syzkaller login: [ 30.815746] BUG: Bad rss-counter state mm:00000000d1c56fe4 type:MM_FILEPAGES val:33 [ 30.816948] BUG: Bad rss-counter state mm:00000000d1c56fe4 type:MM_ANONPAGES val:22 [ 30.856785] ================================================================== [ 30.857875] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 30.858920] Read of size 8 at addr ffff88800eee2058 by task sshd/218 [ 30.859707] [ 30.859969] CPU: 1 PID: 218 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 30.861074] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 30.862053] Call Trace: [ 30.862370] [ 30.862661] dump_stack_lvl+0x91/0xf0 [ 30.863170] print_report+0xcc/0x620 [ 30.863668] ? __virt_addr_valid+0x102/0x340 [ 30.864216] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.864837] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.865452] kasan_report+0xbe/0xf0 [ 30.865943] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.866577] vma_interval_tree_remove+0xc75/0xec0 [ 30.867193] vma_prepare+0xc54/0x11a0 [ 30.867683] __split_vma+0x5af/0x950 [ 30.868157] ? __pfx___split_vma+0x10/0x10 [ 30.868707] ? find_held_lock+0x2c/0x110 [ 30.869222] do_vmi_align_munmap+0x2ba/0x11f0 [ 30.869797] ? lock_is_held_type+0x9f/0x120 [ 30.870341] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 30.870979] ? mtree_range_walk+0x632/0x900 [ 30.871534] ? mas_walk+0x5c7/0x7c0 [ 30.872026] do_vmi_munmap+0x1f1/0x2b0 [ 30.872523] mmap_region+0x1f9/0x2660 [ 30.873013] ? vm_mmap_pgoff+0x15c/0x3a0 [ 30.873521] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 30.874253] ? __pfx_lock_acquire+0x10/0x10 [ 30.874800] ? __pfx_mmap_region+0x10/0x10 [ 30.875336] ? security_mmap_addr+0x7d/0xa0 [ 30.875886] ? get_unmapped_area+0x1f5/0x3f0 [ 30.876439] do_mmap+0x854/0xf00 [ 30.876902] vm_mmap_pgoff+0x1a6/0x3a0 [ 30.877406] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 30.877978] ksys_mmap_pgoff+0x3af/0x500 [ 30.878484] do_syscall_64+0x3f/0x90 [ 30.878991] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.879650] RIP: 0033:0x7fc1ba919d82 [ 30.880126] 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 [ 30.882303] RSP: 002b:00007fff0db743e8 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 30.883260] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007fc1ba919d82 [ 30.884131] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007fc1b9d53000 [ 30.884996] RBP: 00007fc1b9d53000 R08: 0000000000000009 R09: 0000000000001000 [ 30.885843] R10: 0000000000000812 R11: 0000000000000206 R12: 00005653cca2bec0 [ 30.886697] R13: 00007fff0db74400 R14: 00007fff0db74430 R15: 00007fff0db74790 [ 30.887574] [ 30.887866] [ 30.888103] Allocated by task 211: [ 30.888535] kasan_save_stack+0x22/0x50 [ 30.889063] kasan_set_track+0x25/0x30 [ 30.889560] __kasan_slab_alloc+0x59/0x70 [ 30.890105] kmem_cache_alloc+0x16b/0x370 [ 30.890627] vm_area_dup+0x20/0x160 [ 30.891116] __split_vma+0x170/0x950 [ 30.891580] split_vma+0xc6/0x110 [ 30.892036] mprotect_fixup+0x8d2/0xb30 [ 30.892550] do_mprotect_pkey+0x87e/0xd40 [ 30.893086] __x64_sys_mprotect+0x78/0xc0 [ 30.893611] do_syscall_64+0x3f/0x90 [ 30.894094] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.894740] [ 30.894979] Freed by task 211: [ 30.895391] kasan_save_stack+0x22/0x50 [ 30.895898] kasan_set_track+0x25/0x30 [ 30.896413] kasan_save_free_info+0x2b/0x50 [ 30.896947] __kasan_slab_free+0x10a/0x190 [ 30.897555] kmem_cache_free+0x10d/0x4d0 [ 30.898068] rcu_core+0x8c8/0x2860 [ 30.898531] __do_softirq+0x1b7/0x7d4 [ 30.899022] [ 30.899249] Last potentially related work creation: [ 30.899845] kasan_save_stack+0x22/0x50 [ 30.900360] __kasan_record_aux_stack+0x8e/0xa0 [ 30.900932] __call_rcu_common.constprop.0+0x6a/0xb90 [ 30.901603] remove_vma+0x139/0x170 [ 30.902056] do_vmi_align_munmap+0xd4a/0x11f0 [ 30.902621] do_vmi_munmap+0x1f1/0x2b0 [ 30.903125] __vm_munmap+0x138/0x3a0 [ 30.903605] __x64_sys_munmap+0x59/0x80 [ 30.904109] do_syscall_64+0x3f/0x90 [ 30.904602] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.905249] [ 30.905477] The buggy address belongs to the object at ffff88800eee2000 [ 30.905477] which belongs to the cache vm_area_struct of size 168 [ 30.906972] The buggy address is located 88 bytes inside of [ 30.906972] freed 168-byte region [ffff88800eee2000, ffff88800eee20a8) [ 30.908403] [ 30.908631] The buggy address belongs to the physical page: [ 30.909289] page:000000006c13c15f refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xeee2 [ 30.910388] memcg:ffff88800c84b801 [ 30.910837] flags: 0x100000000000200(slab|node=0|zone=1) [ 30.911502] page_type: 0xffffffff() [ 30.911951] raw: 0100000000000200 ffff8880087a0c80 ffffea000039af00 dead000000000006 [ 30.912884] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800c84b801 [ 30.913805] page dumped because: kasan: bad access detected [ 30.914477] [ 30.914712] Memory state around the buggy address: [ 30.915298] ffff88800eee1f00: fb fb fb fb fb fb fc fc fc fc fc fc fc fc fc fc [ 30.916166] ffff88800eee1f80: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc [ 30.917052] >ffff88800eee2000: fa fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 30.917924] ^ [ 30.918666] ffff88800eee2080: fb fb fb fb fb fc fc fc fc fc fc fc fc 00 00 00 [ 30.919550] ffff88800eee2100: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 30.920415] ================================================================== [ 30.921375] Disabling lock debugging due to kernel taint [ 33.225545] BUG: Bad rss-counter state mm:00000000348692e3 type:MM_FILEPAGES val:33 [ 33.226561] BUG: Bad rss-counter state mm:00000000348692e3 type:MM_ANONPAGES val:22 [ 33.679091] BUG: Bad rss-counter state mm:00000000eaf4a8b8 type:MM_FILEPAGES val:33 [ 33.680752] BUG: Bad rss-counter state mm:00000000eaf4a8b8 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:14154' (ECDSA) to the list of known hosts. 2023/06/20 19:38:10 fuzzer started 2023/06/20 19:38:10 dialing manager at localhost:36067 2023/06/20 19:38:10 checking machine... 2023/06/20 19:38:10 checking revisions... [ 34.390738] kmemleak: Automatic memory scanning thread ended 2023/06/20 19:38:10 testing simple program... [ 34.435163] cgroup: Unknown subsys name 'net' [ 34.475867] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 19:38:09 Registers: info registers vcpu 0 RAX=0000000000000003 RBX=0000000000000009 RCX=0000000000000d68 RDX=000000000000004f RSI=0000555890b06f08 RDI=00007ffd4f2ad920 RBP=0000000000000d68 RSP=00007ffd4f2ace70 R8 =0000000000000000 R9 =00007ffd4f2ad520 R10=00007ffd4f2ad920 R11=0000000000000000 R12=00007f0d7a6d78a0 R13=00007ffd4f2ad430 R14=0000000000000009 R15=0000555890b06f08 RIP=00007f0d7a59ac25 RFL=00000297 [--S-APC] CPL=3 II=0 A20=1 SMM=0 HLT=0 ES =0000 0000000000000000 00000000 00000000 CS =0033 0000000000000000 ffffffff 00a0fb00 DPL=3 CS64 [-RA] SS =002b 0000000000000000 ffffffff 00c0f300 DPL=3 DS [-WA] DS =0000 0000000000000000 00000000 00000000 FS =0000 00007f0d79d4d900 00000000 00000000 GS =0000 0000000000000000 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=00007f877782e650 CR3=000000000c95e000 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=25252525252525252525252525252525 XMM01=00000000ff00ff000000000000000000 XMM02=00000000ff0000000000000000000000 XMM03=006c616e72756f6a2f646d6574737973 XMM04=c028d834f62a81ca00000000000ae988 XMM05=55cea47235c8cfaa0000000000132a58 XMM06=bdf2e299e47b49d500000000001314d8 XMM07=fb795ef6d65770560000000000121a38 XMM08=4c5359530069253d595449524f495250 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=0000000000000001 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=00007ffe5e00f2c8 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=00007f313d32b5100000561f6380c790 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