syzkaller login: [ 40.974372] BUG: Bad rss-counter state mm:00000000f5223bcb type:MM_FILEPAGES val:33 [ 40.975134] BUG: Bad rss-counter state mm:00000000f5223bcb type:MM_ANONPAGES val:22 [ 41.006256] ================================================================== [ 41.006996] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 41.007655] Read of size 8 at addr ffff88800e117d08 by task sshd/218 [ 41.008442] [ 41.008599] CPU: 1 PID: 218 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 41.009220] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 41.009899] Call Trace: [ 41.010269] [ 41.010471] dump_stack_lvl+0x91/0xf0 [ 41.010820] print_report+0xcc/0x620 [ 41.011167] ? __virt_addr_valid+0x102/0x340 [ 41.011554] ? vma_interval_tree_remove+0xc75/0xec0 [ 41.011988] ? vma_interval_tree_remove+0xc75/0xec0 [ 41.012425] kasan_report+0xbe/0xf0 [ 41.012794] ? vma_interval_tree_remove+0xc75/0xec0 [ 41.013252] vma_interval_tree_remove+0xc75/0xec0 [ 41.013680] vma_prepare+0xc54/0x11a0 [ 41.014030] __split_vma+0x5af/0x950 [ 41.014367] ? __pfx___split_vma+0x10/0x10 [ 41.014749] ? find_held_lock+0x2c/0x110 [ 41.015126] do_vmi_align_munmap+0x2ba/0x11f0 [ 41.015531] ? lock_is_held_type+0x9f/0x120 [ 41.015910] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 41.016357] ? mtree_range_walk+0x632/0x900 [ 41.016751] ? mas_walk+0x5c7/0x7c0 [ 41.017097] do_vmi_munmap+0x1f1/0x2b0 [ 41.017462] mmap_region+0x1f9/0x2660 [ 41.017803] ? vm_mmap_pgoff+0x15c/0x3a0 [ 41.018164] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 41.018668] ? __pfx_lock_acquire+0x10/0x10 [ 41.019057] ? __pfx_mmap_region+0x10/0x10 [ 41.019439] ? security_mmap_addr+0x7d/0xa0 [ 41.019816] ? get_unmapped_area+0x1f5/0x3f0 [ 41.020207] do_mmap+0x854/0xf00 [ 41.020528] vm_mmap_pgoff+0x1a6/0x3a0 [ 41.020881] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 41.021308] ksys_mmap_pgoff+0x3af/0x500 [ 41.021668] do_syscall_64+0x3f/0x90 [ 41.022006] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 41.022465] RIP: 0033:0x7fd172e62d82 [ 41.022795] 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 [ 41.024317] RSP: 002b:00007ffc5c691ea8 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 41.024969] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007fd172e62d82 [ 41.025589] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007fd17229c000 [ 41.026198] RBP: 00007fd17229c000 R08: 0000000000000009 R09: 0000000000001000 [ 41.026808] R10: 0000000000000812 R11: 0000000000000206 R12: 000055c34e72cec0 [ 41.027403] R13: 00007ffc5c691ec0 R14: 00007ffc5c691ef0 R15: 00007ffc5c692250 [ 41.028007] [ 41.028214] [ 41.028369] Allocated by task 211: [ 41.028677] kasan_save_stack+0x22/0x50 [ 41.029057] kasan_set_track+0x25/0x30 [ 41.029432] __kasan_slab_alloc+0x59/0x70 [ 41.029796] kmem_cache_alloc+0x16b/0x370 [ 41.030159] vm_area_dup+0x20/0x160 [ 41.030483] __split_vma+0x170/0x950 [ 41.030808] split_vma+0xc6/0x110 [ 41.031116] mprotect_fixup+0x8d2/0xb30 [ 41.031470] do_mprotect_pkey+0x87e/0xd40 [ 41.031840] __x64_sys_mprotect+0x78/0xc0 [ 41.032213] do_syscall_64+0x3f/0x90 [ 41.032553] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 41.033015] [ 41.033180] Freed by task 13: [ 41.033454] kasan_save_stack+0x22/0x50 [ 41.033806] kasan_set_track+0x25/0x30 [ 41.034152] kasan_save_free_info+0x2b/0x50 [ 41.034525] __kasan_slab_free+0x10a/0x190 [ 41.034901] kmem_cache_free+0x10d/0x4d0 [ 41.035257] rcu_core+0x8c8/0x2860 [ 41.035578] __do_softirq+0x1b7/0x7d4 [ 41.035913] [ 41.036061] Last potentially related work creation: [ 41.036476] kasan_save_stack+0x22/0x50 [ 41.036829] __kasan_record_aux_stack+0x8e/0xa0 [ 41.037254] __call_rcu_common.constprop.0+0x6a/0xb90 [ 41.037717] remove_vma+0x139/0x170 [ 41.038036] do_vmi_align_munmap+0xd4a/0x11f0 [ 41.038433] do_vmi_munmap+0x1f1/0x2b0 [ 41.038779] __vm_munmap+0x138/0x3a0 [ 41.039114] __x64_sys_munmap+0x59/0x80 [ 41.039467] do_syscall_64+0x3f/0x90 [ 41.039814] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 41.040283] [ 41.040450] The buggy address belongs to the object at ffff88800e117cb0 [ 41.040450] which belongs to the cache vm_area_struct of size 168 [ 41.041696] The buggy address is located 88 bytes inside of [ 41.041696] freed 168-byte region [ffff88800e117cb0, ffff88800e117d58) [ 41.042755] [ 41.042920] The buggy address belongs to the physical page: [ 41.043417] page:00000000e80354c6 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xe117 [ 41.044220] memcg:ffff88800e616f01 [ 41.044535] anon flags: 0x100000000000200(slab|node=0|zone=1) [ 41.045049] page_type: 0xffffffff() [ 41.045399] raw: 0100000000000200 ffff88800879fc80 ffffea0000353380 dead000000000007 [ 41.046082] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800e616f01 [ 41.046756] page dumped because: kasan: bad access detected [ 41.047386] [ 41.047546] Memory state around the buggy address: [ 41.047969] ffff88800e117c00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fc fc [ 41.048604] ffff88800e117c80: fc fc fc fc fc fc fa fb fb fb fb fb fb fb fb fb [ 41.049269] >ffff88800e117d00: fb fb fb fb fb fb fb fb fb fb fb fc fc fc fc fc [ 41.049883] ^ [ 41.050199] ffff88800e117d80: fc fc fc fa fb fb fb fb fb fb fb fb fb fb fb fb [ 41.050831] ffff88800e117e00: fb fb fb fb fb fb fb fb fc fc fc fc fc fc fc fc [ 41.051458] ================================================================== [ 41.052191] Disabling lock debugging due to kernel taint [ 43.056176] BUG: Bad rss-counter state mm:00000000a63d2fc3 type:MM_FILEPAGES val:33 [ 43.057041] BUG: Bad rss-counter state mm:00000000a63d2fc3 type:MM_ANONPAGES val:22 [ 43.489553] BUG: Bad rss-counter state mm:00000000987ee50c type:MM_FILEPAGES val:33 [ 43.490216] BUG: Bad rss-counter state mm:00000000987ee50c type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:43471' (ECDSA) to the list of known hosts. 2023/06/20 09:05:48 fuzzer started 2023/06/20 09:05:48 dialing manager at localhost:44161 2023/06/20 09:05:48 checking machine... 2023/06/20 09:05:48 checking revisions... [ 43.993692] kmemleak: Automatic memory scanning thread ended 2023/06/20 09:05:49 testing simple program... [ 44.033541] cgroup: Unknown subsys name 'net' [ 44.069535] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 09:05:46 Registers: info registers vcpu 0 RAX=ffff88806ce35000 RBX=0000000000000000 RCX=ffffffff8450c50e RDX=ffffed100d9c6a01 RSI=0000000000000004 RDI=ffffffff812889a5 RBP=dffffc0000000000 RSP=ffffffff85407e10 R8 =0000000000000000 R9 =ffffed100d9c6a00 R10=ffff88806ce35003 R11=ffff888008c58000 R12=ffffffff85d3bed0 R13=1ffffffff0a80fc7 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 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=00007fff95278f98 CR3=000000001871e000 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=2038343a35303a3930203032206e754a XMM01=73732878696e755f6d6170203a5d3732 XMM02=65736f6c63206e6f6973736573203a29 XMM03=755f6d6170203a5d3732325b64687373 XMM04=69662068637573206f4e203a656c6163 XMM05=3a656c696620766e65206e65706f206f XMM06=65733a6468737328766e655f6d617020 XMM07=6b7a79732038343a35303a3930203032 XMM08=3d656e696c646d632022656369767265 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=0000000000000001 RBX=0000000000000001 RCX=ffffffff812d869a RDX=fffffbfff0ba77db RSI=0000000000000008 RDI=ffffffff85d3bed0 RBP=1ffff1100d9e13ab RSP=ffff88806cf09d48 R8 =0000000000000000 R9 =fffffbfff0ba77da R10=ffffffff85d3bed7 R11=00000000000b6996 R12=ffffffff8560b640 R13=ffffffff81803a7c R14=ffffffff818d9dc6 R15=ffff88800db40200 RIP=ffffffff812d8ad3 RFL=00000247 [---Z-PC] 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 00007efc0019b900 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=00007efc00752618 CR3=000000000fd00000 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=6e69676f6c5f6d61702c78756e696c65 XMM02=755f6d61702c74696d7265705f6d6170 XMM03=2c766e655f6d61702c7374696d696c5f XMM04=6d61702c766e655f6d61702c7374696d XMM05=78696e755f6d61702c74696d7265705f XMM06=6469756e69676f6c5f6d61702c78756e XMM07=672065736f6c635f6e6f69737365733a XMM08=61662029286e65706f5f746964756100 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000