syzkaller login: [ 43.244022] BUG: Bad rss-counter state mm:00000000e97c4404 type:MM_FILEPAGES val:33 [ 43.245557] BUG: Bad rss-counter state mm:00000000e97c4404 type:MM_ANONPAGES val:22 [ 43.415636] ================================================================== [ 43.416858] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 43.418099] Read of size 8 at addr ffff88800e6ff6b0 by task sshd/219 [ 43.419115] [ 43.419401] CPU: 0 PID: 219 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 43.420535] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 43.421820] Call Trace: [ 43.422244] [ 43.422617] dump_stack_lvl+0x91/0xf0 [ 43.423260] print_report+0xcc/0x620 [ 43.423902] ? __virt_addr_valid+0x102/0x340 [ 43.424626] ? vma_interval_tree_remove+0xc75/0xec0 [ 43.425456] ? vma_interval_tree_remove+0xc75/0xec0 [ 43.426199] kasan_report+0xbe/0xf0 [ 43.426676] ? vma_interval_tree_remove+0xc75/0xec0 [ 43.427309] vma_interval_tree_remove+0xc75/0xec0 [ 43.427917] vma_prepare+0xc54/0x11a0 [ 43.428396] __split_vma+0x5af/0x950 [ 43.428872] ? __pfx___split_vma+0x10/0x10 [ 43.429397] ? find_held_lock+0x2c/0x110 [ 43.429947] do_vmi_align_munmap+0x2ba/0x11f0 [ 43.430505] ? lock_is_held_type+0x9f/0x120 [ 43.431048] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 43.431659] ? mtree_range_walk+0x632/0x900 [ 43.432219] ? mas_walk+0x5c7/0x7c0 [ 43.432691] do_vmi_munmap+0x1f1/0x2b0 [ 43.433186] mmap_region+0x1f9/0x2660 [ 43.433675] ? vm_mmap_pgoff+0x15c/0x3a0 [ 43.434189] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 43.434903] ? __pfx_lock_acquire+0x10/0x10 [ 43.435441] ? __pfx_mmap_region+0x10/0x10 [ 43.435981] ? security_mmap_addr+0x7d/0xa0 [ 43.436515] ? get_unmapped_area+0x1f5/0x3f0 [ 43.437063] do_mmap+0x854/0xf00 [ 43.437497] vm_mmap_pgoff+0x1a6/0x3a0 [ 43.438007] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 43.438568] ksys_mmap_pgoff+0x3af/0x500 [ 43.439083] do_syscall_64+0x3f/0x90 [ 43.439558] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 43.440205] RIP: 0033:0x7f1b325b6d82 [ 43.440664] 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 [ 43.442809] RSP: 002b:00007fff7f7be288 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 43.443705] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f1b325b6d82 [ 43.444552] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f1b319f0000 [ 43.445387] RBP: 00007f1b319f0000 R08: 0000000000000009 R09: 0000000000001000 [ 43.446243] R10: 0000000000000812 R11: 0000000000000206 R12: 000055bcb9721f70 [ 43.447090] R13: 00007fff7f7be2a0 R14: 00007fff7f7be2d0 R15: 00007fff7f7be630 [ 43.447943] [ 43.448233] [ 43.448450] Allocated by task 212: [ 43.448877] kasan_save_stack+0x22/0x50 [ 43.449390] kasan_set_track+0x25/0x30 [ 43.449896] __kasan_slab_alloc+0x59/0x70 [ 43.450422] kmem_cache_alloc+0x16b/0x370 [ 43.450941] vm_area_dup+0x20/0x160 [ 43.451395] __split_vma+0x170/0x950 [ 43.451856] split_vma+0xc6/0x110 [ 43.452297] mprotect_fixup+0x8d2/0xb30 [ 43.452802] do_mprotect_pkey+0x87e/0xd40 [ 43.453317] __x64_sys_mprotect+0x78/0xc0 [ 43.453842] do_syscall_64+0x3f/0x90 [ 43.454321] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 43.454969] [ 43.455186] Freed by task 212: [ 43.455577] kasan_save_stack+0x22/0x50 [ 43.456078] kasan_set_track+0x25/0x30 [ 43.456568] kasan_save_free_info+0x2b/0x50 [ 43.457104] __kasan_slab_free+0x10a/0x190 [ 43.457636] kmem_cache_free+0x10d/0x4d0 [ 43.458166] rcu_core+0x8c8/0x2860 [ 43.458615] __do_softirq+0x1b7/0x7d4 [ 43.459089] [ 43.459303] Last potentially related work creation: [ 43.459883] kasan_save_stack+0x22/0x50 [ 43.460395] __kasan_record_aux_stack+0x8e/0xa0 [ 43.460979] __call_rcu_common.constprop.0+0x6a/0xb90 [ 43.461636] remove_vma+0x139/0x170 [ 43.462109] do_vmi_align_munmap+0xd4a/0x11f0 [ 43.462688] do_vmi_munmap+0x1f1/0x2b0 [ 43.463172] __vm_munmap+0x138/0x3a0 [ 43.463651] __x64_sys_munmap+0x59/0x80 [ 43.464149] do_syscall_64+0x3f/0x90 [ 43.464638] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 43.465279] [ 43.465496] Second to last potentially related work creation: [ 43.466203] kasan_save_stack+0x22/0x50 [ 43.466714] __kasan_record_aux_stack+0x8e/0xa0 [ 43.467287] __call_rcu_common.constprop.0+0x6a/0xb90 [ 43.467932] remove_vma+0x139/0x170 [ 43.468382] do_vmi_align_munmap+0xd4a/0x11f0 [ 43.468941] do_vmi_munmap+0x1f1/0x2b0 [ 43.469436] mmap_region+0x1f9/0x2660 [ 43.469928] do_mmap+0x854/0xf00 [ 43.470364] vm_mmap_pgoff+0x1a6/0x3a0 [ 43.470859] ksys_mmap_pgoff+0x3af/0x500 [ 43.471365] do_syscall_64+0x3f/0x90 [ 43.471841] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 43.472477] [ 43.472698] The buggy address belongs to the object at ffff88800e6ff658 [ 43.472698] which belongs to the cache vm_area_struct of size 168 [ 43.474169] The buggy address is located 88 bytes inside of [ 43.474169] freed 168-byte region [ffff88800e6ff658, ffff88800e6ff700) [ 43.475563] [ 43.475782] The buggy address belongs to the physical page: [ 43.476439] page:00000000eb514242 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xe6ff [ 43.477517] memcg:ffff88800e63a701 [ 43.477956] flags: 0x100000000000200(slab|node=0|zone=1) [ 43.478594] page_type: 0xffffffff() [ 43.479057] raw: 0100000000000200 ffff88800879fc80 ffffea00003990c0 dead000000000002 [ 43.479984] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800e63a701 [ 43.480891] page dumped because: kasan: bad access detected [ 43.481560] [ 43.481779] Memory state around the buggy address: [ 43.482370] ffff88800e6ff580: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 43.483229] ffff88800e6ff600: 00 00 00 fc fc fc fc fc fc fc fc fa fb fb fb fb [ 43.484083] >ffff88800e6ff680: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 43.484926] ^ [ 43.485508] ffff88800e6ff700: fc fc fc fc fc fc fc fc 00 00 00 00 00 00 00 00 [ 43.486388] ffff88800e6ff780: 00 00 00 00 00 00 00 00 00 00 00 00 00 fc fc fc [ 43.487230] ================================================================== [ 43.488349] Disabling lock debugging due to kernel taint [ 45.324910] BUG: Bad rss-counter state mm:00000000dd6195b3 type:MM_FILEPAGES val:31 [ 45.325938] BUG: Bad rss-counter state mm:00000000dd6195b3 type:MM_ANONPAGES val:22 [ 45.852356] BUG: Bad rss-counter state mm:000000007a2c515c type:MM_FILEPAGES val:33 [ 45.853344] BUG: Bad rss-counter state mm:000000007a2c515c type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:8834' (ECDSA) to the list of known hosts. 2023/06/20 04:21:40 fuzzer started 2023/06/20 04:21:40 dialing manager at localhost:44161 2023/06/20 04:21:40 checking machine... 2023/06/20 04:21:40 checking revisions... [ 46.518752] kmemleak: Automatic memory scanning thread ended 2023/06/20 04:21:40 testing simple program... [ 46.564272] cgroup: Unknown subsys name 'net' [ 46.615195] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 04:21:35 Registers: info registers vcpu 0 RAX=0000000080000000 RBX=0000000000000002 RCX=ffffffff844f24ef RDX=0000000000000002 RSI=0000000000000002 RDI=0000000000000007 RBP=ffff888019597938 RSP=ffff8880195978a8 R8 =0000000000000007 R9 =0000000000000002 R10=0000000000000002 R11=0000000000000000 R12=ffff88801b078582 R13=dffffc0000000000 R14=1ffff110032b2f29 R15=ffff888019597938 RIP=ffffffff814c01d0 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 00007f1f5e5a1900 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=00007ffe80824000 CR3=000000000c5e8000 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=2c2c2c2c2c2c2c2c2c2c2c2c2c2c2c2c XMM01=00ff00000000000000000000000000ff XMM02=00ff00000000000000000000000000ff XMM03=655f6d61702c7374696d696c5f6d6170 XMM04=3d6c616e696d72657420322e322e302e XMM05=3d656d616e74736f682022646873732f XMM06=746f6f72223d746363612078756e696c XMM07=6e655f6d61702c7374696d696c5f6d61 XMM08=6500273d2720676e6974636570786500 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=ffff88806cf35000 RBX=0000000000000001 RCX=ffffffff8450c50e RDX=ffffed100d9e6a01 RSI=0000000000000004 RDI=ffffffff812889a5 RBP=dffffc0000000000 RSP=ffff888008e27e70 R8 =0000000000000000 R9 =ffffed100d9e6a00 R10=ffff88806cf35003 R11=0000000000000001 R12=ffffffff85d3bed0 R13=1ffff110011c4fd3 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 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=00007f348f04d4f0 CR3=000000000c4a0000 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=895faed80b84019fe14e36cde02f90fe XMM02=2c67c8bc2e329bc3000000000011d6a0 XMM03=fb795ef6d65770560000000000124040 XMM04=37bca0b8af35b3a600000000000ae988 XMM05=dfcdbad4f1609c370000000000134bb8 XMM06=a85967597e713e8a0000000000133d90 XMM07=e042d86d42eb936e0000000000124318 XMM08=7adcda0d1f37776e000000000011d700 XMM09=00000000000000000000000000000000 XMM10=20200000000020202020202020200000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000