syzkaller login: [ 30.662296] BUG: Bad rss-counter state mm:000000001f4dc9df type:MM_FILEPAGES val:33 [ 30.663519] BUG: Bad rss-counter state mm:000000001f4dc9df type:MM_ANONPAGES val:22 [ 30.707045] ================================================================== [ 30.708001] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 30.708943] Read of size 8 at addr ffff88800f3376b0 by task sshd/220 [ 30.709714] [ 30.709931] CPU: 1 PID: 220 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 30.710792] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 30.711792] Call Trace: [ 30.712115] [ 30.712397] dump_stack_lvl+0x91/0xf0 [ 30.712892] print_report+0xcc/0x620 [ 30.713385] ? __virt_addr_valid+0x102/0x340 [ 30.713938] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.714558] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.715184] kasan_report+0xbe/0xf0 [ 30.715660] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.716293] vma_interval_tree_remove+0xc75/0xec0 [ 30.716897] vma_prepare+0xc54/0x11a0 [ 30.717385] __split_vma+0x5af/0x950 [ 30.717860] ? __pfx___split_vma+0x10/0x10 [ 30.718404] ? find_held_lock+0x2c/0x110 [ 30.718929] do_vmi_align_munmap+0x2ba/0x11f0 [ 30.719517] ? lock_is_held_type+0x9f/0x120 [ 30.720074] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 30.720691] ? mtree_range_walk+0x632/0x900 [ 30.721259] ? mas_walk+0x5c7/0x7c0 [ 30.721744] do_vmi_munmap+0x1f1/0x2b0 [ 30.722248] mmap_region+0x1f9/0x2660 [ 30.722740] ? vm_mmap_pgoff+0x15c/0x3a0 [ 30.723273] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 30.723989] ? __pfx_lock_acquire+0x10/0x10 [ 30.724528] ? __pfx_mmap_region+0x10/0x10 [ 30.725065] ? security_mmap_addr+0x7d/0xa0 [ 30.725604] ? get_unmapped_area+0x1f5/0x3f0 [ 30.726161] do_mmap+0x854/0xf00 [ 30.726601] vm_mmap_pgoff+0x1a6/0x3a0 [ 30.727103] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 30.727701] ksys_mmap_pgoff+0x3af/0x500 [ 30.728220] do_syscall_64+0x3f/0x90 [ 30.728714] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.729373] RIP: 0033:0x7f410d894d82 [ 30.729834] 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 [ 30.732006] RSP: 002b:00007ffeed054368 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 30.732920] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f410d894d82 [ 30.733770] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f410ccce000 [ 30.734635] RBP: 00007f410ccce000 R08: 0000000000000009 R09: 0000000000001000 [ 30.735507] R10: 0000000000000812 R11: 0000000000000206 R12: 000055b19a571f70 [ 30.736370] R13: 00007ffeed054380 R14: 00007ffeed0543b0 R15: 00007ffeed054710 [ 30.737242] [ 30.737535] [ 30.737751] Allocated by task 213: [ 30.738190] kasan_save_stack+0x22/0x50 [ 30.738701] kasan_set_track+0x25/0x30 [ 30.739222] __kasan_slab_alloc+0x59/0x70 [ 30.739749] kmem_cache_alloc+0x16b/0x370 [ 30.740267] vm_area_dup+0x20/0x160 [ 30.740728] __split_vma+0x170/0x950 [ 30.741200] split_vma+0xc6/0x110 [ 30.741638] mprotect_fixup+0x8d2/0xb30 [ 30.742148] do_mprotect_pkey+0x87e/0xd40 [ 30.742676] __x64_sys_mprotect+0x78/0xc0 [ 30.743215] do_syscall_64+0x3f/0x90 [ 30.743699] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.744345] [ 30.744560] Freed by task 213: [ 30.744965] kasan_save_stack+0x22/0x50 [ 30.745467] kasan_set_track+0x25/0x30 [ 30.745963] kasan_save_free_info+0x2b/0x50 [ 30.746498] __kasan_slab_free+0x10a/0x190 [ 30.747040] kmem_cache_free+0x10d/0x4d0 [ 30.747572] rcu_core+0x8c8/0x2860 [ 30.748018] __do_softirq+0x1b7/0x7d4 [ 30.748501] [ 30.748715] Last potentially related work creation: [ 30.749297] kasan_save_stack+0x22/0x50 [ 30.749804] __kasan_record_aux_stack+0x8e/0xa0 [ 30.750374] __call_rcu_common.constprop.0+0x6a/0xb90 [ 30.751018] remove_vma+0x139/0x170 [ 30.751493] do_vmi_align_munmap+0xd4a/0x11f0 [ 30.752053] do_vmi_munmap+0x1f1/0x2b0 [ 30.752537] __vm_munmap+0x138/0x3a0 [ 30.753011] __x64_sys_munmap+0x59/0x80 [ 30.753506] do_syscall_64+0x3f/0x90 [ 30.753979] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.754645] [ 30.754859] The buggy address belongs to the object at ffff88800f337658 [ 30.754859] which belongs to the cache vm_area_struct of size 168 [ 30.756351] The buggy address is located 88 bytes inside of [ 30.756351] freed 168-byte region [ffff88800f337658, ffff88800f337700) [ 30.757771] [ 30.757986] The buggy address belongs to the physical page: [ 30.758649] page:000000008978bd9b refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xf337 [ 30.759746] memcg:ffff88800fcf1301 [ 30.760182] flags: 0x100000000000200(slab|node=0|zone=1) [ 30.760841] page_type: 0xffffffff() [ 30.761297] raw: 0100000000000200 ffff8880087a0c80 dead000000000122 0000000000000000 [ 30.762225] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800fcf1301 [ 30.763151] page dumped because: kasan: bad access detected [ 30.763826] [ 30.764039] Memory state around the buggy address: [ 30.764636] ffff88800f337580: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 30.765496] ffff88800f337600: 00 00 00 fc fc fc fc fc fc fc fc fa fb fb fb fb [ 30.766356] >ffff88800f337680: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 30.767228] ^ [ 30.767809] ffff88800f337700: fc fc fc fc fc fc fc fc fa fb fb fb fb fb fb fb [ 30.768679] ffff88800f337780: fb fb fb fb fb fb fb fb fb fb fb fb fb fc fc fc [ 30.769533] ================================================================== [ 30.770681] Disabling lock debugging due to kernel taint [ 32.766445] BUG: Bad rss-counter state mm:00000000c8620ed5 type:MM_FILEPAGES val:33 [ 32.767434] BUG: Bad rss-counter state mm:00000000c8620ed5 type:MM_ANONPAGES val:22 [ 33.244919] BUG: Bad rss-counter state mm:0000000015448933 type:MM_FILEPAGES val:33 [ 33.246001] BUG: Bad rss-counter state mm:0000000015448933 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:9905' (ECDSA) to the list of known hosts. 2023/06/21 08:53:02 fuzzer started 2023/06/21 08:53:02 dialing manager at localhost:36067 2023/06/21 08:53:02 checking machine... 2023/06/21 08:53:02 checking revisions... [ 33.986334] kmemleak: Automatic memory scanning thread ended 2023/06/21 08:53:02 testing simple program... [ 34.034131] cgroup: Unknown subsys name 'net' [ 34.073077] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 08:53:02 Registers: info registers vcpu 0 RAX=0000000000000007 RBX=0000000000000002 RCX=ffffffff8180f5ba RDX=00000000000080f5 RSI=00000000000080f5 RDI=ffffffff86509dc4 RBP=ffff88806ce09af0 RSP=ffff88806ce09a28 R8 =0000000000000000 R9 =ffff88806ce09ad8 R10=0000000000038001 R11=0000000000020d9c R12=ffff88806ce09af8 R13=ffff88806ce09ae0 R14=ffff88806ce09ad9 R15=ffff88806ce09a98 RIP=ffffffff8113078b 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 00007f717b198900 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=00007f717b74f618 CR3=0000000016f54000 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=00007f18878c4d90 CR3=000000000ed74000 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=107cb4a1a019fb890e47b209ef1c754e XMM02=000000000011b340ec2efd57dc4c00df XMM03=0000000000122528e93cfd239ea2ae65 XMM04=5f4b77375591fc9d00000000000ae988 XMM05=4fae8070ba63c0fd0000000000133140 XMM06=4fda316b135da52b00000000001321e0 XMM07=e042d86d42eb936e00000000001227a8 XMM08=e93cfd239ea2ae65000000000011b3a0 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000