syzkaller login: [ 32.148342] BUG: Bad rss-counter state mm:0000000064cd4c43 type:MM_FILEPAGES val:33 [ 32.149322] BUG: Bad rss-counter state mm:0000000064cd4c43 type:MM_ANONPAGES val:22 [ 32.333462] ================================================================== [ 32.334469] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 32.335604] Read of size 8 at addr ffff88800f028058 by task sshd/220 [ 32.336480] [ 32.336719] CPU: 0 PID: 220 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 32.337666] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 32.338713] Call Trace: [ 32.339057] [ 32.339364] dump_stack_lvl+0x91/0xf0 [ 32.339897] print_report+0xcc/0x620 [ 32.340452] ? __virt_addr_valid+0x102/0x340 [ 32.341053] ? vma_interval_tree_remove+0xc75/0xec0 [ 32.341722] ? vma_interval_tree_remove+0xc75/0xec0 [ 32.342390] kasan_report+0xbe/0xf0 [ 32.342910] ? vma_interval_tree_remove+0xc75/0xec0 [ 32.343599] vma_interval_tree_remove+0xc75/0xec0 [ 32.344266] vma_prepare+0xc54/0x11a0 [ 32.344794] __split_vma+0x5af/0x950 [ 32.345311] ? __pfx___split_vma+0x10/0x10 [ 32.345883] ? find_held_lock+0x2c/0x110 [ 32.346454] do_vmi_align_munmap+0x2ba/0x11f0 [ 32.347070] ? lock_is_held_type+0x9f/0x120 [ 32.347657] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 32.348329] ? mtree_range_walk+0x632/0x900 [ 32.348924] ? mas_walk+0x5c7/0x7c0 [ 32.349440] do_vmi_munmap+0x1f1/0x2b0 [ 32.349978] mmap_region+0x1f9/0x2660 [ 32.350501] ? vm_mmap_pgoff+0x15c/0x3a0 [ 32.351067] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 32.351848] ? __pfx_lock_acquire+0x10/0x10 [ 32.352446] ? __pfx_mmap_region+0x10/0x10 [ 32.353019] ? security_mmap_addr+0x7d/0xa0 [ 32.353590] ? get_unmapped_area+0x1f5/0x3f0 [ 32.354190] do_mmap+0x854/0xf00 [ 32.354673] vm_mmap_pgoff+0x1a6/0x3a0 [ 32.355205] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 32.355808] ksys_mmap_pgoff+0x3af/0x500 [ 32.356361] do_syscall_64+0x3f/0x90 [ 32.356874] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 32.357571] RIP: 0033:0x7fba5eb7bd82 [ 32.358063] 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 [ 32.360389] RSP: 002b:00007ffdf95d47d8 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 32.361367] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007fba5eb7bd82 [ 32.362284] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007fba5dfb5000 [ 32.363193] RBP: 00007fba5dfb5000 R08: 0000000000000009 R09: 0000000000001000 [ 32.364109] R10: 0000000000000812 R11: 0000000000000206 R12: 0000564949ab1b20 [ 32.365013] R13: 00007ffdf95d47f0 R14: 00007ffdf95d4820 R15: 00007ffdf95d4b80 [ 32.365924] [ 32.366232] [ 32.366464] Allocated by task 213: [ 32.366918] kasan_save_stack+0x22/0x50 [ 32.367460] kasan_set_track+0x25/0x30 [ 32.367984] __kasan_slab_alloc+0x59/0x70 [ 32.368556] kmem_cache_alloc+0x16b/0x370 [ 32.369114] vm_area_dup+0x20/0x160 [ 32.369596] __split_vma+0x170/0x950 [ 32.370090] split_vma+0xc6/0x110 [ 32.370557] mprotect_fixup+0x8d2/0xb30 [ 32.371096] do_mprotect_pkey+0x87e/0xd40 [ 32.371654] __x64_sys_mprotect+0x78/0xc0 [ 32.372232] do_syscall_64+0x3f/0x90 [ 32.372735] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 32.373418] [ 32.373653] Freed by task 19: [ 32.374068] kasan_save_stack+0x22/0x50 [ 32.374604] kasan_set_track+0x25/0x30 [ 32.375136] kasan_save_free_info+0x2b/0x50 [ 32.375698] __kasan_slab_free+0x10a/0x190 [ 32.376274] kmem_cache_free+0x10d/0x4d0 [ 32.376821] rcu_core+0x8c8/0x2860 [ 32.377300] __do_softirq+0x1b7/0x7d4 [ 32.377814] [ 32.378049] Last potentially related work creation: [ 32.378677] kasan_save_stack+0x22/0x50 [ 32.379218] __kasan_record_aux_stack+0x8e/0xa0 [ 32.379834] __call_rcu_common.constprop.0+0x6a/0xb90 [ 32.380537] remove_vma+0x139/0x170 [ 32.381022] do_vmi_align_munmap+0xd4a/0x11f0 [ 32.381622] do_vmi_munmap+0x1f1/0x2b0 [ 32.382137] __vm_munmap+0x138/0x3a0 [ 32.382633] __x64_sys_munmap+0x59/0x80 [ 32.383159] do_syscall_64+0x3f/0x90 [ 32.383663] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 32.384347] [ 32.384574] The buggy address belongs to the object at ffff88800f028000 [ 32.384574] which belongs to the cache vm_area_struct of size 168 [ 32.386109] The buggy address is located 88 bytes inside of [ 32.386109] freed 168-byte region [ffff88800f028000, ffff88800f0280a8) [ 32.387584] [ 32.387813] The buggy address belongs to the physical page: [ 32.388518] page:00000000fce8b8d9 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xf028 [ 32.389661] memcg:ffff88800e08c201 [ 32.390112] flags: 0x100000000000200(slab|node=0|zone=1) [ 32.390792] page_type: 0xffffffff() [ 32.391267] raw: 0100000000000200 ffff88800879fc80 ffffea00003c0ac0 dead000000000004 [ 32.392243] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800e08c201 [ 32.393201] page dumped because: kasan: bad access detected [ 32.393896] [ 32.394124] Memory state around the buggy address: [ 32.394733] ffff88800f027f00: ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff [ 32.395640] ffff88800f027f80: ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff [ 32.396543] >ffff88800f028000: fa fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 32.397442] ^ [ 32.398212] ffff88800f028080: fb fb fb fb fb fc fc fc fc fc fc fc fc 00 00 00 [ 32.399104] ffff88800f028100: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 32.400002] ================================================================== [ 32.401102] Disabling lock debugging due to kernel taint [ 34.425242] BUG: Bad rss-counter state mm:0000000051d017c8 type:MM_FILEPAGES val:33 [ 34.426403] BUG: Bad rss-counter state mm:0000000051d017c8 type:MM_ANONPAGES val:22 [ 34.965828] BUG: Bad rss-counter state mm:0000000064596392 type:MM_FILEPAGES val:33 [ 34.966998] BUG: Bad rss-counter state mm:0000000064596392 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:57393' (ECDSA) to the list of known hosts. 2023/06/20 08:00:51 fuzzer started 2023/06/20 08:00:51 dialing manager at localhost:44161 2023/06/20 08:00:51 checking machine... 2023/06/20 08:00:51 checking revisions... [ 35.620439] kmemleak: Automatic memory scanning thread ended 2023/06/20 08:00:51 testing simple program... [ 35.670096] cgroup: Unknown subsys name 'net' [ 35.713203] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 08:00:49 Registers: info registers vcpu 0 RAX=ffff88806ce35000 RBX=0000000000000000 RCX=ffffffff8450c50e RDX=ffffed100d9c6a01 RSI=0000000000000004 RDI=ffffffff812889a5 RBP=dffffc0000000000 RSP=ffffffff85407e10 R8 =0000000000000000 R9 =ffffed100d9c6a00 R10=ffff88806ce35003 R11=ffff888008c58000 R12=ffffffff85d3bed0 R13=1ffffffff0a80fc7 R14=0000000000000000 R15=0000000000000000 RIP=ffffffff8450d49f 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 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=00007f2d878fbb90 CR3=000000000f6be000 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=47c1f1cf2df881973a465972d2ee9b63 XMM02=ec2efd57dc4c00df000000000011e030 XMM03=2e184df333d023a1000000000011e100 XMM04=207a23dd9ec2c20a00000000000ae988 XMM05=dfa957e3a3996e000000000000134c48 XMM06=4fda316b135da52b0000000000133978 XMM07=e042d86d42eb936e0000000000124258 XMM08=2e184df333d023a1000000000011e100 XMM09=00000000000000000000000000000000 XMM10=20200000000020202020202020200000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=0000000000000000 RBX=ffff88801c5b74d8 RCX=0000000000000001 RDX=1ffff110038b6e9c RSI=ffffffff816cb48b RDI=ffff88801c5b74e0 RBP=0000000000000000 RSP=ffff88801c5b73f0 R8 =0000000000000001 R9 =ffff88801c5b7450 R10=0000000000038001 R11=0000000000020cf8 R12=ffff88801c5b74d8 R13=0000000000000000 R14=ffff88800f189b40 R15=ffff8880144dc4c0 RIP=ffffffff813ad46e 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 00007fc9597a0900 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=00007fc959d57618 CR3=000000000edfa000 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