syzkaller login: [ 30.649014] BUG: Bad rss-counter state mm:00000000876155e6 type:MM_FILEPAGES val:33 [ 30.650011] BUG: Bad rss-counter state mm:00000000876155e6 type:MM_ANONPAGES val:22 [ 30.816928] ================================================================== [ 30.817848] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 30.818782] Read of size 8 at addr ffff8880095d6ed8 by task sshd/220 [ 30.819553] [ 30.819890] CPU: 1 PID: 220 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 30.820787] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 30.821759] Call Trace: [ 30.822079] [ 30.822375] dump_stack_lvl+0x91/0xf0 [ 30.822863] print_report+0xcc/0x620 [ 30.823369] ? __virt_addr_valid+0x102/0x340 [ 30.823916] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.824533] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.825141] kasan_report+0xbe/0xf0 [ 30.825617] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.826230] vma_interval_tree_remove+0xc75/0xec0 [ 30.826829] vma_prepare+0xc54/0x11a0 [ 30.827312] __split_vma+0x5af/0x950 [ 30.827780] ? __pfx___split_vma+0x10/0x10 [ 30.828311] ? find_held_lock+0x2c/0x110 [ 30.828821] do_vmi_align_munmap+0x2ba/0x11f0 [ 30.829384] ? lock_is_held_type+0x9f/0x120 [ 30.829913] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 30.830521] ? mtree_range_walk+0x632/0x900 [ 30.831069] ? mas_walk+0x5c7/0x7c0 [ 30.831553] do_vmi_munmap+0x1f1/0x2b0 [ 30.832045] mmap_region+0x1f9/0x2660 [ 30.832526] ? vm_mmap_pgoff+0x15c/0x3a0 [ 30.833032] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 30.833744] ? __pfx_lock_acquire+0x10/0x10 [ 30.834277] ? __pfx_mmap_region+0x10/0x10 [ 30.834807] ? security_mmap_addr+0x7d/0xa0 [ 30.835349] ? get_unmapped_area+0x1f5/0x3f0 [ 30.835890] do_mmap+0x854/0xf00 [ 30.836320] vm_mmap_pgoff+0x1a6/0x3a0 [ 30.836810] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 30.837371] ksys_mmap_pgoff+0x3af/0x500 [ 30.837870] do_syscall_64+0x3f/0x90 [ 30.838344] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.838984] RIP: 0033:0x7ff52d077d82 [ 30.839445] 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 [ 30.841556] RSP: 002b:00007ffdacbc2178 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 30.842453] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007ff52d077d82 [ 30.843319] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007ff52c4b1000 [ 30.844152] RBP: 00007ff52c4b1000 R08: 0000000000000009 R09: 0000000000001000 [ 30.844991] R10: 0000000000000812 R11: 0000000000000206 R12: 000055b3b0197b20 [ 30.845830] R13: 00007ffdacbc2190 R14: 00007ffdacbc21c0 R15: 00007ffdacbc2520 [ 30.846684] [ 30.846972] [ 30.847196] Allocated by task 213: [ 30.847617] kasan_save_stack+0x22/0x50 [ 30.848112] kasan_set_track+0x25/0x30 [ 30.848605] __kasan_slab_alloc+0x59/0x70 [ 30.849128] kmem_cache_alloc+0x16b/0x370 [ 30.849642] vm_area_dup+0x20/0x160 [ 30.850096] __split_vma+0x170/0x950 [ 30.850558] split_vma+0xc6/0x110 [ 30.850996] mprotect_fixup+0x8d2/0xb30 [ 30.851497] do_mprotect_pkey+0x87e/0xd40 [ 30.852013] __x64_sys_mprotect+0x78/0xc0 [ 30.852527] do_syscall_64+0x3f/0x90 [ 30.852999] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.853634] [ 30.853852] Freed by task 213: [ 30.854242] kasan_save_stack+0x22/0x50 [ 30.854746] kasan_set_track+0x25/0x30 [ 30.855253] kasan_save_free_info+0x2b/0x50 [ 30.855778] __kasan_slab_free+0x10a/0x190 [ 30.856303] kmem_cache_free+0x10d/0x4d0 [ 30.856808] rcu_core+0x8c8/0x2860 [ 30.857243] __do_softirq+0x1b7/0x7d4 [ 30.857715] [ 30.857930] Last potentially related work creation: [ 30.858512] kasan_save_stack+0x22/0x50 [ 30.859016] __kasan_record_aux_stack+0x8e/0xa0 [ 30.859600] __call_rcu_common.constprop.0+0x6a/0xb90 [ 30.860245] remove_vma+0x139/0x170 [ 30.860693] do_vmi_align_munmap+0xd4a/0x11f0 [ 30.861239] do_vmi_munmap+0x1f1/0x2b0 [ 30.861823] __vm_munmap+0x138/0x3a0 [ 30.862286] __x64_sys_munmap+0x59/0x80 [ 30.862778] do_syscall_64+0x3f/0x90 [ 30.863271] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.863912] [ 30.864131] Second to last potentially related work creation: [ 30.864809] kasan_save_stack+0x22/0x50 [ 30.865308] __kasan_record_aux_stack+0x8e/0xa0 [ 30.865874] __call_rcu_common.constprop.0+0x6a/0xb90 [ 30.866504] remove_vma+0x139/0x170 [ 30.866944] do_vmi_align_munmap+0xd4a/0x11f0 [ 30.867504] __do_sys_brk+0x90d/0xc70 [ 30.867980] do_syscall_64+0x3f/0x90 [ 30.868453] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.869093] [ 30.869309] The buggy address belongs to the object at ffff8880095d6e80 [ 30.869309] which belongs to the cache vm_area_struct of size 168 [ 30.870750] The buggy address is located 88 bytes inside of [ 30.870750] freed 168-byte region [ffff8880095d6e80, ffff8880095d6f28) [ 30.872150] [ 30.872362] The buggy address belongs to the physical page: [ 30.873016] page:0000000052b72333 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x95d6 [ 30.874101] memcg:ffff888018344b01 [ 30.874532] flags: 0x100000000000200(slab|node=0|zone=1) [ 30.875190] page_type: 0xffffffff() [ 30.875640] raw: 0100000000000200 ffff8880087a0c80 ffffea00003aafc0 0000000000000002 [ 30.876562] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff888018344b01 [ 30.877460] page dumped because: kasan: bad access detected [ 30.878116] [ 30.878331] Memory state around the buggy address: [ 30.878908] ffff8880095d6d80: fc fc fc 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 30.879775] ffff8880095d6e00: 00 00 00 00 00 00 00 00 fc fc fc fc fc fc fc fc [ 30.880621] >ffff8880095d6e80: fa fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 30.881463] ^ [ 30.882184] ffff8880095d6f00: fb fb fb fb fb fc fc fc fc fc fc fc fc fc fc fc [ 30.883037] ffff8880095d6f80: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc [ 30.883896] ================================================================== [ 30.884821] Disabling lock debugging due to kernel taint [ 32.746282] BUG: Bad rss-counter state mm:0000000096e2fded type:MM_FILEPAGES val:33 [ 32.747564] BUG: Bad rss-counter state mm:0000000096e2fded type:MM_ANONPAGES val:22 [ 33.277306] BUG: Bad rss-counter state mm:000000009463baf0 type:MM_FILEPAGES val:33 [ 33.278508] BUG: Bad rss-counter state mm:000000009463baf0 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:7728' (ECDSA) to the list of known hosts. 2023/06/20 12:57:59 fuzzer started 2023/06/20 12:57:59 dialing manager at localhost:36067 2023/06/20 12:57:59 checking machine... 2023/06/20 12:57:59 checking revisions... [ 33.885604] kmemleak: Automatic memory scanning thread ended 2023/06/20 12:57:59 testing simple program... [ 33.929974] cgroup: Unknown subsys name 'net' [ 33.966103] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 12:57:58 Registers: info registers vcpu 0 RAX=000000000c4cfaa2 RBX=00000000b3b197a9 RCX=ffff8880103476bc RDX=0000000000000012 RSI=0000000000000009 RDI=00000000ea23fec9 RBP=ffff88800bfa7640 RSP=ffff8880103475e8 R8 =000000002228fbd9 R9 =fffffbfff0ba7a6a R10=ffffffff85d3d357 R11=00000000000b6d53 R12=0000000000000001 R13=0000000000000d40 R14=ffff888010347650 R15=0000000000000012 RIP=ffffffff822704a2 RFL=00000213 [----A-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 =0000 0000000000000000 00000000 00000000 DS =0000 0000000000000000 00000000 00000000 FS =0000 00007feb6a2c1900 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=00007feb6971a050 CR3=0000000013a22000 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=454d49544c4145525f454352554f535f XMM01=3d504d415453454d49545f454d49544c XMM02=ffffffffffffffffffffffffffffffff XMM03=2f6c616e72756f6a2f676f6c2f6e7572 XMM04=24e82175f91541ca00000000000ae988 XMM05=866039fdc488dd2c0000000000133e88 XMM06=4fda316b135da52b0000000000132f28 XMM07=00000000000000000000000000000000 XMM08=415453454d49545f454d49544c414552 XMM09=00000000000000000000000000000000 XMM10=20200000000020202020202020200000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=0000000000038000 RBX=0000000000000001 RCX=ffffffff83662308 RDX=dffffc0000000000 RSI=0000000000026623 RDI=ffff88801833f560 RBP=ffff88801833f5b8 RSP=ffff88801833f4f0 R8 =0000000000000001 R9 =ffff88801833f5a0 R10=0000000000038001 R11=0000000000020c57 R12=ffff88801833f5c0 R13=ffff88801833f5a8 R14=ffff88801833f5a1 R15=ffff88801833f560 RIP=ffffffff81130754 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 00007fb8f17dd900 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=00007ffe10ca8000 CR3=00000000167d0000 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