syzkaller login: [ 31.032273] BUG: Bad rss-counter state mm:0000000058b57e9c type:MM_FILEPAGES val:33 [ 31.034058] BUG: Bad rss-counter state mm:0000000058b57e9c type:MM_ANONPAGES val:22 [ 31.203558] ================================================================== [ 31.204666] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 31.205636] Read of size 8 at addr ffff888016b01d08 by task sshd/219 [ 31.206521] [ 31.206743] CPU: 0 PID: 219 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 31.207612] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 31.208602] Call Trace: [ 31.208925] [ 31.209207] dump_stack_lvl+0x91/0xf0 [ 31.209700] print_report+0xcc/0x620 [ 31.210186] ? __virt_addr_valid+0x102/0x340 [ 31.210742] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.211360] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.211981] kasan_report+0xbe/0xf0 [ 31.212476] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.213102] vma_interval_tree_remove+0xc75/0xec0 [ 31.213699] vma_prepare+0xc54/0x11a0 [ 31.214184] __split_vma+0x5af/0x950 [ 31.214655] ? __pfx___split_vma+0x10/0x10 [ 31.215190] ? find_held_lock+0x2c/0x110 [ 31.215708] do_vmi_align_munmap+0x2ba/0x11f0 [ 31.216299] ? lock_is_held_type+0x9f/0x120 [ 31.216842] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 31.217460] ? mtree_range_walk+0x632/0x900 [ 31.218010] ? mas_walk+0x5c7/0x7c0 [ 31.218491] do_vmi_munmap+0x1f1/0x2b0 [ 31.218984] mmap_region+0x1f9/0x2660 [ 31.219471] ? vm_mmap_pgoff+0x15c/0x3a0 [ 31.219985] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 31.220707] ? __pfx_lock_acquire+0x10/0x10 [ 31.221242] ? __pfx_mmap_region+0x10/0x10 [ 31.221778] ? security_mmap_addr+0x7d/0xa0 [ 31.222309] ? get_unmapped_area+0x1f5/0x3f0 [ 31.222857] do_mmap+0x854/0xf00 [ 31.223292] vm_mmap_pgoff+0x1a6/0x3a0 [ 31.223785] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 31.224371] ksys_mmap_pgoff+0x3af/0x500 [ 31.224883] do_syscall_64+0x3f/0x90 [ 31.225360] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.226014] RIP: 0033:0x7f1db4075d82 [ 31.226471] 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 [ 31.228643] RSP: 002b:00007fffbc7dac38 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 31.229551] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f1db4075d82 [ 31.230405] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f1db34af000 [ 31.231258] RBP: 00007f1db34af000 R08: 0000000000000009 R09: 0000000000001000 [ 31.232121] R10: 0000000000000812 R11: 0000000000000206 R12: 000055746efa0ec0 [ 31.232967] R13: 00007fffbc7dac50 R14: 00007fffbc7dac80 R15: 00007fffbc7dafe0 [ 31.233836] [ 31.234130] [ 31.234350] Allocated by task 211: [ 31.234781] kasan_save_stack+0x22/0x50 [ 31.235289] kasan_set_track+0x25/0x30 [ 31.235787] __kasan_slab_alloc+0x59/0x70 [ 31.236314] kmem_cache_alloc+0x16b/0x370 [ 31.236833] vm_area_dup+0x20/0x160 [ 31.237280] __split_vma+0x170/0x950 [ 31.237748] split_vma+0xc6/0x110 [ 31.238188] mprotect_fixup+0x8d2/0xb30 [ 31.238691] do_mprotect_pkey+0x87e/0xd40 [ 31.239220] __x64_sys_mprotect+0x78/0xc0 [ 31.239738] do_syscall_64+0x3f/0x90 [ 31.240239] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.240890] [ 31.241106] Freed by task 211: [ 31.241502] kasan_save_stack+0x22/0x50 [ 31.242010] kasan_set_track+0x25/0x30 [ 31.242505] kasan_save_free_info+0x2b/0x50 [ 31.243036] __kasan_slab_free+0x10a/0x190 [ 31.243566] kmem_cache_free+0x10d/0x4d0 [ 31.244109] rcu_core+0x8c8/0x2860 [ 31.244566] __do_softirq+0x1b7/0x7d4 [ 31.245045] [ 31.245258] Last potentially related work creation: [ 31.245854] kasan_save_stack+0x22/0x50 [ 31.246354] __kasan_record_aux_stack+0x8e/0xa0 [ 31.246932] __call_rcu_common.constprop.0+0x6a/0xb90 [ 31.247568] remove_vma+0x139/0x170 [ 31.248037] do_vmi_align_munmap+0xd4a/0x11f0 [ 31.248598] do_vmi_munmap+0x1f1/0x2b0 [ 31.249080] __vm_munmap+0x138/0x3a0 [ 31.249551] __x64_sys_munmap+0x59/0x80 [ 31.250070] do_syscall_64+0x3f/0x90 [ 31.250559] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.251193] [ 31.251404] The buggy address belongs to the object at ffff888016b01cb0 [ 31.251404] which belongs to the cache vm_area_struct of size 168 [ 31.252900] The buggy address is located 88 bytes inside of [ 31.252900] freed 168-byte region [ffff888016b01cb0, ffff888016b01d58) [ 31.254315] [ 31.254530] The buggy address belongs to the physical page: [ 31.255194] page:000000000c3a183d refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x16b01 [ 31.256299] memcg:ffff88800fb9c901 [ 31.256727] flags: 0x100000000000200(slab|node=0|zone=1) [ 31.257374] page_type: 0xffffffff() [ 31.257834] raw: 0100000000000200 ffff88800879fc80 dead000000000100 dead000000000122 [ 31.258753] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800fb9c901 [ 31.259664] page dumped because: kasan: bad access detected [ 31.260367] [ 31.260578] Memory state around the buggy address: [ 31.261157] ffff888016b01c00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fc fc [ 31.262025] ffff888016b01c80: fc fc fc fc fc fc fa fb fb fb fb fb fb fb fb fb [ 31.262886] >ffff888016b01d00: fb fb fb fb fb fb fb fb fb fb fb fc fc fc fc fc [ 31.263745] ^ [ 31.264189] ffff888016b01d80: fc fc fc 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 31.265060] ffff888016b01e00: 00 00 00 00 00 00 00 00 fc fc fc fc fc fc fc fc [ 31.265907] ================================================================== [ 31.266990] Disabling lock debugging due to kernel taint [ 33.607447] BUG: Bad rss-counter state mm:0000000027b0273f type:MM_FILEPAGES val:33 [ 33.608453] BUG: Bad rss-counter state mm:0000000027b0273f type:MM_ANONPAGES val:22 [ 34.222840] BUG: Bad rss-counter state mm:00000000bca49bcb type:MM_FILEPAGES val:33 [ 34.224011] BUG: Bad rss-counter state mm:00000000bca49bcb type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:60514' (ECDSA) to the list of known hosts. 2023/06/19 12:59:44 fuzzer started 2023/06/19 12:59:44 dialing manager at localhost:44161 2023/06/19 12:59:44 checking machine... 2023/06/19 12:59:44 checking revisions... [ 34.855856] kmemleak: Automatic memory scanning thread ended 2023/06/19 12:59:44 testing simple program... [ 34.897726] cgroup: Unknown subsys name 'net' [ 34.949071] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 12:59:41 Registers: info registers vcpu 0 RAX=1ffff11001e654a1 RBX=dffffc0000000000 RCX=0000000000000000 RDX=ffff88800e4f9b40 RSI=ffffffff83c1ea7e RDI=ffff88800f32a508 RBP=1ffff11003388f9b RSP=ffff888019c47cc8 R8 =0000000000000001 R9 =ffffed1003388f8b R10=0000000000000003 R11=0000000000000001 R12=ffff88800f32a000 R13=ffff888019c47e32 R14=ffff888019c47cf8 R15=ffff888008c2cb78 RIP=ffffffff83c1ea91 RFL=00000246 [---Z-P-] 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 00007f6a26fe6900 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=00007f6a2759b650 CR3=000000000eea4000 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=00007ff1ea07a220 CR3=000000000cac8000 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=2033343a39353a3231203931206e754a XMM01=73732878696e755f6d6170203a5d3832 XMM02=65736f6c63206e6f6973736573203a29 XMM03=755f6d6170203a5d3832325b64687373 XMM04=69662068637573206f4e203a656c6163 XMM05=3a656c696620766e65206e65706f206f XMM06=65733a6468737328766e655f6d617020 XMM07=6b7a79732033343a39353a3231203931 XMM08=3d656e696c646d632022656369767265 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000