syzkaller login: [ 30.390687] BUG: Bad rss-counter state mm:00000000ddbc4727 type:MM_FILEPAGES val:33 [ 30.392630] BUG: Bad rss-counter state mm:00000000ddbc4727 type:MM_ANONPAGES val:22 [ 30.558363] ================================================================== [ 30.559387] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 30.560462] Read of size 8 at addr ffff888016b8a968 by task sshd/220 [ 30.561238] [ 30.561457] CPU: 1 PID: 220 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 30.562340] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 30.563325] Call Trace: [ 30.563645] [ 30.563930] dump_stack_lvl+0x91/0xf0 [ 30.564418] print_report+0xcc/0x620 [ 30.564904] ? __virt_addr_valid+0x102/0x340 [ 30.565460] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.566107] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.566724] kasan_report+0xbe/0xf0 [ 30.567201] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.567833] vma_interval_tree_remove+0xc75/0xec0 [ 30.568452] vma_prepare+0xc54/0x11a0 [ 30.568932] __split_vma+0x5af/0x950 [ 30.569403] ? __pfx___split_vma+0x10/0x10 [ 30.569933] ? find_held_lock+0x2c/0x110 [ 30.570467] do_vmi_align_munmap+0x2ba/0x11f0 [ 30.571037] ? lock_is_held_type+0x9f/0x120 [ 30.571585] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 30.572188] ? mtree_range_walk+0x632/0x900 [ 30.572739] ? mas_walk+0x5c7/0x7c0 [ 30.573217] do_vmi_munmap+0x1f1/0x2b0 [ 30.573711] mmap_region+0x1f9/0x2660 [ 30.574215] ? vm_mmap_pgoff+0x15c/0x3a0 [ 30.574734] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 30.575458] ? __pfx_lock_acquire+0x10/0x10 [ 30.575998] ? __pfx_mmap_region+0x10/0x10 [ 30.576531] ? security_mmap_addr+0x7d/0xa0 [ 30.577062] ? get_unmapped_area+0x1f5/0x3f0 [ 30.577621] do_mmap+0x854/0xf00 [ 30.578061] vm_mmap_pgoff+0x1a6/0x3a0 [ 30.578584] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 30.579147] ksys_mmap_pgoff+0x3af/0x500 [ 30.579655] do_syscall_64+0x3f/0x90 [ 30.580144] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.580790] RIP: 0033:0x7f5d56957d82 [ 30.581246] 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 [ 30.583369] RSP: 002b:00007ffdb10829b8 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 30.584291] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f5d56957d82 [ 30.585151] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f5d55d91000 [ 30.586009] RBP: 00007f5d55d91000 R08: 0000000000000009 R09: 0000000000001000 [ 30.586913] R10: 0000000000000812 R11: 0000000000000206 R12: 0000559748daeec0 [ 30.587767] R13: 00007ffdb10829d0 R14: 00007ffdb1082a00 R15: 00007ffdb1082d60 [ 30.588649] [ 30.588955] [ 30.589176] Allocated by task 213: [ 30.589619] kasan_save_stack+0x22/0x50 [ 30.590156] kasan_set_track+0x25/0x30 [ 30.590679] __kasan_slab_alloc+0x59/0x70 [ 30.591232] kmem_cache_alloc+0x16b/0x370 [ 30.591793] vm_area_dup+0x20/0x160 [ 30.592272] __split_vma+0x170/0x950 [ 30.592755] split_vma+0xc6/0x110 [ 30.593208] mprotect_fixup+0x8d2/0xb30 [ 30.593736] do_mprotect_pkey+0x87e/0xd40 [ 30.594289] __x64_sys_mprotect+0x78/0xc0 [ 30.594828] do_syscall_64+0x3f/0x90 [ 30.595316] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.595987] [ 30.596217] Freed by task 19: [ 30.596622] kasan_save_stack+0x22/0x50 [ 30.597149] kasan_set_track+0x25/0x30 [ 30.597664] kasan_save_free_info+0x2b/0x50 [ 30.598243] __kasan_slab_free+0x10a/0x190 [ 30.598800] kmem_cache_free+0x10d/0x4d0 [ 30.599331] rcu_core+0x8c8/0x2860 [ 30.599798] __do_softirq+0x1b7/0x7d4 [ 30.600293] [ 30.600516] Last potentially related work creation: [ 30.601192] kasan_save_stack+0x22/0x50 [ 30.601722] __kasan_record_aux_stack+0x8e/0xa0 [ 30.602328] __call_rcu_common.constprop.0+0x6a/0xb90 [ 30.603000] remove_vma+0x139/0x170 [ 30.603471] do_vmi_align_munmap+0xd4a/0x11f0 [ 30.604053] do_vmi_munmap+0x1f1/0x2b0 [ 30.604567] __vm_munmap+0x138/0x3a0 [ 30.605053] __x64_sys_munmap+0x59/0x80 [ 30.605570] do_syscall_64+0x3f/0x90 [ 30.606061] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.606762] [ 30.606984] The buggy address belongs to the object at ffff888016b8a910 [ 30.606984] which belongs to the cache vm_area_struct of size 168 [ 30.608528] The buggy address is located 88 bytes inside of [ 30.608528] freed 168-byte region [ffff888016b8a910, ffff888016b8a9b8) [ 30.609998] [ 30.610237] The buggy address belongs to the physical page: [ 30.610935] page:000000002c2080f8 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x16b8a [ 30.612086] memcg:ffff88800f0bac01 [ 30.612530] flags: 0x100000000000200(slab|node=0|zone=1) [ 30.613206] page_type: 0xffffffff() [ 30.613674] raw: 0100000000000200 ffff8880087a0c80 dead000000000122 0000000000000000 [ 30.614660] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800f0bac01 [ 30.615609] page dumped because: kasan: bad access detected [ 30.616306] [ 30.616529] Memory state around the buggy address: [ 30.617136] ffff888016b8a800: fc fc fc fc fc 00 00 00 00 00 00 00 00 00 00 00 [ 30.618044] ffff888016b8a880: 00 00 00 00 00 00 00 00 00 00 fc fc fc fc fc fc [ 30.618959] >ffff888016b8a900: fc fc fa fb fb fb fb fb fb fb fb fb fb fb fb fb [ 30.619922] ^ [ 30.620743] ffff888016b8a980: fb fb fb fb fb fb fb fc fc fc fc fc fc fc fc fa [ 30.621647] ffff888016b8aa00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 30.622555] ================================================================== [ 30.623530] Disabling lock debugging due to kernel taint [ 33.114336] BUG: Bad rss-counter state mm:000000009365662f type:MM_FILEPAGES val:33 [ 33.115102] BUG: Bad rss-counter state mm:000000009365662f type:MM_ANONPAGES val:22 [ 33.561624] BUG: Bad rss-counter state mm:00000000a18deea5 type:MM_FILEPAGES val:33 [ 33.562376] BUG: Bad rss-counter state mm:00000000a18deea5 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:50123' (ECDSA) to the list of known hosts. 2023/06/20 22:19:58 fuzzer started 2023/06/20 22:19:58 dialing manager at localhost:36067 2023/06/20 22:19:58 checking machine... 2023/06/20 22:19:58 checking revisions... [ 34.215749] kmemleak: Automatic memory scanning thread ended 2023/06/20 22:19:58 testing simple program... [ 34.271352] cgroup: Unknown subsys name 'net' [ 34.335585] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 22:19:57 Registers: info registers vcpu 0 RAX=0000000000000001 RBX=0000000000000001 RCX=ffffffff864bce2c RDX=0000000000000000 RSI=0000000000000001 RDI=0000000000000001 RBP=ffff88806ce09af0 RSP=ffff88806ce09a28 R8 =ffffffff864bce30 R9 =ffff88806ce09ad8 R10=0000000000038001 R11=00000000000b6d7d R12=ffff88806ce09af8 R13=ffff88806ce09ae0 R14=0000000000000005 R15=ffff88806ce09a98 RIP=ffffffff81130b3f 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 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=00007f90483ec000 CR3=000000000c770000 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=ea94acb5b9af809ce84c49fb9d20261d XMM02=ec2efd57dc4c00df000000000011d4a0 XMM03=78cea61401dffac3000000000011d570 XMM04=a994a85ebcbb49db00000000000ae988 XMM05=19e9129bd510f2350000000000131a58 XMM06=8963e19da8853c5b00000000001308c0 XMM07=e042d86d42eb936e0000000000121c28 XMM08=78cea61401dffac3000000000011d570 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=0000000000000000 RBX=0000000000000000 RCX=0000000000040004 RDX=0000000080040004 RSI=ffffffff81806deb RDI=0000000000000000 RBP=ffff88800fa374f0 RSP=ffff88800fa37430 R8 =0000000000040004 R9 =fffffbfff0ba7a6a R10=ffffffff85d3d357 R11=00000000000b6a61 R12=ffff888008442140 R13=0000000000000000 R14=ffffea0000603200 R15=ffff88806cf3d130 RIP=ffffffff81806ee4 RFL=00000046 [---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 00007f63d08d3900 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=00007fff200c6000 CR3=000000001a1a8000 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=74696d7265705f6d61703d73726f746e XMM02=000000000000000000000000000000ff XMM03=5320444f4854454d5f54505952434e45 XMM04=40404040404040404040404040404040 XMM05=5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a XMM06=20202020202020202020202020202020 XMM07=00000000000000000000000000000000 XMM08=61662029286e65706f5f746964756100 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000