syzkaller login: [ 30.537034] BUG: Bad rss-counter state mm:0000000021a7f446 type:MM_FILEPAGES val:33 [ 30.539314] BUG: Bad rss-counter state mm:0000000021a7f446 type:MM_ANONPAGES val:22 [ 30.722032] ================================================================== [ 30.723507] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 30.724867] Read of size 8 at addr ffff88800deba5c8 by task sshd/220 [ 30.725880] [ 30.726144] CPU: 1 PID: 220 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 30.727167] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 30.728391] Call Trace: [ 30.728768] [ 30.729106] dump_stack_lvl+0x91/0xf0 [ 30.729690] print_report+0xcc/0x620 [ 30.730259] ? __virt_addr_valid+0x102/0x340 [ 30.730914] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.731681] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.732412] kasan_report+0xbe/0xf0 [ 30.732967] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.733690] vma_interval_tree_remove+0xc75/0xec0 [ 30.734397] vma_prepare+0xc54/0x11a0 [ 30.734951] __split_vma+0x5af/0x950 [ 30.735512] ? __pfx___split_vma+0x10/0x10 [ 30.736155] ? find_held_lock+0x2c/0x110 [ 30.736767] do_vmi_align_munmap+0x2ba/0x11f0 [ 30.737424] ? lock_is_held_type+0x9f/0x120 [ 30.738046] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 30.738751] ? mtree_range_walk+0x632/0x900 [ 30.739403] ? mas_walk+0x5c7/0x7c0 [ 30.739963] do_vmi_munmap+0x1f1/0x2b0 [ 30.740543] mmap_region+0x1f9/0x2660 [ 30.741104] ? vm_mmap_pgoff+0x15c/0x3a0 [ 30.741718] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 30.742543] ? __pfx_lock_acquire+0x10/0x10 [ 30.743160] ? __pfx_mmap_region+0x10/0x10 [ 30.743777] ? security_mmap_addr+0x7d/0xa0 [ 30.744421] ? get_unmapped_area+0x1f5/0x3f0 [ 30.745097] do_mmap+0x854/0xf00 [ 30.745618] vm_mmap_pgoff+0x1a6/0x3a0 [ 30.746192] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 30.746846] ksys_mmap_pgoff+0x3af/0x500 [ 30.747438] do_syscall_64+0x3f/0x90 [ 30.748001] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.748770] RIP: 0033:0x7efc7bc46d82 [ 30.749308] 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 [ 30.751771] RSP: 002b:00007ffd7c524a08 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 30.752833] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007efc7bc46d82 [ 30.753834] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007efc7b080000 [ 30.754821] RBP: 00007efc7b080000 R08: 0000000000000009 R09: 0000000000001000 [ 30.755812] R10: 0000000000000812 R11: 0000000000000206 R12: 0000561576c20ec0 [ 30.756827] R13: 00007ffd7c524a20 R14: 00007ffd7c524a50 R15: 00007ffd7c524db0 [ 30.757826] [ 30.758165] [ 30.758416] Allocated by task 213: [ 30.758915] kasan_save_stack+0x22/0x50 [ 30.759506] kasan_set_track+0x25/0x30 [ 30.760086] __kasan_slab_alloc+0x59/0x70 [ 30.760691] kmem_cache_alloc+0x16b/0x370 [ 30.761286] vm_area_dup+0x20/0x160 [ 30.761813] __split_vma+0x170/0x950 [ 30.762354] split_vma+0xc6/0x110 [ 30.762867] mprotect_fixup+0x8d2/0xb30 [ 30.763454] do_mprotect_pkey+0x87e/0xd40 [ 30.764157] __x64_sys_mprotect+0x78/0xc0 [ 30.764762] do_syscall_64+0x3f/0x90 [ 30.765305] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.766045] [ 30.766298] Freed by task 213: [ 30.766776] kasan_save_stack+0x22/0x50 [ 30.767374] kasan_set_track+0x25/0x30 [ 30.767939] kasan_save_free_info+0x2b/0x50 [ 30.768613] __kasan_slab_free+0x10a/0x190 [ 30.769242] kmem_cache_free+0x10d/0x4d0 [ 30.769833] rcu_core+0x8c8/0x2860 [ 30.770351] __do_softirq+0x1b7/0x7d4 [ 30.770902] [ 30.771154] Last potentially related work creation: [ 30.771827] kasan_save_stack+0x22/0x50 [ 30.772421] __kasan_record_aux_stack+0x8e/0xa0 [ 30.773080] __call_rcu_common.constprop.0+0x6a/0xb90 [ 30.773824] remove_vma+0x139/0x170 [ 30.774385] do_vmi_align_munmap+0xd4a/0x11f0 [ 30.775051] do_vmi_munmap+0x1f1/0x2b0 [ 30.775609] __vm_munmap+0x138/0x3a0 [ 30.776157] __x64_sys_munmap+0x59/0x80 [ 30.776743] do_syscall_64+0x3f/0x90 [ 30.777314] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.778077] [ 30.778332] Second to last potentially related work creation: [ 30.779150] kasan_save_stack+0x22/0x50 [ 30.779757] __kasan_record_aux_stack+0x8e/0xa0 [ 30.780462] __call_rcu_common.constprop.0+0x6a/0xb90 [ 30.781232] remove_vma+0x139/0x170 [ 30.781768] do_vmi_align_munmap+0xd4a/0x11f0 [ 30.782433] do_vmi_munmap+0x1f1/0x2b0 [ 30.783009] mmap_region+0x1f9/0x2660 [ 30.783586] do_mmap+0x854/0xf00 [ 30.784106] vm_mmap_pgoff+0x1a6/0x3a0 [ 30.784693] ksys_mmap_pgoff+0x3af/0x500 [ 30.785289] do_syscall_64+0x3f/0x90 [ 30.785856] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.786625] [ 30.786881] The buggy address belongs to the object at ffff88800deba570 [ 30.786881] which belongs to the cache vm_area_struct of size 168 [ 30.788674] The buggy address is located 88 bytes inside of [ 30.788674] freed 168-byte region [ffff88800deba570, ffff88800deba618) [ 30.790367] [ 30.790625] The buggy address belongs to the physical page: [ 30.791412] page:000000009f0c8cb4 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xdeba [ 30.792720] memcg:ffff88800d9f1901 [ 30.793240] flags: 0x100000000000200(slab|node=0|zone=1) [ 30.794007] page_type: 0xffffffff() [ 30.794549] raw: 0100000000000200 ffff8880087a0c80 ffffea000037fe80 dead000000000002 [ 30.795644] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800d9f1901 [ 30.796735] page dumped because: kasan: bad access detected [ 30.797531] [ 30.797786] Memory state around the buggy address: [ 30.798481] ffff88800deba480: fc fa fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 30.799494] ffff88800deba500: fb fb fb fb fb fb fc fc fc fc fc fc fc fc fa fb [ 30.800537] >ffff88800deba580: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 30.801563] ^ [ 30.802363] ffff88800deba600: fb fb fb fc fc fc fc fc fc fc fc fa fb fb fb fb [ 30.803396] ffff88800deba680: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 30.804419] ================================================================== [ 30.805619] Disabling lock debugging due to kernel taint [ 33.093578] BUG: Bad rss-counter state mm:0000000017f78add type:MM_FILEPAGES val:33 [ 33.094564] BUG: Bad rss-counter state mm:0000000017f78add type:MM_ANONPAGES val:22 [ 33.654409] BUG: Bad rss-counter state mm:000000000d115ed0 type:MM_FILEPAGES val:33 [ 33.655588] BUG: Bad rss-counter state mm:000000000d115ed0 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:34193' (ECDSA) to the list of known hosts. 2023/06/21 06:44:59 fuzzer started 2023/06/21 06:44:59 dialing manager at localhost:36067 2023/06/21 06:44:59 checking machine... 2023/06/21 06:44:59 checking revisions... [ 34.374591] kmemleak: Automatic memory scanning thread ended 2023/06/21 06:44:59 testing simple program... [ 34.416830] cgroup: Unknown subsys name 'net' [ 34.462847] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 06:44:59 Registers: info registers vcpu 0 RAX=0068c2ca002ad05a RBX=884560c237b105c0 RCX=000000000000014d RDX=00000000000ae958 RSI=0000000000000000 RDI=000055660bf35290 RBP=0000000000000007 RSP=00007ffd9d4910d0 R8 =00007ffd9d491188 R9 =00007ffd9d491180 R10=00007fdbbbc03a34 R11=000000000000ee4a R12=000055660bf36b70 R13=884560c237b105c0 R14=000055660bf35290 R15=000000000000002f RIP=00007fdbbbb9254d RFL=00000206 [-----P-] CPL=3 II=0 A20=1 SMM=0 HLT=0 ES =0000 0000000000000000 00000000 00000000 CS =0033 0000000000000000 ffffffff 00a0fb00 DPL=3 CS64 [-RA] SS =002b 0000000000000000 ffffffff 00c0f300 DPL=3 DS [-WA] DS =0000 0000000000000000 00000000 00000000 FS =0000 00007fdbbb00e900 00000000 00000000 GS =0000 0000000000000000 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=00007fdbba453140 CR3=000000000d7d2000 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=3d3d3d3d3d3d3d3d3d3d3d3d3d3d3d3d XMM01=00000000000000000000000000000000 XMM02=ffffffffffffffffffffffffffffffff XMM03=2f6c616e72756f6a2f676f6c2f6e7572 XMM04=5d13d7836ec81ef100000000000ae988 XMM05=b0d31d98845859530000000000133e78 XMM06=19e9129bd510f2350000000000132fc0 XMM07=00000000000000000000000000000000 XMM08=415453454d49545f454d49544c414552 XMM09=00000000000000000000000000000000 XMM10=20200000000020202020202020200000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=dffffc0000000000 RBX=ffff888016557a40 RCX=0000000000000001 RDX=1ffff11002caaf48 RSI=ffffffff8363b743 RDI=ffff888016557a4c RBP=000000000000000b RSP=ffff888016557958 R8 =0000000000000001 R9 =ffff8880165579b8 R10=0000000000038001 R11=000000000008a95e R12=ffff888016557a40 R13=0000000000000000 R14=ffff888015b23680 R15=0000000000000d40 RIP=ffffffff813ad51f 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 00007f1d29e6a900 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=00007ffc47f97000 CR3=0000000016858000 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=ffffffffffffffffffff000000000000 XMM01=000000000000003635006b6f6c6c756e XMM02=62003d73646e756f7200323135616873 XMM03=5320444f4854454d5f54505952434e45 XMM04=40404040404040404040404040404040 XMM05=5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a XMM06=20202020202020202020202020202020 XMM07=00000000000000000000000000000000 XMM08=00000000000000000000000000202020 XMM09=ff0000ffffffffffff00000000ffffff XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000