syzkaller login: [ 30.860474] BUG: Bad rss-counter state mm:00000000aef88b96 type:MM_FILEPAGES val:33 [ 30.861539] BUG: Bad rss-counter state mm:00000000aef88b96 type:MM_ANONPAGES val:22 [ 30.971542] ================================================================== [ 30.972608] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 30.973337] Read of size 8 at addr ffff888015d9c228 by task sshd/219 [ 30.973922] [ 30.974087] CPU: 1 PID: 219 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 30.974756] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 30.975509] Call Trace: [ 30.975763] [ 30.975984] dump_stack_lvl+0x91/0xf0 [ 30.976368] print_report+0xcc/0x620 [ 30.976742] ? __virt_addr_valid+0x102/0x340 [ 30.977161] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.977633] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.978104] kasan_report+0xbe/0xf0 [ 30.978474] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.978960] vma_interval_tree_remove+0xc75/0xec0 [ 30.979429] vma_prepare+0xc54/0x11a0 [ 30.979800] __split_vma+0x5af/0x950 [ 30.980168] ? __pfx___split_vma+0x10/0x10 [ 30.980576] ? find_held_lock+0x2c/0x110 [ 30.980978] do_vmi_align_munmap+0x2ba/0x11f0 [ 30.981409] ? lock_is_held_type+0x9f/0x120 [ 30.981822] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 30.982293] ? mtree_range_walk+0x632/0x900 [ 30.982718] ? mas_walk+0x5c7/0x7c0 [ 30.983083] do_vmi_munmap+0x1f1/0x2b0 [ 30.983475] mmap_region+0x1f9/0x2660 [ 30.983848] ? vm_mmap_pgoff+0x15c/0x3a0 [ 30.984244] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 30.984716] ? __pfx_lock_acquire+0x10/0x10 [ 30.985259] ? __pfx_mmap_region+0x10/0x10 [ 30.985645] ? security_mmap_addr+0x7d/0xa0 [ 30.986031] ? get_unmapped_area+0x1f5/0x3f0 [ 30.986465] do_mmap+0x854/0xf00 [ 30.986808] vm_mmap_pgoff+0x1a6/0x3a0 [ 30.987154] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 30.987632] ksys_mmap_pgoff+0x3af/0x500 [ 30.988035] do_syscall_64+0x3f/0x90 [ 30.988378] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.988844] RIP: 0033:0x7fb481c23d82 [ 30.989166] 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 [ 30.990648] RSP: 002b:00007ffc358cd688 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 30.991292] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007fb481c23d82 [ 30.991908] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007fb48105d000 [ 30.992509] RBP: 00007fb48105d000 R08: 0000000000000009 R09: 0000000000001000 [ 30.993095] R10: 0000000000000812 R11: 0000000000000206 R12: 000055c3dc053f70 [ 30.993700] R13: 00007ffc358cd6a0 R14: 00007ffc358cd6d0 R15: 00007ffc358cda30 [ 30.994304] [ 30.994512] [ 30.994665] Allocated by task 212: [ 30.994965] kasan_save_stack+0x22/0x50 [ 30.995322] kasan_set_track+0x25/0x30 [ 30.995679] __kasan_slab_alloc+0x59/0x70 [ 30.996049] kmem_cache_alloc+0x16b/0x370 [ 30.996420] vm_area_dup+0x20/0x160 [ 30.996740] __split_vma+0x170/0x950 [ 30.997066] split_vma+0xc6/0x110 [ 30.997381] mprotect_fixup+0x8d2/0xb30 [ 30.997728] do_mprotect_pkey+0x87e/0xd40 [ 30.998088] __x64_sys_mprotect+0x78/0xc0 [ 30.998412] do_syscall_64+0x3f/0x90 [ 30.998677] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.999058] [ 30.999180] Freed by task 202: [ 30.999405] kasan_save_stack+0x22/0x50 [ 30.999676] kasan_set_track+0x25/0x30 [ 30.999953] kasan_save_free_info+0x2b/0x50 [ 31.000242] __kasan_slab_free+0x10a/0x190 [ 31.000532] kmem_cache_free+0x10d/0x4d0 [ 31.000816] rcu_core+0x8c8/0x2860 [ 31.001060] __do_softirq+0x1b7/0x7d4 [ 31.001327] [ 31.001445] Last potentially related work creation: [ 31.001781] kasan_save_stack+0x22/0x50 [ 31.002054] __kasan_record_aux_stack+0x8e/0xa0 [ 31.002366] __call_rcu_common.constprop.0+0x6a/0xb90 [ 31.002727] remove_vma+0x139/0x170 [ 31.002977] do_vmi_align_munmap+0xd4a/0x11f0 [ 31.003278] do_vmi_munmap+0x1f1/0x2b0 [ 31.003557] __vm_munmap+0x138/0x3a0 [ 31.003821] __x64_sys_munmap+0x59/0x80 [ 31.004090] do_syscall_64+0x3f/0x90 [ 31.004350] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.004708] [ 31.004829] The buggy address belongs to the object at ffff888015d9c1d0 [ 31.004829] which belongs to the cache vm_area_struct of size 168 [ 31.005623] The buggy address is located 88 bytes inside of [ 31.005623] freed 168-byte region [ffff888015d9c1d0, ffff888015d9c278) [ 31.006388] [ 31.006505] The buggy address belongs to the physical page: [ 31.006882] page:00000000c25e9f61 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x15d9c [ 31.007479] memcg:ffff88800c9bc701 [ 31.007728] flags: 0x100000000000200(slab|node=0|zone=1) [ 31.008075] page_type: 0xffffffff() [ 31.008318] raw: 0100000000000200 ffff8880087a0c80 dead000000000122 0000000000000000 [ 31.008844] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800c9bc701 [ 31.009397] page dumped because: kasan: bad access detected [ 31.009798] [ 31.009919] Memory state around the buggy address: [ 31.010268] ffff888015d9c100: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 31.010780] ffff888015d9c180: 00 00 fc fc fc fc fc fc fc fc fa fb fb fb fb fb [ 31.011289] >ffff888015d9c200: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fc [ 31.011825] ^ [ 31.012151] ffff888015d9c280: fc fc fc fc fc fc fc fa fb fb fb fb fb fb fb fb [ 31.012675] ffff888015d9c300: fb fb fb fb fb fb fb fb fb fb fb fb fc fc fc fc [ 31.013198] ================================================================== [ 31.013872] Disabling lock debugging due to kernel taint [ 32.775194] BUG: Bad rss-counter state mm:00000000daa1cd22 type:MM_FILEPAGES val:33 [ 32.776281] BUG: Bad rss-counter state mm:00000000daa1cd22 type:MM_ANONPAGES val:22 [ 33.335474] BUG: Bad rss-counter state mm:000000003c5dcbbb type:MM_FILEPAGES val:33 [ 33.336665] BUG: Bad rss-counter state mm:000000003c5dcbbb type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:13087' (ECDSA) to the list of known hosts. 2023/06/20 14:04:43 fuzzer started 2023/06/20 14:04:44 dialing manager at localhost:36067 2023/06/20 14:04:44 checking machine... 2023/06/20 14:04:44 checking revisions... [ 33.997763] kmemleak: Automatic memory scanning thread ended 2023/06/20 14:04:44 testing simple program... [ 34.047342] cgroup: Unknown subsys name 'net' [ 34.083485] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 14:04:43 Registers: info registers vcpu 0 RAX=dffffc0000000000 RBX=ffffffff813ad470 RCX=ffffffff86138e01 RDX=1ffff110028f2f37 RSI=ffffffff8180c705 RDI=ffff8880147979b8 RBP=ffff888014797a50 RSP=ffff888014797990 R8 =ffffffff86138e90 R9 =ffff8880147979f8 R10=0000000000038001 R11=0000000000020d8f R12=ffff888014797a80 R13=0000000000000000 R14=ffff888014798000 R15=ffff8880147979b8 RIP=ffffffff811305f0 RFL=00000212 [----A--] 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 =0000 0000000000000000 00000000 00000000 DS =0000 0000000000000000 00000000 00000000 FS =0000 00007f0514156900 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=00007fd060a61650 CR3=000000000f254000 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=d9c1d49fc467e4924446b86cef22f4fd XMM02=000000000011a898eff9b2d0a8fce9cb XMM03=000000000011a9682c67c8bc2e329bc3 XMM04=7bd111faa702c43400000000000ae988 XMM05=f2d5e5aec51894a000000000001330e0 XMM06=4fda316b135da52b0000000000131ed0 XMM07=fb795ef6d65770560000000000121ea8 XMM08=2c67c8bc2e329bc3000000000011a908 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=00007ffd55b876d8 CR3=00000000174a8000 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=2033343a34303a3431203032206e754a XMM01=73732878696e755f6d6170203a5d3932 XMM02=65736f6c63206e6f6973736573203a29 XMM03=755f6d6170203a5d3932325b64687373 XMM04=69662068637573206f4e203a656c6163 XMM05=3a656c696620766e65206e65706f206f XMM06=65733a6468737328766e655f6d617020 XMM07=6b7a79732033343a34303a3431203032 XMM08=3d656e696c646d632022656369767265 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000