syzkaller login: [ 23.671232] BUG: Bad rss-counter state mm:000000000b8edfb6 type:MM_FILEPAGES val:33 [ 23.672250] BUG: Bad rss-counter state mm:000000000b8edfb6 type:MM_ANONPAGES val:22 [ 23.838010] ================================================================== [ 23.838905] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 23.839831] Read of size 8 at addr ffff88800e288310 by task sshd/219 [ 23.840692] [ 23.840916] CPU: 0 PID: 219 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 23.841779] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 23.842757] Call Trace: [ 23.843074] [ 23.843367] dump_stack_lvl+0x91/0xf0 [ 23.843854] print_report+0xcc/0x620 [ 23.844336] ? __virt_addr_valid+0x102/0x340 [ 23.844883] ? vma_interval_tree_remove+0xc75/0xec0 [ 23.845495] ? vma_interval_tree_remove+0xc75/0xec0 [ 23.846149] kasan_report+0xbe/0xf0 [ 23.846620] ? vma_interval_tree_remove+0xc75/0xec0 [ 23.847235] vma_interval_tree_remove+0xc75/0xec0 [ 23.847838] vma_prepare+0xc54/0x11a0 [ 23.848320] __split_vma+0x5af/0x950 [ 23.848788] ? __pfx___split_vma+0x10/0x10 [ 23.849310] ? find_held_lock+0x2c/0x110 [ 23.849848] do_vmi_align_munmap+0x2ba/0x11f0 [ 23.850409] ? lock_is_held_type+0x9f/0x120 [ 23.850946] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 23.851557] ? mtree_range_walk+0x632/0x900 [ 23.852100] ? mas_walk+0x5c7/0x7c0 [ 23.852579] do_vmi_munmap+0x1f1/0x2b0 [ 23.853071] mmap_region+0x1f9/0x2660 [ 23.853550] ? vm_mmap_pgoff+0x15c/0x3a0 [ 23.854069] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 23.854778] ? __pfx_lock_acquire+0x10/0x10 [ 23.855301] ? __pfx_mmap_region+0x10/0x10 [ 23.855831] ? security_mmap_addr+0x7d/0xa0 [ 23.856355] ? get_unmapped_area+0x1f5/0x3f0 [ 23.856906] do_mmap+0x854/0xf00 [ 23.857348] vm_mmap_pgoff+0x1a6/0x3a0 [ 23.857875] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 23.858438] ksys_mmap_pgoff+0x3af/0x500 [ 23.858943] do_syscall_64+0x3f/0x90 [ 23.859421] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 23.860059] RIP: 0033:0x7f1cec0abd82 [ 23.860516] 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 [ 23.862638] RSP: 002b:00007ffd6ce4f5e8 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 23.863537] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f1cec0abd82 [ 23.864380] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f1ceb4e5000 [ 23.865214] RBP: 00007f1ceb4e5000 R08: 0000000000000009 R09: 0000000000001000 [ 23.866072] R10: 0000000000000812 R11: 0000000000000206 R12: 000055d1aa0e8ec0 [ 23.866910] R13: 00007ffd6ce4f600 R14: 00007ffd6ce4f630 R15: 00007ffd6ce4f990 [ 23.867757] [ 23.868050] [ 23.868270] Allocated by task 212: [ 23.868698] kasan_save_stack+0x22/0x50 [ 23.869202] kasan_set_track+0x25/0x30 [ 23.869712] __kasan_slab_alloc+0x59/0x70 [ 23.870235] kmem_cache_alloc+0x16b/0x370 [ 23.870751] vm_area_dup+0x20/0x160 [ 23.871198] __split_vma+0x170/0x950 [ 23.871662] split_vma+0xc6/0x110 [ 23.872099] mprotect_fixup+0x8d2/0xb30 [ 23.872599] do_mprotect_pkey+0x87e/0xd40 [ 23.873119] __x64_sys_mprotect+0x78/0xc0 [ 23.873633] do_syscall_64+0x3f/0x90 [ 23.874129] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 23.874772] [ 23.874988] Freed by task 203: [ 23.875371] kasan_save_stack+0x22/0x50 [ 23.875873] kasan_set_track+0x25/0x30 [ 23.876364] kasan_save_free_info+0x2b/0x50 [ 23.876895] __kasan_slab_free+0x10a/0x190 [ 23.877424] kmem_cache_free+0x10d/0x4d0 [ 23.877940] rcu_core+0x8c8/0x2860 [ 23.878384] __do_softirq+0x1b7/0x7d4 [ 23.878865] [ 23.879083] Last potentially related work creation: [ 23.879659] kasan_save_stack+0x22/0x50 [ 23.880163] __kasan_record_aux_stack+0x8e/0xa0 [ 23.880739] __call_rcu_common.constprop.0+0x6a/0xb90 [ 23.881380] remove_vma+0x139/0x170 [ 23.881840] do_vmi_align_munmap+0xd4a/0x11f0 [ 23.882390] do_vmi_munmap+0x1f1/0x2b0 [ 23.882877] __vm_munmap+0x138/0x3a0 [ 23.883345] __x64_sys_munmap+0x59/0x80 [ 23.883846] do_syscall_64+0x3f/0x90 [ 23.884319] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 23.884957] [ 23.885174] The buggy address belongs to the object at ffff88800e2882b8 [ 23.885174] which belongs to the cache vm_area_struct of size 168 [ 23.886644] The buggy address is located 88 bytes inside of [ 23.886644] freed 168-byte region [ffff88800e2882b8, ffff88800e288360) [ 23.888030] [ 23.888245] The buggy address belongs to the physical page: [ 23.888897] page:00000000058d6a20 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xe288 [ 23.889973] memcg:ffff88800eaf9b01 [ 23.890395] anon flags: 0x100000000000200(slab|node=0|zone=1) [ 23.891104] page_type: 0xffffffff() [ 23.891554] raw: 0100000000000200 ffff8880087a0c80 0000000000000000 dead000000000001 [ 23.892453] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800eaf9b01 [ 23.893344] page dumped because: kasan: bad access detected [ 23.894014] [ 23.894230] Memory state around the buggy address: [ 23.894798] ffff88800e288200: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 fc [ 23.895644] ffff88800e288280: fc fc fc fc fc fc fc fa fb fb fb fb fb fb fb fb [ 23.896496] >ffff88800e288300: fb fb fb fb fb fb fb fb fb fb fb fb fc fc fc fc [ 23.897330] ^ [ 23.897813] ffff88800e288380: fc fc fc fc fa fb fb fb fb fb fb fb fb fb fb fb [ 23.898691] ffff88800e288400: fb fb fb fb fb fb fb fb fb fc fc fc fc fc fc fc [ 23.899613] ================================================================== [ 23.900895] Disabling lock debugging due to kernel taint [ 26.064086] BUG: Bad rss-counter state mm:00000000877aab0e type:MM_FILEPAGES val:33 [ 26.065567] BUG: Bad rss-counter state mm:00000000877aab0e type:MM_ANONPAGES val:22 [ 26.069049] sshd (219) used greatest stack depth: 24120 bytes left [ 26.593536] BUG: Bad rss-counter state mm:0000000079b3db07 type:MM_FILEPAGES val:33 [ 26.594698] BUG: Bad rss-counter state mm:0000000079b3db07 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:41734' (ECDSA) to the list of known hosts. 2023/06/20 12:34:24 fuzzer started 2023/06/20 12:34:25 dialing manager at localhost:36067 2023/06/20 12:34:25 checking machine... 2023/06/20 12:34:25 checking revisions... [ 27.353864] kmemleak: Automatic memory scanning thread ended 2023/06/20 12:34:25 testing simple program... [ 27.398402] cgroup: Unknown subsys name 'net' [ 27.445187] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 12:34:24 Registers: info registers vcpu 0 RAX=0000000000000001 RBX=0000000000000000 RCX=ffffffff815344fa RDX=0000000000000000 RSI=0000000000000008 RDI=ffffffff85d3d350 RBP=ffff88801968ff58 RSP=ffff88801968ff20 R8 =0000000000000000 R9 =fffffbfff0ba7a6a R10=ffffffff85d3d357 R11=0000000000000000 R12=00000000000000ca R13=0000000000000000 R14=0000000000000000 R15=0000000000000000 RIP=ffffffff81534294 RFL=00000002 [-------] 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 00007f44be307700 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=00007ffc8cd22ef8 CR3=0000000016b34000 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=34333a3231203032206e754a3e36383c XMM01=7365733a646873732878696e755f6d61 XMM02=736f6c63206e6f6973736573203a296e XMM03=5f6d6170203a5d3932325b6468737320 XMM04=6456774875434142334f726f59427469 XMM05=485320415352203a3268737320303834 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=dffffc0000000000 RBX=ffff88806cf35000 RCX=ffffffff815342db RDX=0000000000000000 RSI=0000000000000008 RDI=ffffffff85d3d350 RBP=ffffffff81830828 RSP=ffff88806cf09d90 R8 =0000000000000000 R9 =fffffbfff0ba7a6a R10=ffffffff85d3d357 R11=00000000000b6a61 R12=ffff88806cf361c8 R13=ffffffff87b6a200 R14=0000000000000000 R15=0000000000000000 RIP=ffffffff8135b960 RFL=00000016 [----AP-] 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 00007fd50791f900 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=00007ffecf5d6000 CR3=000000000fb34000 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=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