syzkaller login: [ 39.050591] BUG: Bad rss-counter state mm:00000000a655ba8d type:MM_FILEPAGES val:33 [ 39.051291] BUG: Bad rss-counter state mm:00000000a655ba8d type:MM_ANONPAGES val:22 [ 39.078374] ================================================================== [ 39.079047] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 39.079727] Read of size 8 at addr ffff88800f1d8880 by task sshd/221 [ 39.080285] [ 39.080453] CPU: 1 PID: 221 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 39.081108] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 39.081828] Call Trace: [ 39.082114] [ 39.082305] dump_stack_lvl+0x91/0xf0 [ 39.082707] print_report+0xcc/0x620 [ 39.083137] ? __virt_addr_valid+0x102/0x340 [ 39.083508] ? vma_interval_tree_remove+0xc75/0xec0 [ 39.083980] ? vma_interval_tree_remove+0xc75/0xec0 [ 39.084443] kasan_report+0xbe/0xf0 [ 39.084791] ? vma_interval_tree_remove+0xc75/0xec0 [ 39.085238] vma_interval_tree_remove+0xc75/0xec0 [ 39.085688] vma_prepare+0xc54/0x11a0 [ 39.086039] __split_vma+0x5af/0x950 [ 39.086396] ? __pfx___split_vma+0x10/0x10 [ 39.086822] ? find_held_lock+0x2c/0x110 [ 39.087234] do_vmi_align_munmap+0x2ba/0x11f0 [ 39.087683] ? lock_is_held_type+0x9f/0x120 [ 39.088099] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 39.088498] ? mtree_range_walk+0x632/0x900 [ 39.088852] ? mas_walk+0x5c7/0x7c0 [ 39.089241] do_vmi_munmap+0x1f1/0x2b0 [ 39.089562] mmap_region+0x1f9/0x2660 [ 39.089872] ? vm_mmap_pgoff+0x15c/0x3a0 [ 39.090233] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 39.090709] ? __pfx_lock_acquire+0x10/0x10 [ 39.091080] ? __pfx_mmap_region+0x10/0x10 [ 39.091445] ? security_mmap_addr+0x7d/0xa0 [ 39.091792] ? get_unmapped_area+0x1f5/0x3f0 [ 39.092152] do_mmap+0x854/0xf00 [ 39.092437] vm_mmap_pgoff+0x1a6/0x3a0 [ 39.092759] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 39.093124] ksys_mmap_pgoff+0x3af/0x500 [ 39.093449] do_syscall_64+0x3f/0x90 [ 39.093757] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 39.094180] RIP: 0033:0x7f98369f0d82 [ 39.094475] 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 [ 39.095845] RSP: 002b:00007ffef360edb8 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 39.096434] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f98369f0d82 [ 39.096988] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f9835e2a000 [ 39.097543] RBP: 00007f9835e2a000 R08: 0000000000000009 R09: 0000000000001000 [ 39.098093] R10: 0000000000000812 R11: 0000000000000206 R12: 000055e0716abec0 [ 39.098653] R13: 00007ffef360edd0 R14: 00007ffef360ee00 R15: 00007ffef360f160 [ 39.099202] [ 39.099393] [ 39.099536] Allocated by task 214: [ 39.099815] kasan_save_stack+0x22/0x50 [ 39.100152] kasan_set_track+0x25/0x30 [ 39.100470] __kasan_slab_alloc+0x59/0x70 [ 39.100807] kmem_cache_alloc+0x16b/0x370 [ 39.101138] vm_area_dup+0x20/0x160 [ 39.101429] __split_vma+0x170/0x950 [ 39.101732] split_vma+0xc6/0x110 [ 39.102019] mprotect_fixup+0x8d2/0xb30 [ 39.102348] do_mprotect_pkey+0x87e/0xd40 [ 39.102723] __x64_sys_mprotect+0x78/0xc0 [ 39.103078] do_syscall_64+0x3f/0x90 [ 39.103379] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 39.103784] [ 39.103920] Freed by task 214: [ 39.104186] kasan_save_stack+0x22/0x50 [ 39.104507] kasan_set_track+0x25/0x30 [ 39.104826] kasan_save_free_info+0x2b/0x50 [ 39.105165] __kasan_slab_free+0x10a/0x190 [ 39.105507] kmem_cache_free+0x10d/0x4d0 [ 39.105831] rcu_core+0x8c8/0x2860 [ 39.106133] __do_softirq+0x1b7/0x7d4 [ 39.106437] [ 39.106589] Last potentially related work creation: [ 39.106971] kasan_save_stack+0x22/0x50 [ 39.107299] __kasan_record_aux_stack+0x8e/0xa0 [ 39.107670] __call_rcu_common.constprop.0+0x6a/0xb90 [ 39.108082] remove_vma+0x139/0x170 [ 39.108370] do_vmi_align_munmap+0xd4a/0x11f0 [ 39.108727] do_vmi_munmap+0x1f1/0x2b0 [ 39.109041] __vm_munmap+0x138/0x3a0 [ 39.109342] __x64_sys_munmap+0x59/0x80 [ 39.109668] do_syscall_64+0x3f/0x90 [ 39.109972] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 39.110386] [ 39.110542] The buggy address belongs to the object at ffff88800f1d8828 [ 39.110542] which belongs to the cache vm_area_struct of size 168 [ 39.111490] The buggy address is located 88 bytes inside of [ 39.111490] freed 168-byte region [ffff88800f1d8828, ffff88800f1d88d0) [ 39.112390] [ 39.112530] The buggy address belongs to the physical page: [ 39.112952] page:000000005868f70b refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xf1d8 [ 39.113648] memcg:ffff88800b357101 [ 39.113922] flags: 0x100000000000200(slab|node=0|zone=1) [ 39.114337] page_type: 0xffffffff() [ 39.114637] raw: 0100000000000200 ffff88800879fc80 ffffea000038e6c0 dead000000000006 [ 39.115223] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800b357101 [ 39.115796] page dumped because: kasan: bad access detected [ 39.116217] [ 39.116356] Memory state around the buggy address: [ 39.116728] ffff88800f1d8780: fb fb fb fb fb fb fb fb fb fb fb fb fb fc fc fc [ 39.117272] ffff88800f1d8800: fc fc fc fc fc fa fb fb fb fb fb fb fb fb fb fb [ 39.117838] >ffff88800f1d8880: fb fb fb fb fb fb fb fb fb fb fc fc fc fc fc fc [ 39.118396] ^ [ 39.118666] ffff88800f1d8900: fc fc 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 39.119209] ffff88800f1d8980: 00 00 00 00 00 00 00 fc fc fc fc fc fc fc fc fa [ 39.119741] ================================================================== [ 39.120400] Disabling lock debugging due to kernel taint [ 40.779650] BUG: Bad rss-counter state mm:00000000c37a96a7 type:MM_FILEPAGES val:33 [ 40.780326] BUG: Bad rss-counter state mm:00000000c37a96a7 type:MM_ANONPAGES val:22 [ 41.131146] BUG: Bad rss-counter state mm:000000009139d895 type:MM_FILEPAGES val:33 [ 41.131799] BUG: Bad rss-counter state mm:000000009139d895 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:35369' (ECDSA) to the list of known hosts. 2023/06/20 09:38:47 fuzzer started 2023/06/20 09:38:48 dialing manager at localhost:44161 2023/06/20 09:38:48 checking machine... 2023/06/20 09:38:48 checking revisions... [ 41.689891] kmemleak: Automatic memory scanning thread ended 2023/06/20 09:38:48 testing simple program... [ 41.726678] cgroup: Unknown subsys name 'net' [ 41.766219] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 09:38:47 Registers: info registers vcpu 0 RAX=ffff88806ce35000 RBX=0000000000000000 RCX=ffffffff8450c50e RDX=ffffed100d9c6a01 RSI=0000000000000004 RDI=ffffffff812889a5 RBP=dffffc0000000000 RSP=ffffffff85407e10 R8 =0000000000000000 R9 =ffffed100d9c6a00 R10=ffff88806ce35003 R11=ffff888008c58000 R12=ffffffff85d3bed0 R13=1ffffffff0a80fc7 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 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=00007f6373aa8560 CR3=000000000d960000 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=86d1dcf0adab63bbc04ec4f10c898c71 XMM02=000000000011e660ec2efd57dc4c00df XMM03=000000000012488847e62db198c914e7 XMM04=2023bac6e641158200000000000ae988 XMM05=e4cb8bb95a7664b600000000001340a0 XMM06=f486c281b7049c6b0000000000133278 XMM07=e042d86d42eb936e0000000000124b60 XMM08=47e62db198c914e7000000000011e6c0 XMM09=00000000000000000000000000000000 XMM10=20200000000020202020202020200000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=0000000000000001 RBX=ffffffff83639306 RCX=0000000000000001 RDX=1ffff11001e0fede RSI=ffff88800f07fcb0 RDI=ffffffff83639306 RBP=ffff88800f07f6f0 RSP=ffff88800f07f668 R8 =0000000000000001 R9 =ffff88800f07f6d8 R10=0000000000038001 R11=0000000000091be7 R12=ffff88800f07f760 R13=0000000000000000 R14=ffff88800e5051c0 R15=0000000000092cc0 RIP=ffffffff84532a40 RFL=00000296 [--S-AP-] 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 00007fe683dee900 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=00007ffd26a75000 CR3=00000000094a2000 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=6720646572637465733a4d41503d706f XMM01=652022746f6f72223d74636361207469 XMM02=3d6c616e696d72657420322e322e302e XMM03=3d656d616e74736f682022646873732f XMM04=40404040404040404040404040404040 XMM05=5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a XMM06=20202020202020202020202020202020 XMM07=00000000000000000000000000000000 XMM08=652075253d64692073253d706f000000 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000