syzkaller login: [ 30.781218] BUG: Bad rss-counter state mm:00000000c6c9ca23 type:MM_FILEPAGES val:33 [ 30.782246] BUG: Bad rss-counter state mm:00000000c6c9ca23 type:MM_ANONPAGES val:22 [ 30.946599] ================================================================== [ 30.947727] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 30.948868] Read of size 8 at addr ffff888019cc3d08 by task sshd/219 [ 30.949897] [ 30.950125] CPU: 0 PID: 219 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 30.951042] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 30.952077] Call Trace: [ 30.952409] [ 30.952705] dump_stack_lvl+0x91/0xf0 [ 30.953222] print_report+0xcc/0x620 [ 30.953729] ? __virt_addr_valid+0x102/0x340 [ 30.954300] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.954964] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.955611] kasan_report+0xbe/0xf0 [ 30.956114] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.956781] vma_interval_tree_remove+0xc75/0xec0 [ 30.957413] vma_prepare+0xc54/0x11a0 [ 30.957918] __split_vma+0x5af/0x950 [ 30.958420] ? __pfx___split_vma+0x10/0x10 [ 30.959020] ? find_held_lock+0x2c/0x110 [ 30.959579] do_vmi_align_munmap+0x2ba/0x11f0 [ 30.960184] ? lock_is_held_type+0x9f/0x120 [ 30.960764] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 30.961419] ? mtree_range_walk+0x632/0x900 [ 30.961997] ? mas_walk+0x5c7/0x7c0 [ 30.962502] do_vmi_munmap+0x1f1/0x2b0 [ 30.963035] mmap_region+0x1f9/0x2660 [ 30.963552] ? vm_mmap_pgoff+0x15c/0x3a0 [ 30.964101] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 30.964870] ? __pfx_lock_acquire+0x10/0x10 [ 30.965433] ? __pfx_mmap_region+0x10/0x10 [ 30.966005] ? security_mmap_addr+0x7d/0xa0 [ 30.966568] ? get_unmapped_area+0x1f5/0x3f0 [ 30.967175] do_mmap+0x854/0xf00 [ 30.967633] vm_mmap_pgoff+0x1a6/0x3a0 [ 30.968167] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 30.968772] ksys_mmap_pgoff+0x3af/0x500 [ 30.969280] do_syscall_64+0x3f/0x90 [ 30.969759] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.970404] RIP: 0033:0x7f2b27eced82 [ 30.970891] 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 [ 30.973010] RSP: 002b:00007ffd01645428 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 30.973912] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f2b27eced82 [ 30.974781] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f2b27308000 [ 30.975616] RBP: 00007f2b27308000 R08: 0000000000000009 R09: 0000000000001000 [ 30.976475] R10: 0000000000000812 R11: 0000000000000206 R12: 000055b426000ec0 [ 30.977353] R13: 00007ffd01645440 R14: 00007ffd01645470 R15: 00007ffd016457d0 [ 30.978215] [ 30.978505] [ 30.978732] Allocated by task 212: [ 30.979162] kasan_save_stack+0x22/0x50 [ 30.979662] kasan_set_track+0x25/0x30 [ 30.980161] __kasan_slab_alloc+0x59/0x70 [ 30.980682] kmem_cache_alloc+0x16b/0x370 [ 30.981198] vm_area_dup+0x20/0x160 [ 30.981651] __split_vma+0x170/0x950 [ 30.982119] split_vma+0xc6/0x110 [ 30.982559] mprotect_fixup+0x8d2/0xb30 [ 30.983088] do_mprotect_pkey+0x87e/0xd40 [ 30.983602] __x64_sys_mprotect+0x78/0xc0 [ 30.984124] do_syscall_64+0x3f/0x90 [ 30.984597] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.985236] [ 30.985449] Freed by task 212: [ 30.985846] kasan_save_stack+0x22/0x50 [ 30.986358] kasan_set_track+0x25/0x30 [ 30.986866] kasan_save_free_info+0x2b/0x50 [ 30.987417] __kasan_slab_free+0x10a/0x190 [ 30.987980] kmem_cache_free+0x10d/0x4d0 [ 30.988510] rcu_core+0x8c8/0x2860 [ 30.988973] __do_softirq+0x1b7/0x7d4 [ 30.989469] [ 30.989692] Last potentially related work creation: [ 30.990309] kasan_save_stack+0x22/0x50 [ 30.990839] __kasan_record_aux_stack+0x8e/0xa0 [ 30.991443] __call_rcu_common.constprop.0+0x6a/0xb90 [ 30.992121] remove_vma+0x139/0x170 [ 30.992588] do_vmi_align_munmap+0xd4a/0x11f0 [ 30.993173] do_vmi_munmap+0x1f1/0x2b0 [ 30.993686] __vm_munmap+0x138/0x3a0 [ 30.994175] __x64_sys_munmap+0x59/0x80 [ 30.994712] do_syscall_64+0x3f/0x90 [ 30.995213] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.995884] [ 30.996107] The buggy address belongs to the object at ffff888019cc3cb0 [ 30.996107] which belongs to the cache vm_area_struct of size 168 [ 30.997673] The buggy address is located 88 bytes inside of [ 30.997673] freed 168-byte region [ffff888019cc3cb0, ffff888019cc3d58) [ 30.999150] [ 30.999371] The buggy address belongs to the physical page: [ 31.000067] page:000000000303b25c refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x19cc3 [ 31.001230] memcg:ffff888019cf6701 [ 31.001671] flags: 0x100000000000200(slab|node=0|zone=1) [ 31.002352] page_type: 0xffffffff() [ 31.002841] raw: 0100000000000200 ffff8880087a0c80 dead000000000122 0000000000000000 [ 31.003806] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff888019cf6701 [ 31.004776] page dumped because: kasan: bad access detected [ 31.005468] [ 31.005696] Memory state around the buggy address: [ 31.006313] ffff888019cc3c00: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 fc fc [ 31.007214] ffff888019cc3c80: fc fc fc fc fc fc fa fb fb fb fb fb fb fb fb fb [ 31.008118] >ffff888019cc3d00: fb fb fb fb fb fb fb fb fb fb fb fc fc fc fc fc [ 31.009015] ^ [ 31.009471] ffff888019cc3d80: fc fc fc fa fb fb fb fb fb fb fb fb fb fb fb fb [ 31.010369] ffff888019cc3e00: fb fb fb fb fb fb fb fb fc fc fc fc fc fc fc fc [ 31.011287] ================================================================== [ 31.012315] Disabling lock debugging due to kernel taint [ 32.873585] sshd (219) used greatest stack depth: 23704 bytes left [ 32.874566] BUG: Bad rss-counter state mm:00000000c125c5c9 type:MM_FILEPAGES val:33 [ 32.875434] BUG: Bad rss-counter state mm:00000000c125c5c9 type:MM_ANONPAGES val:22 [ 33.454414] BUG: Bad rss-counter state mm:000000004caac51d type:MM_FILEPAGES val:33 [ 33.455631] BUG: Bad rss-counter state mm:000000004caac51d type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:41320' (ECDSA) to the list of known hosts. 2023/06/21 06:01:45 fuzzer started 2023/06/21 06:01:45 dialing manager at localhost:36067 2023/06/21 06:01:45 checking machine... 2023/06/21 06:01:45 checking revisions... [ 34.098122] kmemleak: Automatic memory scanning thread ended 2023/06/21 06:01:45 testing simple program... [ 34.146597] cgroup: Unknown subsys name 'net' [ 34.197666] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 06:01:44 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=00007ffc4c4ceab8 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=00007f9b87f3c510000055e8550b2790 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=0000000000000000 RBX=ffff88800db71b40 RCX=0000000000000000 RDX=1ffff11001b6e3e7 RSI=ffffffff814c857a RDI=ffff88800db71f38 RBP=ffff88800db71b40 RSP=ffff88800e9bf488 R8 =0000000000000005 R9 =0000000000000000 R10=0000000000000000 R11=00000000000b6a61 R12=ffff88800db71b40 R13=0000000000000000 R14=ffffffff85652d08 R15=0000000000000d40 RIP=ffffffff81374581 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 00007f1a61b80700 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=00007f6257e554c0 CR3=000000000dc6a000 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=2034343a31303a3630203132206e754a XMM01=73732878696e755f6d6170203a5d3832 XMM02=65736f6c63206e6f6973736573203a29 XMM03=755f6d6170203a5d3832325b64687373 XMM04=69662068637573206f4e203a656c6163 XMM05=3a656c696620766e65206e65706f206f XMM06=65733a6468737328766e655f6d617020 XMM07=6b7a79732034343a31303a3630203132 XMM08=3d64696720303d64697520612f6e3d64 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000