syzkaller login: [ 30.198014] BUG: Bad rss-counter state mm:00000000339d3a92 type:MM_FILEPAGES val:33 [ 30.199110] BUG: Bad rss-counter state mm:00000000339d3a92 type:MM_ANONPAGES val:22 [ 30.355565] ================================================================== [ 30.356559] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 30.357559] Read of size 8 at addr ffff888016b20c20 by task sshd/221 [ 30.358547] [ 30.358784] CPU: 1 PID: 221 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 30.359700] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 30.360938] Call Trace: [ 30.361353] [ 30.361715] dump_stack_lvl+0x91/0xf0 [ 30.362339] print_report+0xcc/0x620 [ 30.362870] ? __virt_addr_valid+0x102/0x340 [ 30.363456] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.364109] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.364792] kasan_report+0xbe/0xf0 [ 30.365302] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.365990] vma_interval_tree_remove+0xc75/0xec0 [ 30.366674] vma_prepare+0xc54/0x11a0 [ 30.367202] __split_vma+0x5af/0x950 [ 30.367724] ? __pfx___split_vma+0x10/0x10 [ 30.368346] ? find_held_lock+0x2c/0x110 [ 30.368932] do_vmi_align_munmap+0x2ba/0x11f0 [ 30.369555] ? lock_is_held_type+0x9f/0x120 [ 30.370170] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 30.370849] ? mtree_range_walk+0x632/0x900 [ 30.371456] ? mas_walk+0x5c7/0x7c0 [ 30.371981] do_vmi_munmap+0x1f1/0x2b0 [ 30.372563] mmap_region+0x1f9/0x2660 [ 30.373094] ? vm_mmap_pgoff+0x15c/0x3a0 [ 30.373670] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 30.374477] ? __pfx_lock_acquire+0x10/0x10 [ 30.375067] ? __pfx_mmap_region+0x10/0x10 [ 30.375653] ? security_mmap_addr+0x7d/0xa0 [ 30.376260] ? get_unmapped_area+0x1f5/0x3f0 [ 30.376907] do_mmap+0x854/0xf00 [ 30.377392] vm_mmap_pgoff+0x1a6/0x3a0 [ 30.377937] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 30.378576] ksys_mmap_pgoff+0x3af/0x500 [ 30.379139] do_syscall_64+0x3f/0x90 [ 30.379676] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.380431] RIP: 0033:0x7fd612d94d82 [ 30.380936] 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 [ 30.383306] RSP: 002b:00007ffe8dbe8108 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 30.384328] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007fd612d94d82 [ 30.385275] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007fd6121ce000 [ 30.386222] RBP: 00007fd6121ce000 R08: 0000000000000009 R09: 0000000000001000 [ 30.387163] R10: 0000000000000812 R11: 0000000000000206 R12: 000055956d94fec0 [ 30.388120] R13: 00007ffe8dbe8120 R14: 00007ffe8dbe8150 R15: 00007ffe8dbe84b0 [ 30.389108] [ 30.389431] [ 30.389672] Allocated by task 214: [ 30.390154] kasan_save_stack+0x22/0x50 [ 30.390709] kasan_set_track+0x25/0x30 [ 30.391252] __kasan_slab_alloc+0x59/0x70 [ 30.391842] kmem_cache_alloc+0x16b/0x370 [ 30.392428] vm_area_dup+0x20/0x160 [ 30.392938] __split_vma+0x170/0x950 [ 30.393453] split_vma+0xc6/0x110 [ 30.393940] mprotect_fixup+0x8d2/0xb30 [ 30.394508] do_mprotect_pkey+0x87e/0xd40 [ 30.395085] __x64_sys_mprotect+0x78/0xc0 [ 30.395666] do_syscall_64+0x3f/0x90 [ 30.396200] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.396946] [ 30.397188] Freed by task 61: [ 30.397615] kasan_save_stack+0x22/0x50 [ 30.398189] kasan_set_track+0x25/0x30 [ 30.398737] kasan_save_free_info+0x2b/0x50 [ 30.399326] __kasan_slab_free+0x10a/0x190 [ 30.399911] kmem_cache_free+0x10d/0x4d0 [ 30.400506] rcu_core+0x8c8/0x2860 [ 30.400999] __do_softirq+0x1b7/0x7d4 [ 30.401535] [ 30.401770] Last potentially related work creation: [ 30.402431] kasan_save_stack+0x22/0x50 [ 30.402982] __kasan_record_aux_stack+0x8e/0xa0 [ 30.403613] __call_rcu_common.constprop.0+0x6a/0xb90 [ 30.404345] remove_vma+0x139/0x170 [ 30.404842] do_vmi_align_munmap+0xd4a/0x11f0 [ 30.405452] do_vmi_munmap+0x1f1/0x2b0 [ 30.405997] __vm_munmap+0x138/0x3a0 [ 30.406534] __x64_sys_munmap+0x59/0x80 [ 30.407087] do_syscall_64+0x3f/0x90 [ 30.407617] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.408358] [ 30.408596] The buggy address belongs to the object at ffff888016b20bc8 [ 30.408596] which belongs to the cache vm_area_struct of size 168 [ 30.410257] The buggy address is located 88 bytes inside of [ 30.410257] freed 168-byte region [ffff888016b20bc8, ffff888016b20c70) [ 30.411821] [ 30.412058] The buggy address belongs to the physical page: [ 30.412816] page:00000000b7d9d336 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x16b20 [ 30.414033] memcg:ffff88800ea52901 [ 30.414523] flags: 0x100000000000200(slab|node=0|zone=1) [ 30.415237] page_type: 0xffffffff() [ 30.415746] raw: 0100000000000200 ffff8880087a0c80 dead000000000122 0000000000000000 [ 30.416795] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800ea52901 [ 30.417805] page dumped because: kasan: bad access detected [ 30.418557] [ 30.418795] Memory state around the buggy address: [ 30.419436] ffff888016b20b00: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 30.420427] ffff888016b20b80: 00 fc fc fc fc fc fc fc fc fa fb fb fb fb fb fb [ 30.421373] >ffff888016b20c00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fc fc [ 30.422332] ^ [ 30.422918] ffff888016b20c80: fc fc fc fc fc fc fa fb fb fb fb fb fb fb fb fb [ 30.423863] ffff888016b20d00: fb fb fb fb fb fb fb fb fb fb fb fc fc fc fc fc [ 30.424838] ================================================================== [ 30.426252] Disabling lock debugging due to kernel taint [ 32.478497] BUG: Bad rss-counter state mm:00000000044f67eb type:MM_FILEPAGES val:33 [ 32.480853] BUG: Bad rss-counter state mm:00000000044f67eb type:MM_ANONPAGES val:22 [ 32.976471] BUG: Bad rss-counter state mm:0000000076b607bd type:MM_FILEPAGES val:33 [ 32.977687] BUG: Bad rss-counter state mm:0000000076b607bd type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:2601' (ECDSA) to the list of known hosts. 2023/06/21 08:28:47 fuzzer started 2023/06/21 08:28:48 dialing manager at localhost:36067 2023/06/21 08:28:48 checking machine... 2023/06/21 08:28:48 checking revisions... [ 33.753484] kmemleak: Automatic memory scanning thread ended 2023/06/21 08:28:48 testing simple program... [ 33.810106] cgroup: Unknown subsys name 'net' [ 33.865227] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 08:28:47 Registers: info registers vcpu 0 RAX=dffffc0000000000 RBX=0000000000000001 RCX=ffffffff86138f52 RDX=1ffff11002c55f44 RSI=0000000000000001 RDI=0000000000000001 RBP=ffff8880162afa30 RSP=ffff8880162af968 R8 =ffffffff86138f56 R9 =ffff8880162afa18 R10=0000000000038001 R11=0000000000020db7 R12=ffff8880162afa38 R13=ffff8880162afa20 R14=0000000000000005 R15=ffff8880162af9d8 RIP=ffffffff81130b54 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 =0000 0000000000000000 00000000 00000000 DS =0000 0000000000000000 00000000 00000000 FS =0000 00007f899f9f5900 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=00007fff7e0c3000 CR3=000000000efe8000 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=635f6e6f69737365733a4d41503d706f XMM01=6f6c5f6d61702c78756e696c65735f6d XMM02=61702c74696d7265705f6d61702c7469 XMM03=655f6d61702c7374696d696c5f6d6170 XMM04=3d6c616e696d72657420322e322e302e XMM05=3d656d616e74736f682022646873732f XMM06=746f6f72223d746363612078756e696c XMM07=6e655f6d61702c7374696d696c5f6d61 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=00007f2b2b914ab0 CR3=0000000009806000 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=03af2d6945e640a782424b90dfd6a0a8 XMM02=0000000000119e50eff9b2d0a8fce9cb XMM03=0000000000119f202c67c8bc2e329bc3 XMM04=6e6d385f92e8463a00000000000ae988 XMM05=e4cb8bb95a7664b600000000001311c0 XMM06=a0771fd9fe36323a0000000000130028 XMM07=e042d86d42eb936e0000000000121310 XMM08=064aad2453fdb2580000000000119f20 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000