syzkaller login: [ 38.895441] BUG: Bad rss-counter state mm:00000000a17a4c0f type:MM_FILEPAGES val:33 [ 38.896121] BUG: Bad rss-counter state mm:00000000a17a4c0f type:MM_ANONPAGES val:22 [ 38.926874] ================================================================== [ 38.927496] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 38.928139] Read of size 8 at addr ffff888016a80c20 by task sshd/220 [ 38.928791] [ 38.928940] CPU: 0 PID: 220 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 38.929546] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 38.930217] Call Trace: [ 38.930446] [ 38.930654] dump_stack_lvl+0x91/0xf0 [ 38.930971] print_report+0xcc/0x620 [ 38.931284] ? __virt_addr_valid+0x102/0x340 [ 38.931637] ? vma_interval_tree_remove+0xc75/0xec0 [ 38.932025] ? vma_interval_tree_remove+0xc75/0xec0 [ 38.932411] kasan_report+0xbe/0xf0 [ 38.932716] ? vma_interval_tree_remove+0xc75/0xec0 [ 38.933146] vma_interval_tree_remove+0xc75/0xec0 [ 38.933548] vma_prepare+0xc54/0x11a0 [ 38.933846] __split_vma+0x5af/0x950 [ 38.934171] ? __pfx___split_vma+0x10/0x10 [ 38.934555] ? find_held_lock+0x2c/0x110 [ 38.934897] do_vmi_align_munmap+0x2ba/0x11f0 [ 38.935278] ? lock_is_held_type+0x9f/0x120 [ 38.935649] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 38.936056] ? mtree_range_walk+0x632/0x900 [ 38.936433] ? mas_walk+0x5c7/0x7c0 [ 38.936738] do_vmi_munmap+0x1f1/0x2b0 [ 38.937671] mmap_region+0x1f9/0x2660 [ 38.938520] ? vm_mmap_pgoff+0x15c/0x3a0 [ 38.939388] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 38.940064] ? __pfx_lock_acquire+0x10/0x10 [ 38.940412] ? __pfx_mmap_region+0x10/0x10 [ 38.940751] ? security_mmap_addr+0x7d/0xa0 [ 38.941117] ? get_unmapped_area+0x1f5/0x3f0 [ 38.941464] do_mmap+0x854/0xf00 [ 38.941741] vm_mmap_pgoff+0x1a6/0x3a0 [ 38.942067] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 38.942422] ksys_mmap_pgoff+0x3af/0x500 [ 38.942765] do_syscall_64+0x3f/0x90 [ 38.943099] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 38.943526] RIP: 0033:0x7f10c1f17d82 [ 38.943824] 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 [ 38.945225] RSP: 002b:00007ffca8ff50b8 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 38.945810] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f10c1f17d82 [ 38.946356] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f10c1351000 [ 38.946916] RBP: 00007f10c1351000 R08: 0000000000000009 R09: 0000000000001000 [ 38.947501] R10: 0000000000000812 R11: 0000000000000206 R12: 0000560c20780ec0 [ 38.948066] R13: 00007ffca8ff50d0 R14: 00007ffca8ff5100 R15: 00007ffca8ff5460 [ 38.948619] [ 38.948815] [ 38.948954] Allocated by task 213: [ 38.949280] kasan_save_stack+0x22/0x50 [ 38.949612] kasan_set_track+0x25/0x30 [ 38.949923] __kasan_slab_alloc+0x59/0x70 [ 38.950258] kmem_cache_alloc+0x16b/0x370 [ 38.950586] vm_area_dup+0x20/0x160 [ 38.950882] __split_vma+0x170/0x950 [ 38.951201] split_vma+0xc6/0x110 [ 38.951497] mprotect_fixup+0x8d2/0xb30 [ 38.951816] do_mprotect_pkey+0x87e/0xd40 [ 38.952143] __x64_sys_mprotect+0x78/0xc0 [ 38.952487] do_syscall_64+0x3f/0x90 [ 38.952813] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 38.953276] [ 38.953419] Freed by task 213: [ 38.953675] kasan_save_stack+0x22/0x50 [ 38.953999] kasan_set_track+0x25/0x30 [ 38.954323] kasan_save_free_info+0x2b/0x50 [ 38.954678] __kasan_slab_free+0x10a/0x190 [ 38.955042] kmem_cache_free+0x10d/0x4d0 [ 38.955387] rcu_core+0x8c8/0x2860 [ 38.955699] __do_softirq+0x1b7/0x7d4 [ 38.956030] [ 38.956180] Last potentially related work creation: [ 38.956574] kasan_save_stack+0x22/0x50 [ 38.956924] __kasan_record_aux_stack+0x8e/0xa0 [ 38.957385] __call_rcu_common.constprop.0+0x6a/0xb90 [ 38.957865] remove_vma+0x139/0x170 [ 38.958189] do_vmi_align_munmap+0xd4a/0x11f0 [ 38.958568] do_vmi_munmap+0x1f1/0x2b0 [ 38.958879] __vm_munmap+0x138/0x3a0 [ 38.959175] __x64_sys_munmap+0x59/0x80 [ 38.959507] do_syscall_64+0x3f/0x90 [ 38.959839] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 38.960329] [ 38.960491] The buggy address belongs to the object at ffff888016a80bc8 [ 38.960491] which belongs to the cache vm_area_struct of size 168 [ 38.961546] The buggy address is located 88 bytes inside of [ 38.961546] freed 168-byte region [ffff888016a80bc8, ffff888016a80c70) [ 38.962646] [ 38.962806] The buggy address belongs to the physical page: [ 38.963282] page:00000000cfb4e409 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x16a80 [ 38.964015] memcg:ffff888016741101 [ 38.964317] flags: 0x100000000000200(slab|node=0|zone=1) [ 38.964779] page_type: 0xffffffff() [ 38.965181] raw: 0100000000000200 ffff88800879fc80 dead000000000122 0000000000000000 [ 38.965843] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff888016741101 [ 38.966503] page dumped because: kasan: bad access detected [ 38.966941] [ 38.967083] Memory state around the buggy address: [ 38.967471] ffff888016a80b00: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 38.968041] ffff888016a80b80: 00 fc fc fc fc fc fc fc fc fa fb fb fb fb fb fb [ 38.968634] >ffff888016a80c00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fc fc [ 38.969288] ^ [ 38.969675] ffff888016a80c80: fc fc fc fc fc fc fa fb fb fb fb fb fb fb fb fb [ 38.970267] ffff888016a80d00: fb fb fb fb fb fb fb fb fb fb fb fc fc fc fc fc [ 38.970854] ================================================================== [ 38.971681] Disabling lock debugging due to kernel taint [ 40.547179] BUG: Bad rss-counter state mm:00000000f4cc8b8e type:MM_FILEPAGES val:33 [ 40.547898] BUG: Bad rss-counter state mm:00000000f4cc8b8e type:MM_ANONPAGES val:22 [ 40.893382] BUG: Bad rss-counter state mm:000000005c5b5fd5 type:MM_FILEPAGES val:33 [ 40.894048] BUG: Bad rss-counter state mm:000000005c5b5fd5 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:14872' (ECDSA) to the list of known hosts. 2023/06/20 09:36:07 fuzzer started 2023/06/20 09:36:07 dialing manager at localhost:44161 2023/06/20 09:36:07 checking machine... 2023/06/20 09:36:07 checking revisions... [ 41.434079] kmemleak: Automatic memory scanning thread ended 2023/06/20 09:36:07 testing simple program... [ 41.464436] cgroup: Unknown subsys name 'net' [ 41.510887] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 09:36:00 Registers: info registers vcpu 0 RAX=0000000000000000 RBX=000000000000006e RCX=0000000000000000 RDX=ffff88800e813680 RSI=ffffffff8217c4cb RDI=ffffffff85d3bed0 RBP=ffff888016b1fe30 RSP=ffff888016b1fda8 R8 =0000000000000000 R9 =fffffbfff0ba77da R10=ffffffff85d3bed7 R11=0000000000000000 R12=00007fc9592118a0 R13=ffff888016b1fe30 R14=000000000000006e R15=0000000000000000 RIP=ffffffff82245764 RFL=00000293 [--S-A-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 00007fc958c5b900 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=00007fc959210650 CR3=000000001ca64000 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=000000000000000000000000000000ff XMM02=000000000000000000000000000000ff XMM03=5320444f4854454d5f54505952434e45 XMM04=40404040404040404040404040404040 XMM05=5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a XMM06=20202020202020202020202020202020 XMM07=00000000000000000000000000000000 XMM08=ffbc64ffffbc44ffffbc34ffffbc9f00 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=00007ffeb3f36be8 CR3=000000000c73a000 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=2037303a36333a3930203032206e754a XMM01=73732878696e755f6d6170203a5d3932 XMM02=65736f6c63206e6f6973736573203a29 XMM03=755f6d6170203a5d3932325b64687373 XMM04=69662068637573206f4e203a656c6163 XMM05=3a656c696620766e65206e65706f206f XMM06=65733a6468737328766e655f6d617020 XMM07=6b7a79732037303a36333a3930203032 XMM08=3d656e696c646d632022656369767265 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000