syzkaller login: [ 30.675348] BUG: Bad rss-counter state mm:0000000087ea1693 type:MM_FILEPAGES val:33 [ 30.676586] BUG: Bad rss-counter state mm:0000000087ea1693 type:MM_ANONPAGES val:22 [ 30.717400] ================================================================== [ 30.718418] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 30.719348] Read of size 8 at addr ffff888019c4d310 by task sshd/221 [ 30.720112] [ 30.720330] CPU: 0 PID: 221 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 30.721184] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 30.722172] Call Trace: [ 30.722485] [ 30.722768] dump_stack_lvl+0x91/0xf0 [ 30.723280] print_report+0xcc/0x620 [ 30.723770] ? __virt_addr_valid+0x102/0x340 [ 30.724323] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.724931] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.725557] kasan_report+0xbe/0xf0 [ 30.726070] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.726686] vma_interval_tree_remove+0xc75/0xec0 [ 30.727279] vma_prepare+0xc54/0x11a0 [ 30.727760] __split_vma+0x5af/0x950 [ 30.728226] ? __pfx___split_vma+0x10/0x10 [ 30.728763] ? find_held_lock+0x2c/0x110 [ 30.729280] do_vmi_align_munmap+0x2ba/0x11f0 [ 30.729838] ? lock_is_held_type+0x9f/0x120 [ 30.730380] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 30.730980] ? mtree_range_walk+0x632/0x900 [ 30.731532] ? mas_walk+0x5c7/0x7c0 [ 30.732011] do_vmi_munmap+0x1f1/0x2b0 [ 30.732495] mmap_region+0x1f9/0x2660 [ 30.732970] ? vm_mmap_pgoff+0x15c/0x3a0 [ 30.733471] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 30.734183] ? __pfx_lock_acquire+0x10/0x10 [ 30.734709] ? __pfx_mmap_region+0x10/0x10 [ 30.735234] ? security_mmap_addr+0x7d/0xa0 [ 30.735753] ? get_unmapped_area+0x1f5/0x3f0 [ 30.736292] do_mmap+0x854/0xf00 [ 30.736729] vm_mmap_pgoff+0x1a6/0x3a0 [ 30.737222] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 30.737781] ksys_mmap_pgoff+0x3af/0x500 [ 30.738302] do_syscall_64+0x3f/0x90 [ 30.738783] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.739424] RIP: 0033:0x7ff0d2e82d82 [ 30.739884] 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 [ 30.741992] RSP: 002b:00007ffeadd81798 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 30.742892] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007ff0d2e82d82 [ 30.743919] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007ff0d22bc000 [ 30.744794] RBP: 00007ff0d22bc000 R08: 0000000000000009 R09: 0000000000001000 [ 30.745645] R10: 0000000000000812 R11: 0000000000000206 R12: 0000556f92ee1f70 [ 30.746527] R13: 00007ffeadd817b0 R14: 00007ffeadd817e0 R15: 00007ffeadd81b40 [ 30.747381] [ 30.747674] [ 30.747894] Allocated by task 214: [ 30.748323] kasan_save_stack+0x22/0x50 [ 30.748830] kasan_set_track+0x25/0x30 [ 30.749320] __kasan_slab_alloc+0x59/0x70 [ 30.749846] kmem_cache_alloc+0x16b/0x370 [ 30.750377] vm_area_dup+0x20/0x160 [ 30.750831] __split_vma+0x170/0x950 [ 30.751298] split_vma+0xc6/0x110 [ 30.751745] mprotect_fixup+0x8d2/0xb30 [ 30.752244] do_mprotect_pkey+0x87e/0xd40 [ 30.752778] __x64_sys_mprotect+0x78/0xc0 [ 30.753301] do_syscall_64+0x3f/0x90 [ 30.753789] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.754440] [ 30.754655] Freed by task 214: [ 30.755061] kasan_save_stack+0x22/0x50 [ 30.755567] kasan_set_track+0x25/0x30 [ 30.756073] kasan_save_free_info+0x2b/0x50 [ 30.756617] __kasan_slab_free+0x10a/0x190 [ 30.757156] kmem_cache_free+0x10d/0x4d0 [ 30.757680] rcu_core+0x8c8/0x2860 [ 30.758148] __do_softirq+0x1b7/0x7d4 [ 30.758631] [ 30.758849] Last potentially related work creation: [ 30.759430] kasan_save_stack+0x22/0x50 [ 30.759936] __kasan_record_aux_stack+0x8e/0xa0 [ 30.760517] __call_rcu_common.constprop.0+0x6a/0xb90 [ 30.761170] remove_vma+0x139/0x170 [ 30.761619] do_vmi_align_munmap+0xd4a/0x11f0 [ 30.762199] do_vmi_munmap+0x1f1/0x2b0 [ 30.762706] __vm_munmap+0x138/0x3a0 [ 30.763190] __x64_sys_munmap+0x59/0x80 [ 30.763688] do_syscall_64+0x3f/0x90 [ 30.764165] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.764799] [ 30.765014] The buggy address belongs to the object at ffff888019c4d2b8 [ 30.765014] which belongs to the cache vm_area_struct of size 168 [ 30.766482] The buggy address is located 88 bytes inside of [ 30.766482] freed 168-byte region [ffff888019c4d2b8, ffff888019c4d360) [ 30.767874] [ 30.768089] The buggy address belongs to the physical page: [ 30.768740] page:00000000c31ef8ba refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x19c4d [ 30.769820] memcg:ffff88800d946501 [ 30.770258] flags: 0x100000000000200(slab|node=0|zone=1) [ 30.770902] page_type: 0xffffffff() [ 30.771351] raw: 0100000000000200 ffff8880087a0c80 dead000000000122 0000000000000000 [ 30.772265] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800d946501 [ 30.773159] page dumped because: kasan: bad access detected [ 30.773810] [ 30.774038] Memory state around the buggy address: [ 30.774627] ffff888019c4d200: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 fc [ 30.775476] ffff888019c4d280: fc fc fc fc fc fc fc fa fb fb fb fb fb fb fb fb [ 30.776325] >ffff888019c4d300: fb fb fb fb fb fb fb fb fb fb fb fb fc fc fc fc [ 30.777175] ^ [ 30.777634] ffff888019c4d380: fc fc fc fc fa fb fb fb fb fb fb fb fb fb fb fb [ 30.778501] ffff888019c4d400: fb fb fb fb fb fb fb fb fb fc fc fc fc fc fc fc [ 30.779347] ================================================================== [ 30.780392] Disabling lock debugging due to kernel taint [ 32.765858] BUG: Bad rss-counter state mm:00000000ef80d855 type:MM_FILEPAGES val:33 [ 32.767090] BUG: Bad rss-counter state mm:00000000ef80d855 type:MM_ANONPAGES val:22 [ 33.227057] BUG: Bad rss-counter state mm:00000000ca0089db type:MM_FILEPAGES val:33 [ 33.228039] BUG: Bad rss-counter state mm:00000000ca0089db type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:41268' (ECDSA) to the list of known hosts. 2023/06/21 10:35:08 fuzzer started 2023/06/21 10:35:09 dialing manager at localhost:36067 2023/06/21 10:35:09 checking machine... 2023/06/21 10:35:09 checking revisions... [ 33.939773] kmemleak: Automatic memory scanning thread ended 2023/06/21 10:35:09 testing simple program... [ 34.001694] cgroup: Unknown subsys name 'net' [ 34.084215] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 10:35:08 Registers: info registers vcpu 0 RAX=1ffff110028e7efd RBX=0000000000000001 RCX=0000000000000000 RDX=0000000000000001 RSI=0000000000000000 RDI=ffffffff854eea28 RBP=dffffc0000000000 RSP=ffff88801473f7d0 R8 =0000000000000004 R9 =0000000000000000 R10=00000000fffffffe R11=0000000000000001 R12=0000000000000000 R13=0000000000000000 R14=ffff88801473fb80 R15=ffffffff854eea28 RIP=ffffffff8148310c RFL=00000212 [----A--] 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 00007f454ddaa900 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=00007f454d1985d0 CR3=000000000d87a000 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=756f6a2f646d65747379732f6e75722f XMM01=00676f6c7379732f6c616e72756f6a2f XMM02=756f6a2f646d65747379732f6e75722f XMM03=006c616e72756f6a2f646d6574737973 XMM04=9312c3cbe8eb3c2900000000000ae988 XMM05=ec388adb47d5f3780000000000132920 XMM06=c291bd5c70af25b90000000000131710 XMM07=fb795ef6d657705600000000001219c0 XMM08=4f5453444600273d67736d000d0a0920 XMM09=00000000000000000000000000000000 XMM10=20200000000020202020202020200000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=0000000000000001 RBX=0000000000000001 RCX=ffffffff812d86ea RDX=fffffbfff0ba7a6b RSI=0000000000000008 RDI=ffffffff85d3d350 RBP=1ffff11002069f07 RSP=ffff88801034f828 R8 =0000000000000000 R9 =fffffbfff0ba7a6a R10=ffffffff85d3d357 R11=00000000000b6a61 R12=ffffffff8560b640 R13=ffffffff814c8575 R14=ffffffff85652d08 R15=0000000000000001 RIP=ffffffff812d86f2 RFL=00000247 [---Z-PC] 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 00007f24f4612900 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=00007ffca3ec7000 CR3=0000000019cb8000 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=74696d7265705f6d61703d73726f746e XMM02=000000000000000000000000000000ff XMM03=5320444f4854454d5f54505952434e45 XMM04=40404040404040404040404040404040 XMM05=5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a XMM06=20202020202020202020202020202020 XMM07=00000000000000000000000000000000 XMM08=61662029286e65706f5f746964756100 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000