syzkaller login: [ 30.796066] BUG: Bad rss-counter state mm:0000000036c96566 type:MM_FILEPAGES val:33 [ 30.797147] BUG: Bad rss-counter state mm:0000000036c96566 type:MM_ANONPAGES val:22 [ 30.972156] ================================================================== [ 30.973123] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 30.974102] Read of size 8 at addr ffff88800cbb8a50 by task sshd/222 [ 30.974988] [ 30.975220] CPU: 0 PID: 222 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 30.976120] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 30.977176] Call Trace: [ 30.977520] [ 30.977820] dump_stack_lvl+0x91/0xf0 [ 30.978337] print_report+0xcc/0x620 [ 30.978846] ? __virt_addr_valid+0x102/0x340 [ 30.979424] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.980071] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.980729] kasan_report+0xbe/0xf0 [ 30.981232] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.981931] vma_interval_tree_remove+0xc75/0xec0 [ 30.982600] vma_prepare+0xc54/0x11a0 [ 30.983138] __split_vma+0x5af/0x950 [ 30.983680] ? __pfx___split_vma+0x10/0x10 [ 30.984277] ? find_held_lock+0x2c/0x110 [ 30.984889] do_vmi_align_munmap+0x2ba/0x11f0 [ 30.985516] ? lock_is_held_type+0x9f/0x120 [ 30.986056] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 30.986669] ? mtree_range_walk+0x632/0x900 [ 30.987228] ? mas_walk+0x5c7/0x7c0 [ 30.987709] do_vmi_munmap+0x1f1/0x2b0 [ 30.988202] mmap_region+0x1f9/0x2660 [ 30.988700] ? vm_mmap_pgoff+0x15c/0x3a0 [ 30.989221] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 30.989946] ? __pfx_lock_acquire+0x10/0x10 [ 30.990490] ? __pfx_mmap_region+0x10/0x10 [ 30.991030] ? security_mmap_addr+0x7d/0xa0 [ 30.991572] ? get_unmapped_area+0x1f5/0x3f0 [ 30.992129] do_mmap+0x854/0xf00 [ 30.992585] vm_mmap_pgoff+0x1a6/0x3a0 [ 30.993086] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 30.993659] ksys_mmap_pgoff+0x3af/0x500 [ 30.994166] do_syscall_64+0x3f/0x90 [ 30.994651] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.995304] RIP: 0033:0x7fad8aff7d82 [ 30.995766] 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 [ 30.998161] RSP: 002b:00007ffe1ce36d28 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 30.999098] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007fad8aff7d82 [ 30.999899] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007fad8a431000 [ 31.000712] RBP: 00007fad8a431000 R08: 0000000000000009 R09: 0000000000001000 [ 31.001510] R10: 0000000000000812 R11: 0000000000000206 R12: 00005565083d7ec0 [ 31.002302] R13: 00007ffe1ce36d40 R14: 00007ffe1ce36d70 R15: 00007ffe1ce370d0 [ 31.003114] [ 31.003392] [ 31.003596] Allocated by task 215: [ 31.004003] kasan_save_stack+0x22/0x50 [ 31.004483] kasan_set_track+0x25/0x30 [ 31.004978] __kasan_slab_alloc+0x59/0x70 [ 31.005472] kmem_cache_alloc+0x16b/0x370 [ 31.005954] vm_area_dup+0x20/0x160 [ 31.006390] __split_vma+0x170/0x950 [ 31.006831] split_vma+0xc6/0x110 [ 31.007252] mprotect_fixup+0x8d2/0xb30 [ 31.007832] do_mprotect_pkey+0x87e/0xd40 [ 31.008457] __x64_sys_mprotect+0x78/0xc0 [ 31.009070] do_syscall_64+0x3f/0x90 [ 31.009625] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.010363] [ 31.010614] Freed by task 215: [ 31.011070] kasan_save_stack+0x22/0x50 [ 31.011644] kasan_set_track+0x25/0x30 [ 31.012204] kasan_save_free_info+0x2b/0x50 [ 31.012843] __kasan_slab_free+0x10a/0x190 [ 31.013467] kmem_cache_free+0x10d/0x4d0 [ 31.014070] rcu_core+0x8c8/0x2860 [ 31.014629] __do_softirq+0x1b7/0x7d4 [ 31.015228] [ 31.015500] Last potentially related work creation: [ 31.016233] kasan_save_stack+0x22/0x50 [ 31.016892] __kasan_record_aux_stack+0x8e/0xa0 [ 31.017613] __call_rcu_common.constprop.0+0x6a/0xb90 [ 31.018424] remove_vma+0x139/0x170 [ 31.018989] do_vmi_align_munmap+0xd4a/0x11f0 [ 31.019682] do_vmi_munmap+0x1f1/0x2b0 [ 31.020291] __vm_munmap+0x138/0x3a0 [ 31.020891] __x64_sys_munmap+0x59/0x80 [ 31.021518] do_syscall_64+0x3f/0x90 [ 31.022114] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.022920] [ 31.023191] The buggy address belongs to the object at ffff88800cbb89f8 [ 31.023191] which belongs to the cache vm_area_struct of size 168 [ 31.025062] The buggy address is located 88 bytes inside of [ 31.025062] freed 168-byte region [ffff88800cbb89f8, ffff88800cbb8aa0) [ 31.026828] [ 31.027097] The buggy address belongs to the physical page: [ 31.027901] page:0000000027509a2f refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xcbb8 [ 31.029203] memcg:ffff888016d95e01 [ 31.029707] flags: 0x100000000000200(slab|node=0|zone=1) [ 31.030468] page_type: 0xffffffff() [ 31.031000] raw: 0100000000000200 ffff8880087a0c80 dead000000000122 0000000000000000 [ 31.032083] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff888016d95e01 [ 31.033162] page dumped because: kasan: bad access detected [ 31.033939] [ 31.034190] Memory state around the buggy address: [ 31.034873] ffff88800cbb8900: fc fc 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 31.035880] ffff88800cbb8980: 00 00 00 00 00 00 00 fc fc fc fc fc fc fc fc fa [ 31.036905] >ffff88800cbb8a00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 31.037909] ^ [ 31.038733] ffff88800cbb8a80: fb fb fb fb fc fc fc fc fc fc fc fc fa fb fb fb [ 31.039740] ffff88800cbb8b00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 31.040751] ================================================================== [ 31.042028] Disabling lock debugging due to kernel taint [ 33.684837] BUG: Bad rss-counter state mm:0000000045b544da type:MM_FILEPAGES val:33 [ 33.685844] BUG: Bad rss-counter state mm:0000000045b544da type:MM_ANONPAGES val:22 [ 34.191348] BUG: Bad rss-counter state mm:00000000ee8fea40 type:MM_FILEPAGES val:33 [ 34.192339] BUG: Bad rss-counter state mm:00000000ee8fea40 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:52014' (ECDSA) to the list of known hosts. 2023/06/21 09:54:54 fuzzer started 2023/06/21 09:54:55 dialing manager at localhost:36067 2023/06/21 09:54:55 checking machine... 2023/06/21 09:54:55 checking revisions... [ 34.972134] kmemleak: Automatic memory scanning thread ended 2023/06/21 09:54:55 testing simple program... [ 35.025722] cgroup: Unknown subsys name 'net' [ 35.075963] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 09:54:54 Registers: info registers vcpu 0 RAX=dffffc0000000000 RBX=ffffffff85652c08 RCX=0000000000000000 RDX=1ffffffff0aca581 RSI=ffffffff814c84af RDI=0000000000000005 RBP=0000000000000000 RSP=ffff88801be5f8e8 R8 =0000000000000005 R9 =0000000000000000 R10=0000000000000000 R11=00000000000b6a61 R12=0000000000000000 R13=0000000000000000 R14=ffffffff85652c08 R15=0000000000000001 RIP=ffffffff814c0860 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 00007f3dfcd7c900 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=00007ffecfa4f000 CR3=000000000ec40000 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=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 info registers vcpu 1 RAX=0000000000000000 RBX=0000000000000000 RCX=0000000000000000 RDX=000000000001c060 RSI=ffffffff82191d98 RDI=0000000000000007 RBP=ffff88800f350000 RSP=ffff888016a6f7b8 R8 =0000000000000007 R9 =0000000000010000 R10=000000000001c060 R11=0000000000000128 R12=000000000001c060 R13=ffff88800f3501a0 R14=ffff88800f350098 R15=dffffc0000000000 RIP=ffffffff82191d9e RFL=00000093 [--S-A-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 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=00007fe836470840 CR3=000000000d8f2000 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=b1043106e491a59d2b4ea65124ebf8a7 XMM02=000000000011b4b0ec2efd57dc4c00df XMM03=00000000001222585e75bbd504d4409c XMM04=079cef17f02fe00700000000000ae988 XMM05=59d5b690e0af863b00000000001320d0 XMM06=c1b7d4219edade490000000000130f38 XMM07=e042d86d42eb936e00000000001224d8 XMM08=5e75bbd504d4409c000000000011b510 XMM09=00000000000000000000000000000000 XMM10=20200000000020202020202020200000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000