syzkaller login: [ 38.952201] BUG: Bad rss-counter state mm:00000000de996438 type:MM_FILEPAGES val:33 [ 38.953385] BUG: Bad rss-counter state mm:00000000de996438 type:MM_ANONPAGES val:22 [ 38.991830] ================================================================== [ 38.992818] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 38.993770] Read of size 8 at addr ffff888018510310 by task sshd/219 [ 38.994547] [ 38.994794] CPU: 0 PID: 219 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 38.995665] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 38.996640] Call Trace: [ 38.996959] [ 38.997244] dump_stack_lvl+0x91/0xf0 [ 38.997739] print_report+0xcc/0x620 [ 38.998237] ? __virt_addr_valid+0x102/0x340 [ 38.998815] ? vma_interval_tree_remove+0xc75/0xec0 [ 38.999433] ? vma_interval_tree_remove+0xc75/0xec0 [ 39.000053] kasan_report+0xbe/0xf0 [ 39.000530] ? vma_interval_tree_remove+0xc75/0xec0 [ 39.001162] vma_interval_tree_remove+0xc75/0xec0 [ 39.001772] vma_prepare+0xc54/0x11a0 [ 39.002251] __split_vma+0x5af/0x950 [ 39.002738] ? __pfx___split_vma+0x10/0x10 [ 39.003283] ? find_held_lock+0x2c/0x110 [ 39.003810] do_vmi_align_munmap+0x2ba/0x11f0 [ 39.004381] ? lock_is_held_type+0x9f/0x120 [ 39.004924] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 39.005535] ? mtree_range_walk+0x632/0x900 [ 39.006094] ? mas_walk+0x5c7/0x7c0 [ 39.006573] do_vmi_munmap+0x1f1/0x2b0 [ 39.007094] mmap_region+0x1f9/0x2660 [ 39.007573] ? vm_mmap_pgoff+0x15c/0x3a0 [ 39.008093] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 39.008804] ? __pfx_lock_acquire+0x10/0x10 [ 39.009348] ? __pfx_mmap_region+0x10/0x10 [ 39.009883] ? security_mmap_addr+0x7d/0xa0 [ 39.010421] ? get_unmapped_area+0x1f5/0x3f0 [ 39.010984] do_mmap+0x854/0xf00 [ 39.011425] vm_mmap_pgoff+0x1a6/0x3a0 [ 39.011919] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 39.012487] ksys_mmap_pgoff+0x3af/0x500 [ 39.012995] do_syscall_64+0x3f/0x90 [ 39.013479] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 39.014127] RIP: 0033:0x7f8f18543d82 [ 39.014583] 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 [ 39.016738] RSP: 002b:00007fff207bb3b8 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 39.017650] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f8f18543d82 [ 39.018494] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f8f1797d000 [ 39.019481] RBP: 00007f8f1797d000 R08: 0000000000000009 R09: 0000000000001000 [ 39.020331] R10: 0000000000000812 R11: 0000000000000206 R12: 00005600d7379b20 [ 39.021203] R13: 00007fff207bb3d0 R14: 00007fff207bb400 R15: 00007fff207bb760 [ 39.022057] [ 39.022353] [ 39.022570] Allocated by task 212: [ 39.023032] kasan_save_stack+0x22/0x50 [ 39.023539] kasan_set_track+0x25/0x30 [ 39.024036] __kasan_slab_alloc+0x59/0x70 [ 39.024561] kmem_cache_alloc+0x16b/0x370 [ 39.025075] vm_area_dup+0x20/0x160 [ 39.025529] __split_vma+0x170/0x950 [ 39.026004] split_vma+0xc6/0x110 [ 39.026443] mprotect_fixup+0x8d2/0xb30 [ 39.026960] do_mprotect_pkey+0x87e/0xd40 [ 39.027479] __x64_sys_mprotect+0x78/0xc0 [ 39.027998] do_syscall_64+0x3f/0x90 [ 39.028471] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 39.029110] [ 39.029328] Freed by task 212: [ 39.029722] kasan_save_stack+0x22/0x50 [ 39.030232] kasan_set_track+0x25/0x30 [ 39.030736] kasan_save_free_info+0x2b/0x50 [ 39.031268] __kasan_slab_free+0x10a/0x190 [ 39.031803] kmem_cache_free+0x10d/0x4d0 [ 39.032318] rcu_core+0x8c8/0x2860 [ 39.032761] __do_softirq+0x1b7/0x7d4 [ 39.033246] [ 39.033464] Last potentially related work creation: [ 39.034052] kasan_save_stack+0x22/0x50 [ 39.034557] __kasan_record_aux_stack+0x8e/0xa0 [ 39.035151] __call_rcu_common.constprop.0+0x6a/0xb90 [ 39.035792] remove_vma+0x139/0x170 [ 39.036243] do_vmi_align_munmap+0xd4a/0x11f0 [ 39.036804] do_vmi_munmap+0x1f1/0x2b0 [ 39.037296] __vm_munmap+0x138/0x3a0 [ 39.037763] __x64_sys_munmap+0x59/0x80 [ 39.038264] do_syscall_64+0x3f/0x90 [ 39.038755] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 39.039402] [ 39.039620] Second to last potentially related work creation: [ 39.040315] kasan_save_stack+0x22/0x50 [ 39.040815] __kasan_record_aux_stack+0x8e/0xa0 [ 39.041391] __call_rcu_common.constprop.0+0x6a/0xb90 [ 39.042033] remove_vma+0x139/0x170 [ 39.042490] do_vmi_align_munmap+0xd4a/0x11f0 [ 39.043055] do_vmi_munmap+0x1f1/0x2b0 [ 39.043538] __vm_munmap+0x138/0x3a0 [ 39.044003] __x64_sys_munmap+0x59/0x80 [ 39.044506] do_syscall_64+0x3f/0x90 [ 39.044985] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 39.045633] [ 39.045852] The buggy address belongs to the object at ffff8880185102b8 [ 39.045852] which belongs to the cache vm_area_struct of size 168 [ 39.047332] The buggy address is located 88 bytes inside of [ 39.047332] freed 168-byte region [ffff8880185102b8, ffff888018510360) [ 39.048780] [ 39.049007] The buggy address belongs to the physical page: [ 39.049667] page:00000000b2d5c26c refcount:1 mapcount:0 mapping:0000000000000000 index:0xffff888018510910 pfn:0x18510 [ 39.050895] memcg:ffff888018511001 [ 39.051328] anon flags: 0x100000000000200(slab|node=0|zone=1) [ 39.052042] page_type: 0xffffffff() [ 39.052497] raw: 0100000000000200 ffff88800879fc80 0000000000000000 dead000000000001 [ 39.053409] raw: ffff888018510910 000000008011000f 00000001ffffffff ffff888018511001 [ 39.054327] page dumped because: kasan: bad access detected [ 39.055021] [ 39.055238] Memory state around the buggy address: [ 39.055829] ffff888018510200: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fc [ 39.056695] ffff888018510280: fc fc fc fc fc fc fc fa fb fb fb fb fb fb fb fb [ 39.057560] >ffff888018510300: fb fb fb fb fb fb fb fb fb fb fb fb fc fc fc fc [ 39.058412] ^ [ 39.058881] ffff888018510380: fc fc fc fc 00 00 00 00 00 00 00 00 00 00 00 00 [ 39.059728] ffff888018510400: 00 00 00 00 00 00 00 00 00 fc fc fc fc fc fc fc [ 39.060572] ================================================================== [ 39.061670] Disabling lock debugging due to kernel taint [ 41.065773] BUG: Bad rss-counter state mm:00000000a301ab0f type:MM_FILEPAGES val:33 [ 41.066739] BUG: Bad rss-counter state mm:00000000a301ab0f type:MM_ANONPAGES val:22 [ 41.569026] BUG: Bad rss-counter state mm:00000000674c826a type:MM_FILEPAGES val:33 [ 41.570119] BUG: Bad rss-counter state mm:00000000674c826a type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:42557' (ECDSA) to the list of known hosts. 2023/06/19 15:12:43 fuzzer started 2023/06/19 15:12:43 dialing manager at localhost:44161 2023/06/19 15:12:43 checking machine... 2023/06/19 15:12:43 checking revisions... [ 42.337439] kmemleak: Automatic memory scanning thread ended 2023/06/19 15:12:43 testing simple program... [ 42.396460] cgroup: Unknown subsys name 'net' [ 42.444842] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 15:12:43 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=00007f5fb6191010 CR3=0000000009e50000 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=384222de2d4090a56b475387ce095d43 XMM02=2c67c8bc2e329bc3000000000011e3a8 XMM03=fb795ef6d657705600000000001245b0 XMM04=72d5b46de023715500000000000ae988 XMM05=66192ac18c9e78bf0000000000136018 XMM06=806171799158d9670000000000134d48 XMM07=e042d86d42eb936e0000000000124888 XMM08=fd6e6fb39a6bc8b0000000000011e408 XMM09=00000000000000000000000000000000 XMM10=20200000000020202020202020200000 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=1ffff1100d9e13a4 RSP=ffff88806cf09d10 R8 =0000000000000000 R9 =fffffbfff0ba77da R10=ffffffff85d3bed7 R11=00000000000b6996 R12=ffff88806cf361a0 R13=ffffffff81830685 R14=0000000000000000 R15=0000000000000000 RIP=ffffffff812d86a2 RFL=00000047 [---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 00007fbc933ef900 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=00007ffdb091d000 CR3=000000000dfea000 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=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