syzkaller login: [ 30.915253] BUG: Bad rss-counter state mm:000000006389ad33 type:MM_FILEPAGES val:33 [ 30.916264] BUG: Bad rss-counter state mm:000000006389ad33 type:MM_ANONPAGES val:22 [ 31.088771] ================================================================== [ 31.089883] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 31.091022] Read of size 8 at addr ffff88800d5fb5c8 by task sshd/221 [ 31.092141] [ 31.092380] CPU: 1 PID: 221 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 31.093288] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 31.094313] Call Trace: [ 31.094649] [ 31.094949] dump_stack_lvl+0x91/0xf0 [ 31.095464] print_report+0xcc/0x620 [ 31.095977] ? __virt_addr_valid+0x102/0x340 [ 31.096562] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.097206] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.097871] kasan_report+0xbe/0xf0 [ 31.098383] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.099047] vma_interval_tree_remove+0xc75/0xec0 [ 31.099709] vma_prepare+0xc54/0x11a0 [ 31.100218] __split_vma+0x5af/0x950 [ 31.100721] ? __pfx___split_vma+0x10/0x10 [ 31.101291] ? find_held_lock+0x2c/0x110 [ 31.101850] do_vmi_align_munmap+0x2ba/0x11f0 [ 31.102455] ? lock_is_held_type+0x9f/0x120 [ 31.103034] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 31.103701] ? mtree_range_walk+0x632/0x900 [ 31.104302] ? mas_walk+0x5c7/0x7c0 [ 31.104809] do_vmi_munmap+0x1f1/0x2b0 [ 31.105332] mmap_region+0x1f9/0x2660 [ 31.105843] ? vm_mmap_pgoff+0x15c/0x3a0 [ 31.106387] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 31.107144] ? __pfx_lock_acquire+0x10/0x10 [ 31.107720] ? __pfx_mmap_region+0x10/0x10 [ 31.108278] ? security_mmap_addr+0x7d/0xa0 [ 31.108842] ? get_unmapped_area+0x1f5/0x3f0 [ 31.109431] do_mmap+0x854/0xf00 [ 31.109895] vm_mmap_pgoff+0x1a6/0x3a0 [ 31.110417] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 31.111017] ksys_mmap_pgoff+0x3af/0x500 [ 31.111574] do_syscall_64+0x3f/0x90 [ 31.112088] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.112774] RIP: 0033:0x7fd8d3b67d82 [ 31.113262] 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 [ 31.115525] RSP: 002b:00007ffdbd9af118 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 31.116486] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007fd8d3b67d82 [ 31.117387] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007fd8d2fa1000 [ 31.118283] RBP: 00007fd8d2fa1000 R08: 0000000000000009 R09: 0000000000001000 [ 31.119170] R10: 0000000000000812 R11: 0000000000000206 R12: 0000555a76753ec0 [ 31.120069] R13: 00007ffdbd9af130 R14: 00007ffdbd9af160 R15: 00007ffdbd9af4c0 [ 31.120968] [ 31.121274] [ 31.121497] Allocated by task 214: [ 31.121952] kasan_save_stack+0x22/0x50 [ 31.122485] kasan_set_track+0x25/0x30 [ 31.123005] __kasan_slab_alloc+0x59/0x70 [ 31.123571] kmem_cache_alloc+0x16b/0x370 [ 31.124121] vm_area_dup+0x20/0x160 [ 31.124593] __split_vma+0x170/0x950 [ 31.125076] split_vma+0xc6/0x110 [ 31.125535] mprotect_fixup+0x8d2/0xb30 [ 31.126060] do_mprotect_pkey+0x87e/0xd40 [ 31.126604] __x64_sys_mprotect+0x78/0xc0 [ 31.127139] do_syscall_64+0x3f/0x90 [ 31.127643] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.128302] [ 31.128528] Freed by task 214: [ 31.128932] kasan_save_stack+0x22/0x50 [ 31.129454] kasan_set_track+0x25/0x30 [ 31.129972] kasan_save_free_info+0x2b/0x50 [ 31.130530] __kasan_slab_free+0x10a/0x190 [ 31.131088] kmem_cache_free+0x10d/0x4d0 [ 31.131630] rcu_core+0x8c8/0x2860 [ 31.132172] __do_softirq+0x1b7/0x7d4 [ 31.132666] [ 31.132891] Last potentially related work creation: [ 31.133500] kasan_save_stack+0x22/0x50 [ 31.134025] __kasan_record_aux_stack+0x8e/0xa0 [ 31.134615] __call_rcu_common.constprop.0+0x6a/0xb90 [ 31.135271] remove_vma+0x139/0x170 [ 31.135746] do_vmi_align_munmap+0xd4a/0x11f0 [ 31.136321] do_vmi_munmap+0x1f1/0x2b0 [ 31.136818] __vm_munmap+0x138/0x3a0 [ 31.137304] __x64_sys_munmap+0x59/0x80 [ 31.137815] do_syscall_64+0x3f/0x90 [ 31.138300] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.138967] [ 31.139191] Second to last potentially related work creation: [ 31.139913] kasan_save_stack+0x22/0x50 [ 31.140432] __kasan_record_aux_stack+0x8e/0xa0 [ 31.141021] __call_rcu_common.constprop.0+0x6a/0xb90 [ 31.141678] remove_vma+0x139/0x170 [ 31.142143] do_vmi_align_munmap+0xd4a/0x11f0 [ 31.142715] do_vmi_munmap+0x1f1/0x2b0 [ 31.143221] mmap_region+0x1f9/0x2660 [ 31.143719] do_mmap+0x854/0xf00 [ 31.144161] vm_mmap_pgoff+0x1a6/0x3a0 [ 31.144659] ksys_mmap_pgoff+0x3af/0x500 [ 31.145172] do_syscall_64+0x3f/0x90 [ 31.145660] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.146317] [ 31.146544] The buggy address belongs to the object at ffff88800d5fb570 [ 31.146544] which belongs to the cache vm_area_struct of size 168 [ 31.148084] The buggy address is located 88 bytes inside of [ 31.148084] freed 168-byte region [ffff88800d5fb570, ffff88800d5fb618) [ 31.149520] [ 31.149740] The buggy address belongs to the physical page: [ 31.150411] page:0000000093e4cc2a refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xd5fb [ 31.151517] memcg:ffff88800cba0101 [ 31.151964] anon flags: 0x100000000000200(slab|node=0|zone=1) [ 31.152682] page_type: 0xffffffff() [ 31.153142] raw: 0100000000000200 ffff8880087a0c80 0000000000000000 dead000000000001 [ 31.154082] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800cba0101 [ 31.155000] page dumped because: kasan: bad access detected [ 31.155676] [ 31.155898] Memory state around the buggy address: [ 31.156492] ffff88800d5fb480: fc 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 31.157361] ffff88800d5fb500: 00 00 00 00 00 00 fc fc fc fc fc fc fc fc fa fb [ 31.158231] >ffff88800d5fb580: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 31.159096] ^ [ 31.159791] ffff88800d5fb600: fb fb fb fc fc fc fc fc fc fc fc 00 00 00 00 00 [ 31.160649] ffff88800d5fb680: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 31.161500] ================================================================== [ 31.162624] Disabling lock debugging due to kernel taint [ 33.331603] BUG: Bad rss-counter state mm:00000000df2c3556 type:MM_FILEPAGES val:33 [ 33.332828] BUG: Bad rss-counter state mm:00000000df2c3556 type:MM_ANONPAGES val:22 [ 33.849026] BUG: Bad rss-counter state mm:00000000c477b93d type:MM_FILEPAGES val:33 [ 33.850236] BUG: Bad rss-counter state mm:00000000c477b93d type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:45158' (ECDSA) to the list of known hosts. 2023/06/20 14:57:14 fuzzer started 2023/06/20 14:57:14 dialing manager at localhost:36067 2023/06/20 14:57:14 checking machine... 2023/06/20 14:57:14 checking revisions... [ 34.449132] kmemleak: Automatic memory scanning thread ended 2023/06/20 14:57:14 testing simple program... [ 34.505347] cgroup: Unknown subsys name 'net' [ 34.568942] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 14:57:14 Registers: info registers vcpu 0 RAX=0000000000000000 RBX=0000000000000002 RCX=ffffffff8613961e RDX=0000000000000000 RSI=0000000000000001 RDI=0000000000000001 RBP=ffff88806ce09ac8 RSP=ffff88806ce09a00 R8 =ffffffff86139622 R9 =ffff88806ce09ab0 R10=0000000000038001 R11=0000000000020ed2 R12=ffff88806ce09ad0 R13=ffff88806ce09ab8 R14=ffff88806ce09ab1 R15=ffff88806ce09a70 RIP=ffffffff81130ad6 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 00007fc67d5f8900 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=00007fc67dbaf618 CR3=000000000e824000 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=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 info registers vcpu 1 RAX=0000000080010001 RBX=000000000000dd50 RCX=0000000000000000 RDX=ffff888008d951c0 RSI=ffffffff813c9237 RDI=ffffffff85d3d350 RBP=0000000000000004 RSP=ffff88806cf09f78 R8 =0000000000000000 R9 =fffffbfff0ba7a6a R10=ffffffff85d3d357 R11=ffff88806cf09ff8 R12=0000000000000001 R13=0000000000000000 R14=0000000000000000 R15=dffffc0000000000 RIP=ffffffff813c9246 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 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=00007f8163140250 CR3=0000000009672000 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=1e32512b53e099a4e9459b89ecca8a3b XMM02=2c67c8bc2e329bc3000000000011b588 XMM03=fb795ef6d65770560000000000122258 XMM04=8fe85207a5445ab000000000000ae988 XMM05=445bfe46c5915a520000000000133878 XMM06=c291bd5c70af25b90000000000133270 XMM07=e042d86d42eb936e00000000001224d8 XMM08=ef064c6f57b0f699000000000011b5e8 XMM09=00000000000000000000000000000000 XMM10=20200000000020202020202020200000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000