syzkaller login: [ 37.769806] BUG: Bad rss-counter state mm:00000000565b63ca type:MM_FILEPAGES val:33 [ 37.770831] BUG: Bad rss-counter state mm:00000000565b63ca type:MM_ANONPAGES val:22 [ 37.933483] ================================================================== [ 37.934739] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 37.935998] Read of size 8 at addr ffff88800f358b38 by task sshd/220 [ 37.937027] [ 37.937326] CPU: 0 PID: 220 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 37.938488] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 37.939800] Call Trace: [ 37.940230] [ 37.940609] dump_stack_lvl+0x91/0xf0 [ 37.941274] print_report+0xcc/0x620 [ 37.941932] ? __virt_addr_valid+0x102/0x340 [ 37.942692] ? vma_interval_tree_remove+0xc75/0xec0 [ 37.943493] ? vma_interval_tree_remove+0xc75/0xec0 [ 37.944312] kasan_report+0xbe/0xf0 [ 37.944940] ? vma_interval_tree_remove+0xc75/0xec0 [ 37.945767] vma_interval_tree_remove+0xc75/0xec0 [ 37.946577] vma_prepare+0xc54/0x11a0 [ 37.947228] __split_vma+0x5af/0x950 [ 37.947913] ? __pfx___split_vma+0x10/0x10 [ 37.948620] ? find_held_lock+0x2c/0x110 [ 37.949311] do_vmi_align_munmap+0x2ba/0x11f0 [ 37.950047] ? lock_is_held_type+0x9f/0x120 [ 37.950767] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 37.951586] ? mtree_range_walk+0x632/0x900 [ 37.952355] ? mas_walk+0x5c7/0x7c0 [ 37.953003] do_vmi_munmap+0x1f1/0x2b0 [ 37.953679] mmap_region+0x1f9/0x2660 [ 37.954343] ? vm_mmap_pgoff+0x15c/0x3a0 [ 37.955030] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 37.956023] ? __pfx_lock_acquire+0x10/0x10 [ 37.956752] ? __pfx_mmap_region+0x10/0x10 [ 37.957459] ? security_mmap_addr+0x7d/0xa0 [ 37.958148] ? get_unmapped_area+0x1f5/0x3f0 [ 37.958871] do_mmap+0x854/0xf00 [ 37.959436] vm_mmap_pgoff+0x1a6/0x3a0 [ 37.960112] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 37.960862] ksys_mmap_pgoff+0x3af/0x500 [ 37.961556] do_syscall_64+0x3f/0x90 [ 37.962205] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 37.963084] RIP: 0033:0x7f7900362d82 [ 37.963710] 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 [ 37.965880] RSP: 002b:00007fff6ad10298 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 37.966791] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f7900362d82 [ 37.967641] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f78ff79c000 [ 37.968498] RBP: 00007f78ff79c000 R08: 0000000000000009 R09: 0000000000001000 [ 37.969358] R10: 0000000000000812 R11: 0000000000000206 R12: 0000563ff43d7b20 [ 37.970220] R13: 00007fff6ad102b0 R14: 00007fff6ad102e0 R15: 00007fff6ad10640 [ 37.971091] [ 37.971385] [ 37.971598] Allocated by task 213: [ 37.972047] kasan_save_stack+0x22/0x50 [ 37.972565] kasan_set_track+0x25/0x30 [ 37.973077] __kasan_slab_alloc+0x59/0x70 [ 37.973603] kmem_cache_alloc+0x16b/0x370 [ 37.974130] vm_area_dup+0x20/0x160 [ 37.974596] __split_vma+0x170/0x950 [ 37.975069] split_vma+0xc6/0x110 [ 37.975509] mprotect_fixup+0x8d2/0xb30 [ 37.976026] do_mprotect_pkey+0x87e/0xd40 [ 37.976557] __x64_sys_mprotect+0x78/0xc0 [ 37.977076] do_syscall_64+0x3f/0x90 [ 37.977551] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 37.978201] [ 37.978417] Freed by task 19: [ 37.978798] kasan_save_stack+0x22/0x50 [ 37.979302] kasan_set_track+0x25/0x30 [ 37.979823] kasan_save_free_info+0x2b/0x50 [ 37.980358] __kasan_slab_free+0x10a/0x190 [ 37.980892] kmem_cache_free+0x10d/0x4d0 [ 37.981406] rcu_core+0x8c8/0x2860 [ 37.981849] __do_softirq+0x1b7/0x7d4 [ 37.982330] [ 37.982543] Last potentially related work creation: [ 37.983162] kasan_save_stack+0x22/0x50 [ 37.983687] __kasan_record_aux_stack+0x8e/0xa0 [ 37.984271] __call_rcu_common.constprop.0+0x6a/0xb90 [ 37.984965] remove_vma+0x139/0x170 [ 37.985430] do_vmi_align_munmap+0xd4a/0x11f0 [ 37.986012] do_vmi_munmap+0x1f1/0x2b0 [ 37.986522] __vm_munmap+0x138/0x3a0 [ 37.987004] __x64_sys_munmap+0x59/0x80 [ 37.987515] do_syscall_64+0x3f/0x90 [ 37.988015] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 37.988667] [ 37.988893] The buggy address belongs to the object at ffff88800f358ae0 [ 37.988893] which belongs to the cache vm_area_struct of size 168 [ 37.990428] The buggy address is located 88 bytes inside of [ 37.990428] freed 168-byte region [ffff88800f358ae0, ffff88800f358b88) [ 37.991914] [ 37.992138] The buggy address belongs to the physical page: [ 37.992820] page:000000005c7650fe refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xf358 [ 37.993935] memcg:ffff88801a4ca701 [ 37.994368] flags: 0x100000000000200(slab|node=0|zone=1) [ 37.995032] page_type: 0xffffffff() [ 37.995498] raw: 0100000000000200 ffff88800879fc80 dead000000000122 0000000000000000 [ 37.996442] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88801a4ca701 [ 37.997385] page dumped because: kasan: bad access detected [ 37.998082] [ 37.998301] Memory state around the buggy address: [ 37.998908] ffff88800f358a00: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 37.999823] ffff88800f358a80: 00 00 00 00 fc fc fc fc fc fc fc fc fa fb fb fb [ 38.000700] >ffff88800f358b00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 38.001576] ^ [ 38.002211] ffff88800f358b80: fb fc fc fc fc fc fc fc fc fa fb fb fb fb fb fb [ 38.003093] ffff88800f358c00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fc fc [ 38.003989] ================================================================== [ 38.005082] Disabling lock debugging due to kernel taint [ 39.954891] BUG: Bad rss-counter state mm:00000000c5e15aa4 type:MM_FILEPAGES val:33 [ 39.956104] BUG: Bad rss-counter state mm:00000000c5e15aa4 type:MM_ANONPAGES val:22 [ 40.424801] BUG: Bad rss-counter state mm:00000000c5c49b8f type:MM_FILEPAGES val:33 [ 40.425836] BUG: Bad rss-counter state mm:00000000c5c49b8f type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:11202' (ECDSA) to the list of known hosts. 2023/06/19 19:36:09 fuzzer started 2023/06/19 19:36:09 dialing manager at localhost:44161 2023/06/19 19:36:09 checking machine... 2023/06/19 19:36:09 checking revisions... [ 41.078705] kmemleak: Automatic memory scanning thread ended 2023/06/19 19:36:09 testing simple program... [ 41.119073] cgroup: Unknown subsys name 'net' [ 41.176462] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 19:36:01 Registers: info registers vcpu 0 RAX=0000000080000000 RBX=0000000000000000 RCX=0000000000000000 RDX=ffff88800eac51c0 RSI=ffffffff83638936 RDI=0000000000000007 RBP=ffff888016a67e60 RSP=ffff888016a67b48 R8 =0000000000000007 R9 =0000000000000000 R10=00000000000000e8 R11=00000000000b6996 R12=00000000000000e8 R13=0000000000000000 R14=0000000000000000 R15=ffff888016a67ea4 RIP=ffffffff814c0800 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 00007f9305f0b900 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=00007f93064c2618 CR3=000000000eba6000 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=1ffffffff0c0a8d7 RBX=ffffffff860546b8 RCX=ffffffff84601449 RDX=0000000000000000 RSI=ffffffff864baff8 RDI=ffffffff8605469c RBP=ffffffff8605469c RSP=ffff88806cf099e0 R8 =ffffffff864baff8 R9 =ffff88806cf09ad8 R10=0000000000038001 R11=00000000000b6cb2 R12=ffffffff860546d8 R13=ffffffff8605469c R14=ffffffff8605469c R15=dffffc0000000000 RIP=ffffffff8112fc7f RFL=00000216 [----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 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=00007f7609293940 CR3=000000000f082000 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=2038303a36333a3931203931206e754a XMM01=73732878696e755f6d6170203a5d3033 XMM02=65736f6c63206e6f6973736573203a29 XMM03=755f6d6170203a5d3033325b64687373 XMM04=69662068637573206f4e203a656c6163 XMM05=3a656c696620766e65206e65706f206f XMM06=65733a6468737328766e655f6d617020 XMM07=6b7a79732038303a36333a3931203931 XMM08=3d656e696c646d632022656369767265 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000