syzkaller login: [ 30.637745] BUG: Bad rss-counter state mm:000000005a82cf06 type:MM_FILEPAGES val:33 [ 30.639093] BUG: Bad rss-counter state mm:000000005a82cf06 type:MM_ANONPAGES val:22 [ 30.815117] ================================================================== [ 30.816014] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 30.816974] Read of size 8 at addr ffff88800ed60df0 by task sshd/220 [ 30.817739] [ 30.817961] CPU: 0 PID: 220 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 30.818905] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 30.819888] Call Trace: [ 30.820207] [ 30.820531] dump_stack_lvl+0x91/0xf0 [ 30.821050] print_report+0xcc/0x620 [ 30.821535] ? __virt_addr_valid+0x102/0x340 [ 30.822090] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.822700] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.823326] kasan_report+0xbe/0xf0 [ 30.823800] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.824438] vma_interval_tree_remove+0xc75/0xec0 [ 30.825035] vma_prepare+0xc54/0x11a0 [ 30.825516] __split_vma+0x5af/0x950 [ 30.825981] ? __pfx___split_vma+0x10/0x10 [ 30.826506] ? find_held_lock+0x2c/0x110 [ 30.827030] do_vmi_align_munmap+0x2ba/0x11f0 [ 30.827591] ? lock_is_held_type+0x9f/0x120 [ 30.828127] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 30.828740] ? mtree_range_walk+0x632/0x900 [ 30.829289] ? mas_walk+0x5c7/0x7c0 [ 30.829768] do_vmi_munmap+0x1f1/0x2b0 [ 30.830261] mmap_region+0x1f9/0x2660 [ 30.830741] ? vm_mmap_pgoff+0x15c/0x3a0 [ 30.831248] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 30.831955] ? __pfx_lock_acquire+0x10/0x10 [ 30.832507] ? __pfx_mmap_region+0x10/0x10 [ 30.833040] ? security_mmap_addr+0x7d/0xa0 [ 30.833568] ? get_unmapped_area+0x1f5/0x3f0 [ 30.834115] do_mmap+0x854/0xf00 [ 30.834550] vm_mmap_pgoff+0x1a6/0x3a0 [ 30.835041] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 30.835601] ksys_mmap_pgoff+0x3af/0x500 [ 30.836104] do_syscall_64+0x3f/0x90 [ 30.836595] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.837245] RIP: 0033:0x7fdb06f30d82 [ 30.837699] 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 [ 30.839815] RSP: 002b:00007ffc676b5ce8 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 30.840729] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007fdb06f30d82 [ 30.841570] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007fdb0636a000 [ 30.842402] RBP: 00007fdb0636a000 R08: 0000000000000009 R09: 0000000000001000 [ 30.843234] R10: 0000000000000812 R11: 0000000000000206 R12: 000056485f93cb20 [ 30.844072] R13: 00007ffc676b5d00 R14: 00007ffc676b5d30 R15: 00007ffc676b6090 [ 30.844933] [ 30.845219] [ 30.845435] Allocated by task 213: [ 30.845855] kasan_save_stack+0x22/0x50 [ 30.846354] kasan_set_track+0x25/0x30 [ 30.846846] __kasan_slab_alloc+0x59/0x70 [ 30.847368] kmem_cache_alloc+0x16b/0x370 [ 30.847874] vm_area_dup+0x20/0x160 [ 30.848345] __split_vma+0x170/0x950 [ 30.848812] split_vma+0xc6/0x110 [ 30.849248] mprotect_fixup+0x8d2/0xb30 [ 30.849749] do_mprotect_pkey+0x87e/0xd40 [ 30.850267] __x64_sys_mprotect+0x78/0xc0 [ 30.850788] do_syscall_64+0x3f/0x90 [ 30.851259] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.851893] [ 30.852108] Freed by task 203: [ 30.852503] kasan_save_stack+0x22/0x50 [ 30.853007] kasan_set_track+0x25/0x30 [ 30.853495] kasan_save_free_info+0x2b/0x50 [ 30.854027] __kasan_slab_free+0x10a/0x190 [ 30.854558] kmem_cache_free+0x10d/0x4d0 [ 30.855066] rcu_core+0x8c8/0x2860 [ 30.855509] __do_softirq+0x1b7/0x7d4 [ 30.855985] [ 30.856197] Last potentially related work creation: [ 30.856792] kasan_save_stack+0x22/0x50 [ 30.857296] __kasan_record_aux_stack+0x8e/0xa0 [ 30.857865] __call_rcu_common.constprop.0+0x6a/0xb90 [ 30.858509] remove_vma+0x139/0x170 [ 30.858963] do_vmi_align_munmap+0xd4a/0x11f0 [ 30.859518] do_vmi_munmap+0x1f1/0x2b0 [ 30.860004] __vm_munmap+0x138/0x3a0 [ 30.860484] __x64_sys_munmap+0x59/0x80 [ 30.860975] do_syscall_64+0x3f/0x90 [ 30.861448] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.862087] [ 30.862304] The buggy address belongs to the object at ffff88800ed60d98 [ 30.862304] which belongs to the cache vm_area_struct of size 168 [ 30.863752] The buggy address is located 88 bytes inside of [ 30.863752] freed 168-byte region [ffff88800ed60d98, ffff88800ed60e40) [ 30.865165] [ 30.865383] The buggy address belongs to the physical page: [ 30.866052] page:00000000e041db4a refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xed60 [ 30.867125] memcg:ffff88800d63a701 [ 30.867551] flags: 0x100000000000200(slab|node=0|zone=1) [ 30.868192] page_type: 0xffffffff() [ 30.868648] raw: 0100000000000200 ffff8880087a0c80 dead000000000122 0000000000000000 [ 30.869560] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800d63a701 [ 30.870466] page dumped because: kasan: bad access detected [ 30.871121] [ 30.871337] Memory state around the buggy address: [ 30.871909] ffff88800ed60c80: fc fc fc fc fc fc 00 00 00 00 00 00 00 00 00 00 [ 30.872779] ffff88800ed60d00: 00 00 00 00 00 00 00 00 00 00 00 fc fc fc fc fc [ 30.873629] >ffff88800ed60d80: fc fc fc fa fb fb fb fb fb fb fb fb fb fb fb fb [ 30.874469] ^ [ 30.875264] ffff88800ed60e00: fb fb fb fb fb fb fb fb fc fc fc fc fc fc fc fc [ 30.876106] ffff88800ed60e80: fa fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 30.876958] ================================================================== [ 30.877908] Disabling lock debugging due to kernel taint [ 32.381960] BUG: Bad rss-counter state mm:00000000bf3e2ceb type:MM_FILEPAGES val:33 [ 32.382688] BUG: Bad rss-counter state mm:00000000bf3e2ceb type:MM_ANONPAGES val:22 [ 32.747707] BUG: Bad rss-counter state mm:00000000e510364b type:MM_FILEPAGES val:33 [ 32.748279] BUG: Bad rss-counter state mm:00000000e510364b type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:31583' (ECDSA) to the list of known hosts. 2023/06/21 03:38:17 fuzzer started 2023/06/21 03:38:17 dialing manager at localhost:36067 2023/06/21 03:38:17 checking machine... 2023/06/21 03:38:17 checking revisions... [ 33.400101] kmemleak: Automatic memory scanning thread ended 2023/06/21 03:38:17 testing simple program... [ 33.441564] cgroup: Unknown subsys name 'net' [ 33.483309] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 03:38:17 Registers: info registers vcpu 0 RAX=0000000000000000 RBX=ffffffff85652c60 RCX=0000000000000000 RDX=ffff88800f48b680 RSI=ffffffff814c8471 RDI=ffff88800f48ba74 RBP=00007f2c5da65e07 RSP=ffff88801465f0e8 R8 =0000000000000000 R9 =0000000000000000 R10=ffffffff85d3d357 R11=00000000000b6a61 R12=00007f2c5da65e07 R13=0000000000000000 R14=ffff88800f48b680 R15=ffff888016628be0 RIP=ffffffff814c8474 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 00007f2c5ced3900 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=000055f2e7d17380 CR3=000000000d896000 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=652022746f6f72223d74636361207469 XMM02=3d6c616e696d72657420322e322e302e XMM03=3d656d616e74736f682022646873732f XMM04=40404040404040404040404040404040 XMM05=5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a XMM06=20202020202020202020202020202020 XMM07=00000000000000000000000000000000 XMM08=652075253d64692073253d706f000000 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=00007f68aada5ff0 CR3=000000000d756000 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=38f76ee388f599bbca46501854b2dfae XMM02=ec2efd57dc4c00df000000000011b040 XMM03=8c5f84cfad2dd21e000000000011b110 XMM04=160ab8ec9583135c00000000000ae988 XMM05=252608a03431050a0000000000131d28 XMM06=4fda316b135da52b0000000000131720 XMM07=e042d86d42eb936e0000000000121c30 XMM08=8c5f84cfad2dd21e000000000011b110 XMM09=00000000000000000000000000000000 XMM10=20200000000020202020202020200000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000