syzkaller login: [ 31.541487] sshd (212) used greatest stack depth: 24128 bytes left [ 31.543730] BUG: Bad rss-counter state mm:000000000ac7f3ef type:MM_FILEPAGES val:33 [ 31.545014] BUG: Bad rss-counter state mm:000000000ac7f3ef type:MM_ANONPAGES val:22 [ 31.702422] ================================================================== [ 31.703542] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 31.704697] Read of size 8 at addr ffff888016a63a50 by task sshd/219 [ 31.705810] [ 31.706055] CPU: 1 PID: 219 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 31.706967] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 31.708019] Call Trace: [ 31.708357] [ 31.708657] dump_stack_lvl+0x91/0xf0 [ 31.709183] print_report+0xcc/0x620 [ 31.709692] ? __virt_addr_valid+0x102/0x340 [ 31.710280] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.710983] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.711637] kasan_report+0xbe/0xf0 [ 31.712129] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.712770] vma_interval_tree_remove+0xc75/0xec0 [ 31.713387] vma_prepare+0xc54/0x11a0 [ 31.713883] __split_vma+0x5af/0x950 [ 31.714371] ? __pfx___split_vma+0x10/0x10 [ 31.714948] ? find_held_lock+0x2c/0x110 [ 31.715484] do_vmi_align_munmap+0x2ba/0x11f0 [ 31.716080] ? lock_is_held_type+0x9f/0x120 [ 31.716634] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 31.717302] ? mtree_range_walk+0x632/0x900 [ 31.717892] ? mas_walk+0x5c7/0x7c0 [ 31.718380] do_vmi_munmap+0x1f1/0x2b0 [ 31.718909] mmap_region+0x1f9/0x2660 [ 31.719414] ? vm_mmap_pgoff+0x15c/0x3a0 [ 31.719945] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 31.720672] ? __pfx_lock_acquire+0x10/0x10 [ 31.721226] ? __pfx_mmap_region+0x10/0x10 [ 31.721769] ? security_mmap_addr+0x7d/0xa0 [ 31.722354] ? get_unmapped_area+0x1f5/0x3f0 [ 31.722936] do_mmap+0x854/0xf00 [ 31.723385] vm_mmap_pgoff+0x1a6/0x3a0 [ 31.723890] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 31.724464] ksys_mmap_pgoff+0x3af/0x500 [ 31.724983] do_syscall_64+0x3f/0x90 [ 31.725482] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.726149] RIP: 0033:0x7f444e3b3d82 [ 31.726646] 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 [ 31.728858] RSP: 002b:00007fff6d136298 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 31.729791] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f444e3b3d82 [ 31.730666] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f444d7ed000 [ 31.731583] RBP: 00007f444d7ed000 R08: 0000000000000009 R09: 0000000000001000 [ 31.732485] R10: 0000000000000812 R11: 0000000000000206 R12: 00005624fa430ec0 [ 31.733358] R13: 00007fff6d1362b0 R14: 00007fff6d1362e0 R15: 00007fff6d136640 [ 31.734239] [ 31.734544] [ 31.734796] Allocated by task 212: [ 31.735237] kasan_save_stack+0x22/0x50 [ 31.735753] kasan_set_track+0x25/0x30 [ 31.736267] __kasan_slab_alloc+0x59/0x70 [ 31.736805] kmem_cache_alloc+0x16b/0x370 [ 31.737376] vm_area_dup+0x20/0x160 [ 31.737863] __split_vma+0x170/0x950 [ 31.738353] split_vma+0xc6/0x110 [ 31.738834] mprotect_fixup+0x8d2/0xb30 [ 31.739361] do_mprotect_pkey+0x87e/0xd40 [ 31.739916] __x64_sys_mprotect+0x78/0xc0 [ 31.740474] do_syscall_64+0x3f/0x90 [ 31.740974] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.741662] [ 31.741899] Freed by task 212: [ 31.742318] kasan_save_stack+0x22/0x50 [ 31.742890] kasan_set_track+0x25/0x30 [ 31.743409] kasan_save_free_info+0x2b/0x50 [ 31.743974] __kasan_slab_free+0x10a/0x190 [ 31.744535] kmem_cache_free+0x10d/0x4d0 [ 31.745056] rcu_core+0x8c8/0x2860 [ 31.745510] __do_softirq+0x1b7/0x7d4 [ 31.746003] [ 31.746224] Last potentially related work creation: [ 31.746883] kasan_save_stack+0x22/0x50 [ 31.747408] __kasan_record_aux_stack+0x8e/0xa0 [ 31.748011] __call_rcu_common.constprop.0+0x6a/0xb90 [ 31.748707] remove_vma+0x139/0x170 [ 31.749176] do_vmi_align_munmap+0xd4a/0x11f0 [ 31.749748] do_vmi_munmap+0x1f1/0x2b0 [ 31.750247] __vm_munmap+0x138/0x3a0 [ 31.750733] __x64_sys_munmap+0x59/0x80 [ 31.751242] do_syscall_64+0x3f/0x90 [ 31.751725] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.752391] [ 31.752619] The buggy address belongs to the object at ffff888016a639f8 [ 31.752619] which belongs to the cache vm_area_struct of size 168 [ 31.754159] The buggy address is located 88 bytes inside of [ 31.754159] freed 168-byte region [ffff888016a639f8, ffff888016a63aa0) [ 31.755619] [ 31.755839] The buggy address belongs to the physical page: [ 31.756524] page:000000005e60fc2c refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x16a63 [ 31.757663] memcg:ffff88800dd14e01 [ 31.758128] flags: 0x100000000000200(slab|node=0|zone=1) [ 31.758797] page_type: 0xffffffff() [ 31.759264] raw: 0100000000000200 ffff8880087a0c80 dead000000000100 dead000000000122 [ 31.760208] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800dd14e01 [ 31.761139] page dumped because: kasan: bad access detected [ 31.761820] [ 31.762040] Memory state around the buggy address: [ 31.762637] ffff888016a63900: fc fc fa fb fb fb fb fb fb fb fb fb fb fb fb fb [ 31.763581] ffff888016a63980: fb fb fb fb fb fb fb fc fc fc fc fc fc fc fc fa [ 31.764485] >ffff888016a63a00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 31.765376] ^ [ 31.766112] ffff888016a63a80: fb fb fb fb fc fc fc fc fc fc fc fc 00 00 00 00 [ 31.767017] ffff888016a63b00: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 31.767874] ================================================================== [ 31.768836] Disabling lock debugging due to kernel taint [ 33.879225] BUG: Bad rss-counter state mm:00000000dab42c06 type:MM_FILEPAGES val:33 [ 33.880397] BUG: Bad rss-counter state mm:00000000dab42c06 type:MM_ANONPAGES val:22 [ 34.284149] BUG: Bad rss-counter state mm:000000009d0a5097 type:MM_FILEPAGES val:33 [ 34.285274] BUG: Bad rss-counter state mm:000000009d0a5097 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:24803' (ECDSA) to the list of known hosts. 2023/06/20 11:58:16 fuzzer started 2023/06/20 11:58:17 dialing manager at localhost:36067 2023/06/20 11:58:17 checking machine... 2023/06/20 11:58:17 checking revisions... [ 34.975935] kmemleak: Automatic memory scanning thread ended 2023/06/20 11:58:17 testing simple program... [ 35.020679] cgroup: Unknown subsys name 'net' [ 35.086436] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 11:58:16 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=00007f67f06a3860 CR3=000000000cce6000 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=f7d6eb099d7fc18b584fd86d05b8e84c XMM02=000000000011da58ec2efd57dc4c00df XMM03=00000000001221201ebd5a8554aba84b XMM04=88c9d34c046bbaf400000000000ae988 XMM05=19e9129bd510f23500000000001321b8 XMM06=4fda316b135da52b0000000000132040 XMM07=e042d86d42eb936e00000000001223a0 XMM08=1ebd5a8554aba84b000000000011dab8 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=0000000000000003 RBX=0000000000000287 RCX=1ffffffff0ba7c92 RDX=0000000000000000 RSI=0000000000000008 RDI=ffffffff84535ffc RBP=ffffffff856d84a0 RSP=ffff88800fbb7990 R8 =0000000000000000 R9 =0000000000000000 R10=ffffffff85d3d357 R11=0000000000120000 R12=0000000000000287 R13=ffff888016a01e88 R14=ffffffff81803033 R15=ffff88800c616e58 RIP=ffffffff84536004 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 00007f7ef5ede900 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=00007ffe08889000 CR3=000000000b9ca000 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=6720646572637465733a4d41503d706f XMM01=652022746f6f72223d74636361207469 XMM02=3d6c616e696d72657420322e322e302e XMM03=3d656d616e74736f682022646873732f XMM04=40404040404040404040404040404040 XMM05=5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a XMM06=20202020202020202020202020202020 XMM07=00000000000000000000000000000000 XMM08=652075253d64692073253d706f000000 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000