syzkaller login: [ 61.589212] BUG: Bad rss-counter state mm:000000004effd90f type:MM_FILEPAGES val:33 [ 61.590493] BUG: Bad rss-counter state mm:000000004effd90f type:MM_ANONPAGES val:22 [ 61.750355] ================================================================== [ 61.751315] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 61.752305] Read of size 8 at addr ffff88800e6ef798 by task sshd/221 [ 61.753090] [ 61.753316] CPU: 1 PID: 221 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 61.754394] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 61.755439] Call Trace: [ 61.755777] [ 61.756098] dump_stack_lvl+0x91/0xf0 [ 61.756599] print_report+0xcc/0x620 [ 61.757093] ? __virt_addr_valid+0x102/0x340 [ 61.757673] ? vma_interval_tree_remove+0xc75/0xec0 [ 61.758296] ? vma_interval_tree_remove+0xc75/0xec0 [ 61.758940] kasan_report+0xbe/0xf0 [ 61.759423] ? vma_interval_tree_remove+0xc75/0xec0 [ 61.760041] vma_interval_tree_remove+0xc75/0xec0 [ 61.760643] vma_prepare+0xc54/0x11a0 [ 61.761124] __split_vma+0x5af/0x950 [ 61.761605] ? __pfx___split_vma+0x10/0x10 [ 61.762142] ? find_held_lock+0x2c/0x110 [ 61.762662] do_vmi_align_munmap+0x2ba/0x11f0 [ 61.763244] ? lock_is_held_type+0x9f/0x120 [ 61.763782] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 61.764395] ? mtree_range_walk+0x632/0x900 [ 61.764947] ? mas_walk+0x5c7/0x7c0 [ 61.765428] do_vmi_munmap+0x1f1/0x2b0 [ 61.765942] mmap_region+0x1f9/0x2660 [ 61.766427] ? vm_mmap_pgoff+0x15c/0x3a0 [ 61.766957] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 61.767692] ? __pfx_lock_acquire+0x10/0x10 [ 61.768237] ? __pfx_mmap_region+0x10/0x10 [ 61.768796] ? security_mmap_addr+0x7d/0xa0 [ 61.769348] ? get_unmapped_area+0x1f5/0x3f0 [ 61.769915] do_mmap+0x854/0xf00 [ 61.770363] vm_mmap_pgoff+0x1a6/0x3a0 [ 61.770867] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 61.771432] ksys_mmap_pgoff+0x3af/0x500 [ 61.771933] do_syscall_64+0x3f/0x90 [ 61.772417] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 61.773071] RIP: 0033:0x7f07dc1a8d82 [ 61.773528] 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 [ 61.775638] RSP: 002b:00007fff8b130188 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 61.776532] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f07dc1a8d82 [ 61.777371] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f07db5e2000 [ 61.778233] RBP: 00007f07db5e2000 R08: 0000000000000009 R09: 0000000000001000 [ 61.779069] R10: 0000000000000812 R11: 0000000000000206 R12: 000055ca9fda2ec0 [ 61.779910] R13: 00007fff8b1301a0 R14: 00007fff8b1301d0 R15: 00007fff8b130530 [ 61.780760] [ 61.781048] [ 61.781260] Allocated by task 214: [ 61.781696] kasan_save_stack+0x22/0x50 [ 61.782206] kasan_set_track+0x25/0x30 [ 61.782700] __kasan_slab_alloc+0x59/0x70 [ 61.783222] kmem_cache_alloc+0x16b/0x370 [ 61.783736] vm_area_dup+0x20/0x160 [ 61.784187] __split_vma+0x170/0x950 [ 61.784648] split_vma+0xc6/0x110 [ 61.785080] mprotect_fixup+0x8d2/0xb30 [ 61.785590] do_mprotect_pkey+0x87e/0xd40 [ 61.786113] __x64_sys_mprotect+0x78/0xc0 [ 61.786638] do_syscall_64+0x3f/0x90 [ 61.787110] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 61.787742] [ 61.787955] Freed by task 214: [ 61.788341] kasan_save_stack+0x22/0x50 [ 61.788846] kasan_set_track+0x25/0x30 [ 61.789330] kasan_save_free_info+0x2b/0x50 [ 61.789885] __kasan_slab_free+0x10a/0x190 [ 61.790408] kmem_cache_free+0x10d/0x4d0 [ 61.790912] rcu_core+0x8c8/0x2860 [ 61.791351] __do_softirq+0x1b7/0x7d4 [ 61.791824] [ 61.792036] Last potentially related work creation: [ 61.792617] kasan_save_stack+0x22/0x50 [ 61.793112] __kasan_record_aux_stack+0x8e/0xa0 [ 61.793689] __call_rcu_common.constprop.0+0x6a/0xb90 [ 61.794331] remove_vma+0x139/0x170 [ 61.794784] do_vmi_align_munmap+0xd4a/0x11f0 [ 61.795367] do_vmi_munmap+0x1f1/0x2b0 [ 61.795848] __vm_munmap+0x138/0x3a0 [ 61.796310] __x64_sys_munmap+0x59/0x80 [ 61.796806] do_syscall_64+0x3f/0x90 [ 61.797276] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 61.797935] [ 61.798146] The buggy address belongs to the object at ffff88800e6ef740 [ 61.798146] which belongs to the cache vm_area_struct of size 168 [ 61.799595] The buggy address is located 88 bytes inside of [ 61.799595] freed 168-byte region [ffff88800e6ef740, ffff88800e6ef7e8) [ 61.800992] [ 61.801211] The buggy address belongs to the physical page: [ 61.801877] page:00000000fbd8c76f refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xe6ef [ 61.802958] memcg:ffff8880096d0f01 [ 61.803384] flags: 0x100000000000200(slab|node=0|zone=1) [ 61.804028] page_type: 0xffffffff() [ 61.804473] raw: 0100000000000200 ffff8880087a0c80 dead000000000122 0000000000000000 [ 61.805376] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff8880096d0f01 [ 61.806295] page dumped because: kasan: bad access detected [ 61.806956] [ 61.807168] Memory state around the buggy address: [ 61.807747] ffff88800e6ef680: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 61.808599] ffff88800e6ef700: fc fc fc fc fc fc fc fc fa fb fb fb fb fb fb fb [ 61.809472] >ffff88800e6ef780: fb fb fb fb fb fb fb fb fb fb fb fb fb fc fc fc [ 61.810346] ^ [ 61.810835] ffff88800e6ef800: fc fc fc fc fc fa fb fb fb fb fb fb fb fb fb fb [ 61.811695] ffff88800e6ef880: fb fb fb fb fb fb fb fb fb fb fc fc fc fc fc fc [ 61.812546] ================================================================== [ 61.813480] Disabling lock debugging due to kernel taint [ 63.797323] BUG: Bad rss-counter state mm:00000000a0534bd2 type:MM_FILEPAGES val:33 [ 63.798330] BUG: Bad rss-counter state mm:00000000a0534bd2 type:MM_ANONPAGES val:22 [ 64.354343] BUG: Bad rss-counter state mm:0000000044b115ea type:MM_FILEPAGES val:33 [ 64.355563] BUG: Bad rss-counter state mm:0000000044b115ea type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:5668' (ECDSA) to the list of known hosts. 2023/06/20 10:58:49 fuzzer started 2023/06/20 10:58:49 dialing manager at localhost:36067 2023/06/20 10:58:49 checking machine... 2023/06/20 10:58:49 checking revisions... [ 65.017064] kmemleak: Automatic memory scanning thread ended 2023/06/20 10:58:49 testing simple program... [ 65.055924] cgroup: Unknown subsys name 'net' [ 65.118664] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 10:58:49 Registers: info registers vcpu 0 RAX=1ffffffff0bb133f RBX=ffffffff85d899f8 RCX=ffffffff810bd056 RDX=0000000000000000 RSI=ffffffff8608a556 RDI=ffffffff85d899f8 RBP=ffffffff85d899f8 RSP=ffff88806ce09998 R8 =ffffffff8608a556 R9 =ffff88806ce09a90 R10=0000000000038001 R11=0000000000003c0d R12=ffffffff85d899f8 R13=ffffffff85d899f8 R14=ffffffff85d899f8 R15=dffffc0000000000 RIP=ffffffff8112fc7f RFL=00000216 [----AP-] 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 00007f1521842900 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=00007f1520cb20f0 CR3=000000000d920000 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=e68a715419f2a05700000000000ae988 XMM05=57efe81c57dd37ea0000000000132a60 XMM06=c291bd5c70af25b90000000000131850 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=0000000000008000 RCX=0000000000000000 RDX=1ffff11001c6ecfa RSI=ffffffff818524ef RDI=0000000000000005 RBP=ffff88800e376780 RSP=ffff888019e0fa90 R8 =0000000000000005 R9 =0000000000000000 R10=0000000000000000 R11=0000000000000001 R12=0000000000000000 R13=ffff88800e376900 R14=0000000000000000 R15=ffff888019af4a30 RIP=ffffffff81852505 RFL=00000216 [----AP-] 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 00007fd16d9a0900 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=00007fffe37a5000 CR3=000000000b96e000 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