syzkaller login: [ 28.780040] BUG: Bad rss-counter state mm:00000000a4a25e8b type:MM_FILEPAGES val:33 [ 28.781311] BUG: Bad rss-counter state mm:00000000a4a25e8b type:MM_ANONPAGES val:22 [ 28.951816] ================================================================== [ 28.952787] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 28.953781] Read of size 8 at addr ffff88800e50a798 by task sshd/220 [ 28.954735] [ 28.954977] CPU: 1 PID: 220 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 28.955932] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 28.956979] Call Trace: [ 28.957323] [ 28.957623] dump_stack_lvl+0x91/0xf0 [ 28.958151] print_report+0xcc/0x620 [ 28.958661] ? __virt_addr_valid+0x102/0x340 [ 28.959261] ? vma_interval_tree_remove+0xc75/0xec0 [ 28.959942] ? vma_interval_tree_remove+0xc75/0xec0 [ 28.960608] kasan_report+0xbe/0xf0 [ 28.961124] ? vma_interval_tree_remove+0xc75/0xec0 [ 28.961810] vma_interval_tree_remove+0xc75/0xec0 [ 28.962469] vma_prepare+0xc54/0x11a0 [ 28.962997] __split_vma+0x5af/0x950 [ 28.963519] ? __pfx___split_vma+0x10/0x10 [ 28.964116] ? find_held_lock+0x2c/0x110 [ 28.964690] do_vmi_align_munmap+0x2ba/0x11f0 [ 28.965317] ? lock_is_held_type+0x9f/0x120 [ 28.965911] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 28.966583] ? mtree_range_walk+0x632/0x900 [ 28.967198] ? mas_walk+0x5c7/0x7c0 [ 28.967722] do_vmi_munmap+0x1f1/0x2b0 [ 28.968292] mmap_region+0x1f9/0x2660 [ 28.968836] ? vm_mmap_pgoff+0x15c/0x3a0 [ 28.969410] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 28.970205] ? __pfx_lock_acquire+0x10/0x10 [ 28.970797] ? __pfx_mmap_region+0x10/0x10 [ 28.971382] ? security_mmap_addr+0x7d/0xa0 [ 28.971980] ? get_unmapped_area+0x1f5/0x3f0 [ 28.972590] do_mmap+0x854/0xf00 [ 28.973080] vm_mmap_pgoff+0x1a6/0x3a0 [ 28.973628] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 28.974249] ksys_mmap_pgoff+0x3af/0x500 [ 28.974812] do_syscall_64+0x3f/0x90 [ 28.975342] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 28.976066] RIP: 0033:0x7f3680140d82 [ 28.976566] 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 [ 28.978922] RSP: 002b:00007ffdac6d3698 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 28.979944] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f3680140d82 [ 28.980889] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f367f57a000 [ 28.981821] RBP: 00007f367f57a000 R08: 0000000000000009 R09: 0000000000001000 [ 28.982767] R10: 0000000000000812 R11: 0000000000000206 R12: 000055a91eb21980 [ 28.983708] R13: 00007ffdac6d36b0 R14: 00007ffdac6d36e0 R15: 00007ffdac6d3a40 [ 28.984674] [ 28.984996] [ 28.985232] Allocated by task 212: [ 28.985711] kasan_save_stack+0x22/0x50 [ 28.986266] kasan_set_track+0x25/0x30 [ 28.986814] __kasan_slab_alloc+0x59/0x70 [ 28.987386] kmem_cache_alloc+0x16b/0x370 [ 28.987968] vm_area_dup+0x20/0x160 [ 28.988466] __split_vma+0x170/0x950 [ 28.988979] split_vma+0xc6/0x110 [ 28.989468] mprotect_fixup+0x8d2/0xb30 [ 28.990027] do_mprotect_pkey+0x87e/0xd40 [ 28.990602] __x64_sys_mprotect+0x78/0xc0 [ 28.991182] do_syscall_64+0x3f/0x90 [ 28.991706] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 28.992443] [ 28.992683] Freed by task 212: [ 28.993117] kasan_save_stack+0x22/0x50 [ 28.993674] kasan_set_track+0x25/0x30 [ 28.994224] kasan_save_free_info+0x2b/0x50 [ 28.994813] __kasan_slab_free+0x10a/0x190 [ 28.995408] kmem_cache_free+0x10d/0x4d0 [ 28.995987] rcu_core+0x8c8/0x2860 [ 28.996565] __do_softirq+0x1b7/0x7d4 [ 28.997091] [ 28.997326] Last potentially related work creation: [ 28.997966] kasan_save_stack+0x22/0x50 [ 28.998519] __kasan_record_aux_stack+0x8e/0xa0 [ 28.999161] __call_rcu_common.constprop.0+0x6a/0xb90 [ 28.999904] remove_vma+0x139/0x170 [ 29.000404] do_vmi_align_munmap+0xd4a/0x11f0 [ 29.001019] do_vmi_munmap+0x1f1/0x2b0 [ 29.001552] __vm_munmap+0x138/0x3a0 [ 29.002065] __x64_sys_munmap+0x59/0x80 [ 29.002614] do_syscall_64+0x3f/0x90 [ 29.003137] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 29.003860] [ 29.004101] The buggy address belongs to the object at ffff88800e50a740 [ 29.004101] which belongs to the cache vm_area_struct of size 168 [ 29.005744] The buggy address is located 88 bytes inside of [ 29.005744] freed 168-byte region [ffff88800e50a740, ffff88800e50a7e8) [ 29.007305] [ 29.007543] The buggy address belongs to the physical page: [ 29.008295] page:00000000df2e4170 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xe50a [ 29.009497] memcg:ffff88800e0f1201 [ 29.009971] flags: 0x100000000000200(slab|node=0|zone=1) [ 29.010690] page_type: 0xffffffff() [ 29.011188] raw: 0100000000000200 ffff8880087a0c80 ffffea00003968c0 dead000000000004 [ 29.012216] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800e0f1201 [ 29.013226] page dumped because: kasan: bad access detected [ 29.013952] [ 29.014194] Memory state around the buggy address: [ 29.014848] ffff88800e50a680: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 29.015816] ffff88800e50a700: fc fc fc fc fc fc fc fc fa fb fb fb fb fb fb fb [ 29.016760] >ffff88800e50a780: fb fb fb fb fb fb fb fb fb fb fb fb fb fc fc fc [ 29.017709] ^ [ 29.018257] ffff88800e50a800: fc fc fc fc fc 00 00 00 00 00 00 00 00 00 00 00 [ 29.019206] ffff88800e50a880: 00 00 00 00 00 00 00 00 00 00 fc fc fc fc fc fc [ 29.020151] ================================================================== [ 29.021294] Disabling lock debugging due to kernel taint [ 30.867454] BUG: Bad rss-counter state mm:00000000897afe2c type:MM_FILEPAGES val:33 [ 30.868999] BUG: Bad rss-counter state mm:00000000897afe2c type:MM_ANONPAGES val:22 [ 31.455174] BUG: Bad rss-counter state mm:00000000419d8859 type:MM_FILEPAGES val:33 [ 31.456343] BUG: Bad rss-counter state mm:00000000419d8859 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:29317' (ECDSA) to the list of known hosts. 2023/06/20 13:45:21 fuzzer started 2023/06/20 13:45:21 dialing manager at localhost:36067 2023/06/20 13:45:21 checking machine... 2023/06/20 13:45:21 checking revisions... [ 32.160223] kmemleak: Automatic memory scanning thread ended 2023/06/20 13:45:22 testing simple program... [ 32.210028] cgroup: Unknown subsys name 'net' [ 32.264620] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 13:45:21 Registers: info registers vcpu 0 RAX=0000000000000000 RBX=0000000000000000 RCX=ffffffff814c856d RDX=ffff88801410d1c0 RSI=0000000000000000 RDI=0000000000000005 RBP=0000000000000000 RSP=ffff888016bd7928 R8 =0000000000000005 R9 =0000000000000000 R10=0000000000000000 R11=00000000000b6a61 R12=0000000000000000 R13=0000000000000000 R14=ffffffff85652c08 R15=ffff88800d0edab0 RIP=ffffffff814c027c 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 00007fd341bec900 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=00007fd3421a3618 CR3=000000001a3c4000 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=6e69676f6c5f6d61702c78756e696c65 XMM02=755f6d61702c74696d7265705f6d6170 XMM03=2c766e655f6d61702c7374696d696c5f XMM04=6d61702c766e655f6d61702c7374696d XMM05=78696e755f6d61702c74696d7265705f XMM06=6469756e69676f6c5f6d61702c78756e XMM07=672065736f6c635f6e6f69737365733a XMM08=61662029286e65706f5f746964756100 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=ffff88806cf36180 RBX=ffff888016522ab0 RCX=ffffffff815343f6 RDX=0000000000000000 RSI=0000000000000008 RDI=ffffffff85d3d350 RBP=ffff88800844f780 RSP=ffff88806cf09e00 R8 =0000000000000000 R9 =fffffbfff0ba7a6a R10=ffffffff85d3d357 R11=0000000000000000 R12=0000000000000200 R13=ffffea0000594880 R14=ffffffff813782f8 R15=ffff888016522b30 RIP=ffffffff8181073a RFL=00000046 [---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=00007f47d4cc0390 CR3=000000000dbc0000 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=2031323a35343a3331203032206e754a XMM01=73732878696e755f6d6170203a5d3932 XMM02=65736f6c63206e6f6973736573203a29 XMM03=755f6d6170203a5d3932325b64687373 XMM04=69662068637573206f4e203a656c6163 XMM05=3a656c696620766e65206e65706f206f XMM06=65733a6468737328766e655f6d617020 XMM07=6b7a79732030323a35343a3331203032 XMM08=3d656e696c646d632022656369767265 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000