syzkaller login: [ 31.362603] BUG: Bad rss-counter state mm:000000002f833066 type:MM_FILEPAGES val:33 [ 31.363607] BUG: Bad rss-counter state mm:000000002f833066 type:MM_ANONPAGES val:22 [ 31.522195] ================================================================== [ 31.523110] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 31.524022] Read of size 8 at addr ffff88800c9c8228 by task sshd/220 [ 31.524827] [ 31.525086] CPU: 1 PID: 220 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 31.525915] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 31.526861] Call Trace: [ 31.527184] [ 31.527456] dump_stack_lvl+0x91/0xf0 [ 31.527928] print_report+0xcc/0x620 [ 31.528416] ? __virt_addr_valid+0x102/0x340 [ 31.528996] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.529643] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.530304] kasan_report+0xbe/0xf0 [ 31.530808] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.531467] vma_interval_tree_remove+0xc75/0xec0 [ 31.532161] vma_prepare+0xc54/0x11a0 [ 31.532683] __split_vma+0x5af/0x950 [ 31.533209] ? __pfx___split_vma+0x10/0x10 [ 31.533790] ? find_held_lock+0x2c/0x110 [ 31.534352] do_vmi_align_munmap+0x2ba/0x11f0 [ 31.534885] ? lock_is_held_type+0x9f/0x120 [ 31.535408] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 31.536012] ? mtree_range_walk+0x632/0x900 [ 31.536557] ? mas_walk+0x5c7/0x7c0 [ 31.537007] do_vmi_munmap+0x1f1/0x2b0 [ 31.537473] mmap_region+0x1f9/0x2660 [ 31.537956] ? vm_mmap_pgoff+0x15c/0x3a0 [ 31.538453] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 31.539131] ? __pfx_lock_acquire+0x10/0x10 [ 31.539639] ? __pfx_mmap_region+0x10/0x10 [ 31.540152] ? security_mmap_addr+0x7d/0xa0 [ 31.540656] ? get_unmapped_area+0x1f5/0x3f0 [ 31.541178] do_mmap+0x854/0xf00 [ 31.541595] vm_mmap_pgoff+0x1a6/0x3a0 [ 31.542094] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 31.542699] ksys_mmap_pgoff+0x3af/0x500 [ 31.543248] do_syscall_64+0x3f/0x90 [ 31.543766] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.544509] RIP: 0033:0x7fa44c518d82 [ 31.545038] 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 [ 31.547447] RSP: 002b:00007ffcacad5f68 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 31.548426] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007fa44c518d82 [ 31.549351] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007fa44b952000 [ 31.550280] RBP: 00007fa44b952000 R08: 0000000000000009 R09: 0000000000001000 [ 31.551199] R10: 0000000000000812 R11: 0000000000000206 R12: 000055d80f433b20 [ 31.552114] R13: 00007ffcacad5f80 R14: 00007ffcacad5fb0 R15: 00007ffcacad6310 [ 31.553079] [ 31.553407] [ 31.553648] Allocated by task 213: [ 31.554140] kasan_save_stack+0x22/0x50 [ 31.554703] kasan_set_track+0x25/0x30 [ 31.555233] __kasan_slab_alloc+0x59/0x70 [ 31.555782] kmem_cache_alloc+0x16b/0x370 [ 31.556328] vm_area_dup+0x20/0x160 [ 31.556810] __split_vma+0x170/0x950 [ 31.557325] split_vma+0xc6/0x110 [ 31.557811] mprotect_fixup+0x8d2/0xb30 [ 31.558360] do_mprotect_pkey+0x87e/0xd40 [ 31.558870] __x64_sys_mprotect+0x78/0xc0 [ 31.559374] do_syscall_64+0x3f/0x90 [ 31.559841] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.560464] [ 31.560674] Freed by task 213: [ 31.561056] kasan_save_stack+0x22/0x50 [ 31.561547] kasan_set_track+0x25/0x30 [ 31.562042] kasan_save_free_info+0x2b/0x50 [ 31.562557] __kasan_slab_free+0x10a/0x190 [ 31.563077] kmem_cache_free+0x10d/0x4d0 [ 31.563575] rcu_core+0x8c8/0x2860 [ 31.564006] __do_softirq+0x1b7/0x7d4 [ 31.564468] [ 31.564675] Last potentially related work creation: [ 31.565228] kasan_save_stack+0x22/0x50 [ 31.565701] __kasan_record_aux_stack+0x8e/0xa0 [ 31.566299] __call_rcu_common.constprop.0+0x6a/0xb90 [ 31.566928] remove_vma+0x139/0x170 [ 31.567360] do_vmi_align_munmap+0xd4a/0x11f0 [ 31.567888] do_vmi_munmap+0x1f1/0x2b0 [ 31.568352] __vm_munmap+0x138/0x3a0 [ 31.568793] __x64_sys_munmap+0x59/0x80 [ 31.569264] do_syscall_64+0x3f/0x90 [ 31.569708] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.570337] [ 31.570543] The buggy address belongs to the object at ffff88800c9c81d0 [ 31.570543] which belongs to the cache vm_area_struct of size 168 [ 31.571912] The buggy address is located 88 bytes inside of [ 31.571912] freed 168-byte region [ffff88800c9c81d0, ffff88800c9c8278) [ 31.573325] [ 31.573550] The buggy address belongs to the physical page: [ 31.574244] page:00000000eab2f097 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xc9c8 [ 31.575359] memcg:ffff88800ddd9701 [ 31.575774] flags: 0x100000000000200(slab|node=0|zone=1) [ 31.576400] page_type: 0xffffffff() [ 31.576841] raw: 0100000000000200 ffff88800879fc80 ffffea0000384280 dead000000000002 [ 31.577735] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800ddd9701 [ 31.578642] page dumped because: kasan: bad access detected [ 31.579304] [ 31.579517] Memory state around the buggy address: [ 31.580090] ffff88800c9c8100: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 31.580932] ffff88800c9c8180: 00 00 fc fc fc fc fc fc fc fc fa fb fb fb fb fb [ 31.581779] >ffff88800c9c8200: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fc [ 31.582625] ^ [ 31.583174] ffff88800c9c8280: fc fc fc fc fc fc fc fa fb fb fb fb fb fb fb fb [ 31.584018] ffff88800c9c8300: fb fb fb fb fb fb fb fb fb fb fb fb fc fc fc fc [ 31.584824] ================================================================== [ 31.585775] Disabling lock debugging due to kernel taint [ 33.135122] BUG: Bad rss-counter state mm:00000000fce0beb3 type:MM_FILEPAGES val:33 [ 33.136154] BUG: Bad rss-counter state mm:00000000fce0beb3 type:MM_ANONPAGES val:22 [ 33.544119] BUG: Bad rss-counter state mm:000000006823d0a8 type:MM_FILEPAGES val:33 [ 33.545183] BUG: Bad rss-counter state mm:000000006823d0a8 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:10265' (ECDSA) to the list of known hosts. 2023/06/19 20:50:18 fuzzer started 2023/06/19 20:50:18 dialing manager at localhost:44161 2023/06/19 20:50:18 checking machine... 2023/06/19 20:50:18 checking revisions... [ 34.213491] kmemleak: Automatic memory scanning thread ended 2023/06/19 20:50:19 testing simple program... [ 34.265629] cgroup: Unknown subsys name 'net' [ 34.316274] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 20:50:18 Registers: info registers vcpu 0 RAX=1ffff11001351e08 RBX=ffff88800fadc3c0 RCX=ffffffff83ab403d RDX=0000000000000000 RSI=0000000000000004 RDI=ffffffff87f9468c RBP=000000001a3089b6 RSP=ffff88800fc4f508 R8 =0000000000000000 R9 =fffffbfff0ff29c8 R10=ffffffff87f94e43 R11=00000af600000af6 R12=0000000000000000 R13=0000000000000008 R14=dffffc0000000000 R15=ffffffff87f94640 RIP=ffffffff83ab40c9 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 00007fec10d0a900 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=00007fec112c1618 CR3=000000001692e000 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=ffff88806cf35000 RBX=0000000000000001 RCX=ffffffff8450c50e RDX=ffffed100d9e6a01 RSI=0000000000000004 RDI=ffffffff812889a5 RBP=dffffc0000000000 RSP=ffff888008e27e70 R8 =0000000000000000 R9 =ffffed100d9e6a00 R10=ffff88806cf35003 R11=0000000000000001 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=00007ffeb25d16c8 CR3=0000000005482000 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=00007f04e51ad51000005604ff12e790 XMM02=6f6974707972636e6561737268746977 XMM03=00000000000000000000000000777074 XMM04=40404040404040404040404040404040 XMM05=5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a XMM06=20202020202020202020202020202020 XMM07=ffffffffffff00ffffff00ffffff00ff XMM08=00002000000000202020002020200000 XMM09=ffffffffffff00ffffff00ffffff00ff XMM10=00002000000000202020002020200000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000