syzkaller login: [ 31.537662] BUG: Bad rss-counter state mm:000000009014971d type:MM_FILEPAGES val:33 [ 31.539655] BUG: Bad rss-counter state mm:000000009014971d type:MM_ANONPAGES val:22 [ 31.694999] ================================================================== [ 31.695957] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 31.696892] Read of size 8 at addr ffff888016aa84e0 by task sshd/222 [ 31.697660] [ 31.697875] CPU: 1 PID: 222 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 31.698821] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 31.699821] Call Trace: [ 31.700145] [ 31.700428] dump_stack_lvl+0x91/0xf0 [ 31.700926] print_report+0xcc/0x620 [ 31.701426] ? __virt_addr_valid+0x102/0x340 [ 31.702029] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.702702] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.703332] kasan_report+0xbe/0xf0 [ 31.703838] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.704468] vma_interval_tree_remove+0xc75/0xec0 [ 31.705079] vma_prepare+0xc54/0x11a0 [ 31.705560] __split_vma+0x5af/0x950 [ 31.706043] ? __pfx___split_vma+0x10/0x10 [ 31.706627] ? find_held_lock+0x2c/0x110 [ 31.707193] do_vmi_align_munmap+0x2ba/0x11f0 [ 31.707813] ? lock_is_held_type+0x9f/0x120 [ 31.708429] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 31.709066] ? mtree_range_walk+0x632/0x900 [ 31.709630] ? mas_walk+0x5c7/0x7c0 [ 31.710106] do_vmi_munmap+0x1f1/0x2b0 [ 31.710659] mmap_region+0x1f9/0x2660 [ 31.711151] ? vm_mmap_pgoff+0x15c/0x3a0 [ 31.711718] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 31.712516] ? __pfx_lock_acquire+0x10/0x10 [ 31.713115] ? __pfx_mmap_region+0x10/0x10 [ 31.713658] ? security_mmap_addr+0x7d/0xa0 [ 31.714184] ? get_unmapped_area+0x1f5/0x3f0 [ 31.714744] do_mmap+0x854/0xf00 [ 31.715184] vm_mmap_pgoff+0x1a6/0x3a0 [ 31.715718] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 31.716338] ksys_mmap_pgoff+0x3af/0x500 [ 31.716861] do_syscall_64+0x3f/0x90 [ 31.717337] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.717997] RIP: 0033:0x7f8bab8f7d82 [ 31.718453] 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 [ 31.720583] RSP: 002b:00007ffe9704c9d8 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 31.721502] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f8bab8f7d82 [ 31.722359] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f8baad31000 [ 31.723220] RBP: 00007f8baad31000 R08: 0000000000000009 R09: 0000000000001000 [ 31.724096] R10: 0000000000000812 R11: 0000000000000206 R12: 000055814286aec0 [ 31.724934] R13: 00007ffe9704c9f0 R14: 00007ffe9704ca20 R15: 00007ffe9704cd80 [ 31.725784] [ 31.726078] [ 31.726292] Allocated by task 215: [ 31.726717] kasan_save_stack+0x22/0x50 [ 31.727222] kasan_set_track+0x25/0x30 [ 31.727727] __kasan_slab_alloc+0x59/0x70 [ 31.728247] kmem_cache_alloc+0x16b/0x370 [ 31.728765] vm_area_dup+0x20/0x160 [ 31.729214] __split_vma+0x170/0x950 [ 31.729679] split_vma+0xc6/0x110 [ 31.730122] mprotect_fixup+0x8d2/0xb30 [ 31.730620] do_mprotect_pkey+0x87e/0xd40 [ 31.731143] __x64_sys_mprotect+0x78/0xc0 [ 31.731677] do_syscall_64+0x3f/0x90 [ 31.732155] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.732793] [ 31.733012] Freed by task 215: [ 31.733406] kasan_save_stack+0x22/0x50 [ 31.733905] kasan_set_track+0x25/0x30 [ 31.734400] kasan_save_free_info+0x2b/0x50 [ 31.734940] __kasan_slab_free+0x10a/0x190 [ 31.735487] kmem_cache_free+0x10d/0x4d0 [ 31.736004] rcu_core+0x8c8/0x2860 [ 31.736449] __do_softirq+0x1b7/0x7d4 [ 31.736925] [ 31.737144] Last potentially related work creation: [ 31.737726] kasan_save_stack+0x22/0x50 [ 31.738225] __kasan_record_aux_stack+0x8e/0xa0 [ 31.738797] __call_rcu_common.constprop.0+0x6a/0xb90 [ 31.739445] remove_vma+0x139/0x170 [ 31.739903] do_vmi_align_munmap+0xd4a/0x11f0 [ 31.740455] do_vmi_munmap+0x1f1/0x2b0 [ 31.740946] __vm_munmap+0x138/0x3a0 [ 31.741415] __x64_sys_munmap+0x59/0x80 [ 31.741915] do_syscall_64+0x3f/0x90 [ 31.742385] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.743031] [ 31.743247] The buggy address belongs to the object at ffff888016aa8488 [ 31.743247] which belongs to the cache vm_area_struct of size 168 [ 31.744717] The buggy address is located 88 bytes inside of [ 31.744717] freed 168-byte region [ffff888016aa8488, ffff888016aa8530) [ 31.746143] [ 31.746395] The buggy address belongs to the physical page: [ 31.747094] page:000000001509519c refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x16aa8 [ 31.748333] memcg:ffff88800d94da01 [ 31.748859] flags: 0x100000000000200(slab|node=0|zone=1) [ 31.749534] page_type: 0xffffffff() [ 31.749985] raw: 0100000000000200 ffff8880087a0c80 dead000000000122 0000000000000000 [ 31.750902] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800d94da01 [ 31.751818] page dumped because: kasan: bad access detected [ 31.752478] [ 31.752694] Memory state around the buggy address: [ 31.753276] ffff888016aa8380: fc fc fc fc 00 00 00 00 00 00 00 00 00 00 00 00 [ 31.754132] ffff888016aa8400: 00 00 00 00 00 00 00 00 00 fc fc fc fc fc fc fc [ 31.754986] >ffff888016aa8480: fc fa fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 31.755866] ^ [ 31.756781] ffff888016aa8500: fb fb fb fb fb fb fc fc fc fc fc fc fc fc fa fb [ 31.757738] ffff888016aa8580: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 31.758765] ================================================================== [ 31.760496] Disabling lock debugging due to kernel taint [ 33.672620] BUG: Bad rss-counter state mm:000000004bbe0624 type:MM_FILEPAGES val:33 [ 33.673649] BUG: Bad rss-counter state mm:000000004bbe0624 type:MM_ANONPAGES val:22 [ 34.242694] BUG: Bad rss-counter state mm:000000001b62bd45 type:MM_FILEPAGES val:33 [ 34.243883] BUG: Bad rss-counter state mm:000000001b62bd45 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:38119' (ECDSA) to the list of known hosts. 2023/06/20 12:24:55 fuzzer started 2023/06/20 12:24:56 dialing manager at localhost:36067 2023/06/20 12:24:56 checking machine... 2023/06/20 12:24:56 checking revisions... [ 34.920946] kmemleak: Automatic memory scanning thread ended 2023/06/20 12:24:56 testing simple program... [ 34.972038] cgroup: Unknown subsys name 'net' [ 35.021824] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 12:24:55 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=00007ffd30ddf918 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=00007f0230ffb5100000559f3bff2790 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=ffff88800d9aaa80 RBX=0000000000400cc0 RCX=ffffffff812d86ea RDX=0000000000000148 RSI=0000000000400cc0 RDI=ffff88800d9aaa80 RBP=ffff888014737710 RSP=ffff8880147376b8 R8 =0000000000000000 R9 =fffffbfff0ba7a6a R10=0000000000000000 R11=0000000000000001 R12=ffff888008fae000 R13=ffff88800d9aaa80 R14=0000000000400cc0 R15=ffffffff8366a63c RIP=ffffffff8183a2b4 RFL=00000206 [-----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 00007f07c3e8e900 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=00007f07c331ee80 CR3=000000000d7ea000 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=756f6a2f646d65747379732f6e75722f XMM01=00676f6c7379732f6c616e72756f6a2f XMM02=756f6a2f646d65747379732f6e75722f XMM03=006c616e72756f6a2f646d6574737973 XMM04=ddf86c6c2a8df8c800000000000ae988 XMM05=347da999467e11e50000000000132338 XMM06=00c3ffa147b8d8570000000000131128 XMM07=fb795ef6d657705600000000001213c0 XMM08=4f5453444600273d67736d000d0a0920 XMM09=00000000000000000000000000000000 XMM10=20200000000020202020202020200000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000