syzkaller login: [ 30.263118] BUG: Bad rss-counter state mm:00000000f93d0fad type:MM_FILEPAGES val:33 [ 30.264278] BUG: Bad rss-counter state mm:00000000f93d0fad type:MM_ANONPAGES val:22 [ 30.298379] ================================================================== [ 30.299364] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 30.300390] Read of size 8 at addr ffff88800ebafb38 by task sshd/220 [ 30.301239] [ 30.301504] CPU: 1 PID: 220 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 30.302354] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 30.303335] Call Trace: [ 30.303644] [ 30.303922] dump_stack_lvl+0x91/0xf0 [ 30.304468] print_report+0xcc/0x620 [ 30.305024] ? __virt_addr_valid+0x102/0x340 [ 30.305670] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.306334] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.307024] kasan_report+0xbe/0xf0 [ 30.307537] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.308221] vma_interval_tree_remove+0xc75/0xec0 [ 30.308817] vma_prepare+0xc54/0x11a0 [ 30.309308] __split_vma+0x5af/0x950 [ 30.309775] ? __pfx___split_vma+0x10/0x10 [ 30.310293] ? find_held_lock+0x2c/0x110 [ 30.310928] do_vmi_align_munmap+0x2ba/0x11f0 [ 30.311507] ? lock_is_held_type+0x9f/0x120 [ 30.312065] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 30.312677] ? mtree_range_walk+0x632/0x900 [ 30.313238] ? mas_walk+0x5c7/0x7c0 [ 30.313722] do_vmi_munmap+0x1f1/0x2b0 [ 30.314209] mmap_region+0x1f9/0x2660 [ 30.314706] ? vm_mmap_pgoff+0x15c/0x3a0 [ 30.315227] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 30.315947] ? __pfx_lock_acquire+0x10/0x10 [ 30.316477] ? __pfx_mmap_region+0x10/0x10 [ 30.317041] ? security_mmap_addr+0x7d/0xa0 [ 30.317581] ? get_unmapped_area+0x1f5/0x3f0 [ 30.318134] do_mmap+0x854/0xf00 [ 30.318573] vm_mmap_pgoff+0x1a6/0x3a0 [ 30.319067] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 30.319622] ksys_mmap_pgoff+0x3af/0x500 [ 30.320130] do_syscall_64+0x3f/0x90 [ 30.320608] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.321268] RIP: 0033:0x7f47890e3d82 [ 30.321720] 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 [ 30.323865] RSP: 002b:00007ffc9eb2dd08 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 30.324773] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f47890e3d82 [ 30.325647] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f478851d000 [ 30.326473] RBP: 00007f478851d000 R08: 0000000000000009 R09: 0000000000001000 [ 30.327508] R10: 0000000000000812 R11: 0000000000000206 R12: 00005647ba0faec0 [ 30.328340] R13: 00007ffc9eb2dd20 R14: 00007ffc9eb2dd50 R15: 00007ffc9eb2e0b0 [ 30.329201] [ 30.329503] [ 30.329714] Allocated by task 213: [ 30.330140] kasan_save_stack+0x22/0x50 [ 30.330652] kasan_set_track+0x25/0x30 [ 30.331244] __kasan_slab_alloc+0x59/0x70 [ 30.331883] kmem_cache_alloc+0x16b/0x370 [ 30.332511] vm_area_dup+0x20/0x160 [ 30.333083] __split_vma+0x170/0x950 [ 30.333644] split_vma+0xc6/0x110 [ 30.334179] mprotect_fixup+0x8d2/0xb30 [ 30.334781] do_mprotect_pkey+0x87e/0xd40 [ 30.335411] __x64_sys_mprotect+0x78/0xc0 [ 30.336036] do_syscall_64+0x3f/0x90 [ 30.336605] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.337384] [ 30.337646] Freed by task 213: [ 30.338117] kasan_save_stack+0x22/0x50 [ 30.338725] kasan_set_track+0x25/0x30 [ 30.339315] kasan_save_free_info+0x2b/0x50 [ 30.339951] __kasan_slab_free+0x10a/0x190 [ 30.340589] kmem_cache_free+0x10d/0x4d0 [ 30.341236] rcu_core+0x8c8/0x2860 [ 30.341768] __do_softirq+0x1b7/0x7d4 [ 30.342337] [ 30.342591] Last potentially related work creation: [ 30.343299] kasan_save_stack+0x22/0x50 [ 30.343898] __kasan_record_aux_stack+0x8e/0xa0 [ 30.344588] __call_rcu_common.constprop.0+0x6a/0xb90 [ 30.345373] remove_vma+0x139/0x170 [ 30.345916] do_vmi_align_munmap+0xd4a/0x11f0 [ 30.346581] do_vmi_munmap+0x1f1/0x2b0 [ 30.347171] __vm_munmap+0x138/0x3a0 [ 30.347745] __x64_sys_munmap+0x59/0x80 [ 30.348340] do_syscall_64+0x3f/0x90 [ 30.348935] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.349702] [ 30.349962] The buggy address belongs to the object at ffff88800ebafae0 [ 30.349962] which belongs to the cache vm_area_struct of size 168 [ 30.351812] The buggy address is located 88 bytes inside of [ 30.351812] freed 168-byte region [ffff88800ebafae0, ffff88800ebafb88) [ 30.353583] [ 30.353841] The buggy address belongs to the physical page: [ 30.354693] page:00000000b25d55a3 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xebaf [ 30.356075] memcg:ffff88800b952d01 [ 30.356590] flags: 0x100000000000200(slab|node=0|zone=1) [ 30.357438] page_type: 0xffffffff() [ 30.358001] raw: 0100000000000200 ffff8880087a0c80 dead000000000122 0000000000000000 [ 30.359182] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800b952d01 [ 30.360323] page dumped because: kasan: bad access detected [ 30.361189] [ 30.361446] Memory state around the buggy address: [ 30.362146] ffff88800ebafa00: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 30.363192] ffff88800ebafa80: 00 00 00 00 fc fc fc fc fc fc fc fc fa fb fb fb [ 30.364206] >ffff88800ebafb00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 30.365542] ^ [ 30.366352] ffff88800ebafb80: fb fc fc fc fc fc fc fc fc fa fb fb fb fb fb fb [ 30.367347] ffff88800ebafc00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fc fc [ 30.368440] ================================================================== [ 30.369612] Disabling lock debugging due to kernel taint [ 32.261800] BUG: Bad rss-counter state mm:000000000247028d type:MM_FILEPAGES val:33 [ 32.262781] BUG: Bad rss-counter state mm:000000000247028d type:MM_ANONPAGES val:22 [ 32.718820] BUG: Bad rss-counter state mm:0000000094775559 type:MM_FILEPAGES val:33 [ 32.719749] BUG: Bad rss-counter state mm:0000000094775559 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:58102' (ECDSA) to the list of known hosts. 2023/06/21 01:05:13 fuzzer started 2023/06/21 01:05:13 dialing manager at localhost:36067 2023/06/21 01:05:13 checking machine... 2023/06/21 01:05:13 checking revisions... [ 33.459667] kmemleak: Automatic memory scanning thread ended 2023/06/21 01:05:13 testing simple program... [ 33.509311] cgroup: Unknown subsys name 'net' [ 33.557512] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 01:05:13 Registers: info registers vcpu 0 RAX=ffffffff83641d20 RBX=0000000000000000 RCX=1ffffffff0ba7c92 RDX=ffffffffffffffff RSI=0000000000000000 RDI=ffff888016fbff58 RBP=ffff888016fbff48 RSP=ffff888016fbff38 R8 =0000000000000000 R9 =0000000000000000 R10=ffffffff85d3d357 R11=0000000000000000 R12=ffff888016fbff58 R13=0000000000000000 R14=0000000000000000 R15=0000000000000000 RIP=ffffffff83641d24 RFL=00000202 [-------] 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 00007fc321f5f900 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=00007fc322516618 CR3=000000001025c000 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=0000000000000001 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=00007f2a51023240 CR3=000000000c92c000 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=7d85294686cc8c985544434d5e7006b3 XMM02=ec2efd57dc4c00df0000000000120420 XMM03=02d0fb3ca3a0017800000000001204f0 XMM04=5481b80e8b560f7300000000000ae988 XMM05=19e9129bd510f23500000000001332b8 XMM06=20ee65ccc18ee9520000000000132120 XMM07=e042d86d42eb936e0000000000123ed0 XMM08=02d0fb3ca3a0017800000000001204f0 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000