syzkaller login: [ 30.678062] BUG: Bad rss-counter state mm:00000000f78a66ab type:MM_FILEPAGES val:33 [ 30.679301] BUG: Bad rss-counter state mm:00000000f78a66ab type:MM_ANONPAGES val:22 [ 30.718101] ================================================================== [ 30.719052] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 30.720029] Read of size 8 at addr ffff888019f6cd08 by task sshd/219 [ 30.720788] [ 30.721002] CPU: 0 PID: 219 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 30.721856] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 30.722852] Call Trace: [ 30.723164] [ 30.723442] dump_stack_lvl+0x91/0xf0 [ 30.723915] print_report+0xcc/0x620 [ 30.724380] ? __virt_addr_valid+0x102/0x340 [ 30.724912] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.725512] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.726110] kasan_report+0xbe/0xf0 [ 30.726589] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.727187] vma_interval_tree_remove+0xc75/0xec0 [ 30.727772] vma_prepare+0xc54/0x11a0 [ 30.728246] __split_vma+0x5af/0x950 [ 30.728715] ? __pfx___split_vma+0x10/0x10 [ 30.729235] ? find_held_lock+0x2c/0x110 [ 30.729751] do_vmi_align_munmap+0x2ba/0x11f0 [ 30.730324] ? lock_is_held_type+0x9f/0x120 [ 30.730845] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 30.731437] ? mtree_range_walk+0x632/0x900 [ 30.731986] ? mas_walk+0x5c7/0x7c0 [ 30.732445] do_vmi_munmap+0x1f1/0x2b0 [ 30.732929] mmap_region+0x1f9/0x2660 [ 30.733394] ? vm_mmap_pgoff+0x15c/0x3a0 [ 30.733889] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 30.734586] ? __pfx_lock_acquire+0x10/0x10 [ 30.735110] ? __pfx_mmap_region+0x10/0x10 [ 30.735635] ? security_mmap_addr+0x7d/0xa0 [ 30.736156] ? get_unmapped_area+0x1f5/0x3f0 [ 30.736694] do_mmap+0x854/0xf00 [ 30.737136] vm_mmap_pgoff+0x1a6/0x3a0 [ 30.737621] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 30.738185] ksys_mmap_pgoff+0x3af/0x500 [ 30.738705] do_syscall_64+0x3f/0x90 [ 30.739184] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.739820] RIP: 0033:0x7f29b7883d82 [ 30.740268] 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 [ 30.742347] RSP: 002b:00007ffeed3dee78 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 30.743228] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f29b7883d82 [ 30.744051] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f29b6cbd000 [ 30.744871] RBP: 00007f29b6cbd000 R08: 0000000000000009 R09: 0000000000001000 [ 30.745697] R10: 0000000000000812 R11: 0000000000000206 R12: 000055b6df7c1d90 [ 30.746527] R13: 00007ffeed3dee90 R14: 00007ffeed3deec0 R15: 00007ffeed3df220 [ 30.747375] [ 30.747660] [ 30.747875] Allocated by task 212: [ 30.748293] kasan_save_stack+0x22/0x50 [ 30.748784] kasan_set_track+0x25/0x30 [ 30.749264] __kasan_slab_alloc+0x59/0x70 [ 30.749785] kmem_cache_alloc+0x16b/0x370 [ 30.750306] vm_area_dup+0x20/0x160 [ 30.750749] __split_vma+0x170/0x950 [ 30.751207] split_vma+0xc6/0x110 [ 30.751641] mprotect_fixup+0x8d2/0xb30 [ 30.752129] do_mprotect_pkey+0x87e/0xd40 [ 30.752638] __x64_sys_mprotect+0x78/0xc0 [ 30.753148] do_syscall_64+0x3f/0x90 [ 30.753610] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.754240] [ 30.754450] Freed by task 212: [ 30.754831] kasan_save_stack+0x22/0x50 [ 30.755322] kasan_set_track+0x25/0x30 [ 30.755800] kasan_save_free_info+0x2b/0x50 [ 30.756463] __kasan_slab_free+0x10a/0x190 [ 30.757000] kmem_cache_free+0x10d/0x4d0 [ 30.757518] rcu_core+0x8c8/0x2860 [ 30.757968] __do_softirq+0x1b7/0x7d4 [ 30.758482] [ 30.758702] Last potentially related work creation: [ 30.759300] kasan_save_stack+0x22/0x50 [ 30.759819] __kasan_record_aux_stack+0x8e/0xa0 [ 30.760402] __call_rcu_common.constprop.0+0x6a/0xb90 [ 30.761045] remove_vma+0x139/0x170 [ 30.761500] do_vmi_align_munmap+0xd4a/0x11f0 [ 30.762081] do_vmi_munmap+0x1f1/0x2b0 [ 30.762587] __vm_munmap+0x138/0x3a0 [ 30.763055] __x64_sys_munmap+0x59/0x80 [ 30.763556] do_syscall_64+0x3f/0x90 [ 30.764038] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.764694] [ 30.764917] The buggy address belongs to the object at ffff888019f6ccb0 [ 30.764917] which belongs to the cache vm_area_struct of size 168 [ 30.766418] The buggy address is located 88 bytes inside of [ 30.766418] freed 168-byte region [ffff888019f6ccb0, ffff888019f6cd58) [ 30.767872] [ 30.768103] The buggy address belongs to the physical page: [ 30.768783] page:00000000d4ba82d8 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x19f6c [ 30.769895] memcg:ffff88801a321601 [ 30.770352] flags: 0x100000000000200(slab|node=0|zone=1) [ 30.771005] page_type: 0xffffffff() [ 30.771465] raw: 0100000000000200 ffff8880087a0c80 dead000000000122 0000000000000000 [ 30.772391] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88801a321601 [ 30.773300] page dumped because: kasan: bad access detected [ 30.773968] [ 30.774184] Memory state around the buggy address: [ 30.774778] ffff888019f6cc00: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 fc fc [ 30.775643] ffff888019f6cc80: fc fc fc fc fc fc fa fb fb fb fb fb fb fb fb fb [ 30.776502] >ffff888019f6cd00: fb fb fb fb fb fb fb fb fb fb fb fc fc fc fc fc [ 30.777356] ^ [ 30.777796] ffff888019f6cd80: fc fc fc fa fb fb fb fb fb fb fb fb fb fb fb fb [ 30.778679] ffff888019f6ce00: fb fb fb fb fb fb fb fb fc fc fc fc fc fc fc fc [ 30.779543] ================================================================== [ 30.780585] Disabling lock debugging due to kernel taint [ 32.704449] BUG: Bad rss-counter state mm:00000000325d141e type:MM_FILEPAGES val:33 [ 32.705467] BUG: Bad rss-counter state mm:00000000325d141e type:MM_ANONPAGES val:22 [ 33.241440] BUG: Bad rss-counter state mm:000000009822cebf type:MM_FILEPAGES val:33 [ 33.242387] BUG: Bad rss-counter state mm:000000009822cebf type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:32823' (ECDSA) to the list of known hosts. 2023/06/20 17:55:53 fuzzer started 2023/06/20 17:55:54 dialing manager at localhost:36067 2023/06/20 17:55:54 checking machine... 2023/06/20 17:55:54 checking revisions... [ 33.971940] kmemleak: Automatic memory scanning thread ended 2023/06/20 17:55:54 testing simple program... [ 34.020119] cgroup: Unknown subsys name 'net' [ 34.076062] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 17:55:53 Registers: info registers vcpu 0 RAX=0000000000000000 RBX=ffff8880143d7e60 RCX=1ffff1100287af21 RDX=ffff8880143d8000 RSI=0000000000000000 RDI=0000000000000000 RBP=ffff88800885e1c0 RSP=ffff8880143d7998 R8 =0000000000000006 R9 =0000000000000030 R10=000000000000001c R11=0000000000000001 R12=000000000000001c R13=0000000000000053 R14=ffff8880143d7a70 R15=0000000000000000 RIP=ffffffff814c0404 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 00007f4cf073a900 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=00007f4cefb3ae10 CR3=0000000009c66000 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=756f6a2f646d65747379732f6e75722f XMM01=00676f6c7379732f6c616e72756f6a2f XMM02=756f6a2f646d65747379732f6e75722f XMM03=006c616e72756f6a2f646d6574737973 XMM04=94da6749d992c65600000000000ae988 XMM05=68441c62ca0634a40000000000132728 XMM06=547fe58843a5f9fd00000000001314c8 XMM07=fb795ef6d65770560000000000121730 XMM08=4f5453444600273d67736d000d0a0920 XMM09=00000000000000000000000000000000 XMM10=20200000000020202020202020200000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=000000000008b60d RBX=0000000000000001 RCX=ffffffff8366b8de RDX=000000000008b616 RSI=00000000000266b8 RDI=00000000001a2227 RBP=ffff888016b9f600 RSP=ffff888016b9f538 R8 =ffffffff863b8156 R9 =ffff888016b9f5e8 R10=0000000000038001 R11=000000000008b60d R12=ffff888016b9f608 R13=ffff888016b9f5f0 R14=ffff888016b9f5e9 R15=ffff888016b9f5a8 RIP=ffffffff81130853 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 00007fd69ba1f900 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=00007fd69bfd6618 CR3=000000000fa72000 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=563412feff00545000000000000080fe XMM01=6e69676f6c5f6d61702c78756e696c65 XMM02=755f6d61702c74696d7265705f6d6170 XMM03=2c766e655f6d61702c7374696d696c5f XMM04=6d61702c766e655f6d61702c7374696d XMM05=78696e755f6d61702c74696d7265705f XMM06=6469756e69676f6c5f6d61702c78756e XMM07=672065736f6c635f6e6f69737365733a XMM08=61662029286e65706f5f746964756100 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000