syzkaller login: [ 38.716766] BUG: Bad rss-counter state mm:0000000095361973 type:MM_FILEPAGES val:33 [ 38.718007] BUG: Bad rss-counter state mm:0000000095361973 type:MM_ANONPAGES val:22 [ 38.759267] ================================================================== [ 38.759966] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 38.760690] Read of size 8 at addr ffff88800ee0a798 by task sshd/219 [ 38.761294] [ 38.761458] CPU: 1 PID: 219 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 38.762134] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 38.762890] Call Trace: [ 38.763296] [ 38.763541] dump_stack_lvl+0x91/0xf0 [ 38.763938] print_report+0xcc/0x620 [ 38.764221] ? __virt_addr_valid+0x102/0x340 [ 38.764528] ? vma_interval_tree_remove+0xc75/0xec0 [ 38.764884] ? vma_interval_tree_remove+0xc75/0xec0 [ 38.765228] kasan_report+0xbe/0xf0 [ 38.765506] ? vma_interval_tree_remove+0xc75/0xec0 [ 38.765869] vma_interval_tree_remove+0xc75/0xec0 [ 38.766220] vma_prepare+0xc54/0x11a0 [ 38.766492] __split_vma+0x5af/0x950 [ 38.766756] ? __pfx___split_vma+0x10/0x10 [ 38.767069] ? find_held_lock+0x2c/0x110 [ 38.767392] do_vmi_align_munmap+0x2ba/0x11f0 [ 38.767720] ? lock_is_held_type+0x9f/0x120 [ 38.768033] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 38.768382] ? mtree_range_walk+0x632/0x900 [ 38.768689] ? mas_walk+0x5c7/0x7c0 [ 38.768962] do_vmi_munmap+0x1f1/0x2b0 [ 38.769243] mmap_region+0x1f9/0x2660 [ 38.769517] ? vm_mmap_pgoff+0x15c/0x3a0 [ 38.769825] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 38.770234] ? __pfx_lock_acquire+0x10/0x10 [ 38.770534] ? __pfx_mmap_region+0x10/0x10 [ 38.770831] ? security_mmap_addr+0x7d/0xa0 [ 38.771130] ? get_unmapped_area+0x1f5/0x3f0 [ 38.771446] do_mmap+0x854/0xf00 [ 38.771690] vm_mmap_pgoff+0x1a6/0x3a0 [ 38.771967] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 38.772278] ksys_mmap_pgoff+0x3af/0x500 [ 38.772564] do_syscall_64+0x3f/0x90 [ 38.772851] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 38.773249] RIP: 0033:0x7f05ced4dd82 [ 38.773513] 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 [ 38.774773] RSP: 002b:00007ffc93648d68 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 38.775310] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f05ced4dd82 [ 38.775806] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f05ce187000 [ 38.776295] RBP: 00007f05ce187000 R08: 0000000000000009 R09: 0000000000001000 [ 38.776785] R10: 0000000000000812 R11: 0000000000000206 R12: 000055d2b4423f70 [ 38.777278] R13: 00007ffc93648d80 R14: 00007ffc93648db0 R15: 00007ffc93649110 [ 38.777772] [ 38.777948] [ 38.778066] Allocated by task 212: [ 38.778330] kasan_save_stack+0x22/0x50 [ 38.778613] kasan_set_track+0x25/0x30 [ 38.778905] __kasan_slab_alloc+0x59/0x70 [ 38.779205] kmem_cache_alloc+0x16b/0x370 [ 38.779505] vm_area_dup+0x20/0x160 [ 38.779775] __split_vma+0x170/0x950 [ 38.780053] split_vma+0xc6/0x110 [ 38.780307] mprotect_fixup+0x8d2/0xb30 [ 38.780594] do_mprotect_pkey+0x87e/0xd40 [ 38.780890] __x64_sys_mprotect+0x78/0xc0 [ 38.781177] do_syscall_64+0x3f/0x90 [ 38.781450] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 38.781814] [ 38.781936] Freed by task 212: [ 38.782158] kasan_save_stack+0x22/0x50 [ 38.782430] kasan_set_track+0x25/0x30 [ 38.782699] kasan_save_free_info+0x2b/0x50 [ 38.782985] __kasan_slab_free+0x10a/0x190 [ 38.783305] kmem_cache_free+0x10d/0x4d0 [ 38.783579] rcu_core+0x8c8/0x2860 [ 38.783824] __do_softirq+0x1b7/0x7d4 [ 38.784084] [ 38.784200] Last potentially related work creation: [ 38.784515] kasan_save_stack+0x22/0x50 [ 38.784790] __kasan_record_aux_stack+0x8e/0xa0 [ 38.785105] __call_rcu_common.constprop.0+0x6a/0xb90 [ 38.785457] remove_vma+0x139/0x170 [ 38.785701] do_vmi_align_munmap+0xd4a/0x11f0 [ 38.786004] do_vmi_munmap+0x1f1/0x2b0 [ 38.786271] __vm_munmap+0x138/0x3a0 [ 38.786525] __x64_sys_munmap+0x59/0x80 [ 38.786796] do_syscall_64+0x3f/0x90 [ 38.787055] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 38.787411] [ 38.787529] The buggy address belongs to the object at ffff88800ee0a740 [ 38.787529] which belongs to the cache vm_area_struct of size 168 [ 38.788328] The buggy address is located 88 bytes inside of [ 38.788328] freed 168-byte region [ffff88800ee0a740, ffff88800ee0a7e8) [ 38.789084] [ 38.789201] The buggy address belongs to the physical page: [ 38.789555] page:000000007bdf0856 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xee0a [ 38.790141] memcg:ffff88800e929e01 [ 38.790373] flags: 0x100000000000200(slab|node=0|zone=1) [ 38.790724] page_type: 0xffffffff() [ 38.790970] raw: 0100000000000200 ffff8880087a0c80 ffffea00004054c0 dead000000000004 [ 38.791506] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800e929e01 [ 38.791994] page dumped because: kasan: bad access detected [ 38.792356] [ 38.792476] Memory state around the buggy address: [ 38.792797] ffff88800ee0a680: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 38.793264] ffff88800ee0a700: fc fc fc fc fc fc fc fc fa fb fb fb fb fb fb fb [ 38.793740] >ffff88800ee0a780: fb fb fb fb fb fb fb fb fb fb fb fb fb fc fc fc [ 38.794211] ^ [ 38.794485] ffff88800ee0a800: fc fc fc fc fc 00 00 00 00 00 00 00 00 00 00 00 [ 38.794958] ffff88800ee0a880: 00 00 00 00 00 00 00 00 00 00 fc fc fc fc fc fc [ 38.795440] ================================================================== [ 38.795932] Disabling lock debugging due to kernel taint [ 40.786000] BUG: Bad rss-counter state mm:00000000d76ac51a type:MM_FILEPAGES val:33 [ 40.787253] BUG: Bad rss-counter state mm:00000000d76ac51a type:MM_ANONPAGES val:22 [ 41.190190] BUG: Bad rss-counter state mm:000000002e1398aa type:MM_FILEPAGES val:33 [ 41.191378] BUG: Bad rss-counter state mm:000000002e1398aa type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:58045' (ECDSA) to the list of known hosts. 2023/06/21 07:32:08 fuzzer started 2023/06/21 07:32:08 dialing manager at localhost:36067 2023/06/21 07:32:08 checking machine... 2023/06/21 07:32:08 checking revisions... [ 41.776568] kmemleak: Automatic memory scanning thread ended 2023/06/21 07:32:09 testing simple program... [ 41.832053] cgroup: Unknown subsys name 'net' [ 41.878772] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 07:32:08 Registers: info registers vcpu 0 RAX=0000000000000000 RBX=0000000000000000 RCX=0000000000000000 RDX=ffff888016923680 RSI=ffffffff83869188 RDI=0000000000000004 RBP=ffff888019dd7c48 RSP=ffff888019dd7b20 R8 =0000000000000004 R9 =0000000000000002 R10=0000000000000003 R11=0000000000000000 R12=0000000000000000 R13=00000000000000e5 R14=ffff888008fe8000 R15=ffff88800ebc7800 RIP=ffffffff84511dc4 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 00007fa3fb514900 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=00007ffe55ce8000 CR3=000000000e976000 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=74696d7265705f6d61703d73726f746e XMM02=000000000000000000000000000000ff XMM03=5320444f4854454d5f54505952434e45 XMM04=40404040404040404040404040404040 XMM05=5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a XMM06=20202020202020202020202020202020 XMM07=00000000000000000000000000000000 XMM08=61662029286e65706f5f746964756100 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=00007f4239787900 CR3=0000000009a16000 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=b10c3849bcc20a9b314ee8ac81228b5f XMM02=000000000011b008ec2efd57dc4c00df XMM03=00000000001219c82fee0d2180dd5eab XMM04=2190eb88d444a96400000000000ae988 XMM05=19e9129bd510f23500000000001315c8 XMM06=4fda316b135da52b0000000000131450 XMM07=e042d86d42eb936e0000000000121ca0 XMM08=2fee0d2180dd5eab000000000011b068 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000