syzkaller login: [ 38.887159] BUG: Bad rss-counter state mm:0000000048a2c5b3 type:MM_FILEPAGES val:33 [ 38.888404] BUG: Bad rss-counter state mm:0000000048a2c5b3 type:MM_ANONPAGES val:22 [ 38.924266] ================================================================== [ 38.925344] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 38.926475] Read of size 8 at addr ffff88800eaeaed8 by task sshd/219 [ 38.927432] [ 38.927699] CPU: 1 PID: 219 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 38.928674] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 38.929832] Call Trace: [ 38.930180] [ 38.930532] dump_stack_lvl+0x91/0xf0 [ 38.931138] print_report+0xcc/0x620 [ 38.931715] ? __virt_addr_valid+0x102/0x340 [ 38.932361] ? vma_interval_tree_remove+0xc75/0xec0 [ 38.933025] ? vma_interval_tree_remove+0xc75/0xec0 [ 38.933743] kasan_report+0xbe/0xf0 [ 38.934229] ? vma_interval_tree_remove+0xc75/0xec0 [ 38.934868] vma_interval_tree_remove+0xc75/0xec0 [ 38.935556] vma_prepare+0xc54/0x11a0 [ 38.936097] __split_vma+0x5af/0x950 [ 38.936647] ? __pfx___split_vma+0x10/0x10 [ 38.937275] ? find_held_lock+0x2c/0x110 [ 38.937880] do_vmi_align_munmap+0x2ba/0x11f0 [ 38.938533] ? lock_is_held_type+0x9f/0x120 [ 38.939164] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 38.939867] ? mtree_range_walk+0x632/0x900 [ 38.940509] ? mas_walk+0x5c7/0x7c0 [ 38.941053] do_vmi_munmap+0x1f1/0x2b0 [ 38.941607] mmap_region+0x1f9/0x2660 [ 38.942150] ? vm_mmap_pgoff+0x15c/0x3a0 [ 38.942764] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 38.943562] ? __pfx_lock_acquire+0x10/0x10 [ 38.944152] ? __pfx_mmap_region+0x10/0x10 [ 38.944747] ? security_mmap_addr+0x7d/0xa0 [ 38.945359] ? get_unmapped_area+0x1f5/0x3f0 [ 38.945978] do_mmap+0x854/0xf00 [ 38.946468] vm_mmap_pgoff+0x1a6/0x3a0 [ 38.947021] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 38.947652] ksys_mmap_pgoff+0x3af/0x500 [ 38.948213] do_syscall_64+0x3f/0x90 [ 38.948749] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 38.949482] RIP: 0033:0x7f2717115d82 [ 38.949997] 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 [ 38.952404] RSP: 002b:00007ffca58a5e18 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 38.953462] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f2717115d82 [ 38.954431] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f271654f000 [ 38.955407] RBP: 00007f271654f000 R08: 0000000000000009 R09: 0000000000001000 [ 38.956386] R10: 0000000000000812 R11: 0000000000000206 R12: 000055baf5bdef70 [ 38.957374] R13: 00007ffca58a5e30 R14: 00007ffca58a5e60 R15: 00007ffca58a61c0 [ 38.958369] [ 38.958706] [ 38.958949] Allocated by task 212: [ 38.959440] kasan_save_stack+0x22/0x50 [ 38.960019] kasan_set_track+0x25/0x30 [ 38.960594] __kasan_slab_alloc+0x59/0x70 [ 38.961200] kmem_cache_alloc+0x16b/0x370 [ 38.961795] vm_area_dup+0x20/0x160 [ 38.962312] __split_vma+0x170/0x950 [ 38.962846] split_vma+0xc6/0x110 [ 38.963348] mprotect_fixup+0x8d2/0xb30 [ 38.963926] do_mprotect_pkey+0x87e/0xd40 [ 38.964524] __x64_sys_mprotect+0x78/0xc0 [ 38.965156] do_syscall_64+0x3f/0x90 [ 38.965703] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 38.966476] [ 38.966739] Freed by task 203: [ 38.967204] kasan_save_stack+0x22/0x50 [ 38.967802] kasan_set_track+0x25/0x30 [ 38.968466] kasan_save_free_info+0x2b/0x50 [ 38.969128] __kasan_slab_free+0x10a/0x190 [ 38.969783] kmem_cache_free+0x10d/0x4d0 [ 38.970410] rcu_core+0x8c8/0x2860 [ 38.970953] __do_softirq+0x1b7/0x7d4 [ 38.971522] [ 38.971779] Last potentially related work creation: [ 38.972462] kasan_save_stack+0x22/0x50 [ 38.973078] __kasan_record_aux_stack+0x8e/0xa0 [ 38.973768] __call_rcu_common.constprop.0+0x6a/0xb90 [ 38.974544] remove_vma+0x139/0x170 [ 38.975088] do_vmi_align_munmap+0xd4a/0x11f0 [ 38.975758] do_vmi_munmap+0x1f1/0x2b0 [ 38.976345] __vm_munmap+0x138/0x3a0 [ 38.976918] __x64_sys_munmap+0x59/0x80 [ 38.977520] do_syscall_64+0x3f/0x90 [ 38.978090] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 38.978866] [ 38.979108] Second to last potentially related work creation: [ 38.979798] kasan_save_stack+0x22/0x50 [ 38.980327] __kasan_record_aux_stack+0x8e/0xa0 [ 38.980945] __call_rcu_common.constprop.0+0x6a/0xb90 [ 38.981615] remove_vma+0x139/0x170 [ 38.982088] do_vmi_align_munmap+0xd4a/0x11f0 [ 38.982677] do_vmi_munmap+0x1f1/0x2b0 [ 38.983186] mmap_region+0x1f9/0x2660 [ 38.983667] do_mmap+0x854/0xf00 [ 38.984102] vm_mmap_pgoff+0x1a6/0x3a0 [ 38.984590] ksys_mmap_pgoff+0x7d/0x500 [ 38.985135] do_syscall_64+0x3f/0x90 [ 38.985614] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 38.986256] [ 38.986471] The buggy address belongs to the object at ffff88800eaeae80 [ 38.986471] which belongs to the cache vm_area_struct of size 168 [ 38.988004] The buggy address is located 88 bytes inside of [ 38.988004] freed 168-byte region [ffff88800eaeae80, ffff88800eaeaf28) [ 38.989454] [ 38.989677] The buggy address belongs to the physical page: [ 38.990349] page:00000000446c19d6 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xeaea [ 38.991473] memcg:ffff88800db0ad01 [ 38.991917] flags: 0x100000000000200(slab|node=0|zone=1) [ 38.992592] page_type: 0xffffffff() [ 38.993090] raw: 0100000000000200 ffff8880087a0c80 ffffea0000365a00 dead000000000008 [ 38.994037] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800db0ad01 [ 38.994983] page dumped because: kasan: bad access detected [ 38.995680] [ 38.995898] Memory state around the buggy address: [ 38.996484] ffff88800eaead80: fc fc fc 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 38.997376] ffff88800eaeae00: 00 00 00 00 00 00 00 00 fc fc fc fc fc fc fc fc [ 38.998249] >ffff88800eaeae80: fa fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 38.999135] ^ [ 38.999890] ffff88800eaeaf00: fb fb fb fb fb fc fc fc fc fc fc fc fc fc fc fc [ 39.000709] ffff88800eaeaf80: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc [ 39.001525] ================================================================== [ 39.002565] Disabling lock debugging due to kernel taint [ 41.157569] BUG: Bad rss-counter state mm:000000002661dac2 type:MM_FILEPAGES val:33 [ 41.158572] BUG: Bad rss-counter state mm:000000002661dac2 type:MM_ANONPAGES val:22 [ 41.654509] BUG: Bad rss-counter state mm:000000009823d613 type:MM_FILEPAGES val:33 [ 41.655737] BUG: Bad rss-counter state mm:000000009823d613 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:56282' (ECDSA) to the list of known hosts. 2023/06/20 18:08:31 fuzzer started 2023/06/20 18:08:31 dialing manager at localhost:36067 2023/06/20 18:08:31 checking machine... 2023/06/20 18:08:31 checking revisions... [ 42.325336] kmemleak: Automatic memory scanning thread ended 2023/06/20 18:08:31 testing simple program... [ 42.377757] cgroup: Unknown subsys name 'net' [ 42.416916] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 18:08:31 Registers: info registers vcpu 0 RAX=ffffffff860d825b RBX=0000000000000001 RCX=ffffffff860d8256 RDX=0000000000000000 RSI=0000000000000003 RDI=ffffffff85dbd7f8 RBP=ffff888017d27ad8 RSP=ffff888017d27a10 R8 =ffffffff860d8256 R9 =ffff888017d27ac0 R10=0000000000038001 R11=0000000000010b8d R12=ffff888017d27ae0 R13=ffff888017d27ac8 R14=ffff888017d27ac1 R15=ffff888017d27a80 RIP=ffffffff81130a6e 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 00007f53dda78900 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=00007f53de02f618 CR3=000000000fd10000 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=00007f2a36500010 CR3=000000000d3ae000 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=4c92f9db5002e19a98453ee96d211825 XMM02=2c67c8bc2e329bc3000000000011b488 XMM03=fb795ef6d65770560000000000121e48 XMM04=73dcaf5c750b01d000000000000ae988 XMM05=31f71a64a0e9ad120000000000133e98 XMM06=4fda316b135da52b0000000000132bc8 XMM07=e042d86d42eb936e0000000000122120 XMM08=92fc21843aae2e64000000000011b4e8 XMM09=00000000000000000000000000000000 XMM10=20200000000020202020202020200000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000