syzkaller login: [ 38.730001] BUG: Bad rss-counter state mm:00000000d62802e5 type:MM_FILEPAGES val:33 [ 38.731020] BUG: Bad rss-counter state mm:00000000d62802e5 type:MM_ANONPAGES val:22 [ 38.845270] ================================================================== [ 38.845987] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 38.846715] Read of size 8 at addr ffff88800d93d228 by task sshd/219 [ 38.847305] [ 38.847479] CPU: 0 PID: 219 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 38.848140] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 38.848993] Call Trace: [ 38.849244] [ 38.849475] dump_stack_lvl+0x91/0xf0 [ 38.849750] print_report+0xcc/0x620 [ 38.850019] ? __virt_addr_valid+0x102/0x340 [ 38.850319] ? vma_interval_tree_remove+0xc75/0xec0 [ 38.850661] ? vma_interval_tree_remove+0xc75/0xec0 [ 38.851031] kasan_report+0xbe/0xf0 [ 38.851292] ? vma_interval_tree_remove+0xc75/0xec0 [ 38.851629] vma_interval_tree_remove+0xc75/0xec0 [ 38.851958] vma_prepare+0xc54/0x11a0 [ 38.852223] __split_vma+0x5af/0x950 [ 38.852488] ? __pfx___split_vma+0x10/0x10 [ 38.852778] ? find_held_lock+0x2c/0x110 [ 38.853064] do_vmi_align_munmap+0x2ba/0x11f0 [ 38.853387] ? lock_is_held_type+0x9f/0x120 [ 38.853682] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 38.854013] ? mtree_range_walk+0x632/0x900 [ 38.854314] ? mas_walk+0x5c7/0x7c0 [ 38.854585] do_vmi_munmap+0x1f1/0x2b0 [ 38.854886] mmap_region+0x1f9/0x2660 [ 38.855173] ? vm_mmap_pgoff+0x15c/0x3a0 [ 38.855486] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 38.855921] ? __pfx_lock_acquire+0x10/0x10 [ 38.856238] ? __pfx_mmap_region+0x10/0x10 [ 38.856561] ? security_mmap_addr+0x7d/0xa0 [ 38.856883] ? get_unmapped_area+0x1f5/0x3f0 [ 38.857212] do_mmap+0x854/0xf00 [ 38.857482] vm_mmap_pgoff+0x1a6/0x3a0 [ 38.857774] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 38.858110] ksys_mmap_pgoff+0x3af/0x500 [ 38.858417] do_syscall_64+0x3f/0x90 [ 38.858708] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 38.859101] RIP: 0033:0x7f568bba4d82 [ 38.859377] 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 [ 38.860672] RSP: 002b:00007ffee0b2ab28 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 38.861228] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f568bba4d82 [ 38.861763] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f568afde000 [ 38.862270] RBP: 00007f568afde000 R08: 0000000000000009 R09: 0000000000001000 [ 38.862781] R10: 0000000000000812 R11: 0000000000000206 R12: 0000555d43b65ec0 [ 38.863309] R13: 00007ffee0b2ab40 R14: 00007ffee0b2ab70 R15: 00007ffee0b2aed0 [ 38.863819] [ 38.863993] [ 38.864124] Allocated by task 212: [ 38.864383] kasan_save_stack+0x22/0x50 [ 38.864682] kasan_set_track+0x25/0x30 [ 38.864978] __kasan_slab_alloc+0x59/0x70 [ 38.865288] kmem_cache_alloc+0x16b/0x370 [ 38.865595] vm_area_dup+0x20/0x160 [ 38.865873] __split_vma+0x170/0x950 [ 38.866156] split_vma+0xc6/0x110 [ 38.866422] mprotect_fixup+0x8d2/0xb30 [ 38.866723] do_mprotect_pkey+0x87e/0xd40 [ 38.867036] __x64_sys_mprotect+0x78/0xc0 [ 38.867347] do_syscall_64+0x3f/0x90 [ 38.867633] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 38.868023] [ 38.868149] Freed by task 212: [ 38.868386] kasan_save_stack+0x22/0x50 [ 38.868686] kasan_set_track+0x25/0x30 [ 38.868978] kasan_save_free_info+0x2b/0x50 [ 38.869306] __kasan_slab_free+0x10a/0x190 [ 38.869622] kmem_cache_free+0x10d/0x4d0 [ 38.869929] rcu_core+0x8c8/0x2860 [ 38.870189] __do_softirq+0x1b7/0x7d4 [ 38.870481] [ 38.870608] Last potentially related work creation: [ 38.870963] kasan_save_stack+0x22/0x50 [ 38.871267] __kasan_record_aux_stack+0x8e/0xa0 [ 38.871613] __call_rcu_common.constprop.0+0x6a/0xb90 [ 38.872006] remove_vma+0x139/0x170 [ 38.872274] do_vmi_align_munmap+0xd4a/0x11f0 [ 38.872610] do_vmi_munmap+0x1f1/0x2b0 [ 38.872897] __vm_munmap+0x138/0x3a0 [ 38.873176] __x64_sys_munmap+0x59/0x80 [ 38.873483] do_syscall_64+0x3f/0x90 [ 38.873763] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 38.874147] [ 38.874272] Second to last potentially related work creation: [ 38.874682] kasan_save_stack+0x22/0x50 [ 38.874990] __kasan_record_aux_stack+0x8e/0xa0 [ 38.875339] __call_rcu_common.constprop.0+0x6a/0xb90 [ 38.875712] remove_vma+0x139/0x170 [ 38.875987] do_vmi_align_munmap+0xd4a/0x11f0 [ 38.876328] do_vmi_munmap+0x1f1/0x2b0 [ 38.876615] mmap_region+0x1f9/0x2660 [ 38.876898] do_mmap+0x854/0xf00 [ 38.877162] vm_mmap_pgoff+0x1a6/0x3a0 [ 38.877466] ksys_mmap_pgoff+0x3af/0x500 [ 38.877743] do_syscall_64+0x3f/0x90 [ 38.878005] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 38.878353] [ 38.878471] The buggy address belongs to the object at ffff88800d93d1d0 [ 38.878471] which belongs to the cache vm_area_struct of size 168 [ 38.879281] The buggy address is located 88 bytes inside of [ 38.879281] freed 168-byte region [ffff88800d93d1d0, ffff88800d93d278) [ 38.880050] [ 38.880170] The buggy address belongs to the physical page: [ 38.880537] page:00000000efbf9e09 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xd93d [ 38.881135] memcg:ffff88800cb8b401 [ 38.881388] flags: 0x100000000000200(slab|node=0|zone=1) [ 38.881748] page_type: 0xffffffff() [ 38.881990] raw: 0100000000000200 ffff8880087a0c80 ffffea00003a9300 dead000000000006 [ 38.882498] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800cb8b401 [ 38.883000] page dumped because: kasan: bad access detected [ 38.883368] [ 38.883488] Memory state around the buggy address: [ 38.883810] ffff88800d93d100: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 38.884281] ffff88800d93d180: 00 00 fc fc fc fc fc fc fc fc fa fb fb fb fb fb [ 38.884758] >ffff88800d93d200: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fc [ 38.885226] ^ [ 38.885544] ffff88800d93d280: fc fc fc fc fc fc fc 00 00 00 00 00 00 00 00 00 [ 38.886033] ffff88800d93d300: 00 00 00 00 00 00 00 00 00 00 00 00 fc fc fc fc [ 38.886505] ================================================================== [ 38.887056] Disabling lock debugging due to kernel taint [ 41.250425] BUG: Bad rss-counter state mm:000000009b881476 type:MM_FILEPAGES val:33 [ 41.251555] BUG: Bad rss-counter state mm:000000009b881476 type:MM_ANONPAGES val:22 [ 41.724173] BUG: Bad rss-counter state mm:00000000880a2cdd type:MM_FILEPAGES val:33 [ 41.724953] BUG: Bad rss-counter state mm:00000000880a2cdd type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:6125' (ECDSA) to the list of known hosts. 2023/06/21 08:40:42 fuzzer started 2023/06/21 08:40:42 dialing manager at localhost:36067 2023/06/21 08:40:42 checking machine... 2023/06/21 08:40:42 checking revisions... [ 42.293753] kmemleak: Automatic memory scanning thread ended 2023/06/21 08:40:42 testing simple program... [ 42.327282] cgroup: Unknown subsys name 'net' [ 42.368042] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 08:40:42 Registers: info registers vcpu 0 RAX=ffff88806ce35000 RBX=0000000000000000 RCX=ffffffff8451250e RDX=ffffed100d9c6a01 RSI=0000000000000004 RDI=ffffffff81288ac5 RBP=dffffc0000000000 RSP=ffffffff85407e10 R8 =0000000000000000 R9 =ffffed100d9c6a00 R10=ffff88806ce35003 R11=ffff888008c04000 R12=ffffffff85d3d350 R13=1ffffffff0a80fc7 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 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=00007ffe58994a78 CR3=0000000005482000 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=00007f42f5cd65100000563d94ecf790 XMM02=6f6974707972636e6561737268746977 XMM03=00000000000000000000000000777074 XMM04=40404040404040404040404040404040 XMM05=5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a XMM06=20202020202020202020202020202020 XMM07=ffffffffffff00ffffff00ffffff00ff XMM08=00002000000000202020002020200000 XMM09=ffffffffffff00ffffff00ffffff00ff XMM10=00002000000000202020002020200000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=fffffffffba0e674 RBX=ffffffff85dfe018 RCX=ffffffff8180c6a1 RDX=0000000000000000 RSI=ffffffff86138e62 RDI=ffffffff85dfe000 RBP=ffffffff85dfe000 RSP=ffff888016e979e8 R8 =ffffffff86138e62 R9 =ffff888016e97ae0 R10=0000000000038001 R11=0000000000020d8f R12=ffffffff85dfe034 R13=ffffffff85dfe000 R14=ffffffff85dfe000 R15=dffffc0000000000 RIP=ffffffff8112fc93 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 00007fd398709900 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=00007fff6cdeb000 CR3=000000001693e000 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=000000000000000000ffff0000000000 XMM02=2f00646f6874656d5f74707972636e65 XMM03=5320444f4854454d5f54505952434e45 XMM04=40404040404040404040404040404040 XMM05=5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a XMM06=20202020202020202020202020202020 XMM07=ff00ffffffffffffffffffffffffffff XMM08=20002020202020200020202020202020 XMM09=0000ffffffffffffffffffffffffffff XMM10=00002020202020200020202020202020 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000