syzkaller login: [ 32.995895] BUG: Bad rss-counter state mm:000000009b5be590 type:MM_FILEPAGES val:33 [ 32.997277] BUG: Bad rss-counter state mm:000000009b5be590 type:MM_ANONPAGES val:22 [ 33.040330] ================================================================== [ 33.041534] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 33.042710] Read of size 8 at addr ffff88800eda8798 by task sshd/221 [ 33.043580] [ 33.043824] CPU: 1 PID: 221 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 33.044889] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 33.046033] Call Trace: [ 33.046413] [ 33.046714] dump_stack_lvl+0x91/0xf0 [ 33.047264] print_report+0xcc/0x620 [ 33.047837] ? __virt_addr_valid+0x102/0x340 [ 33.048468] ? vma_interval_tree_remove+0xc75/0xec0 [ 33.049156] ? vma_interval_tree_remove+0xc75/0xec0 [ 33.049817] kasan_report+0xbe/0xf0 [ 33.050317] ? vma_interval_tree_remove+0xc75/0xec0 [ 33.051064] vma_interval_tree_remove+0xc75/0xec0 [ 33.051785] vma_prepare+0xc54/0x11a0 [ 33.052268] __split_vma+0x5af/0x950 [ 33.052738] ? __pfx___split_vma+0x10/0x10 [ 33.053272] ? find_held_lock+0x2c/0x110 [ 33.053791] do_vmi_align_munmap+0x2ba/0x11f0 [ 33.054530] ? lock_is_held_type+0x9f/0x120 [ 33.055076] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 33.055681] ? mtree_range_walk+0x632/0x900 [ 33.056241] ? mas_walk+0x5c7/0x7c0 [ 33.056712] do_vmi_munmap+0x1f1/0x2b0 [ 33.057204] mmap_region+0x1f9/0x2660 [ 33.057688] ? vm_mmap_pgoff+0x15c/0x3a0 [ 33.058229] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 33.058944] ? __pfx_lock_acquire+0x10/0x10 [ 33.059482] ? __pfx_mmap_region+0x10/0x10 [ 33.060012] ? security_mmap_addr+0x7d/0xa0 [ 33.060556] ? get_unmapped_area+0x1f5/0x3f0 [ 33.061123] do_mmap+0x854/0xf00 [ 33.061562] vm_mmap_pgoff+0x1a6/0x3a0 [ 33.062077] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 33.062640] ksys_mmap_pgoff+0x3af/0x500 [ 33.063154] do_syscall_64+0x3f/0x90 [ 33.063636] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 33.064303] RIP: 0033:0x7f389a975d82 [ 33.064777] 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 [ 33.066909] RSP: 002b:00007ffd54f7e318 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 33.067811] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f389a975d82 [ 33.068656] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f3899daf000 [ 33.069511] RBP: 00007f3899daf000 R08: 0000000000000009 R09: 0000000000001000 [ 33.070393] R10: 0000000000000812 R11: 0000000000000206 R12: 0000555be24e1ec0 [ 33.071249] R13: 00007ffd54f7e330 R14: 00007ffd54f7e360 R15: 00007ffd54f7e6c0 [ 33.072141] [ 33.072451] [ 33.072668] Allocated by task 214: [ 33.073102] kasan_save_stack+0x22/0x50 [ 33.073614] kasan_set_track+0x25/0x30 [ 33.074117] __kasan_slab_alloc+0x59/0x70 [ 33.074648] kmem_cache_alloc+0x16b/0x370 [ 33.075169] vm_area_dup+0x20/0x160 [ 33.075621] __split_vma+0x170/0x950 [ 33.076096] split_vma+0xc6/0x110 [ 33.076536] mprotect_fixup+0x8d2/0xb30 [ 33.077046] do_mprotect_pkey+0x87e/0xd40 [ 33.077568] __x64_sys_mprotect+0x78/0xc0 [ 33.078115] do_syscall_64+0x3f/0x90 [ 33.078598] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 33.079248] [ 33.079469] Freed by task 214: [ 33.079866] kasan_save_stack+0x22/0x50 [ 33.080374] kasan_set_track+0x25/0x30 [ 33.080870] kasan_save_free_info+0x2b/0x50 [ 33.081403] __kasan_slab_free+0x10a/0x190 [ 33.081936] kmem_cache_free+0x10d/0x4d0 [ 33.082459] rcu_core+0x8c8/0x2860 [ 33.082905] __do_softirq+0x1b7/0x7d4 [ 33.083385] [ 33.083599] Last potentially related work creation: [ 33.084190] kasan_save_stack+0x22/0x50 [ 33.084696] __kasan_record_aux_stack+0x8e/0xa0 [ 33.085277] __call_rcu_common.constprop.0+0x6a/0xb90 [ 33.086010] remove_vma+0x139/0x170 [ 33.086466] do_vmi_align_munmap+0xd4a/0x11f0 [ 33.087027] do_vmi_munmap+0x1f1/0x2b0 [ 33.087516] __vm_munmap+0x138/0x3a0 [ 33.087997] __x64_sys_munmap+0x59/0x80 [ 33.088507] do_syscall_64+0x3f/0x90 [ 33.088994] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 33.089642] [ 33.089860] The buggy address belongs to the object at ffff88800eda8740 [ 33.089860] which belongs to the cache vm_area_struct of size 168 [ 33.091352] The buggy address is located 88 bytes inside of [ 33.091352] freed 168-byte region [ffff88800eda8740, ffff88800eda87e8) [ 33.092764] [ 33.092982] The buggy address belongs to the physical page: [ 33.093644] page:00000000ffcdf52f refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xeda8 [ 33.094750] memcg:ffff88801a078b01 [ 33.095181] flags: 0x100000000000200(slab|node=0|zone=1) [ 33.095822] page_type: 0xffffffff() [ 33.096280] raw: 0100000000000200 ffff88800879fc80 dead000000000122 0000000000000000 [ 33.097206] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88801a078b01 [ 33.098143] page dumped because: kasan: bad access detected [ 33.098802] [ 33.099021] Memory state around the buggy address: [ 33.099603] ffff88800eda8680: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 33.100462] ffff88800eda8700: fc fc fc fc fc fc fc fc fa fb fb fb fb fb fb fb [ 33.101326] >ffff88800eda8780: fb fb fb fb fb fb fb fb fb fb fb fb fb fc fc fc [ 33.102202] ^ [ 33.102699] ffff88800eda8800: fc fc fc fc fc fa fb fb fb fb fb fb fb fb fb fb [ 33.103552] ffff88800eda8880: fb fb fb fb fb fb fb fb fb fb fc fc fc fc fc fc [ 33.104401] ================================================================== [ 33.105389] Disabling lock debugging due to kernel taint [ 35.188997] BUG: Bad rss-counter state mm:000000009341e16c type:MM_FILEPAGES val:33 [ 35.190009] BUG: Bad rss-counter state mm:000000009341e16c type:MM_ANONPAGES val:22 [ 35.762081] BUG: Bad rss-counter state mm:00000000afa3b6c5 type:MM_FILEPAGES val:33 [ 35.763376] BUG: Bad rss-counter state mm:00000000afa3b6c5 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:19806' (ECDSA) to the list of known hosts. 2023/06/19 15:56:13 fuzzer started 2023/06/19 15:56:14 dialing manager at localhost:44161 2023/06/19 15:56:14 checking machine... 2023/06/19 15:56:14 checking revisions... [ 36.440554] kmemleak: Automatic memory scanning thread ended 2023/06/19 15:56:14 testing simple program... [ 36.499339] cgroup: Unknown subsys name 'net' [ 36.547733] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 15:56:11 Registers: info registers vcpu 0 RAX=dffffc0000000000 RBX=ffff88800dcef410 RCX=0000000000000000 RDX=ffff88800e5dd1c0 RSI=ffff88800dcef41c RDI=0000000000000004 RBP=0000000000000001 RSP=ffff8880147a7c88 R8 =0000000000000004 R9 =0000000000000001 R10=0000000000000001 R11=0000000000000000 R12=0000000000000010 R13=0000000000000019 R14=0000000000000001 R15=ffff8880147a7d08 RIP=ffffffff81efd96a RFL=00000293 [--S-A-C] 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 00007fd00cdff900 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=00007fd00c255090 CR3=000000000c6c6000 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=5314d3c1ef9e5e86904343fcdc146386 XMM02=eff9b2d0a8fce9cb000000000011d960 XMM03=2c67c8bc2e329bc3000000000011da88 XMM04=72a01f7d19a1e43400000000000ae988 XMM05=a452c6acf769188a0000000000135448 XMM06=1889e28988a1f76400000000001341e8 XMM07=fb795ef6d65770560000000000124488 XMM08=2c67c8bc2e329bc3000000000011da88 XMM09=00000000000000000000000000000000 XMM10=20200000000020202020202020200000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=0000000000000000 RBX=ffffffff85652988 RCX=0000000000000100 RDX=ffff88800f671b40 RSI=ffffffff814c84dd RDI=0000000000000005 RBP=0000000000000000 RSP=ffff88806cf099f0 R8 =0000000000000005 R9 =0000000000000000 R10=0000000000000000 R11=00000000000b6996 R12=0000000000000000 R13=0000000000000000 R14=ffffffff85652988 R15=ffff88800dac9800 RIP=ffffffff814c0811 RFL=00000206 [-----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 00007f3a62c2f900 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=00007ffc08257000 CR3=000000000ee5e000 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=ffffffffffffffffffff000000000000 XMM01=000000000000003635006b6f6c6c756e XMM02=62003d73646e756f7200323135616873 XMM03=5320444f4854454d5f54505952434e45 XMM04=40404040404040404040404040404040 XMM05=5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a XMM06=20202020202020202020202020202020 XMM07=00000000000000000000000000000000 XMM08=00000000000000000000000000202020 XMM09=ff0000ffffffffffff00000000ffffff XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000