syzkaller login: [ 30.381835] BUG: Bad rss-counter state mm:000000005da6d7b2 type:MM_FILEPAGES val:33 [ 30.383024] BUG: Bad rss-counter state mm:000000005da6d7b2 type:MM_ANONPAGES val:22 [ 30.424994] ================================================================== [ 30.426236] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 30.427248] Read of size 8 at addr ffff88800e71c6b0 by task sshd/219 [ 30.428064] [ 30.428278] CPU: 1 PID: 219 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 30.429140] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 30.430106] Call Trace: [ 30.430427] [ 30.430715] dump_stack_lvl+0x91/0xf0 [ 30.431207] print_report+0xcc/0x620 [ 30.431709] ? __virt_addr_valid+0x102/0x340 [ 30.432254] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.432872] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.433480] kasan_report+0xbe/0xf0 [ 30.433963] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.434585] vma_interval_tree_remove+0xc75/0xec0 [ 30.435186] vma_prepare+0xc54/0x11a0 [ 30.435689] __split_vma+0x5af/0x950 [ 30.436155] ? __pfx___split_vma+0x10/0x10 [ 30.436679] ? find_held_lock+0x2c/0x110 [ 30.437198] do_vmi_align_munmap+0x2ba/0x11f0 [ 30.437774] ? lock_is_held_type+0x9f/0x120 [ 30.438315] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 30.438919] ? mtree_range_walk+0x632/0x900 [ 30.439523] ? mas_walk+0x5c7/0x7c0 [ 30.439999] do_vmi_munmap+0x1f1/0x2b0 [ 30.440490] mmap_region+0x1f9/0x2660 [ 30.440973] ? vm_mmap_pgoff+0x15c/0x3a0 [ 30.441481] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 30.442193] ? __pfx_lock_acquire+0x10/0x10 [ 30.442733] ? __pfx_mmap_region+0x10/0x10 [ 30.443260] ? security_mmap_addr+0x7d/0xa0 [ 30.443813] ? get_unmapped_area+0x1f5/0x3f0 [ 30.444362] do_mmap+0x854/0xf00 [ 30.444807] vm_mmap_pgoff+0x1a6/0x3a0 [ 30.445303] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 30.445864] ksys_mmap_pgoff+0x3af/0x500 [ 30.446369] do_syscall_64+0x3f/0x90 [ 30.446850] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.447510] RIP: 0033:0x7fd1c1db2d82 [ 30.447974] 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 [ 30.450087] RSP: 002b:00007ffdfd4f6b38 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 30.450996] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007fd1c1db2d82 [ 30.451861] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007fd1c11ec000 [ 30.452708] RBP: 00007fd1c11ec000 R08: 0000000000000009 R09: 0000000000001000 [ 30.453555] R10: 0000000000000812 R11: 0000000000000206 R12: 0000555802c3af60 [ 30.454398] R13: 00007ffdfd4f6b50 R14: 00007ffdfd4f6b80 R15: 00007ffdfd4f6ee0 [ 30.455246] [ 30.455549] [ 30.455766] Allocated by task 212: [ 30.456190] kasan_save_stack+0x22/0x50 [ 30.456694] kasan_set_track+0x25/0x30 [ 30.457183] __kasan_slab_alloc+0x59/0x70 [ 30.457708] kmem_cache_alloc+0x16b/0x370 [ 30.458222] vm_area_dup+0x20/0x160 [ 30.458687] __split_vma+0x170/0x950 [ 30.459153] split_vma+0xc6/0x110 [ 30.459601] mprotect_fixup+0x8d2/0xb30 [ 30.460103] do_mprotect_pkey+0x87e/0xd40 [ 30.460622] __x64_sys_mprotect+0x78/0xc0 [ 30.461142] do_syscall_64+0x3f/0x90 [ 30.461618] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.462269] [ 30.462488] Freed by task 212: [ 30.462883] kasan_save_stack+0x22/0x50 [ 30.463405] kasan_set_track+0x25/0x30 [ 30.463899] kasan_save_free_info+0x2b/0x50 [ 30.464438] __kasan_slab_free+0x10a/0x190 [ 30.464976] kmem_cache_free+0x10d/0x4d0 [ 30.465490] rcu_core+0x8c8/0x2860 [ 30.466000] __do_softirq+0x1b7/0x7d4 [ 30.466486] [ 30.466708] Last potentially related work creation: [ 30.467299] kasan_save_stack+0x22/0x50 [ 30.467827] __kasan_record_aux_stack+0x8e/0xa0 [ 30.468419] __call_rcu_common.constprop.0+0x6a/0xb90 [ 30.469085] remove_vma+0x139/0x170 [ 30.469550] do_vmi_align_munmap+0xd4a/0x11f0 [ 30.470128] do_vmi_munmap+0x1f1/0x2b0 [ 30.470631] __vm_munmap+0x138/0x3a0 [ 30.471112] __x64_sys_munmap+0x59/0x80 [ 30.471638] do_syscall_64+0x3f/0x90 [ 30.472129] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.472796] [ 30.473018] The buggy address belongs to the object at ffff88800e71c658 [ 30.473018] which belongs to the cache vm_area_struct of size 168 [ 30.474530] The buggy address is located 88 bytes inside of [ 30.474530] freed 168-byte region [ffff88800e71c658, ffff88800e71c700) [ 30.475999] [ 30.476220] The buggy address belongs to the physical page: [ 30.476898] page:000000003f6ad524 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xe71c [ 30.478014] memcg:ffff88800e096501 [ 30.478454] flags: 0x100000000000200(slab|node=0|zone=1) [ 30.479117] page_type: 0xffffffff() [ 30.479596] raw: 0100000000000200 ffff8880087a0c80 dead000000000122 0000000000000000 [ 30.480553] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800e096501 [ 30.481495] page dumped because: kasan: bad access detected [ 30.482175] [ 30.482397] Memory state around the buggy address: [ 30.482996] ffff88800e71c580: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 30.483893] ffff88800e71c600: 00 00 00 fc fc fc fc fc fc fc fc fa fb fb fb fb [ 30.484785] >ffff88800e71c680: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 30.485665] ^ [ 30.486263] ffff88800e71c700: fc fc fc fc fc fc fc fc fa fb fb fb fb fb fb fb [ 30.487152] ffff88800e71c780: fb fb fb fb fb fb fb fb fb fb fb fb fb fc fc fc [ 30.488054] ================================================================== [ 30.488999] Disabling lock debugging due to kernel taint [ 32.715386] BUG: Bad rss-counter state mm:00000000c9fa9d35 type:MM_FILEPAGES val:33 [ 32.716381] BUG: Bad rss-counter state mm:00000000c9fa9d35 type:MM_ANONPAGES val:22 [ 33.264874] BUG: Bad rss-counter state mm:0000000059e82295 type:MM_FILEPAGES val:33 [ 33.266052] BUG: Bad rss-counter state mm:0000000059e82295 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:64630' (ECDSA) to the list of known hosts. 2023/06/20 21:20:35 fuzzer started 2023/06/20 21:20:35 dialing manager at localhost:36067 2023/06/20 21:20:35 checking machine... 2023/06/20 21:20:35 checking revisions... [ 33.919933] kmemleak: Automatic memory scanning thread ended 2023/06/20 21:20:35 testing simple program... [ 33.966314] cgroup: Unknown subsys name 'net' [ 34.011592] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 21:20:35 Registers: info registers vcpu 0 RAX=0000000000000000 RBX=0000000000000000 RCX=ffffea0000641e00 RDX=0000000000000000 RSI=ffff888019079be8 RDI=ffffed100320f37d RBP=ffffffff813782f8 RSP=ffff88806ce09e00 R8 =0000000000000178 R9 =0000000000000000 R10=ffffffff85d3d357 R11=00000000000b6a61 R12=ffff888019079be8 R13=ffff8880087b8500 R14=ffffffff813782f8 R15=ffff88800e37bd80 RIP=ffffffff8180f258 RFL=00000286 [--S--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 00007fc4a6719700 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=00007ff1fb38d0b0 CR3=0000000015b6e000 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=2035333a30323a3132203032206e754a XMM01=73732878696e755f6d6170203a5d3832 XMM02=65736f6c63206e6f6973736573203a29 XMM03=755f6d6170203a5d3832325b64687373 XMM04=69662068637573206f4e203a656c6163 XMM05=3a656c696620766e65206e65706f206f XMM06=65733a6468737328766e655f6d617020 XMM07=6b7a79732034333a30323a3132203032 XMM08=3d656e696c646d632022656369767265 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=0000000080000000 RBX=dffffc0000000000 RCX=0000000000000000 RDX=ffff888016ba51c0 RSI=ffffffff844a5c07 RDI=ffff8880168d7e30 RBP=00007ff1fb38c618 RSP=ffff8880168d7de0 R8 =0000000000000005 R9 =0000000000000000 R10=0000000000000000 R11=0000000000000000 R12=ffff88801a372740 R13=00007ff1fb38c618 R14=0000000000000040 R15=ffff888015a3c0c0 RIP=ffffffff814c086b RFL=00000282 [--S----] 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 =0000 0000000000000000 00000000 00000000 DS =0000 0000000000000000 00000000 00000000 FS =0000 00007ff1fadd5900 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=00007ff1fb38c618 CR3=000000000e1b8000 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=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