syzkaller login: [ 30.992982] BUG: Bad rss-counter state mm:000000001402c8b4 type:MM_FILEPAGES val:33 [ 30.993978] BUG: Bad rss-counter state mm:000000001402c8b4 type:MM_ANONPAGES val:22 [ 31.036302] ================================================================== [ 31.037322] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 31.038278] Read of size 8 at addr ffff88800c5e7310 by task sshd/220 [ 31.039056] [ 31.039271] CPU: 0 PID: 220 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 31.040149] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 31.041137] Call Trace: [ 31.041454] [ 31.041809] dump_stack_lvl+0x91/0xf0 [ 31.042464] print_report+0xcc/0x620 [ 31.042981] ? __virt_addr_valid+0x102/0x340 [ 31.043575] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.044209] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.044857] kasan_report+0xbe/0xf0 [ 31.045383] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.046032] vma_interval_tree_remove+0xc75/0xec0 [ 31.046662] vma_prepare+0xc54/0x11a0 [ 31.047158] __split_vma+0x5af/0x950 [ 31.047675] ? __pfx___split_vma+0x10/0x10 [ 31.048222] ? find_held_lock+0x2c/0x110 [ 31.048766] do_vmi_align_munmap+0x2ba/0x11f0 [ 31.049340] ? lock_is_held_type+0x9f/0x120 [ 31.049908] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 31.050551] ? mtree_range_walk+0x632/0x900 [ 31.051131] ? mas_walk+0x5c7/0x7c0 [ 31.051656] do_vmi_munmap+0x1f1/0x2b0 [ 31.052177] mmap_region+0x1f9/0x2660 [ 31.052685] ? vm_mmap_pgoff+0x15c/0x3a0 [ 31.053215] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 31.053948] ? __pfx_lock_acquire+0x10/0x10 [ 31.054490] ? __pfx_mmap_region+0x10/0x10 [ 31.055049] ? security_mmap_addr+0x7d/0xa0 [ 31.055614] ? get_unmapped_area+0x1f5/0x3f0 [ 31.056177] do_mmap+0x854/0xf00 [ 31.056639] vm_mmap_pgoff+0x1a6/0x3a0 [ 31.057146] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 31.057732] ksys_mmap_pgoff+0x3af/0x500 [ 31.058239] do_syscall_64+0x3f/0x90 [ 31.058748] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.059412] RIP: 0033:0x7f016fe22d82 [ 31.059956] 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 [ 31.062122] RSP: 002b:00007ffe671fd2c8 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 31.063027] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f016fe22d82 [ 31.063886] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f016f25c000 [ 31.064725] RBP: 00007f016f25c000 R08: 0000000000000009 R09: 0000000000001000 [ 31.065571] R10: 0000000000000812 R11: 0000000000000206 R12: 0000558435938f70 [ 31.066416] R13: 00007ffe671fd2e0 R14: 00007ffe671fd310 R15: 00007ffe671fd670 [ 31.067272] [ 31.067589] [ 31.067810] Allocated by task 213: [ 31.068237] kasan_save_stack+0x22/0x50 [ 31.068741] kasan_set_track+0x25/0x30 [ 31.069234] __kasan_slab_alloc+0x59/0x70 [ 31.069764] kmem_cache_alloc+0x16b/0x370 [ 31.070298] vm_area_dup+0x20/0x160 [ 31.070752] __split_vma+0x170/0x950 [ 31.071220] split_vma+0xc6/0x110 [ 31.071673] mprotect_fixup+0x8d2/0xb30 [ 31.072183] do_mprotect_pkey+0x87e/0xd40 [ 31.072706] __x64_sys_mprotect+0x78/0xc0 [ 31.073238] do_syscall_64+0x3f/0x90 [ 31.073722] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.074384] [ 31.074601] Freed by task 213: [ 31.074995] kasan_save_stack+0x22/0x50 [ 31.075522] kasan_set_track+0x25/0x30 [ 31.076020] kasan_save_free_info+0x2b/0x50 [ 31.076556] __kasan_slab_free+0x10a/0x190 [ 31.077096] kmem_cache_free+0x10d/0x4d0 [ 31.077617] rcu_core+0x8c8/0x2860 [ 31.078066] __do_softirq+0x1b7/0x7d4 [ 31.078547] [ 31.078759] Last potentially related work creation: [ 31.079342] kasan_save_stack+0x22/0x50 [ 31.079853] __kasan_record_aux_stack+0x8e/0xa0 [ 31.080423] __call_rcu_common.constprop.0+0x6a/0xb90 [ 31.081065] remove_vma+0x139/0x170 [ 31.081519] do_vmi_align_munmap+0xd4a/0x11f0 [ 31.082071] do_vmi_munmap+0x1f1/0x2b0 [ 31.082559] __vm_munmap+0x138/0x3a0 [ 31.083028] __x64_sys_munmap+0x59/0x80 [ 31.083536] do_syscall_64+0x3f/0x90 [ 31.084010] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.084652] [ 31.084869] The buggy address belongs to the object at ffff88800c5e72b8 [ 31.084869] which belongs to the cache vm_area_struct of size 168 [ 31.086358] The buggy address is located 88 bytes inside of [ 31.086358] freed 168-byte region [ffff88800c5e72b8, ffff88800c5e7360) [ 31.087769] [ 31.087988] The buggy address belongs to the physical page: [ 31.088657] page:00000000e143d204 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xc5e7 [ 31.089734] memcg:ffff888018e56b01 [ 31.090160] flags: 0x100000000000200(slab|node=0|zone=1) [ 31.090805] page_type: 0xffffffff() [ 31.091255] raw: 0100000000000200 ffff8880087a0c80 dead000000000122 0000000000000000 [ 31.092191] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff888018e56b01 [ 31.093096] page dumped because: kasan: bad access detected [ 31.093756] [ 31.093978] Memory state around the buggy address: [ 31.094551] ffff88800c5e7200: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 fc [ 31.095409] ffff88800c5e7280: fc fc fc fc fc fc fc fa fb fb fb fb fb fb fb fb [ 31.096291] >ffff88800c5e7300: fb fb fb fb fb fb fb fb fb fb fb fb fc fc fc fc [ 31.097142] ^ [ 31.097610] ffff88800c5e7380: fc fc fc fc fa fb fb fb fb fb fb fb fb fb fb fb [ 31.098467] ffff88800c5e7400: fb fb fb fb fb fb fb fb fb fc fc fc fc fc fc fc [ 31.099324] ================================================================== [ 31.100670] Disabling lock debugging due to kernel taint [ 33.087636] BUG: Bad rss-counter state mm:00000000d0efb324 type:MM_FILEPAGES val:33 [ 33.088645] BUG: Bad rss-counter state mm:00000000d0efb324 type:MM_ANONPAGES val:22 [ 33.629698] BUG: Bad rss-counter state mm:00000000c2440f5c type:MM_FILEPAGES val:33 [ 33.630837] BUG: Bad rss-counter state mm:00000000c2440f5c type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:58949' (ECDSA) to the list of known hosts. 2023/06/21 00:36:26 fuzzer started 2023/06/21 00:36:26 dialing manager at localhost:36067 2023/06/21 00:36:26 checking machine... 2023/06/21 00:36:26 checking revisions... [ 34.280778] kmemleak: Automatic memory scanning thread ended 2023/06/21 00:36:26 testing simple program... [ 34.345340] cgroup: Unknown subsys name 'net' [ 34.403629] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 00:36:26 Registers: info registers vcpu 0 RAX=0000000000000000 RBX=0000000000000001 RCX=1ffff110031c0e36 RDX=dffffc0000000000 RSI=ffffffff83871c52 RDI=ffff888018e07158 RBP=ffff888018e071b0 RSP=ffff888018e070e8 R8 =0000000000000001 R9 =ffff888018e07198 R10=0000000000038001 R11=0000000000091be9 R12=ffff888018e071b8 R13=ffff888018e071a0 R14=ffff888018e07199 R15=ffff888018e07158 RIP=ffffffff81130706 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 00007fa705a50900 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=00007fa706007618 CR3=000000000f11e000 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=6e69676f6c5f6d61702c78756e696c65 XMM02=755f6d61702c74696d7265705f6d6170 XMM03=2c766e655f6d61702c7374696d696c5f XMM04=6d61702c766e655f6d61702c7374696d XMM05=78696e755f6d61702c74696d7265705f XMM06=6469756e69676f6c5f6d61702c78756e XMM07=672065736f6c635f6e6f69737365733a XMM08=61662029286e65706f5f746964756100 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=ffff88806cf35000 RBX=0000000000000001 RCX=ffffffff8451250e RDX=ffffed100d9e6a01 RSI=0000000000000004 RDI=ffffffff81288ac5 RBP=dffffc0000000000 RSP=ffff888008e07e70 R8 =0000000000000000 R9 =ffffed100d9e6a00 R10=ffff88806cf35003 R11=ffff888008c04400 R12=ffffffff85d3d350 R13=1ffff110011c0fd3 R14=0000000000000000 R15=0000000000000000 RIP=ffffffff8451349f 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=00007f503a394000 CR3=000000000988a000 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=eee6d321a94babae6548291d9414d36e XMM02=2c67c8bc2e329bc300000000001194f0 XMM03=fb795ef6d65770560000000000120c48 XMM04=1c1809bf9f98ffa500000000000ae988 XMM05=19e9129bd510f2350000000000130aa8 XMM06=bad463566075365b000000000012f1a8 XMM07=e042d86d42eb936e0000000000120ec8 XMM08=f11e84e5c64ac4ed0000000000119550 XMM09=00000000000000000000000000000000 XMM10=20200000000020202020202020200000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000