syzkaller login: [ 40.945524] BUG: Bad rss-counter state mm:000000005b20e3f3 type:MM_FILEPAGES val:33 [ 40.946722] BUG: Bad rss-counter state mm:000000005b20e3f3 type:MM_ANONPAGES val:22 [ 41.044562] ================================================================== [ 41.045257] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 41.045972] Read of size 8 at addr ffff88800e65c5c8 by task sshd/220 [ 41.046561] [ 41.046727] CPU: 0 PID: 220 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 41.047493] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 41.048232] Call Trace: [ 41.048474] [ 41.048691] dump_stack_lvl+0x91/0xf0 [ 41.049063] print_report+0xcc/0x620 [ 41.049431] ? __virt_addr_valid+0x102/0x340 [ 41.049861] ? vma_interval_tree_remove+0xc75/0xec0 [ 41.050200] ? vma_interval_tree_remove+0xc75/0xec0 [ 41.050537] kasan_report+0xbe/0xf0 [ 41.050799] ? vma_interval_tree_remove+0xc75/0xec0 [ 41.051133] vma_interval_tree_remove+0xc75/0xec0 [ 41.051473] vma_prepare+0xc54/0x11a0 [ 41.051736] __split_vma+0x5af/0x950 [ 41.052008] ? __pfx___split_vma+0x10/0x10 [ 41.052318] ? find_held_lock+0x2c/0x110 [ 41.052618] do_vmi_align_munmap+0x2ba/0x11f0 [ 41.052960] ? lock_is_held_type+0x9f/0x120 [ 41.053275] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 41.053625] ? mtree_range_walk+0x632/0x900 [ 41.053949] ? mas_walk+0x5c7/0x7c0 [ 41.054224] do_vmi_munmap+0x1f1/0x2b0 [ 41.054510] mmap_region+0x1f9/0x2660 [ 41.054791] ? vm_mmap_pgoff+0x15c/0x3a0 [ 41.055099] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 41.055520] ? __pfx_lock_acquire+0x10/0x10 [ 41.055840] ? __pfx_mmap_region+0x10/0x10 [ 41.056156] ? security_mmap_addr+0x7d/0xa0 [ 41.056465] ? get_unmapped_area+0x1f5/0x3f0 [ 41.056799] do_mmap+0x854/0xf00 [ 41.057061] vm_mmap_pgoff+0x1a6/0x3a0 [ 41.057354] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 41.057686] ksys_mmap_pgoff+0x3af/0x500 [ 41.057979] do_syscall_64+0x3f/0x90 [ 41.058269] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 41.058646] RIP: 0033:0x7f2da47aed82 [ 41.058915] 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 [ 41.060171] RSP: 002b:00007ffd289cb5b8 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 41.060702] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f2da47aed82 [ 41.061199] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f2da3be8000 [ 41.061698] RBP: 00007f2da3be8000 R08: 0000000000000009 R09: 0000000000001000 [ 41.062203] R10: 0000000000000812 R11: 0000000000000206 R12: 00005636608ecb20 [ 41.062703] R13: 00007ffd289cb5d0 R14: 00007ffd289cb600 R15: 00007ffd289cb960 [ 41.063206] [ 41.063378] [ 41.063505] Allocated by task 213: [ 41.063754] kasan_save_stack+0x22/0x50 [ 41.064053] kasan_set_track+0x25/0x30 [ 41.064344] __kasan_slab_alloc+0x59/0x70 [ 41.064653] kmem_cache_alloc+0x16b/0x370 [ 41.064954] vm_area_dup+0x20/0x160 [ 41.065218] __split_vma+0x170/0x950 [ 41.065484] split_vma+0xc6/0x110 [ 41.065738] mprotect_fixup+0x8d2/0xb30 [ 41.066026] do_mprotect_pkey+0x87e/0xd40 [ 41.066328] __x64_sys_mprotect+0x78/0xc0 [ 41.066638] do_syscall_64+0x3f/0x90 [ 41.066911] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 41.067296] [ 41.067417] Freed by task 213: [ 41.067648] kasan_save_stack+0x22/0x50 [ 41.067935] kasan_set_track+0x25/0x30 [ 41.068226] kasan_save_free_info+0x2b/0x50 [ 41.068536] __kasan_slab_free+0x10a/0x190 [ 41.068841] kmem_cache_free+0x10d/0x4d0 [ 41.069141] rcu_core+0x8c8/0x2860 [ 41.069401] __do_softirq+0x1b7/0x7d4 [ 41.069681] [ 41.069809] Last potentially related work creation: [ 41.070160] kasan_save_stack+0x22/0x50 [ 41.070455] __kasan_record_aux_stack+0x8e/0xa0 [ 41.070789] __call_rcu_common.constprop.0+0x6a/0xb90 [ 41.071168] remove_vma+0x139/0x170 [ 41.071445] do_vmi_align_munmap+0xd4a/0x11f0 [ 41.071777] do_vmi_munmap+0x1f1/0x2b0 [ 41.072059] __vm_munmap+0x138/0x3a0 [ 41.072335] __x64_sys_munmap+0x59/0x80 [ 41.072619] do_syscall_64+0x3f/0x90 [ 41.072896] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 41.073280] [ 41.073406] Second to last potentially related work creation: [ 41.073804] kasan_save_stack+0x22/0x50 [ 41.074096] __kasan_record_aux_stack+0x8e/0xa0 [ 41.074426] __call_rcu_common.constprop.0+0x6a/0xb90 [ 41.074789] remove_vma+0x139/0x170 [ 41.075054] do_vmi_align_munmap+0xd4a/0x11f0 [ 41.075390] do_vmi_munmap+0x1f1/0x2b0 [ 41.075673] mmap_region+0x1f9/0x2660 [ 41.075952] do_mmap+0x854/0xf00 [ 41.076210] vm_mmap_pgoff+0x1a6/0x3a0 [ 41.076496] ksys_mmap_pgoff+0x3af/0x500 [ 41.076788] do_syscall_64+0x3f/0x90 [ 41.077067] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 41.077447] [ 41.077573] The buggy address belongs to the object at ffff88800e65c570 [ 41.077573] which belongs to the cache vm_area_struct of size 168 [ 41.078440] The buggy address is located 88 bytes inside of [ 41.078440] freed 168-byte region [ffff88800e65c570, ffff88800e65c618) [ 41.079261] [ 41.079394] The buggy address belongs to the physical page: [ 41.079791] page:00000000f2b6c631 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xe65c [ 41.080427] memcg:ffff88800dfcb001 [ 41.080671] flags: 0x100000000000200(slab|node=0|zone=1) [ 41.081048] page_type: 0xffffffff() [ 41.081315] raw: 0100000000000200 ffff88800879fc80 ffffea0000267940 dead000000000002 [ 41.081846] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800dfcb001 [ 41.082386] page dumped because: kasan: bad access detected [ 41.082773] [ 41.082894] Memory state around the buggy address: [ 41.083235] ffff88800e65c480: fc fa fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 41.083745] ffff88800e65c500: fb fb fb fb fb fb fc fc fc fc fc fc fc fc fa fb [ 41.084246] >ffff88800e65c580: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 41.084738] ^ [ 41.085122] ffff88800e65c600: fb fb fb fc fc fc fc fc fc fc fc 00 00 00 00 00 [ 41.085651] ffff88800e65c680: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 41.086148] ================================================================== [ 41.086678] Disabling lock debugging due to kernel taint [ 43.471424] BUG: Bad rss-counter state mm:00000000ee3ddc81 type:MM_FILEPAGES val:33 [ 43.472983] BUG: Bad rss-counter state mm:00000000ee3ddc81 type:MM_ANONPAGES val:22 [ 44.030784] BUG: Bad rss-counter state mm:000000009947961f type:MM_FILEPAGES val:33 [ 44.031939] BUG: Bad rss-counter state mm:000000009947961f type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:5410' (ECDSA) to the list of known hosts. 2023/06/20 00:50:12 fuzzer started 2023/06/20 00:50:12 dialing manager at localhost:44161 2023/06/20 00:50:12 checking machine... 2023/06/20 00:50:12 checking revisions... [ 44.771068] kmemleak: Automatic memory scanning thread ended 2023/06/20 00:50:13 testing simple program... [ 44.816240] cgroup: Unknown subsys name 'net' [ 44.870596] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 00:50:02 Registers: info registers vcpu 0 RAX=0000000080000000 RBX=ffff88800c9f3080 RCX=0000000000000000 RDX=1ffff1100193e610 RSI=ffffffff8189244d RDI=ffff888008ec0320 RBP=ffff88801937efa8 RSP=ffff88801a397a68 R8 =0000000000000005 R9 =0000000000000000 R10=0000000000000000 R11=0000000000000001 R12=ffff888008ec0320 R13=ffff88800c9f3080 R14=0000000000008000 R15=ffff88800c9f3090 RIP=ffffffff814c07eb 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 00007f9b7c0d9900 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=00007ffdbe0b3000 CR3=0000000019cc6000 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=635f6e6f69737365733a4d41503d706f XMM01=6f6c5f6d61702c78756e696c65735f6d XMM02=61702c74696d7265705f6d61702c7469 XMM03=655f6d61702c7374696d696c5f6d6170 XMM04=3d6c616e696d72657420322e322e302e XMM05=3d656d616e74736f682022646873732f XMM06=746f6f72223d746363612078756e696c XMM07=6e655f6d61702c7374696d696c5f6d61 XMM08=652075253d64692073253d706f000000 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=dffffc0000000000 RBX=ffffffff813ad420 RCX=ffffffff8609fb01 RDX=1ffff1100d9e135e RSI=ffffffff8450b05e RDI=ffff88806cf09b60 RBP=ffff88806cf09b30 RSP=ffff88806cf09a90 R8 =ffffffff8609fb08 R9 =ffff88806cf09ad8 R10=0000000000038001 R11=000000000000792d R12=ffff88806cf09b60 R13=0000000000000000 R14=ffff888008d751c0 R15=ffff88800c7d9ec0 RIP=ffffffff813ad42e RFL=00000282 [--S----] 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 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=00007ff42e44b460 CR3=000000001037c000 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=2032313a30353a3030203032206e754a XMM01=73732878696e755f6d6170203a5d3932 XMM02=65736f6c63206e6f6973736573203a29 XMM03=755f6d6170203a5d3932325b64687373 XMM04=69662068637573206f4e203a656c6163 XMM05=3a656c696620766e65206e65706f206f XMM06=65733a6468737328766e655f6d617020 XMM07=6b7a79732032313a30353a3030203032 XMM08=3d656e696c646d632022656369767265 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000