syzkaller login: [ 38.760472] BUG: Bad rss-counter state mm:00000000022dc9bb type:MM_FILEPAGES val:33 [ 38.761705] BUG: Bad rss-counter state mm:00000000022dc9bb type:MM_ANONPAGES val:22 [ 38.915469] ================================================================== [ 38.916614] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 38.917551] Read of size 8 at addr ffff88800c9b0c20 by task sshd/225 [ 38.918471] [ 38.918692] CPU: 1 PID: 225 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 38.919556] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 38.920547] Call Trace: [ 38.920876] <TASK> [ 38.921165] dump_stack_lvl+0x91/0xf0 [ 38.921655] print_report+0xcc/0x620 [ 38.922141] ? __virt_addr_valid+0x102/0x340 [ 38.922693] ? vma_interval_tree_remove+0xc75/0xec0 [ 38.923318] ? vma_interval_tree_remove+0xc75/0xec0 [ 38.923954] kasan_report+0xbe/0xf0 [ 38.924434] ? vma_interval_tree_remove+0xc75/0xec0 [ 38.925062] vma_interval_tree_remove+0xc75/0xec0 [ 38.925670] vma_prepare+0xc54/0x11a0 [ 38.926157] __split_vma+0x5af/0x950 [ 38.926627] ? __pfx___split_vma+0x10/0x10 [ 38.927154] ? find_held_lock+0x2c/0x110 [ 38.927691] do_vmi_align_munmap+0x2ba/0x11f0 [ 38.928259] ? lock_is_held_type+0x9f/0x120 [ 38.928806] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 38.929422] ? mtree_range_walk+0x632/0x900 [ 38.929975] ? mas_walk+0x5c7/0x7c0 [ 38.930456] do_vmi_munmap+0x1f1/0x2b0 [ 38.930947] mmap_region+0x1f9/0x2660 [ 38.931425] ? vm_mmap_pgoff+0x15c/0x3a0 [ 38.931959] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 38.932676] ? __pfx_lock_acquire+0x10/0x10 [ 38.933208] ? __pfx_mmap_region+0x10/0x10 [ 38.933745] ? security_mmap_addr+0x7d/0xa0 [ 38.934275] ? get_unmapped_area+0x1f5/0x3f0 [ 38.934827] do_mmap+0x854/0xf00 [ 38.935281] vm_mmap_pgoff+0x1a6/0x3a0 [ 38.935803] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 38.936370] ksys_mmap_pgoff+0x3af/0x500 [ 38.936877] do_syscall_64+0x3f/0x90 [ 38.937367] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 38.938014] RIP: 0033:0x7f09498f1d82 [ 38.938472] 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 [ 38.940635] RSP: 002b:00007fffef67b898 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 38.941547] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f09498f1d82 [ 38.942406] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f0948d2b000 [ 38.943277] RBP: 00007f0948d2b000 R08: 0000000000000009 R09: 0000000000001000 [ 38.944136] R10: 0000000000000812 R11: 0000000000000206 R12: 000055cb23a09ec0 [ 38.944994] R13: 00007fffef67b8b0 R14: 00007fffef67b8e0 R15: 00007fffef67bc40 [ 38.945854] </TASK> [ 38.946149] [ 38.946364] Allocated by task 218: [ 38.946801] kasan_save_stack+0x22/0x50 [ 38.947320] kasan_set_track+0x25/0x30 [ 38.947846] __kasan_slab_alloc+0x59/0x70 [ 38.948432] kmem_cache_alloc+0x16b/0x370 [ 38.948966] vm_area_dup+0x20/0x160 [ 38.949421] __split_vma+0x170/0x950 [ 38.949904] split_vma+0xc6/0x110 [ 38.950361] mprotect_fixup+0x8d2/0xb30 [ 38.950875] do_mprotect_pkey+0x87e/0xd40 [ 38.951409] __x64_sys_mprotect+0x78/0xc0 [ 38.951948] do_syscall_64+0x3f/0x90 [ 38.952430] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 38.953090] [ 38.953308] Freed by task 218: [ 38.953706] kasan_save_stack+0x22/0x50 [ 38.954211] kasan_set_track+0x25/0x30 [ 38.954711] kasan_save_free_info+0x2b/0x50 [ 38.955257] __kasan_slab_free+0x10a/0x190 [ 38.955800] kmem_cache_free+0x10d/0x4d0 [ 38.956321] rcu_core+0x8c8/0x2860 [ 38.956765] __do_softirq+0x1b7/0x7d4 [ 38.957249] [ 38.957473] Last potentially related work creation: [ 38.958069] kasan_save_stack+0x22/0x50 [ 38.958578] __kasan_record_aux_stack+0x8e/0xa0 [ 38.959151] __call_rcu_common.constprop.0+0x6a/0xb90 [ 38.959854] remove_vma+0x139/0x170 [ 38.960325] do_vmi_align_munmap+0xd4a/0x11f0 [ 38.960878] do_vmi_munmap+0x1f1/0x2b0 [ 38.961361] __vm_munmap+0x138/0x3a0 [ 38.961830] __x64_sys_munmap+0x59/0x80 [ 38.962332] do_syscall_64+0x3f/0x90 [ 38.962809] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 38.963448] [ 38.963670] The buggy address belongs to the object at ffff88800c9b0bc8 [ 38.963670] which belongs to the cache vm_area_struct of size 168 [ 38.965213] The buggy address is located 88 bytes inside of [ 38.965213] freed 168-byte region [ffff88800c9b0bc8, ffff88800c9b0c70) [ 38.966634] [ 38.966854] The buggy address belongs to the physical page: [ 38.967525] page:000000009d74d790 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xc9b0 [ 38.968637] memcg:ffff88800f1e6001 [ 38.969066] flags: 0x100000000000200(slab|node=0|zone=1) [ 38.969715] page_type: 0xffffffff() [ 38.970253] raw: 0100000000000200 ffff8880087a0c80 dead000000000122 0000000000000000 [ 38.971327] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800f1e6001 [ 38.972409] page dumped because: kasan: bad access detected [ 38.973187] [ 38.973439] Memory state around the buggy address: [ 38.974133] ffff88800c9b0b00: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 38.975143] ffff88800c9b0b80: 00 fc fc fc fc fc fc fc fc fa fb fb fb fb fb fb [ 38.976166] >ffff88800c9b0c00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fc fc [ 38.977183] ^ [ 38.977824] ffff88800c9b0c80: fc fc fc fc fc fc fa fb fb fb fb fb fb fb fb fb [ 38.978870] ffff88800c9b0d00: fb fb fb fb fb fb fb fb fb fb fb fc fc fc fc fc [ 38.979906] ================================================================== [ 38.981332] Disabling lock debugging due to kernel taint [ 41.323018] BUG: Bad rss-counter state mm:00000000fde23d61 type:MM_FILEPAGES val:33 [ 41.324058] BUG: Bad rss-counter state mm:00000000fde23d61 type:MM_ANONPAGES val:22 [ 41.818147] BUG: Bad rss-counter state mm:00000000ad41cc56 type:MM_FILEPAGES val:33 [ 41.819305] BUG: Bad rss-counter state mm:00000000ad41cc56 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:51063' (ECDSA) to the list of known hosts. 2023/06/20 23:57:57 fuzzer started 2023/06/20 23:57:57 dialing manager at localhost:36067 2023/06/20 23:57:57 checking machine... 2023/06/20 23:57:57 checking revisions... [ 42.494217] kmemleak: Automatic memory scanning thread ended 2023/06/20 23:57:57 testing simple program... [ 42.533553] cgroup: Unknown subsys name 'net' [ 42.574678] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 23:57:57 Registers: info registers vcpu 0 RAX=dffffc0000000000 RBX=ffffffff813ad470 RCX=0000000000000001 RDX=ffff88800edff3e8 RSI=ffffffff8366a63c RDI=ffff88800edff3e8 RBP=ffff88800edff480 RSP=ffff88800edff3d0 R8 =0000000000000001 R9 =ffff88800edff428 R10=0000000000038001 R11=0000000000020c57 R12=ffff88800edff4b0 R13=0000000000000000 R14=ffff888015b89b40 R15=ffff88800edff3e8 RIP=ffffffff811305e8 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 00007f57b73d1900 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=00007fff9d7eb000 CR3=0000000009658000 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=635f6e6f69737365733a4d41503d706f XMM01=6f6c5f6d61702c78756e696c65735f6d XMM02=61702c74696d7265705f6d61702c7469 XMM03=655f6d61702c7374696d696c5f6d6170 XMM04=3d6c616e696d72657420322e322e302e XMM05=3d656d616e74736f682022646873732f XMM06=746f6f72223d746363612078756e696c XMM07=6e655f6d61702c7374696d696c5f6d61 XMM08=652075253d64692073253d706f000000 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=ffff88806cf35000 RBX=0000000000000001 RCX=ffffffff8451250e RDX=ffffed100d9e6a01 RSI=0000000000000004 RDI=ffffffff81288ac5 RBP=dffffc0000000000 RSP=ffff888008e07e70 R8 =0000000000000000 R9 =ffffed100d9e6a00 R10=ffff88806cf35003 R11=ffff888008c04400 R12=ffffffff85d3d350 R13=1ffff110011c0fd3 R14=0000000000000000 R15=0000000000000000 RIP=ffffffff8451349f 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=00007f87c22a6000 CR3=000000000f60e000 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=699577299b277d903044ee52b14a0452 XMM02=000000000011b930ec2efd57dc4c00df XMM03=0000000000121b58834ffc47c7268205 XMM04=99abcf588326861a00000000000ae988 XMM05=1bf608671767a35d0000000000131e38 XMM06=ae9b264101391a5b00000000001315a8 XMM07=e042d86d42eb936e0000000000121dd8 XMM08=834ffc47c7268205000000000011b990 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000