syzkaller login: [ 39.140187] BUG: Bad rss-counter state mm:00000000de07a77f type:MM_FILEPAGES val:33 [ 39.141378] BUG: Bad rss-counter state mm:00000000de07a77f type:MM_ANONPAGES val:22 [ 39.309891] ================================================================== [ 39.310801] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 39.311744] Read of size 8 at addr ffff88800e4c7df0 by task sshd/220 [ 39.312516] [ 39.312873] CPU: 0 PID: 220 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 39.313742] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 39.314741] Call Trace: [ 39.315058] [ 39.315348] dump_stack_lvl+0x91/0xf0 [ 39.315836] print_report+0xcc/0x620 [ 39.316330] ? __virt_addr_valid+0x102/0x340 [ 39.316949] ? vma_interval_tree_remove+0xc75/0xec0 [ 39.317598] ? vma_interval_tree_remove+0xc75/0xec0 [ 39.318291] kasan_report+0xbe/0xf0 [ 39.318862] ? vma_interval_tree_remove+0xc75/0xec0 [ 39.319621] vma_interval_tree_remove+0xc75/0xec0 [ 39.320359] vma_prepare+0xc54/0x11a0 [ 39.320953] __split_vma+0x5af/0x950 [ 39.321530] ? __pfx___split_vma+0x10/0x10 [ 39.322164] ? find_held_lock+0x2c/0x110 [ 39.322809] do_vmi_align_munmap+0x2ba/0x11f0 [ 39.323510] ? lock_is_held_type+0x9f/0x120 [ 39.324184] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 39.324858] ? mtree_range_walk+0x632/0x900 [ 39.325435] ? mas_walk+0x5c7/0x7c0 [ 39.325938] do_vmi_munmap+0x1f1/0x2b0 [ 39.326431] mmap_region+0x1f9/0x2660 [ 39.326934] ? vm_mmap_pgoff+0x15c/0x3a0 [ 39.327578] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 39.328386] ? __pfx_lock_acquire+0x10/0x10 [ 39.328931] ? __pfx_mmap_region+0x10/0x10 [ 39.329467] ? security_mmap_addr+0x7d/0xa0 [ 39.329998] ? get_unmapped_area+0x1f5/0x3f0 [ 39.330553] do_mmap+0x854/0xf00 [ 39.330996] vm_mmap_pgoff+0x1a6/0x3a0 [ 39.331498] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 39.332075] ksys_mmap_pgoff+0x3af/0x500 [ 39.332590] do_syscall_64+0x3f/0x90 [ 39.333076] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 39.333732] RIP: 0033:0x7f70f53f7d82 [ 39.334188] 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 [ 39.336360] RSP: 002b:00007ffe352830b8 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 39.337295] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f70f53f7d82 [ 39.338150] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f70f4831000 [ 39.339014] RBP: 00007f70f4831000 R08: 0000000000000009 R09: 0000000000001000 [ 39.339865] R10: 0000000000000812 R11: 0000000000000206 R12: 000055628bf3df70 [ 39.340733] R13: 00007ffe352830d0 R14: 00007ffe35283100 R15: 00007ffe35283460 [ 39.341606] [ 39.341900] [ 39.342119] Allocated by task 213: [ 39.342551] kasan_save_stack+0x22/0x50 [ 39.343062] kasan_set_track+0x25/0x30 [ 39.343563] __kasan_slab_alloc+0x59/0x70 [ 39.344106] kmem_cache_alloc+0x16b/0x370 [ 39.344626] vm_area_dup+0x20/0x160 [ 39.345091] __split_vma+0x170/0x950 [ 39.345560] split_vma+0xc6/0x110 [ 39.346002] mprotect_fixup+0x8d2/0xb30 [ 39.346502] do_mprotect_pkey+0x87e/0xd40 [ 39.347028] __x64_sys_mprotect+0x78/0xc0 [ 39.347567] do_syscall_64+0x3f/0x90 [ 39.348040] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 39.348689] [ 39.348923] Freed by task 213: [ 39.349317] kasan_save_stack+0x22/0x50 [ 39.349832] kasan_set_track+0x25/0x30 [ 39.350408] kasan_save_free_info+0x2b/0x50 [ 39.350959] __kasan_slab_free+0x10a/0x190 [ 39.351532] kmem_cache_free+0x10d/0x4d0 [ 39.352051] rcu_core+0x8c8/0x2860 [ 39.352530] __do_softirq+0x1b7/0x7d4 [ 39.353047] [ 39.353288] Last potentially related work creation: [ 39.353895] kasan_save_stack+0x22/0x50 [ 39.354479] __kasan_record_aux_stack+0x8e/0xa0 [ 39.355088] __call_rcu_common.constprop.0+0x6a/0xb90 [ 39.355764] remove_vma+0x139/0x170 [ 39.356262] do_vmi_align_munmap+0xd4a/0x11f0 [ 39.356868] do_vmi_munmap+0x1f1/0x2b0 [ 39.357396] __vm_munmap+0x138/0x3a0 [ 39.357880] __x64_sys_munmap+0x59/0x80 [ 39.358419] do_syscall_64+0x3f/0x90 [ 39.358905] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 39.359584] [ 39.359812] Second to last potentially related work creation: [ 39.360534] kasan_save_stack+0x22/0x50 [ 39.361073] __kasan_record_aux_stack+0x8e/0xa0 [ 39.361686] __call_rcu_common.constprop.0+0x6a/0xb90 [ 39.362354] remove_vma+0x139/0x170 [ 39.362828] do_vmi_align_munmap+0xd4a/0x11f0 [ 39.363434] do_vmi_munmap+0x1f1/0x2b0 [ 39.363940] mmap_region+0x1f9/0x2660 [ 39.364447] do_mmap+0x854/0xf00 [ 39.364899] vm_mmap_pgoff+0x1a6/0x3a0 [ 39.365423] ksys_mmap_pgoff+0x3af/0x500 [ 39.365973] do_syscall_64+0x3f/0x90 [ 39.366525] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 39.367197] [ 39.367432] The buggy address belongs to the object at ffff88800e4c7d98 [ 39.367432] which belongs to the cache vm_area_struct of size 168 [ 39.368980] The buggy address is located 88 bytes inside of [ 39.368980] freed 168-byte region [ffff88800e4c7d98, ffff88800e4c7e40) [ 39.370474] [ 39.370701] The buggy address belongs to the physical page: [ 39.371395] page:00000000992c6ad0 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xe4c7 [ 39.372536] memcg:ffff88800ec24c01 [ 39.372993] anon flags: 0x100000000000200(slab|node=0|zone=1) [ 39.373733] page_type: 0xffffffff() [ 39.374287] raw: 0100000000000200 ffff88800879fc80 ffffea000039a580 dead000000000007 [ 39.375296] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800ec24c01 [ 39.376225] page dumped because: kasan: bad access detected [ 39.376933] [ 39.377159] Memory state around the buggy address: [ 39.377759] ffff88800e4c7c80: fc fc fc fc fc fc 00 00 00 00 00 00 00 00 00 00 [ 39.378644] ffff88800e4c7d00: 00 00 00 00 00 00 00 00 00 00 00 fc fc fc fc fc [ 39.379518] >ffff88800e4c7d80: fc fc fc fa fb fb fb fb fb fb fb fb fb fb fb fb [ 39.380405] ^ [ 39.381275] ffff88800e4c7e00: fb fb fb fb fb fb fb fb fc fc fc fc fc fc fc fc [ 39.382281] ffff88800e4c7e80: fa fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 39.383160] ================================================================== [ 39.384294] Disabling lock debugging due to kernel taint [ 41.448495] BUG: Bad rss-counter state mm:00000000c4b0523f type:MM_FILEPAGES val:33 [ 41.449569] BUG: Bad rss-counter state mm:00000000c4b0523f type:MM_ANONPAGES val:22 [ 41.922444] BUG: Bad rss-counter state mm:00000000cb32f4a4 type:MM_FILEPAGES val:33 [ 41.923499] BUG: Bad rss-counter state mm:00000000cb32f4a4 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:7719' (ECDSA) to the list of known hosts. 2023/06/19 17:12:46 fuzzer started 2023/06/19 17:12:46 dialing manager at localhost:44161 2023/06/19 17:12:46 checking machine... 2023/06/19 17:12:46 checking revisions... [ 42.660461] kmemleak: Automatic memory scanning thread ended 2023/06/19 17:12:47 testing simple program... [ 42.714922] cgroup: Unknown subsys name 'net' [ 42.757462] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 17:12:46 Registers: info registers vcpu 0 RAX=0000000000000000 RBX=ffff88806ce09b18 RCX=0000000000000001 RDX=1ffff1100d9c1364 RSI=ffffffff82198604 RDI=ffff88806ce09b20 RBP=000000000000000e RSP=ffff88806ce09a30 R8 =0000000000000001 R9 =ffff88806ce09a90 R10=0000000000038001 R11=000000000001cf8f R12=ffff88806ce09b18 R13=0000000000000000 R14=ffff888019570000 R15=ffff88800cd2d900 RIP=ffffffff813ad46e 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 00007f4cfed01900 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=00007f4cfecb501c CR3=000000000e804000 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=ffffffff00ffffffffffffffffffffff XMM01=707465675f6c697475646f6d6d61705f XMM02=ff000000000000ff0000000000ff0000 XMM03=66207463656e6e6f6373696420646576 XMM04=00000000000000000000000000000000 XMM05=00000000000000000000000000000000 XMM06=0d0c0f0e09080b0a0504070601000302 XMM07=00000000000000000000000000000000 XMM08=000a0d732a2e25006c61746166003367 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=ffff888008c58400 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=0000563954baf748 CR3=00000000145ec000 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=2036343a32313a3731203931206e754a XMM01=657463656e6e6f63736944203a5d3932 XMM02=302e303120746f6f722072657375206d XMM03=203a5d3932325b646873732072656c6c XMM04=69662068637573206f4e203a656c6163 XMM05=3a656c696620766e65206e65706f206f XMM06=65733a6468737328766e655f6d617020 XMM07=6b7a79732036343a32313a3731203931 XMM08=3d656e696c646d632022656369767265 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000