syzkaller login: [ 30.852034] BUG: Bad rss-counter state mm:00000000999f8161 type:MM_FILEPAGES val:33 [ 30.853426] BUG: Bad rss-counter state mm:00000000999f8161 type:MM_ANONPAGES val:22 [ 31.005458] ================================================================== [ 31.006377] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 31.007326] Read of size 8 at addr ffff88800e47ea50 by task sshd/222 [ 31.008106] [ 31.008521] CPU: 1 PID: 222 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 31.009422] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 31.010423] Call Trace: [ 31.010764] [ 31.011091] dump_stack_lvl+0x91/0xf0 [ 31.011708] print_report+0xcc/0x620 [ 31.012305] ? __virt_addr_valid+0x102/0x340 [ 31.012984] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.013758] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.014515] kasan_report+0xbe/0xf0 [ 31.015087] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.015843] vma_interval_tree_remove+0xc75/0xec0 [ 31.016597] vma_prepare+0xc54/0x11a0 [ 31.017187] __split_vma+0x5af/0x950 [ 31.017775] ? __pfx___split_vma+0x10/0x10 [ 31.018445] ? find_held_lock+0x2c/0x110 [ 31.019094] do_vmi_align_munmap+0x2ba/0x11f0 [ 31.019879] ? lock_is_held_type+0x9f/0x120 [ 31.020567] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 31.021248] ? mtree_range_walk+0x632/0x900 [ 31.021811] ? mas_walk+0x5c7/0x7c0 [ 31.022320] do_vmi_munmap+0x1f1/0x2b0 [ 31.022819] mmap_region+0x1f9/0x2660 [ 31.023319] ? vm_mmap_pgoff+0x15c/0x3a0 [ 31.023835] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 31.024567] ? __pfx_lock_acquire+0x10/0x10 [ 31.025110] ? __pfx_mmap_region+0x10/0x10 [ 31.025651] ? security_mmap_addr+0x7d/0xa0 [ 31.026197] ? get_unmapped_area+0x1f5/0x3f0 [ 31.026779] do_mmap+0x854/0xf00 [ 31.027238] vm_mmap_pgoff+0x1a6/0x3a0 [ 31.027743] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 31.028331] ksys_mmap_pgoff+0x3af/0x500 [ 31.028845] do_syscall_64+0x3f/0x90 [ 31.029338] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.029988] RIP: 0033:0x7fa7fa95bd82 [ 31.030469] 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 [ 31.032677] RSP: 002b:00007ffc28750fb8 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 31.033607] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007fa7fa95bd82 [ 31.034488] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007fa7f9d95000 [ 31.035367] RBP: 00007fa7f9d95000 R08: 0000000000000009 R09: 0000000000001000 [ 31.036237] R10: 0000000000000812 R11: 0000000000000206 R12: 0000556d7cf4ad90 [ 31.037111] R13: 00007ffc28750fd0 R14: 00007ffc28751000 R15: 00007ffc28751360 [ 31.037986] [ 31.038303] [ 31.038521] Allocated by task 215: [ 31.038959] kasan_save_stack+0x22/0x50 [ 31.039486] kasan_set_track+0x25/0x30 [ 31.039981] __kasan_slab_alloc+0x59/0x70 [ 31.040549] kmem_cache_alloc+0x16b/0x370 [ 31.041069] vm_area_dup+0x20/0x160 [ 31.041541] __split_vma+0x170/0x950 [ 31.042021] split_vma+0xc6/0x110 [ 31.042489] mprotect_fixup+0x8d2/0xb30 [ 31.043005] do_mprotect_pkey+0x87e/0xd40 [ 31.043547] __x64_sys_mprotect+0x78/0xc0 [ 31.044078] do_syscall_64+0x3f/0x90 [ 31.044581] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.045243] [ 31.045463] Freed by task 215: [ 31.045857] kasan_save_stack+0x22/0x50 [ 31.046389] kasan_set_track+0x25/0x30 [ 31.046893] kasan_save_free_info+0x2b/0x50 [ 31.047442] __kasan_slab_free+0x10a/0x190 [ 31.047980] kmem_cache_free+0x10d/0x4d0 [ 31.048534] rcu_core+0x8c8/0x2860 [ 31.048988] __do_softirq+0x1b7/0x7d4 [ 31.049543] [ 31.049763] Last potentially related work creation: [ 31.050371] kasan_save_stack+0x22/0x50 [ 31.050885] __kasan_record_aux_stack+0x8e/0xa0 [ 31.051476] __call_rcu_common.constprop.0+0x6a/0xb90 [ 31.052122] remove_vma+0x139/0x170 [ 31.052608] do_vmi_align_munmap+0xd4a/0x11f0 [ 31.053188] do_vmi_munmap+0x1f1/0x2b0 [ 31.053694] __vm_munmap+0x138/0x3a0 [ 31.054170] __x64_sys_munmap+0x59/0x80 [ 31.054705] do_syscall_64+0x3f/0x90 [ 31.055227] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.056049] [ 31.056293] Second to last potentially related work creation: [ 31.057006] kasan_save_stack+0x22/0x50 [ 31.057525] __kasan_record_aux_stack+0x8e/0xa0 [ 31.058102] __call_rcu_common.constprop.0+0x6a/0xb90 [ 31.058767] remove_vma+0x139/0x170 [ 31.059240] do_vmi_align_munmap+0xd4a/0x11f0 [ 31.059808] do_vmi_munmap+0x1f1/0x2b0 [ 31.060309] mmap_region+0x1f9/0x2660 [ 31.060819] do_mmap+0x854/0xf00 [ 31.061278] vm_mmap_pgoff+0x1a6/0x3a0 [ 31.061770] ksys_mmap_pgoff+0x3af/0x500 [ 31.062304] do_syscall_64+0x3f/0x90 [ 31.062791] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.063463] [ 31.063682] The buggy address belongs to the object at ffff88800e47e9f8 [ 31.063682] which belongs to the cache vm_area_struct of size 168 [ 31.065170] The buggy address is located 88 bytes inside of [ 31.065170] freed 168-byte region [ffff88800e47e9f8, ffff88800e47eaa0) [ 31.066631] [ 31.066852] The buggy address belongs to the physical page: [ 31.067536] page:00000000e736b09c refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xe47e [ 31.068678] memcg:ffff888009739c01 [ 31.069116] anon flags: 0x100000000000200(slab|node=0|zone=1) [ 31.069836] page_type: 0xffffffff() [ 31.070317] raw: 0100000000000200 ffff8880087a0c80 ffffea00003338c0 dead000000000005 [ 31.071258] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff888009739c01 [ 31.072193] page dumped because: kasan: bad access detected [ 31.072885] [ 31.073101] Memory state around the buggy address: [ 31.073699] ffff88800e47e900: fc fc fa fb fb fb fb fb fb fb fb fb fb fb fb fb [ 31.074592] ffff88800e47e980: fb fb fb fb fb fb fb fc fc fc fc fc fc fc fc fa [ 31.075473] >ffff88800e47ea00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 31.076376] ^ [ 31.077083] ffff88800e47ea80: fb fb fb fb fc fc fc fc fc fc fc fc fa fb fb fb [ 31.077969] ffff88800e47eb00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 31.078866] ================================================================== [ 31.079810] Disabling lock debugging due to kernel taint [ 33.267135] BUG: Bad rss-counter state mm:000000006cf0b7df type:MM_FILEPAGES val:33 [ 33.268845] BUG: Bad rss-counter state mm:000000006cf0b7df type:MM_ANONPAGES val:22 [ 33.717798] BUG: Bad rss-counter state mm:000000000b850868 type:MM_FILEPAGES val:33 [ 33.718805] BUG: Bad rss-counter state mm:000000000b850868 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:46452' (ECDSA) to the list of known hosts. 2023/06/21 01:23:12 fuzzer started 2023/06/21 01:23:13 dialing manager at localhost:36067 2023/06/21 01:23:13 checking machine... 2023/06/21 01:23:13 checking revisions... [ 34.402602] kmemleak: Automatic memory scanning thread ended 2023/06/21 01:23:13 testing simple program... [ 34.443800] cgroup: Unknown subsys name 'net' [ 34.493999] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 01:23:12 Registers: info registers vcpu 0 RAX=fffffbfff0ba7a6a RBX=fffffbfff0ba7a6b RCX=ffffffff812d86ea RDX=0000000000000001 RSI=0000000000000008 RDI=ffffffff85d3d350 RBP=fffffbfff0ba7a6a RSP=ffff88800f1d77b8 R8 =0000000000000000 R9 =fffffbfff0ba7a6a R10=ffffffff85d3d357 R11=ff00545000000000 R12=ffff88801a257608 R13=ffffffff818468a3 R14=ffffffff8367562f R15=00000000000000e8 RIP=ffffffff8180f0a8 RFL=00000083 [--S---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 00007f2a72e73900 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=00007f2a7342a618 CR3=000000000c9da000 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=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 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=0000000000000001 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=00007fee9831f9d0 CR3=000000000d914000 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=866e8247be622c924f40c81245408f6f XMM02=2c67c8bc2e329bc3000000000011ae28 XMM03=fb795ef6d657705600000000001223f8 XMM04=690288aec1e69aad00000000000ae988 XMM05=5a9d233068761c4a00000000001335c8 XMM06=d86a33cf9e2a13020000000000132430 XMM07=e042d86d42eb936e0000000000122678 XMM08=f8d5363c83ad7bf9000000000011ae88 XMM09=00000000000000000000000000000000 XMM10=20200000000020202020202020200000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000