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robot noticed "BUG:kernel_NULL_pointer_dereference,address" on: commit: 540335e9878005bf238ab4e1f91e8df0e3091a03 ("maple_tree: restart walk on correct status") https://git.kernel.org/cgit/linux/kernel/git/next/linux-next.git master [test failed on linux-next/master 6e5ab6fee68df8c40b338baeae6e269fa25a7e25] in testcase: trinity version: trinity-x86_64-ba2360ed-1_20241228 with following parameters: runtime: 600s config: x86_64-randconfig-008-20250618 compiler: gcc-12 test machine: qemu-system-x86_64 -enable-kvm -cpu SandyBridge -smp 2 -m 16G (please refer to attached dmesg/kmsg for entire log/backtrace) +--------------------------------------------------------------------------------------+------------+------------+ | | cedafc1185 | 540335e987 | +--------------------------------------------------------------------------------------+------------+------------+ | BUG:kernel_NULL_pointer_dereference,address | 0 | 6 | | Oops | 0 | 6 | | RIP:mtree_range_walk | 0 | 6 | | Kernel_panic-not_syncing:Fatal_exception | 0 | 6 | +--------------------------------------------------------------------------------------+------------+------------+ If you fix the issue in a separate patch/commit (i.e. not just a new version of the same patch/commit), kindly add following tags | Reported-by: kernel test robot | Closes: https://lore.kernel.org/oe-lkp/202506191556.6bfc7b93-lkp@intel.com [ 85.005305][ T5293] BUG: kernel NULL pointer dereference, address: 0000000000000000 [ 85.006027][ T5293] #PF: supervisor read access in kernel mode [ 85.006448][ T5293] #PF: error_code(0x0000) - not-present page [ 85.006895][ T5293] PGD 156b29067 P4D 156b29067 PUD 0 [ 85.007264][ T5293] Oops: Oops: 0000 [#1] SMP [ 85.007587][ T5293] CPU: 1 UID: 65534 PID: 5293 Comm: trinity-c7 Not tainted 6.16.0-rc2-00111-g540335e98780 #1 PREEMPT(full) 36afef0ad633c67fb03a70379195b878849f7042 [ 85.008687][ T5293] RIP: 0010:mtree_range_walk (lib/maple_tree.c:2773) [ 85.010012][ T5293] Code: 89 45 a0 e8 4d d8 86 ff 48 8b 45 a0 48 39 45 c0 74 18 49 83 fc 03 76 0f 4c 89 e6 48 c7 c7 a0 8d 3e 9c e8 c2 85 b1 ff 45 89 ef <4d> 8b 2e 48 8b 53 08 49 39 d5 73 32 49 8d 46 08 41 b4 01 45 38 fc All code ======== 0: 89 45 a0 mov %eax,-0x60(%rbp) 3: e8 4d d8 86 ff call 0xffffffffff86d855 8: 48 8b 45 a0 mov -0x60(%rbp),%rax c: 48 39 45 c0 cmp %rax,-0x40(%rbp) 10: 74 18 je 0x2a 12: 49 83 fc 03 cmp $0x3,%r12 16: 76 0f jbe 0x27 18: 4c 89 e6 mov %r12,%rsi 1b: 48 c7 c7 a0 8d 3e 9c mov $0xffffffff9c3e8da0,%rdi 22: e8 c2 85 b1 ff call 0xffffffffffb185e9 27: 45 89 ef mov %r13d,%r15d 2a:* 4d 8b 2e mov (%r14),%r13 <-- trapping instruction 2d: 48 8b 53 08 mov 0x8(%rbx),%rdx 31: 49 39 d5 cmp %rdx,%r13 34: 73 32 jae 0x68 36: 49 8d 46 08 lea 0x8(%r14),%rax 3a: 41 b4 01 mov $0x1,%r12b 3d: 45 38 fc cmp %r15b,%r12b Code starting with the faulting instruction =========================================== 0: 4d 8b 2e mov (%r14),%r13 3: 48 8b 53 08 mov 0x8(%rbx),%rdx 7: 49 39 d5 cmp %rdx,%r13 a: 73 32 jae 0x3e c: 49 8d 46 08 lea 0x8(%r14),%rax 10: 41 b4 01 mov $0x1,%r12b 13: 45 38 fc cmp %r15b,%r12b [ 85.011432][ T5293] RSP: 0018:ffffb56182fffd88 EFLAGS: 00010246 [ 85.011917][ T5293] RAX: 0000000000000000 RBX: ffffb56182fffe80 RCX: 0000000000000000 [ 85.012541][ T5293] RDX: 0000000000000000 RSI: 0000000000000000 RDI: 0000000000000000 [ 85.013167][ T5293] RBP: ffffb56182fffdf0 R08: 0000000000000000 R09: 0000000000000000 [ 85.013806][ T5293] R10: 0000000000000000 R11: 0000000000000000 R12: 0000000000000fff [ 85.014420][ T5293] R13: 0000000000000000 R14: 0000000000000000 R15: 0000000000000000 [ 85.015039][ T5293] FS: 00007f93d413a740(0000) GS:ffff922b1356c000(0000) knlGS:0000000000000000 [ 85.015721][ T5293] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 [ 85.016227][ T5293] CR2: 0000000000000000 CR3: 000000016d4f8000 CR4: 00000000000406b0 [ 85.016837][ T5293] DR0: 00007f93d220d000 DR1: 0000000000000000 DR2: 0000000000000000 [ 85.017464][ T5293] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000600 [ 85.018096][ T5293] Call Trace: [ 85.018359][ T5293] [ 85.018588][ T5293] ? mmap_write_lock (include/linux/seqlock.h:431 include/linux/mmap_lock.h:87 include/linux/mmap_lock.h:357) [ 85.018970][ T5293] mas_state_walk (lib/maple_tree.c:3630) [ 85.019311][ T5293] mas_walk (lib/maple_tree.c:279 lib/maple_tree.c:4937) [ 85.019619][ T5293] mas_find (lib/maple_tree.c:5990 lib/maple_tree.c:6044) [ 85.019967][ T5293] vma_find (include/linux/mm.h:856) [ 85.020288][ T5293] __do_sys_set_mempolicy_home_node (mm/mempolicy.c:1723) [ 85.020764][ T5293] __x64_sys_set_mempolicy_home_node (mm/mempolicy.c:1688) [ 85.021229][ T5293] x64_sys_call (kbuild/obj/consumer/x86_64-randconfig-008-20250618/./arch/x86/include/generated/asm/syscalls_64.h:451) [ 85.021592][ T5293] do_syscall_64 (arch/x86/entry/syscall_64.c:96) [ 85.021973][ T5293] entry_SYSCALL_64_after_hwframe (arch/x86/entry/entry_64.S:130) [ 85.022454][ T5293] RIP: 0033:0x7f93d423e719 [ 85.022822][ T5293] Code: 08 89 e8 5b 5d c3 66 2e 0f 1f 84 00 00 00 00 00 90 48 89 f8 48 89 f7 48 89 d6 48 89 ca 4d 89 c2 4d 89 c8 4c 8b 4c 24 08 0f 05 <48> 3d 01 f0 ff ff 73 01 c3 48 8b 0d b7 06 0d 00 f7 d8 64 89 01 48 All code ======== 0: 08 89 e8 5b 5d c3 or %cl,-0x3ca2a418(%rcx) 6: 66 2e 0f 1f 84 00 00 cs nopw 0x0(%rax,%rax,1) d: 00 00 00 10: 90 nop 11: 48 89 f8 mov %rdi,%rax 14: 48 89 f7 mov %rsi,%rdi 17: 48 89 d6 mov %rdx,%rsi 1a: 48 89 ca mov %rcx,%rdx 1d: 4d 89 c2 mov %r8,%r10 20: 4d 89 c8 mov %r9,%r8 23: 4c 8b 4c 24 08 mov 0x8(%rsp),%r9 28: 0f 05 syscall 2a:* 48 3d 01 f0 ff ff cmp $0xfffffffffffff001,%rax <-- trapping instruction 30: 73 01 jae 0x33 32: c3 ret 33: 48 8b 0d b7 06 0d 00 mov 0xd06b7(%rip),%rcx # 0xd06f1 3a: f7 d8 neg %eax 3c: 64 89 01 mov %eax,%fs:(%rcx) 3f: 48 rex.W Code starting with the faulting instruction =========================================== 0: 48 3d 01 f0 ff ff cmp $0xfffffffffffff001,%rax 6: 73 01 jae 0x9 8: c3 ret 9: 48 8b 0d b7 06 0d 00 mov 0xd06b7(%rip),%rcx # 0xd06c7 10: f7 d8 neg %eax 12: 64 89 01 mov %eax,%fs:(%rcx) 15: 48 rex.W [ 85.024289][ T5293] RSP: 002b:00007ffd10d04c48 EFLAGS: 00000246 ORIG_RAX: 00000000000001c2 [ 85.024897][ T5293] RAX: ffffffffffffffda RBX: 0000000000000002 RCX: 00007f93d423e719 [ 85.025466][ T5293] RDX: 0000000000000000 RSI: 0000000000000005 RDI: 0000000000000000 [ 85.026060][ T5293] RBP: 00007f93d2b43058 R08: 0000000000000001 R09: 0000000000002000 [ 85.026652][ T5293] R10: 0000000000000000 R11: 0000000000000246 R12: 00000000000001c2 [ 85.027238][ T5293] R13: 00007f93d413a6c0 R14: 00007f93d2b43058 R15: 00007f93d2b43000 [ 85.027870][ T5293] [ 85.028106][ T5293] Modules linked in: polyval_clmulni ghash_clmulni_intel sha512_ssse3 sha1_ssse3 crypto_hash aesni_intel gf128mul libaes aead crypto_skcipher cryptomgr crypto_algapi crypto evdev qemu_fw_cfg [ 85.029570][ T5293] CR2: 0000000000000000 [ 85.030009][ T5293] ---[ end trace 0000000000000000 ]--- [ 85.037300][ T5293] RIP: 0010:mtree_range_walk (lib/maple_tree.c:2773) [ 85.037762][ T5293] Code: 89 45 a0 e8 4d d8 86 ff 48 8b 45 a0 48 39 45 c0 74 18 49 83 fc 03 76 0f 4c 89 e6 48 c7 c7 a0 8d 3e 9c e8 c2 85 b1 ff 45 89 ef <4d> 8b 2e 48 8b 53 08 49 39 d5 73 32 49 8d 46 08 41 b4 01 45 38 fc All code ======== 0: 89 45 a0 mov %eax,-0x60(%rbp) 3: e8 4d d8 86 ff call 0xffffffffff86d855 8: 48 8b 45 a0 mov -0x60(%rbp),%rax c: 48 39 45 c0 cmp %rax,-0x40(%rbp) 10: 74 18 je 0x2a 12: 49 83 fc 03 cmp $0x3,%r12 16: 76 0f jbe 0x27 18: 4c 89 e6 mov %r12,%rsi 1b: 48 c7 c7 a0 8d 3e 9c mov $0xffffffff9c3e8da0,%rdi 22: e8 c2 85 b1 ff call 0xffffffffffb185e9 27: 45 89 ef mov %r13d,%r15d 2a:* 4d 8b 2e mov (%r14),%r13 <-- trapping instruction 2d: 48 8b 53 08 mov 0x8(%rbx),%rdx 31: 49 39 d5 cmp %rdx,%r13 34: 73 32 jae 0x68 36: 49 8d 46 08 lea 0x8(%r14),%rax 3a: 41 b4 01 mov $0x1,%r12b 3d: 45 38 fc cmp %r15b,%r12b Code starting with the faulting instruction =========================================== 0: 4d 8b 2e mov (%r14),%r13 3: 48 8b 53 08 mov 0x8(%rbx),%rdx 7: 49 39 d5 cmp %rdx,%r13 a: 73 32 jae 0x3e c: 49 8d 46 08 lea 0x8(%r14),%rax 10: 41 b4 01 mov $0x1,%r12b 13: 45 38 fc cmp %r15b,%r12b The kernel config and materials to reproduce are available at: https://download.01.org/0day-ci/archive/20250619/202506191556.6bfc7b93-lkp@intel.com -- 0-DAY CI Kernel Test Service https://github.com/intel/lkp-tests/wiki