syzkaller login: [ 30.879237] BUG: Bad rss-counter state mm:000000003f29aa46 type:MM_FILEPAGES val:33 [ 30.880046] BUG: Bad rss-counter state mm:000000003f29aa46 type:MM_ANONPAGES val:22 [ 31.012951] ================================================================== [ 31.013701] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 31.014420] Read of size 8 at addr ffff88801a1d6ed8 by task sshd/220 [ 31.015007] [ 31.015172] CPU: 1 PID: 220 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 31.015825] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 31.016748] Call Trace: [ 31.016990] [ 31.017207] dump_stack_lvl+0x91/0xf0 [ 31.017606] print_report+0xcc/0x620 [ 31.017976] ? __virt_addr_valid+0x102/0x340 [ 31.018401] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.018891] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.019362] kasan_report+0xbe/0xf0 [ 31.019720] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.020186] vma_interval_tree_remove+0xc75/0xec0 [ 31.020641] vma_prepare+0xc54/0x11a0 [ 31.020998] __split_vma+0x5af/0x950 [ 31.021361] ? __pfx___split_vma+0x10/0x10 [ 31.021762] ? find_held_lock+0x2c/0x110 [ 31.022160] do_vmi_align_munmap+0x2ba/0x11f0 [ 31.022593] ? lock_is_held_type+0x9f/0x120 [ 31.022998] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 31.023461] ? mtree_range_walk+0x632/0x900 [ 31.023882] ? mas_walk+0x5c7/0x7c0 [ 31.024237] do_vmi_munmap+0x1f1/0x2b0 [ 31.024609] mmap_region+0x1f9/0x2660 [ 31.024972] ? vm_mmap_pgoff+0x15c/0x3a0 [ 31.025369] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 31.025909] ? __pfx_lock_acquire+0x10/0x10 [ 31.026311] ? __pfx_mmap_region+0x10/0x10 [ 31.026725] ? security_mmap_addr+0x7d/0xa0 [ 31.027130] ? get_unmapped_area+0x1f5/0x3f0 [ 31.027544] do_mmap+0x854/0xf00 [ 31.027870] vm_mmap_pgoff+0x1a6/0x3a0 [ 31.028247] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 31.028675] ksys_mmap_pgoff+0x3af/0x500 [ 31.029058] do_syscall_64+0x3f/0x90 [ 31.029437] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.029939] RIP: 0033:0x7f3897c69d82 [ 31.030285] 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 [ 31.031902] RSP: 002b:00007ffde9591e38 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 31.032597] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f3897c69d82 [ 31.033242] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f38970a3000 [ 31.033902] RBP: 00007f38970a3000 R08: 0000000000000009 R09: 0000000000001000 [ 31.034546] R10: 0000000000000812 R11: 0000000000000206 R12: 0000562f6a96dec0 [ 31.035185] R13: 00007ffde9591e50 R14: 00007ffde9591e80 R15: 00007ffde95921e0 [ 31.035837] [ 31.036058] [ 31.036220] Allocated by task 213: [ 31.036549] kasan_save_stack+0x22/0x50 [ 31.036930] kasan_set_track+0x25/0x30 [ 31.037320] __kasan_slab_alloc+0x59/0x70 [ 31.037722] kmem_cache_alloc+0x16b/0x370 [ 31.038117] vm_area_dup+0x20/0x160 [ 31.038466] __split_vma+0x170/0x950 [ 31.038819] split_vma+0xc6/0x110 [ 31.039150] mprotect_fixup+0x8d2/0xb30 [ 31.039532] do_mprotect_pkey+0x87e/0xd40 [ 31.039931] __x64_sys_mprotect+0x78/0xc0 [ 31.040328] do_syscall_64+0x3f/0x90 [ 31.040686] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.041244] [ 31.041431] Freed by task 19: [ 31.041722] kasan_save_stack+0x22/0x50 [ 31.042105] kasan_set_track+0x25/0x30 [ 31.042480] kasan_save_free_info+0x2b/0x50 [ 31.042883] __kasan_slab_free+0x10a/0x190 [ 31.043287] kmem_cache_free+0x10d/0x4d0 [ 31.043675] rcu_core+0x8c8/0x2860 [ 31.044013] __do_softirq+0x1b7/0x7d4 [ 31.044381] [ 31.044546] Last potentially related work creation: [ 31.044989] kasan_save_stack+0x22/0x50 [ 31.045393] __kasan_record_aux_stack+0x8e/0xa0 [ 31.045833] __call_rcu_common.constprop.0+0x6a/0xb90 [ 31.046323] remove_vma+0x139/0x170 [ 31.046667] do_vmi_align_munmap+0xd4a/0x11f0 [ 31.047090] do_vmi_munmap+0x1f1/0x2b0 [ 31.047458] __vm_munmap+0x138/0x3a0 [ 31.047811] __x64_sys_munmap+0x59/0x80 [ 31.048187] do_syscall_64+0x3f/0x90 [ 31.048557] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.049048] [ 31.049212] The buggy address belongs to the object at ffff88801a1d6e80 [ 31.049212] which belongs to the cache vm_area_struct of size 168 [ 31.050343] The buggy address is located 88 bytes inside of [ 31.050343] freed 168-byte region [ffff88801a1d6e80, ffff88801a1d6f28) [ 31.051409] [ 31.051574] The buggy address belongs to the physical page: [ 31.052076] page:00000000161241a1 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x1a1d6 [ 31.052909] memcg:ffff88800cc28101 [ 31.053237] flags: 0x100000000000200(slab|node=0|zone=1) [ 31.053738] page_type: 0xffffffff() [ 31.054084] raw: 0100000000000200 ffff8880087a0c80 dead000000000122 0000000000000000 [ 31.054784] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800cc28101 [ 31.055476] page dumped because: kasan: bad access detected [ 31.055979] [ 31.056141] Memory state around the buggy address: [ 31.056586] ffff88801a1d6d80: fc fc fc 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 31.057267] ffff88801a1d6e00: 00 00 00 00 00 00 00 00 fc fc fc fc fc fc fc fc [ 31.058026] >ffff88801a1d6e80: fa fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 31.058687] ^ [ 31.059238] ffff88801a1d6f00: fb fb fb fb fb fc fc fc fc fc fc fc fc fc fc fc [ 31.059889] ffff88801a1d6f80: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc [ 31.060534] ================================================================== [ 31.061228] Disabling lock debugging due to kernel taint [ 33.501528] BUG: Bad rss-counter state mm:0000000020eab3ff type:MM_FILEPAGES val:33 [ 33.502577] BUG: Bad rss-counter state mm:0000000020eab3ff type:MM_ANONPAGES val:22 [ 33.937970] BUG: Bad rss-counter state mm:000000000c5067b5 type:MM_FILEPAGES val:33 [ 33.939004] BUG: Bad rss-counter state mm:000000000c5067b5 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:61791' (ECDSA) to the list of known hosts. 2023/06/20 17:16:08 fuzzer started 2023/06/20 17:16:09 dialing manager at localhost:36067 2023/06/20 17:16:09 checking machine... 2023/06/20 17:16:09 checking revisions... [ 34.606496] kmemleak: Automatic memory scanning thread ended 2023/06/20 17:16:09 testing simple program... [ 34.637256] cgroup: Unknown subsys name 'net' [ 34.668666] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 17:16:08 Registers: info registers vcpu 0 RAX=dffffc0000000000 RBX=0000000000000000 RCX=0000000000000000 RDX=1ffff11001f3ae01 RSI=ffffffff83c5c643 RDI=ffff88800f207730 RBP=ffff88800f9d7000 RSP=ffff88800f207588 R8 =0000000000000005 R9 =0000000000000002 R10=0000000000000000 R11=0000091c0000091c R12=0000000000000001 R13=0000000000000000 R14=ffff88800f207728 R15=ffff888019d113c0 RIP=ffffffff83c5c697 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 00007fdcbf1a0900 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=00007fdcbf757618 CR3=000000000db92000 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=00007fe339345c80 CR3=0000000013a58000 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=4e875706e419fcad8b41f68328c7ae62 XMM02=ec2efd57dc4c00df000000000011b928 XMM03=bd6876d7ed32bd82000000000011b9f8 XMM04=164a3437c04219cf00000000000ae988 XMM05=19e9129bd510f2350000000000132478 XMM06=e79aed1d8919681500000000001312e0 XMM07=e042d86d42eb936e0000000000122920 XMM08=bd6876d7ed32bd82000000000011b9f8 XMM09=00000000000000000000000000000000 XMM10=20200000000020202020202020200000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000