syzkaller login: [ 31.082513] BUG: Bad rss-counter state mm:000000000c7af46f type:MM_FILEPAGES val:33 [ 31.083983] BUG: Bad rss-counter state mm:000000000c7af46f type:MM_ANONPAGES val:22 [ 31.254805] ================================================================== [ 31.255813] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 31.256830] Read of size 8 at addr ffff88801698f310 by task sshd/220 [ 31.257783] [ 31.258026] CPU: 0 PID: 220 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 31.258977] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 31.260054] Call Trace: [ 31.260405] <TASK> [ 31.260714] dump_stack_lvl+0x91/0xf0 [ 31.261250] print_report+0xcc/0x620 [ 31.261806] ? __virt_addr_valid+0x102/0x340 [ 31.262405] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.263081] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.263762] kasan_report+0xbe/0xf0 [ 31.264279] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.264952] vma_interval_tree_remove+0xc75/0xec0 [ 31.265605] vma_prepare+0xc54/0x11a0 [ 31.266133] __split_vma+0x5af/0x950 [ 31.266646] ? __pfx___split_vma+0x10/0x10 [ 31.267224] ? find_held_lock+0x2c/0x110 [ 31.267792] do_vmi_align_munmap+0x2ba/0x11f0 [ 31.268408] ? lock_is_held_type+0x9f/0x120 [ 31.269002] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 31.269671] ? mtree_range_walk+0x632/0x900 [ 31.270311] ? mas_walk+0x5c7/0x7c0 [ 31.270835] do_vmi_munmap+0x1f1/0x2b0 [ 31.271378] mmap_region+0x1f9/0x2660 [ 31.271901] ? vm_mmap_pgoff+0x15c/0x3a0 [ 31.272466] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 31.273246] ? __pfx_lock_acquire+0x10/0x10 [ 31.273834] ? __pfx_mmap_region+0x10/0x10 [ 31.274413] ? security_mmap_addr+0x7d/0xa0 [ 31.274997] ? get_unmapped_area+0x1f5/0x3f0 [ 31.275594] do_mmap+0x854/0xf00 [ 31.276076] vm_mmap_pgoff+0x1a6/0x3a0 [ 31.276613] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 31.277229] ksys_mmap_pgoff+0x3af/0x500 [ 31.277790] do_syscall_64+0x3f/0x90 [ 31.278318] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.279026] RIP: 0033:0x7fa6b70f4d82 [ 31.279532] 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 [ 31.281871] RSP: 002b:00007ffd0fc99d98 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 31.282870] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007fa6b70f4d82 [ 31.283793] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007fa6b652e000 [ 31.284719] RBP: 00007fa6b652e000 R08: 0000000000000009 R09: 0000000000001000 [ 31.285644] R10: 0000000000000812 R11: 0000000000000206 R12: 0000555d48631ec0 [ 31.286661] R13: 00007ffd0fc99db0 R14: 00007ffd0fc99de0 R15: 00007ffd0fc9a140 [ 31.287596] </TASK> [ 31.287911] [ 31.288144] Allocated by task 213: [ 31.288612] kasan_save_stack+0x22/0x50 [ 31.289167] kasan_set_track+0x25/0x30 [ 31.289701] __kasan_slab_alloc+0x59/0x70 [ 31.290294] kmem_cache_alloc+0x16b/0x370 [ 31.290856] vm_area_dup+0x20/0x160 [ 31.291359] __split_vma+0x170/0x950 [ 31.291873] split_vma+0xc6/0x110 [ 31.292351] mprotect_fixup+0x8d2/0xb30 [ 31.292898] do_mprotect_pkey+0x87e/0xd40 [ 31.293471] __x64_sys_mprotect+0x78/0xc0 [ 31.294062] do_syscall_64+0x3f/0x90 [ 31.294610] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.295312] [ 31.295547] Freed by task 19: [ 31.295965] kasan_save_stack+0x22/0x50 [ 31.296520] kasan_set_track+0x25/0x30 [ 31.297054] kasan_save_free_info+0x2b/0x50 [ 31.297645] __kasan_slab_free+0x10a/0x190 [ 31.298233] kmem_cache_free+0x10d/0x4d0 [ 31.298787] rcu_core+0x8c8/0x2860 [ 31.299279] __do_softirq+0x1b7/0x7d4 [ 31.299803] [ 31.300036] Last potentially related work creation: [ 31.300674] kasan_save_stack+0x22/0x50 [ 31.301222] __kasan_record_aux_stack+0x8e/0xa0 [ 31.301872] __call_rcu_common.constprop.0+0x6a/0xb90 [ 31.302578] remove_vma+0x139/0x170 [ 31.303076] do_vmi_align_munmap+0xd4a/0x11f0 [ 31.303680] do_vmi_munmap+0x1f1/0x2b0 [ 31.304205] __vm_munmap+0x138/0x3a0 [ 31.304720] __x64_sys_munmap+0x59/0x80 [ 31.305265] do_syscall_64+0x3f/0x90 [ 31.305787] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.306487] [ 31.306721] Second to last potentially related work creation: [ 31.307463] kasan_save_stack+0x22/0x50 [ 31.308013] __kasan_record_aux_stack+0x8e/0xa0 [ 31.308638] __call_rcu_common.constprop.0+0x6a/0xb90 [ 31.309344] remove_vma+0x139/0x170 [ 31.309854] do_vmi_align_munmap+0xd4a/0x11f0 [ 31.310467] do_vmi_munmap+0x1f1/0x2b0 [ 31.310999] mmap_region+0x1f9/0x2660 [ 31.311521] do_mmap+0x854/0xf00 [ 31.311996] vm_mmap_pgoff+0x1a6/0x3a0 [ 31.312529] ksys_mmap_pgoff+0x3af/0x500 [ 31.313081] do_syscall_64+0x3f/0x90 [ 31.313601] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.314314] [ 31.314548] The buggy address belongs to the object at ffff88801698f2b8 [ 31.314548] which belongs to the cache vm_area_struct of size 168 [ 31.316157] The buggy address is located 88 bytes inside of [ 31.316157] freed 168-byte region [ffff88801698f2b8, ffff88801698f360) [ 31.317698] [ 31.317945] The buggy address belongs to the physical page: [ 31.318664] page:000000000fed35b7 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x1698f [ 31.319858] memcg:ffff888015874b01 [ 31.320321] flags: 0x100000000000200(slab|node=0|zone=1) [ 31.321023] page_type: 0xffffffff() [ 31.321518] raw: 0100000000000200 ffff8880087a0c80 dead000000000100 dead000000000122 [ 31.322544] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff888015874b01 [ 31.323537] page dumped because: kasan: bad access detected [ 31.324261] [ 31.324494] Memory state around the buggy address: [ 31.325129] ffff88801698f200: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 fc [ 31.326075] ffff88801698f280: fc fc fc fc fc fc fc fa fb fb fb fb fb fb fb fb [ 31.327021] >ffff88801698f300: fb fb fb fb fb fb fb fb fb fb fb fb fc fc fc fc [ 31.327953] ^ [ 31.328462] ffff88801698f380: fc fc fc fc 00 00 00 00 00 00 00 00 00 00 00 00 [ 31.329402] ffff88801698f400: 00 00 00 00 00 00 00 00 00 fc fc fc fc fc fc fc [ 31.330343] ================================================================== [ 31.331572] Disabling lock debugging due to kernel taint [ 33.815583] BUG: Bad rss-counter state mm:000000005a182d0a type:MM_FILEPAGES val:33 [ 33.816850] BUG: Bad rss-counter state mm:000000005a182d0a type:MM_ANONPAGES val:22 [ 34.214007] BUG: Bad rss-counter state mm:00000000d2b66c4a type:MM_FILEPAGES val:33 [ 34.215097] BUG: Bad rss-counter state mm:00000000d2b66c4a type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:55689' (ECDSA) to the list of known hosts. 2023/06/20 17:56:40 fuzzer started 2023/06/20 17:56:40 dialing manager at localhost:36067 2023/06/20 17:56:40 checking machine... 2023/06/20 17:56:40 checking revisions... [ 34.949960] kmemleak: Automatic memory scanning thread ended 2023/06/20 17:56:40 testing simple program... [ 34.993442] cgroup: Unknown subsys name 'net' [ 35.041437] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 17:56:40 Registers: info registers vcpu 0 RAX=1ffff110028e0fb1 RBX=ffff888014707d88 RCX=0000000000000000 RDX=ffff888014708000 RSI=ffffffff8199ddd9 RDI=ffff888014707d90 RBP=ffff88800ceae600 RSP=ffff888014707c90 R8 =0000000000000005 R9 =0000000000000000 R10=0000000000000000 R11=0000000000000000 R12=ffff88800ceae618 R13=ffff88800ceae620 R14=dffffc0000000000 R15=ffff888014707d88 RIP=ffffffff8199de35 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 00007fa7d622e900 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=00007fa7d5692a90 CR3=000000000e658000 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=e9a70801d52bfcbbf64f01dfc684bb90 XMM02=000000000011a658ec2efd57dc4c00df XMM03=0000000000121ac0d6fee264aa78af5d XMM04=0dbbc7447bcb6bb000000000000ae988 XMM05=38d10eb5924d4dd70000000000133738 XMM06=4fda316b135da52b0000000000132b60 XMM07=e042d86d42eb936e0000000000121d40 XMM08=d6fee264aa78af5d000000000011a6b8 XMM09=00000000000000000000000000000000 XMM10=20200000000020202020202020200000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=0000000000000000 RBX=ffff888019d4f9c0 RCX=0000000000000000 RDX=0000000000000070 RSI=0000000000000000 RDI=ffff888019d4f928 RBP=ffff8880162e9b40 RSP=ffff888019d4f8d0 R8 =0000000000000004 R9 =0000000000000000 R10=ffff888019d4f928 R11=00000000000b6a61 R12=0000000000000000 R13=ffff888019d4f950 R14=ffff8880162e9b40 R15=ffff888019d4f928 RIP=ffffffff8451341a 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 00007fd5bdeae900 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=000055f862449954 CR3=000000000c69a000 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