syzkaller login: [ 31.105334] BUG: Bad rss-counter state mm:0000000019f4d76c type:MM_FILEPAGES val:33 [ 31.106639] BUG: Bad rss-counter state mm:0000000019f4d76c type:MM_ANONPAGES val:22 [ 31.159175] ================================================================== [ 31.160072] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 31.161012] Read of size 8 at addr ffff88800e9c24e0 by task sshd/220 [ 31.161787] [ 31.162010] CPU: 1 PID: 220 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 31.163029] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 31.164038] Call Trace: [ 31.164363] [ 31.164661] dump_stack_lvl+0x91/0xf0 [ 31.165195] print_report+0xcc/0x620 [ 31.165690] ? __virt_addr_valid+0x102/0x340 [ 31.166247] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.166879] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.167506] kasan_report+0xbe/0xf0 [ 31.167977] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.168597] vma_interval_tree_remove+0xc75/0xec0 [ 31.169200] vma_prepare+0xc54/0x11a0 [ 31.169680] __split_vma+0x5af/0x950 [ 31.170150] ? __pfx___split_vma+0x10/0x10 [ 31.170681] ? find_held_lock+0x2c/0x110 [ 31.171203] do_vmi_align_munmap+0x2ba/0x11f0 [ 31.171781] ? lock_is_held_type+0x9f/0x120 [ 31.172330] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 31.172943] ? mtree_range_walk+0x632/0x900 [ 31.173500] ? mas_walk+0x5c7/0x7c0 [ 31.173978] do_vmi_munmap+0x1f1/0x2b0 [ 31.174470] mmap_region+0x1f9/0x2660 [ 31.174950] ? vm_mmap_pgoff+0x15c/0x3a0 [ 31.175471] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 31.176187] ? __pfx_lock_acquire+0x10/0x10 [ 31.176725] ? __pfx_mmap_region+0x10/0x10 [ 31.177256] ? security_mmap_addr+0x7d/0xa0 [ 31.177785] ? get_unmapped_area+0x1f5/0x3f0 [ 31.178334] do_mmap+0x854/0xf00 [ 31.178770] vm_mmap_pgoff+0x1a6/0x3a0 [ 31.179285] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 31.179844] ksys_mmap_pgoff+0x3af/0x500 [ 31.180350] do_syscall_64+0x3f/0x90 [ 31.180826] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.181477] RIP: 0033:0x7efe09bebd82 [ 31.181928] 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 [ 31.184065] RSP: 002b:00007fff86b6a668 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 31.184971] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007efe09bebd82 [ 31.185820] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007efe09025000 [ 31.186659] RBP: 00007efe09025000 R08: 0000000000000009 R09: 0000000000001000 [ 31.187519] R10: 0000000000000812 R11: 0000000000000206 R12: 000055950e458b20 [ 31.188372] R13: 00007fff86b6a680 R14: 00007fff86b6a6b0 R15: 00007fff86b6aa10 [ 31.189230] [ 31.189528] [ 31.189742] Allocated by task 213: [ 31.190177] kasan_save_stack+0x22/0x50 [ 31.190687] kasan_set_track+0x25/0x30 [ 31.191181] __kasan_slab_alloc+0x59/0x70 [ 31.191720] kmem_cache_alloc+0x16b/0x370 [ 31.192231] vm_area_dup+0x20/0x160 [ 31.192684] __split_vma+0x170/0x950 [ 31.193149] split_vma+0xc6/0x110 [ 31.193595] mprotect_fixup+0x8d2/0xb30 [ 31.194101] do_mprotect_pkey+0x87e/0xd40 [ 31.194617] __x64_sys_mprotect+0x78/0xc0 [ 31.195138] do_syscall_64+0x3f/0x90 [ 31.195634] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.196277] [ 31.196496] Freed by task 213: [ 31.196883] kasan_save_stack+0x22/0x50 [ 31.197382] kasan_set_track+0x25/0x30 [ 31.197876] kasan_save_free_info+0x2b/0x50 [ 31.198412] __kasan_slab_free+0x10a/0x190 [ 31.198940] kmem_cache_free+0x10d/0x4d0 [ 31.199456] rcu_core+0x8c8/0x2860 [ 31.199903] __do_softirq+0x1b7/0x7d4 [ 31.200379] [ 31.200592] Last potentially related work creation: [ 31.201172] kasan_save_stack+0x22/0x50 [ 31.201673] __kasan_record_aux_stack+0x8e/0xa0 [ 31.202255] __call_rcu_common.constprop.0+0x6a/0xb90 [ 31.202894] remove_vma+0x139/0x170 [ 31.203362] do_vmi_align_munmap+0xd4a/0x11f0 [ 31.203969] do_vmi_munmap+0x1f1/0x2b0 [ 31.204455] __vm_munmap+0x138/0x3a0 [ 31.204919] __x64_sys_munmap+0x59/0x80 [ 31.205417] do_syscall_64+0x3f/0x90 [ 31.205891] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.206540] [ 31.206754] The buggy address belongs to the object at ffff88800e9c2488 [ 31.206754] which belongs to the cache vm_area_struct of size 168 [ 31.208223] The buggy address is located 88 bytes inside of [ 31.208223] freed 168-byte region [ffff88800e9c2488, ffff88800e9c2530) [ 31.209633] [ 31.209847] The buggy address belongs to the physical page: [ 31.210515] page:0000000016dc358a refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xe9c2 [ 31.211633] memcg:ffff88800d72a601 [ 31.212068] flags: 0x100000000000200(slab|node=0|zone=1) [ 31.212727] page_type: 0xffffffff() [ 31.213183] raw: 0100000000000200 ffff8880087a0c80 dead000000000122 0000000000000000 [ 31.214115] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800d72a601 [ 31.215071] page dumped because: kasan: bad access detected [ 31.215793] [ 31.216018] Memory state around the buggy address: [ 31.216637] ffff88800e9c2380: fc fc fc fc 00 00 00 00 00 00 00 00 00 00 00 00 [ 31.217547] ffff88800e9c2400: 00 00 00 00 00 00 00 00 00 fc fc fc fc fc fc fc [ 31.218458] >ffff88800e9c2480: fc fa fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 31.219380] ^ [ 31.220166] ffff88800e9c2500: fb fb fb fb fb fb fc fc fc fc fc fc fc fc fa fb [ 31.221075] ffff88800e9c2580: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 31.221984] ================================================================== [ 31.222941] Disabling lock debugging due to kernel taint [ 33.146030] BUG: Bad rss-counter state mm:000000003f3cc9c5 type:MM_FILEPAGES val:33 [ 33.147394] BUG: Bad rss-counter state mm:000000003f3cc9c5 type:MM_ANONPAGES val:22 [ 33.641572] BUG: Bad rss-counter state mm:00000000f297d26a type:MM_FILEPAGES val:33 [ 33.642697] BUG: Bad rss-counter state mm:00000000f297d26a type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:41672' (ECDSA) to the list of known hosts. 2023/06/21 04:54:10 fuzzer started 2023/06/21 04:54:10 dialing manager at localhost:36067 2023/06/21 04:54:10 checking machine... 2023/06/21 04:54:10 checking revisions... [ 34.400332] kmemleak: Automatic memory scanning thread ended 2023/06/21 04:54:10 testing simple program... [ 34.456731] cgroup: Unknown subsys name 'net' [ 34.496891] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 04:54:09 Registers: info registers vcpu 0 RAX=0000000000000003 RBX=ffff88800e26f2e0 RCX=1ffffffff0ba7c92 RDX=0000000000000000 RSI=0000000000000008 RDI=ffffffff813710b9 RBP=ffff88806ce3a3d8 RSP=ffff888010347d28 R8 =0000000000000000 R9 =0000000000000000 R10=ffffffff85d3d357 R11=00000000000b6a61 R12=000000000000008f R13=ffff88806ce3a3a8 R14=ffff88806ce3a2c0 R15=0000000000000000 RIP=ffffffff845118ab 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 00007fe225c17900 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=00007fa052a8c650 CR3=00000000096c0000 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=ffffffffffffffffffffffffffffffff XMM01=30306234386136303638616663356134 XMM02=38303062343861363036386166633561 XMM03=2f6c616e72756f6a2f676f6c2f6e7572 XMM04=5e93b8f144d0188900000000000ae988 XMM05=775dccaa72b35d640000000000132d38 XMM06=4fda316b135da52b0000000000131b28 XMM07=00000000000000000000000000000000 XMM08=415453454d49545f454d49544c414552 XMM09=00000000000000000000000000000000 XMM10=20200000000020202020202020200000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=0000000000000000 RBX=0000000000000000 RCX=0000000000000000 RDX=ffff8880158d0000 RSI=ffffffff8386be45 RDI=0000000000000005 RBP=00000000000000e5 RSP=ffff88800f9d7b18 R8 =0000000000000005 R9 =0000000000000000 R10=0000000000000000 R11=0000000000000000 R12=00000000fffff000 R13=ffff888008fe8ea0 R14=ffff88800f9d7b70 R15=0000000000000000 RIP=ffffffff813744b6 RFL=00000293 [--S-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 =0018 0000000000000000 ffffffff 00c09300 DPL=0 DS [-WA] DS =0000 0000000000000000 00000000 00000000 FS =0000 00007fa0524d7900 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=00007ffdc14c4000 CR3=000000000e412000 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