syzkaller login: [ 33.805001] BUG: Bad rss-counter state mm:000000006858d533 type:MM_FILEPAGES val:33 [ 33.806414] BUG: Bad rss-counter state mm:000000006858d533 type:MM_ANONPAGES val:22 [ 33.952832] ================================================================== [ 33.953923] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 33.955054] Read of size 8 at addr ffff88800db2e310 by task sshd/219 [ 33.956079] [ 33.956316] CPU: 0 PID: 219 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 33.957192] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 33.958204] Call Trace: [ 33.958529] <TASK> [ 33.958818] dump_stack_lvl+0x91/0xf0 [ 33.959324] print_report+0xcc/0x620 [ 33.959818] ? __virt_addr_valid+0x102/0x340 [ 33.960395] ? vma_interval_tree_remove+0xc75/0xec0 [ 33.961025] ? vma_interval_tree_remove+0xc75/0xec0 [ 33.961656] kasan_report+0xbe/0xf0 [ 33.962144] ? vma_interval_tree_remove+0xc75/0xec0 [ 33.962778] vma_interval_tree_remove+0xc75/0xec0 [ 33.963396] vma_prepare+0xc54/0x11a0 [ 33.963885] __split_vma+0x5af/0x950 [ 33.964393] ? __pfx___split_vma+0x10/0x10 [ 33.964933] ? find_held_lock+0x2c/0x110 [ 33.965482] do_vmi_align_munmap+0x2ba/0x11f0 [ 33.966061] ? lock_is_held_type+0x9f/0x120 [ 33.966606] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 33.967225] ? mtree_range_walk+0x632/0x900 [ 33.967773] ? mas_walk+0x5c7/0x7c0 [ 33.968262] do_vmi_munmap+0x1f1/0x2b0 [ 33.968767] mmap_region+0x1f9/0x2660 [ 33.969261] ? vm_mmap_pgoff+0x15c/0x3a0 [ 33.969793] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 33.970519] ? __pfx_lock_acquire+0x10/0x10 [ 33.971066] ? __pfx_mmap_region+0x10/0x10 [ 33.971600] ? security_mmap_addr+0x7d/0xa0 [ 33.972152] ? get_unmapped_area+0x1f5/0x3f0 [ 33.972729] do_mmap+0x854/0xf00 [ 33.973169] vm_mmap_pgoff+0x1a6/0x3a0 [ 33.973670] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 33.974246] ksys_mmap_pgoff+0x3af/0x500 [ 33.974760] do_syscall_64+0x3f/0x90 [ 33.975254] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 33.975910] RIP: 0033:0x7f8f7472cd82 [ 33.976389] 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 [ 33.978562] RSP: 002b:00007fff90cdac18 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 33.979491] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f8f7472cd82 [ 33.980386] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f8f73b66000 [ 33.981262] RBP: 00007f8f73b66000 R08: 0000000000000009 R09: 0000000000001000 [ 33.982127] R10: 0000000000000812 R11: 0000000000000206 R12: 00005581dabacf60 [ 33.983001] R13: 00007fff90cdac30 R14: 00007fff90cdac60 R15: 00007fff90cdafc0 [ 33.983876] </TASK> [ 33.984202] [ 33.984419] Allocated by task 212: [ 33.984848] kasan_save_stack+0x22/0x50 [ 33.985356] kasan_set_track+0x25/0x30 [ 33.985861] __kasan_slab_alloc+0x59/0x70 [ 33.986410] kmem_cache_alloc+0x16b/0x370 [ 33.986946] vm_area_dup+0x20/0x160 [ 33.987413] __split_vma+0x170/0x950 [ 33.987888] split_vma+0xc6/0x110 [ 33.988355] mprotect_fixup+0x8d2/0xb30 [ 33.988875] do_mprotect_pkey+0x87e/0xd40 [ 33.989412] __x64_sys_mprotect+0x78/0xc0 [ 33.989950] do_syscall_64+0x3f/0x90 [ 33.990439] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 33.991093] [ 33.991315] Freed by task 212: [ 33.991723] kasan_save_stack+0x22/0x50 [ 33.992247] kasan_set_track+0x25/0x30 [ 33.992759] kasan_save_free_info+0x2b/0x50 [ 33.993305] __kasan_slab_free+0x10a/0x190 [ 33.993845] kmem_cache_free+0x10d/0x4d0 [ 33.994370] rcu_core+0x8c8/0x2860 [ 33.994820] __do_softirq+0x1b7/0x7d4 [ 33.995311] [ 33.995531] Last potentially related work creation: [ 33.996130] kasan_save_stack+0x22/0x50 [ 33.996666] __kasan_record_aux_stack+0x8e/0xa0 [ 33.997254] __call_rcu_common.constprop.0+0x6a/0xb90 [ 33.997918] remove_vma+0x139/0x170 [ 33.998380] do_vmi_align_munmap+0xd4a/0x11f0 [ 33.998953] do_vmi_munmap+0x1f1/0x2b0 [ 33.999453] __vm_munmap+0x138/0x3a0 [ 33.999943] __x64_sys_munmap+0x59/0x80 [ 34.000473] do_syscall_64+0x3f/0x90 [ 34.000953] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 34.001609] [ 34.001833] Second to last potentially related work creation: [ 34.002541] kasan_save_stack+0x22/0x50 [ 34.003054] __kasan_record_aux_stack+0x8e/0xa0 [ 34.003653] __call_rcu_common.constprop.0+0x6a/0xb90 [ 34.004321] remove_vma+0x139/0x170 [ 34.004783] do_vmi_align_munmap+0xd4a/0x11f0 [ 34.005351] do_vmi_munmap+0x1f1/0x2b0 [ 34.005855] mmap_region+0x1f9/0x2660 [ 34.006351] do_mmap+0x854/0xf00 [ 34.006801] vm_mmap_pgoff+0x1a6/0x3a0 [ 34.007293] ksys_mmap_pgoff+0x3af/0x500 [ 34.007805] do_syscall_64+0x3f/0x90 [ 34.008302] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 34.008955] [ 34.009174] The buggy address belongs to the object at ffff88800db2e2b8 [ 34.009174] which belongs to the cache vm_area_struct of size 168 [ 34.010684] The buggy address is located 88 bytes inside of [ 34.010684] freed 168-byte region [ffff88800db2e2b8, ffff88800db2e360) [ 34.012109] [ 34.012346] The buggy address belongs to the physical page: [ 34.013012] page:00000000dfc8096b refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xdb2e [ 34.014125] memcg:ffff88800de88a01 [ 34.014566] flags: 0x100000000000200(slab|node=0|zone=1) [ 34.015237] page_type: 0xffffffff() [ 34.015706] raw: 0100000000000200 ffff88800879fc80 ffffea000032ab00 000000000000000a [ 34.016647] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800de88a01 [ 34.017563] page dumped because: kasan: bad access detected [ 34.018232] [ 34.018448] Memory state around the buggy address: [ 34.019031] ffff88800db2e200: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 fc [ 34.019892] ffff88800db2e280: fc fc fc fc fc fc fc fa fb fb fb fb fb fb fb fb [ 34.020777] >ffff88800db2e300: fb fb fb fb fb fb fb fb fb fb fb fb fc fc fc fc [ 34.021639] ^ [ 34.022106] ffff88800db2e380: fc fc fc fc 00 00 00 00 00 00 00 00 00 00 00 00 [ 34.022967] ffff88800db2e400: 00 00 00 00 00 00 00 00 00 fc fc fc fc fc fc fc [ 34.023825] ================================================================== [ 34.024817] Disabling lock debugging due to kernel taint [ 35.941533] BUG: Bad rss-counter state mm:0000000087c68bc6 type:MM_FILEPAGES val:33 [ 35.942541] BUG: Bad rss-counter state mm:0000000087c68bc6 type:MM_ANONPAGES val:22 [ 36.371502] BUG: Bad rss-counter state mm:00000000d8770782 type:MM_FILEPAGES val:33 [ 36.372848] BUG: Bad rss-counter state mm:00000000d8770782 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:10394' (ECDSA) to the list of known hosts. 2023/06/19 13:40:38 fuzzer started 2023/06/19 13:40:38 dialing manager at localhost:44161 2023/06/19 13:40:38 checking machine... 2023/06/19 13:40:38 checking revisions... [ 37.097381] kmemleak: Automatic memory scanning thread ended 2023/06/19 13:40:38 testing simple program... [ 37.139203] cgroup: Unknown subsys name 'net' [ 37.197832] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 13:40:33 Registers: info registers vcpu 0 RAX=ffffffff860965f3 RBX=0000000000000001 RCX=ffffffff860965ee RDX=0000000000000000 RSI=0000000000000000 RDI=1ffffffff0c12cbe RBP=ffff88806ce09af0 RSP=ffff88806ce09a28 R8 =ffffffff860965f2 R9 =ffff88806ce09ad8 R10=0000000000038001 R11=0000000000006054 R12=ffff88806ce09af8 R13=ffff88806ce09ae0 R14=ffff88801c977888 R15=ffff88806ce09a98 RIP=ffffffff81131127 RFL=00000216 [----AP-] 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 00007f8afb328900 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=00007f8afb8df618 CR3=000000000f1ee000 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=30343a3331203931206e754a3e36383c XMM01=7365733a646873732878696e755f6d61 XMM02=736f6c63206e6f6973736573203a296e XMM03=5f6d6170203a5d3832325b6468737320 XMM04=6456774875434142334f726f59427469 XMM05=485320415352203a3268737320363038 XMM06=206d6f726620746f6f7220726f662079 XMM07=00000000000000000000000000000000 XMM08=3a677562656420676f6c737973720000 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=00007f2eb6e67000 CR3=0000000015fec000 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=2037333a30343a3331203931206e754a XMM01=73732878696e755f6d6170203a5d3832 XMM02=65736f6c63206e6f6973736573203a29 XMM03=755f6d6170203a5d3832325b64687373 XMM04=69662068637573206f4e203a656c6163 XMM05=3a656c696620766e65206e65706f206f XMM06=65733a6468737328766e655f6d617020 XMM07=6b7a79732037333a30343a3331203931 XMM08=3d656e696c646d632022656369767265 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000