syzkaller login: [ 31.857342] BUG: Bad rss-counter state mm:00000000233570d4 type:MM_FILEPAGES val:33 [ 31.858380] BUG: Bad rss-counter state mm:00000000233570d4 type:MM_ANONPAGES val:22 [ 32.035582] ================================================================== [ 32.036703] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 32.037946] Read of size 8 at addr ffff888010224228 by task sshd/220 [ 32.038898] [ 32.039160] CPU: 1 PID: 220 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 32.040235] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 32.041333] Call Trace: [ 32.041678] [ 32.041977] dump_stack_lvl+0x91/0xf0 [ 32.042506] print_report+0xcc/0x620 [ 32.043016] ? __virt_addr_valid+0x102/0x340 [ 32.043603] ? vma_interval_tree_remove+0xc75/0xec0 [ 32.044266] ? vma_interval_tree_remove+0xc75/0xec0 [ 32.044919] kasan_report+0xbe/0xf0 [ 32.045419] ? vma_interval_tree_remove+0xc75/0xec0 [ 32.046075] vma_interval_tree_remove+0xc75/0xec0 [ 32.046707] vma_prepare+0xc54/0x11a0 [ 32.047213] __split_vma+0x5af/0x950 [ 32.047709] ? __pfx___split_vma+0x10/0x10 [ 32.048276] ? find_held_lock+0x2c/0x110 [ 32.048826] do_vmi_align_munmap+0x2ba/0x11f0 [ 32.049456] ? lock_is_held_type+0x9f/0x120 [ 32.050036] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 32.050693] ? mtree_range_walk+0x632/0x900 [ 32.051300] ? mas_walk+0x5c7/0x7c0 [ 32.051814] do_vmi_munmap+0x1f1/0x2b0 [ 32.052359] mmap_region+0x1f9/0x2660 [ 32.052874] ? vm_mmap_pgoff+0x15c/0x3a0 [ 32.053416] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 32.054171] ? __pfx_lock_acquire+0x10/0x10 [ 32.054736] ? __pfx_mmap_region+0x10/0x10 [ 32.055298] ? security_mmap_addr+0x7d/0xa0 [ 32.055861] ? get_unmapped_area+0x1f5/0x3f0 [ 32.056449] do_mmap+0x854/0xf00 [ 32.056916] vm_mmap_pgoff+0x1a6/0x3a0 [ 32.057436] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 32.058052] ksys_mmap_pgoff+0x3af/0x500 [ 32.058592] do_syscall_64+0x3f/0x90 [ 32.059100] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 32.059786] RIP: 0033:0x7f125752cd82 [ 32.060277] 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 [ 32.062570] RSP: 002b:00007ffc1118a178 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 32.063554] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f125752cd82 [ 32.064495] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f1256966000 [ 32.065379] RBP: 00007f1256966000 R08: 0000000000000009 R09: 0000000000001000 [ 32.066276] R10: 0000000000000812 R11: 0000000000000206 R12: 000055d0121ccf70 [ 32.067182] R13: 00007ffc1118a190 R14: 00007ffc1118a1c0 R15: 00007ffc1118a520 [ 32.068102] [ 32.068413] [ 32.068641] Allocated by task 213: [ 32.069093] kasan_save_stack+0x22/0x50 [ 32.069626] kasan_set_track+0x25/0x30 [ 32.070148] __kasan_slab_alloc+0x59/0x70 [ 32.070697] kmem_cache_alloc+0x16b/0x370 [ 32.071239] vm_area_dup+0x20/0x160 [ 32.071715] __split_vma+0x170/0x950 [ 32.072213] split_vma+0xc6/0x110 [ 32.072676] mprotect_fixup+0x8d2/0xb30 [ 32.073203] do_mprotect_pkey+0x87e/0xd40 [ 32.073749] __x64_sys_mprotect+0x78/0xc0 [ 32.074299] do_syscall_64+0x3f/0x90 [ 32.074799] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 32.075476] [ 32.075702] Freed by task 213: [ 32.076136] kasan_save_stack+0x22/0x50 [ 32.076665] kasan_set_track+0x25/0x30 [ 32.077194] kasan_save_free_info+0x2b/0x50 [ 32.077777] __kasan_slab_free+0x10a/0x190 [ 32.078359] kmem_cache_free+0x10d/0x4d0 [ 32.078915] rcu_core+0x8c8/0x2860 [ 32.079393] __do_softirq+0x1b7/0x7d4 [ 32.079913] [ 32.080159] Last potentially related work creation: [ 32.080806] kasan_save_stack+0x22/0x50 [ 32.081355] __kasan_record_aux_stack+0x8e/0xa0 [ 32.081999] __call_rcu_common.constprop.0+0x6a/0xb90 [ 32.082705] remove_vma+0x139/0x170 [ 32.083269] do_vmi_align_munmap+0xd4a/0x11f0 [ 32.083886] do_vmi_munmap+0x1f1/0x2b0 [ 32.084441] __vm_munmap+0x138/0x3a0 [ 32.084957] __x64_sys_munmap+0x59/0x80 [ 32.085508] do_syscall_64+0x3f/0x90 [ 32.086038] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 32.086737] [ 32.086972] The buggy address belongs to the object at ffff8880102241d0 [ 32.086972] which belongs to the cache vm_area_struct of size 168 [ 32.088650] The buggy address is located 88 bytes inside of [ 32.088650] freed 168-byte region [ffff8880102241d0, ffff888010224278) [ 32.090232] [ 32.090473] The buggy address belongs to the physical page: [ 32.091224] page:0000000062a765e7 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x10224 [ 32.092483] memcg:ffff88801957cc01 [ 32.092966] flags: 0x100000000000200(slab|node=0|zone=1) [ 32.093702] page_type: 0xffffffff() [ 32.094213] raw: 0100000000000200 ffff8880087a0c80 dead000000000122 0000000000000000 [ 32.095265] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88801957cc01 [ 32.096291] page dumped because: kasan: bad access detected [ 32.097048] [ 32.097289] Memory state around the buggy address: [ 32.097955] ffff888010224100: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 32.098925] ffff888010224180: 00 00 fc fc fc fc fc fc fc fc fa fb fb fb fb fb [ 32.099926] >ffff888010224200: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fc [ 32.100904] ^ [ 32.101534] ffff888010224280: fc fc fc fc fc fc fc fa fb fb fb fb fb fb fb fb [ 32.102512] ffff888010224300: fb fb fb fb fb fb fb fb fb fb fb fb fc fc fc fc [ 32.103476] ================================================================== [ 32.104595] Disabling lock debugging due to kernel taint [ 34.053557] BUG: Bad rss-counter state mm:0000000087581038 type:MM_FILEPAGES val:33 [ 34.054731] BUG: Bad rss-counter state mm:0000000087581038 type:MM_ANONPAGES val:22 [ 34.596176] BUG: Bad rss-counter state mm:00000000159066d7 type:MM_FILEPAGES val:33 [ 34.597366] BUG: Bad rss-counter state mm:00000000159066d7 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:28919' (ECDSA) to the list of known hosts. 2023/06/20 22:32:44 fuzzer started 2023/06/20 22:32:45 dialing manager at localhost:36067 2023/06/20 22:32:45 checking machine... 2023/06/20 22:32:45 checking revisions... [ 35.192493] kmemleak: Automatic memory scanning thread ended 2023/06/20 22:32:45 testing simple program... [ 35.238863] cgroup: Unknown subsys name 'net' [ 35.277616] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 22:32:44 Registers: info registers vcpu 0 RAX=ffff7fffffffffff RBX=1ffff11003318e85 RCX=ffffffff812d8f13 RDX=0000000000000000 RSI=0000000000000008 RDI=ffffffff85d3d350 RBP=0000000000000000 RSP=ffff8880198c73f8 R8 =0000000000000000 R9 =0000000000000000 R10=ffffffff85d3d357 R11=0000099600000996 R12=0000000000000002 R13=0000000000000000 R14=ffffffff8560b640 R15=0000000000000000 RIP=ffffffff8180f079 RFL=00000212 [----A--] 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 00007f57c141e900 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=00007f57c19d5618 CR3=0000000017db0000 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=0000000000000001 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=00007fe3820b8e08 CR3=000000000d5b2000 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=5a90243c6be588958e4513e8152d2de2 XMM02=000000000011ac08ec2efd57dc4c00df XMM03=00000000001220a86750bb3d9734e6e8 XMM04=a8084288a9d0332a00000000000ae988 XMM05=19e9129bd510f2350000000000131f78 XMM06=4fda316b135da52b0000000000131e00 XMM07=e042d86d42eb936e0000000000122328 XMM08=6750bb3d9734e6e8000000000011ac68 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000