syzkaller login: [ 33.686727] BUG: Bad rss-counter state mm:00000000f17613b7 type:MM_FILEPAGES val:33 [ 33.688185] BUG: Bad rss-counter state mm:00000000f17613b7 type:MM_ANONPAGES val:22 [ 33.843822] ================================================================== [ 33.844717] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 33.845647] Read of size 8 at addr ffff888015d606b0 by task sshd/220 [ 33.846417] [ 33.846635] CPU: 1 PID: 220 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 33.847628] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 33.848593] Call Trace: [ 33.848913] [ 33.849194] dump_stack_lvl+0x91/0xf0 [ 33.849695] print_report+0xcc/0x620 [ 33.850178] ? __virt_addr_valid+0x102/0x340 [ 33.850736] ? vma_interval_tree_remove+0xc75/0xec0 [ 33.851379] ? vma_interval_tree_remove+0xc75/0xec0 [ 33.851988] kasan_report+0xbe/0xf0 [ 33.852460] ? vma_interval_tree_remove+0xc75/0xec0 [ 33.853079] vma_interval_tree_remove+0xc75/0xec0 [ 33.853683] vma_prepare+0xc54/0x11a0 [ 33.854156] __split_vma+0x5af/0x950 [ 33.854621] ? __pfx___split_vma+0x10/0x10 [ 33.855159] ? find_held_lock+0x2c/0x110 [ 33.855679] do_vmi_align_munmap+0x2ba/0x11f0 [ 33.856240] ? lock_is_held_type+0x9f/0x120 [ 33.856773] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 33.857384] ? mtree_range_walk+0x632/0x900 [ 33.857937] ? mas_walk+0x5c7/0x7c0 [ 33.858407] do_vmi_munmap+0x1f1/0x2b0 [ 33.858894] mmap_region+0x1f9/0x2660 [ 33.859390] ? vm_mmap_pgoff+0x15c/0x3a0 [ 33.859896] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 33.860602] ? __pfx_lock_acquire+0x10/0x10 [ 33.861135] ? __pfx_mmap_region+0x10/0x10 [ 33.861659] ? security_mmap_addr+0x7d/0xa0 [ 33.862195] ? get_unmapped_area+0x1f5/0x3f0 [ 33.862748] do_mmap+0x854/0xf00 [ 33.863202] vm_mmap_pgoff+0x1a6/0x3a0 [ 33.863702] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 33.864257] ksys_mmap_pgoff+0x3af/0x500 [ 33.864762] do_syscall_64+0x3f/0x90 [ 33.865238] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 33.865884] RIP: 0033:0x7feba5d21d82 [ 33.866340] 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 [ 33.868465] RSP: 002b:00007ffe27b58768 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 33.869369] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007feba5d21d82 [ 33.870211] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007feba515b000 [ 33.871075] RBP: 00007feba515b000 R08: 0000000000000009 R09: 0000000000001000 [ 33.871916] R10: 0000000000000812 R11: 0000000000000206 R12: 000056102c202f70 [ 33.872757] R13: 00007ffe27b58780 R14: 00007ffe27b587b0 R15: 00007ffe27b58b10 [ 33.873613] [ 33.873905] [ 33.874119] Allocated by task 213: [ 33.874549] kasan_save_stack+0x22/0x50 [ 33.875056] kasan_set_track+0x25/0x30 [ 33.875549] __kasan_slab_alloc+0x59/0x70 [ 33.876071] kmem_cache_alloc+0x16b/0x370 [ 33.876587] vm_area_dup+0x20/0x160 [ 33.877038] __split_vma+0x170/0x950 [ 33.877502] split_vma+0xc6/0x110 [ 33.877940] mprotect_fixup+0x8d2/0xb30 [ 33.878439] do_mprotect_pkey+0x87e/0xd40 [ 33.878963] __x64_sys_mprotect+0x78/0xc0 [ 33.879478] do_syscall_64+0x3f/0x90 [ 33.879945] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 33.880575] [ 33.880787] Freed by task 213: [ 33.881176] kasan_save_stack+0x22/0x50 [ 33.881673] kasan_set_track+0x25/0x30 [ 33.882160] kasan_save_free_info+0x2b/0x50 [ 33.882687] __kasan_slab_free+0x10a/0x190 [ 33.883233] kmem_cache_free+0x10d/0x4d0 [ 33.883737] rcu_core+0x8c8/0x2860 [ 33.884173] __do_softirq+0x1b7/0x7d4 [ 33.884644] [ 33.884859] Last potentially related work creation: [ 33.885439] kasan_save_stack+0x22/0x50 [ 33.885940] __kasan_record_aux_stack+0x8e/0xa0 [ 33.886511] __call_rcu_common.constprop.0+0x6a/0xb90 [ 33.887154] remove_vma+0x139/0x170 [ 33.887606] do_vmi_align_munmap+0xd4a/0x11f0 [ 33.888159] do_vmi_munmap+0x1f1/0x2b0 [ 33.888687] __vm_munmap+0x138/0x3a0 [ 33.889185] __x64_sys_munmap+0x59/0x80 [ 33.889674] do_syscall_64+0x3f/0x90 [ 33.890144] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 33.890773] [ 33.891008] The buggy address belongs to the object at ffff888015d60658 [ 33.891008] which belongs to the cache vm_area_struct of size 168 [ 33.892463] The buggy address is located 88 bytes inside of [ 33.892463] freed 168-byte region [ffff888015d60658, ffff888015d60700) [ 33.893859] [ 33.894071] The buggy address belongs to the physical page: [ 33.894726] page:0000000049120413 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x15d60 [ 33.895824] memcg:ffff88800e925801 [ 33.896246] flags: 0x100000000000200(slab|node=0|zone=1) [ 33.896890] page_type: 0xffffffff() [ 33.897337] raw: 0100000000000200 ffff88800879fc80 dead000000000122 0000000000000000 [ 33.898246] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800e925801 [ 33.899162] page dumped because: kasan: bad access detected [ 33.899833] [ 33.900046] Memory state around the buggy address: [ 33.900635] ffff888015d60580: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 33.901506] ffff888015d60600: 00 00 00 fc fc fc fc fc fc fc fc fa fb fb fb fb [ 33.902373] >ffff888015d60680: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 33.903247] ^ [ 33.903833] ffff888015d60700: fc fc fc fc fc fc fc fc fa fb fb fb fb fb fb fb [ 33.904685] ffff888015d60780: fb fb fb fb fb fb fb fb fb fb fb fb fb fc fc fc [ 33.905539] ================================================================== [ 33.906465] Disabling lock debugging due to kernel taint [ 35.725535] BUG: Bad rss-counter state mm:00000000445ade8d type:MM_FILEPAGES val:33 [ 35.726801] BUG: Bad rss-counter state mm:00000000445ade8d type:MM_ANONPAGES val:22 [ 36.212319] BUG: Bad rss-counter state mm:00000000c6c418ae type:MM_FILEPAGES val:33 [ 36.213629] BUG: Bad rss-counter state mm:00000000c6c418ae type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:60577' (ECDSA) to the list of known hosts. 2023/06/20 03:55:03 fuzzer started 2023/06/20 03:55:04 dialing manager at localhost:44161 2023/06/20 03:55:04 checking machine... 2023/06/20 03:55:04 checking revisions... [ 36.942375] kmemleak: Automatic memory scanning thread ended 2023/06/20 03:55:04 testing simple program... [ 36.998030] cgroup: Unknown subsys name 'net' [ 37.050059] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 03:55:00 Registers: info registers vcpu 0 RAX=dffffc0000000000 RBX=0000000000000001 RCX=ffffffff818acea2 RDX=0000000000008ace RSI=0000000000008ace RDI=ffffffff8650a6f8 RBP=ffff88800d967530 RSP=ffff88800d967468 R8 =0000000000000000 R9 =ffff88800d967518 R10=0000000000038001 R11=00000000000234ab R12=ffff88800d967538 R13=ffff88800d967520 R14=ffff88800d967519 R15=ffff88800d9674d8 RIP=ffffffff8113077a 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 00007ff7f337b900 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=00007ff7f277cde0 CR3=000000000cacc000 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=756f6a2f646d65747379732f6e75722f XMM01=00676f6c7379732f6c616e72756f6a2f XMM02=756f6a2f646d65747379732f6e75722f XMM03=006c616e72756f6a2f646d6574737973 XMM04=d1995014cae5cebf00000000000ae988 XMM05=898f5389240791420000000000134c30 XMM06=4fda316b135da52b0000000000133a20 XMM07=fb795ef6d65770560000000000123fa0 XMM08=4f5453444600273d67736d000d0a0920 XMM09=00000000000000000000000000000000 XMM10=20200000000020202020202020200000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=dffffc0000000000 RBX=0000000000000001 RCX=ffffffff86096756 RDX=0000000000000008 RSI=ffff888008e57928 RDI=ffff888008e57958 RBP=ffff888008e579b0 RSP=ffff888008e57888 R8 =0000000000000001 R9 =ffff888008e57998 R10=0000000000038001 R11=0000000000006097 R12=ffff888008e579b8 R13=ffff888008e579a0 R14=ffff888008e57928 R15=ffff888008e57958 RIP=ffffffff811303fc RFL=00000287 [--S--PC] 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 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=00007fb3c1871618 CR3=000000001959c000 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=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