7/0x7d4 [ 62.144528] [ 62.144746] Last potentially related work creation: [ 62.145343] kasan_save_stack+0x22/0x50 [ 62.145855] __kasan_record_aux_stack+0x8e/0xa0 [ 62.146436] __call_rcu_common.constprop.0+0x6a/0xb90 [ 62.147114] remove_vma+0x139/0x170 [ 62.147599] do_vmi_align_munmap+0xd4a/0x11f0 [ 62.148159] do_vmi_munmap+0x1f1/0x2b0 [ 62.148655] __vm_munmap+0x138/0x3a0 [ 62.149140] __x64_sys_munmap+0x59/0x80 [ 62.149664] do_syscall_64+0x3f/0x90 [ 62.150146] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 62.150833] [ 62.151056] Second to last potentially related work creation: [ 62.151765] kasan_save_stack+0x22/0x50 [ 62.152268] __kasan_record_aux_stack+0x8e/0xa0 [ 62.152877] __call_rcu_common.constprop.0+0x6a/0xb90 [ 62.153550] remove_vma+0x139/0x170 [ 62.154010] do_vmi_align_munmap+0xd4a/0x11f0 [ 62.154582] do_vmi_munmap+0x1f1/0x2b0 [ 62.155079] mmap_region+0x1f9/0x2660 [ 62.155557] do_mmap+0x854/0xf00 [ 62.156003] vm_mmap_pgoff+0x1a6/0x3a0 [ 62.156499] ksys_mmap_pgoff+0x7d/0x500 [ 62.157006] do_syscall_64+0x3f/0x90 [ 62.157489] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 62.158135] [ 62.158350] The buggy address belongs to the object at ffff88800cf753a0 [ 62.158350] which belongs to the cache vm_area_struct of size 168 [ 62.159835] The buggy address is located 88 bytes inside of [ 62.159835] freed 168-byte region [ffff88800cf753a0, ffff88800cf75448) [ 62.161239] [ 62.161470] The buggy address belongs to the physical page: [ 62.162166] page:00000000f180fc33 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xcf75 [ 62.163308] memcg:ffff88800dbb2901 [ 62.163759] anon flags: 0x100000000000200(slab|node=0|zone=1) [ 62.164502] page_type: 0xffffffff() [ 62.164969] raw: 0100000000000200 ffff88800879fc80 0000000000000000 dead000000000001 [ 62.165916] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800dbb2901 [ 62.166851] page dumped because: kasan: bad access detected [ 62.167527] [ 62.167742] Memory state around the buggy address: [ 62.168350] ffff88800cf75280: fc fc fc fc fc fc fc 00 00 00 00 00 00 00 00 00 [ 62.169234] ffff88800cf75300: 00 00 00 00 00 00 00 00 00 00 00 00 fc fc fc fc [ 62.170127] >ffff88800cf75380: fc fc fc fc fa fb fb fb fb fb fb fb fb fb fb fb [ 62.171037] ^ [ 62.171909] ffff88800cf75400: fb fb fb fb fb fb fb fb fb fc fc fc fc fc fc fc [ 62.172802] ffff88800cf75480: fc fa fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 62.173681] ================================================================== [ 62.174689] Disabling lock debugging due to kernel taint [ 63.986824] BUG: Bad rss-counter state mm:00000000ec6df02e type:MM_FILEPAGES val:33 [ 63.987801] BUG: Bad rss-counter state mm:00000000ec6df02e type:MM_ANONPAGES val:22 [ 64.546727] BUG: Bad rss-counter state mm:000000001c448680 type:MM_FILEPAGES val:33 [ 64.547906] BUG: Bad rss-counter state mm:000000001c448680 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:3962' (ECDSA) to the list of known hosts. 2023/06/19 18:48:04 fuzzer started 2023/06/19 18:48:04 dialing manager at localhost:44161 2023/06/19 18:48:04 checking machine... 2023/06/19 18:48:04 checking revisions... [ 65.178241] kmemleak: Automatic memory scanning thread ended 2023/06/19 18:48:04 testing simple program... [ 65.217880] cgroup: Unknown subsys name 'net' [ 65.285725] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 18:48:03 Registers: info registers vcpu 0 RAX=dffffc0000000000 RBX=ffff88800fceb680 RCX=0000000000000000 RDX=00000000000006e0 RSI=ffffffff814e626d RDI=ffff888008f6b310 RBP=ffff888008f6ae40 RSP=ffff88806ce09da8 R8 =0000000000000007 R9 =00000000000f423f R10=00000000001e4f47 R11=0000002a899ed28c R12=00000000001e4f47 R13=000000002efa74c7 R14=ffff88800d9df168 R15=dffffc0000000000 RIP=ffffffff814e629d RFL=00000046 [---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 00007f355e7ea900 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=00007fa42fa33650 CR3=000000000d7f6000 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=756f6a2f646d65747379732f6e75722f XMM01=00676f6c7379732f6c616e72756f6a2f XMM02=756f6a2f646d65747379732f6e75722f XMM03=006c616e72756f6a2f646d6574737973 XMM04=eded4cd244e797e100000000000ae988 XMM05=851d7f88f1e9c5610000000000136908 XMM06=4fda316b135da52b00000000001356f8 XMM07=fb795ef6d65770560000000000124970 XMM08=4f5453444600273d67736d000d0a0920 XMM09=00000000000000000000000000000000 XMM10=20200000000020202020202020200000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=ee2167b4262d3900 RBX=ffffffff85d3d010 RCX=ffffffff812d869a RDX=0000000000000000 RSI=0000000000000008 RDI=ffffffff85d3bed0 RBP=ffffed100d9e132e RSP=ffff88806cf09960 R8 =0000000000000000 R9 =fffffbfff0ba77da R10=ffffffff85d3bed7 R11=00000000000b6996 R12=ffffffff8560b640 R13=ffffffff814c84f5 R14=ffffffff85652a88 R15=ffff888015b5e540 RIP=ffffffff812d89f4 RFL=00000286 [--S--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 00007fa42f47e900 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=00007fa42fa35618 CR3=000000000de92000 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=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