syzkaller login: [ 30.817777] BUG: Bad rss-counter state mm:000000003b7f8fcf type:MM_FILEPAGES val:33 [ 30.819314] BUG: Bad rss-counter state mm:000000003b7f8fcf type:MM_ANONPAGES val:22 [ 30.950328] ================================================================== [ 30.951270] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 30.952218] Read of size 8 at addr ffff8880196eaa50 by task sshd/221 [ 30.953101] [ 30.953321] CPU: 0 PID: 221 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 30.954186] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 30.955184] Call Trace: [ 30.955507] [ 30.955798] dump_stack_lvl+0x91/0xf0 [ 30.956289] print_report+0xcc/0x620 [ 30.956795] ? __virt_addr_valid+0x102/0x340 [ 30.957356] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.957990] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.958602] kasan_report+0xbe/0xf0 [ 30.959081] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.959711] vma_interval_tree_remove+0xc75/0xec0 [ 30.960334] vma_prepare+0xc54/0x11a0 [ 30.960817] __split_vma+0x5af/0x950 [ 30.961297] ? __pfx___split_vma+0x10/0x10 [ 30.961839] ? find_held_lock+0x2c/0x110 [ 30.962369] do_vmi_align_munmap+0x2ba/0x11f0 [ 30.962944] ? lock_is_held_type+0x9f/0x120 [ 30.963481] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 30.964091] ? mtree_range_walk+0x632/0x900 [ 30.964652] ? mas_walk+0x5c7/0x7c0 [ 30.965157] do_vmi_munmap+0x1f1/0x2b0 [ 30.965660] mmap_region+0x1f9/0x2660 [ 30.966149] ? vm_mmap_pgoff+0x15c/0x3a0 [ 30.966668] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 30.967388] ? __pfx_lock_acquire+0x10/0x10 [ 30.967919] ? __pfx_mmap_region+0x10/0x10 [ 30.968471] ? security_mmap_addr+0x7d/0xa0 [ 30.969012] ? get_unmapped_area+0x1f5/0x3f0 [ 30.969566] do_mmap+0x854/0xf00 [ 30.970006] vm_mmap_pgoff+0x1a6/0x3a0 [ 30.970506] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 30.971077] ksys_mmap_pgoff+0x3af/0x500 [ 30.971593] do_syscall_64+0x3f/0x90 [ 30.972075] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.972732] RIP: 0033:0x7f28b58dbd82 [ 30.973191] 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 [ 30.975303] RSP: 002b:00007ffc46bf30b8 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 30.976207] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f28b58dbd82 [ 30.977063] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f28b4d15000 [ 30.977914] RBP: 00007f28b4d15000 R08: 0000000000000009 R09: 0000000000001000 [ 30.978764] R10: 0000000000000812 R11: 0000000000000206 R12: 000055d68ecbdec0 [ 30.979605] R13: 00007ffc46bf30d0 R14: 00007ffc46bf3100 R15: 00007ffc46bf3460 [ 30.980481] [ 30.980776] [ 30.980995] Allocated by task 214: [ 30.981422] kasan_save_stack+0x22/0x50 [ 30.981961] kasan_set_track+0x25/0x30 [ 30.982468] __kasan_slab_alloc+0x59/0x70 [ 30.982994] kmem_cache_alloc+0x16b/0x370 [ 30.983510] vm_area_dup+0x20/0x160 [ 30.983975] __split_vma+0x170/0x950 [ 30.984455] split_vma+0xc6/0x110 [ 30.984902] mprotect_fixup+0x8d2/0xb30 [ 30.985405] do_mprotect_pkey+0x87e/0xd40 [ 30.985926] __x64_sys_mprotect+0x78/0xc0 [ 30.986461] do_syscall_64+0x3f/0x90 [ 30.986937] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.987594] [ 30.987811] Freed by task 214: [ 30.988206] kasan_save_stack+0x22/0x50 [ 30.988722] kasan_set_track+0x25/0x30 [ 30.989216] kasan_save_free_info+0x2b/0x50 [ 30.989755] __kasan_slab_free+0x10a/0x190 [ 30.990298] kmem_cache_free+0x10d/0x4d0 [ 30.990819] rcu_core+0x8c8/0x2860 [ 30.991267] __do_softirq+0x1b7/0x7d4 [ 30.991748] [ 30.991967] Last potentially related work creation: [ 30.992568] kasan_save_stack+0x22/0x50 [ 30.993070] __kasan_record_aux_stack+0x8e/0xa0 [ 30.993644] __call_rcu_common.constprop.0+0x6a/0xb90 [ 30.994296] remove_vma+0x139/0x170 [ 30.994752] do_vmi_align_munmap+0xd4a/0x11f0 [ 30.995323] do_vmi_munmap+0x1f1/0x2b0 [ 30.995814] __vm_munmap+0x138/0x3a0 [ 30.996282] __x64_sys_munmap+0x59/0x80 [ 30.996808] do_syscall_64+0x3f/0x90 [ 30.997289] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.997935] [ 30.998153] The buggy address belongs to the object at ffff8880196ea9f8 [ 30.998153] which belongs to the cache vm_area_struct of size 168 [ 30.999608] The buggy address is located 88 bytes inside of [ 30.999608] freed 168-byte region [ffff8880196ea9f8, ffff8880196eaaa0) [ 31.001016] [ 31.001236] The buggy address belongs to the physical page: [ 31.001893] page:0000000067355846 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x196ea [ 31.002990] memcg:ffff8880097f6d01 [ 31.003420] anon flags: 0x100000000000200(slab|node=0|zone=1) [ 31.004120] page_type: 0xffffffff() [ 31.004593] raw: 0100000000000200 ffff8880087a0c80 ffffea00006633c0 dead000000000003 [ 31.005518] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff8880097f6d01 [ 31.006429] page dumped because: kasan: bad access detected [ 31.007107] [ 31.007325] Memory state around the buggy address: [ 31.007906] ffff8880196ea900: fc fc fa fb fb fb fb fb fb fb fb fb fb fb fb fb [ 31.008773] ffff8880196ea980: fb fb fb fb fb fb fb fc fc fc fc fc fc fc fc fa [ 31.009628] >ffff8880196eaa00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 31.010475] ^ [ 31.011180] ffff8880196eaa80: fb fb fb fb fc fc fc fc fc fc fc fc fa fb fb fb [ 31.012026] ffff8880196eab00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 31.012901] ================================================================== [ 31.013879] Disabling lock debugging due to kernel taint [ 33.380790] BUG: Bad rss-counter state mm:00000000bc490339 type:MM_FILEPAGES val:33 [ 33.381796] BUG: Bad rss-counter state mm:00000000bc490339 type:MM_ANONPAGES val:22 [ 33.833637] BUG: Bad rss-counter state mm:000000000414d1d2 type:MM_FILEPAGES val:33 [ 33.834670] BUG: Bad rss-counter state mm:000000000414d1d2 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:3672' (ECDSA) to the list of known hosts. 2023/06/21 00:35:33 fuzzer started 2023/06/21 00:35:34 dialing manager at localhost:36067 2023/06/21 00:35:34 checking machine... 2023/06/21 00:35:34 checking revisions... [ 34.552681] kmemleak: Automatic memory scanning thread ended 2023/06/21 00:35:34 testing simple program... [ 34.603632] cgroup: Unknown subsys name 'net' [ 34.647440] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 00:35:33 Registers: info registers vcpu 0 RAX=dffffc0000000000 RBX=ffffffff8185a0f4 RCX=0000000000000001 RDX=1ffff110028d4e85 RSI=ffff8880146a7da0 RDI=ffffffff8185a0f4 RBP=ffffffff8185a0f4 RSP=ffff8880146a7378 R8 =0000000000000001 R9 =ffff8880146a7410 R10=0000000000038001 R11=0000000000023906 R12=ffff8880146a7498 R13=0000000000000000 R14=ffff88800effb680 R15=ffff8880196f3850 RIP=ffffffff811fc6f7 RFL=00000286 [--S--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 00007fee6a263900 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=00007fa359850650 CR3=000000000eed6000 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=b3c03d45e47c47e900000000000ae988 XMM05=82cca9ced962cae50000000000132c48 XMM06=24382353738a416f00000000001319e8 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=ffffffff8451250e RDX=ffffed100d9e6a01 RSI=0000000000000004 RDI=ffffffff81288ac5 RBP=dffffc0000000000 RSP=ffff888008e07e70 R8 =0000000000000000 R9 =ffffed100d9e6a00 R10=ffff88806cf35003 R11=ffff888008c04400 R12=ffffffff85d3d350 R13=1ffff110011c0fd3 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 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=00007fffc7e227f8 CR3=00000000195f2000 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=2033333a35333a3030203132206e754a XMM01=73732878696e755f6d6170203a5d3033 XMM02=65736f6c63206e6f6973736573203a29 XMM03=755f6d6170203a5d3033325b64687373 XMM04=69662068637573206f4e203a656c6163 XMM05=3a656c696620766e65206e65706f206f XMM06=65733a6468737328766e655f6d617020 XMM07=6b7a79732033333a35333a3030203132 XMM08=3d656e696c646d632022656369767265 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000