syzkaller login: [ 35.867020] BUG: Bad rss-counter state mm:000000001a0da5dd type:MM_FILEPAGES val:33 [ 35.869073] BUG: Bad rss-counter state mm:000000001a0da5dd type:MM_ANONPAGES val:22 [ 36.031184] ================================================================== [ 36.032095] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 36.033043] Read of size 8 at addr ffff88800fe7d798 by task sshd/220 [ 36.033803] [ 36.034021] CPU: 1 PID: 220 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 36.035059] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 36.036048] Call Trace: [ 36.036364] [ 36.036652] dump_stack_lvl+0x91/0xf0 [ 36.037181] print_report+0xcc/0x620 [ 36.037658] ? __virt_addr_valid+0x102/0x340 [ 36.038210] ? vma_interval_tree_remove+0xc75/0xec0 [ 36.038825] ? vma_interval_tree_remove+0xc75/0xec0 [ 36.039445] kasan_report+0xbe/0xf0 [ 36.039923] ? vma_interval_tree_remove+0xc75/0xec0 [ 36.040539] vma_interval_tree_remove+0xc75/0xec0 [ 36.041158] vma_prepare+0xc54/0x11a0 [ 36.041643] __split_vma+0x5af/0x950 [ 36.042116] ? __pfx___split_vma+0x10/0x10 [ 36.042639] ? find_held_lock+0x2c/0x110 [ 36.043154] do_vmi_align_munmap+0x2ba/0x11f0 [ 36.043716] ? lock_is_held_type+0x9f/0x120 [ 36.044251] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 36.044899] ? mtree_range_walk+0x632/0x900 [ 36.045448] ? mas_walk+0x5c7/0x7c0 [ 36.045925] do_vmi_munmap+0x1f1/0x2b0 [ 36.046414] mmap_region+0x1f9/0x2660 [ 36.046900] ? vm_mmap_pgoff+0x15c/0x3a0 [ 36.047417] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 36.048122] ? __pfx_lock_acquire+0x10/0x10 [ 36.048650] ? __pfx_mmap_region+0x10/0x10 [ 36.049193] ? security_mmap_addr+0x7d/0xa0 [ 36.049725] ? get_unmapped_area+0x1f5/0x3f0 [ 36.050273] do_mmap+0x854/0xf00 [ 36.050712] vm_mmap_pgoff+0x1a6/0x3a0 [ 36.051203] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 36.051760] ksys_mmap_pgoff+0x3af/0x500 [ 36.052270] do_syscall_64+0x3f/0x90 [ 36.052770] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 36.053416] RIP: 0033:0x7f34d180ed82 [ 36.053870] 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 [ 36.055978] RSP: 002b:00007ffe14a85a58 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 36.056901] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f34d180ed82 [ 36.057752] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f34d0c48000 [ 36.058601] RBP: 00007f34d0c48000 R08: 0000000000000009 R09: 0000000000001000 [ 36.059445] R10: 0000000000000812 R11: 0000000000000206 R12: 000055a01d709ec0 [ 36.060290] R13: 00007ffe14a85a70 R14: 00007ffe14a85aa0 R15: 00007ffe14a85e00 [ 36.061158] [ 36.061450] [ 36.061663] Allocated by task 213: [ 36.062098] kasan_save_stack+0x22/0x50 [ 36.062609] kasan_set_track+0x25/0x30 [ 36.063108] __kasan_slab_alloc+0x59/0x70 [ 36.063630] kmem_cache_alloc+0x16b/0x370 [ 36.064142] vm_area_dup+0x20/0x160 [ 36.064599] __split_vma+0x170/0x950 [ 36.065084] split_vma+0xc6/0x110 [ 36.065526] mprotect_fixup+0x8d2/0xb30 [ 36.066039] do_mprotect_pkey+0x87e/0xd40 [ 36.066555] __x64_sys_mprotect+0x78/0xc0 [ 36.067077] do_syscall_64+0x3f/0x90 [ 36.067551] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 36.068228] [ 36.068472] Freed by task 209: [ 36.068931] kasan_save_stack+0x22/0x50 [ 36.069433] kasan_set_track+0x25/0x30 [ 36.069924] kasan_save_free_info+0x2b/0x50 [ 36.070454] __kasan_slab_free+0x10a/0x190 [ 36.070985] kmem_cache_free+0x10d/0x4d0 [ 36.071491] rcu_core+0x8c8/0x2860 [ 36.071941] __do_softirq+0x1b7/0x7d4 [ 36.072418] [ 36.072636] Last potentially related work creation: [ 36.073243] kasan_save_stack+0x22/0x50 [ 36.073743] __kasan_record_aux_stack+0x8e/0xa0 [ 36.074325] __call_rcu_common.constprop.0+0x6a/0xb90 [ 36.074966] remove_vma+0x139/0x170 [ 36.075496] do_vmi_align_munmap+0xd4a/0x11f0 [ 36.076054] do_vmi_munmap+0x1f1/0x2b0 [ 36.076547] __vm_munmap+0x138/0x3a0 [ 36.077019] __x64_sys_munmap+0x59/0x80 [ 36.077513] do_syscall_64+0x3f/0x90 [ 36.077989] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 36.078634] [ 36.078851] The buggy address belongs to the object at ffff88800fe7d740 [ 36.078851] which belongs to the cache vm_area_struct of size 168 [ 36.080331] The buggy address is located 88 bytes inside of [ 36.080331] freed 168-byte region [ffff88800fe7d740, ffff88800fe7d7e8) [ 36.081735] [ 36.081957] The buggy address belongs to the physical page: [ 36.082611] page:000000005b5bd499 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xfe7d [ 36.083699] memcg:ffff888014541701 [ 36.084124] flags: 0x100000000000200(slab|node=0|zone=1) [ 36.084778] page_type: 0xffffffff() [ 36.085224] raw: 0100000000000200 ffff88800879fc80 dead000000000122 0000000000000000 [ 36.086155] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff888014541701 [ 36.087073] page dumped because: kasan: bad access detected [ 36.087739] [ 36.087956] Memory state around the buggy address: [ 36.088529] ffff88800fe7d680: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 36.089387] ffff88800fe7d700: fc fc fc fc fc fc fc fc fa fb fb fb fb fb fb fb [ 36.090241] >ffff88800fe7d780: fb fb fb fb fb fb fb fb fb fb fb fb fb fc fc fc [ 36.091093] ^ [ 36.091590] ffff88800fe7d800: fc fc fc fc fc fa fb fb fb fb fb fb fb fb fb fb [ 36.092456] ffff88800fe7d880: fb fb fb fb fb fb fb fb fb fb fc fc fc fc fc fc [ 36.093323] ================================================================== [ 36.094428] Disabling lock debugging due to kernel taint [ 38.076890] BUG: Bad rss-counter state mm:00000000e92fd657 type:MM_FILEPAGES val:33 [ 38.077929] BUG: Bad rss-counter state mm:00000000e92fd657 type:MM_ANONPAGES val:22 [ 38.562143] BUG: Bad rss-counter state mm:000000007a332acc type:MM_FILEPAGES val:33 [ 38.563145] BUG: Bad rss-counter state mm:000000007a332acc type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:39005' (ECDSA) to the list of known hosts. 2023/06/20 01:16:00 fuzzer started 2023/06/20 01:16:00 dialing manager at localhost:44161 2023/06/20 01:16:00 checking machine... 2023/06/20 01:16:00 checking revisions... [ 39.331283] kmemleak: Automatic memory scanning thread ended 2023/06/20 01:16:00 testing simple program... [ 39.380419] cgroup: Unknown subsys name 'net' [ 39.432573] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 01:15:52 Registers: info registers vcpu 0 RAX=0000000000000007 RBX=0000000000000000 RCX=ffffffff8189c9f7 RDX=0000000000000000 RSI=0000000000000000 RDI=0000000000000000 RBP=ffff8880102bfc48 RSP=ffff8880102bfab0 R8 =0000000000000000 R9 =fffffbfff0ba77da R10=ffffffff85d3bed7 R11=0000000000000001 R12=0000000000000000 R13=dffffc0000000000 R14=0000000000008000 R15=0000000000000000 RIP=ffffffff814c0388 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 00007fcd9d44c900 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=00007fffb9fec000 CR3=000000001a25c000 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=635f6e6f69737365733a4d41503d706f XMM01=6f6c5f6d61702c78756e696c65735f6d XMM02=61702c74696d7265705f6d61702c7469 XMM03=655f6d61702c7374696d696c5f6d6170 XMM04=3d6c616e696d72657420322e322e302e XMM05=3d656d616e74736f682022646873732f XMM06=746f6f72223d746363612078756e696c XMM07=6e655f6d61702c7374696d696c5f6d61 XMM08=652075253d64692073253d706f000000 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=ffff88806cf35000 RBX=0000000000000001 RCX=ffffffff8450c50e RDX=ffffed100d9e6a01 RSI=0000000000000004 RDI=ffffffff812889a5 RBP=dffffc0000000000 RSP=ffff888008e27e70 R8 =0000000000000000 R9 =ffffed100d9e6a00 R10=ffff88806cf35003 R11=ffff888008c58400 R12=ffffffff85d3bed0 R13=1ffff110011c4fd3 R14=0000000000000000 R15=0000000000000000 RIP=ffffffff8450d49f 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=00007f59d3f003f0 CR3=000000000d4f2000 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=cfd0326a423dd6adc64ddc811d85cae1 XMM02=00000000001200a0ec2efd57dc4c00df XMM03=00000000001246c8ecc56c7276bbb4a7 XMM04=3bdc1a9e249693e400000000000ae988 XMM05=19e9129bd510f2350000000000134270 XMM06=3139be7af00a0c3800000000001330d8 XMM07=e042d86d42eb936e0000000000124948 XMM08=ecc56c7276bbb4a70000000000120100 XMM09=00000000000000000000000000000000 XMM10=20200000000020202020202020200000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000