syzkaller login: [ 60.882856] BUG: Bad rss-counter state mm:000000008b8e8060 type:MM_FILEPAGES val:33 [ 60.884115] BUG: Bad rss-counter state mm:000000008b8e8060 type:MM_ANONPAGES val:22 [ 61.022556] ================================================================== [ 61.023441] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 61.024440] Read of size 8 at addr ffff88800d5b5df0 by task sshd/220 [ 61.025268] [ 61.025661] CPU: 1 PID: 220 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 61.026561] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 61.027642] Call Trace: [ 61.028007] [ 61.028317] dump_stack_lvl+0x91/0xf0 [ 61.028842] print_report+0xcc/0x620 [ 61.029368] ? __virt_addr_valid+0x102/0x340 [ 61.029954] ? vma_interval_tree_remove+0xc75/0xec0 [ 61.030611] ? vma_interval_tree_remove+0xc75/0xec0 [ 61.031287] kasan_report+0xbe/0xf0 [ 61.031801] ? vma_interval_tree_remove+0xc75/0xec0 [ 61.032480] vma_interval_tree_remove+0xc75/0xec0 [ 61.033146] vma_prepare+0xc54/0x11a0 [ 61.033673] __split_vma+0x5af/0x950 [ 61.034191] ? __pfx___split_vma+0x10/0x10 [ 61.034775] ? find_held_lock+0x2c/0x110 [ 61.035324] do_vmi_align_munmap+0x2ba/0x11f0 [ 61.035926] ? lock_is_held_type+0x9f/0x120 [ 61.036511] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 61.037178] ? mtree_range_walk+0x632/0x900 [ 61.037783] ? mas_walk+0x5c7/0x7c0 [ 61.038303] do_vmi_munmap+0x1f1/0x2b0 [ 61.038863] mmap_region+0x1f9/0x2660 [ 61.039394] ? vm_mmap_pgoff+0x15c/0x3a0 [ 61.039945] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 61.040719] ? __pfx_lock_acquire+0x10/0x10 [ 61.041276] ? __pfx_mmap_region+0x10/0x10 [ 61.041851] ? security_mmap_addr+0x7d/0xa0 [ 61.042432] ? get_unmapped_area+0x1f5/0x3f0 [ 61.043046] do_mmap+0x854/0xf00 [ 61.043523] vm_mmap_pgoff+0x1a6/0x3a0 [ 61.044061] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 61.044683] ksys_mmap_pgoff+0x3af/0x500 [ 61.045226] do_syscall_64+0x3f/0x90 [ 61.045734] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 61.046446] RIP: 0033:0x7fb06a661d82 [ 61.046977] 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 [ 61.049308] RSP: 002b:00007ffd414e85d8 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 61.050309] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007fb06a661d82 [ 61.051261] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007fb069a9b000 [ 61.052184] RBP: 00007fb069a9b000 R08: 0000000000000009 R09: 0000000000001000 [ 61.053113] R10: 0000000000000812 R11: 0000000000000206 R12: 00005630ca020ec0 [ 61.054041] R13: 00007ffd414e85f0 R14: 00007ffd414e8620 R15: 00007ffd414e8980 [ 61.054962] [ 61.055273] [ 61.055503] Allocated by task 213: [ 61.055962] kasan_save_stack+0x22/0x50 [ 61.056500] kasan_set_track+0x25/0x30 [ 61.057031] __kasan_slab_alloc+0x59/0x70 [ 61.057603] kmem_cache_alloc+0x16b/0x370 [ 61.058130] vm_area_dup+0x20/0x160 [ 61.058591] __split_vma+0x170/0x950 [ 61.059104] split_vma+0xc6/0x110 [ 61.059575] mprotect_fixup+0x8d2/0xb30 [ 61.060119] do_mprotect_pkey+0x87e/0xd40 [ 61.060669] __x64_sys_mprotect+0x78/0xc0 [ 61.061192] do_syscall_64+0x3f/0x90 [ 61.061689] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 61.062391] [ 61.062631] Freed by task 213: [ 61.063067] kasan_save_stack+0x22/0x50 [ 61.063622] kasan_set_track+0x25/0x30 [ 61.064156] kasan_save_free_info+0x2b/0x50 [ 61.064721] __kasan_slab_free+0x10a/0x190 [ 61.065300] kmem_cache_free+0x10d/0x4d0 [ 61.065837] rcu_core+0x8c8/0x2860 [ 61.066278] __do_softirq+0x1b7/0x7d4 [ 61.066781] [ 61.067113] Last potentially related work creation: [ 61.067752] kasan_save_stack+0x22/0x50 [ 61.068290] __kasan_record_aux_stack+0x8e/0xa0 [ 61.068889] __call_rcu_common.constprop.0+0x6a/0xb90 [ 61.069524] remove_vma+0x139/0x170 [ 61.070012] do_vmi_align_munmap+0xd4a/0x11f0 [ 61.070616] do_vmi_munmap+0x1f1/0x2b0 [ 61.071156] __vm_munmap+0x138/0x3a0 [ 61.071660] __x64_sys_munmap+0x59/0x80 [ 61.072194] do_syscall_64+0x3f/0x90 [ 61.072705] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 61.073339] [ 61.073553] The buggy address belongs to the object at ffff88800d5b5d98 [ 61.073553] which belongs to the cache vm_area_struct of size 168 [ 61.075154] The buggy address is located 88 bytes inside of [ 61.075154] freed 168-byte region [ffff88800d5b5d98, ffff88800d5b5e40) [ 61.076676] [ 61.076894] The buggy address belongs to the physical page: [ 61.077543] page:00000000118c0f8b refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xd5b5 [ 61.078739] memcg:ffff88800eb62101 [ 61.079222] flags: 0x100000000000200(slab|node=0|zone=1) [ 61.079925] page_type: 0xffffffff() [ 61.080415] raw: 0100000000000200 ffff8880087a0c80 ffffea0000328100 dead000000000006 [ 61.081437] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800eb62101 [ 61.082443] page dumped because: kasan: bad access detected [ 61.083177] [ 61.083416] Memory state around the buggy address: [ 61.084071] ffff88800d5b5c80: fc fc fc fc fc fc 00 00 00 00 00 00 00 00 00 00 [ 61.085026] ffff88800d5b5d00: 00 00 00 00 00 00 00 00 00 00 00 fc fc fc fc fc [ 61.085983] >ffff88800d5b5d80: fc fc fc fa fb fb fb fb fb fb fb fb fb fb fb fb [ 61.086944] ^ [ 61.087833] ffff88800d5b5e00: fb fb fb fb fb fb fb fb fc fc fc fc fc fc fc fc [ 61.088779] ffff88800d5b5e80: fa fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 61.089718] ================================================================== [ 61.090726] Disabling lock debugging due to kernel taint [ 63.291347] BUG: Bad rss-counter state mm:0000000081936418 type:MM_FILEPAGES val:33 [ 63.292584] BUG: Bad rss-counter state mm:0000000081936418 type:MM_ANONPAGES val:22 [ 63.721920] BUG: Bad rss-counter state mm:00000000efade30e type:MM_FILEPAGES val:33 [ 63.723232] BUG: Bad rss-counter state mm:00000000efade30e type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:16199' (ECDSA) to the list of known hosts. 2023/06/20 22:06:35 fuzzer started 2023/06/20 22:06:35 dialing manager at localhost:36067 2023/06/20 22:06:35 checking machine... 2023/06/20 22:06:35 checking revisions... [ 64.495765] kmemleak: Automatic memory scanning thread ended 2023/06/20 22:06:35 testing simple program... [ 64.544951] cgroup: Unknown subsys name 'net' [ 64.581001] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 22:06:34 Registers: info registers vcpu 0 RAX=ffff88806ce35000 RBX=0000000000000000 RCX=ffffffff8451250e RDX=ffffed100d9c6a01 RSI=0000000000000004 RDI=ffffffff81288ac5 RBP=dffffc0000000000 RSP=ffffffff85407e10 R8 =0000000000000000 R9 =ffffed100d9c6a00 R10=ffff88806ce35003 R11=ffff888008c04000 R12=ffffffff85d3d350 R13=1ffffffff0a80fc7 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 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=00007f6cf9bd3990 CR3=000000000d63c000 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=816eaa8782d92289644f12d0e75e02e6 XMM02=000000000011b2e8d59e07bde36eea69 XMM03=000000000011b410ec2efd57dc4c00df XMM04=475bd75745ccad6c00000000000ae988 XMM05=8df174bfe8116cda0000000000133170 XMM06=4fda316b135da52b0000000000131f60 XMM07=fb795ef6d657705600000000001221f0 XMM08=2c67c8bc2e329bc3000000000011b410 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=0000000000000000 RBX=ffffffff85652d08 RCX=0000000000000000 RDX=ffff88800e4e51c0 RSI=ffffffff814c855d RDI=0000000000000005 RBP=0000000000000000 RSP=ffff888016d175e0 R8 =0000000000000005 R9 =0000000000000000 R10=0000000000000000 R11=00000000000b6a61 R12=0000000000000000 R13=0000000000000000 R14=ffffffff85652d08 R15=0000000000092cc0 RIP=ffffffff84511dc0 RFL=00000293 [--S-A-C] 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 00007fa4c7ad4900 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=00007ffd6d78b000 CR3=0000000019c84000 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=635f6e6f69737365733a4d41503d706f XMM01=6f6c5f6d61702c78756e696c65735f6d XMM02=61702c74696d7265705f6d61702c7469 XMM03=655f6d61702c7374696d696c5f6d6170 XMM04=3d6c616e696d72657420322e322e302e XMM05=3d656d616e74736f682022646873732f XMM06=746f6f72223d746363612078756e696c XMM07=6e655f6d61702c7374696d696c5f6d61 XMM08=652075253d64692073253d706f000000 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000