syzkaller login: [ 41.907096] BUG: Bad rss-counter state mm:00000000e59199a1 type:MM_FILEPAGES val:33 [ 41.908276] BUG: Bad rss-counter state mm:00000000e59199a1 type:MM_ANONPAGES val:22 [ 42.059503] ================================================================== [ 42.060435] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 42.061369] Read of size 8 at addr ffff88801a28ced8 by task sshd/220 [ 42.062144] [ 42.062457] CPU: 1 PID: 220 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 42.063348] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 42.064343] Call Trace: [ 42.064689] [ 42.064970] dump_stack_lvl+0x91/0xf0 [ 42.065455] print_report+0xcc/0x620 [ 42.065930] ? __virt_addr_valid+0x102/0x340 [ 42.066476] ? vma_interval_tree_remove+0xc75/0xec0 [ 42.067096] ? vma_interval_tree_remove+0xc75/0xec0 [ 42.067707] kasan_report+0xbe/0xf0 [ 42.068194] ? vma_interval_tree_remove+0xc75/0xec0 [ 42.068816] vma_interval_tree_remove+0xc75/0xec0 [ 42.069420] vma_prepare+0xc54/0x11a0 [ 42.069907] __split_vma+0x5af/0x950 [ 42.070385] ? __pfx___split_vma+0x10/0x10 [ 42.070909] ? find_held_lock+0x2c/0x110 [ 42.071435] do_vmi_align_munmap+0x2ba/0x11f0 [ 42.072005] ? lock_is_held_type+0x9f/0x120 [ 42.072545] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 42.073152] ? mtree_range_walk+0x632/0x900 [ 42.073705] ? mas_walk+0x5c7/0x7c0 [ 42.074182] do_vmi_munmap+0x1f1/0x2b0 [ 42.074669] mmap_region+0x1f9/0x2660 [ 42.075156] ? vm_mmap_pgoff+0x15c/0x3a0 [ 42.075659] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 42.076395] ? __pfx_lock_acquire+0x10/0x10 [ 42.076922] ? __pfx_mmap_region+0x10/0x10 [ 42.077452] ? security_mmap_addr+0x7d/0xa0 [ 42.077981] ? get_unmapped_area+0x1f5/0x3f0 [ 42.078522] do_mmap+0x854/0xf00 [ 42.078961] vm_mmap_pgoff+0x1a6/0x3a0 [ 42.079456] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 42.080029] ksys_mmap_pgoff+0x3af/0x500 [ 42.080539] do_syscall_64+0x3f/0x90 [ 42.081026] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 42.081677] RIP: 0033:0x7f3c1c7d9d82 [ 42.082138] 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 [ 42.084285] RSP: 002b:00007ffddfb00dd8 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 42.085188] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f3c1c7d9d82 [ 42.086029] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f3c1bc13000 [ 42.086877] RBP: 00007f3c1bc13000 R08: 0000000000000009 R09: 0000000000001000 [ 42.087719] R10: 0000000000000812 R11: 0000000000000206 R12: 000055d103aa5b20 [ 42.088578] R13: 00007ffddfb00df0 R14: 00007ffddfb00e20 R15: 00007ffddfb01180 [ 42.089422] [ 42.089720] [ 42.089937] Allocated by task 213: [ 42.090363] kasan_save_stack+0x22/0x50 [ 42.090863] kasan_set_track+0x25/0x30 [ 42.091359] __kasan_slab_alloc+0x59/0x70 [ 42.091903] kmem_cache_alloc+0x16b/0x370 [ 42.092417] vm_area_dup+0x20/0x160 [ 42.092875] __split_vma+0x170/0x950 [ 42.093340] split_vma+0xc6/0x110 [ 42.093783] mprotect_fixup+0x8d2/0xb30 [ 42.094280] do_mprotect_pkey+0x87e/0xd40 [ 42.094796] __x64_sys_mprotect+0x78/0xc0 [ 42.095317] do_syscall_64+0x3f/0x90 [ 42.095805] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 42.096445] [ 42.096659] Freed by task 203: [ 42.097047] kasan_save_stack+0x22/0x50 [ 42.097554] kasan_set_track+0x25/0x30 [ 42.098045] kasan_save_free_info+0x2b/0x50 [ 42.098573] __kasan_slab_free+0x10a/0x190 [ 42.099107] kmem_cache_free+0x10d/0x4d0 [ 42.099609] rcu_core+0x8c8/0x2860 [ 42.100065] __do_softirq+0x1b7/0x7d4 [ 42.100541] [ 42.100755] Last potentially related work creation: [ 42.101335] kasan_save_stack+0x22/0x50 [ 42.101835] __kasan_record_aux_stack+0x8e/0xa0 [ 42.102409] __call_rcu_common.constprop.0+0x6a/0xb90 [ 42.103049] remove_vma+0x139/0x170 [ 42.103571] do_vmi_align_munmap+0xd4a/0x11f0 [ 42.104137] do_vmi_munmap+0x1f1/0x2b0 [ 42.104645] __vm_munmap+0x138/0x3a0 [ 42.105107] __x64_sys_munmap+0x59/0x80 [ 42.105607] do_syscall_64+0x3f/0x90 [ 42.106084] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 42.106730] [ 42.106944] The buggy address belongs to the object at ffff88801a28ce80 [ 42.106944] which belongs to the cache vm_area_struct of size 168 [ 42.108406] The buggy address is located 88 bytes inside of [ 42.108406] freed 168-byte region [ffff88801a28ce80, ffff88801a28cf28) [ 42.109795] [ 42.110011] The buggy address belongs to the physical page: [ 42.110661] page:00000000fda94082 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x1a28c [ 42.111756] memcg:ffff88800f6a2801 [ 42.112204] flags: 0x100000000000200(slab|node=0|zone=1) [ 42.112912] page_type: 0xffffffff() [ 42.113371] raw: 0100000000000200 ffff88800879fc80 dead000000000122 0000000000000000 [ 42.114264] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800f6a2801 [ 42.115123] page dumped because: kasan: bad access detected [ 42.115741] [ 42.115954] Memory state around the buggy address: [ 42.116497] ffff88801a28cd80: fc fc fc 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 42.117298] ffff88801a28ce00: 00 00 00 00 00 00 00 00 fc fc fc fc fc fc fc fc [ 42.118102] >ffff88801a28ce80: fa fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 42.118897] ^ [ 42.119578] ffff88801a28cf00: fb fb fb fb fb fc fc fc fc fc fc fc fc fc fc fc [ 42.120409] ffff88801a28cf80: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc [ 42.121200] ================================================================== [ 42.122076] Disabling lock debugging due to kernel taint [ 44.825102] BUG: Bad rss-counter state mm:000000004f40217a type:MM_FILEPAGES val:33 [ 44.826285] BUG: Bad rss-counter state mm:000000004f40217a type:MM_ANONPAGES val:22 [ 45.365372] BUG: Bad rss-counter state mm:00000000ced5b796 type:MM_FILEPAGES val:33 [ 45.366709] BUG: Bad rss-counter state mm:00000000ced5b796 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:41467' (ECDSA) to the list of known hosts. 2023/06/19 22:15:47 fuzzer started 2023/06/19 22:15:47 dialing manager at localhost:44161 2023/06/19 22:15:47 checking machine... 2023/06/19 22:15:47 checking revisions... [ 46.029193] kmemleak: Automatic memory scanning thread ended 2023/06/19 22:15:47 testing simple program... [ 46.076549] cgroup: Unknown subsys name 'net' [ 46.130956] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 22:15:35 Registers: info registers vcpu 0 RAX=0000000000000001 RBX=ffffffff813ad420 RCX=ffffffff864bb001 RDX=ffff8880147ff280 RSI=0000000000000000 RDI=ffff88806ce09a88 RBP=ffff88806ce09b10 RSP=ffff88806ce09a78 R8 =ffffffff864bb032 R9 =ffff88806ce09ab8 R10=0000000000038001 R11=00000000000b6cb2 R12=ffff88806ce09b40 R13=0000000000000000 R14=ffff888015800000 R15=ffff888019dd4e80 RIP=ffffffff810bd05d RFL=00000292 [--S-A--] 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 00007f627359b900 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=000055cd6edc0768 CR3=000000001034e000 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=ffffffffffffffffffffffffffffffff XMM01=30306234386136303638616663356134 XMM02=38303062343861363036386166633561 XMM03=2f6c616e72756f6a2f676f6c2f6e7572 XMM04=18fe9c7c8a04bdf800000000000ae988 XMM05=deda86c66c70922d0000000000134fb8 XMM06=4fda316b135da52b0000000000134058 XMM07=00000000000000000000000000000000 XMM08=415453454d49545f454d49544c414552 XMM09=00000000000000000000000000000000 XMM10=20200000000020202020202020200000 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=00007ffe556e84b8 CR3=0000000005482000 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=00007f80ad2c251000005566225f8790 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