syzkaller login: [ 44.489517] BUG: Bad rss-counter state mm:000000000bad4175 type:MM_FILEPAGES val:33 [ 44.491003] BUG: Bad rss-counter state mm:000000000bad4175 type:MM_ANONPAGES val:22 [ 44.654360] ================================================================== [ 44.655308] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 44.656281] Read of size 8 at addr ffff88800c602b38 by task sshd/219 [ 44.657075] [ 44.657370] CPU: 0 PID: 219 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 44.658275] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 44.659313] Call Trace: [ 44.659664] [ 44.659960] dump_stack_lvl+0x91/0xf0 [ 44.660468] print_report+0xcc/0x620 [ 44.660971] ? __virt_addr_valid+0x102/0x340 [ 44.661547] ? vma_interval_tree_remove+0xc75/0xec0 [ 44.662197] ? vma_interval_tree_remove+0xc75/0xec0 [ 44.662833] kasan_report+0xbe/0xf0 [ 44.663337] ? vma_interval_tree_remove+0xc75/0xec0 [ 44.663979] vma_interval_tree_remove+0xc75/0xec0 [ 44.664605] vma_prepare+0xc54/0x11a0 [ 44.665101] __split_vma+0x5af/0x950 [ 44.665593] ? __pfx___split_vma+0x10/0x10 [ 44.666139] ? find_held_lock+0x2c/0x110 [ 44.666689] do_vmi_align_munmap+0x2ba/0x11f0 [ 44.667289] ? lock_is_held_type+0x9f/0x120 [ 44.667847] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 44.668473] ? mtree_range_walk+0x632/0x900 [ 44.669042] ? mas_walk+0x5c7/0x7c0 [ 44.669539] do_vmi_munmap+0x1f1/0x2b0 [ 44.670050] mmap_region+0x1f9/0x2660 [ 44.670545] ? vm_mmap_pgoff+0x15c/0x3a0 [ 44.671072] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 44.671840] ? __pfx_lock_acquire+0x10/0x10 [ 44.672391] ? __pfx_mmap_region+0x10/0x10 [ 44.672951] ? security_mmap_addr+0x7d/0xa0 [ 44.673503] ? get_unmapped_area+0x1f5/0x3f0 [ 44.674081] do_mmap+0x854/0xf00 [ 44.674538] vm_mmap_pgoff+0x1a6/0x3a0 [ 44.675049] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 44.675650] ksys_mmap_pgoff+0x3af/0x500 [ 44.676187] do_syscall_64+0x3f/0x90 [ 44.676681] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 44.677354] RIP: 0033:0x7f9d78f9fd82 [ 44.677827] 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 [ 44.680050] RSP: 002b:00007ffff0ba1ec8 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 44.680990] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f9d78f9fd82 [ 44.681857] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f9d783d9000 [ 44.682740] RBP: 00007f9d783d9000 R08: 0000000000000009 R09: 0000000000001000 [ 44.683644] R10: 0000000000000812 R11: 0000000000000206 R12: 000055e149c9ff70 [ 44.684520] R13: 00007ffff0ba1ee0 R14: 00007ffff0ba1f10 R15: 00007ffff0ba2270 [ 44.685399] [ 44.685700] [ 44.685920] Allocated by task 212: [ 44.686371] kasan_save_stack+0x22/0x50 [ 44.686900] kasan_set_track+0x25/0x30 [ 44.687420] __kasan_slab_alloc+0x59/0x70 [ 44.687958] kmem_cache_alloc+0x16b/0x370 [ 44.688492] vm_area_dup+0x20/0x160 [ 44.688966] __split_vma+0x170/0x950 [ 44.689450] split_vma+0xc6/0x110 [ 44.689901] mprotect_fixup+0x8d2/0xb30 [ 44.690419] do_mprotect_pkey+0x87e/0xd40 [ 44.690953] __x64_sys_mprotect+0x78/0xc0 [ 44.691510] do_syscall_64+0x3f/0x90 [ 44.692000] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 44.692673] [ 44.692891] Freed by task 203: [ 44.693291] kasan_save_stack+0x22/0x50 [ 44.693809] kasan_set_track+0x25/0x30 [ 44.694324] kasan_save_free_info+0x2b/0x50 [ 44.694876] __kasan_slab_free+0x10a/0x190 [ 44.695440] kmem_cache_free+0x10d/0x4d0 [ 44.695967] rcu_core+0x8c8/0x2860 [ 44.696428] __do_softirq+0x1b7/0x7d4 [ 44.696916] [ 44.697134] Last potentially related work creation: [ 44.697749] kasan_save_stack+0x22/0x50 [ 44.698273] __kasan_record_aux_stack+0x8e/0xa0 [ 44.698854] __call_rcu_common.constprop.0+0x6a/0xb90 [ 44.699523] remove_vma+0x139/0x170 [ 44.699971] do_vmi_align_munmap+0xd4a/0x11f0 [ 44.700527] do_vmi_munmap+0x1f1/0x2b0 [ 44.701012] __vm_munmap+0x138/0x3a0 [ 44.701484] __x64_sys_munmap+0x59/0x80 [ 44.701988] do_syscall_64+0x3f/0x90 [ 44.702462] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 44.703098] [ 44.703326] Second to last potentially related work creation: [ 44.704002] kasan_save_stack+0x22/0x50 [ 44.704507] __kasan_record_aux_stack+0x8e/0xa0 [ 44.705076] __call_rcu_common.constprop.0+0x6a/0xb90 [ 44.705719] remove_vma+0x139/0x170 [ 44.706174] do_vmi_align_munmap+0xd4a/0x11f0 [ 44.706726] do_vmi_munmap+0x1f1/0x2b0 [ 44.707225] mmap_region+0x1f9/0x2660 [ 44.707696] do_mmap+0x854/0xf00 [ 44.708135] vm_mmap_pgoff+0x1a6/0x3a0 [ 44.708619] ksys_mmap_pgoff+0x3af/0x500 [ 44.709117] do_syscall_64+0x3f/0x90 [ 44.709584] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 44.710217] [ 44.710432] The buggy address belongs to the object at ffff88800c602ae0 [ 44.710432] which belongs to the cache vm_area_struct of size 168 [ 44.711911] The buggy address is located 88 bytes inside of [ 44.711911] freed 168-byte region [ffff88800c602ae0, ffff88800c602b88) [ 44.713299] [ 44.713515] The buggy address belongs to the physical page: [ 44.714166] page:00000000997332e8 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xc602 [ 44.715256] memcg:ffff88800d6f9a01 [ 44.715679] anon flags: 0x100000000000200(slab|node=0|zone=1) [ 44.716380] page_type: 0xffffffff() [ 44.716828] raw: 0100000000000200 ffff88800879fc80 ffffea000036a880 dead000000000005 [ 44.717736] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800d6f9a01 [ 44.718636] page dumped because: kasan: bad access detected [ 44.719312] [ 44.719525] Memory state around the buggy address: [ 44.720098] ffff88800c602a00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 44.720950] ffff88800c602a80: fb fb fb fb fc fc fc fc fc fc fc fc fa fb fb fb [ 44.721810] >ffff88800c602b00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 44.722656] ^ [ 44.723275] ffff88800c602b80: fb fc fc fc fc fc fc fc fc fa fb fb fb fb fb fb [ 44.724128] ffff88800c602c00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fc fc [ 44.724968] ================================================================== [ 44.725931] Disabling lock debugging due to kernel taint [ 47.343258] BUG: Bad rss-counter state mm:00000000ee3b4d1f type:MM_FILEPAGES val:33 [ 47.344658] BUG: Bad rss-counter state mm:00000000ee3b4d1f type:MM_ANONPAGES val:22 [ 47.889139] BUG: Bad rss-counter state mm:0000000015830a79 type:MM_FILEPAGES val:33 [ 47.890330] BUG: Bad rss-counter state mm:0000000015830a79 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:24511' (ECDSA) to the list of known hosts. 2023/06/20 02:24:06 fuzzer started 2023/06/20 02:24:06 dialing manager at localhost:44161 2023/06/20 02:24:06 checking machine... 2023/06/20 02:24:06 checking revisions... [ 48.528951] kmemleak: Automatic memory scanning thread ended 2023/06/20 02:24:06 testing simple program... [ 48.584982] cgroup: Unknown subsys name 'net' [ 48.672275] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 02:24:00 Registers: info registers vcpu 0 RAX=0000000000000000 RBX=ffff888016393b98 RCX=ffffffff8386b419 RDX=ffff888015e01b40 RSI=0000000000000000 RDI=0000000000000001 RBP=ffff888016867c48 RSP=ffff888016867b20 R8 =0000000000000001 R9 =0000000000000000 R10=0000000000000001 R11=0000000000000000 R12=0000000000000001 R13=00000000000000e6 R14=ffff888008c78000 R15=ffff888016393b00 RIP=ffffffff814c07e0 RFL=00000002 [-------] 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 00007f7d4c218900 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=00007f7d4c7cf618 CR3=000000000dad8000 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=ffffffff8450c50e RDX=ffffed100d9e6a01 RSI=0000000000000004 RDI=ffffffff812889a5 RBP=dffffc0000000000 RSP=ffff888008e27e70 R8 =0000000000000000 R9 =ffffed100d9e6a00 R10=ffff88806cf35003 R11=0000000000000001 R12=ffffffff85d3bed0 R13=1ffff110011c4fd3 R14=0000000000000000 R15=0000000000000000 RIP=ffffffff8450d49f 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=00007f7543d1bd50 CR3=000000000d808000 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=d1aeb9dea0c3748b4f47e7c8b9d870b8 XMM02=000000000011d6f0ec2efd57dc4c00df XMM03=0000000000124090433b710d584b5514 XMM04=1951b4dd2556c54d00000000000ae988 XMM05=e4cb8bb95a7664b60000000000135630 XMM06=1d921bcde48748970000000000133ee0 XMM07=e042d86d42eb936e0000000000124368 XMM08=433b710d584b5514000000000011d750 XMM09=00000000000000000000000000000000 XMM10=20200000000020202020202020200000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000