syzkaller login: [ 32.603867] BUG: Bad rss-counter state mm:000000004a1b8e6c type:MM_FILEPAGES val:33 [ 32.604505] BUG: Bad rss-counter state mm:000000004a1b8e6c type:MM_ANONPAGES val:22 [ 32.731852] ================================================================== [ 32.732506] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 32.733202] Read of size 8 at addr ffff88800e1b3798 by task sshd/220 [ 32.733748] [ 32.733896] CPU: 0 PID: 220 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 32.734521] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 32.735173] Call Trace: [ 32.735390] [ 32.735782] dump_stack_lvl+0x91/0xf0 [ 32.736184] print_report+0xcc/0x620 [ 32.736549] ? __virt_addr_valid+0x102/0x340 [ 32.736922] ? vma_interval_tree_remove+0xc75/0xec0 [ 32.737343] ? vma_interval_tree_remove+0xc75/0xec0 [ 32.737753] kasan_report+0xbe/0xf0 [ 32.738150] ? vma_interval_tree_remove+0xc75/0xec0 [ 32.738574] vma_interval_tree_remove+0xc75/0xec0 [ 32.739029] vma_prepare+0xc54/0x11a0 [ 32.739398] __split_vma+0x5af/0x950 [ 32.739715] ? __pfx___split_vma+0x10/0x10 [ 32.740069] ? find_held_lock+0x2c/0x110 [ 32.740416] do_vmi_align_munmap+0x2ba/0x11f0 [ 32.740807] ? lock_is_held_type+0x9f/0x120 [ 32.741173] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 32.741610] ? mtree_range_walk+0x632/0x900 [ 32.742063] ? mas_walk+0x5c7/0x7c0 [ 32.742377] do_vmi_munmap+0x1f1/0x2b0 [ 32.742699] mmap_region+0x1f9/0x2660 [ 32.743036] ? vm_mmap_pgoff+0x15c/0x3a0 [ 32.743378] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 32.743841] ? __pfx_lock_acquire+0x10/0x10 [ 32.744185] ? __pfx_mmap_region+0x10/0x10 [ 32.744512] ? security_mmap_addr+0x7d/0xa0 [ 32.744849] ? get_unmapped_area+0x1f5/0x3f0 [ 32.745194] do_mmap+0x854/0xf00 [ 32.745487] vm_mmap_pgoff+0x1a6/0x3a0 [ 32.745818] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 32.746246] ksys_mmap_pgoff+0x3af/0x500 [ 32.746587] do_syscall_64+0x3f/0x90 [ 32.746892] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 32.747322] RIP: 0033:0x7f4ba9b67d82 [ 32.747629] 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 [ 32.749044] RSP: 002b:00007ffc432c62a8 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 32.749649] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f4ba9b67d82 [ 32.750234] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f4ba8fa1000 [ 32.750805] RBP: 00007f4ba8fa1000 R08: 0000000000000009 R09: 0000000000001000 [ 32.751365] R10: 0000000000000812 R11: 0000000000000206 R12: 00005555d3b3cec0 [ 32.751911] R13: 00007ffc432c62c0 R14: 00007ffc432c62f0 R15: 00007ffc432c6650 [ 32.752474] [ 32.752669] [ 32.752812] Allocated by task 213: [ 32.753097] kasan_save_stack+0x22/0x50 [ 32.753450] kasan_set_track+0x25/0x30 [ 32.753788] __kasan_slab_alloc+0x59/0x70 [ 32.754188] kmem_cache_alloc+0x16b/0x370 [ 32.754532] vm_area_dup+0x20/0x160 [ 32.754828] __split_vma+0x170/0x950 [ 32.755138] split_vma+0xc6/0x110 [ 32.755424] mprotect_fixup+0x8d2/0xb30 [ 32.755750] do_mprotect_pkey+0x87e/0xd40 [ 32.756084] __x64_sys_mprotect+0x78/0xc0 [ 32.756430] do_syscall_64+0x3f/0x90 [ 32.756746] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 32.757181] [ 32.757319] Freed by task 13: [ 32.757580] kasan_save_stack+0x22/0x50 [ 32.757925] kasan_set_track+0x25/0x30 [ 32.758291] kasan_save_free_info+0x2b/0x50 [ 32.758648] __kasan_slab_free+0x10a/0x190 [ 32.758988] kmem_cache_free+0x10d/0x4d0 [ 32.759312] rcu_core+0x8c8/0x2860 [ 32.759605] __do_softirq+0x1b7/0x7d4 [ 32.759908] [ 32.760047] Last potentially related work creation: [ 32.760423] kasan_save_stack+0x22/0x50 [ 32.760744] __kasan_record_aux_stack+0x8e/0xa0 [ 32.761130] __call_rcu_common.constprop.0+0x6a/0xb90 [ 32.761560] remove_vma+0x139/0x170 [ 32.761859] do_vmi_align_munmap+0xd4a/0x11f0 [ 32.762256] do_vmi_munmap+0x1f1/0x2b0 [ 32.762581] __vm_munmap+0x138/0x3a0 [ 32.762889] __x64_sys_munmap+0x59/0x80 [ 32.763217] do_syscall_64+0x3f/0x90 [ 32.763520] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 32.763927] [ 32.764062] The buggy address belongs to the object at ffff88800e1b3740 [ 32.764062] which belongs to the cache vm_area_struct of size 168 [ 32.765003] The buggy address is located 88 bytes inside of [ 32.765003] freed 168-byte region [ffff88800e1b3740, ffff88800e1b37e8) [ 32.765914] [ 32.766111] The buggy address belongs to the physical page: [ 32.766556] page:000000008a1715f0 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xe1b3 [ 32.767271] memcg:ffff88800c521101 [ 32.767555] flags: 0x100000000000200(slab|node=0|zone=1) [ 32.767992] page_type: 0xffffffff() [ 32.768292] raw: 0100000000000200 ffff88800879fc80 ffffea000037e400 dead000000000006 [ 32.768879] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800c521101 [ 32.769446] page dumped because: kasan: bad access detected [ 32.769865] [ 32.770037] Memory state around the buggy address: [ 32.770413] ffff88800e1b3680: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 32.770950] ffff88800e1b3700: fc fc fc fc fc fc fc fc fa fb fb fb fb fb fb fb [ 32.771499] >ffff88800e1b3780: fb fb fb fb fb fb fb fb fb fb fb fb fb fc fc fc [ 32.772030] ^ [ 32.772347] ffff88800e1b3800: fc fc fc fc fc 00 00 00 00 00 00 00 00 00 00 00 [ 32.772896] ffff88800e1b3880: 00 00 00 00 00 00 00 00 00 00 fc fc fc fc fc fc [ 32.773459] ================================================================== [ 32.774519] Disabling lock debugging due to kernel taint [ 34.192323] BUG: Bad rss-counter state mm:0000000008f2c605 type:MM_FILEPAGES val:33 [ 34.193064] BUG: Bad rss-counter state mm:0000000008f2c605 type:MM_ANONPAGES val:22 [ 34.487360] BUG: Bad rss-counter state mm:0000000024ae5453 type:MM_FILEPAGES val:33 [ 34.488106] BUG: Bad rss-counter state mm:0000000024ae5453 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:58218' (ECDSA) to the list of known hosts. 2023/06/20 08:32:18 fuzzer started 2023/06/20 08:32:18 dialing manager at localhost:44161 2023/06/20 08:32:18 checking machine... 2023/06/20 08:32:18 checking revisions... [ 35.048365] kmemleak: Automatic memory scanning thread ended 2023/06/20 08:32:18 testing simple program... [ 35.082681] cgroup: Unknown subsys name 'net' [ 35.117336] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 08:32:17 Registers: info registers vcpu 0 RAX=ffff88806ce35000 RBX=0000000000000000 RCX=ffffffff8450c50e RDX=ffffed100d9c6a01 RSI=0000000000000004 RDI=ffffffff812889a5 RBP=dffffc0000000000 RSP=ffffffff85407e10 R8 =0000000000000000 R9 =ffffed100d9c6a00 R10=ffff88806ce35003 R11=0000000000000001 R12=ffffffff85d3bed0 R13=1ffffffff0a80fc7 R14=0000000000000000 R15=0000000000000000 RIP=ffffffff8450d49f 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=00007ffd8ac8fae8 CR3=0000000005482000 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=00007f95c3ac15100000555d8fa79790 XMM02=6f6974707972636e6561737268746977 XMM03=00000000000000000000000000777074 XMM04=40404040404040404040404040404040 XMM05=5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a XMM06=20202020202020202020202020202020 XMM07=ffffffffffff00ffffff00ffffff00ff XMM08=00002000000000202020002020200000 XMM09=ffffffffffff00ffffff00ffffff00ff XMM10=00002000000000202020002020200000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=0000000000000000 RBX=dffffc0000000000 RCX=0000000000000000 RDX=ffff888019f33680 RSI=ffffffff811fc4e2 RDI=ffff888019f33f90 RBP=ffff888019f33f90 RSP=ffff88801d14fe40 R8 =0000000000000001 R9 =0000000000000000 R10=0000000000000001 R11=00000000000b6996 R12=ffff888019f33ef8 R13=ffff888019f33680 R14=0000000000000001 R15=ffff88800ed6e500 RIP=ffffffff8452fca9 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 00007ff0746d4900 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=00007ffe41247000 CR3=0000000015b54000 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