syzkaller login: [ 30.562317] BUG: Bad rss-counter state mm:000000001b5f3241 type:MM_FILEPAGES val:33 [ 30.563336] BUG: Bad rss-counter state mm:000000001b5f3241 type:MM_ANONPAGES val:22 [ 30.741048] ================================================================== [ 30.742015] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 30.742995] Read of size 8 at addr ffff8880099175c8 by task sshd/220 [ 30.743996] [ 30.744223] CPU: 1 PID: 220 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 30.745120] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 30.746149] Call Trace: [ 30.746482] [ 30.746777] dump_stack_lvl+0x91/0xf0 [ 30.747291] print_report+0xcc/0x620 [ 30.747824] ? __virt_addr_valid+0x102/0x340 [ 30.748403] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.749040] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.749687] kasan_report+0xbe/0xf0 [ 30.750191] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.750837] vma_interval_tree_remove+0xc75/0xec0 [ 30.751469] vma_prepare+0xc54/0x11a0 [ 30.751972] __split_vma+0x5af/0x950 [ 30.752467] ? __pfx___split_vma+0x10/0x10 [ 30.753024] ? find_held_lock+0x2c/0x110 [ 30.753561] do_vmi_align_munmap+0x2ba/0x11f0 [ 30.754142] ? lock_is_held_type+0x9f/0x120 [ 30.754700] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 30.755328] ? mtree_range_walk+0x632/0x900 [ 30.755916] ? mas_walk+0x5c7/0x7c0 [ 30.756415] do_vmi_munmap+0x1f1/0x2b0 [ 30.756926] mmap_region+0x1f9/0x2660 [ 30.757421] ? vm_mmap_pgoff+0x15c/0x3a0 [ 30.757948] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 30.758692] ? __pfx_lock_acquire+0x10/0x10 [ 30.759243] ? __pfx_mmap_region+0x10/0x10 [ 30.759797] ? security_mmap_addr+0x7d/0xa0 [ 30.760343] ? get_unmapped_area+0x1f5/0x3f0 [ 30.760918] do_mmap+0x854/0xf00 [ 30.761366] vm_mmap_pgoff+0x1a6/0x3a0 [ 30.761875] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 30.762453] ksys_mmap_pgoff+0x3af/0x500 [ 30.762975] do_syscall_64+0x3f/0x90 [ 30.763478] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.764153] RIP: 0033:0x7f1ef4272d82 [ 30.764625] 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 [ 30.766803] RSP: 002b:00007ffc85e6f208 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 30.767773] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f1ef4272d82 [ 30.768649] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f1ef36ac000 [ 30.769518] RBP: 00007f1ef36ac000 R08: 0000000000000009 R09: 0000000000001000 [ 30.770383] R10: 0000000000000812 R11: 0000000000000206 R12: 000055af3068fec0 [ 30.771251] R13: 00007ffc85e6f220 R14: 00007ffc85e6f250 R15: 00007ffc85e6f5b0 [ 30.772137] [ 30.772438] [ 30.772658] Allocated by task 213: [ 30.773097] kasan_save_stack+0x22/0x50 [ 30.773610] kasan_set_track+0x25/0x30 [ 30.774119] __kasan_slab_alloc+0x59/0x70 [ 30.774653] kmem_cache_alloc+0x16b/0x370 [ 30.775185] vm_area_dup+0x20/0x160 [ 30.775652] __split_vma+0x170/0x950 [ 30.776126] split_vma+0xc6/0x110 [ 30.776572] mprotect_fixup+0x8d2/0xb30 [ 30.777090] do_mprotect_pkey+0x87e/0xd40 [ 30.777618] __x64_sys_mprotect+0x78/0xc0 [ 30.778152] do_syscall_64+0x3f/0x90 [ 30.778635] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.779290] [ 30.779523] Freed by task 213: [ 30.779926] kasan_save_stack+0x22/0x50 [ 30.780442] kasan_set_track+0x25/0x30 [ 30.780939] kasan_save_free_info+0x2b/0x50 [ 30.781487] __kasan_slab_free+0x10a/0x190 [ 30.782027] kmem_cache_free+0x10d/0x4d0 [ 30.782545] rcu_core+0x8c8/0x2860 [ 30.783001] __do_softirq+0x1b7/0x7d4 [ 30.783502] [ 30.783724] Last potentially related work creation: [ 30.784325] kasan_save_stack+0x22/0x50 [ 30.784905] __kasan_record_aux_stack+0x8e/0xa0 [ 30.785504] __call_rcu_common.constprop.0+0x6a/0xb90 [ 30.786166] remove_vma+0x139/0x170 [ 30.786627] do_vmi_align_munmap+0xd4a/0x11f0 [ 30.787198] do_vmi_munmap+0x1f1/0x2b0 [ 30.787709] __vm_munmap+0x138/0x3a0 [ 30.788194] __x64_sys_munmap+0x59/0x80 [ 30.788694] do_syscall_64+0x3f/0x90 [ 30.789172] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.789817] [ 30.790036] The buggy address belongs to the object at ffff888009917570 [ 30.790036] which belongs to the cache vm_area_struct of size 168 [ 30.791538] The buggy address is located 88 bytes inside of [ 30.791538] freed 168-byte region [ffff888009917570, ffff888009917618) [ 30.792965] [ 30.793180] The buggy address belongs to the physical page: [ 30.793850] page:000000009c392035 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x9917 [ 30.794959] memcg:ffff888019f4d901 [ 30.795393] flags: 0x100000000000200(slab|node=0|zone=1) [ 30.796042] page_type: 0xffffffff() [ 30.796504] raw: 0100000000000200 ffff8880087a0c80 dead000000000122 0000000000000000 [ 30.797439] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff888019f4d901 [ 30.798374] page dumped because: kasan: bad access detected [ 30.799043] [ 30.799258] Memory state around the buggy address: [ 30.799860] ffff888009917480: fc 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 30.800724] ffff888009917500: 00 00 00 00 00 00 fc fc fc fc fc fc fc fc fa fb [ 30.801585] >ffff888009917580: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 30.802452] ^ [ 30.803124] ffff888009917600: fb fb fb fc fc fc fc fc fc fc fc fa fb fb fb fb [ 30.803997] ffff888009917680: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 30.804848] ================================================================== [ 30.805752] Disabling lock debugging due to kernel taint [ 33.215584] BUG: Bad rss-counter state mm:00000000941c04f8 type:MM_FILEPAGES val:33 [ 33.217208] BUG: Bad rss-counter state mm:00000000941c04f8 type:MM_ANONPAGES val:22 [ 33.672020] BUG: Bad rss-counter state mm:00000000e7d8c9d8 type:MM_FILEPAGES val:33 [ 33.673018] BUG: Bad rss-counter state mm:00000000e7d8c9d8 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:56732' (ECDSA) to the list of known hosts. 2023/06/20 22:43:01 fuzzer started 2023/06/20 22:43:01 dialing manager at localhost:36067 2023/06/20 22:43:01 checking machine... 2023/06/20 22:43:01 checking revisions... [ 34.409053] kmemleak: Automatic memory scanning thread ended 2023/06/20 22:43:02 testing simple program... [ 34.463249] cgroup: Unknown subsys name 'net' [ 34.525168] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 22:43:01 Registers: info registers vcpu 0 RAX=0000000000000000 RBX=ffff888015e3f758 RCX=ffffffff812d86ea RDX=0000000000000000 RSI=0000000000000008 RDI=ffffffff85d3d350 RBP=ffff888015e3f7b0 RSP=ffff888015e3f740 R8 =0000000000000000 R9 =fffffbfff0ba7a6a R10=ffffffff85d3d357 R11=00000000000b6a61 R12=ffff888015e3f820 R13=0000000000000000 R14=ffff888017d63680 R15=0000000000000000 RIP=ffffffff81130399 RFL=00000207 [-----PC] 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 00007f72ae3cf900 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=00007fff6f1ae000 CR3=0000000015cba000 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=dffffc0000000000 RBX=ffffffff81809add RCX=0000000000000001 RDX=1ffff1100d9e135e RSI=ffff88806cf09e10 RDI=ffffffff81809add RBP=ffff88806cf09af0 RSP=ffff88806cf09a68 R8 =0000000000000001 R9 =ffff88806cf09ad8 R10=0000000000038001 R11=0000000000020db7 R12=ffff88806cf09b60 R13=0000000000000000 R14=ffff888008d951c0 R15=ffff88801a1b5d90 RIP=ffffffff811fc7a0 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 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=00007fc4676f83f0 CR3=000000000c670000 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=6032ac1d5786eba4684a7c39e6e5437f XMM02=2c67c8bc2e329bc30000000000119590 XMM03=fb795ef6d657705600000000001210b8 XMM04=0d80ab634981f73000000000000ae988 XMM05=e4cb8bb95a7664b60000000000130f90 XMM06=c291bd5c70af25b90000000000130e18 XMM07=e042d86d42eb936e0000000000121338 XMM08=e4a4e3861bda371300000000001195f0 XMM09=00000000000000000000000000000000 XMM10=20200000000020202020202020200000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000