syzkaller login: [ 30.338586] BUG: Bad rss-counter state mm:000000003b906447 type:MM_FILEPAGES val:33 [ 30.339791] BUG: Bad rss-counter state mm:000000003b906447 type:MM_ANONPAGES val:22 [ 30.380793] ================================================================== [ 30.381811] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 30.382850] Read of size 8 at addr ffff888019d165c8 by task sshd/220 [ 30.383763] [ 30.383984] CPU: 1 PID: 220 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 30.385021] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 30.385979] Call Trace: [ 30.386303] [ 30.386594] dump_stack_lvl+0x91/0xf0 [ 30.387083] print_report+0xcc/0x620 [ 30.387588] ? __virt_addr_valid+0x102/0x340 [ 30.388140] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.388761] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.389376] kasan_report+0xbe/0xf0 [ 30.389853] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.390479] vma_interval_tree_remove+0xc75/0xec0 [ 30.391075] vma_prepare+0xc54/0x11a0 [ 30.391625] __split_vma+0x5af/0x950 [ 30.392159] ? __pfx___split_vma+0x10/0x10 [ 30.392751] ? find_held_lock+0x2c/0x110 [ 30.393327] do_vmi_align_munmap+0x2ba/0x11f0 [ 30.393963] ? lock_is_held_type+0x9f/0x120 [ 30.394562] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 30.395239] ? mtree_range_walk+0x632/0x900 [ 30.395889] ? mas_walk+0x5c7/0x7c0 [ 30.396423] do_vmi_munmap+0x1f1/0x2b0 [ 30.396965] mmap_region+0x1f9/0x2660 [ 30.397511] ? vm_mmap_pgoff+0x15c/0x3a0 [ 30.398092] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 30.398873] ? __pfx_lock_acquire+0x10/0x10 [ 30.399468] ? __pfx_mmap_region+0x10/0x10 [ 30.400064] ? security_mmap_addr+0x7d/0xa0 [ 30.400650] ? get_unmapped_area+0x1f5/0x3f0 [ 30.401267] do_mmap+0x854/0xf00 [ 30.401743] vm_mmap_pgoff+0x1a6/0x3a0 [ 30.402302] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 30.402931] ksys_mmap_pgoff+0x3af/0x500 [ 30.403486] do_syscall_64+0x3f/0x90 [ 30.404034] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.404742] RIP: 0033:0x7ff35b1fbd82 [ 30.405238] 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 [ 30.407664] RSP: 002b:00007ffd75494508 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 30.408688] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007ff35b1fbd82 [ 30.409654] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007ff35a635000 [ 30.410587] RBP: 00007ff35a635000 R08: 0000000000000009 R09: 0000000000001000 [ 30.411539] R10: 0000000000000812 R11: 0000000000000206 R12: 000055ac36ac7f70 [ 30.412503] R13: 00007ffd75494520 R14: 00007ffd75494550 R15: 00007ffd754948b0 [ 30.413478] [ 30.413812] [ 30.414049] Allocated by task 213: [ 30.414527] kasan_save_stack+0x22/0x50 [ 30.415087] kasan_set_track+0x25/0x30 [ 30.415658] __kasan_slab_alloc+0x59/0x70 [ 30.416233] kmem_cache_alloc+0x16b/0x370 [ 30.416812] vm_area_dup+0x20/0x160 [ 30.417309] __split_vma+0x170/0x950 [ 30.417837] split_vma+0xc6/0x110 [ 30.418335] mprotect_fixup+0x8d2/0xb30 [ 30.418899] do_mprotect_pkey+0x87e/0xd40 [ 30.419482] __x64_sys_mprotect+0x78/0xc0 [ 30.420069] do_syscall_64+0x3f/0x90 [ 30.420593] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.421290] [ 30.421535] Freed by task 213: [ 30.421981] kasan_save_stack+0x22/0x50 [ 30.422536] kasan_set_track+0x25/0x30 [ 30.423086] kasan_save_free_info+0x2b/0x50 [ 30.423720] __kasan_slab_free+0x10a/0x190 [ 30.424310] kmem_cache_free+0x10d/0x4d0 [ 30.424985] rcu_core+0x8c8/0x2860 [ 30.425493] __do_softirq+0x1b7/0x7d4 [ 30.426013] [ 30.426255] Last potentially related work creation: [ 30.426931] kasan_save_stack+0x22/0x50 [ 30.427494] __kasan_record_aux_stack+0x8e/0xa0 [ 30.428120] __call_rcu_common.constprop.0+0x6a/0xb90 [ 30.428831] remove_vma+0x139/0x170 [ 30.429341] do_vmi_align_munmap+0xd4a/0x11f0 [ 30.429969] do_vmi_munmap+0x1f1/0x2b0 [ 30.430499] __vm_munmap+0x138/0x3a0 [ 30.431027] __x64_sys_munmap+0x59/0x80 [ 30.431598] do_syscall_64+0x3f/0x90 [ 30.432132] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.432860] [ 30.433100] The buggy address belongs to the object at ffff888019d16570 [ 30.433100] which belongs to the cache vm_area_struct of size 168 [ 30.434744] The buggy address is located 88 bytes inside of [ 30.434744] freed 168-byte region [ffff888019d16570, ffff888019d16618) [ 30.436377] [ 30.436613] The buggy address belongs to the physical page: [ 30.437367] page:00000000c505d494 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x19d16 [ 30.438594] memcg:ffff88800eb49501 [ 30.439067] flags: 0x100000000000200(slab|node=0|zone=1) [ 30.439806] page_type: 0xffffffff() [ 30.440311] raw: 0100000000000200 ffff8880087a0c80 dead000000000122 0000000000000000 [ 30.441349] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800eb49501 [ 30.442360] page dumped because: kasan: bad access detected [ 30.443107] [ 30.443342] Memory state around the buggy address: [ 30.444021] ffff888019d16480: fc 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 30.444982] ffff888019d16500: 00 00 00 00 00 00 fc fc fc fc fc fc fc fc fa fb [ 30.445935] >ffff888019d16580: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 30.446889] ^ [ 30.447638] ffff888019d16600: fb fb fb fc fc fc fc fc fc fc fc fa fb fb fb fb [ 30.448588] ffff888019d16680: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 30.449540] ================================================================== [ 30.450611] Disabling lock debugging due to kernel taint [ 33.189512] BUG: Bad rss-counter state mm:00000000edb404df type:MM_FILEPAGES val:33 [ 33.190791] BUG: Bad rss-counter state mm:00000000edb404df type:MM_ANONPAGES val:22 [ 33.607764] BUG: Bad rss-counter state mm:000000004a2d5280 type:MM_FILEPAGES val:33 [ 33.608823] BUG: Bad rss-counter state mm:000000004a2d5280 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:10998' (ECDSA) to the list of known hosts. 2023/06/20 16:06:50 fuzzer started 2023/06/20 16:06:50 dialing manager at localhost:36067 2023/06/20 16:06:50 checking machine... 2023/06/20 16:06:50 checking revisions... [ 34.260798] kmemleak: Automatic memory scanning thread ended 2023/06/20 16:06:50 testing simple program... [ 34.305166] cgroup: Unknown subsys name 'net' [ 34.369792] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 16:06:50 Registers: info registers vcpu 0 RAX=ffffffff8460144a RBX=ffffffff813ad470 RCX=0000000000000001 RDX=1ffff1100d9c135e RSI=ffffffff8460144a RDI=ffff88806ce09b60 RBP=ffff88806ce09b30 RSP=ffff88806ce09a90 R8 =0000000000000001 R9 =ffff88806ce09ad8 R10=0000000000038001 R11=00000000000b5305 R12=ffff88806ce09b60 R13=0000000000000000 R14=ffffffff8542a6c0 R15=ffff88800d81ed90 RIP=ffffffff84538440 RFL=00000282 [--S----] 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 0000000000000000 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=00007f1a3cd64f40 CR3=000000000e1f6000 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=2030353a36303a3631203032206e754a XMM01=73732878696e755f6d6170203a5d3932 XMM02=65736f6c63206e6f6973736573203a29 XMM03=755f6d6170203a5d3932325b64687373 XMM04=69662068637573206f4e203a656c6163 XMM05=3a656c696620766e65206e65706f206f XMM06=65733a6468737328766e655f6d617020 XMM07=6b7a79732039343a36303a3631203032 XMM08=3d656e696c646d632022656369767265 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=dffffc0000000000 RBX=0000000000000000 RCX=0000000000000000 RDX=0000000000000000 RSI=ffffffff814c857a RDI=ffff88800f473a74 RBP=ffff88800f473680 RSP=ffff888019b5f0b8 R8 =0000000000000005 R9 =0000000000000000 R10=0000000000000000 R11=00000000000b6a61 R12=0000000000000000 R13=0000000000000000 R14=ffffffff85652d08 R15=ffff88800e6a3390 RIP=ffffffff813744e1 RFL=00000217 [----APC] 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 00007f37c3840900 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=00007f37c3805008 CR3=000000000f180000 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=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