[ 31.561093] BUG: Bad rss-counter state mm:0000000078c735bf type:MM_FILEPAGES val:33 [ 31.562101] BUG: Bad rss-counter state mm:0000000078c735bf type:MM_ANONPAGES val:22 Debian GNU/Linux 11 syzkaller ttyS0 syzkaller login: [ 31.722347] ================================================================== [ 31.723437] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 31.724581] Read of size 8 at addr ffff88801a0b6d08 by task sshd/228 [ 31.725606] [ 31.725827] CPU: 1 PID: 228 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 31.726701] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 31.727691] Call Trace: [ 31.728017] [ 31.728310] dump_stack_lvl+0x91/0xf0 [ 31.728829] print_report+0xcc/0x620 [ 31.729331] ? __virt_addr_valid+0x102/0x340 [ 31.729880] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.730492] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.731121] kasan_report+0xbe/0xf0 [ 31.731599] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.732223] vma_interval_tree_remove+0xc75/0xec0 [ 31.732839] vma_prepare+0xc54/0x11a0 [ 31.733325] __split_vma+0x5af/0x950 [ 31.733798] ? __pfx___split_vma+0x10/0x10 [ 31.734331] ? find_held_lock+0x2c/0x110 [ 31.734857] do_vmi_align_munmap+0x2ba/0x11f0 [ 31.735426] ? lock_is_held_type+0x9f/0x120 [ 31.735971] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 31.736601] ? mtree_range_walk+0x632/0x900 [ 31.737158] ? mas_walk+0x5c7/0x7c0 [ 31.737637] do_vmi_munmap+0x1f1/0x2b0 [ 31.738141] mmap_region+0x1f9/0x2660 [ 31.738629] ? vm_mmap_pgoff+0x15c/0x3a0 [ 31.739150] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 31.739867] ? __pfx_lock_acquire+0x10/0x10 [ 31.740402] ? __pfx_mmap_region+0x10/0x10 [ 31.740950] ? security_mmap_addr+0x7d/0xa0 [ 31.741490] ? get_unmapped_area+0x1f5/0x3f0 [ 31.742048] do_mmap+0x854/0xf00 [ 31.742491] vm_mmap_pgoff+0x1a6/0x3a0 [ 31.742992] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 31.743557] ksys_mmap_pgoff+0x3af/0x500 [ 31.744071] do_syscall_64+0x3f/0x90 [ 31.744563] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.745215] RIP: 0033:0x7f48774b4d82 [ 31.745679] 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 [ 31.747825] RSP: 002b:00007fffff1b41a8 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 31.748762] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f48774b4d82 [ 31.749623] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f48768ee000 [ 31.750472] RBP: 00007f48768ee000 R08: 0000000000000009 R09: 0000000000001000 [ 31.751330] R10: 0000000000000812 R11: 0000000000000206 R12: 0000562d34747ec0 [ 31.752180] R13: 00007fffff1b41c0 R14: 00007fffff1b41f0 R15: 00007fffff1b4550 [ 31.753049] [ 31.753346] [ 31.753562] Allocated by task 221: [ 31.753992] kasan_save_stack+0x22/0x50 [ 31.754505] kasan_set_track+0x25/0x30 [ 31.755002] __kasan_slab_alloc+0x59/0x70 [ 31.755530] kmem_cache_alloc+0x16b/0x370 [ 31.756057] vm_area_dup+0x20/0x160 [ 31.756527] __split_vma+0x170/0x950 [ 31.756997] split_vma+0xc6/0x110 [ 31.757450] mprotect_fixup+0x8d2/0xb30 [ 31.757961] do_mprotect_pkey+0x87e/0xd40 [ 31.758486] __x64_sys_mprotect+0x78/0xc0 [ 31.759014] do_syscall_64+0x3f/0x90 [ 31.759496] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.760142] [ 31.760362] Freed by task 221: [ 31.760768] kasan_save_stack+0x22/0x50 [ 31.761278] kasan_set_track+0x25/0x30 [ 31.761782] kasan_save_free_info+0x2b/0x50 [ 31.762315] __kasan_slab_free+0x10a/0x190 [ 31.762860] kmem_cache_free+0x10d/0x4d0 [ 31.763380] rcu_core+0x8c8/0x2860 [ 31.763826] __do_softirq+0x1b7/0x7d4 [ 31.764310] [ 31.764549] Last potentially related work creation: [ 31.765137] kasan_save_stack+0x22/0x50 [ 31.765651] __kasan_record_aux_stack+0x8e/0xa0 [ 31.766227] __call_rcu_common.constprop.0+0x6a/0xb90 [ 31.766875] remove_vma+0x139/0x170 [ 31.767340] do_vmi_align_munmap+0xd4a/0x11f0 [ 31.767904] do_vmi_munmap+0x1f1/0x2b0 [ 31.768397] __vm_munmap+0x138/0x3a0 [ 31.768878] __x64_sys_munmap+0x59/0x80 [ 31.769382] do_syscall_64+0x3f/0x90 [ 31.769857] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.770512] [ 31.770729] The buggy address belongs to the object at ffff88801a0b6cb0 [ 31.770729] which belongs to the cache vm_area_struct of size 168 [ 31.772216] The buggy address is located 88 bytes inside of [ 31.772216] freed 168-byte region [ffff88801a0b6cb0, ffff88801a0b6d58) [ 31.773655] [ 31.773872] The buggy address belongs to the physical page: [ 31.774539] page:00000000e7a013e4 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x1a0b6 [ 31.775644] memcg:ffff88801a0b7001 [ 31.776069] flags: 0x100000000000200(slab|node=0|zone=1) [ 31.776739] page_type: 0xffffffff() [ 31.777196] raw: 0100000000000200 ffff8880087a0c80 dead000000000122 0000000000000000 [ 31.778127] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88801a0b7001 [ 31.779043] page dumped because: kasan: bad access detected [ 31.779729] [ 31.779949] Memory state around the buggy address: [ 31.780541] ffff88801a0b6c00: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 fc fc [ 31.781398] ffff88801a0b6c80: fc fc fc fc fc fc fa fb fb fb fb fb fb fb fb fb [ 31.782255] >ffff88801a0b6d00: fb fb fb fb fb fb fb fb fb fb fb fc fc fc fc fc [ 31.783121] ^ [ 31.783561] ffff88801a0b6d80: fc fc fc fa fb fb fb fb fb fb fb fb fb fb fb fb [ 31.784425] ffff88801a0b6e00: fb fb fb fb fb fb fb fb fc fc fc fc fc fc fc fc [ 31.785300] ================================================================== [ 31.786720] Disabling lock debugging due to kernel taint [ 33.801581] BUG: Bad rss-counter state mm:00000000d3841ddc type:MM_FILEPAGES val:33 [ 33.802934] BUG: Bad rss-counter state mm:00000000d3841ddc type:MM_ANONPAGES val:22 [ 34.258836] BUG: Bad rss-counter state mm:00000000b8ea6c78 type:MM_FILEPAGES val:33 [ 34.259922] BUG: Bad rss-counter state mm:00000000b8ea6c78 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:60597' (ECDSA) to the list of known hosts. 2023/06/21 00:33:21 fuzzer started 2023/06/21 00:33:21 dialing manager at localhost:36067 2023/06/21 00:33:21 checking machine... 2023/06/21 00:33:21 checking revisions... [ 35.034979] kmemleak: Automatic memory scanning thread ended 2023/06/21 00:33:22 testing simple program... [ 35.097346] cgroup: Unknown subsys name 'net' [ 35.147407] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 00:33:21 Registers: info registers vcpu 0 RAX=0000000000000001 RBX=ffff888014448dc0 RCX=ffffffff815343f6 RDX=0000000000000000 RSI=0000000000000008 RDI=ffffffff85d3d350 RBP=ffff888016d96b00 RSP=ffff888015c3f8e0 R8 =0000000000000000 R9 =fffffbfff0ba7a6a R10=ffffffff85d3d357 R11=00000000000b6a61 R12=ffff88807ffdc000 R13=0000000000000006 R14=00000000fffffeb8 R15=ffff888016d96b00 RIP=ffffffff81839905 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 00007f493cc07900 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=00007f493c01c6d0 CR3=000000000c7f0000 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=41186694593634b25c4291d5779b3d36 XMM02=eff9b2d0a8fce9cb000000000011a9b0 XMM03=2c67c8bc2e329bc3000000000011aad8 XMM04=73df11da2667e4ad00000000000ae988 XMM05=c004e2589c9387ca00000000001324a8 XMM06=1a58cb52dc18f6d70000000000130ff0 XMM07=fb795ef6d65770560000000000121498 XMM08=2c67c8bc2e329bc3000000000011aad8 XMM09=00000000000000000000000000000000 XMM10=20200000000020202020202020200000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=1ffffffff0bf497f RBX=ffffffff85fa4bf8 RCX=ffffffff83636c05 RDX=0000000000000000 RSI=ffffffff863b3050 RDI=ffffffff85fa4bf4 RBP=ffffffff85fa4bf4 RSP=ffff888015df75a0 R8 =ffffffff863b3050 R9 =ffff888015df7698 R10=0000000000038001 R11=000000000008a88c R12=ffffffff85fa4c00 R13=ffffffff85fa4bf4 R14=ffffffff85fa4bf4 R15=dffffc0000000000 RIP=ffffffff8112fc7f RFL=00000212 [----A--] 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 00007fcda5e99900 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=00007ffc44d4f000 CR3=000000000cb74000 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