syzkaller login: [ 30.605693] BUG: Bad rss-counter state mm:0000000027c7f9f0 type:MM_FILEPAGES val:33 [ 30.606767] BUG: Bad rss-counter state mm:0000000027c7f9f0 type:MM_ANONPAGES val:22 [ 30.782294] ================================================================== [ 30.783495] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 30.784724] Read of size 8 at addr ffff8880169cbdf0 by task sshd/220 [ 30.785714] [ 30.785993] CPU: 1 PID: 220 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 30.787123] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 30.788408] Call Trace: [ 30.788817] [ 30.789186] dump_stack_lvl+0x91/0xf0 [ 30.789834] print_report+0xcc/0x620 [ 30.790461] ? __virt_addr_valid+0x102/0x340 [ 30.791184] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.792022] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.792851] kasan_report+0xbe/0xf0 [ 30.793477] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.794305] vma_interval_tree_remove+0xc75/0xec0 [ 30.795113] vma_prepare+0xc54/0x11a0 [ 30.795754] __split_vma+0x5af/0x950 [ 30.796409] ? __pfx___split_vma+0x10/0x10 [ 30.797114] ? find_held_lock+0x2c/0x110 [ 30.797798] do_vmi_align_munmap+0x2ba/0x11f0 [ 30.798555] ? lock_is_held_type+0x9f/0x120 [ 30.799279] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 30.800101] ? mtree_range_walk+0x632/0x900 [ 30.800842] ? mas_walk+0x5c7/0x7c0 [ 30.801488] do_vmi_munmap+0x1f1/0x2b0 [ 30.802155] mmap_region+0x1f9/0x2660 [ 30.802818] ? vm_mmap_pgoff+0x15c/0x3a0 [ 30.803525] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 30.804381] ? __pfx_lock_acquire+0x10/0x10 [ 30.804943] ? __pfx_mmap_region+0x10/0x10 [ 30.805498] ? security_mmap_addr+0x7d/0xa0 [ 30.806048] ? get_unmapped_area+0x1f5/0x3f0 [ 30.806603] do_mmap+0x854/0xf00 [ 30.807047] vm_mmap_pgoff+0x1a6/0x3a0 [ 30.807556] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 30.808151] ksys_mmap_pgoff+0x3af/0x500 [ 30.808673] do_syscall_64+0x3f/0x90 [ 30.809159] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.809824] RIP: 0033:0x7ff64ef39d82 [ 30.810287] 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 [ 30.812486] RSP: 002b:00007fffee8198f8 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 30.813401] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007ff64ef39d82 [ 30.814266] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007ff64e373000 [ 30.815133] RBP: 00007ff64e373000 R08: 0000000000000009 R09: 0000000000001000 [ 30.816017] R10: 0000000000000812 R11: 0000000000000206 R12: 00005562545d6b20 [ 30.816891] R13: 00007fffee819910 R14: 00007fffee819940 R15: 00007fffee819ca0 [ 30.817774] [ 30.818080] [ 30.818304] Allocated by task 213: [ 30.818740] kasan_save_stack+0x22/0x50 [ 30.819258] kasan_set_track+0x25/0x30 [ 30.819768] __kasan_slab_alloc+0x59/0x70 [ 30.820314] kmem_cache_alloc+0x16b/0x370 [ 30.820838] vm_area_dup+0x20/0x160 [ 30.821341] __split_vma+0x170/0x950 [ 30.821824] split_vma+0xc6/0x110 [ 30.822273] mprotect_fixup+0x8d2/0xb30 [ 30.822779] do_mprotect_pkey+0x87e/0xd40 [ 30.823309] __x64_sys_mprotect+0x78/0xc0 [ 30.823839] do_syscall_64+0x3f/0x90 [ 30.824348] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.825005] [ 30.825227] Freed by task 19: [ 30.825615] kasan_save_stack+0x22/0x50 [ 30.826124] kasan_set_track+0x25/0x30 [ 30.826624] kasan_save_free_info+0x2b/0x50 [ 30.827168] __kasan_slab_free+0x10a/0x190 [ 30.827713] kmem_cache_free+0x10d/0x4d0 [ 30.828242] rcu_core+0x8c8/0x2860 [ 30.828689] __do_softirq+0x1b7/0x7d4 [ 30.829180] [ 30.829402] Last potentially related work creation: [ 30.830000] kasan_save_stack+0x22/0x50 [ 30.830513] __kasan_record_aux_stack+0x8e/0xa0 [ 30.831096] __call_rcu_common.constprop.0+0x6a/0xb90 [ 30.831750] remove_vma+0x139/0x170 [ 30.832215] do_vmi_align_munmap+0xd4a/0x11f0 [ 30.832779] do_vmi_munmap+0x1f1/0x2b0 [ 30.833269] __vm_munmap+0x138/0x3a0 [ 30.833742] __x64_sys_munmap+0x59/0x80 [ 30.834247] do_syscall_64+0x3f/0x90 [ 30.834727] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.835385] [ 30.835600] The buggy address belongs to the object at ffff8880169cbd98 [ 30.835600] which belongs to the cache vm_area_struct of size 168 [ 30.837106] The buggy address is located 88 bytes inside of [ 30.837106] freed 168-byte region [ffff8880169cbd98, ffff8880169cbe40) [ 30.838565] [ 30.838785] The buggy address belongs to the physical page: [ 30.839467] page:00000000009b7fd1 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x169cb [ 30.840587] memcg:ffff888016800901 [ 30.841025] flags: 0x100000000000200(slab|node=0|zone=1) [ 30.841678] page_type: 0xffffffff() [ 30.842139] raw: 0100000000000200 ffff8880087a0c80 dead000000000122 0000000000000000 [ 30.843074] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff888016800901 [ 30.843994] page dumped because: kasan: bad access detected [ 30.844662] [ 30.844883] Memory state around the buggy address: [ 30.845472] ffff8880169cbc80: fc fc fc fc fc fc 00 00 00 00 00 00 00 00 00 00 [ 30.846346] ffff8880169cbd00: 00 00 00 00 00 00 00 00 00 00 00 fc fc fc fc fc [ 30.847216] >ffff8880169cbd80: fc fc fc fa fb fb fb fb fb fb fb fb fb fb fb fb [ 30.848099] ^ [ 30.848936] ffff8880169cbe00: fb fb fb fb fb fb fb fb fc fc fc fc fc fc fc fc [ 30.849824] ffff8880169cbe80: fa fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 30.850698] ================================================================== [ 30.851711] Disabling lock debugging due to kernel taint [ 33.180271] BUG: Bad rss-counter state mm:00000000d919b02d type:MM_FILEPAGES val:33 [ 33.181481] BUG: Bad rss-counter state mm:00000000d919b02d type:MM_ANONPAGES val:22 [ 33.658213] BUG: Bad rss-counter state mm:00000000dd62b575 type:MM_FILEPAGES val:33 [ 33.659456] BUG: Bad rss-counter state mm:00000000dd62b575 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:4935' (ECDSA) to the list of known hosts. 2023/06/20 10:59:35 fuzzer started 2023/06/20 10:59:35 dialing manager at localhost:36067 2023/06/20 10:59:35 checking machine... 2023/06/20 10:59:35 checking revisions... [ 34.367746] kmemleak: Automatic memory scanning thread ended 2023/06/20 10:59:35 testing simple program... [ 34.413119] cgroup: Unknown subsys name 'net' [ 34.449611] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 10:59:35 Registers: info registers vcpu 0 RAX=0000000000038000 RBX=0000000000000001 RCX=ffffffff818dfcf7 RDX=dffffc0000000000 RSI=0000000000008dfc RDI=ffff88801467f620 RBP=ffff88801467f678 RSP=ffff88801467f5b0 R8 =0000000000000001 R9 =ffff88801467f660 R10=0000000000038001 R11=000000000002454d R12=ffff88801467f680 R13=ffff88801467f668 R14=ffff88801467f661 R15=ffff88801467f620 RIP=ffffffff81130754 RFL=00000287 [--S--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 =0000 0000000000000000 00000000 00000000 DS =0000 0000000000000000 00000000 00000000 FS =0000 00007f145815a900 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=00007f1457594950 CR3=000000000f1f0000 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=454d49544c4145525f454352554f535f XMM01=3d504d415453454d49545f454d49544c XMM02=ffffffffffffffffffffffffffffffff XMM03=2f6c616e72756f6a2f676f6c2f6e7572 XMM04=4f5345d81e4d77c300000000000ae988 XMM05=d6613dbe6f3f16020000000000133408 XMM06=e4cb8bb95a7664b600000000001322a0 XMM07=00000000000000000000000000000000 XMM08=415453454d49545f454d49544c414552 XMM09=00000000000000000000000000000000 XMM10=20200000000020202020202020200000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=0000000000000001 RBX=ffff88806cf35000 RCX=ffffffff812d86ea RDX=0000000000000000 RSI=0000000000000008 RDI=ffffffff85d3d350 RBP=1ffff11001df6fad RSP=ffff88800efb7d48 R8 =0000000000000000 R9 =fffffbfff0ba7a6a R10=ffffffff85d3d357 R11=00000000000b6a61 R12=ffffffff8560b640 R13=ffffffff83639d07 R14=ffff8880191ce1c0 R15=0000000000000000 RIP=ffffffff8135b980 RFL=00000286 [--S--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 00007fbb7b42b900 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=00007ffdb36a9000 CR3=000000000e65a000 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