syzkaller login: [ 38.680829] BUG: Bad rss-counter state mm:00000000ac1dd7e2 type:MM_FILEPAGES val:33 [ 38.682659] BUG: Bad rss-counter state mm:00000000ac1dd7e2 type:MM_ANONPAGES val:22 [ 38.844878] ================================================================== [ 38.845941] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 38.847040] Read of size 8 at addr ffff8880098ec5c8 by task sshd/218 [ 38.848089] [ 38.848313] CPU: 1 PID: 218 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 38.849120] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 38.850052] Call Trace: [ 38.850351] [ 38.850623] dump_stack_lvl+0x91/0xf0 [ 38.851092] print_report+0xcc/0x620 [ 38.851548] ? __virt_addr_valid+0x102/0x340 [ 38.852063] ? vma_interval_tree_remove+0xc75/0xec0 [ 38.852642] ? vma_interval_tree_remove+0xc75/0xec0 [ 38.853220] kasan_report+0xbe/0xf0 [ 38.853667] ? vma_interval_tree_remove+0xc75/0xec0 [ 38.854260] vma_interval_tree_remove+0xc75/0xec0 [ 38.854850] vma_prepare+0xc54/0x11a0 [ 38.855327] __split_vma+0x5af/0x950 [ 38.855793] ? __pfx___split_vma+0x10/0x10 [ 38.856315] ? find_held_lock+0x2c/0x110 [ 38.856830] do_vmi_align_munmap+0x2ba/0x11f0 [ 38.857393] ? lock_is_held_type+0x9f/0x120 [ 38.857959] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 38.858566] ? mtree_range_walk+0x632/0x900 [ 38.859108] ? mas_walk+0x5c7/0x7c0 [ 38.859571] do_vmi_munmap+0x1f1/0x2b0 [ 38.860067] mmap_region+0x1f9/0x2660 [ 38.860544] ? vm_mmap_pgoff+0x15c/0x3a0 [ 38.861058] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 38.861756] ? __pfx_lock_acquire+0x10/0x10 [ 38.862288] ? __pfx_mmap_region+0x10/0x10 [ 38.862818] ? security_mmap_addr+0x7d/0xa0 [ 38.863351] ? get_unmapped_area+0x1f5/0x3f0 [ 38.863888] do_mmap+0x854/0xf00 [ 38.864322] vm_mmap_pgoff+0x1a6/0x3a0 [ 38.864819] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 38.865385] ksys_mmap_pgoff+0x3af/0x500 [ 38.865918] do_syscall_64+0x3f/0x90 [ 38.866400] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 38.867038] RIP: 0033:0x7fbc0c28ad82 [ 38.867483] 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 [ 38.869609] RSP: 002b:00007ffd66d3c368 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 38.870528] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007fbc0c28ad82 [ 38.871382] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007fbc0b6c4000 [ 38.872218] RBP: 00007fbc0b6c4000 R08: 0000000000000009 R09: 0000000000001000 [ 38.873060] R10: 0000000000000812 R11: 0000000000000206 R12: 0000556235cbdf70 [ 38.873920] R13: 00007ffd66d3c380 R14: 00007ffd66d3c3b0 R15: 00007ffd66d3c710 [ 38.874777] [ 38.875066] [ 38.875283] Allocated by task 211: [ 38.875716] kasan_save_stack+0x22/0x50 [ 38.876213] kasan_set_track+0x25/0x30 [ 38.876703] __kasan_slab_alloc+0x59/0x70 [ 38.877220] kmem_cache_alloc+0x16b/0x370 [ 38.877730] vm_area_dup+0x20/0x160 [ 38.878196] __split_vma+0x170/0x950 [ 38.878660] split_vma+0xc6/0x110 [ 38.879099] mprotect_fixup+0x8d2/0xb30 [ 38.879598] do_mprotect_pkey+0x87e/0xd40 [ 38.880114] __x64_sys_mprotect+0x78/0xc0 [ 38.880628] do_syscall_64+0x3f/0x90 [ 38.881105] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 38.881739] [ 38.881964] Freed by task 211: [ 38.882361] kasan_save_stack+0x22/0x50 [ 38.882857] kasan_set_track+0x25/0x30 [ 38.883343] kasan_save_free_info+0x2b/0x50 [ 38.883866] __kasan_slab_free+0x10a/0x190 [ 38.884401] kmem_cache_free+0x10d/0x4d0 [ 38.884905] rcu_core+0x8c8/0x2860 [ 38.885340] __do_softirq+0x1b7/0x7d4 [ 38.885815] [ 38.886049] Last potentially related work creation: [ 38.886623] kasan_save_stack+0x22/0x50 [ 38.887124] __kasan_record_aux_stack+0x8e/0xa0 [ 38.887698] __call_rcu_common.constprop.0+0x6a/0xb90 [ 38.888340] remove_vma+0x139/0x170 [ 38.888786] do_vmi_align_munmap+0xd4a/0x11f0 [ 38.889419] do_vmi_munmap+0x1f1/0x2b0 [ 38.889913] __vm_munmap+0x138/0x3a0 [ 38.890384] __x64_sys_munmap+0x59/0x80 [ 38.890867] do_syscall_64+0x3f/0x90 [ 38.891344] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 38.891977] [ 38.892192] The buggy address belongs to the object at ffff8880098ec570 [ 38.892192] which belongs to the cache vm_area_struct of size 168 [ 38.893651] The buggy address is located 88 bytes inside of [ 38.893651] freed 168-byte region [ffff8880098ec570, ffff8880098ec618) [ 38.895071] [ 38.895285] The buggy address belongs to the physical page: [ 38.895944] page:000000008ac82442 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x98ec [ 38.896998] memcg:ffff88800e768d01 [ 38.897423] flags: 0x100000000000200(slab|node=0|zone=1) [ 38.898072] page_type: 0xffffffff() [ 38.898522] raw: 0100000000000200 ffff8880087a0c80 ffffea00003bce00 dead000000000006 [ 38.899419] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800e768d01 [ 38.900331] page dumped because: kasan: bad access detected [ 38.900995] [ 38.901204] Memory state around the buggy address: [ 38.901775] ffff8880098ec480: fc fa fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 38.902649] ffff8880098ec500: fb fb fb fb fb fb fc fc fc fc fc fc fc fc fa fb [ 38.903502] >ffff8880098ec580: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 38.904348] ^ [ 38.905016] ffff8880098ec600: fb fb fb fc fc fc fc fc fc fc fc 00 00 00 00 00 [ 38.905878] ffff8880098ec680: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 38.906728] ================================================================== [ 38.907652] Disabling lock debugging due to kernel taint [ 40.701266] BUG: Bad rss-counter state mm:0000000085771176 type:MM_FILEPAGES val:33 [ 40.702432] BUG: Bad rss-counter state mm:0000000085771176 type:MM_ANONPAGES val:22 [ 41.277825] BUG: Bad rss-counter state mm:0000000084cce86b type:MM_FILEPAGES val:33 [ 41.279552] BUG: Bad rss-counter state mm:0000000084cce86b type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:16059' (ECDSA) to the list of known hosts. 2023/06/20 12:28:08 fuzzer started 2023/06/20 12:28:08 dialing manager at localhost:36067 2023/06/20 12:28:08 checking machine... 2023/06/20 12:28:08 checking revisions... [ 42.057337] kmemleak: Automatic memory scanning thread ended 2023/06/20 12:28:08 testing simple program... [ 42.110072] cgroup: Unknown subsys name 'net' [ 42.154611] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 12:28:07 Registers: info registers vcpu 0 RAX=dffffc0000000000 RBX=ffffffff8180c6a2 RCX=ffffffff860d8201 RDX=1ffff110011b3f3a RSI=0000000000000000 RDI=ffffffff8180c6a2 RBP=ffffffff8180c6a2 RSP=ffff888008d9f928 R8 =ffffffff860d825a R9 =ffff888008d9f9b8 R10=0000000000038001 R11=0000000000010b8d R12=0000000000000001 R13=0000000000000000 R14=ffff888008d90000 R15=ffff888009330a00 RIP=ffffffff811fc772 RFL=00000283 [--S---C] 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=00007f3900fd901c CR3=0000000019f6a000 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=38323a3231203032206e754a3e38333c XMM01=6d6f72662064657463656e6e6f637369 XMM02=2e303120746f6f722072657375206d6f XMM03=3a5d3932325b646873732037303a3832 XMM04=6456774875434142334f726f59427469 XMM05=485320415352203a3268737320343433 XMM06=206d6f726620746f6f7220726f662079 XMM07=00000000000000000000000000000000 XMM08=3a677562656420676f6c737973720000 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=fffffbfff0ba7a6a RBX=fffffbfff0ba7a6b RCX=ffffffff813782c0 RDX=0000000000000001 RSI=0000000000000008 RDI=ffffffff85d3d350 RBP=fffffbfff0ba7a6a RSP=ffff88806cf09e48 R8 =0000000000000000 R9 =fffffbfff0ba7a6a R10=ffffffff85d3d357 R11=0000000000000000 R12=dffffc0000000000 R13=ffff88806cf09ee8 R14=0000000000000001 R15=ffff88800c5b7670 RIP=ffffffff8180f173 RFL=00000283 [--S---C] 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 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=00007fb5c6fbc4d0 CR3=000000000c6c2000 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=5a501b8efa997ab0ba40fd669284a898 XMM02=000000000011ada0eff9b2d0a8fce9cb XMM03=000000000011ae702c67c8bc2e329bc3 XMM04=0ae9a830d1c1fe1500000000000ae988 XMM05=08c7668bb0f9d01e0000000000133660 XMM06=4fda316b135da52b0000000000132450 XMM07=fb795ef6d65770560000000000121f68 XMM08=2c67c8bc2e329bc3000000000011ae10 XMM09=00000000000000000000000000000000 XMM10=20200000000020202020202020200000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000