syzkaller login: [ 29.988981] BUG: Bad rss-counter state mm:0000000056c95aea type:MM_FILEPAGES val:33 [ 29.990245] BUG: Bad rss-counter state mm:0000000056c95aea type:MM_ANONPAGES val:22 [ 30.157513] ================================================================== [ 30.158605] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 30.159770] Read of size 8 at addr ffff88801a3534e0 by task sshd/221 [ 30.160821] [ 30.161048] CPU: 1 PID: 221 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 30.161923] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 30.162925] Call Trace: [ 30.163254] [ 30.163538] dump_stack_lvl+0x91/0xf0 [ 30.164031] print_report+0xcc/0x620 [ 30.164520] ? __virt_addr_valid+0x102/0x340 [ 30.165076] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.165695] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.166319] kasan_report+0xbe/0xf0 [ 30.166807] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.167439] vma_interval_tree_remove+0xc75/0xec0 [ 30.168045] vma_prepare+0xc54/0x11a0 [ 30.168527] __split_vma+0x5af/0x950 [ 30.169001] ? __pfx___split_vma+0x10/0x10 [ 30.169540] ? find_held_lock+0x2c/0x110 [ 30.170064] do_vmi_align_munmap+0x2ba/0x11f0 [ 30.170633] ? lock_is_held_type+0x9f/0x120 [ 30.171170] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 30.171800] ? mtree_range_walk+0x632/0x900 [ 30.172354] ? mas_walk+0x5c7/0x7c0 [ 30.172840] do_vmi_munmap+0x1f1/0x2b0 [ 30.173342] mmap_region+0x1f9/0x2660 [ 30.173838] ? vm_mmap_pgoff+0x15c/0x3a0 [ 30.174355] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 30.175072] ? __pfx_lock_acquire+0x10/0x10 [ 30.175618] ? __pfx_mmap_region+0x10/0x10 [ 30.176151] ? security_mmap_addr+0x7d/0xa0 [ 30.176696] ? get_unmapped_area+0x1f5/0x3f0 [ 30.177251] do_mmap+0x854/0xf00 [ 30.177696] vm_mmap_pgoff+0x1a6/0x3a0 [ 30.178195] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 30.178773] ksys_mmap_pgoff+0x3af/0x500 [ 30.179287] do_syscall_64+0x3f/0x90 [ 30.179773] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.180419] RIP: 0033:0x7fcbb324cd82 [ 30.180884] 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 [ 30.183024] RSP: 002b:00007fffd86bb1e8 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 30.183956] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007fcbb324cd82 [ 30.184830] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007fcbb2686000 [ 30.185684] RBP: 00007fcbb2686000 R08: 0000000000000009 R09: 0000000000001000 [ 30.186534] R10: 0000000000000812 R11: 0000000000000206 R12: 0000560c260d0b20 [ 30.187387] R13: 00007fffd86bb200 R14: 00007fffd86bb230 R15: 00007fffd86bb590 [ 30.188258] [ 30.188566] [ 30.188788] Allocated by task 214: [ 30.189225] kasan_save_stack+0x22/0x50 [ 30.189736] kasan_set_track+0x25/0x30 [ 30.190234] __kasan_slab_alloc+0x59/0x70 [ 30.190762] kmem_cache_alloc+0x16b/0x370 [ 30.191293] vm_area_dup+0x20/0x160 [ 30.191753] __split_vma+0x170/0x950 [ 30.192222] split_vma+0xc6/0x110 [ 30.192680] mprotect_fixup+0x8d2/0xb30 [ 30.193187] do_mprotect_pkey+0x87e/0xd40 [ 30.193720] __x64_sys_mprotect+0x78/0xc0 [ 30.194242] do_syscall_64+0x3f/0x90 [ 30.194729] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.195392] [ 30.195606] Freed by task 214: [ 30.196003] kasan_save_stack+0x22/0x50 [ 30.196509] kasan_set_track+0x25/0x30 [ 30.197008] kasan_save_free_info+0x2b/0x50 [ 30.197551] __kasan_slab_free+0x10a/0x190 [ 30.198085] kmem_cache_free+0x10d/0x4d0 [ 30.198601] rcu_core+0x8c8/0x2860 [ 30.199046] __do_softirq+0x1b7/0x7d4 [ 30.199539] [ 30.199759] Last potentially related work creation: [ 30.200338] kasan_save_stack+0x22/0x50 [ 30.200845] __kasan_record_aux_stack+0x8e/0xa0 [ 30.201422] __call_rcu_common.constprop.0+0x6a/0xb90 [ 30.202161] remove_vma+0x139/0x170 [ 30.202620] do_vmi_align_munmap+0xd4a/0x11f0 [ 30.203179] do_vmi_munmap+0x1f1/0x2b0 [ 30.203684] __vm_munmap+0x138/0x3a0 [ 30.204152] __x64_sys_munmap+0x59/0x80 [ 30.204653] do_syscall_64+0x3f/0x90 [ 30.205134] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.205794] [ 30.206008] The buggy address belongs to the object at ffff88801a353488 [ 30.206008] which belongs to the cache vm_area_struct of size 168 [ 30.207491] The buggy address is located 88 bytes inside of [ 30.207491] freed 168-byte region [ffff88801a353488, ffff88801a353530) [ 30.208896] [ 30.209111] The buggy address belongs to the physical page: [ 30.209777] page:00000000a2b96e2a refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x1a353 [ 30.210869] memcg:ffff88800f031a01 [ 30.211313] flags: 0x100000000000200(slab|node=0|zone=1) [ 30.211975] page_type: 0xffffffff() [ 30.212432] raw: 0100000000000200 ffff8880087a0c80 dead000000000122 0000000000000000 [ 30.213352] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800f031a01 [ 30.214279] page dumped because: kasan: bad access detected [ 30.214964] [ 30.215181] Memory state around the buggy address: [ 30.215775] ffff88801a353380: fc fc fc fc 00 00 00 00 00 00 00 00 00 00 00 00 [ 30.216642] ffff88801a353400: 00 00 00 00 00 00 00 00 00 fc fc fc fc fc fc fc [ 30.217505] >ffff88801a353480: fc fa fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 30.218375] ^ [ 30.219155] ffff88801a353500: fb fb fb fb fb fb fc fc fc fc fc fc fc fc fa fb [ 30.220055] ffff88801a353580: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 30.220914] ================================================================== [ 30.221843] Disabling lock debugging due to kernel taint [ 32.662982] BUG: Bad rss-counter state mm:00000000e893e577 type:MM_FILEPAGES val:33 [ 32.664163] BUG: Bad rss-counter state mm:00000000e893e577 type:MM_ANONPAGES val:22 [ 33.043624] BUG: Bad rss-counter state mm:000000003ccd243e type:MM_FILEPAGES val:33 [ 33.044631] BUG: Bad rss-counter state mm:000000003ccd243e type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:47823' (ECDSA) to the list of known hosts. 2023/06/20 15:22:30 fuzzer started 2023/06/20 15:22:31 dialing manager at localhost:36067 2023/06/20 15:22:31 checking machine... 2023/06/20 15:22:31 checking revisions... [ 33.791059] kmemleak: Automatic memory scanning thread ended 2023/06/20 15:22:31 testing simple program... [ 33.835018] cgroup: Unknown subsys name 'net' [ 33.882926] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 15:22:30 Registers: info registers vcpu 0 RAX=0000000000000004 RBX=00000000a84b4739 RCX=ffff88806c9a39c8 RDX=000000000000000e RSI=ffffffff8184725c RDI=00000000f66c67f9 RBP=ffff88800d8fb0b0 RSP=ffff888019d0f958 R8 =0000000015957d52 R9 =fffffbfff0ba7a6a R10=ffffffff85d3d357 R11=00000000000b6a61 R12=0000000000000001 R13=0000000000092cc0 R14=ffff888019d0f9c0 R15=000000000000000e RIP=ffffffff82270502 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 00007f66f20c0900 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=00007ffd37f1c000 CR3=0000000016e08000 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=ffffffffffffffffffff000000000000 XMM01=000000000000003635006b6f6c6c756e XMM02=62003d73646e756f7200323135616873 XMM03=5320444f4854454d5f54505952434e45 XMM04=40404040404040404040404040404040 XMM05=5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a XMM06=20202020202020202020202020202020 XMM07=00000000000000000000000000000000 XMM08=00000000000000000000000000202020 XMM09=ff0000ffffffffffff00000000ffffff XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=ffffc90000660000 RBX=ffff88800f460b80 RCX=1ffff11001e8c245 RDX=1ffff11001e8c1b6 RSI=0000000000000004 RDI=ffff88800f461228 RBP=1ffff11001eb0f76 RSP=ffff88800f587b38 R8 =0000000000000001 R9 =ffffed1001eb0f55 R10=0000000000000003 R11=0000000000000000 R12=ffff88800f460d98 R13=0000000000003d71 R14=ffff88800f460000 R15=ffff88800f460b80 RIP=ffffffff8302b719 RFL=00000006 [-----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 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=00007fd358844910 CR3=000000000db5c000 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=6ad9a9686b2855a5194128730ae15ba2 XMM02=000000000011a7a0eff9b2d0a8fce9cb XMM03=000000000011a8702c67c8bc2e329bc3 XMM04=f6c8d475dfc1dab600000000000ae988 XMM05=0fc957faa395cb0a0000000000132c60 XMM06=c291bd5c70af25b90000000000131a50 XMM07=fb795ef6d65770560000000000121d88 XMM08=2c67c8bc2e329bc3000000000011a810 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000