syzkaller login: [ 31.594166] BUG: Bad rss-counter state mm:0000000096830ae6 type:MM_FILEPAGES val:33 [ 31.595450] BUG: Bad rss-counter state mm:0000000096830ae6 type:MM_ANONPAGES val:22 [ 31.731856] ================================================================== [ 31.732783] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 31.733721] Read of size 8 at addr ffff88800f00b880 by task sshd/222 [ 31.734606] [ 31.734858] CPU: 1 PID: 222 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 31.735733] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 31.736725] Call Trace: [ 31.737044] [ 31.737336] dump_stack_lvl+0x91/0xf0 [ 31.737828] print_report+0xcc/0x620 [ 31.738318] ? __virt_addr_valid+0x102/0x340 [ 31.738873] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.739520] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.740139] kasan_report+0xbe/0xf0 [ 31.740619] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.741243] vma_interval_tree_remove+0xc75/0xec0 [ 31.741862] vma_prepare+0xc54/0x11a0 [ 31.742365] __split_vma+0x5af/0x950 [ 31.742840] ? __pfx___split_vma+0x10/0x10 [ 31.743404] ? find_held_lock+0x2c/0x110 [ 31.743944] do_vmi_align_munmap+0x2ba/0x11f0 [ 31.744517] ? lock_is_held_type+0x9f/0x120 [ 31.745066] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 31.745684] ? mtree_range_walk+0x632/0x900 [ 31.746238] ? mas_walk+0x5c7/0x7c0 [ 31.746722] do_vmi_munmap+0x1f1/0x2b0 [ 31.747224] mmap_region+0x1f9/0x2660 [ 31.747722] ? vm_mmap_pgoff+0x15c/0x3a0 [ 31.748239] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 31.748957] ? __pfx_lock_acquire+0x10/0x10 [ 31.749498] ? __pfx_mmap_region+0x10/0x10 [ 31.750032] ? security_mmap_addr+0x7d/0xa0 [ 31.750572] ? get_unmapped_area+0x1f5/0x3f0 [ 31.751139] do_mmap+0x854/0xf00 [ 31.751583] vm_mmap_pgoff+0x1a6/0x3a0 [ 31.752100] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 31.752686] ksys_mmap_pgoff+0x3af/0x500 [ 31.753210] do_syscall_64+0x3f/0x90 [ 31.753707] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.754371] RIP: 0033:0x7f680d75bd82 [ 31.754835] 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 [ 31.757046] RSP: 002b:00007fff0f77bf28 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 31.757974] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f680d75bd82 [ 31.758845] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f680cb95000 [ 31.759741] RBP: 00007f680cb95000 R08: 0000000000000009 R09: 0000000000001000 [ 31.760614] R10: 0000000000000812 R11: 0000000000000206 R12: 000055e8ba54cec0 [ 31.761502] R13: 00007fff0f77bf40 R14: 00007fff0f77bf70 R15: 00007fff0f77c2d0 [ 31.762375] [ 31.762671] [ 31.762891] Allocated by task 215: [ 31.763344] kasan_save_stack+0x22/0x50 [ 31.763856] kasan_set_track+0x25/0x30 [ 31.764361] __kasan_slab_alloc+0x59/0x70 [ 31.764892] kmem_cache_alloc+0x16b/0x370 [ 31.765426] vm_area_dup+0x20/0x160 [ 31.765900] __split_vma+0x170/0x950 [ 31.766377] split_vma+0xc6/0x110 [ 31.766823] mprotect_fixup+0x8d2/0xb30 [ 31.767352] do_mprotect_pkey+0x87e/0xd40 [ 31.767900] __x64_sys_mprotect+0x78/0xc0 [ 31.768431] do_syscall_64+0x3f/0x90 [ 31.768931] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.769581] [ 31.769800] Freed by task 215: [ 31.770206] kasan_save_stack+0x22/0x50 [ 31.770719] kasan_set_track+0x25/0x30 [ 31.771380] kasan_save_free_info+0x2b/0x50 [ 31.772037] __kasan_slab_free+0x10a/0x190 [ 31.772718] kmem_cache_free+0x10d/0x4d0 [ 31.773351] rcu_core+0x8c8/0x2860 [ 31.773901] __do_softirq+0x1b7/0x7d4 [ 31.774507] [ 31.774773] Last potentially related work creation: [ 31.775537] kasan_save_stack+0x22/0x50 [ 31.776157] __kasan_record_aux_stack+0x8e/0xa0 [ 31.776877] __call_rcu_common.constprop.0+0x6a/0xb90 [ 31.777699] remove_vma+0x139/0x170 [ 31.778251] do_vmi_align_munmap+0xd4a/0x11f0 [ 31.778957] do_vmi_munmap+0x1f1/0x2b0 [ 31.779566] __vm_munmap+0x138/0x3a0 [ 31.780138] __x64_sys_munmap+0x59/0x80 [ 31.780772] do_syscall_64+0x3f/0x90 [ 31.781367] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.782185] [ 31.782461] The buggy address belongs to the object at ffff88800f00b828 [ 31.782461] which belongs to the cache vm_area_struct of size 168 [ 31.784294] The buggy address is located 88 bytes inside of [ 31.784294] freed 168-byte region [ffff88800f00b828, ffff88800f00b8d0) [ 31.786059] [ 31.786330] The buggy address belongs to the physical page: [ 31.787181] page:000000007873adaa refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xf00b [ 31.788344] memcg:ffff888016cab101 [ 31.788788] flags: 0x100000000000200(slab|node=0|zone=1) [ 31.789478] page_type: 0xffffffff() [ 31.789946] raw: 0100000000000200 ffff8880087a0c80 dead000000000122 0000000000000000 [ 31.790913] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff888016cab101 [ 31.791847] page dumped because: kasan: bad access detected [ 31.792541] [ 31.792762] Memory state around the buggy address: [ 31.793389] ffff88800f00b780: 00 00 00 00 00 00 00 00 00 00 00 00 00 fc fc fc [ 31.794273] ffff88800f00b800: fc fc fc fc fc fa fb fb fb fb fb fb fb fb fb fb [ 31.795181] >ffff88800f00b880: fb fb fb fb fb fb fb fb fb fb fc fc fc fc fc fc [ 31.796070] ^ [ 31.796512] ffff88800f00b900: fc fc fa fb fb fb fb fb fb fb fb fb fb fb fb fb [ 31.797398] ffff88800f00b980: fb fb fb fb fb fb fb fc fc fc fc fc fc fc fc 00 [ 31.798270] ================================================================== [ 31.799596] Disabling lock debugging due to kernel taint [ 33.751346] BUG: Bad rss-counter state mm:00000000636ee449 type:MM_FILEPAGES val:33 [ 33.752443] BUG: Bad rss-counter state mm:00000000636ee449 type:MM_ANONPAGES val:22 [ 34.237254] BUG: Bad rss-counter state mm:000000006e2e0535 type:MM_FILEPAGES val:33 [ 34.238438] BUG: Bad rss-counter state mm:000000006e2e0535 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:19708' (ECDSA) to the list of known hosts. 2023/06/21 00:24:21 fuzzer started 2023/06/21 00:24:21 dialing manager at localhost:36067 2023/06/21 00:24:21 checking machine... 2023/06/21 00:24:21 checking revisions... [ 34.938804] kmemleak: Automatic memory scanning thread ended 2023/06/21 00:24:22 testing simple program... [ 34.970496] cgroup: Unknown subsys name 'net' [ 35.023306] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 00:24:21 Registers: info registers vcpu 0 RAX=0000000000000001 RBX=ffff88806ce35000 RCX=ffffffff815342db RDX=0000000000000000 RSI=0000000000000008 RDI=ffffffff85d3d350 RBP=ffffffff84535ffc RSP=ffff8880102f7600 R8 =0000000000000000 R9 =fffffbfff0ba7a6a R10=ffffffff85d3d357 R11=00000000000b6a61 R12=ffff88800844f140 R13=0000000000482cc0 R14=ffff88800da2c900 R15=0000000000000000 RIP=ffffffff8135b979 RFL=00000002 [-------] 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 00007f05420f1900 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=00007f054160f020 CR3=000000000d882000 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=a42773b1043d25b300000000000ae988 XMM05=4c7c2124c8cc500f0000000000132ed8 XMM06=5a9d233068761c4a0000000000131d90 XMM07=fb795ef6d65770560000000000121f38 XMM08=4f5453444600273d67736d000d0a0920 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=ffffffff83650bf8 RBX=0000000000000001 RCX=0000000000000001 RDX=ffff88801bd67d01 RSI=ffff88801bd67d48 RDI=ffff88801bd67d48 RBP=ffff88801bd67840 RSP=ffff88801bd67770 R8 =ffffffff863b4bcc R9 =ffff88801bd67828 R10=0000000000038001 R11=000000000008ad20 R12=ffff88801bd67848 R13=ffff88801bd67830 R14=ffff88801bd67d50 R15=ffff88801bd677e8 RIP=ffffffff8112fbf3 RFL=00000202 [-------] 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 00007f809bb5e900 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=00007ffdc4cbd000 CR3=000000001bd72000 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=74696d7265705f6d61703d73726f746e XMM02=000000000000000000000000000000ff XMM03=5320444f4854454d5f54505952434e45 XMM04=40404040404040404040404040404040 XMM05=5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a XMM06=20202020202020202020202020202020 XMM07=00000000000000000000000000000000 XMM08=61662029286e65706f5f746964756100 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000