syzkaller login: [ 30.617003] BUG: Bad rss-counter state mm:00000000ba0d8879 type:MM_FILEPAGES val:33 [ 30.618470] BUG: Bad rss-counter state mm:00000000ba0d8879 type:MM_ANONPAGES val:22 [ 30.768754] ================================================================== [ 30.769831] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 30.770991] Read of size 8 at addr ffff88800fd0b6b0 by task sshd/220 [ 30.772088] [ 30.772347] CPU: 1 PID: 220 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 30.773369] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 30.774606] Call Trace: [ 30.774926] [ 30.775208] dump_stack_lvl+0x91/0xf0 [ 30.775694] print_report+0xcc/0x620 [ 30.776186] ? __virt_addr_valid+0x102/0x340 [ 30.776747] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.777369] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.777984] kasan_report+0xbe/0xf0 [ 30.778492] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.779115] vma_interval_tree_remove+0xc75/0xec0 [ 30.779714] vma_prepare+0xc54/0x11a0 [ 30.780194] __split_vma+0x5af/0x950 [ 30.780677] ? __pfx___split_vma+0x10/0x10 [ 30.781206] ? find_held_lock+0x2c/0x110 [ 30.781725] do_vmi_align_munmap+0x2ba/0x11f0 [ 30.782296] ? lock_is_held_type+0x9f/0x120 [ 30.782892] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 30.783501] ? mtree_range_walk+0x632/0x900 [ 30.784054] ? mas_walk+0x5c7/0x7c0 [ 30.784528] do_vmi_munmap+0x1f1/0x2b0 [ 30.785025] mmap_region+0x1f9/0x2660 [ 30.785508] ? vm_mmap_pgoff+0x15c/0x3a0 [ 30.786031] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 30.786781] ? __pfx_lock_acquire+0x10/0x10 [ 30.787319] ? __pfx_mmap_region+0x10/0x10 [ 30.787862] ? security_mmap_addr+0x7d/0xa0 [ 30.788393] ? get_unmapped_area+0x1f5/0x3f0 [ 30.788949] do_mmap+0x854/0xf00 [ 30.789389] vm_mmap_pgoff+0x1a6/0x3a0 [ 30.789886] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 30.790491] ksys_mmap_pgoff+0x3af/0x500 [ 30.791020] do_syscall_64+0x3f/0x90 [ 30.791502] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.792176] RIP: 0033:0x7f0fd4cd7d82 [ 30.792629] 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 [ 30.794794] RSP: 002b:00007ffd8e086038 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 30.795703] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f0fd4cd7d82 [ 30.796573] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f0fd4111000 [ 30.797417] RBP: 00007f0fd4111000 R08: 0000000000000009 R09: 0000000000001000 [ 30.798267] R10: 0000000000000812 R11: 0000000000000206 R12: 000055e74158aec0 [ 30.799155] R13: 00007ffd8e086050 R14: 00007ffd8e086080 R15: 00007ffd8e0863e0 [ 30.800031] [ 30.800321] [ 30.800536] Allocated by task 213: [ 30.800974] kasan_save_stack+0x22/0x50 [ 30.801484] kasan_set_track+0x25/0x30 [ 30.801985] __kasan_slab_alloc+0x59/0x70 [ 30.802559] kmem_cache_alloc+0x16b/0x370 [ 30.803086] vm_area_dup+0x20/0x160 [ 30.803549] __split_vma+0x170/0x950 [ 30.804021] split_vma+0xc6/0x110 [ 30.804462] mprotect_fixup+0x8d2/0xb30 [ 30.804969] do_mprotect_pkey+0x87e/0xd40 [ 30.805487] __x64_sys_mprotect+0x78/0xc0 [ 30.806010] do_syscall_64+0x3f/0x90 [ 30.806522] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.807173] [ 30.807393] Freed by task 213: [ 30.807797] kasan_save_stack+0x22/0x50 [ 30.808309] kasan_set_track+0x25/0x30 [ 30.808807] kasan_save_free_info+0x2b/0x50 [ 30.809340] __kasan_slab_free+0x10a/0x190 [ 30.809875] kmem_cache_free+0x10d/0x4d0 [ 30.810401] rcu_core+0x8c8/0x2860 [ 30.810851] __do_softirq+0x1b7/0x7d4 [ 30.811330] [ 30.811547] Last potentially related work creation: [ 30.812141] kasan_save_stack+0x22/0x50 [ 30.812741] __kasan_record_aux_stack+0x8e/0xa0 [ 30.813323] __call_rcu_common.constprop.0+0x6a/0xb90 [ 30.813977] remove_vma+0x139/0x170 [ 30.814461] do_vmi_align_munmap+0xd4a/0x11f0 [ 30.815031] do_vmi_munmap+0x1f1/0x2b0 [ 30.815518] __vm_munmap+0x138/0x3a0 [ 30.815988] __x64_sys_munmap+0x59/0x80 [ 30.816487] do_syscall_64+0x3f/0x90 [ 30.816962] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.817622] [ 30.817837] The buggy address belongs to the object at ffff88800fd0b658 [ 30.817837] which belongs to the cache vm_area_struct of size 168 [ 30.819336] The buggy address is located 88 bytes inside of [ 30.819336] freed 168-byte region [ffff88800fd0b658, ffff88800fd0b700) [ 30.820764] [ 30.820981] The buggy address belongs to the physical page: [ 30.821647] page:0000000067159961 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xfd0b [ 30.822790] memcg:ffff888015ef1901 [ 30.823219] flags: 0x100000000000200(slab|node=0|zone=1) [ 30.823872] page_type: 0xffffffff() [ 30.824336] raw: 0100000000000200 ffff8880087a0c80 dead000000000122 0000000000000000 [ 30.825265] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff888015ef1901 [ 30.826171] page dumped because: kasan: bad access detected [ 30.826868] [ 30.827084] Memory state around the buggy address: [ 30.827674] ffff88800fd0b580: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 30.828537] ffff88800fd0b600: 00 00 00 fc fc fc fc fc fc fc fc fa fb fb fb fb [ 30.829402] >ffff88800fd0b680: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 30.830253] ^ [ 30.830870] ffff88800fd0b700: fc fc fc fc fc fc fc fc fa fb fb fb fb fb fb fb [ 30.831733] ffff88800fd0b780: fb fb fb fb fb fb fb fb fb fb fb fb fb fc fc fc [ 30.832588] ================================================================== [ 30.833526] Disabling lock debugging due to kernel taint [ 32.906992] BUG: Bad rss-counter state mm:00000000d8db2bd6 type:MM_FILEPAGES val:33 [ 32.908134] BUG: Bad rss-counter state mm:00000000d8db2bd6 type:MM_ANONPAGES val:22 [ 33.316191] BUG: Bad rss-counter state mm:00000000724d7c40 type:MM_FILEPAGES val:33 [ 33.317277] BUG: Bad rss-counter state mm:00000000724d7c40 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:52075' (ECDSA) to the list of known hosts. 2023/06/20 23:02:29 fuzzer started 2023/06/20 23:02:30 dialing manager at localhost:36067 2023/06/20 23:02:30 checking machine... 2023/06/20 23:02:30 checking revisions... [ 34.092633] kmemleak: Automatic memory scanning thread ended 2023/06/20 23:02:30 testing simple program... [ 34.143507] cgroup: Unknown subsys name 'net' [ 34.183301] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 23:02:29 Registers: info registers vcpu 0 RAX=dffffc0000000000 RBX=ffff888013022770 RCX=0000000000001788 RDX=1ffff110026044ee RSI=ffffffff81f4c2e4 RDI=ffff888009085948 RBP=0000000000000000 RSP=ffff88801a017a50 R8 =0000000000000005 R9 =0000000000000000 R10=0000000000000200 R11=0000000000000000 R12=00000000000001ff R13=0000000000000006 R14=00000000000002f1 R15=dffffc0000000000 RIP=ffffffff81f4c3dc 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 00007f0fbd3c4900 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=00007f0fbd97b618 CR3=000000000d852000 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=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 info registers vcpu 1 RAX=ffff88806cf35000 RBX=0000000000000001 RCX=ffffffff8451250e RDX=ffffed100d9e6a01 RSI=0000000000000004 RDI=ffffffff81288ac5 RBP=dffffc0000000000 RSP=ffff888008e07e70 R8 =0000000000000000 R9 =ffffed100d9e6a00 R10=ffff88806cf35003 R11=ffff888008c04400 R12=ffffffff85d3d350 R13=1ffff110011c0fd3 R14=0000000000000000 R15=0000000000000000 RIP=ffffffff8451349f RFL=00000246 [---Z-P-] CPL=0 II=0 A20=1 SMM=0 HLT=1 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=00007f5a3a911000 CR3=000000000c524000 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=a9f0eadf612e3db4344cbb98abbc729d XMM02=000000000011a728eff9b2d0a8fce9cb XMM03=000000000011a7f82c67c8bc2e329bc3 XMM04=b212db90f94ba34900000000000ae988 XMM05=19e9129bd510f2350000000000131aa0 XMM06=23367c041c898ad30000000000130908 XMM07=e042d86d42eb936e0000000000121eb8 XMM08=e5a5fd20d6387146000000000011a7f8 XMM09=00000000000000000000000000000000 XMM10=20200000000020202020202020200000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000