[ 23.706287] BUG: Bad rss-counter state mm:0000000031569ef6 type:MM_FILEPAGES val:33 [ 23.707660] BUG: Bad rss-counter state mm:0000000031569ef6 type:MM_ANONPAGES val:22 Debian GNU/Linux 11 syzkaller ttyS0 syzkaller login: [ 23.766606] ================================================================== [ 23.767605] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 23.768627] Read of size 8 at addr ffff88800fc206b0 by task sshd/219 [ 23.769456] [ 23.769836] CPU: 1 PID: 219 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 23.770792] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 23.771856] Call Trace: [ 23.772204] [ 23.772500] dump_stack_lvl+0x91/0xf0 [ 23.773058] print_report+0xcc/0x620 [ 23.773581] ? __virt_addr_valid+0x102/0x340 [ 23.774166] ? vma_interval_tree_remove+0xc75/0xec0 [ 23.774824] ? vma_interval_tree_remove+0xc75/0xec0 [ 23.775482] kasan_report+0xbe/0xf0 [ 23.775983] ? vma_interval_tree_remove+0xc75/0xec0 [ 23.776649] vma_interval_tree_remove+0xc75/0xec0 [ 23.777289] vma_prepare+0xc54/0x11a0 [ 23.777803] __split_vma+0x5af/0x950 [ 23.778306] ? __pfx___split_vma+0x10/0x10 [ 23.778920] ? find_held_lock+0x2c/0x110 [ 23.779486] do_vmi_align_munmap+0x2ba/0x11f0 [ 23.780096] ? lock_is_held_type+0x9f/0x120 [ 23.780705] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 23.781356] ? mtree_range_walk+0x632/0x900 [ 23.781953] ? mas_walk+0x5c7/0x7c0 [ 23.782456] do_vmi_munmap+0x1f1/0x2b0 [ 23.783003] mmap_region+0x1f9/0x2660 [ 23.783536] ? vm_mmap_pgoff+0x15c/0x3a0 [ 23.784089] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 23.784870] ? __pfx_lock_acquire+0x10/0x10 [ 23.785448] ? __pfx_mmap_region+0x10/0x10 [ 23.786019] ? security_mmap_addr+0x7d/0xa0 [ 23.786586] ? get_unmapped_area+0x1f5/0x3f0 [ 23.787170] do_mmap+0x854/0xf00 [ 23.787632] vm_mmap_pgoff+0x1a6/0x3a0 [ 23.788162] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 23.788793] ksys_mmap_pgoff+0x3af/0x500 [ 23.789368] do_syscall_64+0x3f/0x90 [ 23.789883] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 23.790592] RIP: 0033:0x7f5212634d82 [ 23.791082] 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 [ 23.793436] RSP: 002b:00007ffe0cb19ce8 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 23.794452] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f5212634d82 [ 23.795365] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f5211a6e000 [ 23.796293] RBP: 00007f5211a6e000 R08: 0000000000000009 R09: 0000000000001000 [ 23.797304] R10: 0000000000000812 R11: 0000000000000206 R12: 000055949dae3ec0 [ 23.798247] R13: 00007ffe0cb19d00 R14: 00007ffe0cb19d30 R15: 00007ffe0cb1a090 [ 23.799171] [ 23.799481] [ 23.799707] Allocated by task 212: [ 23.800175] kasan_save_stack+0x22/0x50 [ 23.800754] kasan_set_track+0x25/0x30 [ 23.801279] __kasan_slab_alloc+0x59/0x70 [ 23.801843] kmem_cache_alloc+0x16b/0x370 [ 23.802437] vm_area_dup+0x20/0x160 [ 23.802935] __split_vma+0x170/0x950 [ 23.803445] split_vma+0xc6/0x110 [ 23.803914] mprotect_fixup+0x8d2/0xb30 [ 23.804435] do_mprotect_pkey+0x87e/0xd40 [ 23.804994] __x64_sys_mprotect+0x78/0xc0 [ 23.805544] do_syscall_64+0x3f/0x90 [ 23.806039] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 23.806720] [ 23.806946] Freed by task 212: [ 23.807389] kasan_save_stack+0x22/0x50 [ 23.807956] kasan_set_track+0x25/0x30 [ 23.808480] kasan_save_free_info+0x2b/0x50 [ 23.809056] __kasan_slab_free+0x10a/0x190 [ 23.809627] kmem_cache_free+0x10d/0x4d0 [ 23.810172] rcu_core+0x8c8/0x2860 [ 23.810617] __do_softirq+0x1b7/0x7d4 [ 23.811196] [ 23.811427] Last potentially related work creation: [ 23.812097] kasan_save_stack+0x22/0x50 [ 23.812687] __kasan_record_aux_stack+0x8e/0xa0 [ 23.813301] __call_rcu_common.constprop.0+0x6a/0xb90 [ 23.813956] remove_vma+0x139/0x170 [ 23.814406] do_vmi_align_munmap+0xd4a/0x11f0 [ 23.814979] do_vmi_munmap+0x1f1/0x2b0 [ 23.815494] __vm_munmap+0x138/0x3a0 [ 23.815994] __x64_sys_munmap+0x59/0x80 [ 23.816576] do_syscall_64+0x3f/0x90 [ 23.817110] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 23.817801] [ 23.818027] The buggy address belongs to the object at ffff88800fc20658 [ 23.818027] which belongs to the cache vm_area_struct of size 168 [ 23.819597] The buggy address is located 88 bytes inside of [ 23.819597] freed 168-byte region [ffff88800fc20658, ffff88800fc20700) [ 23.821109] [ 23.821343] The buggy address belongs to the physical page: [ 23.822046] page:000000002da693f5 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xfc20 [ 23.823257] memcg:ffff88800c4e2201 [ 23.823708] flags: 0x100000000000200(slab|node=0|zone=1) [ 23.824394] page_type: 0xffffffff() [ 23.824890] raw: 0100000000000200 ffff8880087a0c80 dead000000000122 0000000000000000 [ 23.825865] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800c4e2201 [ 23.826886] page dumped because: kasan: bad access detected [ 23.827596] [ 23.827820] Memory state around the buggy address: [ 23.828453] ffff88800fc20580: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 23.829400] ffff88800fc20600: 00 00 00 fc fc fc fc fc fc fc fc fa fb fb fb fb [ 23.830300] >ffff88800fc20680: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 23.831198] ^ [ 23.831882] ffff88800fc20700: fc fc fc fc fc fc fc fc fa fb fb fb fb fb fb fb [ 23.832783] ffff88800fc20780: fb fb fb fb fb fb fb fb fb fb fb fb fb fc fc fc [ 23.833644] ================================================================== [ 23.834599] Disabling lock debugging due to kernel taint [ 25.763812] BUG: Bad rss-counter state mm:0000000016c68367 type:MM_FILEPAGES val:33 [ 25.764840] BUG: Bad rss-counter state mm:0000000016c68367 type:MM_ANONPAGES val:22 [ 26.265700] BUG: Bad rss-counter state mm:00000000ad8a67aa type:MM_FILEPAGES val:33 [ 26.266945] BUG: Bad rss-counter state mm:00000000ad8a67aa type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:42342' (ECDSA) to the list of known hosts. 2023/06/20 16:53:22 fuzzer started 2023/06/20 16:53:22 dialing manager at localhost:36067 2023/06/20 16:53:22 checking machine... 2023/06/20 16:53:22 checking revisions... [ 26.937285] kmemleak: Automatic memory scanning thread ended 2023/06/20 16:53:22 testing simple program... [ 26.987953] cgroup: Unknown subsys name 'net' [ 27.026504] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 16:53:22 Registers: info registers vcpu 0 RAX=0000000000000000 RBX=ffffffff85dba0fc RCX=ffffffff813782f7 RDX=0000000000000000 RSI=ffffffff860d2fd0 RDI=ffffffff85dba0f4 RBP=ffffffff85dba0fc RSP=ffff88806ce099e0 R8 =ffffffff860d2fd0 R9 =ffff88806ce09ad8 R10=0000000000038001 R11=000000000000fdcc R12=ffffffff85dba0fc R13=ffffffff85dba0f4 R14=ffffffff85dba0f8 R15=dffffc0000000000 RIP=ffffffff8112fc73 RFL=00000256 [---ZAP-] 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 00007f1b67e59900 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=00007fa97d236390 CR3=000000000d574000 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=00000000000000000000000000000000 XMM01=5837a5db0510e0bbab4b4f028adf0564 XMM02=ec2efd57dc4c00df000000000011b450 XMM03=2df898cc407baac0000000000011b520 XMM04=7492f0e38fd0855b00000000000ae988 XMM05=dfcdbad4f1609c3700000000001312d8 XMM06=699437d05856aa5000000000001304b0 XMM07=e042d86d42eb936e0000000000121a48 XMM08=2df898cc407baac0000000000011b520 XMM09=00000000000000000000000000000000 XMM10=20200000000020202020202020200000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=00000000dead4ead RBX=ffffffff856d84a0 RCX=0000000000000000 RDX=0000000000000000 RSI=0000000000000008 RDI=ffffffff856d84a4 RBP=1ffff110011c6f6f RSP=ffff888008e37b70 R8 =0000000000000000 R9 =fffffbfff0ba7a6a R10=ffffffff85d3d357 R11=0000000000000128 R12=0000000000000283 R13=ffffea0000669c80 R14=ffffffff81ef57e8 R15=ffff88800f0dd6c0 RIP=ffffffff812e009a RFL=00000046 [---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 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=00007ffd56afb000 CR3=000000000d9d2000 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