syzkaller login: [ 43.840950] BUG: Bad rss-counter state mm:0000000082f8e0d6 type:MM_FILEPAGES val:33 [ 43.842021] BUG: Bad rss-counter state mm:0000000082f8e0d6 type:MM_ANONPAGES val:22 [ 44.017280] ================================================================== [ 44.018367] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 44.019593] Read of size 8 at addr ffff88800e166968 by task sshd/220 [ 44.020400] [ 44.020626] CPU: 0 PID: 220 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 44.021489] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 44.022501] Call Trace: [ 44.022830] [ 44.023120] dump_stack_lvl+0x91/0xf0 [ 44.023604] print_report+0xcc/0x620 [ 44.024088] ? __virt_addr_valid+0x102/0x340 [ 44.024649] ? vma_interval_tree_remove+0xc75/0xec0 [ 44.025269] ? vma_interval_tree_remove+0xc75/0xec0 [ 44.025899] kasan_report+0xbe/0xf0 [ 44.026380] ? vma_interval_tree_remove+0xc75/0xec0 [ 44.027012] vma_interval_tree_remove+0xc75/0xec0 [ 44.027615] vma_prepare+0xc54/0x11a0 [ 44.028095] __split_vma+0x5af/0x950 [ 44.028593] ? __pfx___split_vma+0x10/0x10 [ 44.029127] ? find_held_lock+0x2c/0x110 [ 44.029648] do_vmi_align_munmap+0x2ba/0x11f0 [ 44.030212] ? lock_is_held_type+0x9f/0x120 [ 44.030774] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 44.031376] ? mtree_range_walk+0x632/0x900 [ 44.031928] ? mas_walk+0x5c7/0x7c0 [ 44.032415] do_vmi_munmap+0x1f1/0x2b0 [ 44.032913] mmap_region+0x1f9/0x2660 [ 44.033397] ? vm_mmap_pgoff+0x15c/0x3a0 [ 44.033906] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 44.034619] ? __pfx_lock_acquire+0x10/0x10 [ 44.035149] ? __pfx_mmap_region+0x10/0x10 [ 44.035684] ? security_mmap_addr+0x7d/0xa0 [ 44.036222] ? get_unmapped_area+0x1f5/0x3f0 [ 44.036783] do_mmap+0x854/0xf00 [ 44.037222] vm_mmap_pgoff+0x1a6/0x3a0 [ 44.037721] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 44.038296] ksys_mmap_pgoff+0x3af/0x500 [ 44.038820] do_syscall_64+0x3f/0x90 [ 44.039291] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 44.039934] RIP: 0033:0x7f3bdaa94d82 [ 44.040411] 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 [ 44.042532] RSP: 002b:00007ffe14a48208 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 44.043432] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f3bdaa94d82 [ 44.044283] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f3bd9ece000 [ 44.045129] RBP: 00007f3bd9ece000 R08: 0000000000000009 R09: 0000000000001000 [ 44.045976] R10: 0000000000000812 R11: 0000000000000206 R12: 000055d29c10fd90 [ 44.046822] R13: 00007ffe14a48220 R14: 00007ffe14a48250 R15: 00007ffe14a485b0 [ 44.047685] [ 44.047984] [ 44.048199] Allocated by task 212: [ 44.048661] kasan_save_stack+0x22/0x50 [ 44.049170] kasan_set_track+0x25/0x30 [ 44.049662] __kasan_slab_alloc+0x59/0x70 [ 44.050193] kmem_cache_alloc+0x16b/0x370 [ 44.050708] vm_area_dup+0x20/0x160 [ 44.051164] __split_vma+0x170/0x950 [ 44.051631] split_vma+0xc6/0x110 [ 44.052074] mprotect_fixup+0x8d2/0xb30 [ 44.052596] do_mprotect_pkey+0x87e/0xd40 [ 44.053117] __x64_sys_mprotect+0x78/0xc0 [ 44.053637] do_syscall_64+0x3f/0x90 [ 44.054106] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 44.054745] [ 44.054958] Freed by task 212: [ 44.055354] kasan_save_stack+0x22/0x50 [ 44.055858] kasan_set_track+0x25/0x30 [ 44.056355] kasan_save_free_info+0x2b/0x50 [ 44.056899] __kasan_slab_free+0x10a/0x190 [ 44.057425] kmem_cache_free+0x10d/0x4d0 [ 44.057927] rcu_core+0x8c8/0x2860 [ 44.058368] __do_softirq+0x1b7/0x7d4 [ 44.058844] [ 44.059060] Last potentially related work creation: [ 44.059645] kasan_save_stack+0x22/0x50 [ 44.060146] __kasan_record_aux_stack+0x8e/0xa0 [ 44.060732] __call_rcu_common.constprop.0+0x6a/0xb90 [ 44.061364] remove_vma+0x139/0x170 [ 44.061822] do_vmi_align_munmap+0xd4a/0x11f0 [ 44.062373] do_vmi_munmap+0x1f1/0x2b0 [ 44.062855] __vm_munmap+0x138/0x3a0 [ 44.063321] __x64_sys_munmap+0x59/0x80 [ 44.063815] do_syscall_64+0x3f/0x90 [ 44.064282] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 44.064929] [ 44.065147] Second to last potentially related work creation: [ 44.065822] kasan_save_stack+0x22/0x50 [ 44.066331] __kasan_record_aux_stack+0x8e/0xa0 [ 44.066896] __call_rcu_common.constprop.0+0x6a/0xb90 [ 44.067529] remove_vma+0x139/0x170 [ 44.067979] do_vmi_align_munmap+0xd4a/0x11f0 [ 44.068552] do_vmi_munmap+0x1f1/0x2b0 [ 44.069030] mmap_region+0x1f9/0x2660 [ 44.069503] do_mmap+0x854/0xf00 [ 44.069938] vm_mmap_pgoff+0x1a6/0x3a0 [ 44.070423] ksys_mmap_pgoff+0x3af/0x500 [ 44.070921] do_syscall_64+0x3f/0x90 [ 44.071390] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 44.072031] [ 44.072248] The buggy address belongs to the object at ffff88800e166910 [ 44.072248] which belongs to the cache vm_area_struct of size 168 [ 44.073707] The buggy address is located 88 bytes inside of [ 44.073707] freed 168-byte region [ffff88800e166910, ffff88800e1669b8) [ 44.075094] [ 44.075307] The buggy address belongs to the physical page: [ 44.075964] page:000000007e1f3eae refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xe166 [ 44.077044] memcg:ffff88800e0bd201 [ 44.077470] anon flags: 0x100000000000200(slab|node=0|zone=1) [ 44.078162] page_type: 0xffffffff() [ 44.078607] raw: 0100000000000200 ffff88800879fc80 0000000000000000 dead000000000001 [ 44.079532] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800e0bd201 [ 44.080452] page dumped because: kasan: bad access detected [ 44.081109] [ 44.081322] Memory state around the buggy address: [ 44.081893] ffff88800e166800: fc fc fc fc fc fa fb fb fb fb fb fb fb fb fb fb [ 44.082751] ffff88800e166880: fb fb fb fb fb fb fb fb fb fb fc fc fc fc fc fc [ 44.083598] >ffff88800e166900: fc fc fa fb fb fb fb fb fb fb fb fb fb fb fb fb [ 44.084448] ^ [ 44.085230] ffff88800e166980: fb fb fb fb fb fb fb fc fc fc fc fc fc fc fc 00 [ 44.086091] ffff88800e166a00: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 44.086933] ================================================================== [ 44.087974] Disabling lock debugging due to kernel taint [ 45.981707] BUG: Bad rss-counter state mm:000000003b7331c5 type:MM_FILEPAGES val:33 [ 45.982511] BUG: Bad rss-counter state mm:000000003b7331c5 type:MM_ANONPAGES val:22 [ 46.431750] BUG: Bad rss-counter state mm:00000000e5f89da2 type:MM_FILEPAGES val:33 [ 46.433257] BUG: Bad rss-counter state mm:00000000e5f89da2 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:62071' (ECDSA) to the list of known hosts. 2023/06/19 12:51:40 fuzzer started 2023/06/19 12:51:41 dialing manager at localhost:44161 2023/06/19 12:51:41 checking machine... 2023/06/19 12:51:41 checking revisions... [ 47.152376] kmemleak: Automatic memory scanning thread ended 2023/06/19 12:51:41 testing simple program... [ 47.202426] cgroup: Unknown subsys name 'net' [ 47.258810] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 12:51:35 Registers: info registers vcpu 0 RAX=ffff88806ce35000 RBX=0000000000000000 RCX=ffffffff8450c50e RDX=ffffed100d9c6a01 RSI=0000000000000004 RDI=ffffffff812889a5 RBP=dffffc0000000000 RSP=ffffffff85407e10 R8 =0000000000000000 R9 =ffffed100d9c6a00 R10=ffff88806ce35003 R11=ffff888008c58000 R12=ffffffff85d3bed0 R13=1ffffffff0a80fc7 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 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=00007fee187da1b0 CR3=000000000c5fa000 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=eea5d8a341f3a3ab3e4b9bff03530e09 XMM02=000000000011ca50ec2efd57dc4c00df XMM03=00000000001237a0d1f8be7965c1dc2b XMM04=320af304066a058300000000000ae988 XMM05=e4cb8bb95a7664b60000000000134df0 XMM06=b6ca20d781711e530000000000133c58 XMM07=e042d86d42eb936e0000000000123a78 XMM08=d1f8be7965c1dc2b000000000011cab0 XMM09=00000000000000000000000000000000 XMM10=20200000000020202020202020200000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=ffffffff81847452 RBX=ffffffff813ad420 RCX=ffffffff8613da01 RDX=1ffff11001974f53 RSI=ffffffff81847452 RDI=ffff88800cba7b08 RBP=ffff88800cba7ad8 RSP=ffff88800cba7a38 R8 =ffffffff8613daa0 R9 =ffff88800cba7a80 R10=0000000000038001 R11=0000000000021e78 R12=ffff88800cba7b08 R13=0000000000000000 R14=ffff88800fce8000 R15=ffff88800e534be0 RIP=ffffffff813ad420 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 00007fc49b228900 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=00007ffdcd558000 CR3=000000001a336000 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=74696d7265705f6d61703d73726f746e XMM02=000000000000000000000000000000ff XMM03=5320444f4854454d5f54505952434e45 XMM04=40404040404040404040404040404040 XMM05=5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a XMM06=20202020202020202020202020202020 XMM07=00000000000000000000000000000000 XMM08=61662029286e65706f5f746964756100 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000