syzkaller login: [ 32.061517] BUG: Bad rss-counter state mm:00000000c1bea527 type:MM_FILEPAGES val:33 [ 32.062824] BUG: Bad rss-counter state mm:00000000c1bea527 type:MM_ANONPAGES val:22 [ 32.235923] ================================================================== [ 32.236840] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 32.237792] Read of size 8 at addr ffff88800eeeda50 by task sshd/219 [ 32.238587] [ 32.238921] CPU: 0 PID: 219 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 32.239785] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 32.240749] Call Trace: [ 32.241236] [ 32.241590] dump_stack_lvl+0x91/0xf0 [ 32.242198] print_report+0xcc/0x620 [ 32.242783] ? __virt_addr_valid+0x102/0x340 [ 32.243451] ? vma_interval_tree_remove+0xc75/0xec0 [ 32.244196] ? vma_interval_tree_remove+0xc75/0xec0 [ 32.244944] kasan_report+0xbe/0xf0 [ 32.245523] ? vma_interval_tree_remove+0xc75/0xec0 [ 32.246286] vma_interval_tree_remove+0xc75/0xec0 [ 32.247019] vma_prepare+0xc54/0x11a0 [ 32.247601] __split_vma+0x5af/0x950 [ 32.248174] ? __pfx___split_vma+0x10/0x10 [ 32.248816] ? find_held_lock+0x2c/0x110 [ 32.249439] do_vmi_align_munmap+0x2ba/0x11f0 [ 32.250230] ? lock_is_held_type+0x9f/0x120 [ 32.250792] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 32.251389] ? mtree_range_walk+0x632/0x900 [ 32.251940] ? mas_walk+0x5c7/0x7c0 [ 32.252410] do_vmi_munmap+0x1f1/0x2b0 [ 32.252900] mmap_region+0x1f9/0x2660 [ 32.253377] ? vm_mmap_pgoff+0x15c/0x3a0 [ 32.253896] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 32.254604] ? __pfx_lock_acquire+0x10/0x10 [ 32.255132] ? __pfx_mmap_region+0x10/0x10 [ 32.255663] ? security_mmap_addr+0x7d/0xa0 [ 32.256187] ? get_unmapped_area+0x1f5/0x3f0 [ 32.256732] do_mmap+0x854/0xf00 [ 32.257167] vm_mmap_pgoff+0x1a6/0x3a0 [ 32.257657] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 32.258218] ksys_mmap_pgoff+0x3af/0x500 [ 32.258723] do_syscall_64+0x3f/0x90 [ 32.259196] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 32.259833] RIP: 0033:0x7fdf01380d82 [ 32.260284] 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 [ 32.262407] RSP: 002b:00007ffc80d98b38 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 32.263302] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007fdf01380d82 [ 32.264149] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007fdf007ba000 [ 32.264989] RBP: 00007fdf007ba000 R08: 0000000000000009 R09: 0000000000001000 [ 32.265839] R10: 0000000000000812 R11: 0000000000000206 R12: 000055db97be8ec0 [ 32.266686] R13: 00007ffc80d98b50 R14: 00007ffc80d98b80 R15: 00007ffc80d98ee0 [ 32.267552] [ 32.267842] [ 32.268055] Allocated by task 212: [ 32.268482] kasan_save_stack+0x22/0x50 [ 32.268984] kasan_set_track+0x25/0x30 [ 32.269471] __kasan_slab_alloc+0x59/0x70 [ 32.270007] kmem_cache_alloc+0x16b/0x370 [ 32.270516] vm_area_dup+0x20/0x160 [ 32.270972] __split_vma+0x170/0x950 [ 32.271435] split_vma+0xc6/0x110 [ 32.271869] mprotect_fixup+0x8d2/0xb30 [ 32.272363] do_mprotect_pkey+0x87e/0xd40 [ 32.272877] __x64_sys_mprotect+0x78/0xc0 [ 32.273393] do_syscall_64+0x3f/0x90 [ 32.273870] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 32.274517] [ 32.274729] Freed by task 212: [ 32.275115] kasan_save_stack+0x22/0x50 [ 32.275621] kasan_set_track+0x25/0x30 [ 32.276110] kasan_save_free_info+0x2b/0x50 [ 32.276640] __kasan_slab_free+0x10a/0x190 [ 32.277169] kmem_cache_free+0x10d/0x4d0 [ 32.277677] rcu_core+0x8c8/0x2860 [ 32.278134] __do_softirq+0x1b7/0x7d4 [ 32.278603] [ 32.278816] Last potentially related work creation: [ 32.279394] kasan_save_stack+0x22/0x50 [ 32.279894] __kasan_record_aux_stack+0x8e/0xa0 [ 32.280465] __call_rcu_common.constprop.0+0x6a/0xb90 [ 32.281104] remove_vma+0x139/0x170 [ 32.281557] do_vmi_align_munmap+0xd4a/0x11f0 [ 32.282116] do_vmi_munmap+0x1f1/0x2b0 [ 32.282596] __vm_munmap+0x138/0x3a0 [ 32.283061] __x64_sys_munmap+0x59/0x80 [ 32.283556] do_syscall_64+0x3f/0x90 [ 32.284026] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 32.284664] [ 32.284878] The buggy address belongs to the object at ffff88800eeed9f8 [ 32.284878] which belongs to the cache vm_area_struct of size 168 [ 32.286331] The buggy address is located 88 bytes inside of [ 32.286331] freed 168-byte region [ffff88800eeed9f8, ffff88800eeedaa0) [ 32.287726] [ 32.287939] The buggy address belongs to the physical page: [ 32.288592] page:00000000da3a3e08 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xeeed [ 32.289664] memcg:ffff88800ec91101 [ 32.290101] anon flags: 0x100000000000200(slab|node=0|zone=1) [ 32.290791] page_type: 0xffffffff() [ 32.291243] raw: 0100000000000200 ffff88800879fc80 ffffea0000384280 dead000000000005 [ 32.292157] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800ec91101 [ 32.293063] page dumped because: kasan: bad access detected [ 32.293724] [ 32.293947] Memory state around the buggy address: [ 32.294525] ffff88800eeed900: fc fc 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 32.295372] ffff88800eeed980: 00 00 00 00 00 00 00 fc fc fc fc fc fc fc fc fa [ 32.296220] >ffff88800eeeda00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 32.297069] ^ [ 32.297761] ffff88800eeeda80: fb fb fb fb fc fc fc fc fc fc fc fc 00 00 00 00 [ 32.298622] ffff88800eeedb00: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 32.299470] ================================================================== [ 32.300477] Disabling lock debugging due to kernel taint [ 34.253786] BUG: Bad rss-counter state mm:00000000c8a8c617 type:MM_FILEPAGES val:33 [ 34.254975] BUG: Bad rss-counter state mm:00000000c8a8c617 type:MM_ANONPAGES val:22 [ 34.710473] BUG: Bad rss-counter state mm:00000000699edaf0 type:MM_FILEPAGES val:33 [ 34.711469] BUG: Bad rss-counter state mm:00000000699edaf0 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:56533' (ECDSA) to the list of known hosts. 2023/06/19 16:13:31 fuzzer started 2023/06/19 16:13:31 dialing manager at localhost:44161 2023/06/19 16:13:31 checking machine... 2023/06/19 16:13:31 checking revisions... [ 35.435754] kmemleak: Automatic memory scanning thread ended 2023/06/19 16:13:31 testing simple program... [ 35.478640] cgroup: Unknown subsys name 'net' [ 35.515127] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 16:13:29 Registers: info registers vcpu 0 RAX=0000000000000000 RBX=0000000000000dc0 RCX=ffff88806c4b8088 RDX=0000000000000000 RSI=ffffffff846000aa RDI=0000000000000000 RBP=ffff888008442000 RSP=ffff888010277cd8 R8 =000000005b8c4057 R9 =fffffbfff0ba77da R10=ffffffff85d3bed7 R11=00000000000b6996 R12=0000000000000718 R13=ffff88801583f000 R14=ffffffff83646a97 R15=0000000000000001 RIP=ffffffff8135b8e5 RFL=00000283 [--S---C] 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 00007fa32cdc3900 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=00007ffe86726000 CR3=000000000e38e000 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=ffffffffffffffffffff000000000000 XMM01=000000000000003635006b6f6c6c756e XMM02=62003d73646e756f7200323135616873 XMM03=5320444f4854454d5f54505952434e45 XMM04=40404040404040404040404040404040 XMM05=5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a XMM06=20202020202020202020202020202020 XMM07=00000000000000000000000000000000 XMM08=00000000000000000000000000202020 XMM09=ff0000ffffffffffff00000000ffffff 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=00007fbefe6a36f0 CR3=000000000ca08000 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=3c0cbdc936ee4bae7543aed834a0da03 XMM02=000000000011c960ec2efd57dc4c00df XMM03=00000000001242a87bb2ad466d31cf81 XMM04=5273525b6494b89f00000000000ae988 XMM05=dfcdbad4f1609c370000000000133e50 XMM06=d8fd405ed2a6e80b0000000000132cb8 XMM07=e042d86d42eb936e0000000000124528 XMM08=7bb2ad466d31cf81000000000011c9c0 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000