syzkaller login: [ 24.548449] sshd (213) used greatest stack depth: 23992 bytes left [ 24.549953] BUG: Bad rss-counter state mm:0000000001448ab5 type:MM_FILEPAGES val:33 [ 24.551825] BUG: Bad rss-counter state mm:0000000001448ab5 type:MM_ANONPAGES val:22 [ 24.707843] ================================================================== [ 24.708918] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 24.710069] Read of size 8 at addr ffff88800dde35c8 by task sshd/220 [ 24.711014] [ 24.711236] CPU: 0 PID: 220 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 24.712100] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 24.713088] Call Trace: [ 24.713413] <TASK> [ 24.713697] dump_stack_lvl+0x91/0xf0 [ 24.714204] print_report+0xcc/0x620 [ 24.714710] ? __virt_addr_valid+0x102/0x340 [ 24.715272] ? vma_interval_tree_remove+0xc75/0xec0 [ 24.715894] ? vma_interval_tree_remove+0xc75/0xec0 [ 24.716516] kasan_report+0xbe/0xf0 [ 24.716996] ? vma_interval_tree_remove+0xc75/0xec0 [ 24.717617] vma_interval_tree_remove+0xc75/0xec0 [ 24.718259] vma_prepare+0xc54/0x11a0 [ 24.718742] __split_vma+0x5af/0x950 [ 24.719230] ? __pfx___split_vma+0x10/0x10 [ 24.719756] ? find_held_lock+0x2c/0x110 [ 24.720279] do_vmi_align_munmap+0x2ba/0x11f0 [ 24.720858] ? lock_is_held_type+0x9f/0x120 [ 24.721398] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 24.722007] ? mtree_range_walk+0x632/0x900 [ 24.722584] ? mas_walk+0x5c7/0x7c0 [ 24.723063] do_vmi_munmap+0x1f1/0x2b0 [ 24.723559] mmap_region+0x1f9/0x2660 [ 24.724053] ? vm_mmap_pgoff+0x15c/0x3a0 [ 24.724566] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 24.725288] ? __pfx_lock_acquire+0x10/0x10 [ 24.725832] ? __pfx_mmap_region+0x10/0x10 [ 24.726381] ? security_mmap_addr+0x7d/0xa0 [ 24.726915] ? get_unmapped_area+0x1f5/0x3f0 [ 24.727464] do_mmap+0x854/0xf00 [ 24.727910] vm_mmap_pgoff+0x1a6/0x3a0 [ 24.728408] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 24.728975] ksys_mmap_pgoff+0x3af/0x500 [ 24.729484] do_syscall_64+0x3f/0x90 [ 24.729966] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 24.730638] RIP: 0033:0x7fd6955dcd82 [ 24.731095] 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 [ 24.733207] RSP: 002b:00007ffedb8a8678 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 24.734161] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007fd6955dcd82 [ 24.735014] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007fd694a16000 [ 24.735875] RBP: 00007fd694a16000 R08: 0000000000000009 R09: 0000000000001000 [ 24.736754] R10: 0000000000000812 R11: 0000000000000206 R12: 000055bc99227f70 [ 24.737603] R13: 00007ffedb8a8690 R14: 00007ffedb8a86c0 R15: 00007ffedb8a8a20 [ 24.738503] </TASK> [ 24.738804] [ 24.739021] Allocated by task 213: [ 24.739448] kasan_save_stack+0x22/0x50 [ 24.739960] kasan_set_track+0x25/0x30 [ 24.740460] __kasan_slab_alloc+0x59/0x70 [ 24.740992] kmem_cache_alloc+0x16b/0x370 [ 24.741516] vm_area_dup+0x20/0x160 [ 24.741969] __split_vma+0x170/0x950 [ 24.742454] split_vma+0xc6/0x110 [ 24.742895] mprotect_fixup+0x8d2/0xb30 [ 24.743398] do_mprotect_pkey+0x87e/0xd40 [ 24.743916] __x64_sys_mprotect+0x78/0xc0 [ 24.744438] do_syscall_64+0x3f/0x90 [ 24.744929] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 24.745582] [ 24.745800] Freed by task 213: [ 24.746203] kasan_save_stack+0x22/0x50 [ 24.746706] kasan_set_track+0x25/0x30 [ 24.747202] kasan_save_free_info+0x2b/0x50 [ 24.747737] __kasan_slab_free+0x10a/0x190 [ 24.748270] kmem_cache_free+0x10d/0x4d0 [ 24.748777] rcu_core+0x8c8/0x2860 [ 24.749224] __do_softirq+0x1b7/0x7d4 [ 24.749698] [ 24.749917] Last potentially related work creation: [ 24.750521] kasan_save_stack+0x22/0x50 [ 24.751030] __kasan_record_aux_stack+0x8e/0xa0 [ 24.751601] __call_rcu_common.constprop.0+0x6a/0xb90 [ 24.752239] remove_vma+0x139/0x170 [ 24.752690] do_vmi_align_munmap+0xd4a/0x11f0 [ 24.753247] do_vmi_munmap+0x1f1/0x2b0 [ 24.753737] __vm_munmap+0x138/0x3a0 [ 24.754218] __x64_sys_munmap+0x59/0x80 [ 24.754715] do_syscall_64+0x3f/0x90 [ 24.755191] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 24.755834] [ 24.756057] The buggy address belongs to the object at ffff88800dde3570 [ 24.756057] which belongs to the cache vm_area_struct of size 168 [ 24.757534] The buggy address is located 88 bytes inside of [ 24.757534] freed 168-byte region [ffff88800dde3570, ffff88800dde3618) [ 24.758957] [ 24.759171] The buggy address belongs to the physical page: [ 24.759831] page:00000000bb17dcee refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xdde3 [ 24.760914] memcg:ffff88800c4f3e01 [ 24.761344] flags: 0x100000000000200(slab|node=0|zone=1) [ 24.761991] page_type: 0xffffffff() [ 24.762452] raw: 0100000000000200 ffff88800879fc80 ffffea000035fac0 dead000000000006 [ 24.763380] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800c4f3e01 [ 24.764283] page dumped because: kasan: bad access detected [ 24.764952] [ 24.765173] Memory state around the buggy address: [ 24.765751] ffff88800dde3480: fc fa fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 24.766615] ffff88800dde3500: fb fb fb fb fb fb fc fc fc fc fc fc fc fc fa fb [ 24.767483] >ffff88800dde3580: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 24.768343] ^ [ 24.769010] ffff88800dde3600: fb fb fb fc fc fc fc fc fc fc fc fa fb fb fb fb [ 24.769872] ffff88800dde3680: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 24.770727] ================================================================== [ 24.771686] Disabling lock debugging due to kernel taint [ 27.022999] BUG: Bad rss-counter state mm:00000000dd51dc86 type:MM_FILEPAGES val:33 [ 27.024336] BUG: Bad rss-counter state mm:00000000dd51dc86 type:MM_ANONPAGES val:22 [ 27.437565] BUG: Bad rss-counter state mm:0000000053618b36 type:MM_FILEPAGES val:33 [ 27.438555] BUG: Bad rss-counter state mm:0000000053618b36 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:64275' (ECDSA) to the list of known hosts. 2023/06/19 11:39:18 fuzzer started 2023/06/19 11:39:18 dialing manager at localhost:44161 2023/06/19 11:39:18 checking machine... 2023/06/19 11:39:18 checking revisions... [ 28.189082] kmemleak: Automatic memory scanning thread ended 2023/06/19 11:39:18 testing simple program... [ 28.239435] cgroup: Unknown subsys name 'net' [ 28.291224] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 11:39:17 Registers: info registers vcpu 0 RAX=ffff88800e3a8900 RBX=ffff88800e3a8fc0 RCX=00000000000e5e40 RDX=00000000000e5e00 RSI=0000000000000dc0 RDI=00000000000e5e00 RBP=ffff888014697a70 RSP=ffff888014697a20 R8 =ffff88800e3a8900 R9 =0000000000040940 R10=ffffffff85d3bed7 R11=00000000000b6996 R12=ffff8880087b03c0 R13=0000000000000000 R14=0000000000000000 R15=ffffffff81ef1438 RIP=ffffffff81807e57 RFL=000002c6 [--SZ-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 00007fe6eb2d4900 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=00007ffe2e062518 CR3=000000000c754000 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=5c7f780bbc1faa2100000000000ae988 XMM05=1319e678c5640f8a0000000000133e30 XMM06=94aac670ef06ff650000000000133d98 XMM07=00000000000000000000000000000000 XMM08=415453454d49545f454d49544c414552 XMM09=00000000000000000000000000000000 XMM10=20200000000020202020202020200000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=0000000000000000 RBX=0000000000000000 RCX=0000000000000000 RDX=ffff888009520000 RSI=ffffffff81651bda RDI=ffffffff822443c8 RBP=0000000000000001 RSP=ffff88800952f1b8 R8 =0000000000000000 R9 =0000000000000000 R10=ffffffff85d3bed7 R11=0000000000009293 R12=0000000000000001 R13=ffff88801bc3aa50 R14=ffffffffffffffff R15=ffff88800b88f000 RIP=ffffffff814c081b 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 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=00005607a297e218 CR3=000000000ebf2000 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=ead53ce75c643d01b21b133f6f458153 XMM02=7240f04f4e84e97d7e500ebba2b84e28 XMM03=102f22f7e1c55084fee0fb42db3f40a8 XMM04=00000000000000000000000000000000 XMM05=00000000000000000000000000000000 XMM06=0d0c0f0e09080b0a0504070601000302 XMM07=0e0d0c0f0a09080b0605040702010003 XMM08=01000000000000000000000000000001 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000