syzkaller login: [ 31.010712] BUG: Bad rss-counter state mm:0000000069e93b1e type:MM_FILEPAGES val:33 [ 31.011439] BUG: Bad rss-counter state mm:0000000069e93b1e type:MM_ANONPAGES val:22 [ 31.043439] ================================================================== [ 31.044049] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 31.044667] Read of size 8 at addr ffff88800e85aa50 by task sshd/220 [ 31.045144] [ 31.045283] CPU: 1 PID: 220 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 31.045837] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 31.046437] Call Trace: [ 31.046634] [ 31.046809] dump_stack_lvl+0x91/0xf0 [ 31.047145] print_report+0xcc/0x620 [ 31.047491] ? __virt_addr_valid+0x102/0x340 [ 31.048207] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.048629] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.049043] kasan_report+0xbe/0xf0 [ 31.049343] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.049773] vma_interval_tree_remove+0xc75/0xec0 [ 31.050145] vma_prepare+0xc54/0x11a0 [ 31.050456] __split_vma+0x5af/0x950 [ 31.050744] ? __pfx___split_vma+0x10/0x10 [ 31.051074] ? find_held_lock+0x2c/0x110 [ 31.051408] do_vmi_align_munmap+0x2ba/0x11f0 [ 31.051767] ? lock_is_held_type+0x9f/0x120 [ 31.052110] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 31.052493] ? mtree_range_walk+0x632/0x900 [ 31.052844] ? mas_walk+0x5c7/0x7c0 [ 31.053145] do_vmi_munmap+0x1f1/0x2b0 [ 31.053472] mmap_region+0x1f9/0x2660 [ 31.053849] ? vm_mmap_pgoff+0x15c/0x3a0 [ 31.054185] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 31.054648] ? __pfx_lock_acquire+0x10/0x10 [ 31.054988] ? __pfx_mmap_region+0x10/0x10 [ 31.055325] ? security_mmap_addr+0x7d/0xa0 [ 31.055668] ? get_unmapped_area+0x1f5/0x3f0 [ 31.056021] do_mmap+0x854/0xf00 [ 31.056301] vm_mmap_pgoff+0x1a6/0x3a0 [ 31.056612] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 31.056958] ksys_mmap_pgoff+0x3af/0x500 [ 31.057285] do_syscall_64+0x3f/0x90 [ 31.057607] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.058075] RIP: 0033:0x7f35aba70d82 [ 31.058367] 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 [ 31.059718] RSP: 002b:00007ffce0b1b278 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 31.060282] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f35aba70d82 [ 31.060853] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f35aaeaa000 [ 31.061414] RBP: 00007f35aaeaa000 R08: 0000000000000009 R09: 0000000000001000 [ 31.062018] R10: 0000000000000812 R11: 0000000000000206 R12: 000055f3dca46d90 [ 31.062570] R13: 00007ffce0b1b290 R14: 00007ffce0b1b2c0 R15: 00007ffce0b1b620 [ 31.063139] [ 31.063332] [ 31.063475] Allocated by task 213: [ 31.063754] kasan_save_stack+0x22/0x50 [ 31.064079] kasan_set_track+0x25/0x30 [ 31.064401] __kasan_slab_alloc+0x59/0x70 [ 31.064720] kmem_cache_alloc+0x16b/0x370 [ 31.065041] vm_area_dup+0x20/0x160 [ 31.065323] __split_vma+0x170/0x950 [ 31.065646] split_vma+0xc6/0x110 [ 31.065997] mprotect_fixup+0x8d2/0xb30 [ 31.066349] do_mprotect_pkey+0x87e/0xd40 [ 31.066710] __x64_sys_mprotect+0x78/0xc0 [ 31.067063] do_syscall_64+0x3f/0x90 [ 31.067390] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.067799] [ 31.067934] Freed by task 213: [ 31.068176] kasan_save_stack+0x22/0x50 [ 31.068490] kasan_set_track+0x25/0x30 [ 31.068877] kasan_save_free_info+0x2b/0x50 [ 31.069210] __kasan_slab_free+0x10a/0x190 [ 31.069555] kmem_cache_free+0x10d/0x4d0 [ 31.069949] rcu_core+0x8c8/0x2860 [ 31.070245] __do_softirq+0x1b7/0x7d4 [ 31.070583] [ 31.070721] Last potentially related work creation: [ 31.071111] kasan_save_stack+0x22/0x50 [ 31.071448] __kasan_record_aux_stack+0x8e/0xa0 [ 31.071834] __call_rcu_common.constprop.0+0x6a/0xb90 [ 31.072264] remove_vma+0x139/0x170 [ 31.072570] do_vmi_align_munmap+0xd4a/0x11f0 [ 31.072940] do_vmi_munmap+0x1f1/0x2b0 [ 31.073264] __vm_munmap+0x138/0x3a0 [ 31.073583] __x64_sys_munmap+0x59/0x80 [ 31.073954] do_syscall_64+0x3f/0x90 [ 31.074255] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.074661] [ 31.074803] The buggy address belongs to the object at ffff88800e85a9f8 [ 31.074803] which belongs to the cache vm_area_struct of size 168 [ 31.075776] The buggy address is located 88 bytes inside of [ 31.075776] freed 168-byte region [ffff88800e85a9f8, ffff88800e85aaa0) [ 31.076748] [ 31.076894] The buggy address belongs to the physical page: [ 31.077355] page:00000000eee4a7f1 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xe85a [ 31.078080] memcg:ffff8880159bbd01 [ 31.078341] flags: 0x100000000000200(slab|node=0|zone=1) [ 31.078737] page_type: 0xffffffff() [ 31.079022] raw: 0100000000000200 ffff8880087a0c80 dead000000000122 0000000000000000 [ 31.079626] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff8880159bbd01 [ 31.080217] page dumped because: kasan: bad access detected [ 31.080653] [ 31.080797] Memory state around the buggy address: [ 31.081180] ffff88800e85a900: fc fc 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 31.081818] ffff88800e85a980: 00 00 00 00 00 00 00 fc fc fc fc fc fc fc fc fa [ 31.082381] >ffff88800e85aa00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 31.082936] ^ [ 31.083367] ffff88800e85aa80: fb fb fb fb fc fc fc fc fc fc fc fc fa fb fb fb [ 31.083893] ffff88800e85ab00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 31.084467] ================================================================== [ 31.085144] Disabling lock debugging due to kernel taint [ 32.990830] BUG: Bad rss-counter state mm:000000009d28db68 type:MM_FILEPAGES val:33 [ 32.991518] BUG: Bad rss-counter state mm:000000009d28db68 type:MM_ANONPAGES val:22 [ 33.332813] BUG: Bad rss-counter state mm:000000007bee8d0a type:MM_FILEPAGES val:33 [ 33.333538] BUG: Bad rss-counter state mm:000000007bee8d0a type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:30175' (ECDSA) to the list of known hosts. 2023/06/21 09:30:48 fuzzer started 2023/06/21 09:30:49 dialing manager at localhost:36067 2023/06/21 09:30:49 checking machine... 2023/06/21 09:30:49 checking revisions... [ 33.799794] kmemleak: Automatic memory scanning thread ended 2023/06/21 09:30:49 testing simple program... [ 33.843795] cgroup: Unknown subsys name 'net' [ 33.907566] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 09:30:48 Registers: info registers vcpu 0 RAX=ffff888008da0000 RBX=ffff888008d9fed0 RCX=ffffffff860a1201 RDX=ffff888008d9fed8 RSI=0000000000000000 RDI=ffff888008d9f988 RBP=ffff888008d98000 RSP=ffff888008d9f908 R8 =ffffffff860a12fa R9 =ffff888008d9f9b8 R10=0000000000038001 R11=00000000000078fb R12=ffff888008d9f9d8 R13=ffff888008d9f9c0 R14=ffff888008d9fed0 R15=ffff888008d9f978 RIP=ffffffff81131290 RFL=00000287 [--S--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 0000000000000000 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=00007ffd5fba7318 CR3=0000000019b52000 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=2038343a30333a3930203132206e754a XMM01=657463656e6e6f63736944203a5d3932 XMM02=302e303120746f6f722072657375206d XMM03=203a5d3932325b646873732072656c6c XMM04=69662068637573206f4e203a656c6163 XMM05=3a656c696620766e65206e65706f206f XMM06=65733a6468737328766e655f6d617020 XMM07=6b7a79732038343a30333a3930203132 XMM08=69767265733d7373616c63742030733a XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=ffffea0000367a00 RBX=ffff88800d9e8850 RCX=ffffea0000000000 RDX=ffff88800844f780 RSI=ffffffff813782f8 RDI=ffff88800844f780 RBP=ffff888008e37d38 RSP=ffff888008e37d10 R8 =0000000000000000 R9 =fffffbfff0ba7a6a R10=ffffffff85d3d357 R11=0000000000000128 R12=ffff88800844f780 R13=ffff88808d9e8850 R14=ffffffff813782f8 R15=ffff88800d9e88d0 RIP=ffffffff81809a4f 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 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=00007f4758d49618 CR3=000000000ef3a000 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