syzkaller login: [ 28.734524] BUG: Bad rss-counter state mm:0000000006941e16 type:MM_FILEPAGES val:33 [ 28.736027] BUG: Bad rss-counter state mm:0000000006941e16 type:MM_ANONPAGES val:22 [ 28.893141] ================================================================== [ 28.894129] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 28.895108] Read of size 8 at addr ffff888016575310 by task sshd/221 [ 28.896033] [ 28.896264] CPU: 1 PID: 221 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 28.897180] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 28.898206] Call Trace: [ 28.898544] [ 28.898845] dump_stack_lvl+0x91/0xf0 [ 28.899374] print_report+0xcc/0x620 [ 28.899883] ? __virt_addr_valid+0x102/0x340 [ 28.900475] ? vma_interval_tree_remove+0xc75/0xec0 [ 28.901120] ? vma_interval_tree_remove+0xc75/0xec0 [ 28.901768] kasan_report+0xbe/0xf0 [ 28.902269] ? vma_interval_tree_remove+0xc75/0xec0 [ 28.902922] vma_interval_tree_remove+0xc75/0xec0 [ 28.903560] vma_prepare+0xc54/0x11a0 [ 28.904062] __split_vma+0x5af/0x950 [ 28.904734] ? __pfx___split_vma+0x10/0x10 [ 28.905379] ? find_held_lock+0x2c/0x110 [ 28.906025] do_vmi_align_munmap+0x2ba/0x11f0 [ 28.906711] ? lock_is_held_type+0x9f/0x120 [ 28.907365] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 28.908097] ? mtree_range_walk+0x632/0x900 [ 28.908786] ? mas_walk+0x5c7/0x7c0 [ 28.909364] do_vmi_munmap+0x1f1/0x2b0 [ 28.909971] mmap_region+0x1f9/0x2660 [ 28.910564] ? vm_mmap_pgoff+0x15c/0x3a0 [ 28.911184] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 28.912044] ? __pfx_lock_acquire+0x10/0x10 [ 28.912706] ? __pfx_mmap_region+0x10/0x10 [ 28.913353] ? security_mmap_addr+0x7d/0xa0 [ 28.913900] ? get_unmapped_area+0x1f5/0x3f0 [ 28.914448] do_mmap+0x854/0xf00 [ 28.914892] vm_mmap_pgoff+0x1a6/0x3a0 [ 28.915394] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 28.915954] ksys_mmap_pgoff+0x3af/0x500 [ 28.916482] do_syscall_64+0x3f/0x90 [ 28.916960] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 28.917606] RIP: 0033:0x7f80d17ecd82 [ 28.918066] 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 [ 28.920180] RSP: 002b:00007fffede90e78 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 28.921085] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f80d17ecd82 [ 28.921942] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f80d0c26000 [ 28.922788] RBP: 00007f80d0c26000 R08: 0000000000000009 R09: 0000000000001000 [ 28.923645] R10: 0000000000000812 R11: 0000000000000206 R12: 00005584aa031d90 [ 28.924531] R13: 00007fffede90e90 R14: 00007fffede90ec0 R15: 00007fffede91220 [ 28.925403] [ 28.925693] [ 28.925912] Allocated by task 214: [ 28.926349] kasan_save_stack+0x22/0x50 [ 28.926865] kasan_set_track+0x25/0x30 [ 28.927364] __kasan_slab_alloc+0x59/0x70 [ 28.927895] kmem_cache_alloc+0x16b/0x370 [ 28.928416] vm_area_dup+0x20/0x160 [ 28.928871] __split_vma+0x170/0x950 [ 28.929334] split_vma+0xc6/0x110 [ 28.929776] mprotect_fixup+0x8d2/0xb30 [ 28.930283] do_mprotect_pkey+0x87e/0xd40 [ 28.930806] __x64_sys_mprotect+0x78/0xc0 [ 28.931333] do_syscall_64+0x3f/0x90 [ 28.931808] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 28.932493] [ 28.932714] Freed by task 214: [ 28.933109] kasan_save_stack+0x22/0x50 [ 28.933613] kasan_set_track+0x25/0x30 [ 28.934111] kasan_save_free_info+0x2b/0x50 [ 28.934651] __kasan_slab_free+0x10a/0x190 [ 28.935185] kmem_cache_free+0x10d/0x4d0 [ 28.935699] rcu_core+0x8c8/0x2860 [ 28.936147] __do_softirq+0x1b7/0x7d4 [ 28.936636] [ 28.936859] Last potentially related work creation: [ 28.937454] kasan_save_stack+0x22/0x50 [ 28.937955] __kasan_record_aux_stack+0x8e/0xa0 [ 28.938541] __call_rcu_common.constprop.0+0x6a/0xb90 [ 28.939181] remove_vma+0x139/0x170 [ 28.939635] do_vmi_align_munmap+0xd4a/0x11f0 [ 28.940190] do_vmi_munmap+0x1f1/0x2b0 [ 28.940678] __vm_munmap+0x138/0x3a0 [ 28.941149] __x64_sys_munmap+0x59/0x80 [ 28.941647] do_syscall_64+0x3f/0x90 [ 28.942116] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 28.942759] [ 28.942972] The buggy address belongs to the object at ffff8880165752b8 [ 28.942972] which belongs to the cache vm_area_struct of size 168 [ 28.944470] The buggy address is located 88 bytes inside of [ 28.944470] freed 168-byte region [ffff8880165752b8, ffff888016575360) [ 28.945880] [ 28.946099] The buggy address belongs to the physical page: [ 28.946776] page:00000000ace929df refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x16575 [ 28.947892] memcg:ffff88800bfcd101 [ 28.948324] flags: 0x100000000000200(slab|node=0|zone=1) [ 28.948973] page_type: 0xffffffff() [ 28.949425] raw: 0100000000000200 ffff8880087a0c80 dead000000000122 0000000000000000 [ 28.950334] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800bfcd101 [ 28.951238] page dumped because: kasan: bad access detected [ 28.951901] [ 28.952116] Memory state around the buggy address: [ 28.952768] ffff888016575200: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 fc [ 28.953632] ffff888016575280: fc fc fc fc fc fc fc fa fb fb fb fb fb fb fb fb [ 28.954494] >ffff888016575300: fb fb fb fb fb fb fb fb fb fb fb fb fc fc fc fc [ 28.955365] ^ [ 28.955841] ffff888016575380: fc fc fc fc fa fb fb fb fb fb fb fb fb fb fb fb [ 28.956710] ffff888016575400: fb fb fb fb fb fb fb fb fb fc fc fc fc fc fc fc [ 28.957561] ================================================================== [ 28.958949] Disabling lock debugging due to kernel taint [ 30.964593] BUG: Bad rss-counter state mm:000000002cdc440a type:MM_FILEPAGES val:33 [ 30.965756] BUG: Bad rss-counter state mm:000000002cdc440a type:MM_ANONPAGES val:22 [ 31.359371] BUG: Bad rss-counter state mm:000000009d954e9e type:MM_FILEPAGES val:33 [ 31.361190] BUG: Bad rss-counter state mm:000000009d954e9e type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:13530' (ECDSA) to the list of known hosts. 2023/06/21 06:12:41 fuzzer started 2023/06/21 06:12:41 dialing manager at localhost:36067 2023/06/21 06:12:41 checking machine... 2023/06/21 06:12:41 checking revisions... [ 32.106579] kmemleak: Automatic memory scanning thread ended 2023/06/21 06:12:41 testing simple program... [ 32.160279] cgroup: Unknown subsys name 'net' [ 32.202496] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 06:12:41 Registers: info registers vcpu 0 RAX=1ffffffff0bbfc31 RBX=ffffffff85dfe188 RCX=ffffffff8180ce88 RDX=0000000000000000 RSI=ffffffff86139066 RDI=ffffffff85dfe158 RBP=ffffffff85dfe188 RSP=ffff888016fd7820 R8 =ffffffff86139066 R9 =ffff888016fd7918 R10=0000000000038001 R11=0000000000020de5 R12=ffffffff85dfe18c R13=ffffffff85dfe158 R14=ffffffff85dfe184 R15=dffffc0000000000 RIP=ffffffff8112fc7f RFL=00000212 [----A--] 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 00007fc411b43900 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=00007fc4120fa618 CR3=000000000eece000 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=ffff88806cf0a001 RBX=0000000000000002 RCX=0000000000000002 RDX=ffff88806cf0a001 RSI=ffff88806cf09ff8 RDI=ffff88806cf09aa8 RBP=ffff88806cf09ff8 RSP=ffff88806cf09a00 R8 =ffffffff864b2f42 R9 =ffff88806cf09ad8 R10=0000000000038001 R11=00000000000b5305 R12=0000000000000008 R13=ffff88806cf02000 R14=ffff88806cf09ff8 R15=ffff88806cf09a98 RIP=ffffffff811304ce RFL=00000282 [--S----] 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=00007f5acb1903e0 CR3=000000000c70c000 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=a77c51a4c65bf5905a4b5d30a593ab40 XMM02=000000000011d768eff9b2d0a8fce9cb XMM03=000000000011d8382c67c8bc2e329bc3 XMM04=96555a5476c4cbf000000000000ae988 XMM05=e4cb8bb95a7664b60000000000131c60 XMM06=113a90bb216ee8980000000000130ac8 XMM07=e042d86d42eb936e0000000000122120 XMM08=1a996f6f46caaeeb000000000011d838 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000