syzkaller login: [ 42.060077] BUG: Bad rss-counter state mm:00000000bfacaf26 type:MM_FILEPAGES val:33 [ 42.061143] BUG: Bad rss-counter state mm:00000000bfacaf26 type:MM_ANONPAGES val:22 [ 42.220442] ================================================================== [ 42.221522] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 42.222628] Read of size 8 at addr ffff88800ef6e058 by task sshd/220 [ 42.223701] [ 42.223962] CPU: 1 PID: 220 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 42.225001] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 42.226172] Call Trace: [ 42.226552] [ 42.226891] dump_stack_lvl+0x91/0xf0 [ 42.227476] print_report+0xcc/0x620 [ 42.228050] ? __virt_addr_valid+0x102/0x340 [ 42.228735] ? vma_interval_tree_remove+0xc75/0xec0 [ 42.229415] ? vma_interval_tree_remove+0xc75/0xec0 [ 42.230044] kasan_report+0xbe/0xf0 [ 42.230520] ? vma_interval_tree_remove+0xc75/0xec0 [ 42.231137] vma_interval_tree_remove+0xc75/0xec0 [ 42.231736] vma_prepare+0xc54/0x11a0 [ 42.232220] __split_vma+0x5af/0x950 [ 42.232709] ? __pfx___split_vma+0x10/0x10 [ 42.233237] ? find_held_lock+0x2c/0x110 [ 42.233755] do_vmi_align_munmap+0x2ba/0x11f0 [ 42.234323] ? lock_is_held_type+0x9f/0x120 [ 42.234863] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 42.235474] ? mtree_range_walk+0x632/0x900 [ 42.236030] ? mas_walk+0x5c7/0x7c0 [ 42.236522] do_vmi_munmap+0x1f1/0x2b0 [ 42.237022] mmap_region+0x1f9/0x2660 [ 42.237506] ? vm_mmap_pgoff+0x15c/0x3a0 [ 42.238022] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 42.238748] ? __pfx_lock_acquire+0x10/0x10 [ 42.239283] ? __pfx_mmap_region+0x10/0x10 [ 42.239817] ? security_mmap_addr+0x7d/0xa0 [ 42.240377] ? get_unmapped_area+0x1f5/0x3f0 [ 42.240933] do_mmap+0x854/0xf00 [ 42.241378] vm_mmap_pgoff+0x1a6/0x3a0 [ 42.241883] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 42.242448] ksys_mmap_pgoff+0x3af/0x500 [ 42.242959] do_syscall_64+0x3f/0x90 [ 42.243434] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 42.244088] RIP: 0033:0x7fd676741d82 [ 42.244557] 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 [ 42.246683] RSP: 002b:00007ffe9edff408 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 42.247596] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007fd676741d82 [ 42.248457] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007fd675b7b000 [ 42.249310] RBP: 00007fd675b7b000 R08: 0000000000000009 R09: 0000000000001000 [ 42.250164] R10: 0000000000000812 R11: 0000000000000206 R12: 000055b99e20b980 [ 42.251009] R13: 00007ffe9edff420 R14: 00007ffe9edff450 R15: 00007ffe9edff7b0 [ 42.251859] [ 42.252152] [ 42.252387] Allocated by task 213: [ 42.252820] kasan_save_stack+0x22/0x50 [ 42.253330] kasan_set_track+0x25/0x30 [ 42.253833] __kasan_slab_alloc+0x59/0x70 [ 42.254361] kmem_cache_alloc+0x16b/0x370 [ 42.254873] vm_area_dup+0x20/0x160 [ 42.255332] __split_vma+0x170/0x950 [ 42.255811] split_vma+0xc6/0x110 [ 42.256252] mprotect_fixup+0x8d2/0xb30 [ 42.256764] do_mprotect_pkey+0x87e/0xd40 [ 42.257287] __x64_sys_mprotect+0x78/0xc0 [ 42.257810] do_syscall_64+0x3f/0x90 [ 42.258290] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 42.258931] [ 42.259148] Freed by task 213: [ 42.259546] kasan_save_stack+0x22/0x50 [ 42.260049] kasan_set_track+0x25/0x30 [ 42.260560] kasan_save_free_info+0x2b/0x50 [ 42.261106] __kasan_slab_free+0x10a/0x190 [ 42.261638] kmem_cache_free+0x10d/0x4d0 [ 42.262148] rcu_core+0x8c8/0x2860 [ 42.262592] __do_softirq+0x1b7/0x7d4 [ 42.263089] [ 42.263313] Last potentially related work creation: [ 42.263905] kasan_save_stack+0x22/0x50 [ 42.264495] __kasan_record_aux_stack+0x8e/0xa0 [ 42.265080] __call_rcu_common.constprop.0+0x6a/0xb90 [ 42.265739] remove_vma+0x139/0x170 [ 42.266203] do_vmi_align_munmap+0xd4a/0x11f0 [ 42.266764] do_vmi_munmap+0x1f1/0x2b0 [ 42.267253] __vm_munmap+0x138/0x3a0 [ 42.267727] __x64_sys_munmap+0x59/0x80 [ 42.268230] do_syscall_64+0x3f/0x90 [ 42.268728] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 42.269365] [ 42.269582] The buggy address belongs to the object at ffff88800ef6e000 [ 42.269582] which belongs to the cache vm_area_struct of size 168 [ 42.271060] The buggy address is located 88 bytes inside of [ 42.271060] freed 168-byte region [ffff88800ef6e000, ffff88800ef6e0a8) [ 42.272503] [ 42.272721] The buggy address belongs to the physical page: [ 42.273376] page:000000003bd4b157 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xef6e [ 42.274469] memcg:ffff88800edfd201 [ 42.274896] anon flags: 0x100000000000200(slab|node=0|zone=1) [ 42.275600] page_type: 0xffffffff() [ 42.276059] raw: 0100000000000200 ffff88800879fc80 ffffea00003b6940 dead000000000003 [ 42.276993] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800edfd201 [ 42.277908] page dumped because: kasan: bad access detected [ 42.278569] [ 42.278785] Memory state around the buggy address: [ 42.279364] ffff88800ef6df00: 00 00 00 00 00 00 fc fc fc fc fc fc fc fc fc fc [ 42.280214] ffff88800ef6df80: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc [ 42.281080] >ffff88800ef6e000: fa fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 42.281932] ^ [ 42.282662] ffff88800ef6e080: fb fb fb fb fb fc fc fc fc fc fc fc fc 00 00 00 [ 42.283521] ffff88800ef6e100: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 42.284393] ================================================================== [ 42.285315] Disabling lock debugging due to kernel taint [ 44.157853] BUG: Bad rss-counter state mm:000000003f6ba2d2 type:MM_FILEPAGES val:33 [ 44.159090] BUG: Bad rss-counter state mm:000000003f6ba2d2 type:MM_ANONPAGES val:22 [ 44.593916] BUG: Bad rss-counter state mm:0000000065a33c8c type:MM_FILEPAGES val:33 [ 44.594875] BUG: Bad rss-counter state mm:0000000065a33c8c type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:25551' (ECDSA) to the list of known hosts. 2023/06/19 20:11:28 fuzzer started 2023/06/19 20:11:28 dialing manager at localhost:44161 2023/06/19 20:11:28 checking machine... 2023/06/19 20:11:28 checking revisions... [ 45.301405] kmemleak: Automatic memory scanning thread ended 2023/06/19 20:11:28 testing simple program... [ 45.342482] cgroup: Unknown subsys name 'net' [ 45.390186] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 20:11:17 Registers: info registers vcpu 0 RAX=1ffff110031f8f1d RBX=ffff888018fc78b8 RCX=ffffffff812e00e5 RDX=0000000000000000 RSI=0000000000000000 RDI=ffff888018fc78e8 RBP=ffff88801a1a7658 RSP=ffff88806ce09dd8 R8 =0000000000000001 R9 =ffffed100d9c13af R10=0000000000000003 R11=00000000000b6996 R12=dffffc0000000000 R13=ffff88801a1822e0 R14=ffffffff813782a8 R15=ffff88801a1822e0 RIP=ffffffff8184636c RFL=00000046 [---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 00007f4b3d782900 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=00007ffd49ed6000 CR3=000000000d98e000 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=ffff88806cf35000 RBX=0000000000000001 RCX=ffffffff8450c50e RDX=ffffed100d9e6a01 RSI=0000000000000004 RDI=ffffffff812889a5 RBP=dffffc0000000000 RSP=ffff888008e27e70 R8 =0000000000000000 R9 =ffffed100d9e6a00 R10=ffff88806cf35003 R11=ffff888008c58400 R12=ffffffff85d3bed0 R13=1ffff110011c4fd3 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 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=00007ff4d985b1e0 CR3=000000000c95a000 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=4cb9b79f96a937a5fe44fa2aa24007cc XMM02=000000000011d850eff9b2d0a8fce9cb XMM03=000000000011d9202c67c8bc2e329bc3 XMM04=e665f017525c887d00000000000ae988 XMM05=19e9129bd510f23500000000001344f0 XMM06=bc49b335535f92e70000000000133358 XMM07=e042d86d42eb936e0000000000124c68 XMM08=264d4a4243dab9ba000000000011d920 XMM09=00000000000000000000000000000000 XMM10=20200000000020202020202020200000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000