syzkaller login: [ 30.806641] BUG: Bad rss-counter state mm:00000000f9bf79d4 type:MM_FILEPAGES val:33 [ 30.807889] BUG: Bad rss-counter state mm:00000000f9bf79d4 type:MM_ANONPAGES val:22 [ 30.846268] ================================================================== [ 30.847285] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 30.848233] Read of size 8 at addr ffff88800e7a9140 by task sshd/220 [ 30.849031] [ 30.849254] CPU: 0 PID: 220 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 30.850173] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 30.851176] Call Trace: [ 30.851505] [ 30.851792] dump_stack_lvl+0x91/0xf0 [ 30.852303] print_report+0xcc/0x620 [ 30.852791] ? __virt_addr_valid+0x102/0x340 [ 30.853365] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.853992] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.854648] kasan_report+0xbe/0xf0 [ 30.855146] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.855777] vma_interval_tree_remove+0xc75/0xec0 [ 30.856388] vma_prepare+0xc54/0x11a0 [ 30.856888] __split_vma+0x5af/0x950 [ 30.857377] ? __pfx___split_vma+0x10/0x10 [ 30.857905] ? find_held_lock+0x2c/0x110 [ 30.858462] do_vmi_align_munmap+0x2ba/0x11f0 [ 30.859038] ? lock_is_held_type+0x9f/0x120 [ 30.859589] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 30.860206] ? mtree_range_walk+0x632/0x900 [ 30.860769] ? mas_walk+0x5c7/0x7c0 [ 30.861262] do_vmi_munmap+0x1f1/0x2b0 [ 30.861769] mmap_region+0x1f9/0x2660 [ 30.862282] ? vm_mmap_pgoff+0x15c/0x3a0 [ 30.862789] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 30.863519] ? __pfx_lock_acquire+0x10/0x10 [ 30.864072] ? __pfx_mmap_region+0x10/0x10 [ 30.864609] ? security_mmap_addr+0x7d/0xa0 [ 30.865156] ? get_unmapped_area+0x1f5/0x3f0 [ 30.865713] do_mmap+0x854/0xf00 [ 30.866181] vm_mmap_pgoff+0x1a6/0x3a0 [ 30.866683] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 30.867255] ksys_mmap_pgoff+0x3af/0x500 [ 30.867769] do_syscall_64+0x3f/0x90 [ 30.868264] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.868925] RIP: 0033:0x7f9768118d82 [ 30.869402] 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 [ 30.871566] RSP: 002b:00007ffc679f43f8 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 30.872517] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f9768118d82 [ 30.873529] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f9767552000 [ 30.874410] RBP: 00007f9767552000 R08: 0000000000000009 R09: 0000000000001000 [ 30.875272] R10: 0000000000000812 R11: 0000000000000206 R12: 000055793cedaec0 [ 30.876149] R13: 00007ffc679f4410 R14: 00007ffc679f4440 R15: 00007ffc679f47a0 [ 30.877042] [ 30.877346] [ 30.877562] Allocated by task 213: [ 30.877996] kasan_save_stack+0x22/0x50 [ 30.878521] kasan_set_track+0x25/0x30 [ 30.879048] __kasan_slab_alloc+0x59/0x70 [ 30.879588] kmem_cache_alloc+0x16b/0x370 [ 30.880117] vm_area_dup+0x20/0x160 [ 30.880575] __split_vma+0x170/0x950 [ 30.881050] split_vma+0xc6/0x110 [ 30.881524] mprotect_fixup+0x8d2/0xb30 [ 30.882070] do_mprotect_pkey+0x87e/0xd40 [ 30.882658] __x64_sys_mprotect+0x78/0xc0 [ 30.883220] do_syscall_64+0x3f/0x90 [ 30.883717] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.884408] [ 30.884641] Freed by task 213: [ 30.885051] kasan_save_stack+0x22/0x50 [ 30.885594] kasan_set_track+0x25/0x30 [ 30.886129] kasan_save_free_info+0x2b/0x50 [ 30.886704] __kasan_slab_free+0x10a/0x190 [ 30.887278] kmem_cache_free+0x10d/0x4d0 [ 30.887817] rcu_core+0x8c8/0x2860 [ 30.888291] __do_softirq+0x1b7/0x7d4 [ 30.888800] [ 30.889026] Last potentially related work creation: [ 30.889656] kasan_save_stack+0x22/0x50 [ 30.890192] __kasan_record_aux_stack+0x8e/0xa0 [ 30.890802] __call_rcu_common.constprop.0+0x6a/0xb90 [ 30.891498] remove_vma+0x139/0x170 [ 30.891981] do_vmi_align_munmap+0xd4a/0x11f0 [ 30.892586] do_vmi_munmap+0x1f1/0x2b0 [ 30.893117] __vm_munmap+0x138/0x3a0 [ 30.893606] __x64_sys_munmap+0x59/0x80 [ 30.894149] do_syscall_64+0x3f/0x90 [ 30.894662] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.895338] [ 30.895566] The buggy address belongs to the object at ffff88800e7a90e8 [ 30.895566] which belongs to the cache vm_area_struct of size 168 [ 30.897139] The buggy address is located 88 bytes inside of [ 30.897139] freed 168-byte region [ffff88800e7a90e8, ffff88800e7a9190) [ 30.898663] [ 30.898895] The buggy address belongs to the physical page: [ 30.899612] page:00000000f73cb5d0 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xe7a9 [ 30.900786] memcg:ffff8880192e6501 [ 30.901232] flags: 0x100000000000200(slab|node=0|zone=1) [ 30.901949] page_type: 0xffffffff() [ 30.902451] raw: 0100000000000200 ffff8880087a0c80 dead000000000122 0000000000000000 [ 30.903444] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff8880192e6501 [ 30.904412] page dumped because: kasan: bad access detected [ 30.905134] [ 30.905364] Memory state around the buggy address: [ 30.906008] ffff88800e7a9000: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 30.906944] ffff88800e7a9080: 00 00 00 00 00 fc fc fc fc fc fc fc fc fa fb fb [ 30.907857] >ffff88800e7a9100: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 30.908775] ^ [ 30.909466] ffff88800e7a9180: fb fb fc fc fc fc fc fc fc fc fa fb fb fb fb fb [ 30.910396] ffff88800e7a9200: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fc [ 30.911309] ================================================================== [ 30.912570] Disabling lock debugging due to kernel taint [ 33.506786] BUG: Bad rss-counter state mm:000000008b4bd599 type:MM_FILEPAGES val:33 [ 33.507798] BUG: Bad rss-counter state mm:000000008b4bd599 type:MM_ANONPAGES val:22 [ 33.952368] BUG: Bad rss-counter state mm:0000000017678b5c type:MM_FILEPAGES val:33 [ 33.953773] BUG: Bad rss-counter state mm:0000000017678b5c type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:30392' (ECDSA) to the list of known hosts. 2023/06/21 06:33:57 fuzzer started 2023/06/21 06:33:57 dialing manager at localhost:36067 2023/06/21 06:33:57 checking machine... 2023/06/21 06:33:57 checking revisions... [ 34.686421] kmemleak: Automatic memory scanning thread ended 2023/06/21 06:33:57 testing simple program... [ 34.733791] cgroup: Unknown subsys name 'net' [ 34.784369] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 06:33:57 Registers: info registers vcpu 0 RAX=dffffc0000000000 RBX=ffff88800feb4f00 RCX=0000000000000000 RDX=1ffff11001fd69ef RSI=ffffffff818e8884 RDI=ffff88800feb4f78 RBP=0000000000000008 RSP=ffff88800c5d7eb0 R8 =0000000000000005 R9 =0000000000000000 R10=0000000000000000 R11=0000000000000000 R12=0000000000000000 R13=ffff88800feb4f60 R14=0000000000000000 R15=0000000000000000 RIP=ffffffff818e889d 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 =0018 0000000000000000 ffffffff 00c09300 DPL=0 DS [-WA] DS =0000 0000000000000000 00000000 00000000 FS =0000 00007f4df1b93900 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=00007ffed5b65000 CR3=0000000016586000 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=00007f001e50def0 CR3=0000000009702000 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=4dc968461dbfff86e1459ca6e45e7294 XMM02=2c67c8bc2e329bc3000000000011bad0 XMM03=fb795ef6d657705600000000001227d8 XMM04=b17b0e241745acd100000000000ae988 XMM05=fa6037e23e3315700000000000133498 XMM06=4fda316b135da52b0000000000132538 XMM07=e042d86d42eb936e0000000000122a58 XMM08=23681095c56935a2000000000011bb30 XMM09=00000000000000000000000000000000 XMM10=20200000000020202020202020200000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000