syzkaller login: [ 31.573060] BUG: Bad rss-counter state mm:0000000028916fbd type:MM_FILEPAGES val:33 [ 31.574669] BUG: Bad rss-counter state mm:0000000028916fbd type:MM_ANONPAGES val:22 [ 31.667995] ================================================================== [ 31.669132] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 31.670295] Read of size 8 at addr ffff88801a248df0 by task sshd/221 [ 31.671403] [ 31.671661] CPU: 0 PID: 221 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 31.672176] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 31.672748] Call Trace: [ 31.672934] [ 31.673098] dump_stack_lvl+0x91/0xf0 [ 31.673389] print_report+0xcc/0x620 [ 31.673671] ? __virt_addr_valid+0x102/0x340 [ 31.673996] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.674351] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.674712] kasan_report+0xbe/0xf0 [ 31.674983] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.675340] vma_interval_tree_remove+0xc75/0xec0 [ 31.675691] vma_prepare+0xc54/0x11a0 [ 31.675968] __split_vma+0x5af/0x950 [ 31.676234] ? __pfx___split_vma+0x10/0x10 [ 31.676543] ? find_held_lock+0x2c/0x110 [ 31.676843] do_vmi_align_munmap+0x2ba/0x11f0 [ 31.677173] ? lock_is_held_type+0x9f/0x120 [ 31.677490] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 31.677840] ? mtree_range_walk+0x632/0x900 [ 31.678154] ? mas_walk+0x5c7/0x7c0 [ 31.678426] do_vmi_munmap+0x1f1/0x2b0 [ 31.678704] mmap_region+0x1f9/0x2660 [ 31.678982] ? vm_mmap_pgoff+0x15c/0x3a0 [ 31.679285] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 31.679702] ? __pfx_lock_acquire+0x10/0x10 [ 31.680017] ? __pfx_mmap_region+0x10/0x10 [ 31.680328] ? security_mmap_addr+0x7d/0xa0 [ 31.680637] ? get_unmapped_area+0x1f5/0x3f0 [ 31.680963] do_mmap+0x854/0xf00 [ 31.681224] vm_mmap_pgoff+0x1a6/0x3a0 [ 31.681511] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 31.681830] ksys_mmap_pgoff+0x3af/0x500 [ 31.682118] do_syscall_64+0x3f/0x90 [ 31.682394] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.682767] RIP: 0033:0x7f6df45b4d82 [ 31.683027] 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 [ 31.684276] RSP: 002b:00007ffe8ca13058 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 31.684802] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f6df45b4d82 [ 31.685296] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f6df39ee000 [ 31.685787] RBP: 00007f6df39ee000 R08: 0000000000000009 R09: 0000000000001000 [ 31.686279] R10: 0000000000000812 R11: 0000000000000206 R12: 000055aea26c6ec0 [ 31.686770] R13: 00007ffe8ca13070 R14: 00007ffe8ca130a0 R15: 00007ffe8ca13400 [ 31.687282] [ 31.687454] [ 31.687576] Allocated by task 214: [ 31.687828] kasan_save_stack+0x22/0x50 [ 31.688114] kasan_set_track+0x25/0x30 [ 31.688406] __kasan_slab_alloc+0x59/0x70 [ 31.688708] kmem_cache_alloc+0x16b/0x370 [ 31.688998] vm_area_dup+0x20/0x160 [ 31.689272] __split_vma+0x170/0x950 [ 31.689538] split_vma+0xc6/0x110 [ 31.689789] mprotect_fixup+0x8d2/0xb30 [ 31.690069] do_mprotect_pkey+0x87e/0xd40 [ 31.690371] __x64_sys_mprotect+0x78/0xc0 [ 31.690671] do_syscall_64+0x3f/0x90 [ 31.690950] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.691321] [ 31.691445] Freed by task 204: [ 31.691670] kasan_save_stack+0x22/0x50 [ 31.691954] kasan_set_track+0x25/0x30 [ 31.692235] kasan_save_free_info+0x2b/0x50 [ 31.692539] __kasan_slab_free+0x10a/0x190 [ 31.692842] kmem_cache_free+0x10d/0x4d0 [ 31.693141] rcu_core+0x8c8/0x2860 [ 31.693404] __do_softirq+0x1b7/0x7d4 [ 31.693677] [ 31.693796] Last potentially related work creation: [ 31.694145] kasan_save_stack+0x22/0x50 [ 31.694432] __kasan_record_aux_stack+0x8e/0xa0 [ 31.694768] __call_rcu_common.constprop.0+0x6a/0xb90 [ 31.695138] remove_vma+0x139/0x170 [ 31.695408] do_vmi_align_munmap+0xd4a/0x11f0 [ 31.695729] do_vmi_munmap+0x1f1/0x2b0 [ 31.696004] __vm_munmap+0x138/0x3a0 [ 31.696272] __x64_sys_munmap+0x59/0x80 [ 31.696563] do_syscall_64+0x3f/0x90 [ 31.696836] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.697221] [ 31.697344] The buggy address belongs to the object at ffff88801a248d98 [ 31.697344] which belongs to the cache vm_area_struct of size 168 [ 31.698208] The buggy address is located 88 bytes inside of [ 31.698208] freed 168-byte region [ffff88801a248d98, ffff88801a248e40) [ 31.699023] [ 31.699143] The buggy address belongs to the physical page: [ 31.699530] page:000000000f6cd51a refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x1a248 [ 31.700162] memcg:ffff88800e22c701 [ 31.700408] flags: 0x100000000000200(slab|node=0|zone=1) [ 31.700789] page_type: 0xffffffff() [ 31.701043] raw: 0100000000000200 ffff88800879fc80 dead000000000122 0000000000000000 [ 31.701573] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800e22c701 [ 31.702101] page dumped because: kasan: bad access detected [ 31.702484] [ 31.702610] Memory state around the buggy address: [ 31.702941] ffff88801a248c80: fc fc fc fc fc fc 00 00 00 00 00 00 00 00 00 00 [ 31.703441] ffff88801a248d00: 00 00 00 00 00 00 00 00 00 00 00 fc fc fc fc fc [ 31.703937] >ffff88801a248d80: fc fc fc fa fb fb fb fb fb fb fb fb fb fb fb fb [ 31.704420] ^ [ 31.704886] ffff88801a248e00: fb fb fb fb fb fb fb fb fc fc fc fc fc fc fc fc [ 31.705386] ffff88801a248e80: fa fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 31.705882] ================================================================== [ 31.706519] Disabling lock debugging due to kernel taint [ 32.848363] BUG: Bad rss-counter state mm:000000005ff7ff0a type:MM_FILEPAGES val:33 [ 32.849099] BUG: Bad rss-counter state mm:000000005ff7ff0a type:MM_ANONPAGES val:22 [ 33.176766] BUG: Bad rss-counter state mm:00000000551c0a57 type:MM_FILEPAGES val:33 [ 33.177336] BUG: Bad rss-counter state mm:00000000551c0a57 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:38894' (ECDSA) to the list of known hosts. 2023/06/19 23:28:54 fuzzer started 2023/06/19 23:28:54 dialing manager at localhost:44161 2023/06/19 23:28:54 checking machine... 2023/06/19 23:28:54 checking revisions... [ 33.806279] kmemleak: Automatic memory scanning thread ended 2023/06/19 23:28:55 testing simple program... [ 33.853560] cgroup: Unknown subsys name 'net' [ 33.915959] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 23:28:53 Registers: info registers vcpu 0 RAX=000056513dcf1800 RBX=0000000000000000 RCX=0000000000000000 RDX=0000000000000000 RSI=ffffffff8121f918 RDI=ffffffff85d3bed0 RBP=ffff888008df2720 RSP=ffff888016767ee0 R8 =0000000000000000 R9 =fffffbfff0ba77da R10=ffffffff85d3bed7 R11=00000000000b6996 R12=ffffffff854ee9e0 R13=0000000000000000 R14=0000000000000000 R15=0000000000000001 RIP=ffffffff844fbf43 RFL=00040206 [-----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 00007ff9dc44d900 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=00007ff9dc819328 CR3=000000000e44a000 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=652022746f6f72223d74636361207469 XMM02=3d6c616e696d72657420322e322e302e XMM03=3d656d616e74736f682022646873732f XMM04=40404040404040404040404040404040 XMM05=5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a XMM06=20202020202020202020202020202020 XMM07=00000000000000000000000000000000 XMM08=652075253d64692073253d706f000000 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=ffff88806cf35000 RBX=0000000000000001 RCX=ffffffff8450c50e RDX=ffffed100d9e6a01 RSI=0000000000000004 RDI=ffffffff812889a5 RBP=dffffc0000000000 RSP=ffff888008e27e70 R8 =0000000000000000 R9 =ffffed100d9e6a00 R10=ffff88806cf35003 R11=0000000000000001 R12=ffffffff85d3bed0 R13=1ffff110011c4fd3 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 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=00007feb3ed88130 CR3=000000000f23a000 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=2984b6a3d431168f284634c28ccb81b5 XMM02=000000000011d9d0eff9b2d0a8fce9cb XMM03=000000000011daa02c67c8bc2e329bc3 XMM04=079644da5514f38a00000000000ae988 XMM05=e4cb8bb95a7664b60000000000134458 XMM06=be869f63006707ed00000000001332a0 XMM07=e042d86d42eb936e0000000000124aa0 XMM08=c614e8522df5159c000000000011daa0 XMM09=00000000000000000000000000000000 XMM10=20200000000020202020202020200000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000