syzkaller login: [ 30.937951] BUG: Bad rss-counter state mm:000000002c9251b7 type:MM_FILEPAGES val:33 [ 30.938686] BUG: Bad rss-counter state mm:000000002c9251b7 type:MM_ANONPAGES val:22 [ 31.068133] ================================================================== [ 31.068797] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 31.069441] Read of size 8 at addr ffff88800da7c140 by task sshd/221 [ 31.070005] [ 31.070156] CPU: 0 PID: 221 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 31.070755] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 31.071438] Call Trace: [ 31.071663] [ 31.071867] dump_stack_lvl+0x91/0xf0 [ 31.072249] print_report+0xcc/0x620 [ 31.072612] ? __virt_addr_valid+0x102/0x340 [ 31.073110] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.073558] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.073969] kasan_report+0xbe/0xf0 [ 31.074291] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.074728] vma_interval_tree_remove+0xc75/0xec0 [ 31.075175] vma_prepare+0xc54/0x11a0 [ 31.075512] __split_vma+0x5af/0x950 [ 31.075863] ? __pfx___split_vma+0x10/0x10 [ 31.076229] ? find_held_lock+0x2c/0x110 [ 31.076587] do_vmi_align_munmap+0x2ba/0x11f0 [ 31.076979] ? lock_is_held_type+0x9f/0x120 [ 31.077360] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 31.077801] ? mtree_range_walk+0x632/0x900 [ 31.078160] ? mas_walk+0x5c7/0x7c0 [ 31.078496] do_vmi_munmap+0x1f1/0x2b0 [ 31.078832] mmap_region+0x1f9/0x2660 [ 31.079162] ? vm_mmap_pgoff+0x15c/0x3a0 [ 31.079524] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 31.080008] ? __pfx_lock_acquire+0x10/0x10 [ 31.080369] ? __pfx_mmap_region+0x10/0x10 [ 31.080735] ? security_mmap_addr+0x7d/0xa0 [ 31.081103] ? get_unmapped_area+0x1f5/0x3f0 [ 31.081478] do_mmap+0x854/0xf00 [ 31.081821] vm_mmap_pgoff+0x1a6/0x3a0 [ 31.082172] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 31.082552] ksys_mmap_pgoff+0x3af/0x500 [ 31.082885] do_syscall_64+0x3f/0x90 [ 31.083215] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.083653] RIP: 0033:0x7f378b0d0d82 [ 31.083998] 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 [ 31.085475] RSP: 002b:00007ffca8b40dd8 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 31.086154] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f378b0d0d82 [ 31.086726] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f378a50a000 [ 31.087292] RBP: 00007f378a50a000 R08: 0000000000000009 R09: 0000000000001000 [ 31.087879] R10: 0000000000000812 R11: 0000000000000206 R12: 000055c93a418b20 [ 31.088476] R13: 00007ffca8b40df0 R14: 00007ffca8b40e20 R15: 00007ffca8b41180 [ 31.089065] [ 31.089258] [ 31.089390] Allocated by task 214: [ 31.089684] kasan_save_stack+0x22/0x50 [ 31.090041] kasan_set_track+0x25/0x30 [ 31.090370] __kasan_slab_alloc+0x59/0x70 [ 31.090726] kmem_cache_alloc+0x16b/0x370 [ 31.091091] vm_area_dup+0x20/0x160 [ 31.091412] __split_vma+0x170/0x950 [ 31.091730] split_vma+0xc6/0x110 [ 31.092031] mprotect_fixup+0x8d2/0xb30 [ 31.092366] do_mprotect_pkey+0x87e/0xd40 [ 31.092713] __x64_sys_mprotect+0x78/0xc0 [ 31.093062] do_syscall_64+0x3f/0x90 [ 31.093398] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.093900] [ 31.094049] Freed by task 19: [ 31.094311] kasan_save_stack+0x22/0x50 [ 31.094667] kasan_set_track+0x25/0x30 [ 31.094985] kasan_save_free_info+0x2b/0x50 [ 31.095336] __kasan_slab_free+0x10a/0x190 [ 31.095689] kmem_cache_free+0x10d/0x4d0 [ 31.096023] rcu_core+0x8c8/0x2860 [ 31.096317] __do_softirq+0x1b7/0x7d4 [ 31.096637] [ 31.096777] Last potentially related work creation: [ 31.097168] kasan_save_stack+0x22/0x50 [ 31.097504] __kasan_record_aux_stack+0x8e/0xa0 [ 31.097916] __call_rcu_common.constprop.0+0x6a/0xb90 [ 31.098342] remove_vma+0x139/0x170 [ 31.098650] do_vmi_align_munmap+0xd4a/0x11f0 [ 31.099019] do_vmi_munmap+0x1f1/0x2b0 [ 31.099334] __vm_munmap+0x138/0x3a0 [ 31.099638] __x64_sys_munmap+0x59/0x80 [ 31.099946] do_syscall_64+0x3f/0x90 [ 31.100246] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.100671] [ 31.100806] The buggy address belongs to the object at ffff88800da7c0e8 [ 31.100806] which belongs to the cache vm_area_struct of size 168 [ 31.101805] The buggy address is located 88 bytes inside of [ 31.101805] freed 168-byte region [ffff88800da7c0e8, ffff88800da7c190) [ 31.102827] [ 31.102988] The buggy address belongs to the physical page: [ 31.103452] page:000000008e6d90e3 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xda7c [ 31.104256] memcg:ffff88800eeec501 [ 31.104554] flags: 0x100000000000200(slab|node=0|zone=1) [ 31.105001] page_type: 0xffffffff() [ 31.105313] raw: 0100000000000200 ffff88800879fc80 dead000000000122 0000000000000000 [ 31.106051] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800eeec501 [ 31.106695] page dumped because: kasan: bad access detected [ 31.107168] [ 31.107323] Memory state around the buggy address: [ 31.107734] ffff88800da7c000: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 31.108333] ffff88800da7c080: 00 00 00 00 00 fc fc fc fc fc fc fc fc fa fb fb [ 31.108900] >ffff88800da7c100: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 31.109475] ^ [ 31.109946] ffff88800da7c180: fb fb fc fc fc fc fc fc fc fc fa fb fb fb fb fb [ 31.110541] ffff88800da7c200: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fc [ 31.111129] ================================================================== [ 31.112173] Disabling lock debugging due to kernel taint [ 32.584939] BUG: Bad rss-counter state mm:00000000653e04ea type:MM_FILEPAGES val:33 [ 32.585850] BUG: Bad rss-counter state mm:00000000653e04ea type:MM_ANONPAGES val:22 [ 32.891446] BUG: Bad rss-counter state mm:00000000fdf70e27 type:MM_FILEPAGES val:33 [ 32.892252] BUG: Bad rss-counter state mm:00000000fdf70e27 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:1343' (ECDSA) to the list of known hosts. 2023/06/20 08:56:51 fuzzer started 2023/06/20 08:56:52 dialing manager at localhost:44161 2023/06/20 08:56:52 checking machine... 2023/06/20 08:56:52 checking revisions... [ 33.665003] kmemleak: Automatic memory scanning thread ended 2023/06/20 08:56:52 testing simple program... [ 33.708043] cgroup: Unknown subsys name 'net' [ 33.770610] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 08:56:51 Registers: info registers vcpu 0 RAX=0000000000000001 RBX=ffffffff83639306 RCX=0000000000000001 RDX=1ffff11001faeed6 RSI=ffff88800fd77cb0 RDI=ffffffff83639306 RBP=ffffffff83639306 RSP=ffff88800fd77620 R8 =0000000000000001 R9 =ffff88800fd77698 R10=0000000000038001 R11=0000000000091be7 R12=ffff88800fd77720 R13=0000000000000000 R14=ffff888009f4b680 R15=0000000000092cc0 RIP=ffffffff811fc7be RFL=00000292 [--S-A--] 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 00007fcd92f92900 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=00007ffc457b1000 CR3=000000000e5bc000 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=6720646572637465733a4d41503d706f XMM01=652022746f6f72223d74636361207469 XMM02=3d6c616e696d72657420322e322e302e XMM03=3d656d616e74736f682022646873732f XMM04=40404040404040404040404040404040 XMM05=5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a XMM06=20202020202020202020202020202020 XMM07=00000000000000000000000000000000 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=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=00007fc6787a52b0 CR3=000000000ee7a000 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=2031353a36353a3830203032206e754a XMM01=73732878696e755f6d6170203a5d3033 XMM02=65736f6c63206e6f6973736573203a29 XMM03=755f6d6170203a5d3033325b64687373 XMM04=69662068637573206f4e203a656c6163 XMM05=3a656c696620766e65206e65706f206f XMM06=65733a6468737328766e655f6d617020 XMM07=6b7a79732031353a36353a3830203032 XMM08=3d656e696c646d632022656369767265 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000