syzkaller login: [ 33.816373] BUG: Bad rss-counter state mm:000000003bd0a982 type:MM_FILEPAGES val:33 [ 33.817835] BUG: Bad rss-counter state mm:000000003bd0a982 type:MM_ANONPAGES val:22 [ 33.993680] ================================================================== [ 33.994772] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 33.996007] Read of size 8 at addr ffff88801929e058 by task sshd/219 [ 33.996778] [ 33.996997] CPU: 1 PID: 219 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 33.997893] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 33.998870] Call Trace: [ 33.999190] [ 33.999481] dump_stack_lvl+0x91/0xf0 [ 33.999973] print_report+0xcc/0x620 [ 34.000462] ? __virt_addr_valid+0x102/0x340 [ 34.001035] ? vma_interval_tree_remove+0xc75/0xec0 [ 34.001660] ? vma_interval_tree_remove+0xc75/0xec0 [ 34.002277] kasan_report+0xbe/0xf0 [ 34.002757] ? vma_interval_tree_remove+0xc75/0xec0 [ 34.003379] vma_interval_tree_remove+0xc75/0xec0 [ 34.003989] vma_prepare+0xc54/0x11a0 [ 34.004470] __split_vma+0x5af/0x950 [ 34.004971] ? __pfx___split_vma+0x10/0x10 [ 34.005507] ? find_held_lock+0x2c/0x110 [ 34.006037] do_vmi_align_munmap+0x2ba/0x11f0 [ 34.006608] ? lock_is_held_type+0x9f/0x120 [ 34.007153] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 34.007769] ? mtree_range_walk+0x632/0x900 [ 34.008329] ? mas_walk+0x5c7/0x7c0 [ 34.008812] do_vmi_munmap+0x1f1/0x2b0 [ 34.009310] mmap_region+0x1f9/0x2660 [ 34.009798] ? vm_mmap_pgoff+0x15c/0x3a0 [ 34.010316] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 34.011040] ? __pfx_lock_acquire+0x10/0x10 [ 34.011574] ? __pfx_mmap_region+0x10/0x10 [ 34.012105] ? security_mmap_addr+0x7d/0xa0 [ 34.012640] ? get_unmapped_area+0x1f5/0x3f0 [ 34.013222] do_mmap+0x854/0xf00 [ 34.013663] vm_mmap_pgoff+0x1a6/0x3a0 [ 34.014174] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 34.014744] ksys_mmap_pgoff+0x3af/0x500 [ 34.015259] do_syscall_64+0x3f/0x90 [ 34.015741] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 34.016391] RIP: 0033:0x7f4e16c42d82 [ 34.016856] 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 [ 34.019014] RSP: 002b:00007fffbfc918d8 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 34.019927] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f4e16c42d82 [ 34.020791] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f4e1607c000 [ 34.021648] RBP: 00007f4e1607c000 R08: 0000000000000009 R09: 0000000000001000 [ 34.022505] R10: 0000000000000812 R11: 0000000000000206 R12: 0000557478ad0f60 [ 34.023361] R13: 00007fffbfc918f0 R14: 00007fffbfc91920 R15: 00007fffbfc91c80 [ 34.024224] [ 34.024518] [ 34.024751] Allocated by task 212: [ 34.025187] kasan_save_stack+0x22/0x50 [ 34.025697] kasan_set_track+0x25/0x30 [ 34.026199] __kasan_slab_alloc+0x59/0x70 [ 34.026726] kmem_cache_alloc+0x16b/0x370 [ 34.027251] vm_area_dup+0x20/0x160 [ 34.027712] __split_vma+0x170/0x950 [ 34.028186] split_vma+0xc6/0x110 [ 34.028632] mprotect_fixup+0x8d2/0xb30 [ 34.029152] do_mprotect_pkey+0x87e/0xd40 [ 34.029683] __x64_sys_mprotect+0x78/0xc0 [ 34.030207] do_syscall_64+0x3f/0x90 [ 34.030685] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 34.031333] [ 34.031549] Freed by task 212: [ 34.031941] kasan_save_stack+0x22/0x50 [ 34.032444] kasan_set_track+0x25/0x30 [ 34.032958] kasan_save_free_info+0x2b/0x50 [ 34.033505] __kasan_slab_free+0x10a/0x190 [ 34.034043] kmem_cache_free+0x10d/0x4d0 [ 34.034557] rcu_core+0x8c8/0x2860 [ 34.035007] __do_softirq+0x1b7/0x7d4 [ 34.035485] [ 34.035702] Last potentially related work creation: [ 34.036353] kasan_save_stack+0x22/0x50 [ 34.036871] __kasan_record_aux_stack+0x8e/0xa0 [ 34.037455] __call_rcu_common.constprop.0+0x6a/0xb90 [ 34.038099] remove_vma+0x139/0x170 [ 34.038556] do_vmi_align_munmap+0xd4a/0x11f0 [ 34.039119] do_vmi_munmap+0x1f1/0x2b0 [ 34.039608] __vm_munmap+0x138/0x3a0 [ 34.040081] __x64_sys_munmap+0x59/0x80 [ 34.040583] do_syscall_64+0x3f/0x90 [ 34.041080] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 34.041725] [ 34.041939] The buggy address belongs to the object at ffff88801929e000 [ 34.041939] which belongs to the cache vm_area_struct of size 168 [ 34.043418] The buggy address is located 88 bytes inside of [ 34.043418] freed 168-byte region [ffff88801929e000, ffff88801929e0a8) [ 34.044834] [ 34.045052] The buggy address belongs to the physical page: [ 34.045719] page:00000000bad3c7d3 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x1929e [ 34.046825] memcg:ffff88800d96bb01 [ 34.047255] flags: 0x100000000000200(slab|node=0|zone=1) [ 34.047915] page_type: 0xffffffff() [ 34.048368] raw: 0100000000000200 ffff88800879fc80 dead000000000122 0000000000000000 [ 34.049307] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800d96bb01 [ 34.050229] page dumped because: kasan: bad access detected [ 34.050902] [ 34.051118] Memory state around the buggy address: [ 34.051697] ffff88801929df00: 00 00 00 00 00 fc fc fc fc fc fc fc fc fc fc fc [ 34.052571] ffff88801929df80: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc [ 34.053452] >ffff88801929e000: fa fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 34.054319] ^ [ 34.055060] ffff88801929e080: fb fb fb fb fb fc fc fc fc fc fc fc fc fa fb fb [ 34.055934] ffff88801929e100: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 34.056814] ================================================================== [ 34.057777] Disabling lock debugging due to kernel taint [ 36.068639] BUG: Bad rss-counter state mm:000000002ea05aba type:MM_FILEPAGES val:33 [ 36.069650] BUG: Bad rss-counter state mm:000000002ea05aba type:MM_ANONPAGES val:22 [ 36.645210] BUG: Bad rss-counter state mm:00000000463f2023 type:MM_FILEPAGES val:33 [ 36.646351] BUG: Bad rss-counter state mm:00000000463f2023 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:45302' (ECDSA) to the list of known hosts. 2023/06/20 00:52:39 fuzzer started 2023/06/20 00:52:39 dialing manager at localhost:44161 2023/06/20 00:52:40 checking machine... 2023/06/20 00:52:40 checking revisions... [ 37.299105] kmemleak: Automatic memory scanning thread ended 2023/06/20 00:52:40 testing simple program... [ 37.343538] cgroup: Unknown subsys name 'net' [ 37.385737] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 00:52:37 Registers: info registers vcpu 0 RAX=0000000000000000 RBX=0000000000000001 RCX=ffffffff863b1c96 RDX=0000000000000001 RSI=0000000000000000 RDI=0000000000000001 RBP=ffff88806ce09af0 RSP=ffff88806ce09a28 R8 =ffffffff863b1c9a R9 =ffff88806ce09ad8 R10=0000000000038001 R11=000000000008a977 R12=ffff88806ce09af8 R13=ffff88806ce09ae0 R14=ffff88800b3c7f40 R15=ffff88806ce09a98 RIP=ffffffff81131153 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 00007fdea9968900 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=00007fdea9f1f618 CR3=000000000d8bc000 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=2039333a32353a3030203032206e754a XMM01=73732878696e755f6d6170203a5d3832 XMM02=65736f6c63206e6f6973736573203a29 XMM03=755f6d6170203a5d3832325b64687373 XMM04=69662068637573206f4e203a656c6163 XMM05=3a656c696620766e65206e65706f206f XMM06=65733a6468737328766e655f6d617020 XMM07=6b7a79732039333a32353a3030203032 XMM08=3d656e696c646d632022656369767265 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=ffffffff8180c585 RBX=ffffffff813ad420 RCX=ffffffff86137501 RDX=1ffff110011caf3a RSI=ffffffff8180c585 RDI=ffff888008e57a40 RBP=ffff888008e57a10 RSP=ffff888008e57970 R8 =ffffffff8613751e R9 =ffff888008e579b8 R10=0000000000038001 R11=0000000000020d8a R12=ffff888008e57a40 R13=0000000000000000 R14=ffff888008e2d1c0 R15=ffff8880098038d0 RIP=ffffffff813ad424 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=00007f7a66d48d70 CR3=0000000013a5c000 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=eef94b6402214987f94b81b10d851602 XMM02=ec2efd57dc4c00df000000000011cb80 XMM03=df38e889dd36ebbc000000000011cc50 XMM04=648b21b27be4eb0c00000000000ae988 XMM05=dfcdbad4f1609c3700000000001344e0 XMM06=806171799158d9670000000000134368 XMM07=e042d86d42eb936e0000000000124b58 XMM08=df38e889dd36ebbc000000000011cc50 XMM09=00000000000000000000000000000000 XMM10=20200000000020202020202020200000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000