syzkaller login: [ 31.289641] BUG: Bad rss-counter state mm:00000000a08c7bde type:MM_FILEPAGES val:33 [ 31.290673] BUG: Bad rss-counter state mm:00000000a08c7bde type:MM_ANONPAGES val:22 [ 31.457972] ================================================================== [ 31.458921] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 31.459886] Read of size 8 at addr ffff88800dc64ed8 by task sshd/222 [ 31.460644] [ 31.460856] CPU: 0 PID: 222 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 31.461854] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 31.462872] Call Trace: [ 31.463235] [ 31.463531] dump_stack_lvl+0x91/0xf0 [ 31.464019] print_report+0xcc/0x620 [ 31.464502] ? __virt_addr_valid+0x102/0x340 [ 31.465065] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.465685] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.466306] kasan_report+0xbe/0xf0 [ 31.466825] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.467479] vma_interval_tree_remove+0xc75/0xec0 [ 31.468089] vma_prepare+0xc54/0x11a0 [ 31.468571] __split_vma+0x5af/0x950 [ 31.469048] ? __pfx___split_vma+0x10/0x10 [ 31.469581] ? find_held_lock+0x2c/0x110 [ 31.470105] do_vmi_align_munmap+0x2ba/0x11f0 [ 31.470709] ? lock_is_held_type+0x9f/0x120 [ 31.471271] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 31.471897] ? mtree_range_walk+0x632/0x900 [ 31.472449] ? mas_walk+0x5c7/0x7c0 [ 31.472936] do_vmi_munmap+0x1f1/0x2b0 [ 31.473432] mmap_region+0x1f9/0x2660 [ 31.473926] ? vm_mmap_pgoff+0x15c/0x3a0 [ 31.474443] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 31.475210] ? __pfx_lock_acquire+0x10/0x10 [ 31.475752] ? __pfx_mmap_region+0x10/0x10 [ 31.476285] ? security_mmap_addr+0x7d/0xa0 [ 31.476815] ? get_unmapped_area+0x1f5/0x3f0 [ 31.477367] do_mmap+0x854/0xf00 [ 31.477811] vm_mmap_pgoff+0x1a6/0x3a0 [ 31.478315] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 31.478925] ksys_mmap_pgoff+0x3af/0x500 [ 31.479462] do_syscall_64+0x3f/0x90 [ 31.479952] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.480605] RIP: 0033:0x7f35ced90d82 [ 31.481065] 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 [ 31.483248] RSP: 002b:00007ffe427a6a98 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 31.484148] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f35ced90d82 [ 31.485000] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f35ce1ca000 [ 31.485849] RBP: 00007f35ce1ca000 R08: 0000000000000009 R09: 0000000000001000 [ 31.486743] R10: 0000000000000812 R11: 0000000000000206 R12: 0000558109a83ec0 [ 31.487604] R13: 00007ffe427a6ab0 R14: 00007ffe427a6ae0 R15: 00007ffe427a6e40 [ 31.488462] [ 31.488759] [ 31.488980] Allocated by task 215: [ 31.489410] kasan_save_stack+0x22/0x50 [ 31.489918] kasan_set_track+0x25/0x30 [ 31.490414] __kasan_slab_alloc+0x59/0x70 [ 31.491017] kmem_cache_alloc+0x16b/0x370 [ 31.491537] vm_area_dup+0x20/0x160 [ 31.491995] __split_vma+0x170/0x950 [ 31.492460] split_vma+0xc6/0x110 [ 31.492927] mprotect_fixup+0x8d2/0xb30 [ 31.493444] do_mprotect_pkey+0x87e/0xd40 [ 31.493964] __x64_sys_mprotect+0x78/0xc0 [ 31.494494] do_syscall_64+0x3f/0x90 [ 31.495024] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.495669] [ 31.495887] Freed by task 215: [ 31.496280] kasan_save_stack+0x22/0x50 [ 31.496791] kasan_set_track+0x25/0x30 [ 31.497287] kasan_save_free_info+0x2b/0x50 [ 31.497821] __kasan_slab_free+0x10a/0x190 [ 31.498358] kmem_cache_free+0x10d/0x4d0 [ 31.498909] rcu_core+0x8c8/0x2860 [ 31.499388] __do_softirq+0x1b7/0x7d4 [ 31.499865] [ 31.500086] Last potentially related work creation: [ 31.500667] kasan_save_stack+0x22/0x50 [ 31.501171] __kasan_record_aux_stack+0x8e/0xa0 [ 31.501748] __call_rcu_common.constprop.0+0x6a/0xb90 [ 31.502403] remove_vma+0x139/0x170 [ 31.502939] do_vmi_align_munmap+0xd4a/0x11f0 [ 31.503656] do_vmi_munmap+0x1f1/0x2b0 [ 31.504165] __vm_munmap+0x138/0x3a0 [ 31.504652] __x64_sys_munmap+0x59/0x80 [ 31.505160] do_syscall_64+0x3f/0x90 [ 31.505679] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.506328] [ 31.506542] The buggy address belongs to the object at ffff88800dc64e80 [ 31.506542] which belongs to the cache vm_area_struct of size 168 [ 31.508052] The buggy address is located 88 bytes inside of [ 31.508052] freed 168-byte region [ffff88800dc64e80, ffff88800dc64f28) [ 31.509455] [ 31.509710] The buggy address belongs to the physical page: [ 31.510374] page:00000000b56957eb refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xdc64 [ 31.511477] memcg:ffff88801990aa01 [ 31.511905] flags: 0x100000000000200(slab|node=0|zone=1) [ 31.512543] page_type: 0xffffffff() [ 31.512993] raw: 0100000000000200 ffff8880087a0c80 dead000000000122 0000000000000000 [ 31.513956] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88801990aa01 [ 31.514862] page dumped because: kasan: bad access detected [ 31.515538] [ 31.515754] Memory state around the buggy address: [ 31.516328] ffff88800dc64d80: fc fc fc 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 31.517183] ffff88800dc64e00: 00 00 00 00 00 00 00 00 fc fc fc fc fc fc fc fc [ 31.518081] >ffff88800dc64e80: fa fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 31.518929] ^ [ 31.519679] ffff88800dc64f00: fb fb fb fb fb fc fc fc fc fc fc fc fc fc fc fc [ 31.520533] ffff88800dc64f80: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc [ 31.521382] ================================================================== [ 31.522405] Disabling lock debugging due to kernel taint [ 33.828765] BUG: Bad rss-counter state mm:00000000f1520023 type:MM_FILEPAGES val:33 [ 33.829964] BUG: Bad rss-counter state mm:00000000f1520023 type:MM_ANONPAGES val:22 [ 34.385368] BUG: Bad rss-counter state mm:0000000081df3c41 type:MM_FILEPAGES val:33 [ 34.386560] BUG: Bad rss-counter state mm:0000000081df3c41 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:1634' (ECDSA) to the list of known hosts. 2023/06/21 00:48:37 fuzzer started 2023/06/21 00:48:37 dialing manager at localhost:36067 2023/06/21 00:48:37 checking machine... 2023/06/21 00:48:37 checking revisions... [ 35.043098] kmemleak: Automatic memory scanning thread ended 2023/06/21 00:48:37 testing simple program... [ 35.093328] cgroup: Unknown subsys name 'net' [ 35.132819] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 00:48:37 Registers: info registers vcpu 0 RAX=dffffc0000000000 RBX=0000000000000001 RCX=0000000000000001 RDX=1ffff110018b9f35 RSI=ffff88800c5cfda0 RDI=ffff88800c5cf9b0 RBP=ffffffff87f97640 RSP=ffff88800c5cf8f0 R8 =0000000000000001 R9 =ffff88800c5cf9a0 R10=0000000000038001 R11=000000000009195a R12=ffff88800c5cf9c0 R13=ffff88800c5cf9a8 R14=ffff88800c5cfda0 R15=ffff88800c5cf960 RIP=ffffffff81131c60 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 00007f6b033a1900 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=00007f6b03958618 CR3=000000000da16000 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=0000000000000000 RBX=1ffff11001c9af49 RCX=0000000000000000 RDX=1ffff110032f408d RSI=ffffffff818ddcdc RDI=ffff88800e8ffd08 RBP=ffff88800e8ffb80 RSP=ffff88800e4d7a30 R8 =0000000000000005 R9 =0000000000000001 R10=0000000000000001 R11=0000000000000000 R12=ffff888019739680 R13=ffff8880197a0468 R14=1ffff11001c9af6a R15=ffff88800e8ffd10 RIP=ffffffff818ddd33 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 00007f5c364e3700 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=00007faf7ca98958 CR3=000000000b980000 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=2037333a38343a3030203132206e754a XMM01=73732878696e755f6d6170203a5d3133 XMM02=65736f6c63206e6f6973736573203a29 XMM03=755f6d6170203a5d3133325b64687373 XMM04=69662068637573206f4e203a656c6163 XMM05=3a656c696620766e65206e65706f206f XMM06=65733a6468737328766e655f6d617020 XMM07=6b7a79732036333a38343a3030203132 XMM08=3d656e696c646d632022656369767265 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000